Filter element center pipe, water purification filter element and water purifier

Abstract

The utility model discloses a filter element central tube, a water purification filter element and a water purifier, relates to the field of water purification equipment, and is used for solving the problems of how to simplify a product structure and reduce manufacturing, the filter element central tube comprises a tube wall, and the inner side and the outer side of the tube wall are respectively used for arranging filter materials; the pipe wall is provided with a middle channel communicating the inner side and the outer side of the pipe wall, so that water flow filtered by the filter material on the outer side of the pipe wall can flow to the filter material on the inner side of the pipe wall; a water outlet channel is arranged in the pipe wall, and two ends of the water outlet channel are respectively communicated with the outer side and the end part of the pipe wall, so that wastewater filtered by the filter material on the outer side of the pipe wall can be discharged from the end part of the pipe wall; or one end of the water outlet channel is communicated with the inner side of the pipe wall, and the other end is communicated with the end part of the pipe wall, so that water filtered by the filter material on the inner side of the pipe wall can be discharged from the end part of the pipe wall. The filter element central tube disclosed by the utility model has more diversified functions; meanwhile, the water purification filter element and the water purifier do not need to be independently provided with a filter bottle and a water channel, so that the product structure is simplified, and the manufacturing difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the field of water purification equipment, and in particular to a filter core central tube, a water purification filter core and a water purifier. Background Art

[0002] The multi-stage filtration of traditional water purifiers is mainly achieved by setting up a filter element assembly. The filter element assembly filters water in sequence through multiple filter elements connected in series. This method has the problem of large product size.

[0003] In order to reduce the volume of the product on the basis of multi-stage filtration, in the related technology, the composite filter element is wrapped with multi-stage filter materials layer by layer on the outside of the central tube to form a concentric circle filtration structure with the central tube as the center. After the water enters the water purifier from the water inlet pipe, it is filtered by each stage of filter materials in turn, enters the tube cavity of the central tube, and is finally discharged from the tube cavity. The defects and shortcomings of this central tube structure are: the main function of the central tube is to install filter materials through the outside of the tube wall and discharge the purified water through the tube cavity. It usually does not have the function of a water channel and its function is relatively simple; the filter element and water purifier made of the central tube need to be additionally provided with a water channel, which makes the structure more complicated and the production difficulty and cost are higher.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model provides a filter core central tube, a water purification filter core and a water purifier, and at least solves the technical problem of how to increase the function of the filter core central tube and simplify the product structure.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0009] A filter core central tube comprises a tube wall, wherein the inner side and the outer side of the tube wall are respectively used for setting filter materials; the tube wall is provided with an intermediate channel connecting the inner side and the outer side of the tube wall, so that the water flow filtered by the filter material on the outer side of the tube wall can flow to the filter material on the inner side of the tube wall; the tube wall is provided with a water outlet channel, and the two ends of the water outlet channel are respectively connected to the outer side and the end of the tube wall, so that the waste water filtered by the filter material on the outer side of the tube wall can be discharged from the end of the tube wall; or one end of the water outlet channel is connected to the inner side of the tube wall, and the other end is connected to the end of the tube wall, so that the water filtered by the filter material on the inner side of the tube wall can be discharged from the end of the tube wall.

[0010] In some embodiments, the tube wall is provided with at least two mutually isolated water outlet channels, and the two ends of one water outlet channel are respectively connected to the outside and the end of the tube wall, so that the waste water filtered by the filter material on the outside of the tube wall can be discharged from the water outlet channel; one end of the other water outlet channel is connected to the inside of the tube wall, and the other end is connected to the end of the tube wall, so that the water filtered by the filter material on the inside of the tube wall can be discharged from the water outlet channel.

[0011] In some embodiments, the central tube of the filter element includes a partition, the tube wall encloses a tube cavity, the partition is arranged in the tube cavity, and divides the tube cavity into a first part and a second part, and the water outlet channel includes a water channel and a wastewater channel isolated from each other; the tube wall is used to detachably connect a first end cap and a second end cap, the first end cap is used to seal the first part of the tube cavity and form a first chamber, and the second end cap is used to seal the second part of the tube cavity and form a second chamber; the outer side of the tube wall and the shell of the water purifier form an intermediate chamber; the first chamber is provided with a first filter material, and is provided with a water inlet hole and an intermediate hole, and the water inlet hole is used to supply the first filter material to the first chamber. The chamber transports raw water, the first filter material is used to treat the raw water and obtain pretreated water, and the middle hole is used to transport pretreated water to the middle chamber; the middle chamber is provided with an middle filter material installed on the outside of the pipe wall, the middle filter material is used to treat the pretreated water and obtain intermediate water and waste water, and the two ends of the waste water channel are respectively connected to the outside and the end of the pipe wall for outputting waste water; the middle channel is used to transport intermediate water to the second chamber, the second chamber is provided with a second filter material, the second filter material is used to treat the intermediate water and obtain water, one end of the water channel is connected to the inside of the pipe wall, and the other end is connected to the end of the pipe wall for outputting water.

[0012] In some embodiments, the first end cap is provided with the middle hole, and the first filter material is provided with a first water outlet nozzle, which is sealed and connected to the inner side of the middle hole and is used to output pretreated water to the middle chamber.

[0013] In some embodiments, the first end cover is provided with a waste water pipe, a water pipe and the water inlet hole, the waste water pipe is sealedly connected to the waste water channel to output waste water to the outside of the shell, and the water pipe is sealedly connected to the water channel to output water to the outside of the shell.

[0014] In some embodiments, the intermediate filter material is wrapped around the outside of the tube wall, the intermediate hole and the entrance of the wastewater channel are respectively located on the outside of both ends of the intermediate filter material, the intermediate channel is located on the inside of the intermediate filter material, the intermediate filter material is a reverse osmosis membrane, both ends of the reverse osmosis membrane are bonded to the tube wall, the intermediate channel is located between two bonding areas, and the intermediate hole and the entrance of the wastewater channel are located outside the bonding area.

[0015] In some embodiments, the partition is integrally formed with the inner side of the tube wall and is provided with a transition hole, which connects the water channel and the second chamber; the second filter material is provided with a second water outlet, which is sealed and connected to the inner side of the transition hole and is used to transport water to the water channel.

[0016] In some embodiments, the tube wall is enclosed to form a tube cavity, the water outlet channel is a wastewater channel, and the two ends of the wastewater channel are respectively connected to the outside and the end of the tube wall; the tube wall is used to detachably connect to a third end cover, and the third end cover is used to seal the tube cavity and form a third chamber; the outside of the tube wall and the shell of the water purifier form an intermediate chamber; the intermediate chamber is provided with a raw water hole for introducing raw water, and an intermediate filter material installed on the outside of the tube wall, the intermediate filter material is used to treat raw water and obtain intermediate water and wastewater, the intermediate water enters the third chamber through the intermediate channel, and the wastewater is output through the wastewater channel; the third chamber is provided with a third filter material, the third filter material is used to treat intermediate water and obtain water, and the third chamber is provided with a water outlet hole for outputting water.

[0017] In some embodiments, the water outlet channel extends along the axial direction of the tube wall.

[0018] The utility model also provides a water purification filter element, comprising the above-mentioned filter element central tube, and also comprising the first end cover, the second end cover, the first filter material, the second filter material and the intermediate filter material.

[0019] The utility model also provides a water purifier, comprising the above-mentioned water purification filter element and the shell.

[0020] In some embodiments, the shell includes a filter bottle and a bottle cap, the filter bottle and the bottle cap are detachably connected, and the water purification filter element is detachably arranged inside the filter bottle; the bottle cap is provided with three connectors that are respectively connected to the water inlet, the water channel and the wastewater channel.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the filter element central tube, water purification filter element and water purifier provided by the utility model have the following beneficial effects: when the filter element central tube, water purification filter element and water purifier are working, different filter materials can be arranged on the inner and outer sides of the tube wall respectively, wherein the filter element central tube has the effect of a filter bottle for the inner filter material, and the water flow can flow from the middle channel to the inner filter material after being filtered by the outer filter material, the water filtered by the inner filter material can be discharged from the water outlet channel, and the waste water filtered by the outer filter material can be discharged from the water outlet channel, so the filter element central tube realizes the function of the water channel through the water outlet channel, so the filter element central tube has more diverse functions than the existing central tube; at the same time, the water purification filter element and water purifier using the filter element central tube do not need to separately set up filter bottles and water channels, so the product structure is simplified and the manufacturing difficulty is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an exploded view of the water purifier in the embodiment.

[0024] Figure 2 It is a top view of the water purifier in the embodiment.

[0025] Figure 3 for Figure 2 Cross-sectional view of section A.

[0026] Figure 4 for Figure 2 Cross-sectional view of section B.

[0027] Figure 5 It is a stereoscopic view of the central tube of the filter element in the embodiment.

[0028] Figure 6 It is a cross-sectional view of the water purifier in the embodiment.

[0029] Figure 7 It is a schematic diagram of the connection between the center tube of the filter element and the two end covers in the embodiment.

[0030] Figure 8 This is a schematic diagram of the micro-water purification interface and the boosting interface provided on the water purifier in the embodiment.

[0031] Fig. 9 for Figure 8 Cross-sectional view of section C.

[0032] Fig.10 for Figure 8 Cross-sectional view of section D.

[0033] Reference numerals:

[0034] Filter element central tube 1, tube wall 11, partition 12, water channel 101, waste water channel 102, first chamber 103, second chamber 104, middle chamber 105, water inlet hole 106, middle hole 107, first water hole 108, middle channel 109, transition hole 110, bonding area 111, third chamber 112, raw water hole 113, water outlet hole 114;

[0035] First end cap 2, waste water pipe 21, water pipe 22;

[0036] Second end cover 3;

[0037] A first filter material 4 and a first water outlet 40;

[0038] A second filter material 5 and a second water outlet 50;

[0039] Middle filter material 6;

[0040] Shell 7, filter bottle 71, bottle cap 72, clamp 73, joint 700, micro-purification water interface 701, booster interface 702;

[0041] The third end cap 8 , the third filter material 9 , and the fourth end cap 10 . DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0043] Each level of filter material in the existing filter element and water purifier needs to be provided with a pressure-bearing and sealing structure on the shell or the end cover, which makes the filter element structure complex and the manufacturing cost high; at the same time, each level of filter material is arranged on the outside of the central tube and usually needs to be replaced at the same time, but the service life of each level of filter material is not the same. In order to ensure the water purification effect, after the service life of a certain filter material ends, all filter materials need to be replaced at the same time, resulting in a waste of consumables and an increase in the cost of use.

[0044] In order to solve the above technical problems, this embodiment provides a filter core central tube, and its practical new concept is that the water outlet channel is set inside the tube wall, eliminating the corresponding water channel setting, thereby achieving the effect of simplifying the product structure. For details, please refer to Figures 1 to 5 As shown, Figure 1 This is an exploded view of the water purifier in the embodiment. Figure 2 It is a top view of the water purifier in the embodiment, Figure 3 for Figure 2 The cross-sectional view of section A in the figure. Figure 4 for Figure 2 The cross-sectional view of section B in the figure is shown in Figure 1. Figure 5 It is a three-dimensional diagram of the central tube of the filter element in the embodiment.

[0045] The central tube of the filter element of this embodiment includes a tube wall 11, and the inner and outer sides of the tube wall 11 are respectively used to set filter materials; the tube wall 11 is provided with an intermediate channel 109 connecting the inner and outer sides of the tube wall 11, so that the water flow filtered by the filter material on the outer side of the tube wall 11 can flow to the filter material on the inner side of the tube wall 11; the tube wall 11 is provided with a water outlet channel, and the two ends of the water outlet channel are respectively connected to the outer side and the end of the tube wall 11, so that the waste water filtered by the filter material on the outer side of the tube wall 11 can be discharged from the end of the tube wall; or one end of the water outlet channel is connected to the inner side of the tube wall 11, and the other end is connected to the end of the tube wall 11, so that the water filtered by the filter material on the inner side of the tube wall 11 can be discharged from the end of the tube wall.

[0046] When the central tube of the filter element of the above technical solution is working, filter materials are respectively arranged on the inner and outer sides of the tube wall 11, wherein the central tube of the filter element acts as a filter bottle for the inner filter material, and the water can flow from the middle channel 109 to the inner filter material after being filtered by the outer filter material, and the water filtered by the inner filter material can be discharged from the water outlet channel, and the waste water filtered by the outer filter material can be discharged from the water outlet channel. In this way, the central tube of the filter element realizes the function of the water channel through the water outlet channel, so the central tube of the filter element has more diverse functions than the existing central tube; at the same time, the water purification filter element and water purifier using the central tube of the filter element do not need to separately set up filter bottles and water channels, so the product structure is simplified and the manufacturing difficulty is reduced.

[0047] This embodiment provides a filter core central tube 1, which can be applied to a multi-stage filtration water purification filter core and a water purifier, such as Figure 3 As shown, it includes a tube wall 11 and a partition 12. In this embodiment, at least two mutually isolated water outlet channels are provided inside the tube wall 11. One water outlet channel is a wastewater channel 102, and its two ends are respectively connected to the outside and the end of the tube wall 11, so that the wastewater filtered by the filter material on the outside of the tube wall 11 can be discharged from the water outlet channel; the other water outlet channel is a water channel 101, one end of which is connected to the inside of the tube wall 11, and the other end is connected to the end of the tube wall 11, so that the water filtered by the filter material on the inside of the tube wall 11 can be discharged from the water outlet channel.

[0048] like Figure 3 As shown, the tube wall 11 encloses a tube cavity, and the partition 12 is arranged in the tube cavity, and the tube cavity is divided into a first part and a second part. The tube wall 11 forms different chambers to place filter materials of various levels to achieve multi-stage filtration. Specifically, as shown in FIG. Figure 3As shown, the tube wall 11 is detachably connected to the first end cap 2 and the second end cap 3. The first end cap 2 is used to cover the first part of the tube cavity and form a first chamber 103, and the first chamber 103 is provided with a first filter material 4; the second end cap 3 is used to cover the second part of the tube cavity and form a second chamber 104, and the second chamber 104 is provided with a second filter material 5; the outer side of the tube wall 11 and the shell 7 of the water purifier form an intermediate chamber 105, and the intermediate chamber 105 is provided with an intermediate filter material 6 installed on the outer side of the tube wall 11. The first filter material 4 is used to treat raw water and obtain pre-treated water, the intermediate filter material 6 is used to treat pre-treated water and obtain intermediate water and waste water, and the second filter material 5 is used to treat intermediate water and obtain water.

[0049] In order to achieve the orderly flow of the water to be filtered in each chamber and channel, Figure 3 and Figure 4 As shown, the first chamber 103 is provided with a water inlet hole 106 and a middle hole 107. The water inlet hole 106 is used to transport raw water to the first chamber 103, and the middle hole 107 is used to transport pretreated water to the middle chamber 105; the tube wall 11 is provided with a first water hole 108 and a middle channel 109. The first water hole 108 is used to transport wastewater to the wastewater channel 102. The wastewater channel 102 is connected to the outside of the tube wall 11 for outputting wastewater; the middle channel 109 is used to transport intermediate water to the second chamber 104. One end of the water channel 101 is connected to the second chamber 104, and the other end is connected to the end of the tube wall 11 for outputting water.

[0050] When the water purification filter element and the water purifier are working, the filter element central tube 1 of the present embodiment enters the first chamber 103 from the water inlet hole 106, and is filtered by the first filter material 4 to obtain pretreated water. The pretreated water is transported to the middle chamber 105 from the middle hole 107, and is filtered by the middle filter material 6 in the middle chamber 105 to form intermediate water and waste water. Subsequently, the intermediate water is transported to the second chamber 104 from the middle channel 109, and is filtered by the second filter material 5 in the second chamber 104 to obtain water, which is finally output from the water channel 101. At the same time, the waste water enters the waste water channel 102 from the first water hole 108, and is output from the waste water channel 102. Among them, the first filter material 4, the second filter material 5 and the intermediate filter material 6 are respectively arranged in the first chamber 103, the second chamber 104 and the outside of the tube wall 11 of the filter element center tube 1, and can be replaced independently to avoid the waste of consumables caused by synchronous replacement, which is conducive to reducing the use cost; at the same time, compared with the traditional series filter element assembly, the filter element center tube 1 can integrate filter elements at various levels, and the water channel 101 and the wastewater channel 102 are arranged inside the tube wall 11, which is conducive to reducing the product volume; last but not least, the pressure-bearing and sealing structures of filter materials at various levels can be centrally arranged on the filter element center tube 1, without the need to be arranged separately, which greatly simplifies the structure and reduces the manufacturing cost. In summary, the filter element center tube 1 of the above technical solution can realize the independent replacement of filter materials, reduce product volume, simplify product structure and reduce manufacturing cost and use cost, which significantly improves the cost performance and competitiveness of the product.

[0051] It can be understood that in the above technical solution, the first end cover 2, the second end cover 3, the first filter material 4, the second filter material 5, the intermediate filter material 6 and the shell 7 serve as the use environment and conditions of the filter element center tube 1, and are used to illustrate the structure and working mode of the filter element center tube 1.

[0052] In one embodiment of the first chamber 103 and the second chamber 104, see Figure 3 and Figure 4 As shown, the first chamber 103 and the second chamber 104 are arranged in sequence along the axial direction of the lumen.

[0053] Exemplarily, the plate surface of the partition 12 is parallel to the radial direction of the tube cavity, so that the first chamber 103 and the second chamber 104 are cylindrical chambers and are arranged in sequence along the axial direction of the tube cavity.

[0054] In one embodiment of the first chamber 103 conveying pre-treated water to the middle chamber 105 through the middle hole 107, see Figure 3 and Figure 4 As shown, the first end cover 2 is provided with a middle hole 107 , and the first filter material 4 is provided with a first water outlet 40 . The first water outlet 40 is sealed and connected to the inner side of the middle hole 107 and is used to output the pretreated water to the middle chamber 105 .

[0055] For example, see Figure 1 and Figure 3 As shown, the first filter material 4 is a PP carbon fiber filter material and is tubular, with covers at both ends. The covers are fixed to the ends of the PP carbon fiber filter material by bonding or other means. The bottom cover seals one end of the PP carbon fiber filter material, and the top cover is provided with a first water outlet 40. The first water outlet 40 is connected to the inside of the PP carbon fiber filter material. The raw water enters the inside from the outside of the PP carbon fiber filter material to form pretreated water, and the pretreated water enters the intermediate chamber 105 from the first water outlet 40.

[0056] Exemplarily, the first filter material 4 is a filled filter material (not shown), which divides the first chamber 103 into two parts, with the middle hole 107 and the water inlet hole 106 each located in one part. The raw water enters the first chamber 103 from the water inlet hole 106, and after being filtered by the first filter material 4, it directly enters the middle chamber 105 from the middle hole 107 or indirectly enters the middle chamber 105 through the above-mentioned first water outlet 40.

[0057] In one embodiment of the above waste water channel 102 outputting waste water and the water channel 101 outputting water, refer to Figure 1 and Figure 4 As shown, the first end cover 2 is provided with a waste water pipe 21 and a water pipe 22 . The waste water pipe 21 is sealedly connected to the waste water channel 102 to output waste water to the outside of the shell 7 , and the water pipe 22 is sealedly connected to the water channel 101 to output water to the outside of the shell 7 .

[0058] Exemplarily, the waste water pipe 21 and the water pipe 22 are integrally formed on the first end cover 2 .

[0059] For example, see Figure 1 and Figure 4 As shown, the tube wall 11 is provided with a convex portion at one end of the water channel 101 and the wastewater channel 102 close to the first end cover 2. When the first end cover 2 is connected to the tube wall 11, the wastewater pipe 21 and the water pipe 22 are sealed and sleeved on the outside of the convex portion, and a sealing ring is provided between the convex portion to achieve a sealing effect.

[0060] In one embodiment of the above-mentioned detachable connection between the tube wall 11 and the first end cover 2, see Figure 3 As shown, the first end cover 2 is provided with an internal thread, and one end of the tube wall 11 is provided with an external thread. The first end cover 2 is connected to the tube wall 11 through threads, so that it can be fixed on the tube wall 11 or removed from the tube wall 11 by screwing.

[0061] In another embodiment in which the tube wall 11 and the first end cover 2 are detachably connected, the tube wall 11 and the first end cover 2 are connected by means of existing buckles or clamps.

[0062] The first water hole 108 can deliver waste water to the waste water channel 102, and the intermediate channel 109 can deliver intermediate water to the second chamber 104 in the following manner: Figure 3 and Figure 4 As shown, the intermediate filter material 6 is wrapped around the outside of the tube wall 11, the intermediate hole 107 and the first water hole 108 are respectively located on the outside of the two ends of the intermediate filter material 6, and the intermediate channel 109 is located on the inside of the intermediate filter material 6, so that pretreated water can enter the intermediate filter material 6 from one end of the intermediate filter material 6 for filtration, part of the pretreated water enters the inside of the intermediate filter material 6 to obtain intermediate water, and is transported to the second chamber 104 from the intermediate channel 109, and the other pretreated water flows to the outside of the other end of the intermediate filter material 6 to form wastewater, and is transported to the wastewater channel 102 from the first water hole 108.

[0063] For example, see Figure 3 , Figure 4 and Figure 5 As shown, the middle filter material 6 is a reverse osmosis membrane, and the two ends of the reverse osmosis membrane are bonded to the tube wall 11 by an existing gluing method. The bonding area 111 is annular, and the middle channel 109 is located inside the middle filter material 6 and between the two annular bonding areas 111. The middle hole 107 and the first water hole 108 are located outside the bonding area 111. In an embodiment in which one end of the water channel 101 is connected to the second chamber 104, refer to Figure 4 As shown, the partition 12 is integrally formed with the inner side of the tube wall 11 and is provided with a transition hole 110, which connects the water channel 101 and the second chamber 104; the second filter material 5 is provided with a second water outlet 50, which is sealed and connected to the inner side of the transition hole 110 and is used to transport water to the water channel 101.

[0064] For example, see Figure 1 and Figure 4 As shown, the second filter material 5 is a mouthfeel carbon in a tubular shape with lids at both ends, which are fixed to the ends of the PP carbon fiber filter material by bonding or the like, the bottom lid covers one end of the mouthfeel carbon, the top lid is provided with a second water outlet 50, the second water outlet 50 is connected to the inside of the mouthfeel carbon, and the intermediate water enters the inside from the outside of the mouthfeel carbon to form water, wherein the mouthfeel carbon has the function of improving the taste.

[0065] The filter element center tube 1 of the above technical solution also has the following advantages: the first filter material 4 and the second filter material 5 are respectively arranged in the first chamber 103 and the second chamber 104, and are arranged along the axial direction of the tube cavity, and the middle filter material 6 is coated on the outside of the tube wall 11. The filter element obtained in this way has a small radial dimension. At the same time, the filtration water pressure of each level of filter material will not gradually decrease due to the traditional concentric circle filtration structure, which is conducive to ensuring the filtration effect.

[0066] This embodiment provides a filter core center tube, see Figure 6As shown, Figure 6 : is a cross-sectional view of the water purifier in the embodiment, including a tube wall 11, and is provided with a water outlet channel and an intermediate channel 109. The tube wall 11 encloses a tube cavity, and the water outlet channel is a wastewater channel 102, and its two ends are respectively connected to the outer side and the end of the tube wall 11; the tube wall 11 is used to detachably connect the third end cover 8, the third end cover 8 is used to seal the tube cavity and form a third chamber 112, and the outer side of the tube wall 11 and the shell 7 of the water purifier form an intermediate chamber 105; the intermediate chamber 105 is provided with a raw water hole 113 for introducing raw water, and an intermediate filter material 6 installed on the outer side of the tube wall 11, the intermediate filter material 6 is used to treat the raw water and obtain intermediate water and wastewater, the intermediate water enters the third chamber 112 through the intermediate channel 109, and the wastewater is output through the wastewater channel 102; the third chamber 112 is provided with a third filter material 9, the third filter material 9 is used to treat the intermediate water and obtain water, and the third chamber 112 is provided with a water outlet hole 114 for outputting water.

[0067] For example, see Figure 7 As shown, Figure 7 It is a schematic diagram of the connection between the two end caps of the center tube of the filter element in the embodiment. The tube wall 11 is detachably connected to the fourth end cap 10 at the opposite end of the third end cap 8 by means of a threaded connection or the like. The fourth end cap 10 is provided with a pipe connected to the wastewater channel 102 and the water outlet 114. The pipe is used to output wastewater and water to the outside of the water purifier.

[0068] Exemplarily, the raw water hole 113 is disposed on the housing 7 of the water purifier, such as on the bottle cap 72 of the housing 7 .

[0069] Exemplarily, the middle filter material 6 is an RO membrane, and the third filter material 9 is mouthfeel carbon.

[0070] Exemplarily, the water outlet channel extends along the axial direction of the tube wall 11 .

[0071] This embodiment provides a water purification filter element, see Figure 1 and Figure 3 As shown, it includes the filter core central tube 1 mentioned above, and also includes a first end cap 2, a second end cap 3, a first filter material 4, a second filter material 5 and an intermediate filter material 6; or refer to Figure 6 As shown, it also includes a third end cap 8, an intermediate filter material 6 and a third filter material 9.

[0072] This embodiment provides a water purifier, see Figure 1 and Figure 3 As shown, it includes the above-mentioned water purification filter element and also includes a housing 7. In one embodiment of the above-mentioned housing 7, refer to Figure 1 and Figure 3As shown, the shell 7 includes a filter bottle 71 and a bottle cap 72, the filter bottle 71 and the bottle cap 72 are detachably connected, and the water purification filter element is detachably arranged inside the filter bottle 71; the bottle cap 72 is provided with three connectors 700 that are respectively connected to the water inlet hole 106, the water channel 101 and the wastewater channel 102.

[0073] For example, see Figure 1 and Figure 3 As shown, the filter bottle 71 and the bottle cap 72 are connected by a pair of clamps 73 to achieve fixation and detachability; or, the filter bottle 71 and the bottle cap 72 are detachably connected by an existing snap-fit ​​structure.

[0074] Exemplarily, when the bottle cap 72 is connected to the filter bottle 71 , the three connectors 700 are sleeved on the water pipe 22 , the waste water pipe 21 and the water inlet 106 of the first end cap 2 .

[0075] See the following content Figure 8 , Fig. 9 and Fig.10 As shown, Figure 8 This is a schematic diagram of the water purifier in the embodiment provided with a micro-water purification interface and a boosting interface. Fig. 9 for Figure 8 The cross-sectional view of section C in the figure. Fig.10 for Figure 8 Cross-sectional view of section D.

[0076] Exemplarily, a micro-purified water interface 701 is also provided on the bottle cap 72, which is connected to the middle hole 107 through a pipeline for outputting pretreated water. The micro-purified water interface 701 can be opened as needed and can be suitable for situations where the raw water quality is good or the output water quality requirements are low.

[0077] Exemplarily, a boost interface 702 is also provided on the bottle cap 72, which is connected to the middle chamber 105 and is used to connect a power source such as a pump. The boost interface 702 can be opened as needed to increase the pressure in the middle chamber 105 through the pump to improve the filtering efficiency of the middle filter material 6.

[0078] Exemplarily, when the boost interface 702 and the micro-purified water interface 701 are provided on the bottle cap 72 at the same time, the boost interface 702 and the micro-purified water interface 701 can be connected through a pipeline when idle, and the water purifier can also operate normally.

[0079] Although the embodiments of the present invention have been shown and described, it will be understood 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 the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter core central tube, characterized in that: It comprises a tube wall, wherein the inner side and the outer side of the tube wall are respectively used for setting filter materials; The tube wall is provided with an intermediate channel connecting the inside and outside of the tube wall, so that the water flow filtered by the filter material on the outside of the tube wall can flow to the filter material on the inside of the tube wall; A water outlet channel is provided inside the tube wall, and the two ends of the water outlet channel are respectively connected to the outside and the end of the tube wall, so that the waste water filtered by the filter material outside the tube wall can be discharged from the end of the tube wall; Or one end of the water outlet channel is connected to the inner side of the tube wall, and the other end is connected to the end of the tube wall, so that the water filtered by the filter material inside the tube wall can be discharged from the end of the tube wall.

2. The filter core center tube according to claim 1, characterized in that: The tube wall is provided with at least two mutually isolated water outlet channels, wherein two ends of one water outlet channel are respectively connected to the outside and the end of the tube wall, so that the waste water filtered by the filter material on the outside of the tube wall can be discharged from the water outlet channel; one end of the other water outlet channel is connected to the inside of the tube wall, and the other end is connected to the end of the tube wall, so that the water filtered by the filter material on the inside of the tube wall can be discharged from the water outlet channel.

3. The filter core center tube according to claim 2, characterized in that: The central tube of the filter element includes a partition, the tube wall encloses a tube cavity, the partition is arranged in the tube cavity and divides the tube cavity into a first part and a second part, and the water outlet channel includes a water channel and a wastewater channel isolated from each other; The tube wall is used to detachably connect a first end cap and a second end cap, the first end cap is used to cover a first part of the tube cavity and form a first chamber, and the second end cap is used to cover a second part of the tube cavity and form a second chamber; the outer side of the tube wall and the shell of the water purifier form an intermediate chamber; The first chamber is provided with a first filter material, and is provided with a water inlet hole and a middle hole, the water inlet hole is used to transport raw water to the first chamber, the first filter material is used to treat the raw water and obtain pre-treated water, and the middle hole is used to transport the pre-treated water to the middle chamber; The intermediate chamber is provided with an intermediate filter material installed on the outside of the tube wall, the intermediate filter material is used to process the pre-treated water and obtain intermediate water and wastewater, and the two ends of the wastewater channel are respectively connected to the outside and the end of the tube wall for outputting wastewater; The intermediate channel is used to transport intermediate water to the second chamber. The second chamber is provided with a second filter material, which is used to process the intermediate water and obtain water. One end of the water channel is connected to the inner side of the tube wall, and the other end is connected to the end of the tube wall for outputting water.

4. The filter core center tube according to claim 3, characterized in that: The first end cover is provided with the middle hole, and the first filter material is provided with a first water outlet nozzle, which is sealed and connected to the inner side of the middle hole and is used to output pretreated water to the middle chamber.

5. The filter core center tube according to claim 3, characterized in that: The first end cover is provided with a waste water pipe, a water pipe and the water inlet hole. The waste water pipe is sealed and connected with the waste water channel to output waste water to the outside of the shell. The water pipe is sealed and connected with the water channel to output water to the outside of the shell.

6. The filter core center tube according to claim 3, characterized in that: The intermediate filter material is wrapped around the outside of the tube wall, the intermediate hole and the entrance of the wastewater channel are respectively located on the outside of both ends of the intermediate filter material, the intermediate channel is located on the inside of the intermediate filter material, the intermediate filter material is a reverse osmosis membrane, both ends of the reverse osmosis membrane are bonded to the tube wall, the intermediate channel is located between two bonding areas, and the intermediate hole and the entrance of the wastewater channel are located outside the bonding area.

7. The filter core center tube according to claim 3, characterized in that: The partition is integrally formed with the inner side of the tube wall and is provided with a transition hole, wherein the transition hole communicates with the water channel and the second chamber; The second filter material is provided with a second water outlet nozzle, which is sealed and connected to the inner side of the transition hole and is used for conveying water to the water channel.

8. The filter core center tube according to claim 1, characterized in that: The tube wall encloses a tube cavity, the water outlet channel is a wastewater channel, and the two ends of the wastewater channel are respectively connected to the outside and the end of the tube wall; The tube wall is used for detachably connecting the third end cap, and the third end cap is used to cover the tube cavity and form a third chamber; the outer side of the tube wall and the shell of the water purifier form an intermediate chamber; the intermediate chamber is provided with a raw water hole for introducing raw water, and an intermediate filter material installed on the outer side of the tube wall, and the intermediate filter material is used to process the raw water and obtain intermediate water and waste water, the intermediate water enters the third chamber through the intermediate channel, and the waste water is output through the waste water channel; The third chamber is provided with a third filter material, the third filter material is used to process the intermediate water and obtain water, and the third chamber is provided with a water outlet for outputting the water.

9. A water purification filter element, characterized in that: A filter element central tube comprising the filter element central tube as described in any one of claims 1 to 8.

10. A water purifier, characterized in that: The water purification filter element according to claim 9 also includes the shell.

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