Filter element and water purifier

Abstract

The filter element comprises a central pipe, the central pipe is provided with a first water inlet flow channel, and the first water inlet flow channel is used for being communicated with raw water; the membrane element is provided with a second water inlet flow channel for containing wastewater, one end of the second water inlet flow channel is communicated with the first water inlet flow channel, the other end of the second water inlet flow channel is used for being communicated with a wastewater device, the membrane element is provided with at least one membrane bag, and the membrane bag is provided with a first pure water outlet flow channel for containing pure water; the first pure water outlet flow channel extends in the length direction of the membrane bag, and the membrane bag is wound around the central pipe in the length direction of the membrane bag. According to the filter element, due to the fact that the first pure water outlet flow channel extends in the length direction of the membrane bag, the first pure water outlet flow channel is large in capacity and can contain more pure water, under the same solute, the solvent is large, the concentration is low, the TDS value of the first cup of water can be reduced, the taste of the first cup of water is better, and meanwhile the water quality is improved. And the forward osmosis phenomenon is not easy to occur when the filter element stands, so that the cleanliness of pure water is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of filter element structures, and in particular to a filter element and a water purifier. Background Art

[0002] As a household water purification device, the core component of a water purifier is the filter element, which mainly includes a central tube, a membrane element and a membrane shell. The membrane element is wound on the central tube. The membrane element is composed of multiple membrane pages. The membrane shell is wrapped around the outer circumference of the membrane element. The more critical ones are the membrane pages, as well as the water inlet channel and pure water outlet channel arranged on both sides of the membrane pages.

[0003] During use, raw water flows into the inlet channel, is filtered through the membrane bag's reverse osmosis process, and becomes pure water, which then flows out through the outlet channel. However, in existing filter cartridges, since pure water flows through the outlet channel and then exits the central tube, this structure results in a smaller outlet channel volume and a smaller pure water capacity when standing still. For the same solute, a smaller solvent concentration results in a higher concentration, resulting in a higher TDS in the first glass of water, affecting the taste. Utility Model Content

[0004] The present application provides a filter element and a water purifier to solve the problems existing in the related art. The technical solution is as follows:

[0005] In a first aspect, an embodiment of the present application provides a filter element, comprising

[0006] A central pipe having a first water inlet channel for communicating with raw water;

[0007] A membrane element, wherein the membrane element has a second water inlet channel for accommodating wastewater, one end of the second water inlet channel is connected to the first water inlet channel, and the other end of the second water inlet channel is used to communicate with a wastewater device. The membrane element is provided with at least one membrane bag, and the membrane bag has a first pure water outlet channel for accommodating pure water, and the first pure water outlet channel extends along the length direction of the membrane bag, and the membrane bag is wound on the central tube along its length direction.

[0008] In one embodiment, the film bag comprises:

[0009] Two film pages, the two film pages are folded in half to form a fold between them, and the fold is located on one side of the film page;

[0010] In the two membrane pages of the same membrane bag, the adjacent two sides or the opposite two sides of the remaining side edges of one of the membrane pages are provided with sealing strips, and each sealing strip connects the opposite two sides on the two adjacent membrane pages together one by one to enclose the first pure water outlet channel.

[0011] In one embodiment, the fold is located on a first side edge in the length direction of the film bag;

[0012] The sealing strip comprises:

[0013] a first sealing strip, the first sealing strip being located on the second side edge of the film bag in the longitudinal direction, the first sealing strip connecting the second side edges of the two film pages to seal the second side edges of the two film pages together;

[0014] a second sealing strip, the second sealing strip being located on the third side of the film bag in the width direction, the second sealing strip connecting the third sides of the two film pages to seal the third sides of the two film pages together;

[0015] The fourth side edges of the two film leaves in the width direction are connected to the outer peripheral wall of the central tube and are covered by the film bag.

[0016] In one embodiment, the number of the membrane bags is at least two, two adjacent membrane bags form the second water inlet channel, and the ends of the two adjacent membrane bags having the fold are separated from each other.

[0017] In one embodiment, the membrane element has one end of the first sealing strip located on a side close to the water inlet of the first water inlet channel;

[0018] The filter element further comprises:

[0019] The first end cover is sleeved on one end of the membrane element having the first sealing strip, and a second pure water outlet flow channel is formed between the first end cover and the membrane element, and the second pure water outlet flow channel is connected to the first pure water outlet flow channel.

[0020] In one embodiment, the end of the membrane element having the fold has a wastewater outlet, and the wastewater outlet is connected to the second water inlet channel and the wastewater device.

[0021] In one embodiment, the fold is located on a first side edge in the width direction of the film bag;

[0022] The sealing strip comprises:

[0023] a first sealing strip, the first sealing strip being located on the second side edge of the film bag in the longitudinal direction, the first sealing strip connecting the second side edges of the two film pages to seal the second side edges of the two film pages together;

[0024] a second sealing strip, the second sealing strip being located on the third side of the film bag in the length direction, the second sealing strip connecting the third sides of the two film pages to seal the third sides of the two film pages together;

[0025] The membrane bag has a side edge with the fold connected to the outer peripheral wall of the central tube and is covered by the membrane bag;

[0026] The fourth side edges of the two membrane pages in the width direction are exposed on the outer peripheral wall of the membrane element and connected to the outer peripheral wall of the membrane element.

[0027] In one embodiment, the number of the membrane bags is at least two, two adjacent membrane bags form the second water inlet channel, and the ends of the two adjacent membrane bags having the fold are separated from each other.

[0028] In one embodiment, the membrane element has one end of the first sealing strip located on a side close to the water inlet of the first water inlet channel;

[0029] The filter element further comprises:

[0030] a second end cap, the second end cap being sleeved on one end of the membrane element having the first sealing strip, the second end cap and the membrane element forming a wastewater outlet flow channel, the wastewater outlet flow channel being connected to the second water inlet flow channel and the wastewater device;

[0031] a third end cap, the third end cap being sleeved on the end of the membrane element having the second sealing strip;

[0032] A binding element is located between the second end cover and the third end cover, and the binding element is covered on the outer peripheral wall of the membrane element.

[0033] In a second aspect, an embodiment of the present application provides a water purifier comprising the above-mentioned filter element.

[0034] The advantages or beneficial effects of the above technical solution include at least:

[0035] The filter element of the present invention has a large volume because the first pure water outlet flow channel extends along the length direction of the membrane bag, and the first pure water outlet flow channel has a large capacity, and can accommodate more pure water. Under the same solute, the solvent is larger and the concentration is lower, thereby reducing the TDS value of the first cup of water, making the first cup of water taste better. At the same time, it can also make the filter element less likely to have forward osmosis when it is stationary, effectively reducing the probability of raw water flowing from the second water inlet flow channel to the first pure water outlet flow channel, and ensuring the cleanliness of the pure water.

[0036] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0038] Figure 1 This is a schematic diagram of the three-dimensional structure of the filter element of the first embodiment of the present utility model;

[0039] Figure 2 for Figure 1 A cross-sectional view of the filter element in FIG.

[0040] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the membrane element;

[0041] Figure 4 for Figure 1 Exploded view of the filter element in

[0042] Figure 5 for Figure 1 Schematic diagram of the filter element assembly;

[0043] Figure 6 This is a schematic diagram of the three-dimensional structure of the filter element of the second embodiment of the present utility model;

[0044] Figure 7 for Figure 6 A cross-sectional view of the filter element in FIG.

[0045] Figure 8 for Figure 6 Schematic diagram of the three-dimensional structure of the membrane element;

[0046] Figure 9 for Figure 6 Exploded view of the filter element in

[0047] Figure 10 for Figure 6 Assembly diagram of the filter element.

[0048] Reference numerals

[0049] 1. Central tube; 11. First water inlet channel; 2. Membrane element; 21. Second water inlet channel; 22. Membrane bag; 221. First pure water outlet channel; 222. Membrane leaf; 223. Crease; 224. First sealing strip; 225. Second sealing strip; 23. Guide cloth; 3. First end cap; 4. Second pure water outlet channel; 5. Second end cap; 6. Wastewater outlet channel; 7. Third end cap; 8. Bundling element; 9. Partition. DETAILED DESCRIPTION

[0050] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0051] See also Figures 1-10 , shows a filter element of a preferred embodiment of the utility model, including

[0052] The central tube 1 has a first water inlet channel 11, and the first water inlet channel 11 is used to communicate with raw water, wherein the raw water can be tap water or purified water;

[0053] The membrane element 2 has a second water inlet channel 21 for accommodating wastewater, one end of the second water inlet channel 21 is connected to the first water inlet channel 11, and the other end of the second water inlet channel 21 is used to communicate with the wastewater device so that the wastewater can flow to the wastewater device. The membrane element 2 is provided with at least one membrane bag 22, and the membrane bag 22 has a first pure water outlet channel 221 for accommodating pure water. The first pure water outlet channel 221 extends along the length direction of the membrane bag 22, and the membrane bag 22 is wound on the central tube 1 along its length direction. During filtration, raw water enters from the first water inlet channel 11 and flows to the second water inlet channel 21. The raw water in the second water inlet channel 21 passes through the membrane page 222 under the reverse osmosis action of the membrane page 222 to form pure water. At the same time, the raw water in the second water inlet channel 21 forms wastewater. The pure water enters the first pure water outlet channel 221 and is then discharged from the outlet end of the first pure water outlet channel 221, and the wastewater is discharged to the wastewater device.

[0054] The filter element of the present invention has a large volume because the first pure water outlet flow channel 221 extends along the length direction of the membrane bag 22. Therefore, the first pure water outlet flow channel 221 has a large capacity and can accommodate more pure water. Under the same solute, the solvent is larger and the concentration is lower, thereby reducing the TDS value of the first cup of water and making the first cup of water taste better. At the same time, it can also make the filter element less likely to have forward osmosis when it is stationary, effectively reducing the probability of raw water flowing from the second water inlet flow channel 21 to the first pure water outlet flow channel 221, and ensuring the cleanliness of pure water.

[0055] Among them, the TDS (TDS refers to the total dissolved solids) value of water refers to the solid residue obtained after the water is filtered and dried at a certain temperature. It mainly includes non-volatile soluble salts, organic matter and insoluble particles that can pass through the filter, etc., also known as filterable solids or filterable residue.

[0056] See also Figure 3 and Figure 8 In one embodiment, the membrane bag 22 includes:

[0057] Two film pages 222 are folded in half to form a fold 223 therebetween. The fold 223 is located on one side of the film page 222.

[0058] In the two membrane pages 222 of the same membrane bag 22, the adjacent two sides or the opposite two sides of the remaining sides of one of the membrane pages 222 are provided with sealing strips, and each sealing strip connects the opposite two sides on the two adjacent membrane pages 222 together one by one to enclose the first pure water outlet channel 221 and form a membrane bag 22 with a bag-like structure. Compared with the structure of the prior art in which two completely separated membrane pages 222 are connected together by three sealing strips, the membrane bag 22 only needs to set the first sealing strip 224 and the second sealing strip 225 on one of the membrane pages 222, and the membrane bag 22 is formed by folding two membrane pages 222 and then connecting them through sealing strips. The crease 223 replaces one sealing strip, so that the membrane bag 22 only needs to set two sealing strips to form a relatively closed structure, reducing one sealing strip and avoiding the waste of membrane area caused by setting a sealing strip at the crease 223. The effective area of ​​the membrane page 222 is increased from the original 75% to 85%, thereby increasing the effective area of ​​the membrane page 222, thereby improving the filtration efficiency and filtration performance, and at the same time, it can also reduce costs.

[0059] In one embodiment, the second water inlet channel 21 and the first pure water outlet channel 221 are respectively placed on the outer and inner sides of the membrane page 222, that is, the second water inlet channel 21 is located on the outer side of the membrane page 222, and is surrounded by two adjacent membrane bags 22, and the first pure water outlet channel 221 is located on the inner side of the membrane page 222, and is surrounded by the inner sides of two relatively folded membrane pages 222, so that the raw water in the second water inlet channel 21 passes through the membrane page 222 and enters the first pure water outlet channel 221 to form pure water.

[0060] See also Figure 1-Figure 5 In one embodiment, in order to arrange the first pure water outlet channel 221 along the length direction of the membrane bag 22, the fold 223 is located on the first side of the membrane bag 22 in the length direction;

[0061] Sealing strips include:

[0062] The first sealing strip 224 is located on the second side of the film bag 22 in the length direction, that is, the first sealing strip 224 and the fold 223 are respectively located on both sides of the width direction of the film bag 22. The first sealing strip 224 connects the second side edges of the two film leaves 222 to seal the second side edges of the two film leaves 222 in the same film bag 22 together;

[0063] The second sealing strip 225 is located on the third side of the membrane bag 22 in the width direction. The second sealing strip 225 connects the third sides of the two membrane pages 222 to seal the third sides of the two membrane pages 222 in the same membrane bag 22 together, thereby forming a membrane bag 22 with a first pure water outlet flow channel 221, and the first pure water outlet flow channel 221 extends along the length direction of the membrane bag 22;

[0064] The fourth side of the two membrane pages 222 in the width direction is connected to the outer peripheral wall of the central tube 1 and is covered by the membrane bag 22, that is, the end of the membrane bag 22 with the membrane bag opening is connected to the outer peripheral wall of the central tube 1 and is covered by the membrane bag 22, so that the end of the membrane bag 22 with the membrane bag opening can be connected to the central tube 1, realizing a sealant-free sealing membrane bag opening, which plays a role in isolating pure water and raw water, and preventing the raw water in the first water inlet channel 11 on the central tube 1 from flowing to the first pure water outlet channel 221 through the membrane bag opening, which is beneficial to further improve the TDS value of the first cup of water. At the same time, it can further save sealing strips, thereby further improving the filtration efficiency and reducing costs.

[0065] See also Figure 4 In one embodiment, the number of membrane bags 22 is at least two, and two adjacent membrane bags 22 form the above-mentioned second water inlet channel 21. The ends of the two adjacent membrane bags 22 with the fold 223 are separated from each other, so that the ends of the two adjacent membrane bags 22 with the fold 223 do not need to be connected with sealing strips. At the same time, the first membrane page 222 and the last membrane page 222 of the membrane element 2 do not need to be connected with sealing strips, which can further increase the effective area of ​​the membrane page 222, thereby further improving the filtration efficiency and reducing costs.

[0066] See also Figure 1-Figure 2 In one embodiment, one end of the membrane element 2 having the first sealing strip 224 is located on a side close to the water inlet of the first water inlet channel 11;

[0067] The filter also includes:

[0068] The first end cap 3 is sleeved on the end of the membrane element 2 having the first sealing strip 224. The first end cap 3 and the membrane element 2 enclose a second pure water outlet flow channel 4, which is connected to the first pure water outlet flow channel 221. On the one hand, the provision of the first end cap 3 plays a role in supporting and fixing the membrane element 2, so that the membrane element 2 can be reliably provided on the central tube 1 according to the set winding method. On the other hand, the provision of the second pure water outlet flow channel 4 can increase the pure water capacity, making it less likely for the filter element to undergo forward osmosis when it is stationary, which is beneficial for further improving the TDS value of the first cup of water. In addition, since the second pure water outlet flow channel 4 is located on the end of the central tube 1 having the water inlet, the second pure water outlet flow channel 4 and the water inlet are both converged at the same end of the central tube 1, thereby facilitating the aggregation of the external pure water connector and the raw water connector at the same end of the central tube 1, thereby avoiding dispersion and excessive space occupation.

[0069] In one embodiment, a first sealing connection structure is provided between the first end cover 3 and the membrane element 2, and the first sealing connection structure connects the first end cover 3 and the membrane element 2 together to form a second pure water outlet channel 4 with one end closed and the other end open.

[0070] In one embodiment, the first sealing connection structure is a sealant. In other embodiments, the first sealing connection structure is a sealing structure such as a sealing ring.

[0071] See also Figure 2 In one embodiment, the membrane element 2 has a wastewater outlet (not shown in the figure) at one end having the fold 223. The wastewater outlet is connected to the second water inlet channel 21 and the wastewater device so that the wastewater is discharged from the other end of the central tube 1. At the same time, since the wastewater outlet and the pure water outlet of the second pure water outlet channel 4 are respectively arranged at the axial ends of the membrane element 2, the distance between the pure water outlet and the wastewater outlet is lengthened, which can effectively isolate the pure water and wastewater, thereby further reducing the TDS value of the first cup of water.

[0072] See also Figures 6-10 In one embodiment, in order to arrange the first pure water outlet channel 221 along the length direction of the membrane bag 22, the fold 223 is located on the first side of the membrane bag 22 in the width direction;

[0073] Sealing strips include:

[0074] The first sealing strip 224 is located on the second side of the film bag 22 in the longitudinal direction, that is, the first sealing strip 224 and the fold 223 are respectively located on two adjacent sides of the film bag 22. The first sealing strip 224 connects the second side edges of the two film leaves 222 to seal the second side edges of the two film leaves 222 of the same film bag 22 together;

[0075] The second sealing strip 225 is located on the third side of the membrane bag 22 in the longitudinal direction. The second sealing strip 225 connects the third sides of the two membrane pages 222 to seal the third sides of the two membrane pages 222 of the same membrane bag 22 together, thereby forming a membrane bag 22 with a first pure water outlet channel 221, and the first pure water outlet channel 221 extends along the longitudinal direction of the membrane bag 22;

[0076] The membrane bag 22 has a side edge with a fold 223 that is connected to the outer peripheral wall of the central tube 1 and is covered by the membrane bag 22, so that the side of the membrane bag 22 with the fold 223 is sealed without sealant, which can effectively isolate pure water and raw water, and prevent the raw water in the first water inlet channel 11 on the central tube 1 from flowing to the first pure water outlet channel 221 through the side of the membrane bag 22 with the fold 223, which is beneficial to further improve the TDS value of the first cup of water. At the same time, it can also save sealant, which is beneficial to further improve the filtration efficiency and reduce costs;

[0077] The fourth side edges of the two membrane leaves 222 in the width direction are exposed on and connected to the outer peripheral wall of the membrane element 2 to prevent the end of the membrane element 2 away from the fold 223 from being detached, so that the membrane element 2 can be reliably wound on the central tube 1.

[0078] See also Figure 8 In one embodiment, the number of membrane bags 22 is at least two, and two adjacent membrane bags 22 form a second water inlet channel 21. The ends of the two adjacent membrane bags 22 with the fold 223 are separated from each other, so that the ends of the two adjacent membrane bags 22 with the fold 223 do not need to be connected with a sealing strip. At the same time, the first membrane page 222 and the last membrane page 222 of the membrane element 2 do not need to be connected with a sealing strip, which can further increase the effective area of ​​the membrane page 222, thereby further improving the filtration efficiency and reducing costs.

[0079] See also Figure 6 and Figure 7 In one embodiment, one end of the membrane element 2 having the first sealing strip 224 is located on a side close to the water inlet of the first water inlet channel 11;

[0080] The filter also includes:

[0081] The second end cap 5 is sleeved on the end of the membrane element 2 having the first sealing strip 224. The second end cap 5 and the membrane element 2 form a wastewater outlet channel 6, which is connected to the second water inlet channel 21 and the wastewater device;

[0082] A third end cap 7, which is sleeved on one end of the membrane element 2 having the second sealing strip 225;

[0083] The binding element 8 is located between the second end cover 5 and the third end cover 7 , and is covered on the outer peripheral wall of the membrane element 2 . On the one hand, the setting of the second end cap 5 plays a role in supporting and fixing the membrane element 2, so that the membrane element 2 can be reliably arranged on the central tube 1 according to the set winding method. On the other hand, since the wastewater outlet channel 6 is located on the end close to the central tube 1 with the water inlet, the wastewater outlet channel 6 and the water inlet are both converged at the same end of the central tube 1, thereby facilitating the gathering of the external wastewater joint and the raw water joint at the same end of the central tube 1 to avoid dispersion and excessive occupation of space; similarly, the setting of the third end cap 7 plays a role in supporting and fixing the membrane element 2, so that the membrane element 2 can be more reliably wound on the central tube 1; and the binding element 8 can connect the fourth side edges of the two membrane pages 222 and the outer peripheral wall of the membrane element 2 together to prevent the membrane element 2 from detaching at the end away from the fold 223, so that the membrane element 2 can be reliably wound on the central tube 1. At the same time, it can also strengthen the connection reliability between the membrane element 2 and the central tube 1, and the structural reliability is higher.

[0084] In one embodiment, a second sealing connection structure is provided between the second end cover 5 and the membrane element 2, and the second sealing connection structure connects the second end cover 5 and the membrane element 2 together to form a wastewater outlet channel 6 with one end closed and the other end open.

[0085] In one embodiment, the second sealing connection structure is a sealant. In other embodiments, the second sealing connection structure is a sealing structure such as a sealing ring.

[0086] In one embodiment, a third sealing connection structure is provided between the third end cap 7 and the membrane element 2 , and the third sealing connection structure connects the third end cap 7 and the membrane element 2 together.

[0087] In one embodiment, the third sealing connection structure is a sealant. In other embodiments, the third sealing connection structure is a sealing structure such as a sealing ring.

[0088] See also Figure 3 and Figure 8 In one embodiment, a guide cloth 23 is provided on the membrane bag 22. The guide cloth 23 is provided in the first pure water outlet flow channel 221 and is located between the two membrane pages 222. Since the guide cloth 23 is placed in the first pure water outlet flow channel 221, the guide cloth 23 can be used to guide water in the first pure water outlet flow channel 221, which is conducive to improving the pure water output rate. At the same time, the guide cloth 23 can be used to separate the two membrane pages 222 in the same membrane bag 22, preventing the two membrane pages 222 from sticking together and preventing the raw water from passing through the membrane pages 222 and forming pure water in the first pure water outlet flow channel 221, ensuring that the raw water can be filtered.

[0089] See also Figure 3 and Figure 8In one embodiment, in each film bag 22, the guide cloth 23 is attached to the inner wall of one of the film pages 222, and the first sealing strip 224 and the second sealing strip 225 are both arranged on the side wall of the guide cloth 23 opposite to the inner wall of the other film page 222, so that the first sealing strip 224 and the second sealing strip 225 can be used to connect the guide cloth 23 and the two film pages 222 together at the same time. The connection structure is simple and has high reliability. At the same time, it can also play a positioning role for the guide cloth 23 to avoid the guide cloth 23 being displaced and causing the two film pages 222 to stick together.

[0090] In one embodiment, the guide cloth 23 has a thickness of 0.2-0.35 mm, to avoid being too thin to guide and isolate the water, and to avoid being too thick to increase the difficulty of winding the membrane element 2 .

[0091] In one embodiment, the guide cloths 23 are arranged on the membrane in a spacer arrangement, that is, two adjacent guide cloths 23 are spaced apart in the length direction of the membrane.

[0092] See also Figure 4 、 Figure 5 、 Figure 9 and Figure 10 In one embodiment, the filter element further includes a partition net 9, which is arranged between two adjacent membrane bags 22, that is, the partition net 9 is arranged in the second water inlet channel 21, so as to isolate the two adjacent membrane bags 22 and prevent the two adjacent membrane bags 22 from sticking together, thereby ensuring that the filter element can filter the raw water normally.

[0093] In one embodiment, a spacer net 9 is also attached to the outer side of the membrane bag 22 closest to the outer peripheral wall of the central tube 1 to prevent the outer side of the membrane bag 22 closest to the central tube 1 from adhering to the outer peripheral wall of the central tube 1.

[0094] In one embodiment, the number of membrane elements 2 can be one or two or more. When there are two or more membrane elements 2, the two or more membrane elements 2 are stacked together in sequence, and the ends of the two adjacent membrane elements 2 close to the central tube 1 are connected together by gluing on both sides to reduce the glue area and increase the effective area of ​​the membrane page 222. The two adjacent membrane elements 2 are separated by a partition 9 to prevent the two adjacent membrane elements 2 from sticking together, and a second water inlet channel 21 is formed between the two adjacent membrane elements 2 to further increase the effective area of ​​the membrane page 222, which is conducive to further improving the filtration efficiency.

[0095] An embodiment of the present utility model further provides a water purifier, comprising the above-mentioned filter element.

[0096] The water purifier of the present invention, due to the adoption of the above-mentioned filter element, can also play the role of reducing the TDS value of the first cup of water.

[0097] In the description of this specification, the reference terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0098] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0099] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A filter element, characterized in that: include A central tube, wherein the central tube has a first water inlet flow channel, and the first water inlet flow channel is used to communicate with raw water; A membrane element, wherein the membrane element has a second water inlet channel for accommodating waste water, one end of the second water inlet channel is connected to the first water inlet channel, and the other end of the second water inlet channel is used to communicate with a waste water device, and the membrane element is provided with at least one membrane bag, and the membrane bag has a first pure water outlet channel for accommodating pure water, and the first pure water outlet channel extends along the length direction of the membrane bag, and the membrane bag is wound on the central tube along its length direction.

2. The filter element according to claim 1, characterized in that: The film bag comprises: Two film pages, the two film pages are folded in half to form a fold between them, and the fold is located on one side of the film page; In the two membrane pages of the same membrane bag, two adjacent sides or two opposite sides of the remaining sides of one of the membrane pages are provided with sealing strips, and each sealing strip connects the two opposite sides on the two adjacent membrane pages together one by one to enclose the first pure water outlet flow channel.

3. The filter element according to claim 2, characterized in that: The fold is located on a first side edge in the length direction of the film bag; The sealing strip comprises: A first sealing strip, wherein the first sealing strip is located on the second side edge of the film bag in the length direction, and the first sealing strip connects the second side edges of the two film pages to seal and connect the second side edges of the two film pages together; A second sealing strip, the second sealing strip is located on the third side of the film bag in the width direction, and the second sealing strip connects the third sides of the two film pages to seal the third sides of the two film pages together; The fourth side edges of the two film leaves in the width direction are connected to the outer peripheral wall of the central tube and are covered by the film bag.

4. The filter element according to claim 3, characterized in that: The number of the membrane bags is at least two, two adjacent membrane bags surround the second water inlet channel, and two adjacent membrane bags are disposed separately at one end having the fold.

5. The filter element according to claim 3, characterized in that: The membrane element has one end of the first sealing strip located on one side close to the water inlet of the first water inlet channel; The filter element also includes: A first end cover is sleeved on one end of the membrane element having the first sealing strip, and a second pure water outlet flow channel is formed between the first end cover and the membrane element, and the second pure water outlet flow channel is connected to the first pure water outlet flow channel.

6. The filter element according to claim 5, characterized in that: One end of the membrane element having the fold has a wastewater outlet, and the wastewater outlet is connected to the second water inlet channel and the wastewater device.

7. The filter element according to claim 2, characterized in that: The fold is located on a first side edge in the width direction of the film bag; The sealing strip comprises: A first sealing strip, wherein the first sealing strip is located on the second side edge of the film bag in the length direction, and the first sealing strip connects the second side edges of the two film pages to seal and connect the second side edges of the two film pages together; A second sealing strip, the second sealing strip is located on the third side of the film bag in the length direction, and the second sealing strip connects the third sides of the two film pages to seal the third sides of the two film pages together; The membrane bag has a side edge of the fold connected to the outer peripheral wall of the central tube and is covered by the membrane bag; The fourth side edges of the two membrane pages in the width direction are exposed on the outer peripheral wall of the membrane element and connected to the outer peripheral wall of the membrane element.

8. The filter element according to claim 7, characterized in that: The number of the membrane bags is at least two, two adjacent membrane bags surround the second water inlet channel, and two adjacent membrane bags are disposed separately at one end having the fold.

9. The filter element according to claim 7, characterized in that: The membrane element has one end of the first sealing strip located on one side close to the water inlet of the first water inlet channel; The filter element also includes: A second end cap, wherein the second end cap is sleeved on one end of the membrane element having the first sealing strip, and a wastewater outlet flow channel is formed between the second end cap and the membrane element, and the wastewater outlet flow channel is connected to the second water inlet flow channel and the wastewater device; A third end cover, the third end cover is sleeved on one end of the membrane element having the second sealing strip; A binding element is located between the second end cover and the third end cover, and the binding element is coated on the outer peripheral wall of the membrane element.

10. A water purifier, characterized in that: A filter element comprising the filter element described in any one of claims 1 to 9.

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