Reverse osmosis filter assembly and water purification equipment

Abstract

The utility model discloses a reverse osmosis filter assembly and water purification equipment, and relates to the technical field of water purification, the reverse osmosis filter assembly comprises a shell, a central pipe and a filter element assembly, the shell is provided with a water inlet, a water outlet and a wastewater port; the central pipe is arranged in the shell and is provided with a pure water flow channel communicated with the water outlet and a waste water flow channel communicated with the waste water opening; the filter element assembly is arranged in the shell and is sleeved with the central pipe; the filter element assembly is provided with a raw water inlet side, a wastewater outlet side and a pure water outlet side, the raw water inlet side is communicated with the water inlet, the wastewater outlet side is communicated with the wastewater flow channel, and the pure water outlet side is communicated with the pure water flow channel. According to the reverse osmosis filter assembly disclosed by the utility model, on the basis of water inlet and water outlet on the same side, an internal flow channel of the reverse osmosis filter element can be simplified, and cross contamination of purified water and wastewater is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, and particularly relates to a reverse osmosis filtration component and a water purification device. Background Art

[0002] In the related art, for an insertable reverse osmosis filtration component, its water inlet, pure water outlet and waste water outlet are all arranged on the same side. Therefore, the raw water inlet side, pure water outlet side and waste water outlet side of the reverse osmosis filter element are all located on the same end face of the filter element. However, for such a reverse osmosis filter element, a more complex flow channel design is required inside the filter element to ensure that the raw water can be evenly distributed on the surface of the filter element and effectively separate the waste water and pure water. Moreover, if the filter element cannot effectively separate the pure water and waste water, there may also be a risk of cross-contamination. Summary of the Utility Model

[0003] The main object of the utility model is to provide a reverse osmosis filtration component and a water purification device, aiming to simplify the internal flow channel of the reverse osmosis filter element and avoid cross-contamination between pure water and waste water.

[0004] To achieve the above object, the reverse osmosis filtration component provided by the utility model includes a housing, a central tube and a filter element assembly. The housing is provided with a water inlet, a water outlet and a waste water outlet; the central tube is arranged inside the housing and has a pure water flow channel communicated with the water outlet and a waste water flow channel communicated with the waste water outlet. The central tube is provided with a connecting tube, and both ends of the connecting tube are communicated with the pure water flow channel; the filter element assembly is arranged inside the housing and sleeved on the central tube; the filter element assembly has a raw water inlet side, a waste water outlet side and a pure water outlet side. The raw water inlet side is communicated with the water inlet, the waste water outlet side is communicated with the waste water flow channel, and the pure water outlet side is communicated with the pure water flow channel through both ends of the connecting tube.

[0005] In one embodiment, the central tube includes an inner tube body and an outer tube body. The inner tube body is located inside the outer tube body. The inner tube body forms the pure water flow channel, and the waste water flow channel is formed between the inner tube body and the outer tube body.

[0006] In one embodiment, the inner tube body and the outer tube body are coaxially arranged.

[0007] In one embodiment, the outer wall surface of the end of the inner tube body close to the water outlet is connected with the inner wall surface of the outer tube body through an annular plug. A pure water buffer cavity is formed between the annular plug and the end face of the outer tube body. The pure water buffer cavity is communicated with the pure water flow channel, and the diameter of the pure water buffer cavity is larger than that of the pure water flow channel.

[0008] In one embodiment, a pure water inlet, a first wastewater inlet, and a second wastewater inlet are formed in the outer pipe body. The pure water outlet side and the pure water flow channel are communicated through the pure water inlet. The first wastewater inlet communicates the wastewater outlet side and the wastewater flow channel. The second wastewater inlet communicates the wastewater outlet and the wastewater flow channel.

[0009] In one embodiment, the connecting pipe penetrates through the side wall of the outer pipe body and is communicated with the pure water flow channel formed in the inner pipe body. Both ends of the connecting pipe form the pure water inlet.

[0010] In one embodiment, there are multiple connecting pipes, and the multiple connecting pipes are arranged at intervals along the axial direction of the central pipe.

[0011] In one embodiment, the length of the central pipe is set as L1, and the distance between the pure water inlet close to the first wastewater inlet and the first wastewater inlet is set as L2, satisfying 0.25 ≤ L2 / L1 ≤ 0.4.

[0012] In one embodiment, the first wastewater inlet is a water passing notch formed at one end of the outer pipe body; the second wastewater inlet is formed at the other end of the outer pipe body and is close to the wastewater outlet.

[0013] In one embodiment, the filter element assembly includes a reverse osmosis filter element, and a first end cap and a second end cap respectively arranged at both ends of the reverse osmosis filter element. The second end cap is located on the side of the reverse osmosis filter element close to the water inlet; both the first end cap and the second end cap are adhesively connected to the reverse osmosis filter element.

[0014] In one embodiment, the central pipe penetrates through the second end cap and is hermetically connected to the second end cap and the housing; the second end cap is hermetically connected to the housing and forms a separated first chamber and second chamber. The first chamber communicates the raw water inlet side and the water inlet, and the second chamber communicates the wastewater flow channel and the wastewater outlet.

[0015] In one embodiment, the second chamber is located inside the first chamber.

[0016] In one embodiment, the central pipe and the filter element assembly are coaxially arranged.

[0017] The present utility model also provides a water purification device, which includes the reverse osmosis filtration assembly. The reverse osmosis filtration assembly includes a housing, a central tube, and a filter element assembly. The housing is provided with a water inlet, a water outlet, and a wastewater outlet; the central tube is disposed inside the housing and has a pure water flow channel communicating with the water outlet and a wastewater flow channel communicating with the wastewater outlet; the filter element assembly is disposed inside the housing and sleeved on the central tube; the filter element assembly has a raw water inlet side, a wastewater outlet side, and a pure water outlet side. The raw water inlet side communicates with the water inlet, the wastewater outlet side communicates with the wastewater flow channel, and the pure water outlet side communicates with the pure water flow channel.

[0018] The technical solution of the present utility model adopts a central tube with an inner and outer double-layer sleeve structure, which respectively forms two independent pure water flow channels and wastewater flow channels. Since the water inlet, the water outlet, and the wastewater outlet are all arranged on the same side of the housing, and the pure water flow channel and the wastewater flow channel are both formed in the central tube, the wastewater and pure water generated after passing through the filter element assembly respectively flow out directly through the wastewater flow channel and the pure water flow channel in the central tube, without the need for the filter element assembly itself to effectively separate the pure water and the wastewater, thus simplifying the internal flow channel structure of the filter element assembly. At the same time, the wastewater flow channel and the pure water flow channel do not interfere with each other, avoiding the cross-contamination of wastewater and pure water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a three-dimensional structure schematic diagram of an embodiment of the reverse osmosis filtration assembly provided by the present utility model;

[0021] Figure 2 For Figure 1 it is a three-dimensional structure schematic diagram of another perspective of the reverse osmosis filtration assembly in

[0022] Figure 3 For Figure 1 it is an exploded view of the reverse osmosis filtration assembly in

[0023] Figure 4 For Figure 1 it is a structure schematic diagram of another perspective of the reverse osmosis filtration assembly in

[0024] Figure 5 For Figure 4 it is a cross-sectional view along the K-K line in

[0025] Figure 6 is Figure 5 a partial enlarged view of part A in

[0026] Figure 7 is Figure 4 a sectional view taken along line M-M in

[0027] Figure 8 is Figure 4 a sectional view of the reverse osmosis filtration module in this perspective in

[0028] Figure 9 is Figure 1 a three-dimensional structural schematic diagram of the central pipe in

[0029] Figure 10 is Figure 9 a sectional view of the central pipe in

[0030] Figure 11 is a schematic diagram of the raw water-pure water water flow direction of the reverse osmosis filtration module provided by the present utility model;

[0031] Figure 12 is a schematic diagram of the raw water-waste water water flow direction of the reverse osmosis filtration module provided by the present utility model.

[0032] Explanation of the reference numerals in the drawings:

[0033] 10. Reverse osmosis filtration module;

[0034] 100. Housing; 110. Water inlet; 120. Water outlet; 130. Waste water outlet; 140. Filter bottle; 141. Bottle body; 141a. Accommodation cavity; 142. Adapter plate; 150. Installation cover;

[0035] 200. Central pipe; 200a. Pure water flow channel; 200b. Waste water flow channel; 200c. Pure water buffer cavity; 210. Inner pipe body; 220. Outer pipe body; 221. First waste water through hole; 222. Second waste water through hole; 230. Annular plug; 240. Connecting pipe; 241. Pure water through hole;

[0036] 300. Filter element assembly; 300a. Raw water inlet side; 300b. Waste water outlet side; 300c. Pure water outlet side; 310. Reverse osmosis filter element; 320. First end cap; 330. Second end cap; 331. First chamber; 332. Second chamber.

[0037] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0039] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, 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 quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B 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 those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0041] With the public's pursuit of the quality of life, the quality of water has begun to attract much attention. Water purification equipment with reverse osmosis function is becoming more and more popular among the public because the purified water produced is fresher, more hygienic, and safer. In the related art, for an insertable reverse osmosis filtration component, its water inlet, pure water outlet, and waste water outlet are all arranged on the same side. Therefore, the raw water inlet side, pure water outlet side, and waste water outlet side of the reverse osmosis filter element are all located on the same end face of the filter element. However, for such a reverse osmosis filter element, a more complex flow channel design is required inside the filter element to ensure that the raw water can be evenly distributed on the surface of the filter element and effectively separate the waste water and pure water. Moreover, if the filter element cannot effectively separate the purified water and the waste water, there may also be a risk of cross-contamination.

[0042] The present utility model provides a reverse osmosis filtration component, which can simplify the internal flow channel of the reverse osmosis filter element with the same-side inlet and outlet, and avoid cross-contamination between purified water and waste water. The reverse osmosis filtration component of the present utility model is applied to water purification equipment, and the water purification equipment is a water dispenser, a drinking fountain, or a pure water machine.

[0043] Please refer to Figures 1 to 5 In an embodiment of the present utility model, the reverse osmosis filtration assembly 10 includes a housing 100, a central tube 200, and a filter element assembly 300. The housing 100 is provided with a water inlet 110, a water outlet 120, and a wastewater outlet 130. The central tube 200 is disposed within the housing 100 and has a pure water flow channel 200a communicating with the water outlet 120 and a wastewater flow channel 200b communicating with the wastewater outlet 130. The central tube 200 is provided with a connecting tube 240, and both ends of the connecting tube 240 communicate with the pure water flow channel 200a. The filter element assembly 300 is disposed within the housing 100 and sleeved on the central tube 200. The filter element assembly 300 has a raw water inlet side 300a, a wastewater outlet side 300b, and a pure water outlet side 300c. The raw water inlet side 300a communicates with the water inlet 110, the wastewater outlet side 300b communicates with the wastewater flow channel 200b, and the pure water outlet side 300c communicates with the pure water flow channel 200a through both ends of the connecting tube 240.

[0044] Specifically, please refer to Figure 3 and Figure 5 The housing 100 includes a filter bottle 140 and a mounting cover 150. An accommodation cavity 141a for mounting the central tube 200 and the filter element assembly 300 is formed within the filter bottle 140. The filter bottle 140 is generally cylindrical in shape, with one end open for installing structures such as the filter element assembly 300 and the central tube 200 into the accommodation cavity 141a through this open end. The mounting cover 150 covers the open end of the filter bottle 140, and the two can be connected by rotational welding technology, that is, by friction welding of plastic workpieces to generate heat, melting the contact surface, and relying on external pressure and drive to rotate and solidify the workpieces into one body to ensure the sealing of the reverse osmosis filtration assembly 10 and prevent water leakage.

[0045] Please refer to Figure 3, Further, the filter bottle 140 includes a bottle body 141 and an adapter plate 142. A receiving cavity 141a is formed in the bottle body 141. The adapter plate 142 is installed at one end of the bottle body 141 away from the mounting cover 150. An inlet 110, an outlet 120, and a wastewater outlet 130 that communicate with the receiving cavity 141a are provided on the adapter plate 142. The setting of the adapter plate 142 can integrate the inlet 110, the outlet 120, and the wastewater outlet 130 that are respectively connected to the raw water inlet side 300a, the wastewater outlet side 300b, and the pure water outlet side 300c of the filter element assembly 300, facilitating connection with other pipelines or water circuit boards. Among them, the inlet 110 is used for the water to be filtered to flow into the housing 100, the outlet 120 is used for the pure water filtered by the filter element assembly 300 to flow out, and the wastewater outlet 130 is used for the wastewater filtered by the filter element assembly 300 to flow out. It should be noted here that the pure water mentioned above and hereinafter refers to purified water with a low TDS; the wastewater refers to concentrated water with a high TDS. The central tube 200 is arranged inside the filter bottle 140 and has a pure water flow channel 200a communicating with the outlet 120 and a wastewater flow channel 200b communicating with the wastewater outlet 130.

[0046] Please refer to Figures 3 to 5 , The filter element assembly 300 is arranged in the receiving cavity 141a and is sleeved on the central tube 200. Moreover, the filter element assembly 300 has a raw water inlet side 300a, a wastewater outlet side 300b, and a pure water outlet side 300c. The raw water inlet side 300a communicates with the inlet 110, the wastewater outlet side 300b communicates with the wastewater flow channel 200b, and the pure water outlet side 300c communicates with the pure water flow channel 200a; that is to say, the water flowing into the receiving cavity 141a from the inlet 110 first flows through the raw water inlet side 300a of the filter element assembly 300 for filtration. After filtration, the water is divided into two paths (Please refer to Figure 11 and Figure 12 ). One path is wastewater and the other is pure water. The wastewater flows through the wastewater flow channel 200b and is discharged from the wastewater outlet 130, and the pure water flows through the pure water flow channel 200a and is discharged from the outlet 120 for direct drinking by users or flows into the next filtration module for re-filtration.

[0047] Please refer to Figures 8 to 10 , The central tube 200 is further provided with a connecting tube 240. A flow channel is formed inside the connecting tube 240, and both ends of the connecting tube 240 communicate with the pure water flow channel 200a. Its two end ports can be pure water through ports 241 that communicate the pure water flow channel 200a and the pure water outlet side 300c of the filter element assembly 300.

[0048] Since the water inlet 110, the water outlet 120, and the wastewater outlet 130 are all provided on the same side of the housing 100, and the pure water flow channel 200a and the wastewater flow channel 200b are both formed in the central tube 200, therefore, the wastewater and the pure water generated after being filtered by the filter element assembly 300 flow out directly through the wastewater flow channel 200b and the pure water flow channel 200a in the central tube 200 respectively, without the need for the filter element assembly 300 itself to effectively separate the pure water and the wastewater, which simplifies the internal flow channel structure of the filter element assembly 300. At the same time, the wastewater flow channel 200b and the pure water flow channel 200a do not interfere with each other, avoiding the occurrence of cross-contamination between the wastewater and the pure water.

[0049] Please continue to refer to Figures 8 to 10 In an embodiment, the central tube 200 includes an inner tube body 210 and an outer tube body 220. The inner tube body 210 is located inside the outer tube body 220. The inner tube body 210 forms the pure water flow channel 200a, and the wastewater flow channel 200b is formed between the inner tube body 210 and the outer tube body 220. Specifically, the central tube 200 includes an inner tube body 210 and an outer tube body 220 that are sleeved inside and outside. The outer tube body 220 is located outside the inner tube body 210, and there is a gap between the two. The pure water flow channel 200a is formed in the inner tube body 210, and the gap between the inner tube body 210 and the outer tube body 220 forms the wastewater flow channel 200b. Setting the central tube 200 in the form of an inner and outer tube body 220 is convenient for directly connecting the inner tube body 210 to the water outlet 120 on the one hand, and has a good isolation effect on the two flow channels on the other hand, ensuring that there is no cross-flow between the two.

[0050] Furthermore, the inner tube body 210 and the outer tube body 220 are coaxially arranged. With this arrangement, the structure of the central tube 200 is symmetrical, which is convenient for the production and manufacturing of the central tube 200, and is also convenient for the cooperation between the central tube 200 and the filter element assembly 300.

[0051] Please refer to Figure 6 and Figure 10 In an embodiment, the outer wall surface of the end of the inner tube body 210 close to the water outlet 120 is connected to the inner wall surface of the outer tube body 220 through an annular plug 230. A pure water buffer cavity 200c is formed between the annular plug 230 and the end face of the outer tube body 220. The pure water buffer cavity 200c is communicated with the pure water flow channel 200a, and the diameter of the pure water buffer cavity 200c is larger than the diameter of the pure water flow channel 200a.

[0052] Specifically, at the end of the central tube 200 near the water outlet 120, the length of the outer tube body 220 is greater than that of the inner tube body 210. The outer wall surface of the inner tube body 210 and the inner wall surface of the outer tube body 220 are connected by an annular plug 230 to isolate the pure water flow channel 200a and the wastewater flow channel 200b, ensuring that the water in the two flow channels does not flow into each other and avoiding cross - contamination. Among them, the annular plug 230 is integrally formed with the inner tube body 210 and the outer tube body 220, which is convenient for manufacturing, saves the trouble of assembling the three, and improves efficiency. A pure water buffer cavity 200c is formed between the end face of the annular plug 230 and the end face of the outer tube body 220. It can also be understood that a pure water buffer cavity 200c is formed between the end face of the inner tube body 210 and the end face of the outer tube body 220. The diameter of the pure water buffer cavity 200c is larger than that of the pure water flow channel 200a. At the same flow rate, the water flow velocity in the slender pure water flow channel 200a is relatively fast, and the pure water buffer cavity 200c is located between the water outlet end of the pure water flow channel 200a and the water outlet 120, which can buffer the water flowing out of the pure water flow channel 200a.

[0053] Please refer to Figures 8 to 12 , in an embodiment, the outer tube body 220 is provided with a pure water water inlet 241, a first wastewater water inlet 221 and a second wastewater water inlet 222. The pure water outlet side 300c and the pure water flow channel 200a are connected through the pure water water inlet 241. The first wastewater water inlet 221 connects the wastewater outlet side 300b and the wastewater flow channel 200b, and the second wastewater water inlet 222 connects the wastewater outlet 120 and the wastewater flow channel 200b.

[0054] Specifically, the pure water filtered by the filter element assembly 300 flows into the pure water flow channel 200a through the pure water water inlet 241 and is discharged from the water outlet 120. The wastewater filtered by the filter element assembly 300 first flows into the wastewater flow channel 200b through the first wastewater water inlet 221, and then flows out of the wastewater flow channel 200b from the second wastewater outlet 130 and flows to the wastewater outlet 130 for discharge.

[0055] Please refer to Figures 8 to 10, it is worth mentioning that the central pipe 200 is further provided with a connecting pipe 240. The connecting pipe 240 penetrates through the side wall of the outer pipe body 220 and is communicated with the pure water flow channel 200a formed in the inner pipe body 210. The two end ports of the connecting pipe 240 form pure water inlets 241. That is to say, the central pipe 200 is provided with a connecting pipe 240 that penetrates through the side wall of the outer pipe body 220. Since the pure water flow channel 200a is formed in the inner pipe body 210 and the inner pipe body 210 is located inside the outer pipe body 220, the connecting pipe 240 penetrates through the opposite side walls of the outer pipe body 220 and passes through the inner pipe body 210. The inside of the connecting pipe 240 is communicated with the pure water flow channel 200a and is isolated from the waste water flow channel 200b. The opposite ends of the connecting pipe 240, that is, the two openings formed by penetrating through the side wall of the outer pipe body 220, are the pure water inlets 241 that communicate the pure water flow channel 200a and the pure water outlet side 300c of the filter element assembly 300, and the pure water inlets 241 are symmetrically arranged on the opposite sides of the outer pipe body 220.

[0056] Please refer to Figures 7 to 10 , further, there are multiple connecting pipes 240, and the multiple connecting pipes 240 are arranged at intervals along the axial direction of the central pipe 200. That is, the number of pure water inlets 241 is multiple, and the multiple pure water inlets 241 are arranged at intervals along the axial direction of the central pipe 200. The pure water outlet side 300c of the filter element assembly 300 and the pure water flow channel 200a are communicated through the multiple pure water inlets 241, further ensuring the flow rate of pure water and realizing large flux. The number of the connecting pipes 240 is exemplarily 5, 6, 7, 8, 9 or 10, and correspondingly, the number of the pure water inlets 241 is twice the number of the connecting pipes 240. It should be noted that the central pipe 200 is arranged inside the filter element assembly 300 and has the function of supporting the inside of the filter element assembly 300, preventing the filter element assembly 300 from being deformed by a large water pressure structure, and further ensuring the smooth water outlet water path of the filter element assembly 300.

[0057] Please refer to Figure 10, in an embodiment, the length of the central tube 200 is set as L1, and the distance between the pure water water inlet 241 close to the first waste water water inlet 221 and the first waste water water inlet 221 is set as L2, satisfying 0.25 ≤ L2 / L1 ≤ 0.4. Specifically, the central tube 200 is a long tube with a certain length. Since the first waste water water inlet 221 is used for the waste water generated after passing through the filter element assembly 300 to flow in and flow into the waste water flow channel 200b, and according to the filtering principle of the filtering assembly, inside the filtering assembly, as the water flow direction, pure water will sequentially pass through the pure water water inlet 241 and flow into the pure water flow channel 200a, while the concentration of the waste water will become higher and higher (i.e., the TDS value becomes higher and higher). Therefore, the water flow concentration of the first waste water water inlet 221 closer to the waste water outlet side 300b of the filter element assembly 300 is higher. Therefore, the distance between the pure water water inlet 241 close to the first waste water water inlet 221 and the first waste water water inlet 221 is set as L2, the overall length of the central tube 200 is set as L1, and the ratio of L2 to L1 is limited between 0.25 and 0.4 to ensure that the waste water close to the first waste water water inlet 221 will not flow into the pure water flow channel 200a through the pure water water inlet 241 and pollute the pure water.

[0058] Please refer to Figure 9 and Figure 12 , in an embodiment, the first waste water water inlet 221 is a water passing notch opened at one end of the outer tube body 220; the second waste water water inlet 222 is opened at the other end of the outer tube body 220 and is close to the waste water port 130. Specifically, the first waste water water inlet 221 is a water passing notch opened at the end of the outer tube body 220, and the water passing notch can be set as an arc-shaped notch. The second waste water port 130 is opened at the other end of the outer tube body 220 opposite to the first waste water port 130, that is, the end close to the waste water port 130. Setting the first waste water water inlet 221 as a water passing notch is convenient for collecting waste water and flowing it through the waste water flow channel 200b to flow out from the second waste water water inlet 222.

[0059] Please refer to Figure 5 , Figure 11 and Figure 12 , it is worth mentioning that the raw water inlet side 300a and the waste water outlet side 300b of the filter element assembly 300 can be set as two opposite end faces of the filter element assembly 300 along its length direction. The water passing notch is directly communicated with the waste water outlet side 300b, and the opening of the water passing notch abuts against the housing 100 or other structures to facilitate the collection of waste water.

[0060] Please refer to Figure 7, in one embodiment, the filter element assembly 300 includes a reverse osmosis filter element 310, and a first end cap 320 and a second end cap 330 respectively disposed at both ends of the reverse osmosis filter element 310. The second end cap 330 is located on the side of the reverse osmosis filter element 310 close to the water inlet 110; both the first end cap 320 and the second end cap 330 are adhesively bonded to the reverse osmosis filter element 310. Specifically, the first filter element and the second filter element are used to fix the reverse osmosis filter element 310, and both the first end cap 320 and the second end cap 330 are adhesively bonded to the reverse osmosis filter element 310, preventing the reverse osmosis filter element 310 from being impacted by water pressure and thus deformed and misaligned, further extending the service life of the reverse osmosis filter element 310. The reverse osmosis filter element 310 is used to filter the raw water flowing into the housing 100.

[0061] Please refer to Figure 5 , Figure 7 and Figure 8 , the reverse osmosis filter element 310 is arranged in an annular column shape, and its inner wall surface is sleeved on the outer wall surface of the central tube 200. The reverse osmosis filter element 310 has a raw water inlet side 300a, a waste water outlet side 300b, and a pure water outlet side 300c. Among them, the raw water inlet side 300a is used for the external water flow to flow into the reverse osmosis filter element 310 for filtration. When the water flow flowing into the reverse osmosis filter element 310 is filtered, two paths of water are generated, one path of waste water and one path of pure water (i.e., the filtered water filtered by the reverse osmosis filter element 310). The waste water flows out from the waste water outlet side 300b and flows through the waste water channel 200b to the waste water port 130, and the pure water flows from the pure water outlet side 300c to the pure water channel 200a and then undergoes a post-filtration process or is directly supplied to users after flowing out. In this embodiment, the pure water outlet side 300c of the reverse osmosis filter element 310 is the inner wall surface of the annular column-shaped reverse osmosis filter element 310, so that the pure water flowing out from the pure water outlet side 300c directly flows into the pure water channel 200a through the pure water water inlet 241; the raw water inlet side 300a of the reverse osmosis filter element 310 is the end face of the reverse osmosis filter element 310 close to the water inlet 110, and the waste water outlet side 300b is the end face of the other end of the reverse osmosis filter element 310 opposite to the raw water inlet side 300a.

[0062] Please refer to Figure 6 , further, the central tube 200 penetrates through the second end cap 330 and is hermetically connected to the second end cap 330 and the housing 100; the second end cap 330 is hermetically connected to the housing 100 and forms a separated first chamber 331 and second chamber 332. The first chamber 331 communicates with the raw water inlet side 300a and the water inlet 110, and the second chamber 332 communicates with the waste water channel 200b and the waste water port 130.

[0063] Specifically, the central tube 200 and the second end cap 330 are hermetically connected through a sealing ring to ensure the stability of the connection of the central tube 200 and prevent the cross-flow of pure water and wastewater. At the same time, the mutually isolated first chamber 331 and second chamber 332, where the first chamber 331 is used for raw water inlet, and the second chamber 332 is used for wastewater outflow, realizing the mutual isolation of the raw water water path and the wastewater water path. Furthermore, after the central tube 200 passes through the second end cap 330, it is hermetically connected to the housing 100, that is, the pure water flow channel 200a formed inside the central tube 200 is directly communicated with the water outlet 120 on the housing 100, realizing the isolation of the raw water water path, the wastewater water path and the pure water water path inside the housing 100, and the three water paths do not affect or interfere with each other.

[0064] Regarding the positions of the first chamber 331 and the second chamber 332, the second chamber 332 is located inside the first chamber 331. The first chamber 331 and the second chamber 332 respectively correspond to the raw water inlet side 300a of the filter element assembly 300 and the water outlet end of the wastewater flow channel 200b, so the second chamber 332 is arranged inside the first chamber 331.

[0065] In an embodiment, the central tube 200 and the filter element assembly 300 are coaxially arranged. The coaxiality of the central tube 200 and the filter element assembly 300 is ensured, thereby improving the stability of the internal water path system of the filter element, enhancing the water flow efficiency, and facilitating production and manufacturing.

[0066] The water inlet 110, the water outlet 120 and the wastewater outlet 130 of the reverse osmosis filtration assembly 10 of the present application are all arranged on the same side of the housing 100. The reverse osmosis filter element 310 of the filter element assembly 300 is arranged in an annular column shape. Its raw water inlet side 300a is the end face of the reverse osmosis filter element 310 close to the water inlet 110, the wastewater outlet side 300b is the end face of the other end of the reverse osmosis filter element 310 opposite to the raw water inlet side 300a, and the pure water outlet side 300c is the inner ring wall surface of the annular column-shaped reverse osmosis filter element 310. The specific flow path of the entire reverse osmosis filtration assembly 10 is as follows:

[0067] Please refer to Figure 11 and Figure 12, water flows into the housing 100 from the water inlet 110 under the pressure boosting effect of the booster pump, and flows through the raw water inlet side 300a for filtration. After being filtered by the reverse osmosis filter element 310, two paths of water are generated, one path of wastewater and one path of pure water (i.e., the purified water after being filtered by the reverse osmosis filter element 310). Among them, the wastewater first flows out through the wastewater outlet side 300b, then flows into the wastewater flow channel 200b through the first wastewater through hole 221, and then flows out of the wastewater flow channel 200b through the second wastewater through hole 222, and finally is discharged from the wastewater outlet 130; the pure water first flows out through the pure water outlet side 300c, and flows into the pure water flow channel 200a through the pure water through hole 241, and then directly flows out of the pure water flow channel 200a from the water outlet 120 for direct drinking by users or flows into the next filtration module for re - filtration.

[0068] The present utility model also proposes a water purification device, which includes the aforementioned reverse osmosis filtration assembly 10. The specific structure of the reverse osmosis filtration assembly 10 refers to the above - mentioned embodiments. Since this water purification device adopts all the technical solutions of the above - mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above - mentioned embodiments, which will not be elaborated one by one here. Among them, the reverse osmosis filtration assembly 10 includes a housing 100, a central tube 200, and a filter element assembly 300. The housing 100 is provided with a water inlet 110, a water outlet 120, and a wastewater outlet 130; the central tube 200 is arranged inside the housing 100, and has a pure water flow channel 200a communicated with the water outlet 120, and a wastewater flow channel 200b communicated with the wastewater outlet 130; the filter element assembly 300 is arranged inside the housing 100 and sleeved on the central tube 200; the filter element assembly 300 has a raw water inlet side 300a, a wastewater outlet side 300b, and a pure water outlet side 300c. The raw water inlet side 300a is communicated with the water inlet 110, the wastewater outlet side 300b is communicated with the wastewater flow channel 200b, and the pure water outlet side 300c is communicated with the pure water flow channel 200a. The water purification device is any one of a water dispenser, a drinking fountain, or a pure water machine.

[0069] The reverse osmosis filtration assembly 10 of the present application is used for a water purification device. In addition to the reverse osmosis filtration assembly 10, a pre - filter element assembly 300 can also be arranged upstream of the water inlet 110, that is, the water entering the water inlet 110 is filtered by the pre - filter element. When the pre - filter element filters, the pre - filter element will adsorb larger - particle impurities in the water and preliminarily filter the raw water, and then filter out most of the salt ions in the water through the filter membrane of the reverse osmosis filter element 310. In addition, a post - filter element assembly 300 can also be arranged at the rear end of the reverse osmosis filtration assembly 10, that is, the filtered water after being filtered by the reverse osmosis filtration assembly 10 is filtered by the post - filter element to remove color and adjust the taste, and then flows into the user end from the faucet.

[0070] In this embodiment, the reverse osmosis filter element 310 is integrally arranged in the housing 100. Of course, in other embodiments, the pre-filter element assembly 300, the post-filter element assembly 300, and the reverse osmosis filtration assembly 10 can also be integrally integrated in the same housing 100, or the pre-filter element assembly 300 and the post-filter element assembly 300 can be integrated in the same housing 100. There is no specific limitation on this.

[0071] The technical solution of the present utility model adopts a central tube 200 provided with an inner and outer double-layer sleeve, which respectively form two independent pure water channels 200a and waste water channels 200b. Since the water inlet 110, the water outlet 120, and the waste water outlet 130 are all arranged on the same side of the housing 100, and both the pure water channel 200a and the waste water channel 200b are formed in the central tube 200, therefore, the waste water and pure water generated after passing through the filter element assembly 300 respectively flow out directly through the waste water channel 200b and the pure water channel 200a in the central tube 200, without the need for the filter element assembly 300 itself to effectively separate the pure water and the waste water, which simplifies the internal flow channel structure of the filter element assembly 300. At the same time, the waste water channel 200b and the pure water channel 200a do not interfere with each other, avoiding the occurrence of cross-contamination between the waste water and the pure water.

[0072] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A reverse osmosis filtration component, characterized in that: include: The shell is provided with a water inlet, a water outlet and a wastewater outlet; A central tube is disposed in the shell and has a pure water flow channel connected to the water outlet and a waste water flow channel connected to the waste water outlet. The central tube is provided with a connecting pipe, and both end ports of the connecting pipe are connected to the pure water flow channel; as well as A filter element assembly is arranged in the shell and is sleeved with the central tube; the filter element assembly has a raw water inlet side, a wastewater outlet side and a pure water outlet side, the raw water inlet side is connected to the water inlet, the wastewater outlet side is connected to the wastewater flow channel, and the pure water outlet side is connected to the pure water flow channel through the two end ports of the connecting pipe.

2. The reverse osmosis filtration assembly according to claim 1, characterized in that The central tube comprises an inner tube body and an outer tube body, wherein the inner tube body is located inside the outer tube body, the inner tube body forms the pure water flow channel, and the waste water flow channel is formed between the inner tube body and the outer tube body.

3. The reverse osmosis filtration assembly according to claim 2, characterized in that: The inner tube body and the outer tube body are coaxially arranged.

4. The reverse osmosis filtration assembly according to claim 2, characterized in that: The outer wall surface of the end of the inner tube body close to the water outlet is connected to the inner wall surface of the outer tube body through an annular plug, and a pure water buffer chamber is formed between the annular plug and the end surface of the end of the outer tube body. The pure water buffer chamber is connected to the pure water flow channel, and the diameter of the pure water buffer chamber is larger than the diameter of the pure water flow channel.

5. The reverse osmosis filtration assembly according to claim 2, characterized in that: The outer tube body is provided with a pure water inlet, a first waste water inlet and a second waste water inlet. The pure water outlet side and the pure water flow channel are connected through the pure water inlet, the first waste water inlet connects the waste water outlet side and the waste water flow channel, and the second waste water inlet connects the waste water outlet side and the waste water flow channel.

6. The reverse osmosis filtration assembly according to claim 5, characterized in that: The connecting pipe passes through the side wall of the outer tube body and is communicated with the pure water flow channel formed in the inner tube body, and the two end ports of the connecting pipe form the pure water outlets.

7. The reverse osmosis filtration assembly according to claim 6, characterized in that: There are a plurality of connecting pipes, and the connecting pipes are arranged at intervals along the axial direction of the central pipe.

8. The reverse osmosis filtration assembly according to claim 7, characterized in that: The length of the central tube is set to L1, and the distance between the pure water outlet close to the first wastewater outlet and the first wastewater outlet is set to L2, satisfying 0.25≤L2 / L1≤0.

4.

9. The reverse osmosis filtration assembly according to claim 5, characterized in that: The first wastewater outlet is a water-passing notch opened at one end of the outer tube body; the second wastewater outlet is opened at the other end of the outer tube body and is arranged close to the wastewater outlet.

10. The reverse osmosis filtration assembly according to any one of claims 1 to 9, characterized in that: The filter element assembly includes a reverse osmosis filter element, and a first end cap and a second end cap respectively arranged at both ends of the reverse osmosis filter element, the second end cap is located on a side of the reverse osmosis filter element close to the water inlet; the first end cap and the second end cap are both glued to the reverse osmosis filter element.

11. The reverse osmosis filtration assembly according to claim 10, characterized in that: The central tube passes through the second end cover and is sealed with the second end cover and the shell; the second end cover is sealed with the shell to form a first chamber and a second chamber that are isolated from each other, the first chamber is connected to the raw water inlet side and the water inlet, and the second chamber is connected to the wastewater flow channel and the wastewater outlet.

12. The reverse osmosis filtration assembly according to claim 11, characterized in that The second chamber is located inside the first chamber.

13. The reverse osmosis filtration assembly according to any one of claims 1 to 9, characterized in that: The central tube and the filter element assembly are coaxially arranged.

14. A water purification device, characterized in that: Comprising the reverse osmosis filtration component according to any one of claims 1 to 13.

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