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 equipment, the reverse osmosis filter assembly comprises a filter bottle, a reverse osmosis filter element and a central pipe, the filter bottle is provided with an upper end and a lower end, and the upper end of the filter bottle is provided with a water inlet, a water outlet and a wastewater port; the reverse osmosis filter element is arranged in the filter bottle; the reverse osmosis filter element is sleeved on the central pipe, and a central flow channel and an interlayer flow channel which are separated from each other are formed in the central pipe. According to the technical scheme, the central pipe is provided with the central flow channel and the interlayer flow channel which are separated from each other, and the interlayer flow channel and the central flow channel are respectively used for discharging pure water and waste water filtered by the reverse osmosis filter element, so that a waste water flow path which is originally positioned on the inner side of the reverse osmosis filter element can be moved to the central pipe; therefore, mutual interference between a wastewater flow path and a raw water path of the reverse osmosis filter element is avoided, and the pure water outlet efficiency of the reverse osmosis filter element is improved.

Description

Technical Field

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

[0002] With the pursuit of the public for the quality of life, the quality of water has begun to attract much attention. The water purification equipment with reverse osmosis function is more and more popular among the public because the purified water produced by it is fresher, more hygienic and safer. The raw water usually has a high TDS. Under the action of a booster pump, the reverse osmosis filter element can block a large number of ions in the raw water in front of the osmosis membrane, and then discharge a large number of ions through the waste water from the osmosis membrane, so that the TDS of the water passing through the osmosis membrane meets the standard of direct drinking water. At present, the pure water waterway and the waste water waterway of the existing reverse osmosis filter element are both concentrated at a position close to the inner side of the reverse osmosis filter element, which will cause cross-contamination between the waste water and the raw water. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose a reverse osmosis filtration component and a water purification equipment, aiming to improve the waste water flow path of the reverse osmosis filter element.

[0004] To achieve the above object, the reverse osmosis filtration component proposed by the utility model includes:

[0005] A filter bottle having an upper end and a lower end, wherein an inlet, an outlet and a waste water outlet are opened at the upper end of the filter bottle;

[0006] A reverse osmosis filter element disposed in the filter bottle;

[0007] A central tube, the reverse osmosis filter element is sleeved on the central tube, a central flow channel and a sandwich flow channel which are separated from each other are formed in the central tube, the sandwich flow channel is located outside the central flow channel, the central tube is provided with a plurality of first flow-through channels, the pure water side of the reverse osmosis filter element is communicated with the central flow channel through the first flow-through channels, and the first flow-through channels are separated from the sandwich flow channel;

[0008] Wherein, the plurality of first flow-through channels are communicated with the outlet through the central flow channel, and the waste water side of the reverse osmosis filter element is communicated with the waste water outlet through the sandwich flow channel.

[0009] In one embodiment, the central tube includes an outer tube, an inner tube and a connecting section, the outer tube and the inner tube are connected by the connecting section, the central flow channel is formed inside the inner tube, the sandwich flow channel is formed between the inner tube and the outer tube, the first flow-through channels are formed in the connecting section, and the outer tube is provided with a through-flow port.

[0010] In one embodiment, the reverse osmosis filtration assembly further includes a first filter element cover connected to the lower end of the reverse osmosis filter element. The inner tube extends out of the lower end of the outer tube. The first filter element cover is provided with a sunk groove corresponding to the inner tube, and at least a part of the inner tube extends into the sunk groove. A first sealing ring is arranged between the groove wall of the sunk groove and the outer wall of the inner tube.

[0011] In one embodiment, the first filter element cover has a surface facing the side of the reverse osmosis filter element, and an annular rib is protruding from the surface, so that the reverse osmosis filter element and the first filter element cover enclose a second flow-through channel, and the second flow-through channel is communicated with the through-flow port.

[0012] In one embodiment, the reverse osmosis filtration assembly further includes a second filter element cover connected to the upper end of the reverse osmosis filter element. The second filter element cover is provided with a first partition portion and a second partition portion protruding therefrom. The second partition portion is located outside the first partition portion. The first partition portion and the second partition portion sequentially separate an inlet water chamber and a waste water chamber from outside to inside. The inlet water chamber is communicated with the water inlet side of the reverse osmosis filter element, and the waste water port is communicated with the interlayer flow channel through the waste water chamber.

[0013] In one embodiment, the central tube further includes a cut-off plate respectively connected to the inner tube and the outer tube to block the upper end of the interlayer flow channel. The outer tube is provided with a water passing hole communicated with the waste water chamber.

[0014] In one embodiment, the outer tube extends upward from the cut-off plate to form an extension section. The extension section, the cut-off plate and the second filter element cover enclose a flow expansion chamber, and the flow expansion chamber is communicated with the central flow channel.

[0015] In one embodiment, the filter bottle is provided with an annular protruding portion facing downward, the extension section is inserted into the annular protruding portion, and a second sealing ring is arranged between the extension section and the annular protruding portion.

[0016] In one embodiment, the flow-through area of the interlayer flow channel is larger than that of the central flow channel.

[0017] The present utility model provides a water purification device, which includes a reverse osmosis filtration assembly. The reverse osmosis filtration assembly includes a filter bottle, a reverse osmosis filter element, and a central tube. The filter bottle has an upper end and a lower end. An inlet, an outlet, and a wastewater outlet are provided at the upper end of the filter bottle; the reverse osmosis filter element is arranged inside the filter bottle; the reverse osmosis filter element is sleeved on the central tube. A central flow channel and an interlayer flow channel are separately provided inside the central tube. The interlayer flow channel is located outside the central flow channel. The central tube is provided with a plurality of first flow-through channels. The pure water side of the reverse osmosis filter element is communicated with the central flow channel through the first flow-through channels. The first flow-through channels and the interlayer flow channel are separately arranged; wherein, the plurality of first flow-through channels are communicated with the outlet through the central flow channel, and the wastewater side of the reverse osmosis filter element is communicated with the wastewater outlet through the interlayer flow channel.

[0018] The technical solution of the present utility model is to provide a central tube with a separately arranged central flow channel and an interlayer flow channel. The interlayer flow channel and the central flow channel are respectively used to discharge the pure water and wastewater filtered by the reverse osmosis filter element. In this way, the wastewater flow path originally located inside the reverse osmosis filter element can be moved to the central tube, thereby avoiding the mutual interference between the wastewater flow path and the raw water water path of the reverse osmosis filter element, and thus improving the pure water outlet efficiency of the reverse osmosis filter element. 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 is a schematic structural diagram of the reverse osmosis filtration assembly provided by the present utility model;

[0021] Figure 2 is Figure 1 an exploded view of

[0022] Figure 3 is a schematic structural diagram of the reverse osmosis filtration assembly from a certain cross-sectional perspective;

[0023] Figure 4 is Figure 3 an enlarged view of part B in

[0024] Figure 5 is Figure 3 an enlarged view of part A in

[0025] Figure 6It is a schematic structural separation diagram of a first filter element cover, a second filter element cover, a reverse osmosis filter element, and a central pipe;

[0026] Figure 7 It is Figure 6 a schematic structural diagram of the central pipe;

[0027] Figure 8 It is a schematic structural diagram of the central pipe from a certain cross-sectional perspective;

[0028] Figure 9 It is a schematic structural diagram of the central pipe from another cross-sectional perspective.

[0029] Explanation of the reference numerals in the drawings:

[0030] 100, reverse osmosis filtration assembly; 1, filter bottle; 11, bottle body; 12, top cover; 121, water inlet; 122, water outlet; 123, waste water outlet; 13, bottom cover; 14, annular protrusion; 2, reverse osmosis filter element; 21, pure water side; 22, waste water side; 3, central pipe; 3a, central flow channel; 3b, interlayer flow channel; 3c, first flow-through channel; 3d, flow expansion cavity; 31, outer pipe; 311, flow-through port; 312, water passing hole; 313, extension section; 313a, second accommodation groove; 32, inner pipe; 33, connection section; 34, cut-off plate; 4, first filter element cover; 4a, second flow-through channel; 41, sink; 411, first accommodation groove; 42, surface; 421, annular rib; 5, second filter element cover; 5a, water inlet cavity; 5b, waste water cavity; 51, first partition; 52, second partition; 61, first sealing ring; 62, second sealing ring.

[0031] The realization, functional features, and advantages of the purpose of the present utility model will be further described in conjunction with embodiments with reference to the accompanying drawings. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with 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 of 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 fall within the protection scope of the present utility model.

[0033] 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.

[0034] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying 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 scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. 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.

[0035] With the public's pursuit of the quality of life, the quality of water has begun to attract much attention. The water purification equipment with reverse osmosis function is becoming more and more popular among the public because the purified water produced by it is fresher, more hygienic and safer. The raw water usually has a high TDS. Under the action of a booster pump, the reverse osmosis filter element can block a large number of ions in the raw water in front of the osmosis membrane, and then discharge a large number of ions through the wastewater, so that the TDS of the water passing through the osmosis membrane meets the standard of direct drinking water. At present, the pure water water path and the wastewater water path of the existing reverse osmosis filter element are both concentrated in the position close to the inner side of the reverse osmosis filter element, which will cause cross-contamination between the wastewater and the raw water. If pollution is to be avoided, a more complex flow path needs to be designed inside the filter element, thus increasing the manufacturing cost of the filter element.

[0036] The aforementioned TDS refers to Total Dissolved Solids (English: Total dissolved solids, abbreviated as TDS), also known as the total amount of dissolved solids, and the measurement unit is milligrams per liter (mg / L), which indicates how many milligrams of dissolved solids are dissolved in 1 liter of water. The higher the TDS value, the more dissolved substances are contained in the water.

[0037] In view of this, the present utility model proposes a reverse osmosis filtration assembly 100 for installation in a water purification device to filter the raw water passing through it, so that after the water quality meets the user's requirements, the raw water water path, the wastewater water path and the water outlet water path of the reverse osmosis filter element 2 are arranged more reasonably to prevent cross-contamination between the water paths.

[0038] Please refer to Figures 1 to 3, in an embodiment of the present utility model, the reverse osmosis filtration assembly 100 includes a filter bottle 1, a reverse osmosis filter element 2, and a central tube 3. The filter bottle 1 has an upper end and a lower end. An inlet 121, an outlet 122, and a wastewater outlet 123 are provided at the upper end of the filter bottle 1. The reverse osmosis filter element 2 is disposed inside the filter bottle 1. The reverse osmosis filter element 2 is sleeved on the central tube 3. A central flow channel 3a and an interlayer flow channel 3b that are separated from each other are provided inside the central tube 3. The interlayer flow channel 3b is located outside the central flow channel 3a. The central tube 3 is provided with a plurality of first flow-through channels 3c. The pure water side 21 of the reverse osmosis filter element 2 is communicated with the central flow channel 3a through the first flow-through channels 3c. The first flow-through channels 3c are separated from the interlayer flow channel 3b. Among them, the plurality of first flow-through channels 3c are communicated with the outlet 122 through the central flow channel 3a. The wastewater side 22 of the reverse osmosis filter element 2 is communicated with the wastewater outlet 123 through the interlayer flow channel 3b.

[0039] It should be noted that the positional relationship shown in the schematic diagram of the specification and described in the following specification text is only the position of the reverse osmosis filtration assembly 100 in a certain state. The installation method of the reverse osmosis filtration assembly 100 is to be installed on the water circuit board along the axial direction of the filter bottle 1. In other embodiments, the installation method of this product can also be vertically installed in the water circuit board. Among them, a receiving cavity is formed inside the filter bottle 1, and the receiving cavity is used to accommodate the reverse osmosis filter element 2 and other components of the reverse osmosis filtration assembly 100 to ensure that the reverse osmosis filtration assembly 100 is not interfered by the outside world. The filter bottle 1 is only communicated with the outside through the inlet 121, the outlet 122, and the wastewater outlet 123. The inlet 121 is a water inlet for allowing raw water (tap water or water filtered by a pre-filter element) from the outside to flow in. The wastewater outlet 123 is used to discharge the wastewater carrying a large amount of salt ions after being filtered by the reverse osmosis filter element 2. The outlet 122 is used to discharge the pure water (with a lower salt ion concentration) after being reverse osmosis filtered. Among them, in this embodiment, the filter bottle 1 includes a bottle body 11 in a hollow cylindrical shape. A top cover 12 and a bottom cover 13 are respectively provided at both ends of the bottle body 11 to block the openings at both ends of the bottle body 11. Among them, the top cover 12 and the bottle body 11 can be adhesively bonded or welded, and no specific limitation is made here. The bottom cover 13 and the bottle body 11 are fixed together by rotational welding, thereby enhancing the overall structural strength of the filter bottle 1.

[0040] Among them, regulating valves are provided in the water inlet 121, water outlet 122, and wastewater outlet 123, and the opening degrees of the water inlet 121, water outlet 122, and wastewater outlet 123 can be adjusted through the regulating valves. Of course, the regulating valves can also be respectively arranged in the external water circuits communicating with the water inlet 121, water outlet 122, and wastewater outlet 123 to meet the actual operation requirements of the water purification device. The filter bottle 1 proposed by the present utility model has two ends in its axial direction. The end of the filter bottle 1 where the water inlet 121, water outlet 122, and wastewater outlet 123 are opened is the upper end of the filter bottle 1, and the opposite end of the filter bottle 1 is the lower end of the filter bottle 1.

[0041] Specifically, the reverse osmosis filter element 2 is arranged in a columnar shape. The reverse osmosis filter element 2 is made by a rolling process, which makes the water flow easily pass through the axial space of the reverse osmosis filter element 2. When the water flow passes through the reverse osmosis filter element 2 in the radial direction, it needs to pass through the RO membrane of the reverse osmosis filter element 2, thereby filtering the salt ions in the water outside the RO membrane. A central tube 3 is arranged inside the reverse osmosis filter element 2. The central tube 3 has the function of supporting the inside of the reverse osmosis filter element 2, preventing the reverse osmosis filter element 2 from deforming due to excessive water pressure, and thus ensuring the smooth water outlet path of the reverse osmosis filter element 2. The reverse osmosis filter element 2 has a pure water side 21 and a wastewater side 22. The pure water side 21 is the position where the filtered pure water flows out of the reverse osmosis filter element 2. The pure water side 21 of the reverse osmosis filter element 2 is located inside the reverse osmosis filter element 2. The wastewater side 22 is the position where the wastewater containing high-concentration salt ions flows out after filtration by the reverse osmosis filter element 2. The wastewater side 22 of the reverse osmosis filter element 2 is located at the lower end of the reverse osmosis filter element 2.

[0042] Further, please refer to Figure 3 、 Figure 7 、 Figure 8 and Figure 9 . There are two mutually separated flow channels inside the central tube 3, namely a central flow channel 3a and a sandwich flow channel 3b. The central flow channel 3a is located at the center of the central tube 3, and the sandwich flow channel 3b is located outside the central flow channel 3a. Among them, the central tube 3 can be separated by a cylinder body to separate the central flow channel 3a and the sandwich flow channel 3b, or can be realized by other structures, and no specific limitation is made here.

[0043] Among them, the central flow channel 3a is used to discharge the pure water filtered by the reverse osmosis filter element 2, and the sandwich flow channel 3b is used to discharge the remaining wastewater after the reverse osmosis filter element 2 is filtered (the wastewater has a high concentration of salt ions). The pure water filtered by the reverse osmosis filter element 2 flows into the central flow channel 3a through the first flow-through channel 3c opened in the central pipe 3, while the wastewater directly enters the sandwich flow channel 3b from the flow-through port 311. Moreover, the first filtration channel and the wastewater flow channel are separated from each other, so that the flow path of the pure water and the flow path of the wastewater are separated. Thus, the central pipe 3 can discharge both pure water and wastewater, further optimizing the water path of the reverse osmosis filtration assembly 100, and making the wastewater water path and the water path of the pure water after filtration of the reverse osmosis filter element 2 not interfere with each other, thereby ensuring the water outlet efficiency of the pure water after the reverse osmosis filter element 2 is filtered.

[0044] In addition, a flow-through port 311 is opened at the lower end of the central pipe 3. After the raw water water path enters the reverse osmosis filter element 2, it axially flows through the wastewater side 22 of the reverse osmosis filter element 2 and then flows into the sandwich flow channel 3b from the flow-through port 311 to carry out the salt ions in the reverse osmosis filter element 2.

[0045] This reverse osmosis filtration assembly 100 is used in a water purification device. In addition to reverse osmosis filtration, a pre-filter element is also provided upstream of the water inlet 121, that is, the water entering the water inlet 121 is filtered by the pre-filter element. When the pre-filter element filters the water, the pre-filter element will adsorb the larger particulate impurities in the water and initially filter the raw water, and then filter out most of the salt ions in the water through the RO membrane of the reverse osmosis filter element 2. In addition, a post-filter element is also provided downstream of the water outlet 122, that is, the water filtered by the reverse osmosis filtration assembly 100 is filtered by the post-filter element to remove color and adjust the taste and then flows out through the faucet.

[0046] Among them, in this embodiment, the reverse osmosis filtration assembly 100 is integrally integrated in the filter bottle 1. Of course, the pre-filter element, the post-filter element, and the reverse osmosis filter element 2 can also be integrally integrated in the filter bottle 1.

[0047] The technical solution of the present utility model is to adopt a central pipe 3 provided with a central flow channel 3a and a sandwich flow channel 3b that are separated from each other. The sandwich flow channel 3b and the central flow channel 3a are respectively used to discharge the pure water and the wastewater filtered by the reverse osmosis filter element 2. In this way, the wastewater flow path originally located inside the reverse osmosis filter element 2 can be moved to the central pipe 3, thereby avoiding the interference between the wastewater flow path of the reverse osmosis filter element 2 and the raw water water path, and thus improving the pure water outlet efficiency of the reverse osmosis filter element 2.

[0048] In one embodiment, please continue to refer to Figure 3 、 Figure 7 、 Figures 8 to 9, the central tube 3 includes an outer tube 31, an inner tube 32 and a connecting section 33. The outer tube 31 and the inner tube 32 are connected by the connecting section 33. The central flow channel 3a is formed inside the inner tube 32. The sandwich flow channel 3b is formed between the inner tube 32 and the outer tube 31. The first flow-through channel 3c is formed in the connecting section 33. The flow-through port 311 is opened on the outer tube 31.

[0049] It should be noted that the inner tube 32 and the outer tube 31 are provided. Both the inner tube 32 and the outer tube 31 are arranged in a circular tube shape. The outer tube 31 is sleeved outside the inner tube 32. The central flow channel 3a is located inside the inner tube 32. The sandwich flow channel 3b is located between the outer tube 31 and the inner tube 32. That is, the central flow channel 3a and the sandwich flow channel 3b are separated by the inner tube 32, so that the central flow channel 3a and the sandwich flow channel 3b are not connected to each other. And the connecting section 33 is located between the inner tube 32 and the outer tube 31. The outside of the outer tube 31 and the inside of the inner tube 32 are connected through the connecting section 33. That is, the pure water side 21 of the reverse osmosis filter element 2 and the water outlet flow channel are connected. The connecting section 33 has an outer wall, so that the first flow-through channel 3c in the connecting section 33 is separated from the sandwich flow channel 3b outside the connecting section 33. Considering that the flow-through port 311 is used to connect the waste water side 22 of the reverse osmosis filter element 2 with the sandwich layer, and the sandwich flow channel 3b is located between the inner tube 32 and the outer tube 31, the flow-through port 311 is opened on the outer tube 31, so that the raw water flowing in from the upper end of the reverse osmosis filter element 2 flows axially through the entire reverse osmosis filter element 2 to carry out the high-concentration salt ions in the reverse osmosis filter element 2.

[0050] In one embodiment, please refer to Figure 3 , Figure 4 and Figure 6 , the reverse osmosis filtration assembly 100 further includes a first filter element cover 4. The first filter element cover 4 is connected to the lower end of the reverse osmosis filter element 2. The inner tube 32 is exposed at the lower end of the outer tube 31. The first filter element cover 4 is provided with a sink 41 corresponding to the inner tube 32. At least a part of the inner tube 32 extends into the sink 41. A first sealing ring 61 is arranged between the wall of the sink 41 and the outer wall of the inner tube 32.

[0051] It should be noted that considering that the reverse osmosis filter element 2 will be soaked by the incoming raw water during operation, and the incoming raw water has a certain pressure. In order to prevent the reverse osmosis filter element 2 from deforming, the first filter element cover 4 is provided. The first filter element cover 4 is glued to the reverse osmosis filter element 2, and the outer periphery of the first filter element cover 4 is glued to the outer periphery of the reverse osmosis filter element 2, so as to maintain the shape of the reverse osmosis filter element 2 in the filtration mode.

[0052] It is considered that in order to prevent the interlayer flow channel 3b and the central flow channel 3a in the central pipe 3 from interfering with each other, a sunk groove 41 is formed on the first filter element cover 4, and a first sealing ring 61 is arranged between the groove wall of the sunk groove 41 and the outer wall of the inner pipe 32. Through the first sealing ring 61, the central flow channel 3a and the interlayer flow channel 3b at the lower end of the central pipe 3 are made not to communicate with each other, so as to prevent the wastewater in the interlayer flow channel 3b from polluting the pure water in the central flow channel 3a. Further, a first accommodation groove 411 is formed on the groove wall of the sunk groove 41, and the first accommodation groove 411 is used for accommodating the first sealing ring 61, so that the first sealing ring 61 partially protrudes from the first accommodation groove 411, and thus forms an interference fit with the inner pipe 32 to achieve sealing.

[0053] In one embodiment, please continue to refer to Figure 3 、 Figure 4 and Figure 6 , the first filter element cover 4 has a surface 42 facing the side of the reverse osmosis filter element 2, and an annular rib 421 protrudes from the surface 42, so that the reverse osmosis filter element 2 and the first filter element cover 4 enclose a second flow channel 4a, and the second flow channel 4a communicates with the through-flow port 311.

[0054] Specifically, the side of the reverse osmosis filter element 2 close to the first filter element cover 4, that is, the water outlet side of the reverse osmosis filter element 2. In order to enable the water output from the reverse osmosis filter element 2 to efficiently flow into the through-flow port 311, an annular rib 421 protrudes from the surface 42 of the first filter element cover 4. This annular rib 421 abuts against the reverse osmosis filter element 2, so that an annular rib 421, the surface 42 of the first filter element cover 4 and the reverse osmosis filter element 2 enclose a second flow channel 4a.

[0055] In one embodiment, please refer to Figure 3 、 Figure 5 and Figure 6 , the reverse osmosis filtration assembly 100 further includes a second filter element cover 5. The second filter element cover 5 is connected to the upper end of the reverse osmosis filter element 2. The second filter element cover 5 protrudes with a first partition portion 51 and a second partition portion 52. The second partition portion 52 is located outside the first partition portion 51. The first partition portion 51 and the second partition portion 52 sequentially partition an inlet chamber 5a and a wastewater chamber 5b from the outside to the inside. The inlet chamber 5a communicates with the water inlet side of the reverse osmosis filter element 2, and the wastewater port 123 communicates with the interlayer flow channel 3b through the wastewater chamber 5b.

[0056] More specifically, the first filter element cover 4 is disposed at the lower end of the reverse osmosis filtration assembly 100. Correspondingly, the second filter element cover 5 is disposed at the upper end of the reverse osmosis filtration assembly 100. The second filter element cover 5 is also adhesively bonded to the reverse osmosis filter element 2, and the second filter element cover 5 has an outer peripheral extension portion, and the outer peripheral extension portion of the second filter element cover 5 is also adhesively bonded to the outer periphery of the reverse osmosis filter element 2, so as to maintain the state of the reverse osmosis filter element 2 in the filtration mode. Wherein, the second filter element cover 5 protrudes in a direction away from the reverse osmosis filter element 2 and is provided with a first partition portion 51 and a second partition portion 52. The first partition portion 51 and the second partition portion 52 divide two chambers from the inside to the outside, namely a water inlet chamber 5a and a wastewater chamber 5b. The water inlet chamber 5a is used to introduce the raw water flowing in from the water inlet 121 to the water inlet side of the reverse osmosis filter element 2, and the wastewater chamber 5b is used to introduce the wastewater in the wastewater flow channel to the wastewater outlet 123, so as to further improve the flow path in the reverse osmosis filter element 2.

[0057] In one embodiment, please refer to Figure 5 , the central tube 3 further includes a cut-off plate 34. The cut-off plate 34 is respectively connected to the inner tube 32 and the outer tube 31 to block the upper end of the interlayer flow channel 3b. The outer tube 31 is provided with a water passing hole 312 communicating with the wastewater chamber 5b.

[0058] It should be noted that, in order to separate the central flow channel 3a and the interlayer flow channel 3b at the upper end of the central tube 3, the central tube 3 is further provided with a cut-off plate 34. The cut-off plate 34 is respectively connected to the inner tube 32 and the outer tube 31, so as to block the upper end of the interlayer flow channel 3b and prevent the wastewater in the interlayer flow channel 3b from polluting the central flow channel 3a. By providing a water passing hole 312 communicating with the wastewater chamber 5b in the outer tube 31, the wastewater in the interlayer flow channel 3b is discharged into the wastewater chamber 5b through the water passing hole, and finally flows out of the filter bottle 1 from the wastewater outlet 123.

[0059] In one embodiment, please continue to refer to Figure 5 , the outer tube 31 extends upward from the cut-off plate 34 to form an extension section 313. The extension section 313, the cut-off plate 34 and the second filter element cover 5 enclose an expanded flow chamber 3d, and the expanded flow chamber 3d communicates with the central flow channel 3a.

[0060] It should be noted that the extension section 313 is coaxial with the outer tube 31, and the inner diameter of the extension section 313 is the same as that of the outer tube 31. Therefore, the inner diameter of the extension section 313 is larger than that of the inner tube 32. In this way, the expanded flow chamber 3d enclosed by the extension section 313, the cut-off plate 34 and the second filter element cover 5 has the function of expanding the flow channel relative to the central flow channel 3a, so that the water flowing out of the central flow channel 3a can flow into the next filter element for filtration or flow to the faucet with a larger flow rate.

[0061] In one embodiment, please continue to refer to Figure 5, the filter bottle 1 is provided with a downward annular convex portion 14, the extension section 313 is inserted into the annular convex portion 14, and a second sealing ring 62 is arranged between the extension section 313 and the annular convex portion 14.

[0062] Specifically, the filter bottle 1 is provided with an annular convex portion 14 adapted to the extension section 313, so that the extension section 313 can be inserted into the annular convex portion 14, and a second sealing ring 62 is arranged between the extension section 313 and the annular convex portion 14 to form a sealing fit, preventing the pure water in the flow expansion cavity 3d from exchanging with the waste water in the waste water cavity 5b of the filter bottle 1. More specifically, a second accommodation groove 313a is formed on the outer wall of the extension section 313, so that the second sealing ring 62 can be partially accommodated in the second accommodation groove 313a, and the other part of the second sealing ring 62 is exposed from the notch of the second accommodation groove 313a and is in interference fit sealing with the annular convex portion 14. In other embodiments, it may also be that the annular convex portion 14 is inserted into the extension section 313, so that a sealing fit is formed between the outer wall of the annular convex portion 14 and the inner wall of the extension section 313.

[0063] In one embodiment, please refer to Figure 3 and Figure 9 , the flow-through area of the interlayer flow channel 3b is larger than that of the central flow channel 3a. Considering that during the filtration process of the reverse osmosis filter element 2, the ratio of the water output of the waste water to the pure water is approximately 3:1, the flow-through area of the interlayer flow channel 3b for discharging waste water is set to be larger than that of the central flow channel 3a for discharging pure water.

[0064] The present utility model also provides a water purification device, which includes a reverse osmosis filtration assembly 100. The specific structure of the reverse osmosis filtration assembly 100 refers to the above embodiments. Since this water purification device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here. Among them, this water purification device can be products with water purification functions such as water purifiers, water dispensers, soft and clean integrated machines, and clean and heat integrated machines.

[0065] The above description 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 direct / indirect application 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 filter bottle has an upper end and a lower end, and the upper end of the filter bottle is provided with a water inlet, a water outlet and a wastewater outlet; A reverse osmosis filter element is arranged in the filter bottle; A central tube, the reverse osmosis filter element is sleeved in the central tube, a central flow channel and an interlayer flow channel separated from each other are opened in the central tube, the interlayer flow channel is located outside the central flow channel, the central tube is opened with a plurality of first flow passages, the pure water side of the reverse osmosis filter element is connected with the central flow channel through the first flow passages, and the first flow passages are separated from the interlayer flow channels; Wherein, the plurality of first flow passages are connected to the water outlet via the central flow channel, and the wastewater side of the reverse osmosis filter element is connected to the wastewater outlet via the interlayer flow channel.

2. The reverse osmosis filtration assembly according to claim 1, characterized in that The central tube includes an outer tube, an inner tube and a connecting section, the outer tube and the inner tube are connected through the connecting section, the central flow channel is formed inside the inner tube, the interlayer flow channel is formed between the inner tube and the outer tube, the first flow channel is formed in the connecting section, and the outer tube is provided with a flow opening.

3. The reverse osmosis filtration assembly according to claim 2, characterized in that: The reverse osmosis filtration assembly also includes a first filter element cover, which is connected to the lower end of the reverse osmosis filter element. The inner tube is exposed at the lower end of the outer tube. The first filter element cover is provided with a sink groove corresponding to the inner tube. The inner tube at least partially extends into the sink groove. A first sealing ring is provided between the groove wall of the sink groove and the outer wall of the inner tube.

4. The reverse osmosis filtration assembly according to claim 3, characterized in that: The first filter element cover has a surface facing the reverse osmosis filter element, and the surface is protrudingly provided with an annular rib so that the reverse osmosis filter element and the first filter element cover are enclosed to form a second flow passage, and the second flow passage is connected to the flow port.

5. The reverse osmosis filtration assembly according to claim 4, characterized in that: The reverse osmosis filtration assembly also includes a second filter element cover, which is connected to the upper end of the reverse osmosis filter element. The second filter element cover is protrudingly provided with a first partition and a second partition, the second partition is located on the outside of the first partition, and the first partition and the second partition are sequentially separated into a water inlet chamber and a wastewater chamber from the outside to the inside, the water inlet chamber is connected to the water inlet side of the reverse osmosis filter element, and the wastewater port is connected to the interlayer flow channel through the wastewater chamber.

6. The reverse osmosis filtration assembly according to claim 5, characterized in that: The central tube further comprises a stop plate, which is respectively connected to the inner tube and the outer tube to block the upper end of the sandwich flow channel, and the outer tube is provided with a water hole communicating with the wastewater cavity.

7. The reverse osmosis filtration assembly according to claim 6, characterized in that: The outer tube extends upward from the stop plate to form an extension section, and the extension section, the stop plate and the second filter element cover together form a flow expansion cavity, and the flow expansion cavity is connected to the central flow channel.

8. The reverse osmosis filtration assembly according to claim 7, characterized in that: The filter bottle is provided with an annular protrusion downward, the extension section is inserted into the annular protrusion, and a second sealing ring is provided between the extension section and the annular protrusion.

9. The reverse osmosis filtration assembly according to claim 1, characterized in that: The flow area of ​​the sandwich flow channel is larger than the flow area of ​​the central flow channel.

10. A water purification device, characterized in that: It comprises the reverse osmosis filtration component according to any one of claims 1 to 9.

Images