Filter element and water purification equipment

Abstract

The utility model discloses a filter element and water purification equipment, and relates to the technical field of water purification, the filter element comprises a first filter assembly and a second filter assembly, the first filter assembly comprises a first filter bottle and a first filter element, the first filter element is arranged in the first filter bottle, and a water inlet channel is formed between the first filter element and the inner wall of the first filter bottle; the second filtering assembly comprises a second filtering bottle, a second filtering element and a bag body, a first cavity and a second cavity are formed in the second filtering bottle, the second filtering element is arranged in the first cavity, and a second water passing channel is formed between the inner wall of the first cavity and the second filtering element; a water outlet channel is formed in the middle of the second filter element, the water outlet channel is communicated with the second cavity and the first water passing channel, and the bag body is arranged in the second cavity; the bag body is compressed when being pressed, and the bag body is restored when the pressure is relieved. According to the technical scheme, the bag body is additionally arranged, so that pure water backflow is achieved, and the TDS value of the first cup of water is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water purification, in particular to a filter element and a water purification device. BACKGROUND

[0002] With the pursuit of the public for the quality of life, the level of water quality begins to be concerned, and the water purification device with the reverse osmosis function is more and more popular because the pure water produced by the water purification device is fresher, healthier and safer. The raw water usually has a high TDS, and the reverse osmosis filter element can block a large number of ions in the raw water in front of the permeation membrane under the action of the booster pump, so that the TDS of the water passing through the permeation membrane meets the standard of direct drinking water. However, when the water purification device is shut down for a long time and then restarted for use, the TDS of the first cup of pure water is high, which causes the quality of the first cup of pure water to be low, and the water quality cannot meet the needs of the user. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a filter element and a water purification device, which aims to solve the problem that the TDS of the first cup of pure water is high when the existing water purification device is shut down for a long time and then restarted for use.

[0004] To achieve the above-mentioned purpose, the filter element provided by the present application comprises:

[0005] A first filter assembly comprises a first filter bottle and a first filter element, the first filter element is arranged in the first filter bottle, a water inlet channel is formed between the first filter element and the inner wall of the first filter bottle, and a first water outlet channel is formed on the side of the first filter element away from the water inlet channel;

[0006] A second filter assembly comprises a second filter bottle, a second filter element and a capsule, the inside of the second filter bottle forms a first cavity and a second cavity, the second filter element is arranged in the first cavity, a second water outlet channel is formed between the inner wall of the first cavity and the second filter element, a water outlet channel is formed in the middle of the second filter element, the water outlet channel is in communication with the second cavity and the first water outlet channel respectively, and the capsule is arranged in the second cavity; when the capsule is subjected to water pressure, it is compressed and deformed away from the second cavity, and when the water pressure on the capsule is removed, the deformation of the capsule is restored.

[0007] In an embodiment, the capsule comprises a plurality of folding parts and a connecting port at one end of the capsule, the connecting port is in sealing connection with the inner wall of the second cavity, a water storage space is formed between the outer surface of the capsule and the inner wall of the second cavity, and the water storage space is in communication with the first cavity.

[0008] In an embodiment, a plurality of water inlet holes are arranged on the inner wall of the side of the first cavity close to the second cavity, and the water inlet holes are in communication with the second cavity.

[0009] In an embodiment, the capsule is provided with an abutting protrusion on the end face away from the connecting port, the abutting protrusion abutting with the inner wall of one side of the second cavity; the water inlet hole is towards the periphery of the abutting protrusion; and / or,

[0010] The end face of the capsule away from the connecting port is provided with an arc surface.

[0011] In an embodiment, the second filter bottle comprises a first bottle body and a first end cap, one end of the first bottle body is detachably connected with the first end cap, the first end cap is provided with a mounting groove, the connecting port of the capsule is located in the mounting groove, and the end of the first bottle body presses the connecting port of the capsule against the inner wall of the mounting groove; and / or,

[0012] The second filter assembly is arranged in the interior of the first filter bottle; the outer surface of the second filter bottle is provided with a mounting boss, the first filter core is sleeved on the outer surface of the first filter bottle, one end of the first filter core abuts against the mounting boss, and the other end of the first filter core abuts against the inner wall of one end of the first filter bottle.

[0013] In an embodiment, the first filter bottle is provided with a water inlet, a water outlet and a waste water outlet, the water inlet and the waste water outlet are respectively communicated with the water inlet channel; and the water outlet is communicated with the water outlet channel.

[0014] In an embodiment, the second filter core comprises a carbon material filter cylinder, a first filter core cap and a second filter core cap, the first filter core cap and the second filter core cap are respectively connected with two ends of the carbon material filter cylinder, the first filter core cap is located at one end of the carbon material filter cylinder away from the capsule, and the carbon material filter cylinder is provided with the water outlet channel in the middle part; the interior of the first filter core cap is formed with a third water passing channel communicated with the second water outlet channel, the interior of the first filter bottle has a first extension section extending towards the first filter core cap, the first filter core cap is sealingly connected with the first extension section, and the first extension section is communicated with the water outlet.

[0015] In an embodiment, the second filter bottle further comprises a second end cap, the second end cap is connected with one end of the first bottle body away from the first end cap; the interior of the first filter bottle has a second extension section extending towards the second end cap, the second end cap is sealingly connected with the second extension section, a fourth water passing channel is formed between the first extension section and the second extension section, and the fourth water passing channel is respectively communicated with the first water passing channel and the second water passing channel.

[0016] In an embodiment, the first filter core comprises a reverse osmosis membrane layer and a third filter core cover connected with one end of the reverse osmosis membrane layer; the first filter bottle has a third extension section extending towards the third filter core cover, the third filter core cover is sealingly connected to the third extension section, a fifth water passing channel is formed between the third extension section and the second extension section, and the fifth water passing channel is in communication with the fourth water passing channel and the first water passing channel respectively; and / or,

[0017] The first filter bottle comprises a second bottle body and a third end cover, the second bottle body is detachably connected with the third end cover; the second filter assembly is arranged in the second bottle body, the first filter core is located between the first filter bottle and the second filter bottle; the water inlet and the water outlet are arranged at one end of the second bottle body away from the third filter core cover.

[0018] The application also provides a water purification device comprising the filter core as described above.

[0019] The technical scheme of the application improves the filtering effect of water and reduces the TDS value of water by using the first filter assembly and the second filter assembly to filter water twice. Further, the TDS value of the first cup of water and the water quality are improved by adding the capsule and realizing the reverse flow of pure water through pressure change. Specifically, water enters from the water inlet channel, is filtered by the first filter core, enters the second water passing channel through the first water passing channel, is filtered by the second filter core, and then is output as pure water from the water outlet channel. In order to reduce the TDS value of the first cup of water taken by a user, the first cavity and the second cavity are formed in the second filter bottle, the second filter core is arranged in the first cavity, and the capsule is arranged in the second cavity. The capsule is compressed towards the side away from the second cavity under pressure, and the capsule restores when the pressure is released. When the filter core is activated and in a filtering state, the pure water in the water outlet channel flows to the second cavity and compresses the capsule. When the filter core is deactivated and the filtering state is released, the pressure generated by the water flow is removed from the capsule, the capsule gradually restores, and the pure water in the second cavity is squeezed into the first cavity by the gradually restoring capsule, so that the pure water realizes reverse flow, and the proportion of pure water in the first filter core and the second filter core increases, the TDS concentration of the first filter core and the second filter core decreases, and the TDS value of the first cup of water taken by the user decreases. The capsule can be effectively compressed under pressure and quickly restored when the pressure is released, so that the capsule can realize a large volume change in a short time, thereby more effectively promoting the reverse flow of water flow back into the first cavity and improving the water quality. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor.

[0021] Fig. 1 The structural schematic diagram of an embodiment of the filter element provided by the present application is shown in the figure.

[0022] Fig. 2 The end structural schematic diagram of an embodiment of the filter element provided by the present application is shown in the figure.

[0023] Fig. 3 The explosion structural schematic diagram of an embodiment of the filter element provided by the present application is shown in the figure.

[0024] Explanation of the reference signs:

[0025] 1, first filter assembly; 11, first filter bottle; 111, water inlet; 112, water outlet; 113, waste water outlet; 114, second bottle body; 115, third end cover; 116, first extension section; 117, second extension section; 118, third extension section; 119, fourth water passing channel; 120, fifth water passing channel; 12, first filter element; 121, reverse osmosis membrane layer; 122, third filter element cover; 13, water inlet channel; 14, first water passing channel; 2, second filter assembly; 21, second filter bottle; 211, first cavity; 212, second cavity; 213, water inlet hole; 214, first bottle body; 215, first end cover; 2151, mounting groove; 216, mounting boss; 217, second end cover; 22, second filter element; 221, carbon material filter cartridge; 222, first filter element cover; 2221, third water passing channel; 223, second filter element cover; 23, capsule body; 231, folding part; 232, connecting port; 233, abutting convex part; 234, arc surface; 24, second water passing channel; 25, water outlet channel.

[0026] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments only represent some embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0028] It should be noted that if the application embodiments have directionality indications (such as up, down, left, right, front, back, etc.), the directionality indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directionality indications also change accordingly.

[0029] In addition, if the application embodiments have descriptions of "first", "second", etc., the "first", "second", etc. descriptions are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes include A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the application.

[0030] With the pursuit of the quality of life of the public, the level of water quality begins to be concerned, the water purification equipment with reverse osmosis function is more and more popular with the public because of its fresh, safer and healthier pure water. The raw water usually has a high TDS, and the reverse osmosis filter element can block a large number of ions in the raw water in front of the permeation membrane under the action of the booster pump, so that the TDS of the water passing through the permeation membrane meets the standard of direct drinking water. However, when the water purification equipment is shut down for a long time, the TDS of the first cup of pure water is high when it is restarted, which causes the quality of the first cup of pure water to be low, and the water quality cannot meet the needs of users.

[0031] In order to solve the above problems, the application provides a filter element.

[0032] Please refer to Figs. 1 to 3In an embodiment of the present application, the filter element comprises a first filter assembly 1 and a second filter assembly 2. The first filter assembly 1 comprises a first filter bottle 11 and a first filter element 12. The first filter element 12 is arranged in the first filter bottle 11. A water inlet channel 13 is formed between the first filter element 12 and the inner wall of the first filter bottle 11. A first water outlet channel 14 is formed on the side of the first filter element 12 away from the water inlet channel 13. The second filter assembly 2 comprises a second filter bottle 21, a second filter element 22, and a capsule 23. The interior of the second filter bottle 21 forms a first cavity 211 and a second cavity 212. The second filter element 22 is arranged in the first cavity 211. A second water outlet channel 24 is formed between the second filter element 22 and the inner wall of the first cavity 211. A water outlet channel 25 is formed in the middle of the second filter element 22. The water outlet channel 25 is in communication with the second cavity 212 and the first water outlet channel 14, respectively. The capsule 23 is arranged in the second cavity 212. When the capsule 23 is subjected to water pressure, the capsule 23 is compressed and deformed away from the second cavity 212. When the water pressure on the capsule 23 is removed, the capsule 23 returns to its original shape.

[0033] In the above structure, the water is filtered twice by the first filter assembly 1 and the second filter assembly 2, thereby improving the filtering effect and reducing the TDS value of the water. Further, by adding the capsule 23, the volume of the capsule 23 is changed by pressure change to realize reverse flow of pure water, thereby reducing the TDS value of the first cup of water and improving water quality. Specifically, the water enters the water inlet channel 13, is filtered by the first filter element 12, enters the second water outlet channel 24 through the first water outlet channel 14, is filtered by the second filter element 22, and is output as pure water from the water outlet channel 25. In order to reduce the TDS value of the first cup of water taken by the user, the first cavity 211 and the second cavity 212 are formed in the interior of the second filter bottle 21. The second filter element 22 is arranged in the first cavity 211, and the capsule 23 is arranged in the second cavity 212. The capsule 23 is compressed away from the second cavity 212 under pressure. When the pressure is removed, the capsule 23 returns to its original shape. When the filter element is in use, the pure water in the water outlet channel 25 flows into the second cavity 212, generates pressure, and compresses the capsule 23. When the filter element is not in use, the pressure generated by the water flow is removed from the capsule 23, allowing the capsule 23 to gradually return to its original shape. The pure water in the second cavity 212 is squeezed into the first cavity 211 by the capsule 23 that is gradually returning to its original shape, causing the pure water to flow in reverse. This increases the proportion of pure water in the first filter element 12 and the second filter element 22, reduces the TDS concentration of the water remaining in the first filter element 12 and the second filter element 22, and reduces the TDS value of the first cup of water taken by the user. The capsule 23 can be effectively compressed under pressure and quickly return to its original shape when the pressure is released. This allows the capsule 23 to change its volume significantly in a short period of time, thereby more effectively driving the water flow to flow back into the first cavity 211.

[0034] It should be noted that the water entering the filter element is pressurized by a booster pump, so the water bladder entering the second chamber 212 is pressurized. When the filter element is activated and in filtration mode, the water pressure causes the bladder 23 to undergo compressive elastic deformation in the direction away from the water outlet, and the water storage space is filled with pure water. When the filter element is not in use, the air pressure in the second chamber 212 gradually returns to normal, so the bladder 23 gradually recovers its elasticity, causing the pure water in the first chamber 211 to flow back into the first chamber 211, thereby increasing the proportion of pure water in the first filter component 1 and the second filter component 2, and thus increasing the proportion of pure water in the first cup of water after the filter element has been used. The proportion of wastewater in the first filter element 12 is reduced. When the user collects the first cup of water next time, the TDS value is lower, improving the water quality and taste of the first cup of water and meeting the user's needs for purified water.

[0035] In one embodiment, the first filter element 12 is a reverse osmosis filter element, and the second filter element 22 is a post-filter element. The reverse osmosis filter element first removes most of the dissolved solids, microorganisms, bacteria, and other contaminants from the water, and then the post-filter element further filters the water after reverse osmosis filtration to remove any potentially remaining microparticles and chemicals. In this embodiment, the capsule 23 is an elastic structure filled with gas; its volume contracts under pressure and returns to its original size when the pressure is released.

[0036] It should be noted that the first filter element 12 is cylindrical, and the first filter bottle 11 is also cylindrical. The gap formed between the outer surface of the first filter element 12 and the inner wall of the first filter bottle 11 is the water inlet channel 13. The second filter element 22 is cylindrical, and the second filter bottle 21 is also cylindrical. The gap formed between the outer surface of the second filter element 22 and the inner wall of the second filter bottle 21 is the second water passage channel 24, and the gap formed between the outer surface of the second filter bottle 21 and the cylindrical inner wall of the first filter element 12 is the first water passage channel 14.

[0037] In one embodiment, the capsule 23 includes a plurality of folded portions 231 and a connection port 232 located at one end of the capsule 23. The connection port 232 is sealed to the inner wall of the second cavity 212. A water storage space is formed between the outer surface of the capsule 23 and the inner wall of the second cavity 212. The water storage space is in communication with the first cavity 211.

[0038] When the capsule 23 is subjected to pressure, the folded portion 231 of the capsule 23 is compressed, causing the volume of the capsule 23 to shrink, thereby increasing the water storage space and increasing the water content within the water storage space. When the pressure on the capsule 23 is released, the folded portion 231 of the capsule 23 unfolds, causing the volume of the capsule 23 to increase, and the water in the water storage space is squeezed back into the first cavity 211, achieving countercurrent flow. Through the compression and restoration of the capsule 23, countercurrent flow of water is achieved between the first cavity 211 and the second cavity 212, which refreshes the water in the first filter bottle 11 and the second filter bottle 21, thereby reducing the TDS concentration and helping to lower the TDS value of the first cup of water.

[0039] In one embodiment, the inner wall of the first cavity 211 near the second cavity 212 is provided with a plurality of water inlet holes 213, which are connected to the second cavity 212.

[0040] In the above structure, by adding a water inlet 213, the water flow can be evenly distributed from the first chamber 211 to the second chamber 212. When the filter cartridge is not in use, the pure water in the second chamber 212 can flow back to the first chamber 211 through the water inlet 213, thereby increasing the proportion of pure water inside the second filter cartridge 22, thereby increasing the amount of pure water in the first cup of water and reducing the TDS value of the first cup of water collected by the user next time.

[0041] In one embodiment, the end face of the bladder 23 away from the connection port 232 is provided with an abutting protrusion 233, which abuts against the inner wall of one side of the second cavity 212; the water inlet 213 faces the periphery of the abutting protrusion 233.

[0042] In the above structure, the water inlet 213 faces the periphery of the abutting protrusion 233, which can more effectively guide the water flow to the periphery of the bladder 23, allowing the water to fill the water storage space between the bladder 23 and the second cavity 212 more evenly. In addition, when the bladder 23 is in the inflated state, the abutting protrusion 233 abuts against the inner wall of the second cavity 212, enhancing the stability of the bladder 23 within the second cavity 212, ensuring that the countercurrent water can enter the first cavity 211 evenly through the water inlet 213, thus improving the countercurrent efficiency.

[0043] In one embodiment, the periphery of the end face of the capsule 23 away from the connection port 232 is provided with an arc surface 234.

[0044] In the above structure, the arc surface 234 of the capsule 23 makes the capsule 23 more flexible during expansion and contraction. At the same time, when the capsule 23 expands, it helps to evenly distribute the pressure to enhance the structural stability of the capsule 23. In addition, during the water counterflow, the arc surface 234 helps the water flow more smoothly from the second cavity 212 back to the first cavity 211, improving the counterflow efficiency.

[0045] In one embodiment, the second filter bottle 21 includes a first bottle body 214 and a first end cap 215. One end of the first bottle body 214 is detachably connected to the first end cap 215. The first end cap 215 is provided with a mounting groove 2151. The connection port 232 of the capsule 23 is located in the mounting groove 2151. The end of the first bottle body 214 presses the connection port 232 of the capsule 23 against the inner wall of the mounting groove 2151.

[0046] In the above structure, the first bottle body 214 and the first end cap 215 are detachably connected, so that the first bottle and the first end cap 215 can be disassembled for easy installation, maintenance and replacement of the capsule 23. In addition, by using the end of the first bottle body 214 to press the connection port 232 of the capsule 23 against the inner wall of the mounting groove 2151, the sealing performance between the capsule 23 and the second filter bottle 21 can be improved, the risk of gas leakage inside the capsule 23 can be reduced, and the capsule 23 can achieve the action of compression deformation and expansion recovery.

[0047] In one embodiment, the second filter assembly 2 is disposed inside the first filter bottle 11; the outer surface of the second filter bottle 21 is provided with a mounting boss 216, the first filter element 12 is sleeved on the outer surface of the first filter bottle 11, one end of the first filter element 12 abuts against the mounting boss 216, and the other end of the first filter element 12 abuts against the inner wall of one end of the first filter bottle 11.

[0048] In the above structure, the second filter component 2 is built into the first filter bottle 11, so that the first filter component 1 and the second filter component 2 are integrated. This reduces external connections, maximizes the use of limited space, and makes the entire filter element structure more compact. In addition, the mounting boss 216 provides mounting support for the first filter element 12, making the installation and disassembly of the first filter element 12 easier, and facilitating maintenance and replacement.

[0049] In one embodiment, the first filter bottle 11 is provided with an inlet 111, an outlet 112 and a wastewater outlet 113. The inlet 111 and the wastewater outlet 113 are respectively connected to the inlet channel 13; the outlet 112 is connected to the outlet channel 25.

[0050] In the above structure, by setting an inlet 111, an outlet 112, and a wastewater outlet 113, the first filter bottle 11 can realize water intake, water output, and wastewater discharge. The inlet 111 is directly connected to the inlet channel 13, ensuring that water can enter the inlet channel 13 for further filtration. The inlet channel 13 is arranged in a ring, with the wastewater outlet 113 and the inlet 111 located on opposite sides of the ring. After the water passes through the first filter element 12, impurities and pollutants are discharged through the wastewater outlet, maintaining the cleanliness of the first filter element 12 and ensuring its filtration efficiency. Placing the wastewater outlet 113 at the other end of the inlet channel 13 prevents pollutants from flowing back to the inlet 111, ensuring water quality cleanliness. The outlet 112 is connected to the outlet channel 25, allowing the filtered pure water to flow out smoothly.

[0051] In one embodiment, the second filter element 22 includes a carbon material filter cylinder 221, a first filter element 12 cover, and a second filter element 22 cover. The first filter element 12 cover and the second filter element 22 cover are respectively connected to both ends of the carbon material filter cylinder 221. The first filter element 12 cover is located at the end of the carbon material filter cylinder 221 away from the bladder 23. A water outlet channel 25 is provided in the middle of the carbon material filter cylinder 221. A third water passage 2221 communicating with the second water outlet channel 25 is formed inside the first filter element 12 cover. The first filter bottle 11 has a first extension section 116 extending toward the first filter element 12 cover inside. The first filter element 12 cover is sealed to the first extension section 116. The first extension section 116 is communicating with the water outlet 112.

[0052] In the above structure, the second filter element 22 integrates the carbon material filter cartridge 221, the first filter element 12 cover, and the second filter element 22 cover, forming a complete filtration unit. The carbon material filter cartridge 221, as the second filter element 22, can further purify the water filtered by the first filter element 12, improving water quality. The first filter element 12 cover and the second filter element 22 cover are connected to both ends of the carbon material filter cartridge 221, enhancing the structural stability of the carbon material filter cartridge 221 and enabling the second filter element 22 as a whole to withstand greater working pressure. Furthermore, through the first… The interior of the filter element 12 cover forms a third water passage 2221, allowing water filtered by the carbon material filter cartridge 221 to directly flow through the outlet channel 25 and the third water passage 2221, and exit from the outlet 112, facilitating the discharge of pure water. The first filter element 12 cover and the first extension section 116 are sealed together, facilitating the connection and installation of the second filter element 22 with the first filter bottle 11. This also ensures the overall sealing performance of the second filter element 22 under high pressure, preventing water leakage and improving the overall reliability and durability of the filter element. Specifically, the first filter element 12 cover and the first extension section 116 can be sealed by adhesive bonding or by a sealing ring. It should be noted that the carbon material filter cartridge 221 can be made of carbon fiber or activated carbon.

[0053] In one embodiment, the second filter bottle 21 further includes a second end cap 217, which is connected to the end of the first bottle body 214 away from the first end cap 215; the interior of the first filter bottle 11 has a second extension section 117 extending toward the second end cap 217, the second end cap 217 is sealed to the second extension section 117, and a fourth water passage 119 is formed between the first extension section 116 and the second extension section 117, which is connected to the first water passage 14 and the second water passage 24 respectively.

[0054] In the above structure, the two ends of the first bottle 214 are connected to the first end cap 215 and the second end cap 217 respectively to form the second filter bottle 21, which facilitates assembly and replacement and reduces maintenance costs and complexity. The connection between the second end cap 217 of the second filter bottle 21 and the second extension 117 of the first filter bottle 11 creates a dual filtration structure between the first filter assembly 1 and the second filter assembly 2. Water passes through multiple water passages when passing through different filter elements, preventing internal water flow from affecting the filtration effect. The added fourth water passage 119 allows water to flow smoothly between the first water passage 14 and the second water passage 24, improving water flow efficiency. Furthermore, the sealed connection between the second end cap 217 and the second extension 117 enhances the structural stability of the filtration system, preventing leakage and ensuring long-term stable operation of the filter elements. Specifically, the second end cap 217 and the second extension 117 can be sealed by adhesive bonding or by a sealing ring.

[0055] In one embodiment, the first filter element 12 includes a reverse osmosis membrane layer 121 and a third filter element cover 122, the third filter element cover 122 being connected to one end of the reverse osmosis membrane layer 121; the interior of the first filter bottle 11 has a third extension section 118 extending toward the third filter element cover 122, the third filter element cover 122 being sealed to the third extension section 118, a fifth water passage 120 being formed between the third extension section 118 and the second extension section 117, the fifth water passage 120 being connected to the fourth water passage 119 and the first water passage 14 respectively.

[0056] In the above structure, water enters the inlet channel 13 through the inlet 111, is filtered by the reverse osmosis membrane layer 121, enters the first water passage 14, then enters the fourth water passage 119 through the fifth water passage 120, and then enters the second water passage 24 through the fourth water passage 119 to continue filtration into the second filter element 22. The fifth water passage 120 is formed inside the third filter element cover 122, allowing the water filtered by the reverse osmosis membrane layer 121 to directly pass through the first water passage 14, the fifth water passage 120, and the fourth water passage 119, enter the second water passage 24, and then undergo secondary filtration through the second filter assembly 2. The connection between the third filter element cover 122 and the third extension section 118 provides additional structural stability, enabling the first filter element 12 to withstand greater operating pressure. In this embodiment, by integrating multiple water passages and extension sections, interference with the internal water flow is prevented, and the use of additional connectors and materials is reduced, thus lowering manufacturing costs. Specifically, the seal between the third filter cover 122 and the third extension 118 can be achieved by adhesive bonding or by sealing with a sealing ring.

[0057] In one embodiment, the first filter bottle 11 includes a second bottle body 114 and a third end cap 115, the second bottle body 114 and the third end cap 115 being detachably connected; the second filter assembly 2 is disposed inside the second bottle body 114, the first filter element 12 is located between the first filter bottle 11 and the second filter bottle 21, and the inlet 111 and the outlet 112 are disposed at the end of the second bottle body 114 away from the third filter element cap 122.

[0058] In the above structure, the second filter assembly 2 is integrated within the second bottle 114, which is composed of the second bottle 114 and the third end cap 115, making the entire filtration system more compact and simplifying the installation and operation process. By placing the first filter element 12 between the first filter bottle 11 and the second filter bottle 21, the water undergoes preliminary filtration before entering the second filter assembly 2, improving the overall water quality. The second bottle 114 and the third end cap 115 are detachably connected, allowing for quick replacement or maintenance of the first filter bottle 11 and facilitating the installation of the first filter element 12 and the second filter assembly 2 into the second bottle 114.

[0059] The technical solution of this application improves the filtration effect and reduces the TDS value of the water by using a first filter component 1 and a second filter component 2 for secondary filtration. Furthermore, by adding a capsule 23, pure water is allowed to flow back through pressure changes, further reducing the TDS value of the first cup of water and improving water quality. Specifically, water enters through the inlet channel 13, is filtered by the first filter element 12, then enters the second water passage 24 through the first water passage 14, and is filtered again by the second filter element 22 before being output as pure water through the outlet channel 25. To reduce the TDS value of the first cup of water received by the user, a first cavity 211 and a second cavity 212 are formed inside the second filter bottle 21. The second filter element 22 is placed in the first cavity 211, and the capsule 23 is placed in the second cavity 212. The capsule 23 is compressed towards the side away from the second cavity 212 under pressure, and returns to its original shape when the pressure is released. When the filter cartridge is activated and in filtration mode, pure water in the outlet channel 25 flows into the second chamber 212, compressing the capsule 23. When the filter cartridge is deactivated and filtration is lifted, the pressure generated by the water flow is released from the capsule 23, and the capsule 23 gradually recovers. The pure water in the second chamber 212 is squeezed into the first chamber 211 by the gradually recovering capsule 23, causing the pure water to flow backward. This increases the proportion of pure water in the first filter cartridge 12 and the second filter cartridge 22, reducing the TDS concentration in the first filter cartridge 12 and the second filter cartridge 22, thus lowering the TDS value of the first cup of water collected by the user. The capsule 23 can be effectively compressed under pressure and can quickly recover when released, allowing the capsule 23 to achieve a large volume change in a short time, thereby more effectively pushing the water back into the first chamber 211.

[0060] This application also proposes a water purification device, which includes a filter element. The specific structure of the filter element is as described in the above embodiments. Since this water purification device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0061] In one embodiment, a booster pump is also installed in the water purification device to pressurize the water entering the first filter element 12, thereby increasing the efficiency of the first filter element 12 in filtering pure water. When the user starts to draw water, the first filter element 12 is in working mode, with the inlet 111, outlet 112, and wastewater outlet 113 all open, and the first filter element 12 continuously filters out pure water. When the user stops drawing water, the outlet 112 immediately closes or gradually closes, the first inlet 111 remains open for a period of time, the wastewater outlet is in a normally open state, the pressure on the capsule 23 is released, and it expands and recovers from the compressed state. The pressure brought by the volume recovery of the capsule 23 squeezes some of the pure water in the water storage space back into the first cavity 211. The backflowing water flows through the second water passage 24 and the first water passage 14, thereby discharging a portion of the wastewater in the first filter element 12.

[0062] In one embodiment, the water purification device further includes a pressure sensor and a switching device. The pressure sensor is located inside the capsule 23, and the switching device is electrically connected to the pressure sensor. When the pressure sensor detects that the pressure inside the capsule 23 reaches a preset value, the switching device causes the water purification device to stop. After the water purification device stops, since the wastewater outlet is always open, the pressure in the capsule 23 needs to be released. The pure water in the second chamber 212 is gradually squeezed into the first chamber 211 by the gradually recovering capsule 23, so that the pure water achieves backflow.

[0063] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A filter element, characterized in that, include: The first filtration assembly includes a first filter bottle and a first filter element. The first filter element is disposed inside the first filter bottle. A water inlet channel is formed between the first filter element and the inner wall of the first filter bottle. A first water passage channel is formed on the side of the first filter element away from the water inlet channel. The second filtration assembly includes a second filter bottle, a second filter element, and a capsule. The interior of the second filter bottle forms a first cavity and a second cavity. The second filter element is disposed in the first cavity. A second water passage is formed between the inner wall of the first cavity and the second filter element. A water outlet is formed in the middle of the second filter element. The water outlet is connected to the second cavity and the first water passage, respectively. The capsule is disposed in the second cavity. When the capsule is subjected to water pressure, it is compressed and deformed towards the side away from the second cavity. When the water pressure is released, the deformation of the capsule is restored.

2. The filter element as described in claim 1, characterized in that, The capsule includes several folded portions and a connection port located at one end of the capsule. The connection port is sealed to the inner wall of the second cavity. A water-storing space is formed between the outer surface of the capsule and the inner wall of the second cavity. The water-storing space is in communication with the first cavity.

3. The filter element as described in claim 2, characterized in that, The inner wall of the first cavity near the second cavity is provided with several water inlet holes, which are connected to the second cavity.

4. The filter element as described in claim 3, characterized in that, The end face of the bladder away from the connection port is provided with an abutting protrusion, which abuts against one inner wall of the second cavity; the water inlet faces the periphery of the abutting protrusion; and / or, The periphery of the end face of the capsule away from the connection port is provided with an arc surface.

5. The filter element according to any one of claims 2 to 4, characterized in that, The second filter bottle includes a first bottle body and a first end cap. One end of the first bottle body is detachably connected to the first end cap. The first end cap is provided with a mounting groove. The connection port of the filter bag is located within the mounting groove. The end of the first bottle body presses the connection port of the filter bag against the inner wall of the mounting groove; and / or, The second filter assembly is disposed inside the first filter bottle; the outer surface of the second filter bottle is provided with a mounting boss, the first filter element is sleeved on the outer surface of the first filter bottle, one end of the first filter element abuts against the mounting boss, and the other end of the first filter element abuts against the inner wall of one end of the first filter bottle.

6. The filter element as described in claim 5, characterized in that, The first filter bottle is provided with an inlet, an outlet and a wastewater outlet, the inlet and the wastewater outlet are respectively connected to the inlet channel; the outlet is connected to the outlet channel.

7. The filter element as described in claim 6, characterized in that, The second filter element includes a carbon material filter cartridge, a first filter element cover, and a second filter element cover. The first filter element cover and the second filter element cover are respectively connected to both ends of the carbon material filter cartridge. The first filter element cover is located at the end of the carbon material filter cartridge away from the capsule. The water outlet channel is provided in the middle of the carbon material filter cartridge. A third water passage is formed inside the first filter element cover, which communicates with the second water outlet channel. The interior of the first filter bottle has a first extension section extending toward the first filter element cover. The first filter element cover is sealed to the first extension section, and the first extension section communicates with the water outlet.

8. The filter element as described in claim 7, characterized in that, The second filter bottle also includes a second end cap, which is connected to the end of the first bottle body away from the first end cap; the interior of the first filter bottle has a second extension section extending toward the second end cap, the second end cap is sealed to the second extension section, and a fourth water passage is formed between the first extension section and the second extension section, the fourth water passage being connected to the first water passage and the second water passage respectively.

9. The filter element as described in claim 8, characterized in that, The first filter element includes a reverse osmosis membrane layer and a third filter element cover, the third filter element cover being connected to one end of the reverse osmosis membrane layer; the interior of the first filter bottle has a third extension section extending toward the third filter element cover, the third filter element cover being sealed to the third extension section, a fifth water passage being formed between the third extension section and the second extension section, the fifth water passage being connected to the fourth water passage and the first water passage respectively; and / or, The first filter bottle includes a second bottle body and a third end cap, the second bottle body and the third end cap being detachably connected; the second filter assembly is disposed in the second bottle body, and the first filter element is located between the first filter bottle and the second filter bottle; the wastewater outlet is disposed in the third end cap, and the water inlet and the water outlet are disposed at the end of the second bottle body away from the third filter element cap.

10. A water purification device, characterized in that, Includes the filter element as described in any one of claims 1 to 9.

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