Water purifying apparatus

Abstract

The application discloses a water purification equipment, wherein the water purification equipment comprises a first filter assembly and a second filter assembly, the first filter assembly comprises a first filter bottle, a reverse osmosis filter core and a center pipe, the second filter assembly is in water communication with the first filter assembly, the second filter assembly comprises a second filter bottle, a post-filter core, a partition, an elastic element and a cylinder, one of the reverse osmosis filter core and the post-filter core is the post-filter core, and the other is the reverse osmosis filter core. The technical scheme of the application adopts the first filter assembly and the second filter assembly provided with backflow, so that the reverse osmosis filter core and the post-filter core both have the water storage and backflow function, the air bag cavity in the second filter assembly is formed by the elastic element and the cylinder, has stronger water storage and backflow effect, and the TDS value of the first cup of water after the water purification equipment is started is further reduced, and the taste of the first cup of water is improved.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, and in particular to a water purification device. Background Technology

[0002] As people increasingly pursue a higher quality of life, water quality has become a major concern. Water purifiers with reverse osmosis are gaining popularity because they produce fresher, more hygienic, and safer purified water. In existing water purifiers, the post-filter can return some of the filtered water to the reverse osmosis filter, ensuring that the water in the reverse osmosis filter still has a low TDS value even after the system has been shut down for a period of time. However, the current post-filters have poor return efficiency, only carrying a small amount of water back to the reverse osmosis filter, resulting in a relatively high TDS value for the first cup of water after the purifier is turned on. Summary of the Invention

[0003] The main objective of this invention is to provide a water purification device that aims to further improve the taste of the first cup of water after the device is turned on.

[0004] To achieve the above objectives, the water purification device proposed in this invention includes:

[0005] The first filtration assembly includes a first filter bottle, a reverse osmosis filter element, and a central tube. The first filter bottle has a first inlet and a first outlet. The reverse osmosis filter element is fitted into the central tube and disposed inside the first filter bottle. The outside of the reverse osmosis filter element is wrapped with a sealing layer. The central tube has a first flow channel connecting the pure water side of the reverse osmosis filter element. A water storage gap is formed between the first filter bottle and the reverse osmosis filter element. The central tube is connected to the water storage gap and the first outlet.

[0006] The second filter assembly is connected to the water path of the first filter assembly. The second filter assembly includes a second filter bottle, a post-filter element, a separator, an elastic element, and a cylinder. The separator is disposed inside the second filter bottle and divides the second filter bottle into a first chamber and a second chamber arranged vertically. The first chamber and the second chamber are connected to each other. The post-filter element is disposed in the first chamber. The elastic element is disposed in the second chamber. The cylinder is connected to the bottom of the separator. The elastic element and the cylinder form a compressible air bladder cavity.

[0007] When the water pump of the water purification equipment pressurizes, the gas in the water storage gap shrinks in volume due to water pressure, and the air bladder cavity shrinks in volume due to water pressure. When the water pump of the water purification equipment stops, the gas in the water storage gap returns to its original volume, and the air bladder cavity returns to its original volume.

[0008] In one embodiment, the central tube is provided with a central flow channel and a sandwich flow channel that are separated from each other. The first filter bottle is also provided with a wastewater outlet. The central flow channel is connected to the first flow channel and the first outlet, respectively. The sandwich flow channel is connected to the wastewater outlet and the wastewater side of the reverse osmosis filter element, respectively.

[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 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 passage is formed within the connecting section.

[0010] In one embodiment, the water purification device further includes a first filter cover, which is connected to the lower end of the reverse osmosis filter element. The inner tube protrudes from the lower end of the outer tube. The first filter cover has a settling groove corresponding to the inner tube. The inner tube extends at least partially into the settling groove. A first sealing ring is provided between the groove wall and the outer wall of the inner tube.

[0011] In one embodiment, the first filter cover has a second flow channel, which connects the settling tank and the water storage gap respectively, and the second flow channel is opened radially along the first filter cover.

[0012] In one embodiment, the first filter cover has a surface facing the reverse osmosis filter element, and the surface is provided with annular ribs so that the reverse osmosis filter element and the first filter cover enclose a flow cavity, the flow cavity being in communication with the interlayer channel.

[0013] In one embodiment, the water purification device further includes a second filter cover, which is connected to the upper end of the reverse osmosis filter element. The second filter cover has a first partition and a second partition protruding from it. The second partition is located outside the first partition. The first partition and the second partition sequentially separate an inlet chamber and a wastewater chamber from the outside to the inside. The inlet chamber is connected to the inlet side of the reverse osmosis filter element, and the wastewater outlet is connected to the interlayer flow channel through the wastewater chamber.

[0014] In one embodiment, the central tube further includes a stop plate, which is connected to the inner tube and the outer tube respectively to block the upper end of the interlayer flow channel, and the outer tube has a water passage hole communicating with the wastewater chamber.

[0015] In one embodiment, 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 cover enclose a flow-expanding cavity, which is connected to the central flow channel.

[0016] In one embodiment, the separator includes a separator plate, a first separator, and a second separator, the first separator and the second separator being connected to opposite sides of the separator plate, the reverse osmosis filter element being disposed inside the first separator, and the elastic element being disposed between the second separator and the cylinder.

[0017] In one embodiment, the elastic element has a flange, and the cylinder presses the flange of the elastic element against the bottom of the separator.

[0018] In one embodiment, the cylinder body is rotatably welded to the bottom of the second partition.

[0019] In one embodiment, the cylinder body includes a main body and a welding portion disposed on the outer periphery of the main body, and the second partition cylinder is provided with a weld groove adapted to the first welding portion, and the welding portion is rotatably welded to the weld groove.

[0020] In one embodiment, the filter bottle is provided with a second inlet and a second outlet. The second inlet is connected to the inlet side of the post-filter element, and the second outlet is connected to the outlet side of the post-filter element. A water passage is provided on the partition plate, and a water storage cavity is formed between the partition plate and the elastic member. The water passage is connected to the inside of the first partition cylinder and the water storage cavity, respectively.

[0021] In one embodiment, the elastic element is provided with a protrusion that abuts against the partition plate when the air bladder cavity volume returns to normal.

[0022] In one embodiment, the elastic element is provided with a plurality of pleats, which are used to compress the elastic element in the vertical direction when it is pressed.

[0023] The technical solution of the present invention employs a first filter component and a second filter component that can be refluxed, so that both the reverse osmosis filter element and the post-filter element have the function of water storage and reflux. Furthermore, the air bladder chamber in the second filter component is formed by an elastic element and a cylinder, which has a stronger water storage and reflux effect, thereby further reducing the TDS value of the first cup of water after the water purification equipment is turned on, thus improving the taste of the first cup of water. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the first filter component proposed in this invention;

[0026] Figure 2 for Figure 1 Exploded view;

[0027] Figure 3 This is a schematic diagram of the structure of the first filter component from a certain cross-sectional view.

[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0029] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0030] Figure 6 This is a schematic diagram showing the structural separation of the first filter element cover, the second filter element cover, the reverse osmosis filter element, and the central tube.

[0031] Figure 7 for Figure 6 Schematic diagram of the central tube;

[0032] Figure 8 This is a schematic diagram of the central tube from a certain cross-sectional view.

[0033] Figure 9 This is a structural schematic diagram of the central tube from another cross-sectional perspective;

[0034] Figure 10 This is a schematic diagram of the structure of the second filter component;

[0035] Figure 11 This is a schematic diagram of the second filter component from a cross-sectional view.

[0036] Figure 12 This is a schematic diagram of the separator structure;

[0037] Figure 13 This is a schematic diagram showing the structure where the elastic element and cylinder are separated.

[0038] Explanation of icon numbers:

[0039] 100. First filtration assembly; 1. First filter bottle; 11. Bottle body; 12. Top cover; 121. First water inlet; 122. First water outlet; 123. Wastewater outlet; 13. Bottom cover; 14. Annular protrusion; 15. Water storage gap; 2a. Reverse osmosis filter element; 21. Pure water side; 22. Wastewater side; 2b. Post-filter element; 2c. Pre-filter element; 3. Central tube; 3a. Central flow channel; 3b. Jacketed flow channel; 3c. First flow passage; 3d. Flow expansion chamber; 31. Outer tube; 3 11. Flow port; 312. Water passage hole; 313. Extension section; 313a. Second receiving groove; 32. Inner tube; 33. Connecting section; 34. Stop plate; 4. First filter element cover; 4a. Second flow channel; 4b. Flow cavity; 41. Settling tank; 411. First receiving groove; 42. Surface; 421. Annular rib; 43. First sealing ring; 5. Second filter element cover; 5a. Water inlet cavity; 5b. Wastewater cavity; 51. First partition; 52. Second partition; 53. Second sealing ring;

[0040] 200. Second filter assembly; 6. Second filter bottle; 61. Bottle body; 62. First end cap; 621. Second water inlet; 622. Second water outlet; 63. Second end cap; 6a. First chamber; 6b. Second chamber; 7. Separator; 71. Separator plate; 711. Water flow channel; 72. First partition cylinder; 73. Second partition cylinder; 731. Weld groove; 8. Elastic element; 81. Flanged edge; 82. Protrusion; 83. Pleated part; 8a. Air bladder chamber; 8b. Water storage chamber; 9. Cylinder body; 91. Main body; 92. Welded part; 93. Mounting groove.

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0044] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0045] As people increasingly prioritize quality of life, water quality has become a major concern. Water purifiers with reverse osmosis capabilities are gaining popularity due to the fresher, more hygienic, and safer purified water they produce. Raw water typically has a high total dissolved solids (TDS). Reverse osmosis filters, aided by a booster pump, block a large number of ions in the raw water before reaching the osmosis membrane, ensuring that the TDS of the water passing through the membrane meets drinking water standards. However, if the water purifier is shut down for an extended period and then restarted, the first glass of purified water will have a higher TDS, resulting in lower quality water that does not meet the user's needs.

[0046] In view of this, the present invention proposes a water purification device to filter raw water, ensuring that the water quality meets the user's needs and reducing the TDS value of the first cup of water, thus providing the user with a better taste for the first cup of water. This water purification device can be a water purifier, a water dispenser, a water softener / purifier combo machine, or a water purifier / heater combo machine, or any other product with water purification functionality.

[0047] The present invention proposes a water purification device including a first filtration component 100 and a second filtration component 200. The first filtration component 100 includes a first filter bottle 1, a reverse osmosis filter element 2a, and a central tube 3. The first filter bottle 1 has a first inlet 121 and a first outlet 122. The reverse osmosis filter element 2a is sleeved in the central tube 3 and disposed inside the first filter bottle 1. The outside of the reverse osmosis filter element 2a is wrapped with a sealing layer. The central tube 3 has a first flow channel 3c that connects to the pure water side 21 of the reverse osmosis filter element 2a. A water storage gap 15 is formed between the first filter bottle 1 and the reverse osmosis filter element 2a. The central tube 3 is connected to the water storage gap 15 and the first outlet 122 respectively.

[0048] The second filter assembly 200 is in water communication with the first filter assembly 100. The second filter assembly 200 includes a second filter bottle 6, a post-filter element 2b, a separator 7, an elastic element 8, and a cylinder 9. The separator 7 is disposed inside the second filter bottle 6, dividing the second filter bottle 6 into a first chamber 6a and a second chamber 6b arranged vertically. The first chamber 6a and the second chamber 6b are interconnected. The post-filter element 2b is disposed in the first chamber 6a, and the elastic element 8 is disposed in the second chamber 6b. The cylinder 9 is connected to the bottom of the separator 7. The elastic element 8 and the cylinder 9 enclose a compressible air bladder cavity 8a. One of the reverse osmosis filter element 2a and the post-filter element 2b is a post-filter element, and the other is a reverse osmosis filter element. The gas in the water storage gap 15 is reduced in volume due to water pressure, and the air bladder cavity 8a is also reduced in volume due to water pressure.

[0049] It should be noted that the positional relationship shown in the accompanying drawings and described in the following text is only the position of the first filter assembly 100 and the second filter assembly 200 in a certain state. The first filter assembly 100 is installed along the axial direction of the first filter bottle 1 on the water circuit board, and the second filter assembly 200 is installed along the axial direction of the second filter bottle 6 on the water circuit board. In other embodiments, the first filter assembly 100 and the second filter assembly 200 can also be installed vertically in the water circuit board. The first filter assembly 100 and the second filter assembly 200 are respectively integrated into the first filter bottle 1 and the second filter bottle 6. Of course, the first filter assembly 100 and the second filter assembly 200 can also be integrated into the same composite filter element. In the following description, only embodiments where the reverse osmosis filter element 2a is a reverse osmosis filter element and the post-filter element 2b is a post-filter element are shown. Of course, in this embodiment, the reverse osmosis filter element 2a can also be a post-filter element, and the post-filter element 2b can be a reverse osmosis filter element.

[0050] The first filter bottle 1 has a cavity for accommodating the reverse osmosis filter element 2a and other components of the first filter assembly 100, ensuring that the first filter assembly 100 is not disturbed by external factors. The first filter bottle 1 is connected to the outside only through the first inlet 121, the first outlet 122, and the first wastewater outlet 123. The first inlet 121 is for allowing raw water (tap water or water filtered by the pre-filter element 2c) to flow in. The wastewater outlet 123 is for discharging wastewater carrying a large amount of salt ions after being filtered by the reverse osmosis filter element 2a. The first outlet 122 is for discharging pure water (with a low salt ion concentration) after reverse osmosis filtration. In this embodiment, the first filter bottle 1 includes a hollow cylindrical bottle body 11, with a top cap 12 and a bottom cap 13 at both ends of the bottle body 11 to cover the openings at both ends of the bottle body 11. The top cover 12 and the bottle body 11 can be glued or welded, which is not specifically limited here. The bottom cover 13 and the bottle body 11 are fixed together by rotational welding, thereby enhancing the overall structural strength of the first filter bottle 1.

[0051] The first inlet 121, the first outlet 122, and the wastewater outlet 123 are equipped with regulating valves, which can adjust the opening degree of the first inlet 121, the first outlet 122, and the wastewater outlet 123. Alternatively, the regulating valves can be installed in external water circuits connected to the first inlet 121, the first outlet 122, and the wastewater outlet 123 to meet the actual operating requirements of the water purification equipment. The first filter bottle 1 proposed in this invention has two ends in its axial direction. The end of the first filter bottle 1 with the first inlet 121, the first outlet 122, and the wastewater outlet 123 is the upper end of the first filter bottle 1, and the opposite end is the lower end of the first filter bottle 1.

[0052] It should be noted that a booster pump is installed inside the water purification equipment to pressurize the water to be filtered entering the reverse osmosis filter element 2a. This increases the efficiency of the RO membrane in filtering pure water and improves the overall water purification efficiency of the equipment. When the user starts drawing water, the reverse osmosis filter element 2a is in filtration mode, and the booster pump continuously pressurizes the water. Therefore, the pure water filtered by the reverse osmosis filter element 2a flows through the central pipe 3, one path to the first outlet 122, and the other path into the water storage gap 15. The water in the water storage gap 15 compresses the air that was originally in the water storage gap 15. When the filtration mode of the reverse osmosis filter element 2a is turned off, the pressure of the booster pump disappears, and the pressure in the water storage gap 15 gradually returns to the same as the external air pressure. The compressed gas gradually recovers its volume, thereby squeezing the water that was originally in the water storage gap 15 back into the reverse osmosis filter element 2a. This discharges a portion of the wastewater in the reverse osmosis filter element 2a through the wastewater outlet 123, thereby reducing the overall TDS value of the first filter assembly 100.

[0053] It should be further explained that the pressure from the booster pump is carried into the second filter element along with the pure water flowing out of the first outlet 122. The water filtered by the post-filter element 2b also has two flow paths: one flows out from the outlet of the second filter bottle 6, and the other flows into the second chamber 6b through the partition plate 71. The pressurized water flow squeezes the elastic element 8 installed in the second chamber 6b, and the pressure on the elastic element 8 compresses the volume of the entire air chamber 8a. When the filtration mode of the water purification equipment is turned off, the pressure of the booster pump disappears, and the volume of the air chamber 8a gradually recovers, allowing the water flowing into the second chamber 6b to flow back into the post-filter element 2b through the partition plate 71. The water flowing into the post-filter element 2b then flows back into the first filter assembly 100 along the flow path of the water circuit plate, thereby discharging some of the wastewater in the reverse osmosis filter element 2a.

[0054] It should be noted that in this embodiment, by setting a cylinder 9 and an elastic element 8 to form an air bladder cavity 8a, compared with the previous technical solution where the elastic element 8 was placed inside the air bladder cavity 8a, the air bladder cavity 8a of this solution has a larger volume. During the compression and recovery process, more water can flow back into the reverse osmosis filter element 2a, thereby discharging more wastewater. This reduces the TDS value of the first cup of water (the first few cups of water) after the water purification equipment has been left to stand for a period of time and then restarted, thereby improving the taste of the first cup of water.

[0055] The technical solution of the present invention employs a first filter assembly 100 and a second filter assembly 200 with recirculation capability, enabling both the reverse osmosis filter cartridge and the post-filter cartridge to have water storage and recirculation functions. Furthermore, the air chamber 8a in the second filter assembly 200 is formed by the elastic element 8 and the cylinder 9, which has a stronger water storage and recirculation effect, thereby further reducing the TDS value of the first cup of water after the water purification equipment is turned on, thus improving the taste of the first cup of water.

[0056] Specifically, the reverse osmosis filter element 2a and the post-filter element 2b are arranged in a cylindrical shape, allowing water to easily pass through the axial space of the reverse osmosis filter element 2a. When the water flows radially through the reverse osmosis filter element 2a, it needs to pass through the membrane of the reverse osmosis filter element 2a, thereby filtering out salt ions in the water to the outside of the membrane. A central tube 3 is arranged inside the reverse osmosis filter element 2a. The central tube 3 provides support for the inner side of the reverse osmosis filter element 2a, preventing the reverse osmosis filter element 2a from being deformed by large water pressure, thus ensuring the smooth flow of water from the reverse osmosis filter element 2a. The reverse osmosis filter element 2a 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 2a. The pure water side 21 of the reverse osmosis filter element 2a is located inside the reverse osmosis filter element 2a. The wastewater side 22 is the position where the filtered wastewater containing high concentrations of salt ions flows out of the reverse osmosis filter element 2a. The wastewater side 22 of the reverse osmosis filter element 2a is located at the lower end of the reverse osmosis filter element 2a.

[0057] Further, please refer to Figure 3 , Figure 7 , Figure 8 as well as Figure 9 The central tube 3 has two mutually separated flow channels, 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, while the sandwich flow channel 3b is located outside the central flow channel 3a. The central tube 3 can be separated from the central flow channel 3a by a cylindrical body, or by other structures, which are not specifically limited here.

[0058] The central flow channel 3a is used to discharge the pure water filtered by the reverse osmosis filter element 2a, and the interlayer flow channel 3b is used to discharge the remaining wastewater (which contains a high concentration of salt ions) after filtration by the reverse osmosis filter element 2a. The pure water filtered by the reverse osmosis filter element 2a flows into the central flow channel 3a through the first flow channel 3c opened in the central pipe 3, while the wastewater directly enters the interlayer flow channel 3b from the flow port 311. The first filtration channel and the wastewater flow channel are separated from each other, thus separating the flow paths of pure water and wastewater. This allows the central pipe 3 to discharge both pure water and wastewater, thereby optimizing the water path of the first filter component 100. This ensures that the wastewater path of the reverse osmosis filter element 2a and the filtered pure water path do not interfere with each other, thus guaranteeing the output efficiency of the pure water after filtration by the reverse osmosis filter element 2a.

[0059] In addition, a flow port 311 is provided at the lower end of the central pipe 3, so that after the raw water enters the reverse osmosis filter element 2a, it flows axially through the wastewater side 22 of the reverse osmosis filter element 2a, and then flows into the interlayer flow channel 3b through the flow port 311, so as to carry out the salt ions in the reverse osmosis filter element 2a.

[0060] This first filter assembly 100 is used in a water purification device. In addition to reverse osmosis filtration, a pre-filter 2c is installed upstream of the first inlet 121. Water entering the first inlet 121 is filtered through the pre-filter 2c. During filtration, the pre-filter 2c adsorbs larger particles of impurities in the water, performing preliminary filtration. Then, the water passes through the membrane of the reverse osmosis filter 2a to remove most of the salt ions. Furthermore, a post-filter is installed downstream of the first outlet 122. Water filtered by the first filter assembly 100 is then filtered again by the post-filter to remove color and adjust taste before flowing out through the faucet.

[0061] In this embodiment, the first filter component 100 is integrated into the first filter bottle 1. Alternatively, the pre-filter 2c, the post-filter, and the reverse osmosis filter 2a can be integrated into the first filter bottle 1.

[0062] In one embodiment, please continue to refer to Figure 3 , Figure 7 , Figure 8 and Figure 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 through the connecting section 33. The central flow channel 3a is formed inside the inner tube 32. The interlayer flow channel 3b is formed between the inner tube 32 and the outer tube 31. The first flow passage 3c is formed inside the connecting section 33. The flow port 311 is opened in the outer tube 31.

[0063] It should be noted that an inner tube 32 and an outer tube 31 are provided, both of which are circular tubes. The inner tube 32 and the outer tube 31 are fitted onto the outside of the inner tube 32. The central flow channel 3a is located inside the inner tube 32, and the interlayer flow channel 3b is located between the outer tube 31 and the inner tube 32. That is, the central flow channel 3a and the interlayer flow channel 3b are separated by the inner tube 32, so that the central flow channel 3a and the interlayer flow channel 3b are not connected to each other. Furthermore, the connecting section 33 is located between the inner tube 32 and the outer tube 31, connecting the outside of the outer tube 31 and the inside of the inner tube 32 through the connecting section 33, that is, connecting the pure water side 21 of the reverse osmosis filter element 2a with the outlet flow channel. The connecting section 33 has an outer wall, which separates the first flow channel 3c inside the connecting section 33 from the interlayer flow channel 3b outside the connecting section 33. Considering that the flow port 311 is used to connect the wastewater side 22 of the reverse osmosis filter element 2a with the interlayer, and the interlayer flow channel 3b is located between the inner tube 32 and the outer tube 31, the flow port 311 is opened in the outer tube 31 so that the raw water flowing in from the upper end of the reverse osmosis filter element 2a flows axially through the entire reverse osmosis filter element 2a and carries out the high concentration of salt ions in the reverse osmosis filter element 2a.

[0064] In one embodiment, please refer to Figure 3 , Figure 4 and Figure 6 The first filter assembly 100 further includes a reverse osmosis filter element 2a cover, which is connected to the lower end of the reverse osmosis filter element 2a. The inner tube 32 protrudes from the lower end of the outer tube 31. The reverse osmosis filter element 2a cover has a settling groove 41 corresponding to the inner tube 32. The inner tube 32 extends at least partially into the settling groove 41. A first sealing ring 43 is provided between the groove wall of the settling groove 41 and the outer wall of the inner tube 32.

[0065] It should be noted that, considering that the reverse osmosis filter element 2a will be soaked by the incoming raw water during operation, and that the incoming raw water has a certain pressure, in order to prevent the reverse osmosis filter element 2a from deforming, a reverse osmosis filter element 2a cover is provided. The reverse osmosis filter element 2a cover is glued to the reverse osmosis filter element 2a, and the outer periphery of the reverse osmosis filter element 2a cover is glued to the outer periphery of the reverse osmosis filter element 2a, thereby maintaining the shape of the reverse osmosis filter element 2a in filtration mode.

[0066] Considering that the interlayer flow channel 3b and the central flow channel 3a within the central tube 3 will not interfere with each other, a settling tank 41 is provided on the cover of the reverse osmosis filter element 2a, and a first sealing ring 43 is provided between the tank wall of the settling tank 41 and the outer wall of the inner tube 32. Through the first sealing ring 43, the central flow channel 3a and the interlayer flow channel 3b at the lower end of the central tube 3 are kept separate, preventing wastewater from the interlayer flow channel 3b from contaminating the pure water in the central flow channel 3a. Furthermore, a first receiving groove 411 is provided on the tank wall of the settling tank 41. The first receiving groove 411 is used to receive the first sealing ring 43, with a portion of the first sealing ring 43 exposed in the first receiving groove 411, thereby forming an interference fit with the inner tube 32 to create a seal.

[0067] In one embodiment, please continue to refer to Figure 3 , Figure 4 and Figure 6 The reverse osmosis filter element 2a cover has a second flow channel 4a, which is connected to the settling tank 41 and the water storage gap 15 respectively. The second flow channel 4a is opened radially along the reverse osmosis filter element 2a cover.

[0068] It should be noted that, in order to allow the water in the settling tank 41 to flow into the water storage gap 15, a second flow channel 4a is provided on the cover of the reverse osmosis filter element 2a, so that the water in the settling tank 41 can flow into the water storage gap 15 through the second flow channel 4a. It should also be noted that, during use, the opening of the second flow channel 4a facing the water storage gap 15 is downward, so that the gas in the water storage gap 15 is ultimately squeezed to the upper side of the second flow channel 4a, preventing the gas in the water storage gap 15 from overflowing.

[0069] In one embodiment, please continue to refer to Figure 3 , Figure 4 and Figure 6 The reverse osmosis filter element 2a cover has a surface 42 facing the reverse osmosis filter element 2a. The surface 42 is provided with annular ribs 421 so that the reverse osmosis filter element 2a and the reverse osmosis filter element 2a cover enclose and form a flow cavity 4b, which is connected to the flow port 311.

[0070] Specifically, on the side of the reverse osmosis filter element 2a closest to the cover of the reverse osmosis filter element 2a, i.e. the outlet side of the reverse osmosis filter element 2a, in order to enable the outlet water of the reverse osmosis filter element 2a to flow into the flow port 311 efficiently, an annular rib 421 is provided on the surface 42 of the cover of the reverse osmosis filter element 2a. This annular rib 421 abuts against the reverse osmosis filter element 2a, thereby forming a flow cavity 4b between the annular rib 421, the surface 42 of the cover of the reverse osmosis filter element 2a, and the reverse osmosis filter element 2a.

[0071] In one embodiment, please refer to Figure 3 , Figure 5 and Figure 6 The first filter assembly 100 further includes a post-filter element 2b cover, which is connected to the upper end of the reverse osmosis filter element 2a. The post-filter element 2b cover has a first partition 51 and a second partition 52 protruding from it. The second partition 52 is located outside the first partition 51. The first partition 51 and the second partition 52 sequentially separate an inlet chamber 5a and a wastewater chamber 5b from the outside to the inside. The inlet chamber 5a is connected to the inlet side of the reverse osmosis filter element 2a, and the wastewater outlet 123 is connected to the interlayer flow channel 3b through the wastewater chamber 5b.

[0072] More specifically, the reverse osmosis filter cartridge 2a cover is located at the lower end of the first filter assembly 100, and correspondingly, the post-filter cartridge 2b cover is located at the upper end of the first filter assembly 100. The post-filter cartridge 2b cover is also bonded to the reverse osmosis filter cartridge 2a, and the post-filter cartridge 2b cover has an outer peripheral extension, which is also bonded to the outer periphery of the reverse osmosis filter cartridge 2a, thereby maintaining the state of the reverse osmosis filter cartridge 2a in filtration mode. Among them, the post-filter cartridge 2b cover has a first partition 51 and a second partition 52 protruding in the direction away from the reverse osmosis filter cartridge 2a. The first partition 51 and the second partition 52 divide the reverse osmosis filter cartridge 2a into two chambers from the inside to the outside, namely the inlet chamber 5a and the wastewater chamber 5b. The inlet chamber 5a is used to introduce the raw water flowing in from the first inlet 121 to the inlet side of the reverse osmosis filter cartridge 2a, and the wastewater chamber 5b is used to introduce the wastewater in the wastewater channel into the wastewater outlet 123, thereby further improving the flow path inside the reverse osmosis filter cartridge 2a.

[0073] In one embodiment, please refer to Figure 5 The central tube 3 also includes a stop plate 34, which is connected to the inner tube 32 and the outer tube 31 respectively to block the upper end of the interlayer flow channel 3b. The outer tube 31 has a water passage hole 312 that communicates with the wastewater chamber 5b.

[0074] 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 pipe 3, the central pipe 3 is also equipped with a stop plate 34. The stop plate 34 is connected to the inner pipe 32 and the outer pipe 31 respectively, thereby blocking the upper end of the interlayer flow channel 3b and preventing the wastewater in the interlayer flow channel 3b from contaminating the central flow channel 3a. By opening a water passage 312 in the outer pipe 31 that communicates with the wastewater chamber 5b, the wastewater in the interlayer flow channel 3b is discharged into the wastewater chamber 5b through the water outlet, and finally flows out of the first filter bottle 1 from the wastewater outlet 123.

[0075] In one embodiment, please continue to refer to Figure 5The outer tube 31 extends upward from the stop plate 34 to form an extension section 313. The extension section 313, the stop plate 34, and the rear filter element 2b cover enclose and form a flow-expanding cavity 3d, which is connected to the central flow channel 3a.

[0076] It should be noted that the extension section 313 is aligned with the axis of the outer tube 31, and the inner diameter of the extension section 313 is aligned with that of the outer tube 31. Therefore, the inner diameter of the extension section 313 is larger than the inner diameter of the inner tube 32. Thus, the flow-expanding cavity 3d enclosed by the extension section 313, the stop plate 34, and the rear filter element 2b cover 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 have a larger flow rate to flow into the next filter element for filtration or flow into the faucet.

[0077] In one embodiment, please continue to refer to Figure 5 The first filter bottle 1 is provided with an annular protrusion 82 14 facing downwards, the extension section 313 is inserted into the annular protrusion 82 14, and a second sealing ring 53 is provided between the extension section 313 and the annular protrusion 82 14.

[0078] Specifically, the first filter bottle 1 is provided with an annular protrusion 82 14 adapted to the extension section 313, allowing the extension section 313 to be inserted into the annular protrusion 82 14. A second sealing ring 53 is provided between the extension section 313 and the annular protrusion 82 14 to form a sealed fit, preventing the pure water in the expansion chamber 3d from exchanging with the wastewater in the wastewater chamber 5b of the first filter bottle 1. More specifically, a second receiving groove 313a is formed on the outer wall of the extension section 313, allowing the second sealing ring 53 to be partially received in the second receiving groove 313a, with the other part of the second sealing ring 53 exposed at the opening of the second receiving groove 313a, forming an interference fit seal with the annular protrusion 82 14. In other embodiments, the annular protrusion 82 14 may also be inserted into the extension section 313, forming a sealed fit between the outer wall of the annular protrusion 82 14 and the inner wall of the extension section 313.

[0079] In one embodiment, please refer to Figure 11 and Figure 12 The separator 7 includes a separator plate 71, a first separator 72 and a second separator 73. The first separator 72 and the second separator 73 are respectively connected to opposite sides of the separator plate 71. The reverse osmosis filter element 2a is disposed inside the first separator 72. The elastic element 8 is disposed between the second separator 73 and the cylinder 9.

[0080] It should be noted that the separator 7 has multiple components, each with its own function. The separator 71 primarily divides the filter bottle into a filtration area above the separator 71 and a water storage and return area below the separator 71. Further, the filtration area, together with the first partition cylinder 72 and the top of the filter bottle, forms a first chamber 6a. This first chamber 6a is used for filtration by the post-filter cartridge 2b. The outer side of the first partition cylinder 72 is the filtration area for the pre-filter cartridge 2c. The pre-filter cartridge 2c filtration area and the post-filter cartridge 2b filtration area are not connected within the filter bottle and do not interfere with each other. Considering that the lifespan of the post-filter cartridge 2b and the pre-filter cartridge 2c is basically the same, the pre-filter cartridge 2c and the post-filter cartridge 2b are placed in the same second filter bottle 6 for easy replacement and installation.

[0081] In one embodiment, please refer to Figure 11 and Figure 12 The elastic element 8 has a flange 81, and the cylinder 9 presses the flange 81 of the elastic element 8 to the bottom of the separator 7.

[0082] Specifically, in this embodiment, the cylinder 9 fixes the separator 7 by pressing the flange 81 of the elastic member to the bottom of the separator 7. A mounting groove 93 is formed between the main body 91 and the welding part 92 of the cylinder 9, and the flange 81 of the elastic member 8 is placed in the mounting groove 93.

[0083] In one embodiment, please refer to Figure 11 and Figure 13 The cylinder body 9 is rotatably welded to the bottom of the second partition cylinder 73.

[0084] Specifically, the cylinder body 9 is rotatably welded to the bottom of the second partition cylinder 73, that is, one of the cylinder body 9 or the second partition cylinder 73 rotates relative to the other. The heat generated by high-speed friction causes the cylinder body 9 and / or the second partition cylinder 73 to be thermally welded together, thereby ensuring the fixed strength of the two and being able to withstand large water pressure and maintain a stable fixed relationship.

[0085] In one embodiment, please refer to Figure 1 The cylinder body 9 includes a main body 91 and a welding part 92 disposed on the outer periphery of the main body 91. The second partition cylinder 73 is provided with a weld groove 731 adapted to the first welding part 92, and the welding part 92 is rotatably welded to the weld groove 731.

[0086] It should be noted that the main body 91 of the cylinder body 9 is barrel-shaped, and a welding part 92 is provided on the outer side of the main body 91. The welding part 92 can rotate relative to the weld groove 731 so that either the welding part 92 or the groove wall of the weld groove 731 can be heat-fused, thereby fixing the cylinder body 9 and the second partition cylinder 73 together, giving it good fixing strength.

[0087] In one embodiment, please refer to Figure 10 The first filter bottle 1 is provided with a second water inlet 621 and a second water outlet 622. The second water inlet 621 is connected to the water inlet side of the post-filter element 2b, and the second water outlet 622 is connected to the water outlet side of the post-filter element 2b. The partition plate 71 is provided with a water flow channel 711. A water storage cavity 8b is formed between the partition plate 71 and the elastic member 8. The water flow channel 711 is connected to the inside of the first partition cylinder 72 and the water storage cavity 8b respectively.

[0088] In one embodiment, please refer to Figure 11 and Figure 13 The elastic element 8 is provided with a protrusion 82. When the volume of the air bladder cavity 8a returns to normal, the protrusion 82 abuts against the partition plate 71.

[0089] It should be noted that, in order to make the airbag cavity 8a have a larger compressible volume, so that more water can be squeezed back to the first filter component 100 during the water storage and return process, in this embodiment, when the airbag cavity 8a is not compressed, the protrusion 82 at the top of the airbag cavity 8a abuts against the partition plate 71, thereby ensuring that the airbag cavity 8a has a sufficiently large volume.

[0090] In one embodiment, please continue to refer to Figure 11 and Figure 13 The elastic element 8 is provided with a plurality of pleats 83, which ensures that when the elastic element 8 is subjected to pressure, it can be compressed in a specified direction, namely the up and down direction in this embodiment, and thus can be compressed regularly, avoiding uneven pressure on the elastic element 8, which would lead to serious pressure loss.

[0091] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A water purification device, characterized in that, include: The first filtration assembly includes a first filter bottle, a reverse osmosis filter element, and a central tube. The first filter bottle has a first inlet and a first outlet. The reverse osmosis filter element is fitted onto the central tube and disposed inside the first filter bottle. The outer side of the reverse osmosis filter element is covered with a sealing layer. The central tube has a first flow channel communicating with the pure water side of the reverse osmosis filter element. A water storage gap is formed between the first filter bottle and the reverse osmosis filter element. The central tube is connected to the water storage gap and the first outlet. When the reverse osmosis filter element is in filtration mode, the pure water filtered by the reverse osmosis filter element flows through the central tube, one path to the first outlet and the other path into the water storage gap. The second filter assembly is connected to the water path of the first filter assembly. The second filter assembly includes a second filter bottle, a post-filter element, a separator, an elastic element, and a cylinder. The separator is disposed inside the second filter bottle and divides the second filter bottle into a first chamber and a second chamber arranged vertically. The first chamber and the second chamber are connected to each other. The post-filter element is disposed in the first chamber. The elastic element is disposed in the second chamber. The cylinder is connected to the bottom of the separator. The elastic element and the cylinder form a compressible air bladder cavity. When the water pump of the water purification equipment pressurizes, the gas in the water storage gap shrinks due to water pressure, and the air bladder cavity shrinks due to water pressure. When the water pump of the water purification equipment stops, the gas in the water storage gap returns to its original volume, and the air bladder cavity returns to its original volume. The elastic element is provided with a number of pleats, which are used to compress the elastic element in the vertical direction when it is pressed. The separator includes a separator plate, a first separator cylinder, and a second separator cylinder. The first separator cylinder and the second separator cylinder are respectively connected to opposite sides of the separator plate. The post-filter element is disposed inside the first separator cylinder. The elastic element is disposed between the second separator cylinder and the cylinder body. The elastic element is provided with a protrusion. When the volume of the air chamber returns to normal, the protrusion abuts against the separator plate.

2. The water purification equipment as described in claim 1, characterized in that, The central tube is provided with a central flow channel and a sandwich flow channel that are separated from each other. The first filter bottle is also provided with a wastewater outlet. The central flow channel is connected to the first flow channel and the first outlet respectively. The sandwich flow channel is connected to the wastewater outlet and the wastewater side of the reverse osmosis filter element respectively.

3. The water purification equipment as described in claim 2, 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 passage is formed within the connecting section.

4. The water purification equipment as described in claim 3, characterized in that, The water purification equipment also includes a reverse osmosis filter cover, which is connected to the lower end of the reverse osmosis filter. The inner tube protrudes from the lower end of the outer tube. The reverse osmosis filter cover has a settling groove corresponding to the inner tube. The inner tube extends at least partially into the settling groove. A first sealing ring is provided between the groove wall and the outer wall of the inner tube.

5. The water purification equipment as described in claim 4, characterized in that, The reverse osmosis filter cartridge cover has a second flow channel, which connects the settling tank and the water storage gap respectively, and the second flow channel is opened radially along the reverse osmosis filter cartridge cover.

6. The water purification equipment as described in claim 3, characterized in that, The reverse osmosis filter cartridge cover has a surface facing the reverse osmosis filter cartridge, and the surface is provided with annular ribs so that the reverse osmosis filter cartridge and the reverse osmosis filter cartridge cover enclose and form a flow cavity, which is connected to the interlayer flow channel.

7. The water purification equipment as described in claim 4, characterized in that, The water purification device also includes a post-filter cover, which is connected to the upper end of the post-filter. The post-filter cover has a first partition and a second partition protruding from it. The second partition is located outside the first partition. The first partition and the second partition sequentially separate 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 post-filter, and the wastewater outlet is connected to the interlayer flow channel through the wastewater chamber.

8. The water purification equipment as described in claim 7, characterized in that, The central tube also includes a stop plate, which is connected to the inner tube and the outer tube respectively to block the upper end of the interlayer flow channel. The outer tube has a water passage hole that communicates with the wastewater chamber.

9. The water purification equipment as described in claim 8, characterized in that, The outer tube extends upward from the stop plate to form an extension section. The extension section, the stop plate, and the rear filter cover enclose a flow-expanding cavity, which is connected to the central flow channel.

10. The water purification equipment as described in claim 1, characterized in that, The elastic element has a flange, and the cylinder presses the flange of the elastic element against the bottom of the separator.

11. The water purification equipment as described in claim 10, characterized in that, The cylinder body is rotatably welded to the bottom of the second partition cylinder.

12. The water purification equipment as described in claim 11, characterized in that, The cylinder body includes a main body and a welding part disposed on the outer periphery of the main body. The second partition cylinder is provided with a welding groove adapted to the welding part, and the welding part is rotatably welded to the welding groove.

13. The water purification equipment as described in claim 1, characterized in that, The filter bottle is provided with a second inlet and a second outlet. The second inlet is connected to the inlet side of the post-filter element, and the second outlet is connected to the outlet side of the post-filter element. A water flow channel is provided on the partition plate, and a water storage cavity is formed between the partition plate and the elastic element. The water flow channel is connected to the inside of the first partition cylinder and the water storage cavity respectively.

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