Water purification equipment

Abstract

The utility model discloses water purification equipment which comprises a first filter assembly and a second filter assembly, and the first filter assembly comprises a first filter bottle, a first filter element and a central pipe; the second filter assembly is communicated with the water path of the first filter assembly and comprises a second filter bottle, a second filter element, a separator, an elastic piece and a cylinder body; one of the first filter element and the second filter element is a rear filter element, and the other one of the first filter element and the second filter element is a reverse osmosis filter element. According to the technical scheme, the first filter assembly and the second filter assembly capable of achieving backflow are adopted, the reverse osmosis filter element and the rear filter element both have the water storage backflow function, the air bag cavity in the second filter assembly is defined by the elastic piece and the cylinder body, the stronger water storage backflow effect is achieved, and the water storage backflow effect is better. Therefore, 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] The utility model relates to the technical field of water purification, in particular to a water purification device. Background Art

[0002] As the public pursues a higher quality of life, water quality has become a growing concern. Reverse osmosis water purification equipment is becoming increasingly popular, as it produces fresher, more hygienic, and safer purified water. In existing water purification equipment, the post-filter allows a portion of the filtered water to flow back to the primary filter, maintaining a low TDS value even after a period of downtime. However, the return flow effect of existing post-filters is poor, allowing only a small amount of water to flow back to the primary filter. As a result, the TDS value of the first glass of water after the water purification equipment is turned on is still relatively high. Utility Model Content

[0003] The main purpose of the utility model is to provide a water purification device, aiming to further improve the taste of the first cup of water after the water purification device is turned on.

[0004] To achieve the above-mentioned purpose, the water purification equipment proposed in this utility model includes:

[0005] A first filter assembly includes a first filter bottle, a first filter element, and a center tube, wherein the first filter bottle is provided with a first water inlet and a first water outlet, the first filter element is sleeved on the center tube and disposed within the first filter bottle, the outer side of the first filter element is wrapped with a sealing layer, the center tube is provided with a first flow channel connected to the pure water side of the first filter element, a water storage gap is formed between the first filter bottle and the first filter element, and the water storage gap and the first water outlet are respectively connected within the center tube;

[0006] a second filter assembly, connected to the first filter assembly by water, comprising a second filter bottle, a second filter element, a separator, an elastic member, and a cylinder; the separator being disposed in the second filter bottle, the separator dividing the second filter bottle into a first chamber and a second chamber disposed vertically, the first chamber and the second chamber being connected to each other; the second filter element being disposed in the first chamber; the elastic member being disposed in the second chamber; and the cylinder being connected to the bottom of the separator; the elastic member and the cylinder forming a compressible airbag cavity.

[0007] Among them, one of the first filter element and the second filter element is a post-filter element, and the other is a reverse osmosis filter element. The gas in the water storage gap shrinks and becomes smaller in volume due to water pressure, and the airbag cavity shrinks and becomes smaller in volume due to water pressure.

[0008] In one embodiment, the first filter element is configured as a first filter element, and a central flow channel and an interlayer flow channel separated from each other are provided in the central tube. A wastewater outlet is also provided on the first filter bottle, and the central flow channel is respectively connected to the first flow channel and the first water outlet, and the interlayer flow channel is respectively connected to the wastewater outlet and the wastewater side of the first filter element.

[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 channel is formed in the connecting section, and the flow port is opened in the outer tube.

[0010] In one embodiment, the water purification equipment also includes a first filter element cover, which is connected to the lower end of the first filter element, and the inner tube is exposed at the lower end of the outer tube. The first filter element cover is provided with a sink corresponding to the inner tube, and the inner tube at least partially extends into the sink, and a first sealing ring is provided between the groove wall of the sink and the outer wall of the inner tube.

[0011] In one embodiment, the first filter element cover is provided with a second flow passage, the second flow passage is connected to the sink and the water storage gap respectively, and the second flow passage is provided along the radial direction of the first filter element cover.

[0012] In one embodiment, the first filter element cover has a surface facing the first filter element, and the surface is protrudingly provided with an annular rib so that the first filter element and the first filter element cover are enclosed to form a flow cavity, and the flow cavity is connected to the interlayer flow channel.

[0013] In one embodiment, the water purification equipment also includes a second filter element cover, which is connected to the upper end of the first filter element. The second filter element cover is protrudingly provided with a first partition and a second partition, and the second partition is located on the outside of the first partition. The first partition and the second partition separate the water inlet chamber and the wastewater chamber from the outside to the inside in sequence, and the water inlet chamber is connected to the water inlet side of the first filter element, and the wastewater port is connected to the interlayer flow channel through the wastewater chamber.

[0014] In one embodiment, the central tube further comprises a stop plate, which is respectively connected to the inner tube and the outer tube to block the upper end of the sandwich flow channel, and the outer tube is provided with a water hole communicating with the wastewater cavity.

[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 element cover together form a flow expansion cavity, and the flow expansion cavity is connected to the central flow channel.

[0016] In one embodiment, the first filter bottle is provided with an annular protrusion facing downward, the extension section is inserted into the annular protrusion, and a second sealing ring is provided between the extension section and the annular protrusion.

[0017] In one embodiment, the partition includes a partition plate, a first partition cylinder and a second partition cylinder, the first partition cylinder and the second partition cylinder are respectively connected to opposite sides of the partition plate, the first filter element is arranged in the first partition cylinder, and the elastic member is arranged between the second partition cylinder and the cylinder body.

[0018] In one embodiment, the elastic member has a flange, and the cylinder presses the flange of the elastic member to the bottom of the partition.

[0019] In one embodiment, the cylinder is rotationally welded to the bottom of the second partition.

[0020] In one embodiment, the cylinder body includes a main body and a welding portion provided on the outer periphery of the main body, the second spacer is provided with a welding groove adapted to the first welding portion, and the welding portion is rotationally welded to the welding groove.

[0021] In one embodiment, the filter bottle is provided with a second water inlet and a second water outlet, the second water inlet is connected to the water inlet side of the second filter element, the second water outlet is connected to the water outlet side of the second filter element, a water flow channel is provided on the partition plate, and a water storage chamber is formed between the partition plate and the elastic member, and the water flow channel is respectively connected to the interior of the first partition cylinder and the water storage chamber.

[0022] In one embodiment, a protrusion is provided on the elastic member, and when the volume of the airbag cavity is restored, the protrusion contacts the partition plate.

[0023] In one embodiment, the elastic member is provided with a plurality of folds, so as to compress the elastic member in the up and down directions when the elastic member is under pressure.

[0024] The technical solution of the present invention adopts a first filter component and a second filter component that are provided with reflux, so that both the reverse osmosis filter element and the post-filter element have the function of storing and refluxing water, and the air bag cavity in the second filter component is formed by the elastic member and the cylinder body, 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, thereby improving the taste of the first cup of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of the first filter assembly proposed in the present invention;

[0027] Figure 2 for Figure 1 Exploded diagram;

[0028] Figure 3 is a schematic structural diagram of the first filter assembly at a certain cross-sectional perspective;

[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0031] Figure 6 Schematic diagram of the separation structure of the first filter element cover, the second filter element cover, the first filter element and the central tube;

[0032] Figure 7 for Figure 6 Schematic diagram of the structure of the central tube;

[0033] Figure 8 Schematic diagram of the structure of the central tube at a certain cross-sectional perspective;

[0034] Figure 9 Schematic diagram of the structure of the central tube from another cross-sectional perspective;

[0035] Figure 10 is a structural schematic diagram of the second filter assembly;

[0036] Figure 11 is a schematic structural diagram of the second filter assembly from a cross-sectional perspective;

[0037] Figure 12 Schematic diagram of the structure of the separator;

[0038] Figure 13 Schematic diagram of the structure in which the elastic part and the cylinder body are separated.

[0039] Description of Figure Numbers:

[0040] 100. First Filter 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 Raised Portion; 15. Water Storage Gap; 2a. First Filter Element; 21. Pure Water Side; 22. Wastewater Side; 2b. Second Filter Element; 2c. Pre-Filter Element; 3. Center Tube; 3a. Center Flow Channel; 3b. Interlayer Flow Channel; 3c. First Flow Channel; 3d. Diffuser Chamber; 31. Outer Tube; 31. 1. Flow port; 312. Water hole; 313. Extension section; 313a. Second accommodating groove; 32. Inner tube; 33. Connecting section; 34. Stop plate; 4. First filter element cover; 4a. Second flow passage; 4b. Flow chamber; 41. Sinking groove; 411. First accommodating groove; 42. Surface; 421. Annular rib; 43. First sealing ring; 5. Second filter element cover; 5a. Water inlet chamber; 5b. Wastewater chamber; 51. First partition; 52. Second partition; 53. Second sealing ring.

[0041] 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, partition; 71, partition plate; 711, water flow channel; 72, first partition; 73, second partition; 731, welding groove; 8, elastic member; 81, flange; 82, protrusion; 83, pleated portion; 8a, airbag cavity; 8b, water storage cavity; 9, cylinder body; 91, main body; 92, welding portion; 93, mounting groove.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] It should be noted that if directional indications are involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] As the public pursues a higher quality of life, water quality has become a growing concern. Reverse osmosis water purification equipment is becoming increasingly popular because it produces fresher, more hygienic, and safer purified water. Raw water typically has a high TDS. The first filter element, powered by a booster pump, blocks a large number of ions in the raw water before the membrane, ensuring that the TDS of the water passing through the membrane meets drinking water standards. However, when the water purification equipment is shut down for an extended period and then restarted, the TDS of the first glass of purified water is often high, resulting in a low quality that fails to meet user expectations.

[0047] In view of this, the present invention proposes a water purification device that filters raw water passing through it, ensuring that the water quality meets the user's needs and reducing the TDS value of the first glass of water, allowing users to experience a better first glass of water. The water purification device can be a product with water purification function, such as a water purifier, a water purifier, a water purifier, and a water purifier.

[0048] The utility model proposes a water purification device including a first filter assembly 100 and a second filter assembly 200. The first filter assembly 100 includes a first filter bottle 1, a first filter element 2a and a central tube 3. The first filter bottle 1 is provided with a first water inlet 121 and a first water outlet 122. The first filter element 2a is sleeved in the central tube 3 and disposed within the first filter bottle 1. The outer side of the first filter element 2a is wrapped with a sealing layer. The central tube 3 is provided with a first flow channel 3c connected to the pure water side 21 of the first filter element 2a. A water storage gap 15 is formed between the first filter bottle 1 and the first filter element 2a. The water storage gap 15 and the first water outlet 122 are respectively connected within the central tube 3.

[0049] The second filter assembly 200 is connected to the first filter assembly 100 by water. The second filter assembly 200 includes a second filter bottle 6, a second filter element 2b, a partition 7, an elastic member 8 and a cylinder body 9. The partition 7 is arranged in the second filter bottle 6. The partition 7 divides the second filter bottle 6 into a first chamber 6a and a second chamber 6b arranged upper and lower. The first chamber 6a and the second chamber 6b are connected to each other. The second filter element 2b is arranged in the first chamber 6a. The elastic member 8 is arranged in the second chamber 6b. The cylinder body 9 is connected to the bottom of the partition 7. The elastic member 8 and the cylinder body 9 enclose a compressible air bag cavity 8a; wherein, one of the first filter element 2a and the second 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 shrinks in volume due to water pressure, and the air bag cavity 8a shrinks in volume due to water pressure.

[0050] It should be noted that the positional relationships illustrated in the accompanying drawings and described in the following specification only represent the positions of the first filter assembly 100 and the second filter assembly 200 in a specific state. In the present invention, the first filter assembly 100 is mounted axially on the waterway plate relative to the first filter bottle 1, while the second filter assembly 200 is mounted axially on the waterway plate relative to the second filter bottle 6. In other embodiments, the first and second filter assemblies 100, 200 may be mounted vertically within the waterway plate. The first and second filter assemblies 100, 200 are integrated within the first and second filter bottles 1, 6, respectively. Alternatively, the first and second filter assemblies 100, 200 may be integrated within the same composite filter element. In the following description, only an embodiment in which the first filter element 2a is a reverse osmosis filter element and the second filter element 2b is a post-filter element is shown. However, in this embodiment, the first filter element 2a may also be a post-filter element, while the second filter element 2b may be a reverse osmosis filter element.

[0051] The first filter bottle 1 has a housing cavity formed therein for accommodating the first filter element 2a and other components of the first filter assembly 100, ensuring that the first filter assembly 100 is not disturbed by external interference. The first filter bottle 1 is connected to the outside world only through a first water inlet 121, a first water outlet 122, and a first wastewater outlet 123. The first water inlet 121 is an inlet for admitting raw water (tap water or water filtered by the pre-filter element 2c). The wastewater outlet 123 is used to discharge wastewater carrying a large amount of salt ions after being filtered by the first filter element 2a. The first water outlet 122 is used to discharge pure water (with a low salt ion concentration) after reverse osmosis filtration. In this embodiment, the first filter bottle 1 includes a hollow cylindrical body 11, with a top cover 12 and a bottom cover 13 provided at each end of the body 11 to shield the openings at each end of the 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.

[0052] Among them, the first water inlet 121, the first water outlet 122 and the wastewater outlet 123 are provided with regulating valves, and the openings of the first water inlet 121, the first water outlet 122 and the wastewater outlet 123 can be adjusted by the regulating valves. Of course, the regulating valves can also be respectively provided in the external water channels connected to the first water inlet 121, the first water outlet 122 and the wastewater outlet 123 to meet the actual operation requirements of the water purification equipment. The first filter bottle 1 proposed in the present invention has two ends in its axial direction. The end of the first filter bottle 1 provided with the first water inlet 121, the first water outlet 122 and the wastewater outlet 123 is the upper end of the first filter bottle 1, and the other end opposite to the first filter bottle 1 is the lower end of the first filter bottle 1.

[0053] It should be noted that a booster pump is provided within the water purification device to pressurize the water to be filtered entering the first filter element 2a. This increases the efficiency of the RO membrane filtration of the purified water and improves the water purification efficiency of the entire water purification device. When the user begins to receive water, the first filter element 2a is in filtration mode, and the booster pump continuously increases the pressure. Therefore, the purified water filtered by the first filter element 2a flows through the central tube 3, one way to the first water outlet 122, and the other way into the water storage gap 15. The water in the water storage gap 15 squeezes the air originally occupying the water storage gap 15, compressing the volume of the air. When the filtration mode of the first 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 level as the external air pressure. The compressed air gradually recovers its volume, squeezing the water originally in the water storage gap 15 back into the first filter element 2a, thereby discharging a portion of the wastewater in the first filter element 2a through the wastewater outlet 123, thereby reducing the overall TDS value within the first filter assembly 100.

[0054] It should be further explained that the pressure generated by the booster pump is carried into the second filter element along with the pure water flowing out of the first water outlet 122. The water filtered by the second filter element 2b also has two flow paths: one will flow out from the water outlet of the second filter bottle 6, and the other will flow into the second chamber 6b through the partition plate 71. As a result, the inflowing pressurized water will squeeze the elastic member 8 disposed in the second chamber 6b, and the elastic member 8 will be subjected to pressure, thereby compressing the volume of the entire airbag cavity 8a. When the filtration mode of the water purification device is turned off, the pressure of the booster pump disappears, and the volume of the airbag cavity 8a gradually recovers, causing the water flowing into the second chamber 6b to flow into the second filter element 2b again through the partition plate 71. The water flowing into the second filter element 2b will flow back into the first filter assembly 100 along the flow path of the waterway plate, thereby discharging some of the wastewater in the first filter element 2a.

[0055] It should be noted that, in this embodiment, a cylinder body 9 and an elastic member 8 are provided to enclose an airbag cavity 8a. Compared with the previous technical solution in which the elastic member 8 is provided in the airbag cavity 8a, the airbag cavity 8a of this solution has a larger volume. During the compression and recovery process, more water can flow back into the first filter element 2a, thereby discharging more waste water, thereby reducing the TDS value of the first cup of water (the first few cups of water) after the water purification equipment has been left standing for a period of time and then reopened, thereby improving the taste of the first cup of water.

[0056] The technical solution of the present invention adopts a first filter component 100 and a second filter component 200 that are provided with reflux, so that both the reverse osmosis filter element and the post-filter element have the function of storing and refluxing water, and the air bag cavity 8a in the second filter component 200 is formed by the elastic member 8 and the cylinder body 9, 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, thereby improving the taste of the first cup of water.

[0057] Specifically, the first filter element 2a and the second filter element 2b are cylindrically arranged, allowing water to easily flow through the axial space of the first filter element 2a. When water flows radially through the first filter element 2a, it passes through the membrane of the first filter element 2a, thereby filtering salt ions from the water outside the membrane. A central tube 3 is provided inside the first filter element 2a. This central tube 3 supports the inner side of the first filter element 2a, preventing structural deformation due to high water pressure, thereby ensuring a smooth water outlet from the first filter element 2a. The first filter element 2a has a pure water side 21 and a wastewater side 22. The pure water side 21 is located inside the first filter element 2a, where the filtered pure water flows out of the first filter element 2a. The wastewater side 22 is located at the lower end of the first filter element 2a, where the filtered wastewater containing a high concentration of salt ions flows out of the first filter element 2a.

[0058] Further, see Figure 3 、 Figure 7 、 Figure 8 as well as Figure 9 The central tube 3 has two separated flow channels, namely a central flow channel 3a and an interlayer flow channel 3b. The central flow channel 3a is located at the center of the central tube 3, while the interlayer flow channel 3b is located outside the central flow channel 3a. The central tube 3 can be separated from the interlayer flow channel 3b by a cylindrical body or other structures, which are not specifically limited here.

[0059] Among them, the central flow channel 3a is used to discharge the pure water filtered by the first filter element 2a, and the interlayer flow channel 3b is used to discharge the wastewater remaining after the filtration of the first filter element 2a (the wastewater contains a higher concentration of salt ions). The pure water filtered from the first filter element 2a flows into the central flow channel 3a through the first flow channel 3c opened in the central tube 3, and the wastewater directly enters the interlayer flow channel 3b from the flow port 311, and the first filter channel and the wastewater flow channel are separated from each other, so that the flow path of pure water and the flow path of wastewater are separated, so that the central tube 3 can discharge both pure water and wastewater, thereby optimizing the water path of the first filter component 100, so that the wastewater water path of the first filter element 2a and the water path of the filtered pure water do not interfere with each other, thereby ensuring the water outlet efficiency of the pure water filtered by the first filter element 2a.

[0060] In addition, a flow port 311 is provided at the lower end of the central tube 3, so that after the raw water enters the first filter element 2a, it flows axially through the wastewater side 22 of the first filter element 2a, and then flows into the interlayer flow channel 3b from the flow port 311 to carry out the salt ions in the first filter element 2a.

[0061] This first filter assembly 100 is used in a water purification device. In addition to reverse osmosis filtration, a pre-filter element 2c is also installed upstream of the first water inlet 121. Water entering the first water inlet 121 is filtered by the pre-filter element 2c. During filtration, the pre-filter element 2c absorbs larger particles of impurities in the water, initially filtering the raw water. The membrane of the first filter element 2a then filters out most of the salt ions in the water. Furthermore, a post-filter element is installed downstream of the first water outlet 122. After being filtered by the first filter assembly 100, the water is filtered by the post-filter element to remove color and adjust the taste before flowing out through the faucet.

[0062] In this embodiment, the first filter assembly 100 is integrated into the first filter bottle 1. Of course, the pre-filter element 2c, the post-filter element and the first filter element 2a can also be integrated into the first filter bottle 1.

[0063] 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 by 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 channel 3c is formed in the connecting section 33. The flow port 311 is opened in the outer tube 31.

[0064] It should be noted that an inner tube 32 and an outer tube 31 are provided. Both inner tube 32 and outer tube 31 are circular tube-shaped. Inner tube 32 and outer tube 31 are sleeved on the outside of inner tube 32. Central flow channel 3a is located inside inner tube 32, and interlayer flow channel 3b is located between outer tube 31 and inner tube 32. That is, central flow channel 3a and interlayer flow channel 3b are separated by inner tube 32, so that central flow channel 3a and interlayer flow channel 3b are not connected to each other. Furthermore, a connecting section 33 is located between inner tube 32 and outer tube 31. The connecting section 33 connects the outside of outer tube 31 with the inside of inner tube 32, that is, connects the pure water side 21 of first filter element 2a with the water outlet channel. The connecting section 33 has an outer wall, which separates the first flow channel 3c within the connecting section 33 from the interlayer flow channel 3b outside the connecting section 33. Taking into account that the flow port 311 is used to connect the wastewater side 22 of the first 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 into the upper end of the first filter element 2a flows axially through the entire first filter element 2a to carry out the high concentration of salt ions in the first filter element 2a.

[0065] In one embodiment, see Figure 3 、 Figure 4 and Figure 6 The first filter assembly 100 also includes a first filter element 2a cover, which is connected to the lower end of the first filter element 2a. The inner tube 32 is exposed at the lower end of the outer tube 31. The first filter element 2a cover is provided with a sinking groove 41 corresponding to the inner tube 32. The inner tube 32 at least partially extends into the sinking groove 41. A first sealing ring 43 is provided between the groove wall of the sinking groove 41 and the outer wall of the inner tube 32.

[0066] It should be noted that, considering that the first filter element 2a will be soaked by the incoming raw water during operation, and the incoming raw water has a certain pressure, in order to prevent the first filter element 2a from being deformed, a first filter element 2a cover is provided, the first filter element 2a cover is glued to the first filter element 2a, and the outer periphery of the first filter element 2a cover is glued to the outer periphery of the first filter element 2a, thereby maintaining the shape of the first filter element 2a in the filtering mode.

[0067] To prevent interference between the sandwich flow channel 3b and the central flow channel 3a within the central tube 3, a sink 41 is provided on the cover of the first filter element 2a. A first sealing ring 43 is disposed between the wall of the sink 41 and the outer wall of the inner tube 32. This first sealing ring 43 prevents the central flow channel 3a and the sandwich flow channel 3b at the lower end of the central tube 3 from communicating with each other, preventing wastewater from the sandwich flow channel 3b from contaminating the pure water within the central flow channel 3a. Furthermore, a first receiving groove 411 is provided in the wall of the sink 41 for accommodating the first sealing ring 43. The first sealing ring 43 is partially exposed within the first receiving groove 411, thereby forming an interference fit with the inner tube 32 to form a sealed fit.

[0068] In one embodiment, please continue to refer to Figure 3 、 Figure 4 and Figure 6 The first filter element 2a cover is provided with a second flow channel 4a, the second flow channel 4a is connected to the sink 41 and the water storage gap 15 respectively, and the second flow channel 4a is opened along the radial direction of the first filter element 2a cover.

[0069] It should be noted that, in order to allow the water in the trough 41 to flow into the water storage gap 15, a second flow channel 4a is opened on the first filter element 2a cover, so that the water in the trough 41 can flow into the water storage gap 15 through the second flow channel 4a. It should be noted that during use, the opening of the second flow channel 4a toward the water storage gap 15 is downward, so that the gas in the water storage gap 15 is finally squeezed on the upper side of the second flow channel 4a, thereby preventing the gas in the water storage gap 15 from overflowing.

[0070] In one embodiment, please continue to refer to Figure 3 、 Figure 4 and Figure 6 The first filter element 2a cover has a surface 42 facing the side of the first filter element 2a, and the surface 42 is protruding with an annular rib 421, so that the first filter element 2a and the first filter element 2a cover are enclosed to form a flow cavity 4b, and the flow cavity 4b is connected to the flow port 311.

[0071] Specifically, the side of the first filter element 2a close to the first filter element 2a cover, that is, the water outlet side of the first filter element 2a, in order to enable the water outlet of the first filter element 2a to efficiently flow into the flow port 311, an annular rib 421 is protrudingly provided on the surface 42 of the first filter element 2a cover, and this annular rib 421 is abutted against the first filter element 2a, so that the annular rib 421, the surface 42 of the first filter element 2a cover and the first filter element 2a enclose a flow cavity 4b.

[0072] In one embodiment, see Figure 3 、 Figure 5 and Figure 6The first filter assembly 100 also includes a second filter element 2b cover, which is connected to the upper end of the first filter element 2a. The second filter element 2b cover is protrudingly provided with a first partition 51 and a second partition 52. The second partition 52 is located on the outside of the first partition 51. The first partition 51 and the second partition 52 separate the water inlet chamber 5a and the wastewater chamber 5b from the outside to the inside. The water inlet chamber 5a is connected to the water inlet side of the first filter element 2a, and the wastewater port 123 is connected to the interlayer flow channel 3b through the wastewater chamber 5b.

[0073] More specifically, the first filter element 2a cover is positioned at the lower end of the first filter assembly 100. Correspondingly, the second filter element 2b cover is positioned at the upper end of the first filter assembly 100. The second filter element 2b cover is also glued to the first filter element 2a and has a peripheral extension. This peripheral extension is also glued to the periphery of the first filter element 2a, thereby maintaining the first filter element 2a in the filtration mode. The second filter element 2b cover is provided with a first partition 51 and a second partition 52 projecting away from the first filter element 2a. These first and second partitions 51 and 52 separate two chambers from the inside out: a water inlet chamber 5a and a wastewater chamber 5b. The water inlet chamber 5a is used to direct raw water flowing from the first water inlet 121 to the water inlet side of the first filter element 2a. The wastewater chamber 5b is used to direct wastewater from the wastewater flow path to the wastewater outlet 123, thereby further improving the flow path within the first filter element 2a.

[0074] In one embodiment, see Figure 5 The central tube 3 also includes a stop plate 34, which is respectively connected to the inner tube 32 and the outer tube 31 to block the upper end of the interlayer flow channel 3b, and the outer tube 31 is provided with a water hole 312 connected to the wastewater chamber 5b.

[0075] It should be noted that to separate the central flow channel 3a and the sandwich flow channel 3b at the upper end of the central tube 3, the central tube 3 is also provided with a stop plate 34. The stop plate 34 is connected to the inner tube 32 and the outer tube 31, thereby blocking the upper end of the sandwich flow channel 3b and preventing wastewater in the sandwich flow channel 3b from contaminating the central flow channel 3a. A water hole 312 is provided in the outer tube 31, which communicates with the wastewater chamber 5b. This allows wastewater from the sandwich flow channel 3b to flow into the wastewater chamber 5b through the water outlet and finally out of the first filter bottle 1 through the wastewater outlet 123.

[0076] In one embodiment, please continue to refer to Figure 5 The 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 second filter element 2b cover together form a flow expansion cavity 3d, and the flow expansion cavity 3d is connected to the central flow channel 3a.

[0077] It should be noted that the extension section 313 is consistent with the axis of the outer tube 31, and the inner diameter of the extension section 313 is consistent with that of the outer tube 31, so the inner diameter of the extension section 313 is larger than the inner diameter of the inner tube 32. In this way, the expansion cavity 3d enclosed by the extension section 313, the stop plate 34 and the cover of the second filter element 2b has the effect 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.

[0078] In one embodiment, please continue to refer to Figure 5 The first filter bottle 1 is provided with an annular protrusion 82 portion 14 facing downward, the extension section 313 is inserted into the annular protrusion 82 portion 14 , and a second sealing ring 53 is provided between the extension section 313 and the annular protrusion 82 portion 14 .

[0079] Specifically, the first filter bottle 1 is provided with an annular protrusion 82 portion 14 that mates with the extension section 313, allowing the extension section 313 to be inserted into the annular protrusion 82 portion 14. A second sealing ring 53 is disposed between the extension section 313 and the annular protrusion 82 portion 14, forming a sealed fit. This prevents the pure water within the expansion chamber 3d from interchanging with the wastewater within the wastewater chamber 5b of the first filter bottle 1. More specifically, a second accommodating groove 313a is defined on the outer wall of the extension section 313, allowing the second sealing ring 53 to be partially accommodated within the second accommodating groove 313a. The remaining portion of the second sealing ring 53 is exposed through the notch of the second accommodating groove 313a, forming an interference fit and seal with the annular protrusion 82 portion 14. In other embodiments, the annular protrusion 82 portion 14 can be inserted into the extension section 313, forming a sealed fit between the outer wall of the annular protrusion 82 portion 14 and the inner wall of the extension section 313.

[0080] In one embodiment, see Figure 11 and Figure 12 The partition 7 includes a partition plate 71, a first partition cylinder 72 and a second partition cylinder 73. The first partition cylinder 72 and the second partition cylinder 73 are respectively connected to the opposite sides of the partition plate 71. The first filter element 2a is arranged in the first partition cylinder 72. The elastic member 8 is arranged between the second partition cylinder 73 and the cylinder body 9.

[0081] It should be noted that the partition 7 has multiple components, each of which has a function. Among them, the partition plate 71 mainly divides the filter bottle into a filtration area located above the partition plate 71 and a water storage reflux area located below the partition plate 71. Furthermore, the filtration area cooperates with the first partition cylinder 72 and the top of the filter bottle to form a first chamber 6a. This first chamber 6a is used for filtering the second filter element 2b, wherein the outside of the first partition cylinder 72 is the filtration area of ​​the pre-filter element 2c, and the filtration area of ​​the pre-filter element 2c and the filtration area of ​​the second filter element 2b in the filter bottle are not connected, and there is no interference. Considering that the service life of the second filter element 2b and the pre-filter element 2c is basically the same, the pre-filter element 2c and the second filter element 2b are set in the same second filter bottle 6 to facilitate replacement and installation.

[0082] In one embodiment, see Figure 11 and Figure 12 The elastic member 8 has a flange 81 , and the cylinder body 9 presses the flange 81 of the elastic member 8 to the bottom of the partition 7 .

[0083] Specifically, in this embodiment, the cylinder body 9 fixes the partition 7 by pressing the flange 81 between the elastic parts to the bottom of the partition 7, wherein a mounting groove 93 is formed between the main body 91 and the welding part 92 of the cylinder body 9, and the flange 81 of the elastic part 8 is set in the mounting groove 93.

[0084] In one embodiment, see Figure 11 and Figure 13 The cylinder body 9 is rotationally welded to the bottom of the second partition cylinder 73.

[0085] Specifically, the cylinder body 9 is rotationally welded to the bottom of the second partition 73, that is, one of the cylinder body 9 or the second partition 73 rotates relative to the other. The heat generated by high-speed friction causes the cylinder body 9 and / or the second partition 73 to be hot-melt welded together, thereby ensuring the fixing strength of the two, and being able to withstand greater water pressure and maintain a stable fixed relationship.

[0086] In one embodiment, see Figure 1 The cylinder body 9 includes a main body 91 and a welding portion 92 arranged on the outer periphery of the main body 91. The second partition 73 is provided with a welding groove 731 adapted to the first welding portion 92. The welding portion 92 is rotationally welded to the welding groove 731.

[0087] 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 outside of the main body 91. The welding part 92 can be rotated relative to the welding groove 731 so that any one of the welding part 92 and the groove wall of the welding groove 731 can be hot-melted, thereby fixing the cylinder body 9 and the second partition cylinder 73 together, so that it has better fixing strength.

[0088] In one embodiment, see Figure 10 A second water inlet 621 and a second water outlet 622 are provided on the first filter bottle 1. The second water inlet 621 is connected to the water inlet side of the second filter element 2b, and the second water outlet 622 is connected to the water outlet side of the second filter element 2b. A water flow channel 711 is provided on the partition plate 71. A water storage chamber 8b is formed between the partition plate 71 and the elastic member 8. The water flow channel 711 is respectively connected to the interior of the first partition cylinder 72 and the water storage chamber 8b.

[0089] In one embodiment, see Figure 11 and Figure 13 The elastic member 8 is provided with a protrusion 82 , and when the volume of the airbag cavity 8 a is restored, the protrusion 82 abuts against the partition plate 71 .

[0090] 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 reflux process, in this embodiment, when the airbag cavity 8a is not compressed, the protrusion 82 on the top of the airbag cavity 8a is made to contact the partition plate 71, thereby ensuring that the airbag cavity 8a has a sufficiently large volume.

[0091] In one embodiment, please continue to refer to Figure 11 and Figure 13 The elastic member 8 is provided with a plurality of pleated portions 83, so that the elastic member 8 can be compressed along a specified direction when the elastic member 8 is subjected to pressure, that is, the up and down direction in this embodiment, and can be compressed regularly, thereby avoiding uneven pressure on the elastic member 8, which may lead to serious pressure loss.

[0092] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by utilizing the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A water purification device, characterized in that: include: A first filter assembly includes a first filter bottle, a first filter element, and a center tube, wherein the first filter bottle is provided with a first water inlet and a first water outlet, the first filter element is sleeved on the center tube and disposed within the first filter bottle, the outer side of the first filter element is wrapped with a sealing layer, the center tube is provided with a first flow channel connected to the pure water side of the first filter element, a water storage gap is formed between the first filter bottle and the first filter element, and the water storage gap and the first water outlet are respectively connected within the center tube; a second filter assembly, connected to the first filter assembly by water, comprising a second filter bottle, a second filter element, a separator, an elastic member, and a cylinder; the separator being disposed in the second filter bottle, the separator dividing the second filter bottle into a first chamber and a second chamber disposed vertically, the first chamber and the second chamber being connected to each other; the second filter element being disposed in the first chamber; the elastic member being disposed in the second chamber; and the cylinder being connected to the bottom of the separator; the elastic member and the cylinder forming a compressible airbag cavity. Among them, one of the first filter element and the second filter element is a post-filter element, and the other is a reverse osmosis filter element. The gas in the water storage gap shrinks and becomes smaller in volume due to water pressure, and the airbag cavity shrinks and becomes smaller in volume due to water pressure.

2. The water purification device according to claim 1, characterized in that The first filter element is set as the first filter element, and the central tube is provided with a central flow channel and an interlayer flow channel separated from each other. The first filter bottle is also provided with a wastewater outlet, and the central flow channel is respectively connected to the first flow channel and the first water outlet, and the interlayer flow channel is respectively connected to the wastewater outlet and the wastewater side of the first filter element.

3. The water purification device according to 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 channel is formed in the connecting section. The flow port is opened in the outer tube.

4. The water purification device according to claim 3, characterized in that The water purification equipment also includes a first filter element cover, which is connected to the lower end of the first filter element. The inner tube is exposed at the lower end of the outer tube. The first filter element cover is provided with a sink corresponding to the inner tube. The inner tube at least partially extends into the sink, and a first sealing ring is provided between the groove wall of the sink and the outer wall of the inner tube.

5. The water purification device according to claim 4, characterized in that: The first filter element cover is provided with a second flow passage, the second flow passage is connected to the sink and the water storage gap respectively, and the second flow passage is opened along the radial direction of the first filter element cover.

6. The water purification device according to claim 3, characterized in that: The first filter element cover has a surface facing the first filter element, and an annular rib is protruding from the surface so that the first filter element and the first filter element cover are enclosed to form a flow cavity, and the flow cavity is connected to the interlayer flow channel.

7. The water purification device according to claim 4, characterized in that: The water purification equipment also includes a second filter element cover, which is connected to the upper end of the first filter element. The second filter element cover is protrudingly provided with a first partition and a second partition, and the second partition is located on the outside of the first partition. The first partition and the second partition separate the water inlet chamber and the wastewater chamber from the outside to the inside in sequence. The water inlet chamber is connected to the water inlet side of the first filter element, and the wastewater port is connected to the interlayer flow channel through the wastewater chamber.

8. The water purification device according to claim 7, characterized in that: The central tube further comprises a stop plate, which is respectively connected to the inner tube and the outer tube to block the upper end of the sandwich flow channel. The outer tube is provided with a water hole communicating with the wastewater cavity.

9. The water purification device according to claim 8, characterized in that The outer tube extends upward from the cutoff plate to form an extension section. The extension section, the cutoff plate and the second filter element cover together form a flow expansion cavity. The flow expansion cavity is connected to the central flow channel.

10. The water purification device according to claim 9, characterized in that: The first filter bottle is provided with an annular protrusion facing downward, the extension section is inserted into the annular protrusion, and a second sealing ring is provided between the extension section and the annular protrusion.

11. The water purification device according to claim 1, wherein: The partition includes a partition plate, a first partition cylinder and a second partition cylinder, the first partition cylinder and the second partition cylinder are respectively connected to opposite sides of the partition plate, the first filter element is arranged in the first partition cylinder, and the elastic member is arranged between the second partition cylinder and the cylinder body.

12. The water purification device according to claim 11, characterized in that: The elastic member has a flange, and the cylinder presses the flange of the elastic member onto the bottom of the partition.

13. The water purification device according to claim 12, characterized in that: The cylinder body is rotationally welded to the bottom of the second partition cylinder.

14. The water purification device according to claim 13, wherein: The cylinder body includes a main body and a welding portion arranged on the outer periphery of the main body, the second partition is provided with a welding groove adapted to the welding portion, and the welding portion is rotationally welded to the welding groove.

15. The water purification device according to claim 11, wherein: The filter bottle is provided with a second water inlet and a second water outlet, the second water inlet is connected to the water inlet side of the second filter element, the second water outlet is connected to the water outlet side of the second 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 member, and the water flow channel is respectively connected to the interior of the first partition cylinder and the water storage cavity.

16. The water purification device according to claim 15, characterized in that The elastic member is provided with a protrusion, and when the volume of the airbag cavity is restored, the protrusion contacts the partition plate.

17. The water purification device according to claim 15, characterized in that: The elastic member is provided with a plurality of folds, which are used to compress the elastic member in the up and down directions when the elastic member is pressed.

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