Water purifying apparatus

Abstract

The application discloses a water purification device, wherein the water purification device comprises a first filter assembly and a second filter assembly, the first filter assembly comprises a first filter bottle, a first filter core, a center pipe and an air bag piece, the second filter assembly is located downstream of the first filter assembly, the second filter assembly comprises a second filter bottle, a second filter core and an elastic piece, wherein the air bag piece is contracted in volume and becomes smaller under water pressure, the elastic piece is elastically deformed to a side far away from the water outlet channel under water pressure, and when the pressure is removed, the air bag piece expands and the elastic piece gradually recovers. According to the technical scheme, the pure water countercurrent design is adopted in the first filter assembly and the second filter assembly, the proportion of pure water in the first filter core and the second filter core is increased, the TDS value of the first cup of water taken by a user is reduced, the water quality and taste of the first cup of water are improved, and the demand of the user for purified water is met.

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 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.

[0003] The aforementioned TDS refers to Total Dissolved Solids (TDS), also known as the total amount of dissolved solids, and is measured in milligrams per liter (mg / L). It indicates how many milligrams of dissolved solids are dissolved in one liter of water. The higher the TDS value, the more dissolved substances are present in the water. Summary of the Invention

[0004] The main objective of this invention is to provide a water purification device that aims to improve the taste of the first glass of water after the device is turned on.

[0005] To achieve the above objectives, the water purification device proposed in this invention includes:

[0006] The first filtration assembly includes a first filter bottle, a first filter element, a central tube, and an airbag. The first filter element is sleeved on the central tube and located inside the first filter bottle. The central tube has a water passage hole, and the first filter bottle has a first water outlet. A water passage gap is formed between the first filter bottle and the first filter element. The central tube communicates with the first water outlet through the water passage gap, and the airbag is disposed inside the water passage gap.

[0007] 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 second filter element, and an elastic element. The second filter bottle forms a first cavity and a second cavity inside. The second filter element is located in the first cavity. The water outlet channel formed in the middle of the second filter element is connected to the second cavity. The elastic element is located in the second cavity.

[0008] In this filter element, 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. When the booster pump pressurizes, the air bladder shrinks and its volume decreases. The elastic element is elastically deformed by the water pressure towards the side away from the water outlet channel. When the pressure is released, the air bladder expands and the elastic element returns to its original state.

[0009] In one embodiment, the second filter assembly further includes an air bladder canister disposed within the second cavity, the interior of the air bladder canister communicating with the water outlet channel, and the elastic element located within the air bladder canister.

[0010] In one embodiment, the elastic element is provided in the form of a membrane, and the periphery of the elastic element is connected to the inner wall of the airbag canister. The elastic element divides the airbag canister into a water storage chamber and an air chamber, and the water storage chamber is connected to the water outlet channel.

[0011] In one embodiment, the second filtration assembly further includes a pre-filter and an inner cylinder located in the first cavity. The inner cylinder includes a connected cylindrical body and a first connecting portion. The first connecting portion extends from the cylindrical body toward the second filter bottle. The pre-filter is connected to the first connecting portion. The second filter is located inside the inner cylinder. The inner cylinder is used to separate the pre-filter and the second filter.

[0012] In one embodiment, the second filter assembly further includes an upper cap, the upper side of which is connected to the second filter element. The inner cylinder further includes a second connecting portion connected to the cylinder body, the second connecting portion extending toward the inner side of the cylinder body, and the second connecting portion being correspondingly disposed with the upper cap.

[0013] In one embodiment, the air bladder canister has a protruding water inlet section on the side near the second filter element, the second connecting portion has an opening in the middle, the water inlet section extends into the opening, and the outer side of the water inlet section is sealed to the wall of the opening.

[0014] In one embodiment, the outer wall of the water inlet section is provided with a receiving groove, and a sealing ring is provided in the receiving groove.

[0015] In one embodiment, the upper end cap is provided with a hollow guide section protruding toward the airbag canister, and the guide section matches the water inlet section.

[0016] In one embodiment, the second filter assembly further includes a lower end cap, the lower end cap having a water passage formed inside that communicates with the water outlet channel, through which pure water in the water outlet channel is discharged, the lower end cap being connected to the second filter element, and the second filter bottle having a first extension section extending toward the lower end cap inside, the lower end cap being sealed to the first extension section.

[0017] In one embodiment, the second filter assembly further includes a bottom cover, which is installed on the second filter bottle. The bottom cover has a second inlet, a second outlet, a third inlet, and a third outlet. The second inlet and the second outlet correspond to the pre-filter element, and the third inlet and the third outlet correspond to the second filter element.

[0018] In one embodiment, the airbag is disposed around the outside of the first filter element.

[0019] In one embodiment, the length of the airbag is less than the length of the first filter element.

[0020] In one embodiment, the height of the airbag component is L1, the height of the first filter element is L2, and L1 and L2 satisfy 1 / 3≤L1 / L2≤5 / 6.

[0021] In one embodiment, the airbag has a receiving cavity filled with a compressible medium.

[0022] In one embodiment, the first filter element is a reverse osmosis filter element, and the second filter element is a post-filter element.

[0023] In one embodiment, the first filter element includes an RO membrane, a first filter element cover, and a second filter element cover. The first filter element cover and the second filter element end cap are respectively connected to the first filter element. The second filter element cover is installed on the first filter bottle. The outer periphery of the first filter element has a sealing layer, which is used to separate the first filter element from the water passage gap.

[0024] In one embodiment, the middle part of the first filter element cover is provided with a connecting section protruding towards the first filter element, and a through groove is provided in the connecting section, which is connected to the flow path in the central tube.

[0025] In one embodiment, the upper surface of the first filter cover is recessed to provide a water passage, one side of the water passage is connected to the through groove, and the other side of the water passage is connected to the water gap.

[0026] The technical solution of this invention adopts a pure water counterflow design in both the first and second filter components, which increases the proportion of pure water in the first and second filter elements, reduces the TDS value of the first cup of water collected by the user, improves the water quality and taste of the first cup of water, and meets the user's needs for purified water. Attached Figure Description

[0027] 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.

[0028] Figure 1 This is a schematic diagram of the structure of the first filter component;

[0029] Figure 2 A schematic diagram showing the separation of the first filter element cover, RO membrane, central tube, and second filter element cover;

[0030] Figure 3 This is an exploded view of the first filter component;

[0031] Figure 4 This is a schematic diagram of the structure of the first filter component from a cross-sectional view.

[0032] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0033] Figure 6 This is a schematic diagram of the first filter component from another cross-sectional view.

[0034] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0035] Figure 8 Schematic diagram of the first filter element cover

[0036] Figure 9 This is a schematic diagram of the structure of the second filter component of the present invention;

[0037] Figure 10 This is a schematic diagram of the second filter component from a cross-sectional view.

[0038] Figure 11 for Figure 10 A schematic diagram showing the structure after removing the second filter element and sealing ring;

[0039] Figure 12 This is a schematic diagram of the airbag canister from a cross-sectional view.

[0040] Figure 13 This is an exploded view of the second filter component;

[0041] Figure 14 Exploded view of the pre-filter and post-filter components;

[0042] Figure 15 for Figure 11 Enlarged view of point C in the middle;

[0043] Figure 16 for Figure 11 Enlarged view of point D in the middle;

[0044] Figure 17 This is a schematic diagram of the bottom cover.

[0045] Explanation of icon numbers:

[0046]

[0047]

[0048] 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

[0049] 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.

[0050] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0051] 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.

[0052] As people increasingly pursue a higher quality of life, water quality has become a major concern. Water purifiers with reverse osmosis technology are gaining popularity because they produce fresher, more hygienic, and safer purified water. Raw water typically has a high total dissolved solids (TDS). The first filter, aided by a booster pump, blocks 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.

[0053] 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.

[0054] In the embodiments of the present invention, please refer to Figure 4 and Figure 10 The water purification device includes a first filter assembly 10 and a second filter assembly 20. The first filter assembly 10 includes a first filter bottle 100, a first filter element 200, a central tube 300, and an airbag component. The first filter element 200 is sleeved on the central tube 300 and located inside the first filter bottle 100. The central tube 300 has a water passage hole 310. The first filter bottle 100 has a first water outlet 132. A water passage gap 112 is formed between the first filter bottle 100 and the first filter element 200. The central tube 300 communicates with the first water outlet 132 through the water passage gap 112. The airbag component is disposed within the water passage gap 112. The second filter assembly 20 is located within the... Downstream of the first filter assembly 10, the second filter assembly 20 includes a second filter bottle 500, a second filter element 600, and an elastic element 710. The second filter bottle 500 forms a first cavity 510 and a second cavity 520 inside. The second filter element 600 is located in the first cavity 510. A water outlet channel 610 formed in the middle of the second filter element 600 communicates with the second cavity 520. The elastic element 710 is located in the second cavity 520. The air bladder 400 shrinks in volume under water pressure, and the elastic element 710 elastically deforms away from the water outlet channel 610 under water pressure. When the pressure is released, the air bladder 400 expands and the elastic element 710 gradually returns to its original state. In this filter element, one of the first filter element 200 and the second filter element 600 is a post-filter element, and the other is a reverse osmosis filter element. Alternatively, the first filter element 200 can be a reverse osmosis filter element and the second filter element 600 can be a post-filter element; or the first filter element 200 can be a post-filter element and the second filter element 600 can be a reverse osmosis filter element.

[0055] It should be noted in advance that the appendix Figure 4 and attached Figure 10 The vertical relationship between the first filter assembly 10 and the second filter assembly 20 shown in the text is only the position of the product in a certain state. In reality, the first filter assembly 10 of this product is installed horizontally along the axis of the first filter bottle 100 on the water circuit plate. Of course, it can also be installed as shown in the attached diagram. Figure 4 As shown, the first filter bottle 100 is vertically mounted on the water circuit board along its axial direction. Similarly, the second filter assembly 20 can be installed horizontally on the water circuit board along its axial direction, or as shown in the attached diagram. Figure 10 The filter bottle 500 is installed on the water circuit board along its axial direction.

[0056] Specifically, the first filter element 10 and the second filter element 20 are connected by a water pipe, and both the first filter element 10 and the second filter element 20 are installed on the water circuit board. The filtration sequence of the water purification equipment is as follows: first, the pre-filter 800 filters and adsorbs larger particles of impurities in the water, thus initially filtering the raw water; then, the RO membrane 210 of the first filter element 200 filters out most of the salt ions in the water; finally, the second filter element 600 filters out the color of the water and adjusts the taste of the pure water before it flows to the faucet.

[0057] In the first filter component 10, please refer to Figures 2 to 4 The first filter bottle 100 is used to house the components of the first filter assembly 10 and prevent interference with the internal water flow. The first filter bottle 100 has a first inlet 131, a first outlet 132, and a wastewater outlet 133. The first filter bottle 100 is connected to the outside only through the first inlet 131, the first outlet 132, and the wastewater outlet 133. Adjusting valves are installed in the first inlet 131, the first outlet 132, and the wastewater outlet 133, allowing adjustment of their opening to meet the actual operating requirements of the water purification equipment. The central pipe 300 is located inside the first filter element 200, providing support to the inside of the first filter element 200 and preventing structural deformation due to excessive water pressure, thereby ensuring unobstructed water flow from the first filter element 200. The airbag component 400 in this embodiment has the characteristic of shrinking in volume when subjected to pressure and restoring its volume when the pressure is removed. The airbag component 400 is an elastic structure filled with gas. The shape of the airbag component 400 can be sheet-like, block-like, or cylindrical, and is not specifically limited here.

[0058] In this embodiment, the first filter component 10 is integrated in the first filter bottle 100, and the second filter component 20 is integrated in the second filter bottle 500. Of course, the first filter component 10 and the second filter component 20 can also be integrated in the same filter bottle.

[0059] It should be noted that a booster pump is also installed inside the water purification equipment to pressurize the water entering the first filter element 200, thereby increasing the efficiency of the RO membrane 210 in filtering pure water. When the user starts to draw water, the first filter element 200 is in working mode, with the first inlet 131, the first outlet 132, and the wastewater outlet 133 all open, and the first filter element 200 continuously filters out pure water. When the user stops drawing water, the first outlet 132 immediately closes or gradually closes. At this time, the booster pump continues to pressurize, the first inlet 131 remains open for a period of time, and the wastewater outlet 133 is adjusted by the regulating valve to drain through a small hole. The first filter bottle 100 is in a high-pressure environment, so the air inside the first filter bottle 100 and the air bladder 400 are compressed under high pressure, making the amount of pure water in the central tube 300 and the water passage 112 higher than the amount of pure water when the air pressure inside the first filter bottle 100 is balanced with the outside. When the booster pump stops working, the air pressure inside the first filter bottle 100 is gradually restored due to the small hole of the wastewater outlet 133 adjusting the air pressure. Consequently, the compressed air and airbag 400 inside the first filter bottle 100 also recover their volume. The pressure brought by the recovery of the volume of the air and airbag 400 forces some of the pure water in the water passage gap 112 and the central tube 300 to flow back into the first filter element 200, thereby discharging a portion of the wastewater inside the first filter element 200.

[0060] In addition, please see Figures 10 to 13 In the second filter assembly 20, a water outlet channel 610 is formed in the middle of the second filter element 600 for leading out the water filtered by the second filter element 600. One end of the water outlet channel 610 is connected to the water outlet of the second filter element 600, and the other end is connected to the second cavity 520, so that a portion of the pure water filtered by the second filter element 600 flows into the second cavity 520. Furthermore, an elastic element 710 is provided inside the second cavity 520. It should be noted that the water entering the second filter element 600 is pressurized by a booster pump, thus exerting a strong pressure on the elastic element 710 inside the second cavity 520. Therefore, when the second filter element 600 is in filtration mode, the water pressure causes the elastic element 710 to elastically deform away from the water outlet channel 610. The elastic element 710 can be an air bladder structure or an elastic membrane; no specific limitation is made here. When the second filter element 600 stops working, the air pressure in the second chamber 520 gradually returns to normal, and the elastic element 710 gradually recovers its elasticity, causing the pure water in the water outlet channel 610 and the second chamber 520 to flow back into the second filter element 600, thereby increasing the proportion of pure water in the second filter element 600, which in turn increases the proportion of pure water in the first cup of water after the water purification equipment has been running, thus improving the taste of the first cup of water.

[0061] This allows for an increase in the proportion of pure water in the first filter element 200 and the second filter element 600, while reducing the proportion of wastewater in the first filter element 200. When the user takes the first cup of water next time, the TDS value will be lower, improving the water quality and taste of the first cup of water and meeting the user's needs for purified water.

[0062] The technical solution of this invention adopts a pure water counterflow design in both the first filter component 10 and the second filter component 20, which increases the proportion of pure water in the first filter element 200 and the second filter element 600, reduces the TDS value of the first cup of water taken by the user, improves the water quality and taste of the first cup of water, and meets the user's needs for purified water.

[0063] In one embodiment, please refer to Figure 3 and Figure 4 The airbag component 400 is arranged around the outside of the first filter element 200.

[0064] It should be noted that, considering that the first filter element 200 is cylindrical and the first filter bottle 100 is also cylindrical, the gap formed between the first filter element 200 and the first filter bottle 100 is an annular region. In order to make the airbag component 400 have a larger volume, thereby making the airbag component 400 have a larger compressible volume, and thus allowing more pure water to flow back into the first filter element 200 when the airbag component 400 recovers its volume, the airbag component 400 is arranged around the outside of the first filter element 200, so that the shape of the airbag component 400 matches the shape of the first filter element 200.

[0065] In one embodiment, please continue to refer to Figure 3 and Figure 4 The length of the airbag component 400 is less than the length of the first filter element 200.

[0066] It should be noted that, considering that the first filter element 200 is cylindrical and the first filter bottle 100 is also cylindrical, the gap formed between the first filter element 200 and the first filter bottle 100 is an annular region. In order to make the airbag component 400 have a larger volume, thereby making the airbag component 400 have a larger compressible volume, and thus allowing more pure water to flow back into the first filter element 200 when the airbag component 400 recovers its volume, the airbag component 400 is arranged around the outside of the first filter element 200, so that the shape of the airbag component 400 matches the shape of the first filter element 200.

[0067] In one embodiment, please refer to Figure 4 The height of the airbag component 400 is L1, and the height of the first filter element 200 is L2. The L1 and L2 satisfy 1 / 3≤L1 / L2≤5 / 6.

[0068] As described in the above embodiments, the length of the airbag component 400 is less than the length of the first filter element 200. Considering that if the length of the airbag component 400 is too small, the compressible volume of the airbag component 400 will be small, this embodiment further limits the ratio of the length of the airbag component 400 to the length of the first filter element 200 to be greater than or equal to 1 / 3. In addition, the length of the airbag component 400 cannot be too long; otherwise, the airbag component 400 may block the water passage connecting the water gap 112 to the central pipe 300 and the first outlet 132. Therefore, this embodiment further limits the ratio of the length of the airbag component 400 to the length of the first filter element 200 to be less than or equal to 5 / 6.

[0069] In one embodiment, please refer to Figure 4 The airbag component 400 has a accommodating cavity, which is filled with a compressible medium.

[0070] It should be noted that the airbag component 400 in this embodiment is actually an airbag structure. The airbag component 400 is filled with a compressible medium. Considering that the airbag structure has good compressibility, the compressible medium is set as an inert gas, such as helium, or other compressible gases or liquids.

[0071] In one embodiment, please refer to Figure 2 The first filter element 200 includes an RO membrane 210, a first filter element cover 220, and a second filter element cover 230. The first filter element cover 220 and the second filter element end cover are respectively connected to the first filter element 200. The second filter element cover 230 is installed on the first filter bottle 100. The outer periphery of the first filter element 200 has a sealing layer 211, which is used to separate the first filter element 200 from the water passage gap 112.

[0072] Specifically, the connection between the first filter element cover 220 and the first filter element 200 is achieved by adhesive bonding, thereby strengthening and fixing the RO membrane 210 through the first filter element cover 220 to prevent it from deforming under high water pressure. The first filter element cover 220 is located at one end of the first filter element 200, thus having two opposing sides. The first filter element cover 220 extends towards the side closer to the first filter element 200 to form a first limiting part 223. The first limiting part 223 is circumferentially disposed around the outer periphery of the first filter element 200, limiting and fixing it circumferentially to prevent the first filter element 200 from being deformed by water pressure impact, thereby improving the service life of the first filter element 200.

[0073] Secondly, the lower side of the second filter element cover 230 is mounted on the first filter bottle 100, thus fixing the second filter element cover 230 to the first filter bottle 100. The upper side of the second filter element cover 230 is connected to the first filter element 200 by adhesive bonding. This fixes one end of the first filter element 200 to the second filter element cover 230, preventing the first filter element 200 from being deformed or misaligned due to water pressure, thereby extending the service life of the first filter element 200. It should be noted that the second filter element cover 230 is located at one end of the first filter element 200, so the second filter element cover 230 has two opposite sides. The second filter element cover 230 extends towards the side closer to the first filter element 200 to form a second limiting part 231. The second limiting part 231 is circumferentially disposed around the outer periphery of the first filter element 200, limiting and fixing it circumferentially to prevent the first filter element 200 from being deformed by water pressure, thus improving the service life of the first filter element 200.

[0074] A sealing layer 211 is disposed on the outer periphery of the first filter element 200. Considering that the water inlet is located at one end of the first filter element 200, the water enters the first filter element 200 from one end, and the water inlet is close to the outer periphery of the first filter element 200. Therefore, the sealing layer 211 seals the outer periphery of the first filter element 200 to prevent the water to be filtered from flowing into the water passage gap 112 and contaminating the pure water, thereby achieving the technical solution. Specifically, the sealing layer 211 is made of glass flakes impregnated with resin and wound around the outer periphery of the first filter element 200. After the resin solidifies, it fills the gaps between the glass flakes, allowing the sealing layer 211 to isolate the water passage gap 112 from the first filter element 200. In order to achieve a sealing effect between the outer periphery of the first filter element 200 and the water passage gap 112, the sealing layer 211 is not only set on the outer periphery of the RO membrane 210, but also on the outer periphery of the first filter element cover 220 and the second filter element cover 230, ensuring that the pure water in the water passage gap 112 is always at a low TDS value and is not contaminated by the raw water circuit.

[0075] In one embodiment, please refer to Figure 5 The first filter element cover 220 has a connecting section 221 protruding towards the first filter element 200 in the middle. A through groove 221a is provided in the connecting section 221, and the through groove 221a is connected to the flow path in the central tube 300.

[0076] Specifically, the first filter cover 220 is used to fix the RO membrane 210. The upper side of the first filter cover 220 is close to the inner wall of the first end cover 120. The first filter cover 220 also has the function of guiding the pure water in the central tube 300 to the water passage 112. Therefore, a connecting section 221 protruding towards the first filter 200 is provided in the middle of the first filter cover 220. A through groove 221a is provided in the connecting section 221, through which the central tube 300 and the water passage 112 can be connected.

[0077] In one embodiment, please refer to Figure 8 The upper surface of the first filter cover 220 is recessed and provided with a water passage 222. One side of the water passage 222 is connected to the through groove 221a, and the other side of the water passage 222 is connected to the water gap 112.

[0078] As described in the above embodiments, a water passage 222 is provided at the bottom of the first filter cover 220. One side of the water passage 222 is connected to a through groove 221a, and the other side is connected to a water gap 112. Considering that the upper surface of the first filter cover 220 is circular, and the through groove 221a is approximately located at the center of the first filter cover 220, the number of water passages 222 can be one, two, or more. In this embodiment, four water passages 222 are provided, two of which are arranged in a straight line, and the other two are also arranged in a straight line. The included angle between two adjacent water passages 222 is 90°. Providing multiple water passages 222 can accommodate high-flow-rate water purification equipment.

[0079] In one embodiment, please refer to Figure 3 The first filter bottle 100 includes a bottle body 110, a first end cap 120 and a second end cap 130. The bottle body 110 has an opening 111 on the side near the first end cap 120. The first end cap 120 is connected to the bottle body 110 to seal the opening 111. The second end cap 130 is installed on the end of the bottle body 110 away from the opening 111.

[0080] It should be noted that the first filter bottle 100 has an opening 111 at the top to house other components such as the first filter element 200. The first end cap 120 is installed on the opening 111. The installation method can be that the first end cap 120 is hinged to the first filter bottle 100 and the first filter bottle 100 is covered on the opening 111, or the first end cap 120 is glued to the first filter bottle 100. In this embodiment, the opening 111 is sealed by welding the first end cap 120 to the first filter bottle 100 to achieve a better seal between the first filter bottle 100 and the first end cap 120.

[0081] Further, please refer to Figure 6 and Figure 7 The first outlet 132 is provided on the second end cap 130. The second end cap 130 is also provided with a first inlet 131 and a wastewater outlet 133. The first inlet 131 and the wastewater outlet 133 are provided corresponding to the RO membrane 210.

[0082] In the above embodiments, it has been explained that the first inlet 131, the first outlet 132, and the wastewater outlet 133 are located in the first filter bottle 100. Furthermore, the first inlet 131, the first outlet 132, and the wastewater outlet 133 are located in the second end cap 130, and the first inlet 131 and the wastewater outlet 133 correspond to one end of the RO membrane 210. This simplifies the water circuit design and reduces the space occupied, thus miniaturizing the second filter component 20.

[0083] Secondly, regarding the second filtering component, in this embodiment, please refer to... Figure 10 and Figure 11 The second filter assembly 20 also includes an air bladder 700, which is disposed inside the second cavity 520. The interior of the air bladder 700 is connected to the water outlet channel 610, and the elastic element 710 is located inside the air bladder 700.

[0084] In the above embodiment, the elastic element 710 is disposed in the second cavity 520, and the water flows directly into the second cavity 520. If the second cavity 520 is not well sealed, the pure water circuit may be contaminated by other water circuits, and pure water may also leak out from the second filter bottle 500, causing water leakage. Therefore, in this embodiment, an air bladder 700 is disposed in the second cavity 520. The air bladder 700 is an integrated unit with good sealing performance. The interior of the air bladder 700 is directly connected to the water outlet channel 610 to avoid the pure water circuit being contaminated by external water circuits.

[0085] In one embodiment, please refer to Figures 10 to 12 The elastic element 710 is membrane-shaped and its periphery is connected to the inner wall of the airbag canister 700. The elastic element 710 divides the airbag canister 700 into a water storage chamber 720 and an air chamber 730. The water storage chamber 720 is connected to the water outlet channel 610.

[0086] It should be noted that when the second filter element 600 is in filtration mode, the pure water in the outlet channel 610 flows into the water storage tank 720. The elastic element 710 is elastically deformed away from the outlet channel 610 by the pure water pressure. The air chamber 730 is compressed by the elastic element 710 and its volume decreases. When the second filter element 600 stops working, the air pressure in the second filter bottle 500 gradually returns to equilibrium, and the gas in the air chamber 730 gradually recovers. The elastic element 710 gradually recovers its elasticity, causing the pure water in the water storage tank 720 and the outlet channel 610 to flow back into the second filter element 600. This increases the proportion of pure water inside the second filter element 600, increases the amount of pure water in the first cup of water, and improves the taste of the first cup of water the user gets next time.

[0087] In one embodiment, please refer to Figure 10The pre-filter element 800 includes an inner cylinder 810, a pre-filter element 800, a first cover 950, and a second cover 960. It should be noted that the inner cylinder 810 includes a cylinder body 811, a first connecting portion 812, and a second connecting portion 813. The first connecting portion 812 extends from the cylinder body 811 toward the second filter bottle 500, and the second connecting portion 813 extends from the cylinder body 811 toward its inner side. The first connecting portion 812 is used to fix and limit one end of the pre-filter element 800. The pre-filter element 800 and the first connecting portion 812 are connected, thereby better securing the pre-filter element 800. In this embodiment, the connection between the pre-filter element 800 and the first connecting portion 812 is by adhesive bonding. In addition, the first cover 950 fixes the other end of the pre-filter 800. The first cover 950 is glued to the other end of the pre-filter 800. In this way, both ends of the pre-filter 800 can be fixed, so that the pre-filter 800 is not easily deformed by water pressure.

[0088] The cylindrical body 811 separates the pre-filter element 800 and the second filter element 600, ensuring that the inlet and outlet water paths of the pre-filter element 800 and the second filter element 600 do not interfere with each other. The first connecting part 812 and the second connecting part 813 divide the interior of the second filter bottle 500 into a first cavity 510 and a second cavity 520. The first cavity 510 is located below the first connecting part 812 and the second connecting part 813 and is used to house the pre-filter element 800 and the second filter element 600. The second cavity 520 is located above the first connecting part 812 and the second connecting part 813.

[0089] The first cover 950 and the second cover 960 are respectively disposed at the bottom of the pre-filter 800 and the inner cylinder 810. The first cover 950 is used to support and fix the pre-filter 800, and the bottom surface of the pre-filter 800 is bonded to the surface of the first cover 950. The second cover 960 is used to support the lower end of the inner cylinder 810, and the second cover 960 and the inner cylinder 810 are sealed together to avoid interference between the water circuit of the pre-filter 800 and the water circuit of the second filter 800.

[0090] It should be noted that the bottom of the second filter bottle 500 has a positioning pin 570. The positioning pin 570 cooperates with the mounting base to limit the relative position of the second filter bottle 500. This installation method has the following advantages: When the second filter element 600 is in working mode, under the influence of water pressure, the gas inside the second filter element 600 will continuously move upward. Finally, the gas will accumulate at the top of the water storage tank 720 and be compressed. When the second filter element 600 stops working, the compressed gas in the water storage tank 720 gradually recovers its volume, thereby increasing the amount of pure water flowing back to the second filter element 600 in the water storage tank 720 and the water outlet channel 610, and further increasing the amount of pure water in the first cup.

[0091] More specifically, the pre-filter 800 and the second filter 600 are sealed to each other. Apart from the sealed air bladder 700, the only connections to the second filter 600 are the water inlet and the water outlet. When the user draws water, the water inlet and the water outlet of the second filter 600 open simultaneously, and the booster pump runs, putting the second filter 600 assembly inside the inner cylinder 810 into a high-pressure environment. This compresses the gas inside the inner cylinder 810 and causes the elastic element 710 to deform elastically away from the water outlet channel 610, allowing the water outlet channel 610 and the water storage tank 720 to hold more pure water filtered by the second filter 600. When the user stops drawing water, the outlet of the second filter element 600 is closed, and the inlet of the second filter element 600 is opened with a small hole. The pressure inside the inner cylinder 810 gradually recovers, the air volume in the outlet channel 610 and the water storage tank 720 recovers, and the elastic element 710 recovers its elasticity. The pressure brought by the recovery of air volume and the elastic element 710 causes some of the pure water in the outlet channel 610 and the water storage tank 720 to flow back into the second filter element 600. Furthermore, it can also return to the water path at the front end of the second filter element 600 through the inlet of the second filter element 600, or return to the outlet of the first filter element 200.

[0092] To further improve the sealing performance between the airbag canister 700 and the water outlet channel 610, in a preferred embodiment, please refer to... Figure 12 The airbag canister 700 has a protruding water inlet section 740 near the second filter element 600. The water inlet section 740 is hollow and connects to the water storage tank 720 inside the airbag canister 700. An opening 813a is provided in the middle of the second connecting part 813, and the water inlet section 740 extends into the opening 813a to connect the water outlet channel 610 and the water storage tank 720. The upper end cover 910 also has a protruding hollow guide section 911. The guide section 911 and the water inlet section 740 are matched. Specifically, the guide section 911 extends into the water inlet section 740; alternatively, the water inlet section 740 extends into the guide section 911; or the inlet of the water inlet section 740 is aligned with the inlet of the guide section 911. In this embodiment, the water inlet section 740 is sealed to the wall of the opening 813a. Alternatively, the water inlet section 740 can be sealed to the guide section 911. The water inlet section 740 can be sealed to the wall of the opening 813a by means of a sealing ring 742 or by adhesive bonding; no specific limitation is made here.

[0093] This application seals the connection between the water storage tank 720 and the water outlet channel 610, ensuring that the interior of the water storage tank 720 and the water outlet channel 610 is not exposed to external air pressure at this point. Consequently, when water enters the second filter element 600, the internal pressure of the post-filter assembly and the air bladder tank 700 continuously increases. Similarly, this ensures the cleanliness of the pure water path, thereby improving the taste of the first cup of water dispensed after the water purifier is turned on.

[0094] According to the above embodiments of this application, optionally, please continue to refer to... Figure 10 and Figure 12 A sealing ring 742 is provided between the outer side of the water inlet section 740 and the wall of the opening 813a. The sealing ring 742 is press-fitted with the walls of the water inlet section 740 and the opening 813a respectively, thereby achieving a seal between the water inlet section 740 and the second connecting part 813.

[0095] In this embodiment, the water inlet section 740 and the second connecting part 813 are sealed by the sealing ring 742, which facilitates the assembly between the airbag tank 700 and the inner cylinder 810. If the airbag tank 700 is not properly assembled, it can be disassembled and reinstalled. Compared with adhesive sealing, it has the advantage of being adjustable to a better installation position.

[0096] Alternatively, please continue reading Figure 12 Considering that the sealing ring 742 has a certain thickness, a receiving groove 741 can be provided on the outer wall of the water inlet section 740 for easy assembly. The receiving groove 741 is used to limit the sealing ring 742, so the shape of the receiving groove 741 matches the sealing ring 742. In this embodiment of the invention, the sealing ring 742 is arranged in a ring shape, so the receiving groove 741 is also set as a ring shape. When the water inlet section 740 is inserted into the opening 813a, the sealing ring 742 is fixed in position in the receiving groove 741 and is not easy to flip, thus resulting in the sealing ring 742 having a uniform height in the axial direction of the water inlet section 740, so that the airbag canister 700 can be installed in place.

[0097] Further, in this embodiment, please refer to Figure 15 Optionally, the guide section 911 extends into the inlet section 740, and the outer diameter of the guide section 911 is the same as the inner diameter of the inlet section 740. It should be noted that the same inner diameter can mean that the outer diameter of the guide section 911 is equal to the inner diameter of the inlet section 740, or the inner diameter of the inlet section 740 is slightly larger than the outer diameter of the guide section 911, so that the pure water flowing through the guide section 911 can directly enter the water storage tank 720 through the inlet section 740.

[0098] In one embodiment, please refer to Figure 10 and Figure 14The second filter assembly 20 further includes a lower end cap 920, the lower end cap 920 having a water passage 921 communicating with the water outlet channel 610, through which pure water in the water outlet channel 610 is discharged. The lower end cap 920 is connected to the second filter element 600, and the second filter bottle 500 has a first extension section 530 extending toward the lower end cap 920, the lower end cap 920 being sealed to the first extension section 530.

[0099] Specifically, the first extension 530 and the lower end cap 920 can be sealed by adhesive bonding or by a sealing ring 742. In this embodiment, please refer to... Figure 14 and Figure 16 The first extension section 530 and the lower end cover 920 are sealed together by a sealing ring 742. Furthermore, to limit the sealing ring 742, in this embodiment, a receiving groove is provided on the lower end cover 920 to limit the sealing ring 742 within the receiving groove, facilitating a sealed connection between the upper end cover 910 and the first extension section 530. Alternatively, a receiving groove can be provided on the first extension section 530 to limit the sealing ring 742.

[0100] By sealing the first extension section 530 and the lower end cover 920 together, the relative position of the lower end cover 920 can be fixed. Furthermore, the lower end cover 920 has a water passage 921 inside that guides pure water outflow. By sealing the lower end cover 920 and the first extension section 530 together, the pure water passage in the water passage 921 can be prevented from interfering with other water passages, thus preventing the pure water passage from being contaminated.

[0101] For further information, please refer to [link / reference]. Figure 14 and Figure 16 The second filter bottle 500 has a second extension section 540 extending toward the first cover 950. It should be noted that the second extension section 540 is arranged in a ring shape, and the first cover 950 is sealed to the second extension section 540. Therefore, the second extension section 540 is sealed to the first cover 950 in the circumferential direction.

[0102] Specifically, the second extension segment 540 and the first cover 950 can be sealed by adhesive bonding or by a sealing ring 742. In this embodiment, the second extension segment 540 and the first cover 950 are sealed together by the sealing ring 742. Furthermore, to limit the sealing ring 742, in this embodiment, a receiving groove is provided on the first cover 950 to limit the sealing ring 742 within the receiving groove, facilitating the sealing connection between the first cover 950 and the second extension segment 540. Alternatively, a receiving groove can be provided on the second extension segment 540 to limit the sealing ring 742.

[0103] In summary, by sealing the second extension 540 with the first cover 950, the relative position of the first cover 950 can be fixed, and the water channels within the second filter bottle 500 can be prevented from interfering with each other.

[0104] Furthermore, please continue reading Figure 14 and Figure 16 The second filter bottle 500 has a third extension section 550 extending toward the second cover 960. It should be noted that the third extension section 550 is arranged in a ring shape, and the second cover 960 is sealed to the third extension section 550. Therefore, the third extension section 550 is sealed to the second cover 960 in the circumferential direction.

[0105] Specifically, the third extension section 550 and the second cover 960 can be sealed by adhesive bonding or by a sealing ring 742. In this embodiment, the third extension section 550 and the second cover 960 are sealed together by the sealing ring 742. Further, to limit the sealing ring 742, in this embodiment, a receiving groove is provided on the second cover 960 to limit the sealing ring 742 within the receiving groove, facilitating the sealing connection between the second cover 960 and the third extension section 550. Alternatively, a receiving groove can be provided on the third extension section 550 to limit the sealing ring 742.

[0106] It can be concluded that by sealing the third extension section 550 with the second cover 960, the relative position of the second cover 960 can be fixed, and the water channels in the second filter bottle 500 can be prevented from interfering with each other.

[0107] In one embodiment, please refer to Figure 17 The second filter assembly 20 further includes a bottom cover 940, which is installed on the second filter bottle 500. The bottom cover 940 has a second water inlet 941, a second water outlet 942, a third water inlet 943, and a third water outlet 944. The second water inlet 941 and the second water outlet 942 correspond to the pre-filter 800, and the third water inlet 943 and the third water outlet 944 correspond to the second filter 600.

[0108] It should be noted that you should refer to [link / reference]. Figure 17The second filter assembly 20 has a second inlet 941 and a second outlet 942 for water intake and outlet of the pre-filter assembly. The second filter assembly 20 also has a third inlet 943 and a third outlet 944 for water intake and outlet of the post-filter assembly. The inlets and outlets can be located on the second filter bottle 500, but in this embodiment, as shown in the figure, the second inlet 941, the second outlet 942, the third inlet 943, and the third outlet 944 are located on the bottom cover 940. The second inlet 941 and the second outlet 942 correspond to the pre-filter element 800, and the third inlet 943 and the third outlet 944 correspond to the second filter element 600.

[0109] Further, please refer to Figure 13 The second filter assembly 20 also includes a top cover 930, and the second filter bottle 500 has an installation port 560 on its upper side. The top cover 930 is attached to the second filter bottle 500 to seal the installation port 560.

[0110] 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 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 first filter element, a central tube, and an airbag. The first filter element is sleeved on the central tube and located inside the first filter bottle. The central tube has a water passage hole, and the first filter bottle has a first water outlet. A water passage gap is formed between the first filter bottle and the first filter element. The central tube communicates with the first water outlet through the water passage gap, and the airbag is disposed inside the water passage 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 second filter element, and an elastic element. The second filter bottle forms a first cavity and a second cavity inside. The second filter element is located in the first cavity. The water outlet channel formed in the middle of the second filter element is connected to the second cavity. The elastic element is located in the second 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. When the booster pump pressurizes, the air bladder shrinks and its volume decreases. The elastic element is subjected to pressure and elastically deforms towards the side away from the water outlet channel. When the pressure is released, the air bladder expands and the elastic element returns to its original state. The second filter assembly further includes an air bladder canister disposed within the second cavity. The interior of the air bladder canister is connected to the water outlet channel. The elastic element is located inside the air bladder canister. The elastic element is membrane-shaped, and its periphery is connected to the inner wall of the air bladder canister. The elastic element divides the interior of the air bladder canister into a water storage chamber and an air chamber. The water storage chamber is connected to the water outlet channel.

2. The water purification equipment as described in claim 1, characterized in that, The second filtration assembly further includes a pre-filter and an inner cylinder located in the first cavity. The inner cylinder includes a connected cylindrical body and a first connecting portion. The first connecting portion extends from the cylindrical body toward the second filter bottle. The pre-filter is connected to the first connecting portion. The second filter is located inside the inner cylinder. The inner cylinder is used to separate the pre-filter and the second filter.

3. The water purification equipment as described in claim 2, characterized in that, The second filter assembly further includes an upper end cap, the upper side of which is connected to the second filter element. The inner cylinder also includes a second connecting part connected to the cylinder body, the second connecting part extending toward the inner side of the cylinder body, and the second connecting part being correspondingly provided with the upper end cap.

4. The water purification equipment as described in claim 3, characterized in that, The air bladder canister has a protruding water inlet section on the side near the second filter element. The second connecting part has an opening in the middle. The water inlet section extends into the opening, and the outer side of the water inlet section is sealed to the wall of the opening.

5. The water purification equipment as described in claim 4, characterized in that, The outer wall of the water inlet section is provided with a receiving groove, and a sealing ring is provided in the receiving groove.

6. The water purification equipment as described in claim 5, characterized in that, The upper end cap protrudes towards the air bladder and is provided with a hollow guide section, which matches the water inlet section.

7. The water purification equipment as described in claim 6, characterized in that, The second filter assembly also includes a lower end cap, the lower end cap having a water passage formed inside that communicates with the water outlet channel, through which pure water in the water outlet channel is discharged, the lower end cap being connected to the second filter element, and the second filter bottle having a first extension section extending toward the lower end cap inside, the lower end cap being sealed to the first extension section.

8. The water purification equipment as described in claim 7, characterized in that, The second filter assembly also includes a bottom cover, which is installed on the second filter bottle. The bottom cover has a second water inlet, a second water outlet, a third water inlet, and a third water outlet. The second water inlet and the second water outlet correspond to the pre-filter element, and the third water inlet and the third water outlet correspond to the second filter element.

9. The water purification equipment as described in claim 1, characterized in that, The airbag component is arranged around the outside of the first filter element.

10. The water purification equipment as described in claim 9, characterized in that, The length of the airbag component is less than the length of the first filter element.

11. The water purification equipment as described in claim 10, characterized in that, The height of the airbag component is L1, and the height of the first filter element is L2. The L1 and L2 satisfy 1 / 3≤L1 / L2≤5 / 6.

12. The water purification equipment as described in claim 11, characterized in that, The airbag has a cavity that is filled with a compressible medium.

13. The water purification equipment as described in claim 1, characterized in that, The first filter element is a reverse osmosis filter element, and the second filter element is a post-filter element.

14. The water purification equipment as described in claim 13, characterized in that, The first filter element includes an RO membrane, a first filter element cover, and a second filter element cover. The first filter element cover and the second filter element end cap are respectively connected to the first filter element. The second filter element cover is installed on the first filter bottle. The outer periphery of the first filter element has a sealing layer, which is used to separate the first filter element from the water passage gap.

15. The water purification equipment as described in claim 14, characterized in that, The first filter element cover has a connecting section protruding towards the first filter element in the middle, and a through groove is formed in the connecting section, which is connected to the flow path in the central tube.

16. The water purification equipment as described in claim 15, characterized in that, The upper surface of the first filter element cover is recessed and has a water passage. One side of the water passage is connected to the through groove, and the other side of the water passage is connected to the water gap.

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