Composite filter element and water purification equipment

Abstract

The utility model discloses a composite filter element and water purification equipment, and relates to the technical field of water purification, the composite filter element comprises a filter bottle, a separator, a filter piece and an air bag, the filter bottle is provided with a water outlet, the separator is arranged in the filter bottle, a filter cavity and a buffer cavity are arranged in the separator, and the air bag is arranged in the filter bottle. The filtering part is installed in the filtering cavity, a pure water cavity is formed in the filtering part, the pure water cavity is communicated with the water outlet, water in the filtering cavity flows into the pure water cavity after being filtered by the filtering part, the air bag is installed in the temporary storage cavity, and the air bag is communicated with the water outlet. The air bag divides the temporary storage cavity into a water storage cavity and a first air storage cavity, and the filtering cavity is communicated with the water storage cavity; wherein the axial length of the filter bottle is L1, the length of the buffer cavity in the axial direction of the filter bottle is L2, and L2 is larger than or equal to L1 / 5 and smaller than or equal to L1 / 3. According to the technical scheme provided by the utility model, the taste of the first cup of water after the water purification equipment is started is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, in particular to a composite filter element and a water purification device. Background Art

[0002] When the existing water purification device is shut down and left standing for a long time, the internal water flow and pressure are unstable after restarting, resulting in the filter element being unable to reach its best state. As a result, the TDS of the first cup of pure water from the water purification device is relatively high, the quality of the first cup of pure water is low, and the water quality and taste cannot meet the needs of users. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose a composite filter element and a water purification device, aiming to improve the taste of the first cup of water after the water purification device is started.

[0004] To achieve the above object, the composite filter element proposed by the utility model includes:

[0005] A filter bottle, with a water outlet provided on the filter bottle;

[0006] A partition, installed inside the filter bottle, and a filtering cavity and a buffer cavity are provided inside the partition;

[0007] A filtering element, installed inside the filtering cavity, and a pure water cavity is provided inside the filtering element. The pure water cavity is communicated with the water outlet, and the water in the filtering cavity flows into the pure water cavity after being filtered by the filtering element; and

[0008] An airbag, installed inside the buffer cavity. The airbag divides the buffer cavity into a water storage cavity and a first air storage cavity, and the filtering cavity is communicated with the water storage cavity;

[0009] Wherein, the axial length of the filter bottle is L1, and the length of the buffer cavity along the axial direction of the filter bottle is L2, and L1 / 5 ≤ L2 ≤ L1 / 3.

[0010] In an embodiment, the inside of the airbag is the first air storage cavity, and the airbag and the cavity wall of the buffer cavity enclose to form the water storage cavity.

[0011] In an embodiment, the composite filter element further includes an end cap, with a second air storage cavity provided on the end cap. One end of the partition located in the first air storage cavity is open, the end cap is sealingly connected to the opening of the partition, and the first air storage cavity is communicated with the second air storage cavity.

[0012] In an embodiment, the length of the second air storage cavity along the axial direction of the filter bottle is L3, and L2 / 3 ≤ L3 ≤ L2 / 2.

[0013] In one embodiment, the length of the second air storage cavity in the axial direction of the filter bottle is L3, and L1 / 4 ≤ (L3 + L2) ≤ 2L1 / 5.

[0014] In one embodiment, the end cap is fixed to the partition member by spin welding, and the airbag is hermetically clamped between the end cap and the partition member.

[0015] In one embodiment, a first annular rib is provided on the side of the partition member facing the airbag, and a second annular rib is provided on the side of the end cap facing the airbag. When the airbag is clamped between the end cap and the partition member, both the first annular rib and the second annular rib are in contact with the airbag.

[0016] In one embodiment, at least one rib is provided on the wall of the water storage cavity, and the two side walls adjacent to the rib are respectively connected to the side wall and the bottom wall of the water storage cavity.

[0017] In one embodiment, the rib is triangular in shape.

[0018] The present utility model further provides a water purification device, including the composite filter element as described above.

[0019] The composite filter element in the technical solution of the present utility model includes a filter bottle, a partition member, a filtering member, and an airbag. The filter bottle is provided with a water outlet. The partition member is installed in the filter bottle, and a filtering cavity and a buffer cavity are provided in the partition member. The filtering member is installed in the filtering cavity, and a pure water cavity is provided in the filtering member. The pure water cavity is communicated with the water outlet. The water in the filtering cavity flows into the pure water cavity after being filtered by the filtering member. The airbag is installed in the buffer cavity, and the airbag divides the buffer cavity into a water storage cavity and a first air storage cavity. The filtering cavity is communicated with the water storage cavity. When the water pump in the water purification device starts, the water pressure in the filtering cavity is greater than the pressure in the first air storage cavity. At this time, the water in the filtering cavity will flow into the water storage cavity and compress the airbag to make it contract; when the water pump of the water purification device is turned off, the water pressure in the filtering cavity is less than the pressure in the first air storage cavity. At this time, the airbag will expand and the volume of the first air storage cavity will become larger, so that the water in the water storage cavity will flow back to the filtering cavity, and then the filtering member filters the water in the filtering cavity and flows into the pure water cavity. When the user opens the water outlet, the water in the pure water cavity can be drunk; thus, when the water purification device is restarted after being shut down and standing for a long time, the first glass of water that the user drinks is actually the water temporarily stored in the water storage cavity, the filtering cavity, and the pure water cavity, rather than the raw water pumped by the water pump, thereby avoiding the problem of high TDS of the first glass of water caused by unstable water flow and water pressure after the water purification device is turned on, improving the taste of the first glass of water after the water purification device is turned on, and further improving the user experience.

[0020] Further, the axial length of the filter bottle is L1, and the length of the buffer chamber along the axial direction of the filter bottle is L2, where L1 / 5 ≤ L2 ≤ L1 / 3. This increases the capacity of the buffer chamber, thereby increasing the capacity of the water storage chamber, further increasing the amount of water in the first cup after the water purification device is turned on, and further increasing the buffer time required for the water pressure and water flow to gradually return to stability after the water purification device is turned on, thereby improving the user experience. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 Structural schematic diagram of an embodiment of the composite filter element provided by the present invention;

[0023] Figure 2 For Figure 1 Cross-sectional view from one perspective;

[0024] Figure 3 For Figure 2 Local enlarged view at A in

[0025] Figure 4 For Figure 2 Local enlarged view at B in

[0026] Figure 5 For Figure 1 Structural schematic diagram of the separator from one perspective;

[0027] Figure 6 For Figure 5 Cross-sectional view from one perspective.

[0028] Explanation of the reference numerals in the drawings:

[0029] 1. Filter bottle; 11. Water outlet; 2. Separator; 21. Filtering chamber; 22. Buffer chamber; 221. Water storage chamber; 222. First air storage chamber; 23. Partition; 231. Water passing hole; 232. Mounting plate; 24. Rib; 25. First inner ring sealing rib; 26. First outer ring sealing rib; 3. Filter element; 31. Pure water chamber; 4. Airbag; 5. End cap; 51. Second air storage chamber; 52. Second inner ring sealing rib; 53. Second outer ring sealing rib.

[0030] The realization of the objectives, functional features, and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed Embodiments

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0032] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, 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 quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0034] Referring to Figures 1 to 3 , the present utility model provides a composite filter element, including:

[0035] A filter bottle 1, with a water outlet 11 provided on the filter bottle 1;

[0036] A separator 2, which is installed inside the filter bottle 1, and a filter cavity 21 and a buffer cavity 22 are provided inside the separator 2;

[0037] A filter element 3, which is installed inside the filter cavity 21, and a pure water cavity 31 is provided inside the filter element 3. The pure water cavity 31 is communicated with the water outlet 11, and the water in the filter cavity 21 flows into the pure water cavity 31 after being filtered by the filter element 3; and

[0038] An airbag 4, which is installed inside the buffer cavity 22. The airbag 4 divides the buffer cavity 22 into a water storage cavity 221 and a first air storage cavity 222, and the filter cavity 21 is communicated with the water storage cavity 221;

[0039] Among them, the axial length of the filter bottle 1 is L1, the length of the buffer chamber 22 along the axial direction of the filter bottle 1 is L2, and L1 / 5 ≤ L2 ≤ L1 / 3.

[0040] The composite filter element in the technical solution of the present utility model includes a filter bottle 1, a partition member 2, a filter member 3 and an airbag 4. The filter bottle 1 is provided with a water outlet 11. The partition member 2 is installed in the filter bottle 1, and a filter chamber 21 and a buffer chamber 22 are arranged in the partition member 2. The filter member 3 is installed in the filter chamber 21, and a pure water chamber 31 is arranged in the filter member 3. The pure water chamber 31 is communicated with the water outlet 11. The water in the filter chamber 21 flows into the pure water chamber 31 after being filtered by the filter member 3. The airbag 4 is installed in the buffer chamber 22. The airbag 4 divides the buffer chamber 22 into a water storage chamber 221 and a first air storage chamber 222. The filter chamber 21 is communicated with the water storage chamber 221. When the water pump in the water purification device starts, the water pressure in the filter chamber 21 is greater than the pressure in the first air storage chamber 222. At this time, the water in the filter chamber 21 will flow into the water storage chamber 221 and compress the airbag 4 to make it contract; when the water pump of the water purification device is turned off, the water pressure in the filter chamber 21 is less than the pressure in the first air storage chamber 222. At this time, the airbag 4 will expand and the volume in the first air storage chamber 222 will become larger, so that the water in the water storage chamber 221 will flow back to the filter chamber 21, and then the filter member 3 filters the water in the filter chamber 21 and flows into the pure water chamber 31. When the user opens the water outlet 11, the water in the pure water chamber 31 can be drunk; thus, when the water purification device is restarted after being shut down and left standing for a long time, the first glass of water that the user drinks is actually the water temporarily stored in the water storage chamber 221, the filter chamber 21 and the pure water chamber 31, rather than the raw water pumped by the water pump, thereby avoiding the problem that the TDS of the first glass of water is too high due to unstable water flow and water pressure after the water purification device is turned on, thereby improving the taste of the first glass of water after the water purification device is turned on, and further improving the user experience.

[0041] Furthermore, the axial length of the filter bottle 1 is L1, the length of the buffer chamber 22 along the axial direction of the filter bottle 1 is L2, and L1 / 5 ≤ L2 ≤ L1 / 3, thereby increasing the capacity of the buffer chamber 22, thereby increasing the capacity of the water storage chamber 221, further increasing the amount of the first glass of water after the water purification device is turned on, further increasing the buffer time required for the water pressure and water flow to gradually return to stability after the water purification device is turned on, and further improving the user experience.

[0042] Among them, total dissolved solids (English: Total dissolved solids, abbreviation TDS), also known as total dissolved solids, the measurement unit is milligrams per liter (mg / L), which indicates how many milligrams of dissolved solids are dissolved in 1 liter of water. The higher the TDS value, the more dissolved substances are contained in the water.

[0043] In this embodiment, the water storage chamber 221 is directly communicated with the filtration chamber 21, so that the water in the water storage chamber 221 will be re-filtered by the filter element 3 after standing still before being used by the user, thereby improving the taste of the user. Of course, in another embodiment, the water storage chamber 221 can also be directly communicated with the pure water chamber 31. That is, after the water filtered by the filter element 3 flows into the pure water chamber 31, a part of the water in the pure water chamber 31 flows into the user end through the water outlet 11, and the other part flows into the water storage chamber 221 for temporary storage.

[0044] Furthermore, the composite filter element further includes a reverse osmosis membrane. That is, when the water pressure in the filtration chamber 21 is less than the pressure in the first air storage chamber 222, the water in the filtration chamber 21 may flow into the reverse osmosis membrane for filtration, and then flow back to the filtration chamber 21 after filtration, and then flow into the pure water chamber 31 after being filtered by the filter element 3. Among them, the filter element 3 is a post-filter. The main function of the post-filter is to further filter the water before the water flows out of the water purification device to improve the taste of the water flow; the reverse osmosis membrane mainly uses its characteristics to filter out the salt ions in the water.

[0045] In the first embodiment, the inside of the airbag 4 is the first air storage chamber 222, and the airbag 4 and the wall of the buffer chamber 22 enclose to form the water storage chamber 221.

[0046] In the second embodiment, the inside of the airbag 4 is the water storage chamber 221, and the airbag 4 and the wall of the buffer chamber 22 enclose to form the first air storage chamber 222. At this time, the upper end of the airbag 4 is connected to the wall of the buffer chamber 22 and is communicated with the filtration chamber 21.

[0047] In the first embodiment, the composite filter element further includes an end cap 5. The end cap 5 is provided with a second air storage chamber 51. The partition member 2 is arranged at one end of the first air storage chamber 222 in an open manner. The end cap 5 is hermetically connected to the opening of the partition member 2, and the first air storage chamber 222 and the second air storage chamber 51 are communicated. By providing the end cap 5 and adding the second air storage chamber 51, the airbag 4 can be located in the second air storage chamber 51 when it contracts, which is equivalent to increasing the capacity of the water storage chamber 221, thereby increasing the amount of the first cup of water after the water purification device is turned on, increasing the buffer time required for the water pressure and water flow to gradually return to a stable state after the water purification device is turned on, and improving the user experience.

[0048] Specifically, the length of the second air storage chamber 51 in the axial direction of the filter bottle 1 is L3, and L2 / 3 ≤ L3 ≤ L2 / 2. This is equivalent to increasing the capacity of the water storage chamber 221, thereby increasing the amount of the first cup of water after the water purification device is turned on, increasing the buffer time required for the water pressure and water flow to gradually return to a stable state after the water purification device is turned on, and improving the user experience.

[0049] Further, the length of the second air storage cavity 51 in the axial direction of the filter bottle 1 is L3, and L1 / 4 ≤ (L3 + L2) ≤ 2L1 / 5. This is equivalent to increasing the capacity of the water storage cavity 221, thereby increasing the water volume of the first cup after the water purification device is turned on, further increasing the buffer time required for the water pressure and water flow to gradually return to stability after the water purification device is turned on, and thus improving the user experience.

[0050] In one embodiment, the end cap 5 is fixed to the partition member 2 by spin welding, and the airbag 4 is hermetically clamped between the end cap 5 and the partition member 2. The spin welding connection method is stable and reliable, and the welding speed is relatively fast, thus improving the production efficiency. Of course, in other embodiments, the connection between the end cap 5 and the partition member 2 can also be ordinary welding, screw attachment, riveting, etc.

[0051] Referring to Figure 2 and Figure 4 , it can be understood that if the sealing effect in the liquid storage cavity is not good, the water in the liquid storage cavity will flow into the interior of the filter bottle 1, or the water in other areas inside the filter bottle 1 will flow into the liquid storage cavity, resulting in the water in the liquid storage cavity being contaminated; if the air in the first air storage cavity 222 flows out, the pressure inside the airbag 4 will become smaller, and as a result, the airbag 4 may ultimately be unable to discharge the water in the water storage cavity 221 into the filtration cavity 21. Therefore, in one embodiment, a first annular rib is provided on the side of the partition member 2 facing the airbag 4, and a second annular rib is provided on the side of the end cap 5 facing the airbag 4. When the airbag 4 is clamped between the end cap 5 and the partition member 2, both the first annular rib and the second annular rib are in contact with the airbag 4.

[0052] Through the first annular rib and the second annular rib, the sealing effect between the airbag 4 and the partition member 2 and the end cap 5 is increased, thereby increasing the sealing effect of the water storage cavity 221 and the first air storage cavity 222, reducing the loss of water in the water storage cavity 221 and the loss of air in the first air storage cavity 222, and improving the stability and reliability of the composite filter element.

[0053] Further, the first annular rib includes a first inner-ring sealing rib 25 and a first outer-ring sealing rib 26, and the second annular rib includes a second inner-ring sealing rib 52 and a second outer-ring sealing rib 53. Among them, the first inner-ring sealing rib 25 and the first outer-ring sealing rib 26 are arranged between the airbag 4 and the partition 2 for double-layer sealing, thereby increasing the sealing effect between the airbag 4 and the partition 2, further reducing the possibility of water leakage in the water storage chamber 221, and further improving the stability and reliability of the composite filter element. The second inner-ring sealing rib 52 and the second outer-ring sealing rib 53 are arranged between the airbag 4 and the end cap 5 for double-layer sealing, thereby further increasing the sealing effect between the airbag 4 and the end cap 5, further reducing the possibility of gas leakage in the first gas storage chamber 222 and the second gas storage chamber 51, and further improving the stability and reliability of the composite filter element.

[0054] When the airbag 4 is attached to the wall of the water storage chamber 221, water molecules will form a thin water film on the contact surface between the airbag 4 and the wall of the water storage chamber 221. Due to the mutual force between water molecules (i.e., surface tension), this tight attachment due to surface tension actually forms a weak adsorption force. And the long-term adsorption of water molecules and possible corrosion may damage the material of the airbag 4, resulting in the aging, rupture or loss of elasticity of the airbag 4. Therefore, in an embodiment, at least one rib 24 is provided on the wall of the water storage chamber 221, and the two side walls adjacent to the rib 24 are respectively connected to the side wall and the bottom wall of the water storage chamber 221. That is, by providing the rib 24, the possibility of the airbag 4 being attached to the corner of the wall of the water storage chamber 221 is reduced, thereby reducing the surface tension generated between the airbag 4 and the wall of the water storage chamber 221, and further increasing the service life of the airbag 4.

[0055] Refer to Figure 2 , Figure 5 and Figure 6 , at the same time, it should be noted that only one rib 24 can be provided, or multiple ribs 24 can be provided at intervals. The rib 24 can not only reduce the possibility of the airbag 4 being attached to the corner of the wall of the water storage chamber 221, but also strengthen the wall of the water storage chamber 221, thereby increasing the structural strength of the partition 2, and further improving the stability and reliability of the partition 2.

[0056] Further, the rib 24 is triangularly arranged. Thereby further reducing the possibility of the airbag 4 being attached to the corner of the wall of the water storage chamber 221, thereby reducing the surface tension generated between the airbag 4 and the wall of the water storage chamber 221, and further increasing the service life of the airbag 4.

[0057] Preferably, the buffer chamber 22, the filtration chamber 21, and the pure water chamber 31 are coaxially arranged. By coaxially arranging the buffer chamber 22, the filtration chamber 21, and the pure water chamber 31, the size of the composite filter element in the radial direction is reduced, which is conducive to the miniaturization of the composite filter element.

[0058] In an embodiment, a partition plate 23 and a plurality of mounting plates 232 are provided on the separator 2. The separator 2 is divided into the filtration chamber 21 and the buffer chamber 22 by the partition plate 23. A water passing hole 231 is provided on the partition plate 23. The filtration chamber 21 and the buffer chamber 22 are communicated through the water passing hole 231. A plurality of the mounting plates 232 are all connected to the partition plate 23 and enclose to form a mounting groove. The filter element 3 is installed in the mounting groove, and a plurality of the mounting plates 232 are all arranged at intervals from the water passing hole 231. By providing the mounting plates 232, on the one hand, it is convenient to install the filter element 3, and on the other hand, the filter element 3 is spaced apart from the mounting hole through the mounting plates 232, avoiding the filter element 3 from blocking the water passing hole 231.

[0059] The present utility model also provides a water purification device, which includes a composite filter element. The specific structure of the composite filter element refers to the above embodiments. Since this water purification device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one. Among them, the water purification device can be a water purifier, a water dispenser with integrated water purification and drinking functions, a soft water and purification integrated machine, a water purification and heating integrated machine, and other products with water purification functions.

[0060] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A composite filter element, characterized in that, Comprising: A filter bottle, with a water outlet provided on the filter bottle; A partition member, which is installed inside the filter bottle, and a filter cavity and a buffer cavity are provided inside the partition member; A filter element, which is installed inside the filter cavity, and a pure water cavity is provided inside the filter element. The pure water cavity is communicated with the water outlet, and the water in the filter cavity flows into the pure water cavity after being filtered by the filter element; And An airbag, which is installed inside the buffer cavity. The airbag divides the buffer cavity into a water storage cavity and a first air storage cavity, and the filter cavity is communicated with the water storage cavity; Wherein, the axial length of the filter bottle is L1, the length of the buffer cavity in the axial direction of the filter bottle is L2, and L1 / 5 ≤ L2 ≤ L1 / 3.

2. The composite filter element according to claim 1, wherein The inside of the airbag is the first air storage cavity, and the airbag and the cavity wall of the buffer cavity enclose to form a water storage cavity.

3. The composite filter element according to claim 2, characterized in that, The composite filter element further includes an end cap, and a second air storage cavity is provided on the end cap. One end of the partition member located in the first air storage cavity is open, the end cap is hermetically connected to the opening of the partition member, and the first air storage cavity is communicated with the second air storage cavity.

4. The composite filter element according to claim 3, characterized in that, The height of the second air storage cavity in the axial direction of the filter bottle is L3, and L2 / 3 ≤ L3 ≤ L2 / 2.

5. The composite filter element according to claim 4, wherein The length of the second air storage cavity in the axial direction of the filter bottle is L3, and L1 / 4 ≤ (L3 + L2) ≤ 2L1 / 5.

6. The composite filter element according to claim 3, characterized in that, The end cap is fixed to the partition member by spin welding, and the airbag is hermetically clamped between the end cap and the partition member.

7. The composite filter element according to claim 3, wherein A first annular rib is provided on one side of the partition member facing the airbag, and a second annular rib is provided on one side of the end cap facing the airbag. When the airbag is clamped between the end cap and the partition member, both the first annular rib and the second annular rib are in contact with the airbag.

8. The composite filter element according to claim 1, wherein At least one rib is provided on the cavity wall of the water storage cavity, and the two adjacent side walls of the rib are respectively connected to the side wall and the bottom wall of the water storage cavity.

9. The composite filter element according to claim 8, characterized in that, The rib is triangular in shape.

10. A water purification device, characterized in that, Comprising the composite filter element according to any one of claims 1 to 9.

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