Water storage composite filter element and water purification equipment

Abstract

The utility model discloses a water storage composite filter element and water purification equipment, the water storage composite filter element comprises a filter element shell, a front filter element, a rear filter element and a water storage bag, the filter element shell is provided with a first water inlet, a second water inlet, a first water outlet and a second water outlet; the water storage bag is connected with the filter element shell to divide an inner cavity of the filter element shell into a raw water cavity and a pure water cavity, the front filter element is arranged in the raw water cavity, the rear filter element is arranged in the pure water cavity, the first water inlet and the first water outlet are both communicated with the raw water cavity, and the second water inlet and the second water outlet are both communicated with the pure water cavity. Raw water enters the raw water cavity from the first water inlet, and purified water filtered by the front filter element flows out of the water storage composite filter element from the first water outlet; the purified water flows out and is further treated by the membrane filter element to obtain pure water, the pure water enters the pure water cavity from the second water inlet, is filtered again by the rear filter element and flows out from the second water outlet, and the water storage bag can store the pure water so as to flush the membrane filter element and reduce the TDS of concentrated water side water of the membrane filter element.

Description

Technical Field

[0001] This utility model relates to the field of water purification technology, and in particular to a water storage composite filter element and water purification equipment. Background Technology

[0002] As people's living standards improve, they are paying more and more attention to water quality and hygiene, and equipping households with water purification equipment has become a trend. Most existing water purification equipment uses membrane filters to produce purified water. However, after water production stops, the ion concentration of the concentrated water on the membrane filter side is much higher than that on the pure water side. Due to the influence of natural osmosis (forward osmosis), ions from the concentrated water side will seep into the pure water side. This results in the first batch of pure water having an excessively high TDS (total dissolved solids) when the water purifier is left to stand for a period of time after stopping water production and then being taken out again, which affects the user's water intake experience. Utility Model Content

[0003] The purpose of this utility model is to provide a water storage composite filter element and a water purification device to solve the technical problem that the TDS of the first pure water is too high when the water purification device stops producing water and is left to stand for a period of time before taking water again.

[0004] This utility model provides a water storage composite filter element, including a filter element housing, a pre-filter element, a post-filter element, and a water storage bag. The filter element housing is provided with a first water inlet, a second water inlet, a first water outlet, and a second water outlet. The water storage bag is connected to the filter element housing to divide the inner cavity of the filter element housing into a raw water cavity and a pure water cavity. The pre-filter element is disposed in the raw water cavity, and the post-filter element is disposed in the pure water cavity. The first water inlet and the first water outlet are both connected to the raw water cavity, and the second water inlet and the second water outlet are both connected to the pure water cavity.

[0005] As described above, the water storage composite filter element includes a post-filter material, a rear upper end cover, and a rear lower end cover. One end of the rear upper end cover is connected to the top wall of the post-filter material, and the other end is connected to the filter element housing. The rear lower end cover is placed on the lower end of the post-filter material. A flow guiding channel is provided in the middle of the post-filter material, and the second water outlet is connected to the flow guiding channel.

[0006] As described above, the water storage composite filter element includes a flow guide shell, which is connected to the filter element housing. The flow guide shell is located inside the raw water chamber, and the water storage bag is located inside the flow guide shell.

[0007] As described above, the water storage composite filter element includes a pre-filter material, a front upper cover, and a front lower cover. One end of the front upper cover is connected to the top wall of the pre-filter material, and the other end is connected to the filter element housing. The front lower cover is placed on the lower end of the pre-filter material, and the flow guide shell is connected to the front upper cover.

[0008] As described above, the water storage composite filter element has a water storage bag that is an elastic water bag.

[0009] In the water storage composite filter cartridge described above, both the water storage bag and the post-filter cartridge are located inside the pre-filter cartridge.

[0010] In the water storage composite filter cartridge described above, both the water storage bag and the post-filter cartridge are located above the pre-filter cartridge.

[0011] This utility model also provides a water purification device, including the water storage composite filter element as described above.

[0012] As described above, the water purification equipment further includes a raw water pipeline, a purified water pipeline, a pure water pipeline, a drinking water pipeline, a wastewater pipeline, and a membrane filter element. The membrane filter element includes a third inlet, a third outlet, and a wastewater outlet. The raw water pipeline is connected to the first inlet. One end of the purified water pipeline is connected to the first outlet, and the other end is connected to the third inlet. One end of the pure water pipeline is connected to the third outlet, and the other end is connected to the second inlet. The drinking water pipeline is connected to the second outlet, and the wastewater pipeline is connected to the wastewater outlet.

[0013] As described above, the water purification equipment includes a water purification pipe, a solenoid valve, and a booster pump. The solenoid valve and the booster pump are sequentially installed on the water purification pipe. One end of the water purification pipe is connected to the first outlet, and the other end is connected to the third inlet.

[0014] Implementing the embodiments of this utility model will have the following beneficial effects:

[0015] In this utility model, the water storage composite filter element includes a filter element shell, a pre-filter element, a post-filter element, and a water storage bag. The filter element shell is provided with a first water inlet, a second water inlet, a first water outlet, and a second water outlet. The water storage bag is connected to the filter element shell to divide the inner cavity of the filter element shell into a raw water cavity and a pure water cavity. The pre-filter element is located in the raw water cavity, and the post-filter element is located in the pure water cavity. The first water inlet and the first water outlet are both connected to the raw water cavity, and the second water inlet and the second water outlet are both connected to the pure water cavity. Raw water enters the raw water chamber of the water storage composite filter element through the first inlet. After being filtered by the pre-filter element, the purified water flows out of the water storage composite filter element through the first outlet. After the purified water flows out, it is further processed by the membrane filter element to obtain pure water. The pure water enters the pure water chamber of the water storage composite filter element through the second inlet. After being filtered again by the post-filter element, it flows out through the second outlet. The water storage bag can store pure water to rinse the membrane filter element and reduce the TDS of the concentrated water side of the membrane filter element. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a water storage composite filter element according to an exemplary embodiment;

[0018] Figure 2 This is a schematic diagram of a water purification device according to an exemplary embodiment;

[0019] Figure 3 This is a schematic diagram of the structure of a water storage composite filter element according to another exemplary embodiment.

[0020] The components are as follows: 1. Filter cartridge housing; 11. First inlet; 12. First outlet; 13. Second inlet; 14. Second outlet; 2. Pre-filter cartridge; 21. Pre-filter media; 22. Top cap of the pre-filter; 23. Bottom cap of the pre-filter; 3. Post-filter cartridge; 31. Post-filter media; 32. Top cap of the post-filter; 33. Bottom cap of the post-filter; 4. Water storage bag; 5. Flow guide shell; 100. Raw water pipeline; 101. Clean water pipeline; 1011. Clean water pipe; 1012. Solenoid valve; 1013. Booster pump; 102. Pure water pipeline; 103. Drinking water pipeline; 104. Wastewater pipeline; 105. Membrane filter cartridge; 1051. Third inlet; 1052. Third outlet; 1053. Wastewater outlet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0026] See Figure 1This utility model provides a water storage composite filter element, including a filter element housing 1, a pre-filter element 2, a post-filter element 3, and a water storage bag 4. The filter element housing 1 is provided with a first water inlet 11, a second water inlet 13, a first water outlet 12, and a second water outlet 14. The water storage bag 4 is connected to the filter element housing 1 to divide the inner cavity of the filter element housing 1 into a raw water cavity and a pure water cavity. The pre-filter element 2 is disposed in the raw water cavity, and the post-filter element 3 is disposed in the pure water cavity. The first water inlet 11 and the first water outlet 12 are both connected to the raw water cavity, and the second water inlet 13 and the second water outlet 14 are both connected to the pure water cavity. Raw water enters the raw water chamber of the composite filter element through the first inlet 11. After being filtered by the pre-filter element 2, the purified water flows out of the composite filter element through the first outlet 12. After the purified water flows out, it is further processed by the membrane filter element 105 to obtain pure water. The pure water enters the pure water chamber of the composite filter element through the second inlet 13. After being filtered again by the post-filter element 3, it flows out through the second outlet 14. The water storage bag 4 can store pure water to rinse the membrane filter element 105 and reduce the TDS of the concentrated water side of the membrane filter element 105.

[0027] Furthermore, the post-filter element 3 includes a post-filter material 31, a post-upper end cover 32, and a post-lower end cover 33. One end of the post-upper end cover 32 is connected to the top wall of the post-filter material 31, and the other end is connected to the filter element housing 1. The post-lower end cover 33 is placed on the lower end of the post-filter material 31. A flow guide channel is provided in the middle of the post-filter material 31, and the second water outlet 14 is connected to the flow guide channel.

[0028] Specifically, the post-filter media 31 includes activated carbon, ultrafiltration membranes, non-woven fabrics, and other filter media used for pure water post-treatment.

[0029] Furthermore, the water-storage composite filter element includes a flow guide shell 5, which is connected to the filter element housing 1. The flow guide shell 5 is located within the raw water cavity, and the water storage bag 4 is located within the flow guide shell 5. The flow guide shell 5 provides support for the water storage bag 4. When water enters the water storage bag 4, pure water enters the water storage bag 4 from the second inlet 13. The water storage bag 4 compresses the cavity between the flow guide shell 5 and the water storage bag 4, discharging the water therein, thus increasing the volume of pure water in the water storage bag 4. When the water storage bag 4 drains water, tap water enters the cavity between the flow guide shell 5 and the water storage bag 4, increasing the water volume in the cavity, squeezing the water storage bag 4, and discharging the pure water from the water storage bag 4.

[0030] Specifically, the water storage bag 4 has a water bag end cap at its open end, which is sealed to the filter element housing 1. The flow guide shell 5 is located on the outside of the water bag end cap to restrict the position of the water bag end cap.

[0031] Furthermore, the pre-filter element 2 includes a pre-filter material 21, a front upper cover 22, and a front lower cover 23. One end of the front upper cover 22 is connected to the top wall of the pre-filter material 21, and the other end is connected to the filter element housing 1. The front lower cover 23 is placed on the lower end of the pre-filter material 21, and the flow guide shell 5 is connected to the front upper cover 22.

[0032] Specifically, the pre-filter material 21 includes filter materials such as PP cotton, activated carbon, origami PP, and non-woven fabric used for pre-treatment in water purifiers. Its function is to pre-treat the raw water flowing to the membrane filter element 105.

[0033] Furthermore, the water storage bag 4 is an elastic water bag. The water storage bag 4 can be made of elastic materials such as rubber or silicone; if the water stored in the water storage bag 4 is not only used for rinsing the membrane filter element 105 but also for drinking, then it must be made of food-grade materials; the water storage bag 4 is located inside the flow guide shell 5, which can support the water storage bag 4 and limit its deformation and expansion. In some other embodiments, the water storage bag 4 can also be made of other inelastic polymer materials.

[0034] Furthermore, the water storage bag 4 and the post-filter element 3 are both located inside the pre-filter element 2. The upper end of the guide shell 5 is sealed to the front upper end cover 22, and the lower end of the guide shell 5 is sealed to the front lower end cover 23. The guide shell 5 has guide holes on its side wall. The pre-filter element 2 is located outside the guide shell 5. After the raw water enters the raw water chamber from the first inlet 11, it is treated by the pre-filter element 2 to obtain purified water. The purified water can enter the cavity between the guide shell 5 and the water storage bag 4 through the guide holes, and finally flow out from the first outlet 12.

[0035] In another embodiment, see Figure 3 The water storage composite filter element includes a filter element housing 1, a pre-filter element 2, a post-filter element 3, a flow guide shell 5, and a water storage bag 4. The filter element housing 1 is provided with a first water inlet 11, a second water inlet 13, a first water outlet 12, and a second water outlet 14. The water storage bag 4 is connected to the filter element housing 1 to divide the inner cavity of the filter element housing 1 into a raw water cavity and a pure water cavity. The pre-filter element 2 is located in the raw water cavity, and the post-filter element 3 is located in the pure water cavity. The first water inlet 11 and the first water outlet 12 are both connected to the raw water cavity, and the second water inlet 13 and the second water outlet 14 are both connected to the pure water cavity. The flow guide shell 5 is connected to the filter element housing 1 and is located in the raw water cavity. The water storage bag 4 is located inside the flow guide shell 5.

[0036] Furthermore, the pre-filter 2 includes a pre-filter media 21, a front upper cover 22, and a front lower cover 23. One end of the front upper cover 22 is connected to the top wall of the pre-filter media 21, and the other end is connected to the filter housing 1. The front lower cover 23 is placed on the lower end of the pre-filter media 21, and the flow guide shell 5 is connected to the front upper cover 22. In this embodiment, the water storage bag 4 and the post-filter 3 are both located above the pre-filter 2. The lower end of the flow guide shell 5 is sealed to the front upper cover 22, and the upper end of the flow guide shell 5 is sealed to the filter housing 1.

[0037] Specifically, the pre-filter 2 has a hollow structure, with a central channel formed in the middle. A water passage hole is provided in the middle of the upper front cover 22. A first channel is formed between the outer side wall of the guide shell 5 and the inner side wall of the filter housing 1. A second channel is formed between the inner side wall of the guide shell 5 and the outer side wall of the water storage bag 4. The first inlet 11, the first channel, the central channel of the pre-filter, the water passage hole, the second channel, and the first outlet 12 are connected in sequence. Raw water enters the water storage composite filter element through the first inlet 11, flows downward along the first channel, and after being treated by the pre-filter element 2 located below, the purified water flows upward through the central channel of the pre-filter element and passes through the water passage hole of the upper end cover 22 into the second channel, and then flows out of the water storage composite filter element through the first outlet 12; the pure water prepared by the membrane filter element enters the water storage composite filter element through the second inlet 13, is treated by the post-filter element 3 of the water storage composite filter element, and then flows out of the water storage composite filter element through the second outlet 14, which is connected to the drinking water outlet.

[0038] See Figure 2 This utility model also provides a water purification device, including a raw water pipeline 100, a purified water pipeline 101, a pure water pipeline 102, a drinking water pipeline 103, a wastewater pipeline 104, a membrane filter element 105, and a water storage composite filter element as described above. The membrane filter element 105 includes a third inlet 1051, a third outlet 1052, and a wastewater outlet 1053. The raw water pipeline 100 is connected to the first inlet 11. One end of the purified water pipeline 101 is connected to the first outlet 12, and the other end is connected to the third inlet 1051. One end of the pure water pipeline 102 is connected to the third outlet 1052, and the other end is connected to the second inlet 13. The drinking water pipeline 103 is connected to the second outlet 14, and the wastewater pipeline 104 is connected to the wastewater outlet 1053. After membrane filter 105 stops producing water, due to the depressurization of the concentrate side of membrane filter 105, the pure water side also begins to depressurize. The pure water in the water storage bag 4 will flow back to the pure water side of membrane filter 105. Under the action of the water bag and the raw water pressure, the pure water in the water bag begins to permeate through the membrane, flushing the concentrate side of membrane filter 105 and diluting the concentrate on the concentrate side, thereby reducing the TDS of the water on the concentrate side of membrane filter 105.

[0039] Furthermore, the water purification pipeline 101 includes a water purification pipe 1011, a solenoid valve 1012, and a booster pump 1013. The solenoid valve 1012 and the booster pump 1013 are sequentially arranged on the water purification pipe 1011. One end of the water purification pipe 1011 is connected to the first outlet 12, and the other end is connected to the third inlet 1051. The solenoid valve 1012 is used to open or close the water purification pipeline 101; the booster pump 1013 is used to increase the water pressure entering the membrane filter element 105, so that the membrane filter element 105 can produce water at its normal operating pressure, that is, at a pressure higher than the water pressure entering the water purification pipeline 101.

[0040] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit the scope of protection of the utility model.

Claims

1. A water-storage composite filter element, characterized in that, The filter includes a filter housing (1), a pre-filter (2), a post-filter (3), and a water storage bag (4). The filter housing (1) is provided with a first water inlet (11), a second water inlet (13), a first water outlet (12), and a second water outlet (14). The water storage bag (4) is connected to the filter housing (1) to divide the inner cavity of the filter housing (1) into a raw water cavity and a pure water cavity. The pre-filter (2) is located in the raw water cavity, and the post-filter (3) is located in the pure water cavity. The first water inlet (11) and the first water outlet (12) are both connected to the raw water cavity, and the second water inlet (13) and the second water outlet (14) are both connected to the pure water cavity.

2. The water-storage composite filter element according to claim 1, characterized in that, The post-filter element (3) includes a post-filter material (31), a post-upper end cover (32), and a post-lower end cover (33). One end of the post-upper end cover (32) is connected to the top wall of the post-filter material (31), and the other end is connected to the filter element housing (1). The post-lower end cover (33) is placed on the lower end of the post-filter material (31). A flow guide channel is provided in the middle of the post-filter material (31), and the second water outlet (14) is connected to the flow guide channel.

3. The water-storage composite filter element according to claim 2, characterized in that, The water storage composite filter element includes a flow guide shell (5), which is connected to the filter element housing (1). The flow guide shell (5) is located inside the raw water chamber, and the water storage bag (4) is located inside the flow guide shell (5).

4. The water-storage composite filter element according to claim 3, characterized in that, The pre-filter element (2) includes a pre-filter material (21), a front upper cover (22) and a front lower cover (23). One end of the front upper cover (22) is connected to the top wall of the pre-filter material (21), and the other end is connected to the filter element housing (1). The front lower cover (23) is placed on the lower end of the pre-filter material (21). The flow guide shell (5) is connected to the front upper cover (22).

5. The water-storage composite filter element according to claim 4, characterized in that, The water storage bag (4) is an elastic water bag.

6. The water storage composite filter element according to any one of claims 1-5, characterized in that, The water storage bag (4) and the post-filter (3) are both located inside the pre-filter (2).

7. The water storage composite filter element according to any one of claims 1-5, characterized in that, The water storage bag (4) and the post-filter (3) are both located above the pre-filter (2).

8. A water purification device, characterized in that, Includes the water storage composite filter element as described in any one of claims 1-7.

9. The water purification equipment according to claim 8, characterized in that, The water purification equipment also includes a raw water pipeline (100), a purified water pipeline (101), a pure water pipeline (102), a drinking water pipeline (103), a wastewater pipeline (104), and a membrane filter element (105). The membrane filter element (105) includes a third inlet (1051), a third outlet (1052), and a wastewater outlet (1053). The raw water pipeline (100) is connected to the first inlet (11). One end of the purified water pipeline (101) is connected to the first outlet (12), and the other end is connected to the third inlet (1051). One end of the pure water pipeline (102) is connected to the third outlet (1052), and the other end is connected to the second inlet (13). The drinking water pipeline (103) is connected to the second outlet (14), and the wastewater pipeline (104) is connected to the wastewater outlet (1053).

10. The water purification equipment according to claim 9, characterized in that, The water purification pipeline (101) includes a water purification pipe (1011), a solenoid valve (1012), and a booster pump (1013). The solenoid valve (1012) and the booster pump (1013) are sequentially arranged on the water purification pipe (1011). One end of the water purification pipe (1011) is connected to the first water outlet (12), and the other end is connected to the third water inlet (1051).

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