Membrane filtration assembly, filter element structure and purification device

Abstract

The utility model discloses a membrane filtration assembly, a filter element structure and a purification device. The membrane filtration assembly is used for the water purification device and comprises a filtration main body and a one-way valve, the filtering main body comprises a reverse osmosis membrane layer, and the one-way valve is arranged at the upstream of the reverse osmosis membrane layer and is used for connecting or disconnecting a water path at the upstream of the reverse osmosis membrane layer. According to the membrane filtration assembly provided by the utility model, the one-way valve is arranged, so that when a system stops working, water flow in a water path between the one-way valve and the water inlet of the filter element structure can be prevented from flowing to the raw water side of the reverse osmosis membrane layer, and the water quantity of the raw water side is greatly reduced; the pure water permeating from the pure water side to the raw water side is reduced, so that the TDS value of the'head cup water 'on the pure water side is reduced, and the problem that the TDS value of the'head cup water' is too high is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of purification equipment, in particular to a membrane filtration component, a filter element structure and a purification device. Background Art

[0002] With the popularization of reverse osmosis water purifiers, more and more people have paid attention to the problem of "the first cup of water". The main reason for this problem is the osmotic pressure difference.

[0003] When the reverse osmosis water purifier works normally, the booster pump works, applying a pressure greater than the osmotic pressure to the raw water side of the reverse osmosis membrane. The water on the raw water side of the reverse osmosis membrane permeates to the pure water side of the reverse osmosis membrane. When the reverse osmosis water purifier stops working, the booster pump also stops working synchronously. At the same time, the pressure on the raw water side is gradually released from the wastewater end, and the water on the pure water side of the reverse osmosis membrane permeates to the raw water side of the reverse osmosis membrane, resulting in a gradual increase in the concentration on the pure water side of the reverse osmosis membrane and an increase in the TDS value (i.e., total dissolved solids), that is, "the first cup of water" is produced. Summary of the Utility Model

[0004] The first object of the utility model is to provide a membrane filtration component, which aims to solve the technical problem of too high TDS value of "the first cup of water".

[0005] To achieve the above object, the solution provided by the utility model is: A membrane filtration component for a water purification device, comprising:

[0006] A filtration main body, the filtration main body comprising a reverse osmosis membrane layer;

[0007] A check valve, the check valve being arranged upstream of the reverse osmosis membrane layer for conducting or disconnecting the water path upstream of the reverse osmosis membrane layer.

[0008] As an implementation manner, the membrane filtration component further comprises a first end cover, the first end cover being connected to the filtration main body and enclosing a first flow channel with the filtration main body, the first flow channel being used for guiding water flow to the reverse osmosis membrane layer;

[0009] The check valve is arranged on the first end cover for conducting or disconnecting the first flow channel.

[0010] As an implementation manner, the first end cover is provided with a water inlet hole or the first end cover and the filtration main body enclose to form the water inlet hole, the water inlet hole communicating with the first flow channel for water flow to pass through and enter the first flow channel;

[0011] The check valve is arranged at the water inlet hole for opening or closing the water inlet hole.

[0012] As an implementation manner, the first end cover is provided with the water inlet hole;

[0013] The first end cap includes a cap body and a support portion. The cap body is provided with the water inlet hole. The support portion is connected to and supports between the cap body and the filter body, so that the cap body and the filter body are spaced apart to form the first flow channel.

[0014] As an implementation manner, the first end cap and the reverse osmosis membrane layer enclose at least part of the first flow channel.

[0015] As an implementation manner, the filter body further includes a central tube, and the reverse osmosis membrane layer is sleeved around the periphery of the central tube;

[0016] The first end cap, the reverse osmosis membrane layer and the central tube enclose the first flow channel.

[0017] As an implementation manner, the filter body further includes a post-filter element, and the post-filter element is used to filter the water flow that has passed through the reverse osmosis membrane layer.

[0018] The second object of the present utility model is to provide a filter element structure, including the above-mentioned membrane filtration assembly.

[0019] As an implementation manner, the filter element structure further includes a pre-filter element, and the pre-filter element is arranged along the axial direction of the membrane filtration assembly at one end of the membrane filtration assembly; and / or,

[0020] The filter element structure further includes a housing, the membrane filtration assembly is accommodated in the housing, and the housing is provided with at least three through holes.

[0021] The third object of the present utility model is to provide a purification device, including the above-mentioned filter element structure.

[0022] For the membrane filtration assembly, filter element structure and purification device provided by the present utility model, by arranging a one-way valve upstream of the reverse osmosis membrane layer, the one-way valve can conduct or disconnect the water path upstream of the reverse osmosis membrane layer, that is, can conduct or disconnect the water path on the raw water side of the reverse osmosis membrane layer; when the system stops working, the one-way valve disconnects the water path on the raw water side of the reverse osmosis membrane layer, preventing the water flow in the water path between the one-way valve and the water inlet of the filter element structure from flowing to the raw water side of the reverse osmosis membrane layer, greatly reducing the amount of water on the raw water side. In this way, when the ion balance is achieved between the raw water side and the pure water side, the pure water permeating from the pure water side to the raw water side is reduced, thereby reducing the TDS value of the "first glass of water" on the pure water side, and effectively improving the problem of too high TDS value of the "first glass of water". Description of the Drawings

[0023] 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 the description of the embodiments or the prior art. Obviously, the drawings in the following description 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.

[0024] Figure 1 It is a schematic structural view of a filter element structure provided by an embodiment of the present invention from one perspective;

[0025] Figure 2 is Figure 1 the bottom view of the filter element structure shown;

[0026] Figure 3 is Figure 2 the cross-sectional view along line A-A in ;

[0027] Figure 4 is Figure 3 the partial enlarged view at B in ;

[0028] Figure 5 It is a schematic structural view of the first end cap provided by an embodiment of the present invention;

[0029] Figure 6 It is the cross-sectional view of another filter element structure provided by an embodiment of the present invention;

[0030] Figure 7 is Figure 6 the partial enlarged view at C in ;

[0031] Figure 8 It is the cross-sectional view of yet another filter element structure provided by an embodiment of the present invention;

[0032] Figure 9 is Figure 8 the partial enlarged view at D in.

[0033] Explanation of the reference numerals in the drawings:

[0034] 100, filter element structure; 10, membrane filtration assembly; 11, filtration main body; 111, reverse osmosis membrane layer; 112, central tube; 1121, first cavity; 1122, second cavity; 12, check valve; 13, first end cap; 131, cap main body; 132, support portion; 14, first flow channel; 15, water inlet hole; 16, post-filter element; 161, first activated carbon layer; 20, outer shell; 21, through hole; 30, pre-filter element; 31, PP cotton layer; 32, second activated carbon layer.

[0035] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the drawings. Detailed implementation manners

[0036] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to 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 shall fall within the protection scope of the present utility model.

[0037] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] It should also be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0039] In addition, the descriptions involving "first", "second", etc. in the present utility model 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 of such features. In addition, the technical solutions between 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 is contradictory 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.

[0040] In the related art, after the reverse osmosis water purification device stops working, the water flow on the raw water side of the reverse osmosis membrane will carry ions (such as sodium, calcium, magnesium) and penetrate to the pure water side of the reverse osmosis membrane, increasing the TDS value of the pure water. When the reverse osmosis water purification device is started to take water again, the TDS value of the pure water produced in the early stage is on the high side, resulting in a high TDS value of the first glass of water, that is, the problem of "the first glass of water".

[0041] In view of this, the present utility model provides a membrane filtration component, a filter element structure and a purification device, which can effectively improve the problem of "the first glass of water". Among them, the purification device includes a filter element structure, and the filter element structure includes a membrane filtration component.

[0042] As Figure 3As shown in the figure, the membrane filtration module 10 provided by the embodiment of the present utility model is used for a purification device, and includes a filtration main body 11 and a check valve 12; the filtration main body 11 includes a reverse osmosis membrane layer 111 for performing reverse osmosis filtration on water flow; the check valve 12 is arranged upstream of the reverse osmosis membrane layer 111 for conducting or disconnecting the water path upstream of the reverse osmosis membrane layer 111.

[0043] By adopting the above technical solution, by arranging the check valve 12 upstream of the reverse osmosis membrane layer 111, the check valve 12 can conduct or disconnect the water path upstream of the reverse osmosis membrane layer 111, that is, it can conduct or disconnect the water path on the raw water side of the reverse osmosis membrane layer 111; when the system stops working, the check valve 12 disconnects the water path on the raw water side of the reverse osmosis membrane layer 111, preventing the water flow in the water path between the check valve 12 and the water inlet of the filter element structure 100 from flowing to the raw water side of the reverse osmosis membrane layer 111, greatly reducing the water volume on the raw water side. In this way, when the ion balance is achieved between the raw water side and the pure water side, the pure water permeating from the pure water side to the raw water side is reduced, thereby reducing the TDS value of the "first glass of water" on the pure water side, and effectively improving the problem of too high TDS value of the "first glass of water".

[0044] Wherein, the check valve 12 is set to be able to open under a pressure less than 0.05 MPa and greater than or equal to 0.015 MPa. Usually, the pressure of tap water is between 0.05 MPa and 0.2 MPa. Setting the opening pressure of the check valve 12 to be less than 0.05 MPa enables the tap water to open the check valve 12 when entering the flow channel; and setting the opening pressure of the check valve 12 to be greater than or equal to 0.015 MPa to avoid the check valve 12 being opened by too small a pressure and losing the effect of cutting off the water flow.

[0045] As an implementation manner, referring to Figure 3 and Figure 4 As shown in the figure, the membrane filtration module 10 further includes a first end cover 13. The first end cover 13 is connected to the filtration main body 11 and encloses a first flow channel 14 with the filtration main body 11. The first flow channel 14 is used to convey the water flow to the reverse osmosis membrane layer 111, that is, to convey the water flow to the raw water side of the reverse osmosis membrane layer 111. The check valve 12 is arranged on the first end cover 13 for conducting or disconnecting the first flow channel 14. In this way, when the system stops working, the check valve 12 disconnects the water path on the raw water side of the reverse osmosis membrane layer 111, and further greatly reduces the water volume on the raw water side.

[0046] As an implementation manner, referring to Figure 4 and Figure 5 As shown in the figure, the first end cover 13 is provided with a water inlet hole 15. The water inlet hole 15 communicates with the first flow channel 14 for allowing the water flow to pass through and enter the first flow channel 14. In this way, the water flow is enabled to flow into the first flow channel 14. Of course, in specific applications, as an alternative implementation, it is also possible that the first end cover 13 and the filtration main body 11 enclose to form the water inlet hole 15.

[0047] As an implementation manner, the one-way valve 12 is arranged at the water inlet hole 15 for opening or closing the water inlet hole 15. When the one-way valve 12 opens the water inlet hole 15, the first flow channel 14 is conducted, and water flow can be guided to the reverse osmosis membrane layer 111 through the first flow channel 14; when the one-way valve 12 closes the water inlet hole 15, the first flow channel 14 is disconnected. Combining with the water inlet hole 15 opened on the first end cover 13 facilitates the installation of the one-way valve 12, and the structural layout is reasonable and compact.

[0048] As an implementation manner, referring to Figures 3 to 5 As shown, the first end cover 13 includes a cover main body 131 and a support portion 132. The cover main body 131 is provided with a water inlet hole 15, and the support portion 132 is connected to and supports between the cover main body 131 and the filter main body 11, so that the cover main body 131 and the filter main body 11 are spaced apart to form the first flow channel 14. The support portion 132 can be set as a support bar, a support protrusion, a support column, etc., as long as it can space the cover main body 131 and the filter main body 11 apart and form the first flow channel 14 communicating with the water inlet hole 15 therebetween.

[0049] As an implementation manner, the first end cover 13 and the reverse osmosis membrane layer 111 enclose at least part of the first flow channel 14. In this way, it is realized that water flow can be guided to the reverse osmosis membrane layer 111 through the first flow channel 14.

[0050] As an implementation manner, referring to Figure 3 and Figure 4 As shown, the filter main body 11 further includes a central tube 112, the reverse osmosis membrane layer 111 is sleeved on the periphery of the central tube 112, and the first end cover 13, the reverse osmosis membrane layer 111 and the central tube 112 enclose the first flow channel 14. Both the reverse osmosis membrane layer 111 and the central tube 112 are tubular structures. The first end cover 13 is arranged at one axial end of the reverse osmosis membrane layer 111 and the central tube 112, and jointly encloses the first flow channel 14 with the reverse osmosis membrane layer 111 and the central tube 112. Among them, one end of the reverse osmosis membrane layer 111 facing the first end cover 13 is the raw water side, and the side facing the central tube 112 is the pure water side. It can be understood that in other embodiments, it is also possible that the first end cover 13 and the reverse osmosis membrane layer 111 enclose the first flow channel 14.

[0051] Referring to Figure 3 and Figure 4As shown, the central tube 112 has a first cavity 1121 and a second cavity 1122 that are axially isolated from each other. The second cavity 1122 is disposed between the first cavity 1121 and the first end cap 13. The pure water side of the reverse osmosis membrane layer 111 is in communication with the first cavity 1121, and the water flow on the pure water side can flow into the first cavity 1121. The raw water side of the reverse osmosis membrane layer 111 is in communication with the second cavity 1122, and the second cavity 1122 is disposed opposite to the water inlet hole 15 to form a partial first flow channel 14.

[0052] As an implementation manner, the filtration main body 11 further includes a post-filter element 16, and the post-filter element 16 is used to filter the water flow that has been filtered by the reverse osmosis membrane layer 111. Specifically, the post-filter element 16 is accommodated in the first cavity 1121. Of course, in specific applications, as an alternative implementation, it is also possible not to provide the post-filter element 16 in the filtration main body 11.

[0053] As an implementation manner, the post-filter element 16 includes a first activated carbon layer 161, and the first activated carbon layer can adsorb organic matters (such as residual chlorine, chloroform, carbon tetrachloride) and toxic substances in the water quality, effectively improving the water quality.

[0054] Further, referring to Figures 1 to 3 As shown, the embodiment of the present utility model further provides a filter element structure 100, including the above-mentioned membrane filtration assembly 10. By adopting the above-mentioned membrane filtration assembly 10, the problem of "first glass of water" can be effectively improved.

[0055] As an implementation manner, referring to Figure 2 and Figure 3 As shown, the filter element structure 100 further includes a housing 20, and the membrane filtration assembly 10 is accommodated in the housing 20. The housing 20 is provided with at least three through holes 21. The housing 20 at least plays a role in protecting the membrane filtration assembly 10, and a water flow channel can also be formed between the housing 20 and the membrane filtration assembly 10. In this embodiment, the housing 20 is provided with three through holes 21, which are respectively defined as a first water inlet, a first water outlet, and a second water outlet. The first water inlet is used for the water flow to enter the membrane filtration assembly 10, the first water outlet is used for discharging the wastewater generated after being filtered by the membrane filtration assembly 10, and the second water outlet is used for discharging the pure water generated after being filtered by the membrane filtration assembly 10.

[0056] As an implementation manner, referring to Figure 1 、 Figure 6 and Figure 8As shown, the filter element structure 100 further includes a pre-filter 30, and the pre-filter 30 is arranged along the axial direction of the membrane filtration module 10 at one end of the membrane filtration module 10. Arranging the pre-filter 30 and the reverse osmosis module axially can reduce the radial dimension of the filter element structure 100, which is beneficial to the horizontal arrangement of the filter element structure 100 in the purification device, making the layout of each component of the purification device more reasonable, and thus facilitating the miniaturization development of the purification device. Among them, the membrane filtration module 10 filters the water flow after being filtered by the pre-filter 30. In this way, the water flow can be filtered at least twice, greatly improving the water quality.

[0057] As an implementation manner, the pre-filter 30 includes a PP cotton layer 31 and a second activated carbon layer 32 arranged along the water flow direction. The PP cotton layer 31 can filter larger particle impurities such as sediment and rust in the water quality, and the second activated carbon layer can adsorb organic matters (such as residual chlorine, chloroform, carbon tetrachloride) and toxic substances in the water quality, effectively improving the water quality.

[0058] In one embodiment, referring to Figure 2 、 Figure 6 and Figure 7 As shown, the pre-filter 30 is arranged at the end of the reverse osmosis module where the first end cap 13 is provided. When adopting this implementation manner, the housing 20 can be provided with three through holes 21, which simplifies the water circuit design of the filter element structure 100 while ensuring at least two filtrations.

[0059] In another embodiment, referring to Figure 2 、 Figure 8 and Figure 9 As shown, the pre-filter 30 is arranged at the end of the reverse osmosis module where the first end cap 13 is not provided, that is to say, the pre-filter 30 is arranged at the end of the filter element body far from the first end cap 13. When adopting this implementation manner, the housing 20 can be provided with five through holes 21. Specifically, the five through holes 21 are respectively defined as a first water inlet, a second water inlet, a first water outlet, a second water outlet and a third water outlet. The first water inlet is used for the water flow to enter the membrane filtration module 10, the second water inlet is used for the water flow to enter the pre-filter 30, the first water outlet is used for discharging the waste water generated after being filtered by the membrane filtration module 10, the second water outlet is used for discharging the pure water generated after being filtered by the membrane filtration module 10, and the third water outlet is used for discharging the water flow generated after being filtered by the pre-filter 30, and the third water outlet is communicated with the first water inlet.

[0060] Furthermore, the embodiment of the present utility model further provides a purification device, including the above-mentioned filter element structure 100. Adopting the above-mentioned filter element structure 100 is beneficial to the miniaturization development of the purification device.

[0061] The above are only the preferred 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 inventive 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 membrane filtration component for a water purification device, characterized in that, Comprising: A filtration body, the filtration body including a reverse osmosis membrane layer; A check valve, the check valve being disposed upstream of the reverse osmosis membrane layer for conducting or disconnecting the water path upstream of the reverse osmosis membrane layer; The membrane filtration assembly further includes a first end cap, the first end cap being connected to the filtration body and enclosing a first flow channel with the filtration body, the first flow channel being used to guide water flow to the reverse osmosis membrane layer, and one end of the reverse osmosis membrane layer facing the first end cap being the raw water side; The check valve is disposed on the first end cap for conducting or disconnecting the first flow channel.

2. The membrane filtration component according to claim 1, characterized in that, The first end cap is provided with a water inlet hole or the first end cap and the filtration body enclose to form the water inlet hole, the water inlet hole communicating with the first flow channel for water flow to pass through and enter the first flow channel; The check valve is disposed at the water inlet hole for opening or closing the water inlet hole.

3. The membrane filtration component according to claim 2, characterized in that, The first end cap is provided with the water inlet hole; The first end cap includes a cap body and a support portion, the cap body being provided with the water inlet hole, the support portion being connected and supported between the cap body and the filtration body so that the cap body and the filtration body are spaced apart to form the first flow channel.

4. The membrane filtration component according to claim 1, characterized in that, The first end cap and the reverse osmosis membrane layer enclose at least part of the first flow channel.

5. The membrane filtration component according to claim 4, characterized in that, The filtration body further includes a central tube, and the reverse osmosis membrane layer is sleeved around the periphery of the central tube; The first end cap, the reverse osmosis membrane layer and the central tube enclose to form the first flow channel.

6. The membrane filtration component according to claim 1, characterized in that, The filtration body further includes a post-filter element for filtering the water flow filtered by the reverse osmosis membrane layer.

7. A filter element structure, characterized in that, Comprising the membrane filtration assembly according to any one of claims 1 to 6.

8. The filter element structure according to claim 7, characterized in that, The filter element structure further includes a pre-filter element, the pre-filter element being axially disposed at one end of the membrane filtration assembly along the axial direction of the membrane filtration assembly; and / or, The filter element structure further includes a housing, the membrane filtration assembly being accommodated in the housing, and the housing being provided with at least three through holes.

9. A purification device, characterized in that, Comprising the filter element structure according to claim 7 or 8.

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