EDI filter element structure and water purifier

Abstract

The utility model discloses an EDI (Electronic Data Interchange) filter element structure and a water purifier, and the EDI filter element structure comprises a shell and a filter element main body, the shell is provided with a water inlet and a water outlet; the filter element main body is arranged in the shell, is communicated with the water inlet and the water outlet, and is used for filtering flowing water flow; wherein at least one water inlet is arranged, and at least one water inlet corresponds to the upper end of the filter element main body. According to the EDI filter element structure provided by the embodiment of the utility model, gas gathered at the top of the filter element can be discharged, so that the situation that the filtering area of the filter element is reduced due to gas gathering is avoided, and the flux of the filter element and the flow of the whole machine are effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to an EDI filter element structure and a water purifier. Background Art

[0002] Continuous Electrodeionization (EDI) is a new membrane separation technology formed by the organic combination of EDI and ion exchange. It uses high voltage at both ends of the electrodes to move charged ions in the water, and cooperates with ion exchange resins and selective resin membranes to accelerate the movement and removal of ions, which is used to produce ultrapure water. However, when the EDI filter element is making water and regenerating (backwashing), gas will be generated. The gas rises to the top of the filter element and is difficult to discharge. Due to the accumulation of gas, the part of the filter element with gas accumulated on the top of the filter element cannot be filtered, and the filter area of ​​the filter element is reduced, which in turn reduces the filter element flux and the flow rate of the whole machine. Utility Model Content

[0003] The first purpose of the utility model is to provide an EDI filter element structure, which aims to solve the technical problem of reducing the filter element flux due to gas accumulation on the top of the filter element.

[0004] In order to achieve the above object, the utility model provides a solution: an EDI filter element structure, comprising:

[0005] A housing, wherein the housing is provided with a water inlet and a water outlet;

[0006] A filter element body, the filter element body is disposed in the housing and communicates with the water inlet and the water outlet, and the filter element body is used to filter the water flowing through the housing;

[0007] There is at least one water inlet, and at least one of the water inlets corresponds to the upper end of the filter element body.

[0008] As an implementation manner, at least two water inlets are provided, at least one of the water inlets corresponds to the upper end of the filter element body, and at least one of the water inlets corresponds to the lower end of the filter element body.

[0009] As an embodiment, at least three water inlets are provided, at least two of which correspond to the upper end of the filter element body and are arranged at intervals along the circumference of the shell, and at least one of which corresponds to the lower end of the filter element body.

[0010] As an embodiment, the housing includes a housing body, a second cover body and a first cover body, wherein the second cover body is connected to the upper end of the housing body, and the first cover body is connected to the lower end of the housing body;

[0011] The water inlet is opened on the shell body, and the water outlet is opened on the first cover body.

[0012] As an embodiment, the filter element body includes a membrane assembly, a first electrode and a second electrode;

[0013] The membrane assembly has a first cavity, the membrane assembly and the shell body or the shell body and the first cover body are enclosed to form a second cavity, the second cavity is arranged around the circumference of the first cavity, the water outlet is connected to the first cavity, and the water inlet is connected to the second cavity;

[0014] The first electrode is disposed in the first cavity, and the second electrode is disposed in the second cavity.

[0015] As an embodiment, the membrane assembly includes an ion filtration membrane, a first connecting member and a second connecting member.

[0016] The ion filter membrane and the first connecting member are both hollow tubular structures, the first connecting member is connected between the lower end of the ion filter membrane and the first cover body, and the second connecting member is sealed on the upper end of the ion filter membrane and circumferentially connected to the shell body;

[0017] The inner cavity of the ion filtering membrane and the first connecting member forms the first cavity, and the first connecting member, the ion filtering membrane, the second connecting member, the shell body and the first cover body together form the second cavity.

[0018] As an embodiment, the EDI filter element structure further includes a first seal and a second seal;

[0019] The first sealing member is disposed between the first connecting member and the first cover body, and the second sealing member is disposed between the second connecting member and the shell body.

[0020] As an embodiment, the filter element body further includes a support tube, the support tube is disposed in the first cavity, and the inner cavity of the support tube communicates with the first cavity and the water outlet, and the first electrode is fixedly disposed on the outer side of the support tube; and / or,

[0021] The second electrode is fixedly arranged on the inner side of the shell body.

[0022] As an embodiment, the EDI filter element structure further comprises an elastic extrusion member, wherein the elastic extrusion member is arranged between the housing and the filter element body; and / or,

[0023] The EDI filter element structure is cylindrical.

[0024] The second object of the present utility model is to provide a water purifier, comprising the above-mentioned EDI filter element structure.

[0025] The EDI filter element structure and water purifier provided by the utility model can filter the water flowing through by setting the filter element body; by setting the water inlet and the water outlet, and the filter element body is connected to the water inlet and the water outlet, when the water production mode is executed, the water flow can flow into the housing from the water inlet, and the pure water produced after being filtered by the filter element body can flow out of the housing from the water outlet; when the EDI filter element regeneration mode is executed, the water flow can flow into the housing from the water outlet, and the waste water produced after passing through the filter element body can flow out of the housing from the water inlet; by setting at least one water inlet corresponding to the upper end of the filter element body, when gas is gathered at the top of the EDI filter element, the gas corresponds to the water inlet, and when the EDI filter element regeneration mode is executed, the gas can be discharged from the housing from the water inlet along with the waste water. Therefore, the EDI filter element structure provided by the embodiment of the utility model can discharge the gas gathered at the top of the filter element, thereby avoiding the situation that the filter area of ​​the filter element is reduced due to gas accumulation, thereby effectively ensuring the flux of the filter element and the flow rate of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of an EDI filter element structure provided by an embodiment of the utility model from one perspective;

[0028] Figure 2 It is a top view of the EDI filter element structure provided by an embodiment of the utility model;

[0029] Figure 3 yes Figure 2 Sectional view along line AA;

[0030] Figure 4 It is a schematic diagram of the assembly structure of the EDI filter element structure and the water pipe provided in the embodiment of the utility model;

[0031] Figure 5 It is a schematic diagram of the assembly structure of the membrane assembly, the first sealing member and the second sealing member provided in an embodiment of the utility model;

[0032] Figure 6 It is a schematic diagram of the assembly structure of the support tube and the first electrode provided in an embodiment of the utility model.

[0033] Description of Figure Numbers:

[0034] 100, EDI filter element structure; 10, outer shell; 11, water inlet; 12, water outlet; 13, shell body; 14, first cover body; 15, second cover body; 20, filter element body; 21, membrane assembly; 211, first cavity; 212, ion filter membrane; 213, first connecting piece; 214, second connecting piece; 22, first electrode; 23, second electrode; 24, support tube; 30, second cavity; 41, first sealing piece; 42, second sealing piece; 50, elastic extrusion piece; 200, water conduit.

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

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

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

[0039] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model. It should be noted that the upper and lower in this application refers to the corresponding upper or lower part when the water purifier is in working condition.

[0040] Continuous Electrodeionization (EDI) technology is an electrode ionization technology used in water treatment. It removes ions and impurities in water through electric fields and ion-selective membranes. Due to design limitations, EDI filter elements will generate gas during water production and regeneration (backwashing). The gas rises to the top of the filter element and is difficult to discharge. Due to the accumulation of gas, the part of the filter element with gas accumulated on the top of the filter element cannot be filtered, and the filter element filtration area is reduced, which in turn reduces the filter element flux and the overall flow rate.

[0041] In view of this, the utility model provides an EDI filter element structure, which can discharge the gas gathered at the top and avoid the reduction of the filtering area.

[0042] like Figures 1 to 3 As shown, an embodiment of the utility model provides an EDI filter element structure 100, including a shell 10 and a filter element body 20; the shell 10 is provided with a water inlet 11 and a water outlet 12, the filter element body 20 is arranged in the shell 10 and connects the water inlet 11 and the water outlet 12, and the filter element body 20 is used to filter the water flowing through; wherein, at least one water inlet 11 is provided, and at least one water inlet 11 corresponds to the upper end of the filter element body 20.

[0043] By adopting the above technical scheme, the water flowing through can be filtered by setting the filter element main body 20; by setting the water inlet 11 and the water outlet 12, and the filter element main body 20 is connected to the water inlet 11 and the water outlet 12, when executing the water making (pure water making) mode, the water flow can flow into the outer shell 10 from the water inlet 11, and after being filtered by the filter element main body 20, the generated pure water can flow out of the outer shell 10 from the water outlet 12; when executing the EDI filter element regeneration (backwashing the EDI filter element) mode, the water flow can flow into the outer shell 10 from the water outlet 12, and after passing through the filter element main body 20, the generated waste water can flow out of the outer shell 10 from the water inlet 11; by setting at least one water inlet 11 corresponding to the upper end of the filter element main body 20, when gas gathers on the top of the EDI filter element, the gas corresponds to the water inlet 11, and when the EDI filter element regeneration mode is executed, the gas can be discharged from the outer shell 10 from the water inlet 11 along with the waste water. Therefore, the EDI filter element structure 100 provided in the embodiment of the utility model can discharge the gas accumulated on the top of the filter element, thereby avoiding the reduction of the filter area of ​​the filter element due to gas accumulation, thereby effectively ensuring the flux of the filter element and the flow rate of the entire machine.

[0044] As an embodiment, at least two water inlets 11 are provided, at least one water inlet 11 corresponds to the upper end of the filter element body 20, and at least one water inlet 11 corresponds to the lower end of the filter element body 20. In the related art, the water inlet 11 is provided only at the lower end of the corresponding filter element body 20, and the water flow is basically filtered from the lower end of the filter element body 20. After a period of use, the surface of the lower end of the filter element body 20 is blocked by the filtered ions (impurities), thereby reducing the filtration area of ​​the filter element body 20. By providing at least one water inlet 11 at both the upper and lower ends of the filter element body 20, when the water making mode is executed, the water flow flows from the upper and lower ends to the filter element body 20. Therefore, the upper and lower ends of the filter element body 20 filter the water flow, reducing the filtration amount at one end, and avoiding the blockage caused by the large filtration amount at one end.

[0045] As an embodiment, at least three water inlets 11 are provided, at least two of which correspond to the upper end of the filter element body 20 and are arranged at intervals along the circumference of the housing 10, and at least one of which corresponds to the lower end of the filter element body 20. In this way, at least two water inlets 11 are provided along the circumference of the filter element body 20, which, on the one hand, increases the amount of gas discharged, and on the other hand, the water flow entering the filter element body 20 from the upper end of the filter element body 20 is more evenly distributed around the filter element body 20.

[0046] Reference Figure 3 and Figure 4 As shown, in this embodiment, two water inlets 11 and one water outlet 12 are provided, the two water inlets 11 correspond to the upper end and the lower end of the filter element body 20 respectively, and the water outlet 12 is provided at the lower end of the filter element body 20. Specifically, the two water inlets 11 are connected to the same water conduit 200.

[0047] As an implementation method, refer to Figure 1 and Figure 3 As shown, the housing 10 includes a housing body 13, a first cover body 14 and a second cover body 15, wherein the first cover body 14 is connected to the lower end of the housing body 13, and the second cover body 15 is connected to the upper end of the housing body 13; the water inlet 11 is provided in the housing body 13, and the water outlet 12 is provided in the first cover body 14. Of course, in a specific application, as an alternative implementation scheme, the water inlet 11 may also be provided in the second cover body 15, or the water outlet 12 may also be provided in the lower end of the housing body 13.

[0048] As an embodiment, the first cover 14 and the shell body 13 are integrally formed. In this way, on the one hand, the assembly speed of the shell 10 is accelerated, and on the other hand, the connection sealing between the first cover 14 and the shell body 13 is ensured to prevent water leakage due to installation error when the two are assembled.

[0049] As an implementation method, refer to Figure 3As shown, the filter element body 20 includes a membrane assembly 21, a first electrode 22, and a second electrode 23; the membrane assembly 21 has a first cavity 211, and the membrane assembly 21 and the shell body 13 or the shell body 13 and the first cover 14 are enclosed to form a second cavity 30, and the second cavity 30 is arranged around the circumference of the first cavity 211, and the water outlet 12 is connected to the first cavity 211, and the water inlet 11 is connected to the second cavity 30; the first electrode 22 is arranged in the first cavity 211, and the second electrode 23 is arranged in the second cavity 30. Among them, the positive and negative poles of the first electrode 22 and the second electrode 23 are adjustable. In specific applications, in the water production mode and the regeneration mode of the EDI filter element structure 100, the polarity of the first electrode 22 and the polarity of the second electrode 23 need to be changed. That is, in one mode, the first electrode 22 is positive and the second electrode 23 is negative, and in another mode, the first electrode 22 is negative and the second electrode 23 is positive.

[0050] As an implementation method, refer to Figure 3 and Figure 5 As shown, the membrane assembly 21 includes an ion filter membrane 212, a first connector 213 and a second connector 214. The ion filter membrane 212 and the first connector 213 are both hollow tubular structures. The first connector 213 is connected between the lower end of the ion filter membrane 212 and the first cover 14. The second connector 214 is sealed on the upper end of the ion filter membrane 212 and is circumferentially connected to the shell body 13. The inner cavity of the ion filter membrane 212 and the first connector 213 forms a first cavity 211. The first connector 213, the ion filter membrane 212, the second connector 214, the shell body 13 and the first cover 14 enclose a second cavity 30. The first connector 213 and the ion filter membrane 212 are coaxially arranged, and the inner diameter of at least part of the inner cavity of the first connector 213 is larger than the inner diameter of the inner cavity of the ion filter membrane 212.

[0051] As an implementation method, refer to Figure 2 , Figure 3 and Figure 5 As shown, the EDI filter element structure 100 further includes a first seal 41 and a second seal 42; the first seal 41 is disposed between the first connector 213 and the first cover 14, and the second seal 42 is disposed between the second connector 214 and the shell body 13. By providing the first seal 41 and the second seal 42, the first cavity 211 and the second cavity 30 are completely sealed, effectively improving the sealing performance of the first cavity 211 and the second cavity 30, thereby preventing water leakage of the first cavity 211 and the second cavity 30. Among them, the first seal 41 and the second seal 42 are both sealing rings.

[0052] As an implementation method, refer to Figure 3 and Figure 6As shown, the filter element body 20 also includes a support tube 24, which is arranged in the first cavity 211, and the inner cavity of the support tube 24 is connected to the first cavity 211 and the water outlet 12, and the first electrode 22 is fixed on the outer side of the support tube 24; in this way, on the one hand, the first electrode 22 can be fixed, and on the other hand, the filtered pure water can flow out of the first cavity 211.

[0053] When the water production mode is executed, water flows from the water inlet 11 into the second cavity 30, and under the action of the electric field, it is filtered by the ion filter membrane 212 and enters the first cavity 211, and then enters the inner cavity of the support tube 24 and flows out through the water outlet 12. Gas is gathered at the upper ends of the first cavity 211 and the second cavity 30.

[0054] When the EDI filter element regeneration mode is executed, water flows from the water outlet 12 into the inner cavity of the support tube 24, then into the first cavity 211, and under the action of the electric field, passes through the ion filter membrane 212 into the second cavity 30, and then is discharged from the water inlet 11. Among them, the gas at the upper end of the first cavity 211 passes through the ion filter membrane 212 into the second cavity 30, and the gas connected to the upper end of the second cavity 30 is discharged from the water inlet 11 together with the water flow.

[0055] As an implementation mode, the second electrode 23 is fixedly disposed on the inner side of the shell body 13. In a specific application, the second electrode 23 is embedded on the inner side of the shell body 13.

[0056] As an implementation method, refer to Figure 2 and Figure 3 As shown, the EDI filter element structure 100 further includes an elastic extrusion member 50, which is disposed between the housing 10 and the filter element body 20. Specifically, the elastic extrusion member 50 is disposed between the second cover 15 and the second connecting member 214. When the EDI filter element structure 100 is assembled, there is a gap between the second cover 15 and the second connecting member 214, which allows the membrane assembly 21 to have a moving space, thereby increasing the possibility of water leakage. By arranging the elastic extrusion member 50 between the second cover 15 and the second connecting member 214, the membrane assembly 21 is prevented from moving, thereby reducing the probability of water leakage.

[0057] As an embodiment, the EDI filter element structure 100 is cylindrical. Among them, the shell body 13, the first electrode 22, the second electrode 23, the ion filter membrane 212 and the support tube 24 are all tubular structures with circular cross-sections. In particular, setting the first electrode 22 and the second electrode 23 as a tubular structure with a circular cross-section helps to improve the uniformity of the electric field.

[0058] Furthermore, the embodiment of the utility model also provides a water purifier, comprising the above-mentioned EDI filter element structure 100. By adopting the above-mentioned EDI filter element structure 100, the flux of the filter element and the flow rate of the whole machine are effectively ensured.

[0059] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An EDI filter element structure, characterized in that: include: A housing, wherein the housing is provided with a water inlet and a water outlet; A filter element body, the filter element body is disposed in the housing and communicates with the water inlet and the water outlet, and the filter element body is used to filter the water flowing through the housing; There is at least one water inlet, and at least one of the water inlets corresponds to the upper end of the filter element body.

2. The EDI filter element structure according to claim 1, characterized in that: There are at least two water inlets, at least one of which corresponds to the upper end of the filter element body, and at least one of which corresponds to the lower end of the filter element body.

3. The EDI filter element structure according to claim 2, characterized in that: There are at least three water inlets, at least two of which correspond to the upper end of the filter element body and are spaced apart along the circumference of the shell, and at least one of which corresponds to the lower end of the filter element body.

4. The EDI filter element structure according to any one of claims 1 to 3, characterized in that: The housing comprises a housing body, a second cover body and a first cover body, wherein the second cover body is connected to the upper end of the housing body, and the first cover body is connected to the lower end of the housing body; The water inlet is opened on the shell body, and the water outlet is opened on the first cover body.

5. The EDI filter element structure according to claim 4, characterized in that: The filter element body includes a membrane assembly, a first electrode and a second electrode; The membrane assembly has a first cavity, the membrane assembly and the shell body or the shell body and the first cover body are enclosed to form a second cavity, the second cavity is arranged around the circumference of the first cavity, the water outlet is connected to the first cavity, and the water inlet is connected to the second cavity; The first electrode is disposed in the first cavity, and the second electrode is disposed in the second cavity.

6. The EDI filter element structure according to claim 5, characterized in that: The membrane assembly comprises an ion filtration membrane, a first connecting member and a second connecting member, The ion filter membrane and the first connecting member are both hollow tubular structures, the first connecting member is connected between the lower end of the ion filter membrane and the first cover body, and the second connecting member is sealed on the upper end of the ion filter membrane and circumferentially connected to the shell body; The inner cavity of the ion filtering membrane and the first connecting member forms the first cavity, and the first connecting member, the ion filtering membrane, the second connecting member, the shell body and the first cover body together form the second cavity.

7. The EDI filter element structure according to claim 6, characterized in that: The EDI filter element structure also includes a first seal and a second seal; The first sealing member is disposed between the first connecting member and the first cover body, and the second sealing member is disposed between the second connecting member and the shell body.

8. The EDI filter element structure according to claim 5, characterized in that: The filter element body further includes a support tube, the support tube is disposed in the first cavity, and the inner cavity of the support tube communicates with the first cavity and the water outlet, and the first electrode is fixedly disposed on the outer side of the support tube; and / or, The second electrode is fixedly arranged on the inner side of the shell body.

9. The EDI filter element structure according to any one of claims 1 to 3, characterized in that: The EDI filter element structure further comprises an elastic extrusion member, wherein the elastic extrusion member is arranged between the housing and the filter element body; and / or, The EDI filter element structure is cylindrical.

10. A water purifier, characterized in that: It comprises the EDI filter element structure as described in any one of claims 1 to 9.

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