Filter unit, filter element and filter

Abstract

According to the filtering unit, the independent sealing structure and the independent flow guide structure are arranged on the second flow guide block, so that material liquid is effectively guided, and the overall sealing performance of the filtering unit is ensured. According to the filter element, overall sealing is achieved through cooperation of an inner side fixing part, an outer side fixing part, a second extending part of a second flow guide block, a first extending part of a first flow guide block, an upper panel and a lower panel, and it is guaranteed that stress inside and outside a filter unit is stable; a second extension piece of the second flow guide block and a first extension piece of the first flow guide block can also position the second flow guide block and the first flow guide block, so that the consistency of the liquid inlet and the liquid outlet is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of biological pharmaceutical process technology, specifically relates to a filter unit, filter core and filter. BACKGROUND

[0002] The filter is an important equipment in the field of biological pharmaceutical process technology, and is used for removing impurities in the feed liquid in the biological pharmaceutical process. According to different application scenarios, the filter has different types, and the capsule type deep filter is one of the types. In the prior art, the capsule type deep filter generally comprises a capsule type shell and a filter core arranged in the shell, the filter core comprises an upper panel, a lower panel and a filter unit, the filter unit comprises four filter paper boards, two middle pad blocks and two middle flow guide blocks. The upper and lower surfaces of the middle pad block are respectively provided with a paper board, forming a filter assembly, the upper and lower surfaces of a middle flow guide block are respectively provided with a filter assembly, and different filter units are separated by another middle flow guide block, so that a plurality of filter units are connected in parallel. In order to improve the filtering efficiency, the filter unit needs to be sealed as a whole, please refer to Figure 1 , the prior art sets a threaded rod in the center of the filter unit, and realizes the overall sealing by screwing and pressing the upper panel and the lower panel. By using this method, the following problems exist:

[0003] (1) The filter unit is subjected to force in the middle, and there is no stable force on the outside, so that the edge of the filter unit may be turned up or cannot be completely pressed, liquid mixing is easy to occur, and the utilization rate of the paper board will decrease.

[0004] (2) The screw knob locking has no positioning function, so that it is impossible to accurately determine whether the position of the filter unit meets the sealing condition, and different batches of products have large differences.

[0005] (3) The assembly of the middle flow guide block lacks positioning, so that it is impossible to accurately determine whether the inlet and outlet ports are consistent, and it is difficult to ensure the consistency of the products.

[0006] Please refer to Figure 2 , the prior art realizes the overall sealing by the internal connecting block and the peripheral connecting block, and the internal and external parts are subjected to force, so that the problems of the edge of the filter unit being turned up or being unable to be pressed can be solved. Specifically, the upper panel and the lower panel are pressed, the internal and peripheral connecting blocks are connected and rotated by 90 degrees, the bosses extended from the two sides are pressed, and the overall sealing is realized. However, this method still has the following problems:

[0007] (1) The structure of the peripheral connecting block is attached to the inner side of the product, the overall assembly is inconvenient to observe whether it is clamped in place, and too much pressing will cause the peripheral connecting block to be twisted and broken.

[0008] (2) the inner connecting block is simple to install, and the two edge hanging tables can be compressed and sealed by rotating 90°, but the two ends of the middle part are distributed in the inner ring, and the other two ends are in a hollow state, the hollow end of the liquid outlet will be unevenly stressed, and the sealing effect will be lost to different degrees.

[0009] (3) refer to Figure 3 The sealing edge of the existing middle flow guide block overlaps with the liquid inlet flow channel. The liquid inlet flow channel needs to be sealed through the interval of the sealing edge, thereby causing the local area of the paperboard to be invalid, and when thick paperboard is used, the flow channel can be blocked. SUMMARY

[0010] In order to overcome the defects of the prior art, one object of the present application is to provide a filter unit, another object of the present application is to provide a filter element, and still another object of the present application is to provide a filter. In order to achieve the above objects, the technical scheme adopted by the present application is as follows:

[0011] One aspect of the present application provides a filter unit, comprising a first flow guide block, a second flow guide block, a filter paperboard and an intermediate pad, wherein the second flow guide block is annular, comprising a sealing structure, a flow guide structure and a liquid discharge port, the sealing structure is arranged in the inner ring of the second flow guide block, the flow guide structure is a groove arranged along the radial direction of the second flow guide block, and the liquid discharge port is arranged on the inner side of the second flow guide block, and one end of the groove is in communication with the liquid discharge port.

[0012] Optionally, the filter paperboard comprises a first filter paperboard and a second filter paperboard, the first flow guide block is provided with the intermediate pad on both sides, the intermediate pad is provided with the first filter paperboard and the second filter paperboard on both sides, and the first filter paperboard is arranged between the first flow guide block and the intermediate pad.

[0013] Optionally, the first flow guide block is provided with a liquid inlet, the feed liquid enters the filter unit from the liquid inlet, and after being filtered by the first filter paperboard and the second filter paperboard on both sides of the first flow guide block, the feed liquid enters the second flow guide block.

[0014] Optionally, the outer side of the first flow guide block is provided with a first extension piece.

[0015] Optionally, the outer side of the second flow guide block is provided with a second extension piece.

[0016] Another aspect of the present application provides a filter element, the filter element comprising an upper panel, a lower panel and at least one filter unit as described above.

[0017] Optionally, the filter element includes a fixing component, with a first buckle on the outer side of the upper panel and a second buckle on the outer side of the lower panel. The fixing component includes an outer fixing member, which cooperates with the first extension member, the second extension member, the first buckle, and the second buckle to seal the upper panel, the lower panel, and the filter unit as a whole.

[0018] Optionally, the inner side of the upper panel is provided with a third buckle, the inner side of the lower panel is provided with a fourth buckle, and the fixing component includes an inner fixing member. The inner fixing member cooperates with the third buckle and the fourth buckle to seal the upper panel, the lower panel and the filter unit as a whole.

[0019] Optionally, the two ends of the outer fixing member include a first snap-fit ​​member for engaging with the first buckle and the second buckle, and the two ends of the inner fixing member include a second snap-fit ​​member for engaging with the third buckle and the fourth buckle.

[0020] Another aspect of this utility model provides a filter, including a housing and a filter element as described above. The housing includes an inlet and an outlet, and the filter element is disposed inside the housing. Liquid enters the filter from the inlet, is filtered by the filter element, and is discharged from the outlet.

[0021] The filter unit of this invention effectively guides the liquid flow and ensures the overall sealing of the filter unit by setting an independent sealing and guiding structure in the second guide block. The filter element of this invention achieves overall sealing through the cooperation of the inner and outer fixing parts, the second extension of the second guide block, the first extension of the first guide block, the upper panel, and the lower panel, ensuring stable internal and external forces on the filter unit. Furthermore, the second extension of the second guide block and the first extension of the first guide block can also position the second guide block and the intermediate liquid inlet block, ensuring consistency between the inlet and outlet. The filter of this invention is simple to install, has high filtration efficiency, and has high practical value. Attached Figure Description

[0022] After reading the detailed embodiments of this utility model with reference to the accompanying drawings, the reader will gain a clearer understanding of all aspects of this utility model. Among them,

[0023] Figure 1 Diagram 1 shows the structure of an existing filter unit.

[0024] Figure 2 Diagram 2 shows the structure of an existing filter unit.

[0025] Figure 3 Here is a structural diagram of the existing guide block;

[0026] Figure 4 This is a structural diagram of a filter unit according to an embodiment of the present invention;

[0027] Figure 5 This is a structural diagram of the second flow guide block according to an embodiment of the present invention;

[0028] Figure 6 This is a structural diagram of the first guide block according to an embodiment of the present invention;

[0029] Figure 7 This is a structural diagram of the intermediate pad block according to one embodiment of the present invention;

[0030] Figure 8 This is a structural diagram of the upper panel of one embodiment of the present invention;

[0031] Figure 9 This is a structural diagram of a fixing component according to an embodiment of the present invention;

[0032] Figure 10 This is a structural diagram of a filter element according to an embodiment of the present invention;

[0033] Explanation of reference numerals in the attached figures:

[0034] 1: Filter unit; 2: Top panel; 3: Bottom panel; 4: Fixing components;

[0035] 11: First guide block; 12: Second guide block; 13: Intermediate pad; 14: First filter paper; 15: Second filter paper;

[0036] 111: First extension component; 112: Liquid inlet;

[0037] 121: Sealing structure; 122: Flow guiding structure; 123: Drain port; 124: Second extension;

[0038] 21: First buckle; 22: Third buckle;

[0039] 31: Second buckle;

[0040] 41: Outer fastener; 42: Inner fastener;

[0041] 411: First card connector;

[0042] 421: Second card connector. Detailed Implementation

[0043] To make the technical content disclosed in this application more detailed and complete, reference can be made to the accompanying drawings and the following specific embodiments of this utility model. However, those skilled in the art should understand that the embodiments provided below are not intended to limit the scope of this utility model. Furthermore, the drawings are for illustrative purposes only and are not drawn to their original dimensions.

[0044] The term "connection" in this specification includes both direct and indirect connections. The terms "several" and "more than" refer to two or more entities. The terms "first," "second," and "third" in the specification, claims, and accompanying drawings also apply.

[0045] The use of terms such as "fourth" (if present) is to distinguish similar objects and is not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] The technical solution of this utility model will be described in detail below. The following embodiments can be combined with each other. The same or similar concepts or processes may not be described again in some embodiments.

[0047] Example 1:

[0048] This embodiment provides a filter unit 1 for a depth filter. Please refer to [link / reference]. Figures 4-8 The filter unit 1 includes a first guide block 11, a second guide block 12, a filter paperboard and an intermediate pad block 13. The filter paperboard includes a first filter paperboard 14 and a second filter paperboard 15, wherein the filtration accuracy of the second filter paperboard 15 is higher than that of the first filter paperboard 14.

[0049] Please see Figure 4 In this embodiment, intermediate pads 13 are respectively provided on both sides of the first guide block 11, and first filter paperboard 14 and second filter paperboard 15 are respectively provided on both sides of the intermediate pads 13. The first filter paperboard 14 is disposed between the first guide block 11 and the intermediate pads 13. Specifically, the filtration unit 1 includes two first filter paperboards 14, two second filter paperboards 15, two intermediate pads 13, one first guide block 11, and one second guide block 12. The liquid enters the filtration unit 1 from the first guide block 11, is filtered by the filter paperboard, and is discharged from the filtration unit 1 from the second guide block 12.

[0050] In this embodiment, the first filter paperboard 14, the intermediate pad 13, and the second filter paperboard 15 are sequentially arranged on both sides of the first guide block 11, and the second guide block 12 is arranged on the second filter paperboard 15 at the top. The liquid enters the filtration unit 1 from the first guide block 11, passes through the first filter paperboard 14 and the second filter paperboard 15 on both sides of the first guide block 11, and is discharged through the second guide block 12. In other embodiments of this invention, the second guide block 12 may also be arranged below the second filter paperboard 15 at the bottom.

[0051] Please see Figure 5 In this embodiment, the second guide block 12 is annular, including a sealing structure 121, a guide structure 122, and a drain port 123. The sealing structure 121 is located on the inner ring of the second guide block 12. Specifically, the sealing structure 121 is an annular protrusion axially arranged along the inner side of the second guide block 12, sealing axially with the first filter paperboard 14. Specifically, the guide structure 122 is a groove radially arranged along the second guide block 12. In this embodiment, the guide structure 122 consists of four grooves equidistantly arranged radially around the central axis of the second guide block 12. Specifically, the drain port 123 is located on the inner side of the second guide block 12. In this embodiment, the drain port 123 consists of four drain holes equidistantly arranged along the inner side of the second guide block 12, with one end of each groove communicating with the drain hole 123. Specifically, after being filtered by the first filter paper 14 and the second filter paper 15, the liquid enters the second guide block 12. Since the guide structure 122 is a groove, the liquid enters the groove and then flows into the drain port 123, which communicates with the groove. That is, the liquid is discharged from the drain port 123. Please refer to [link to relevant documentation]. Figure 3 In the prior art, the flow channel and the sealing protrusion are designed as a single unit, which simultaneously achieves the flow guiding function at the sealing point, resulting in the inability to achieve a complete seal. The technical solution of this embodiment adopts an independent sealing structure 121 and a flow guiding structure 122, which can achieve a complete seal between the second flow guiding block 12 and the filter paperboard. At the same time, the liquid is discharged from the drain port 123 on the inner side of the second flow guiding block 12 through the flow guiding structure 122. The flow guiding function and the sealing function do not affect each other, resulting in better sealing and filtration effects.

[0052] Please see Figure 5 In this embodiment, the outer side of the second guide block 12 is provided with a second extension 124. Specifically, four second extensions 124 are provided at equal intervals on the outer side of the second guide block 12.

[0053] Please see Figure 6In this embodiment, the outer side of the first guide block 11 is provided with a first extension 111 and a liquid inlet 112. Specifically, four first extensions 111 and four liquid inlets 112 are provided at equal intervals on the outer side of the first guide block 11. After the liquid enters the first guide block 11 from the liquid inlet 112, it is filtered by the first filter paperboard 14 and the second filter paperboard 15.

[0054] In this embodiment, the second extension 124 corresponds to the position of the first extension 111.

[0055] Please see Figure 7 In this embodiment, the intermediate pad 13 is used to separate the first filter paperboard 14 and the second filter paperboard 15, so as to avoid the failure of part of the filter area due to the first filter paperboard 14 and the second filter paperboard 15 being too tightly attached, thus affecting the filtration efficiency.

[0056] Example 2:

[0057] This embodiment provides a filter element for a depth filter. Please refer to [link / reference]. Figures 8-10 The filter element includes a filter unit 1, an upper panel 2, a lower panel 3, and a fixing component 4. In this embodiment, the filter element includes multiple filter units 1, which are stacked between the upper panel 2 and the lower panel 3. The fixing component 4 seals the upper panel 2, the lower panel 3, and the filter units 1 as a whole.

[0058] In this embodiment, the filter unit 1 includes a first guide block 11, a second guide block 12, a filter paperboard and an intermediate pad block 13. The filter paperboard includes a first filter paperboard 14 and a second filter paperboard 15, wherein the filtration accuracy of the second filter paperboard 15 is higher than that of the first filter paperboard 14.

[0059] In this embodiment, the first filter paperboard 14, the intermediate pad 13, and the second filter paperboard 15 are sequentially arranged on both sides of the first guide block 11, and the second guide block 12 is arranged on the second filter paperboard 15 at the top. The liquid enters the filtration unit 1 from the first guide block 11, is filtered by the first filter paperboard 14 and the second filter paperboard 15 on both sides of the first guide block 11, and is discharged through the second guide block 12.

[0060] In this embodiment, the second guide block 12 is provided with a second extension 124 on the outside, and the first guide block 11 is provided with a first extension 111 on the outside.

[0061] In this embodiment, after the liquid enters the filter unit 1 through the first guide block 11 of each filter unit 1, it is filtered by the first filter paperboard 14 and the second filter paperboard 15 on both sides of the first guide block 11. When the filter unit 1 is adjacent to or in the middle of the upper cover plate 2, the downstream liquid on one side is discharged through the second guide block 12 of the adjacent filter unit 1, and the downstream liquid on the other side is discharged through the second guide block 12 of this filter unit; when the filter unit 1 is adjacent to the lower cover plate 3, the downstream liquid on one side is discharged through the second guide block 12 of this filter unit, and the downstream liquid on the other side is discharged through the lower cover plate 3.

[0062] Please see Figure 8 In this embodiment, the upper panel 2 has a first buckle 21 on its outer side and a third buckle 22 on its inner side. Specifically, the first buckle 21 consists of multiple sets of L-shaped fasteners arranged opposite each other. The lower panel 3 has a second buckle 31 on its outer side and a fourth buckle on its inner side. Specifically, the second buckle 31 consists of multiple sets of L-shaped fasteners arranged opposite each other. The lower panel 3 also has a flow guiding structure and a drain port similar to the second flow guide block 12, used to discharge downstream liquid from the adjacent filter unit 1.

[0063] Please see Figure 9 In this embodiment, the fixing component 4 includes an outer fixing member 41 and an inner fixing member 42. Specifically, the two ends of the outer fixing member 41 include a first snap-fit ​​member 411, and the two ends of the inner fixing member 42 include a second snap-fit ​​member 421.

[0064] In this embodiment, the outer fixing member 41 cooperates with the first extension member 111, the second extension member 124, the first buckle 21, and the second buckle 31, and the inner fixing member 42 cooperates with the third buckle 22 and the fourth buckle. Specifically, the fixing assembly 4 includes four sets of outer fixing members 41, which are connected to the first buckle 21 and the second buckle 31 through the cooperation of each set of first snap-fit ​​members 411. More specifically, the two sides of the outer fixing member 41 are positioned by the first extension member 111 and the second extension member 124, and the first snap-fit ​​members 411 at both ends of the outer fixing member 41 are fixed by the L-shaped members of the first buckle 21 and the second buckle 31, thus fixing the outer fixing member 41 axially; at the same time, the second snap-fit ​​members 421 at both ends of the inner fixing member 42 are fixed by the third buckle 22 and the fourth buckle, thus sealing the upper panel 2, the lower panel 3, and the filter unit 1 as a whole. The fixing method of this embodiment can accurately position the first guide block and the second guide block, ensuring consistent liquid inflow and outflow, and also prevent the edges of the filter unit 1 from warping. Compared with the prior art, the overall sealing performance is better.

[0065] Example 3:

[0066] This embodiment provides a filter, including a housing and a filter element as described in Embodiment 2. The housing includes an inlet and an outlet, and the filter element is disposed inside the housing.

[0067] In this embodiment, the liquid enters the outer shell from the inlet, then enters the filter element, and is discharged from the outlet after being filtered by the filter element.

[0068] The filter unit of this invention effectively guides the liquid flow and ensures the overall sealing of the filter unit by setting an independent sealing and guiding structure in the second guide block. The filter element of this invention achieves overall sealing through the cooperation of the inner and outer fixing parts, the second extension of the second guide block, the first extension of the first guide block, the upper panel, and the lower panel, ensuring stable internal and external forces on the filter unit. Furthermore, the second extension of the second guide block and the first extension of the first guide block can also position the second and first guide blocks, ensuring consistency between the inlet and outlet. The filter of this invention is simple to install, has high filtration efficiency, and has significant practical value.

[0069] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. The embodiments listed in this utility model cannot exhaustively describe all implementation methods. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model. All documents mentioned in this utility model are incorporated herein by reference as if they were individually incorporated by reference.

Claims

1. A filter unit, characterized by The filter element comprises a first flow guide block, a second flow guide block, filter paper boards and intermediate blocks, wherein the second flow guide block is annular, comprising a sealing structure, a flow guide structure and a liquid discharge port, the sealing structure is arranged on the inner ring of the second flow guide block, the flow guide structure is a groove arranged along the radial direction of the second flow guide block, and the liquid discharge port is arranged on the inner side of the second flow guide block, and one end of the groove is in communication with the liquid discharge port.

2. The filter unit of claim 1, wherein, The filter paper boards comprise first filter paper boards and second filter paper boards, the first flow guide block is respectively provided with the intermediate blocks on both sides, the intermediate blocks are respectively provided with the first filter paper boards and the second filter paper boards on both sides, and the first filter paper boards are arranged between the first flow guide block and the intermediate blocks.

3. The filter unit of claim 2, wherein, The first flow guide block is provided with a liquid inlet, the liquid enters the filter element from the liquid inlet, and after being filtered by the first filter paper boards and the second filter paper boards on both sides of the first flow guide block, the liquid enters the second flow guide block.

4. The filter unit of claim 3, wherein, The outer side of the first flow guide block is provided with a first extension piece.

5. The filter unit of claim 4, wherein, The outer side of the second flow guide block is provided with a second extension piece.

6. A filter cartridge characterized by, The filter element comprises an upper panel, a lower panel and at least one filter unit as claimed in claim 5.

7. The filter cartridge of claim 6, wherein, The filter element comprises a fixing assembly, the outer side of the upper panel is provided with a first buckle, the outer side of the lower panel is provided with a second buckle, the fixing assembly comprises an outer side fixing piece, the outer side fixing piece is matched with the first extension piece, the second extension piece, the first buckle and the second buckle, and the upper panel, the lower panel and the filter unit are integrally sealed.

8. The filter cartridge of claim 7, wherein, The inner side of the upper panel is provided with a third buckle, the inner side of the lower panel is provided with a fourth buckle, the fixing assembly comprises an inner side fixing piece, the inner side fixing piece is matched with the third buckle and the fourth buckle, and the upper panel, the lower panel and the filter unit are integrally sealed.

9. The filter cartridge of claim 8, wherein, Both ends of the outer side fixing piece comprise first clamping pieces for matched connection with the first buckle and the second buckle, and both ends of the inner side fixing piece comprise second clamping pieces for matched connection with the third buckle and the fourth buckle.

10. A filter characterized by, The filter element comprises a housing and a filter element as claimed in any one of claims 6-9, the housing comprises an inlet and an outlet, the filter element is arranged in the housing, liquid enters the filter from the inlet, and after being filtered by the filter element, the liquid is discharged from the outlet.

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