Filter device pre-packaging structure, filter packaging unit and filter device

Abstract

The utility model relates to the technical scheme of filters, in particular to a filter device pre-packaging structure, a filter packaging unit and a filter device.The pre-packaging structure comprises a first screen and a filter layer arranged on at least one side of the first screen, the first screen is provided with a packaging hole area and a communication hole area, a fluxing film is arranged between the filter layer and the first screen, and the packaging hole area is communicated with the communication hole area. The fluxing film comprises a peripheral packaging part surrounding the edge area of the first screen and a hole packaging part used for packaging the packaging hole area, the outer side edge of the peripheral packaging part protrudes out of the first screen, and a first surrounding part surrounding the first screen is formed outside the first screen. According to the scheme, through the fluxing film protruding out of the edge of the first screen, the prepared packaging structure has better sealing performance and bonding performance, and the packaging effect and the yield of the edges of the screens are improved.

Description

Technical Field

[0001] The present application relates to a filter technical solution, and in particular to a filter device pre-packaging structure, a filter packaging unit and a filter device. Background Art

[0002] The filtration step plays a vital role in the fields of biomedicine, chemistry and chemical engineering. When the material flows through the filter layer, the solid components, large molecular clusters, high molecular proteins, viruses and other materials in the material are intercepted by the filter layer, thereby achieving the effect of separation and concentration.

[0003] The membrane package is a commonly used filtering device, which can be used in two forms: tangential flow filtration and vertical flow filtration. In the membrane package, a screen is usually set on the liquid inlet side and the filtrate side of the filter layer to play the role of supporting the flow channel. For the convenience of packaging, in the process of preparing the membrane package, any screen and the filter layer on one side or both sides of the screen are usually pre-packaged to form a filtering packaging unit, and then stacked with the screen on the other side of the filter layer for packaging. In the above packaging process, since the edge of the screen needs to be fluid-sealed, a commonly used method is to seal the edge of the screen with glue, penetrate the screen after the glue is melted, and bond the filter layer on one side or both sides of the screen to achieve the sealing of the edge of the screen. For example, patent CN218188425U discloses a packaging method, in which the edges of the screen and the filter membrane are fixed together by packaging glue, and the packaging glue penetrates into the screen to form a ring-shaped inner edge.

[0004] In the above scheme, the encapsulation glue of the edge area of ​​the screen is generally prepared by pre-laying structures such as film and welding sheet on the screen, laying the filter layer on it, and then heating to melt the film or welding sheet to prepare the encapsulation unit. In the above process, due to the melting process of the glue, it is sometimes difficult to cover the edge area of ​​the screen without limiting, and the glue itself has fluidity. When it cannot form a good edge for the edge of the screen, it will have an adverse effect on the subsequent packaging process. For example, in the subsequent injection molding process of the outer shell, the outer shell glue will penetrate into the screen, thereby destroying the bonding structure between the screen and the filter membrane, occupying the effective filtration area on the screen, etc. Utility Model Content

[0005] In order to improve the packaging effect of the edge of the screen and make the prepared packaging structure have better sealing and bonding properties, the present application provides a pre-packaging structure of a filter device, a packaging unit formed by the pre-packaging component, and a filter device prepared by the above packaging unit.

[0006] First, the present application provides a pre-packaged structure comprising a first screen and a filter layer disposed on at least one side of the first screen, wherein the first screen has a packaging hole area and a connecting hole area, wherein the packaging hole area forms a first packaging hole after the filter device is processed, and the first packaging hole is fluid-tight with the first screen; and the connecting hole area forms a first connecting hole after the filter device is processed, and the first connecting hole is fluid-connected with the first screen;

[0007] A flux film is provided between the filter layer and the first screen, and the flux film includes a peripheral packaging portion surrounding the edge area of ​​the first screen and a hole packaging portion for packaging the packaging hole area, and the outer edge of the peripheral packaging portion protrudes from the first screen, and forms a first surrounding portion surrounding the first screen outside the first screen.

[0008] The above-mentioned pre-packaged structure can be formed into a small package unit after welding, and then combined and packaged with another first screen to prepare a filtering device. In the above process, the flux film can penetrate the first screen during the melting process, and then form a coating and packaging structure at the edge of the first screen. On the other hand, around the packaging hole, the hole packaging part can form a packaging structure that performs fluid sealing on the packaging hole area and the first screen after melting.

[0009] Optionally, the filter layer can be a single-layer filter membrane, a multi-layer composite filter membrane, or a composite structure of a filter membrane-base layer, and the selected material can be polyether, polyolefin, polyester, cellulose, or a composite material, or other film-forming materials. The flux membrane generally has a lower melting point than the filter layer and the first screen. In some cases, the filter layer and the first screen may also have a lower melting point than the flux membrane or a melting point close to that of the flux membrane. In this state, the first screen and the filter layer will melt and fuse with the flux membrane to form a structure similar to welding.

[0010] In the above scheme, the flux film is set to protrude from the first screen on the outside. After the flux film is melted, it can form a structure covering the first screen at the edge of the first screen, so that the outer rubber coating structure is not easy to penetrate into the first screen from the side of the first screen during the subsequent packaging process. Since there is a difference between the heat shrinkage rate of the glue liquid of the outer rubber coating and the flux film, the first screen and the flux film, reducing the infiltration of the glue liquid helps to improve the sealing and reliability of the filter assembly after packaging, improve the sealing and connection firmness between the flux film and the filter layer, and make the prepared membrane package have a better yield rate.

[0011] Preferably, the edge of the filter layer protrudes from the first screen to form a second surrounding portion, and the projection of the first surrounding portion on the filter layer at least partially covers the second surrounding portion.

[0012] In the above scheme, the first screen is set inward compared to the filter layer, so that there is a larger welding area between the filter layer and the flux film. Under the limiting effect of the filter layer, the flux film can be limited by the filter layers on both sides of the first screen after melting, forming a better coating structure for the first screen. In the above case, the integrity of the welding area on the filter layer can be guaranteed during the cutting process, reducing the damage caused after cutting, so that a good coating structure can be formed between the filter layers on both sides of the first screen.

[0013] Preferably, the projection of the first surrounding portion on the plane where the filter layer is located overlaps with the second surrounding portion, or the projection of the first surrounding portion on the plane where the ultrafiltration membrane is located is covered by the second surrounding portion.

[0014] In the above scheme, the fluxing film can be better welded on the filter layer after melting, forming a more complete welding effect, while reducing the waste of the filter layer and fluxing. In the above process, since the second surrounding area in the filter layer can limit the fluxing film from both sides, the fluxing film is reduced to flow outward, so that the fluxing film can better penetrate the first screen and bond to the surface of the ultrafiltration membrane.

[0015] Preferably, the ratio of the width of the first surrounding portion to the width of the peripheral packaging portion in the plane where the first screen is located is 0.1-0.7:1.

[0016] In the above scheme, the ratio of the width of the peripheral packaging part to the width of the first surrounding part is controlled. First, the first surrounding part cannot be set to an area that is too large outside the first screen. This will lead to a poor limiting effect of the first screen on the flux film, making the welding area formed during the melting process prone to damage, affecting the stability of the processing. If the area of ​​the first surrounding part is too small, it will be difficult to cover the first screen from the side during the processing, which will make the first screen prone to poor integrity after processing.

[0017] Preferably, the area of ​​the first screen surface covered by the flux film accounts for no more than 30% of the total area of ​​the first screen, and the projection width of the peripheral packaging portion on the first screen is 0.5-15 mm.

[0018] The area of ​​the flux film on the first screen and the width of the flux film in the first screen directly affect the bonding and sealing properties of the flux film to the first screen, and also reduce the influence of the flux film on the effective filtration area. Within the above range, the encroachment of the flux film on the effective filtration area can be reduced, and the sealing effect of the flux film on the first screen can be better achieved.

[0019] Preferably, there is a protective layer between the flux membrane and the filtration layer, the protective layer has a microchannel for the flux membrane to pass through after melting, and the projection of the protective layer on the plane where the ultrafiltration layer is located covers the projection of the flux membrane on the ultrafiltration layer.

[0020] In the above scheme, by adding a protective layer, the protective layer can be a non-woven structure (such as non-woven fabric) or a screen with fine pores. Its main function is to limit the spread of the flux film on the surface of the filter layer after melting, so that the flux film is limited to a specific range during the melting, bonding and solidification process, and also provides a better bonding and protection structure. At the same time, at the position of the first surrounding part, the protective layer can also better protect the filter layer and reduce the damage to the filter layer caused by the packaging process.

[0021] Preferably, the protective layer is a non-woven fabric structure, and the protective layer has a thickness of not less than 12cc / (cm 2 ·s) air permeability

[0022] In the above scheme, a non-woven fabric with good air permeability is selected. It has a good flow channel for liquid and is relatively soft. It can play a good protective effect and also enhance the strength of welding, making it difficult for the filter layer and the first screen to separate after welding. At the same time, it also protects the filter layer under the high temperature of welding.

[0023] Preferably, at least two positioning holes are provided on the pre-packaging structure, and the positioning holes penetrate the entire pre-packaging structure in the thickness direction of the pre-packaging structure.

[0024] On the one hand, the positioning holes facilitate the packaging of the pre-packaged structure, making it easier to position the pre-packaged structure during the packaging process and improving the accuracy of the packaging process. At the same time, the positioning holes also facilitate the gas flow inside and outside the pre-packaged component during packaging, forming a uniform air pressure and preventing the filter component from having an uneven surface during the packaging process.

[0025] Preferably, the positioning hole is opened on the peripheral packaging portion, and the positioning hole passes through the first screen.

[0026] In the above scheme, after subsequent processing, the positioning holes can be directly cut out, and will not affect the completed filtering device. In this case, even if a small amount of incomplete welding, low welding degree or poor packaging occurs around the positioning holes, they can be cut out as a whole, thereby ensuring the yield rate of the membrane package.

[0027] Preferably, the positioning holes are opened in the packaging hole area and / or the communication hole area.

[0028] In the above scheme, the positioning holes are set in the packaging hole area or the connecting hole area. Considering that the packaging hole area and the connecting hole area themselves need to be opened, and the internal first screen and filter layer are cut, this scheme can reduce material loss, and at the same time, the processing is more convenient and the processing effect is improved.

[0029] On the basis of the above scheme, it is further preferred that the positioning hole is opened in the packaging hole area, and the first sieve is provided with a first packaging hole in the packaging hole area, the projection of the positioning hole on the plane where the first sieve is located falls into the first packaging hole, and the diameter of the positioning hole is smaller than the diameter of the first packaging hole; and / or, the positioning hole is opened in the connecting hole area, and when the pre-packaged component is packaged as a filtering device, the positioning hole serves as a connecting hole, or a connecting hole is opened around the positioning hole to cover the area where the positioning hole is located.

[0030] In the above scheme, the positioning device can be provided in the packaging hole area or the connecting hole area. When the positioning hole is in the packaging hole area, setting the diameter of the first positioning hole smaller than the first packaging hole can improve the flatness of the filter device during packaging, reduce the warping and distortion caused during welding, and improve the yield rate of the prepared filter device.

[0031] When the positioning hole is set in the connecting hole area, since the connecting hole itself does not need to be encapsulated, the impact of the positioning hole on the welding process can be reduced. At the same time, under this scheme, if the encapsulation hole area does not need to be set with a positioning hole, the first encapsulation hole can be completely covered with a flux film, and then punching can be performed in the subsequent processing.

[0032] In addition, based on the above technical solution, the present application also provides a filtering packaging unit, which is obtained by packaging the above filtering device pre-packaging component. During the packaging, the flux film melts and penetrates through the first screen, and performs fluid sealing on the first screen.

[0033] The above-mentioned packaging unit is obtained by packaging the pre-packaging assembly as described above. During the packaging process, heat source and pressure can be applied from one or both sides by hot pressing or other methods, so that the flux film is melted to form a structure of a filter layer bonded to both sides or one side of the first screen. If the first screen has a flux film and a filter layer on only one side, the packaging unit should be packaged at the outermost side of the filter device. If the first screen is provided with a flux film and a filter layer on both sides, the packaging unit can be packaged at the outermost side of the filter device or provided inside the filter device. In the above process, when packaging, the flux film at the position of the first surrounding portion can be melted to form an edge-wrapped structure wrapped around the edge of the first screen. The structure can better wrap and package the peripheral area of ​​the first screen, thereby improving the sealing of the first screen.

[0034] On the basis of the above, the above encapsulation unit can be further prepared into a filtering device. Specifically, it includes alternately stacked liquid inlet units and filtrate units, wherein one of the liquid inlet unit and the filtrate unit is the encapsulation unit as described above, and the other is a second screen, or one of the liquid inlet unit and the filtrate unit is obtained by cutting the encapsulation unit as described above, and the other is a second screen; the second screen has a second encapsulation hole and a second connecting hole, wherein the second encapsulation hole is directly connected to the connecting hole, the second connecting hole is directly connected to the encapsulation hole, and the second encapsulation hole has a second hole encapsulation part for fluid-sealing the second encapsulation hole and the second screen.

[0035] In the above scheme, the prepared packaging unit can be cut or punched, or it can be cut in advance when preparing the first screen and the filter layer, and then combined to form a pre-packaged structure, and further prepared into a packaging unit and a filter device. In the cutting process, the cutting can be performed along the edge of the first screen, so that the flux film wrapped outside the first screen is completely removed after the packaging is completed. In this state, since the first screen is well wrapped during the packaging process of the flux film, the overall packaging yield is still high.

[0036] Based on the above scheme, the packaging unit and the second screen can be packaged into a filtering device, wherein, since the packaging unit has been packaged, only the second screen and the packaging unit need to be packaged. Specifically, the second packaging part on the second screen specifically includes a second peripheral packaging part surrounding the edge of the second screen and a second hole packaging part arranged around the second packaging hole. Specifically, the second packaging part can be formed by preset film bonding, glue penetration or elastic cushion layer extrusion sealing.

[0037] In the above process, since the pre-packaged packaging unit itself has a good packaging structure, it is not easily damaged by subsequent packaging steps during subsequent packaging, nor is it easy to cause damage to the internal structure of the packaging unit, which greatly improves the yield rate of membrane package filtration devices.

[0038] In summary, the present application greatly improves the product yield during the packaging process by setting up a flux-aiding membrane structure that protrudes from the first screen at the periphery, and reduces the risk of breakage and reduced airtightness of the membrane package-type filtering device after preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the overall structure of the filtering device in Example 1;

[0040] Figure 2 A schematic diagram of stacking a packaging unit and a second screen;

[0041] Figure 3This is a schematic diagram of the layer structure of the pre-packaged structure in Example 1;

[0042] Figure 4 It is a schematic structural diagram of the first surrounding portion and the second surrounding portion in the edge region after the pre-packaged structure is stacked in Example 1;

[0043] Figure 5 It is a schematic structural diagram of the edge cutting area after the pre-packaged structure in Example 1 is packaged into a package unit;

[0044] Figure 6 This is a schematic diagram of the layer structure of the pre-packaged structure in Example 2;

[0045] Figure 7 A schematic diagram of the structure of the first surrounding portion and the second surrounding portion in the edge region after the pre-packaged structure is stacked in Example 2;

[0046] Figure 8 This is a schematic diagram of the layer structure of the pre-packaged structure in Example 3;

[0047] Fig. 9 This is a schematic diagram of the layer structure of the pre-packaged structure in Example 4;

[0048] Fig.10 This is a schematic structural diagram of the first surrounding portion and the second surrounding portion in the edge region after the pre-packaged structure is stacked in Example 4.

[0049] In the figure, 1, the first screen; 11, the first packaging hole; 12, the first connecting hole; 13, the packaging hole area; 14, the connecting hole area; 2, the filtering layer; 21, the third through hole; 22, the fourth through hole; 23, the second surrounding part; 3, the flux film; 31, the hole packaging part; 32, the peripheral packaging part; 33, the first surrounding part; 4, the protective layer; 5, the second screen; 51, the second packaging hole; 52, the second connecting hole; 53, the second packaging part; 531, the second hole packaging part; 532, the second peripheral packaging part; 6, the packaging unit; 61, the first through hole; 62, the second through hole; 7, the exhaust hole; 8, the positioning hole. DETAILED DESCRIPTION

[0050] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0051] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Embodiment 1 relates to a filtering device, the overall structure of which is as follows Figure 1 and Figure 2 As shown. The filtering device is obtained by packaging the pre-packaging components to obtain the packaging unit 6, and then assembling the packaging unit 6 and the second screen 5. Specifically, the packaging unit 6 and the second screen 5 are both roughly rectangular. When packaging, the packaging unit 6 and the second screen 5 are stacked alternately and packaged. Specifically, the packaging unit 6 is provided with a first through hole 61 and a second through hole 62 that penetrates the packaging unit 6 in the thickness direction of the packaging unit 6, and the second screen 5 is provided with a second packaging hole 51 and a second connecting hole 52, wherein the first through hole 61, the second through hole 62, the second packaging hole 51 and the second connecting hole 52 are all circular, and specifically, the second packaging hole 51 and the first through hole 61 are connected oppositely, and the second connecting hole 52 and the second through hole 62 are connected oppositely.

[0054] Reference Figure 2The second screen 5 has a second packaging part 53, which is used to package the second screen 5 and the packaging unit 6, wherein the second packaging part 53 includes a second hole packaging part 531 that seals the second packaging hole 51 and a second peripheral packaging part 532 arranged in the area surrounding the second screen 5. The second hole packaging part 531 is formed by laying a film or glue at a position surrounding the second packaging hole 51, and then curing it so that it penetrates the second screen 5 and adheres to the surface of the packaging unit 6 on both sides of the second screen 5, forming a structure surrounding the second packaging hole 51 and sealing the second packaging hole 51 and the second screen 5 to the fluid, and its shape can be annular, square or ram-horn. The second peripheral packaging part 532 can be formed by surrounding the edge area of ​​the second screen 5 with a film or glue, and after curing, it penetrates the second screen 5 and adheres or squeezes and seals the surface of the packaging unit 6 on both sides of the second screen 5. The edge of the second screen 5 can protrude from the second peripheral packaging part or be flush with the second peripheral packaging part. After the second screen 5 and the packaging unit 6 are packaged, they can be packaged by a soft or hard shell to form a complete filtering device.

[0055] The encapsulation unit 6 used in this embodiment is as follows Figure 3 and Figure 4 Specifically, the filter device pre-packaged structure shown in this embodiment includes a first screen 1 and filter layers 2 arranged on both sides of the first screen 1. Specifically, in this application, the filter layer 2 is a PES double-layer filter membrane. Before packaging, the structure of the first screen 1 is as shown in FIG. Figure 3 As shown, it has a packaging hole area 13 and a connecting hole area 14. The area corresponding to the packaging hole area 13 forms a second through hole 62 that penetrates the pre-packaged structure after packaging, and the area corresponding to the connecting hole area 14 forms a first through hole 61 that penetrates the pre-packaged structure after packaging. When the filtration device in this embodiment is filtering, the liquid enters the second screen 5 through the second connecting hole 52 and the second through hole 62, and spreads on the side of the filter layer 2 facing the second screen 5, then passes through the filter layer 2, and spreads on the first screen 1, and flows out through the second packaging hole 51 and the first through hole 61. After the liquid in the second screen 5 is concentrated, the residual liquid produced flows out from the second connecting hole 52 and the second through hole 62 on the opposite side where no liquid enters, thereby achieving the effect of concentration and separation. Alternatively, the second through hole 62 that does not enter the liquid can also be blocked to achieve the effect of dead-end filtration.

[0056] In this embodiment, refer to Figure 3 and Figure 4 On the first screen 1, a first packaging hole 11 (i.e. Figure 3 A first connecting hole 12 (i.e. Figure 3A small hole in the filter layer 2 is formed on the filter layer 2, and a third through hole 21 is formed on the filter layer 2 at a position corresponding to the packaging hole area 13, and a fourth through hole 22 is formed on the filter layer 2 at a position corresponding to the connecting hole area 14. During the packaging process, the third through hole 21 and the first packaging hole 11 are used as positioning holes 8, and three or more positioning rods are passed through the positioning holes 8 to achieve positioning during the packaging process. It should be noted that the positioning hole 8 is provided in the third through hole 21 here only for the convenience of welding. In fact, if the working conditions permit, it is also a feasible solution to set the fourth through hole 22 as the positioning hole 8. Generally, at least two positioning holes 8 are required to achieve a good positioning effect. Generally, three to four positioning holes can be provided to form a relatively uniform positioning system.

[0057] In the above-mentioned pre-packaged structure, a flux film 3 is arranged between the filter layer 2 and the first screen 1, and is used to package the first screen 1 and the filter layer 2, wherein the flux film 3 is made of HDPE, and includes a hole packaging portion 31 and a peripheral packaging portion 32, wherein the hole packaging portion 31 is arranged around the periphery of the first packaging hole 11, and the peripheral packaging portion 32 is arranged around the edge of the first screen 1. The positional relationship between the peripheral packaging portion 32 and the edge area of ​​the first screen 1 is as shown in FIG. Figure 4 As shown, specifically, the outer edge of the peripheral packaging portion 32 protrudes from the edge of the first screen 1, forming a first surrounding portion 33 surrounding the outer side of the edge of the first screen 1. During the packaging process, the flux film 3 will be coated on the side of the first screen 1 after melting, forming a good coating state, thereby achieving a good packaging effect, and greatly improving the yield rate of the filter device. Further, the edge of the filter layer 2 also protrudes from the second screen 5, forming a second surrounding portion 23. In this embodiment, the projection of the first surrounding portion 33 on the filter layer 2 completely falls on the second surrounding portion 23, so the second surrounding portion 23 can better limit the welding process of the flux film 3. In other embodiments, the second surrounding portion 23 can also be set to a shape larger than the first surrounding portion 33, which can have a better limiting effect, and correspondingly, a certain amount of material waste will also be generated. When a flux film 3 material with greater fluidity is used during packaging, this method can be used and cut in the subsequent processing process.

[0058] The structure of the packaging unit cutting is as follows Figure 5 As shown, in this embodiment, the flux film 3 can form a structure that penetrates into the first drying net 1 after packaging and covers the first screen 1 from the edge area, and then can be cut along the dotted line through any one of the cutting sites 1, 2 and 3.

[0059] It should be noted that in the present application, no hole is opened on the hole packaging portion 31 of the flux membrane 3. In an actual solution, a small hole may be opened or a hole that is the same as the first through hole 61 or the second through hole 62 may be directly opened. Subsequently, in order to maintain smooth flow of liquid in the filter device, the packaging hole area 13 may be further cut.

[0060] In this embodiment, different projection widths of the peripheral packaging portion 32 on the first screen 1 and widths of the first surrounding portion 33 are set, as shown in Table 1.

[0061] Table 1

[0062]

[0063] From Table 1, it can be seen that the ratio of the width of the first surrounding portion to the width of the peripheral encapsulation portion should be within 0.1-0.7:1, and when the projection width of the peripheral encapsulation portion on the first screen is 0.5-15 mm, the overall yield rate can be better. However, when the coverage area of ​​the peripheral encapsulation portion on the first screen is too large, although the yield rate is not significantly affected, the excessive coverage area will cause the effective filtration area of ​​the filtration layer to decrease, which is equivalent to reducing the filtration effect.

[0064] Example 2, reference Figure 6 and Figure 7 As shown, on the basis of Example 1, a protective layer 4 is further added between the fluxing membrane 3 and the filter layer 2 to protect the stability of the filter layer 2 during the welding process and reduce the filter layer 2. In this embodiment, the protective layer 4 is a non-woven fabric with an air permeability of 12cc / (cm 2 ·s) for the flux film 3 to pass through after melting. In the present embodiment, the projection of the protective layer 4 on the plane where the ultrafiltration layer is located covers the projection of the flux film 3 on the ultrafiltration layer. Specifically, for the convenience of setting, the protective layer 4 is directly set to completely cover the surface of the filter layer 2. In other schemes, the protective layer 4 can also be set to completely cover the area where the flux film 3 and the filter layer 2 are in contact, or when the overall projection area of ​​the filter layer 2 is larger than the flux film 3, the protective layer 4 is set to cover the area covered by the flux film 3 and the effective filtration area on the filter layer 2 (i.e., the inside of the projection area of ​​the flux film 3). During the packaging of the flux film 3, its flow will be limited by the protective layer 4, forming a permeable protective layer 4, or a packaging system that melts together with the protective layer 4.

[0065] The yield rate of Example 2 is 98.9%.

[0066] Example 3, reference Figure 8On the basis of Example 1, in the pre-packaged structure, the first connecting hole 12 and the fourth through hole 22 are not opened in advance, only the first packaging hole 11 and the third through hole 21 are opened in advance, and in the area where the fourth through hole 22 is originally required to be opened, a vent hole 7 with a smaller aperture is opened for exhaust, and the specific structure is as follows. In the process of packaging the above-mentioned pre-packaged structure into a filter packaging unit 6, and then packaging the filter packaging unit 6 and the second screen 5 into a filter device, the vent hole 7 can be punched in any step after welding to obtain the first through hole 61. There is no obvious difference in the yield rate between the above scheme and Example 1.

[0067] It should be noted that in Examples 1 to 3, another alternative preparation method is as follows: the fourth through hole 22 is used as the positioning hole 8, or part of the third through hole 21 or the fourth through hole 22 is selected as the positioning hole 8, and the other third through holes 21 and the fourth through holes 22 are directly opened, or the exhaust holes 7 are pre-opened at the corresponding positions. The above scheme can be selected according to whether the actual construction is convenient. In addition, optionally, on the basis of this embodiment, a non-woven fabric protective layer 4 can also be added similar to Example 2.

[0068] Example 4, reference Fig. 9 and Fig.10 , the position of the positioning hole 8 is adjusted based on Example 2, specifically as follows:

[0069] In this embodiment, the positioning hole 8 is opened on the peripheral packaging portion 32 and passes through the first screen 1 and the filter layer 2. At the position of the packaging hole area 13 and the connecting hole area 14 of the pre-packaging structure in Example 1, the exhaust hole 7 that passes through each layer in the pre-packaging structure is pre-opened.

[0070] After the packaging is completed, the prepared packaging unit 6 can be cut and punched, or the filtering device can be directly cut and punched after the packaging unit 6 and the second screen 5 are further packaged. The positions of the positioning holes 8 can be evenly set on the four sides, on the four corners, or on the two opposite sides. In this solution, the positioning holes 8 directly pass through the flux membrane 3 and the filter layer 2 without passing through the first screen 1. When cutting, the first screen 1 may not be cut, thereby reducing the burrs, protrusions and other structures caused by the cutting of fibers on the screen.

[0071] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A pre-packaged structure of a filter device, comprising a first screen and a filter layer arranged on at least one side of the first screen, wherein the first screen has a packaging hole area and a connecting hole area, wherein the packaging hole area forms a first packaging hole after the filter device is processed, and the first packaging hole is fluid-tight with the first screen; and the connecting hole area forms a first connecting hole after the filter device is processed, and the first connecting hole is fluid-connected with the first screen; characterized in that: A flux film is provided between the filter layer and the first screen, and the flux film includes a peripheral packaging portion surrounding the edge area of ​​the first screen and a hole packaging portion for packaging the packaging hole area, and the outer edge of the peripheral packaging portion protrudes from the first screen, and forms a first surrounding portion surrounding the first screen outside the first screen.

2. A filter device pre-packaging structure according to claim 1, characterized in that: The edge of the filter layer protrudes from the first screen to form a second surrounding portion, and the projection of the first surrounding portion on the filter layer at least partially covers the second surrounding portion.

3. A filter device pre-packaging structure according to claim 2, characterized in that: The projection of the first surrounding portion on the plane where the filter layer is located overlaps with the second surrounding portion, or the projection of the first surrounding portion on the plane where the ultrafiltration membrane is located is covered by the second surrounding portion.

4. A filter device pre-packaging structure according to claim 1, characterized in that: The ratio of the width of the first surrounding portion to the width of the peripheral packaging portion in the plane where the first screen is located is 0.1-0.7:

1.

5. A filter device pre-packaging structure according to claim 1, characterized in that: The area of ​​the first screen surface covered by the flux film accounts for no more than 30% of the total area of ​​the first screen, and the projection width of the peripheral packaging part on the first screen is 0.5-15 mm.

6. A filter device pre-packaging structure according to claim 1, characterized in that: A protective layer is provided between the fluxing membrane and the filtration layer. The protective layer has a microchannel for the fluxing membrane to pass through after melting. The projection of the protective layer on the plane where the ultrafiltration layer is located covers the projection of the fluxing membrane on the ultrafiltration layer.

7. A filter device pre-packaging structure according to claim 6, characterized in that: The protective layer is a non-woven fabric structure, and the protective layer has a thickness of not less than 12cc / (cm 2 ·s) air permeability.

8. A filter device pre-packaging structure according to claim 1, characterized in that: At least two positioning holes are also formed on the pre-packaging structure, and the positioning holes penetrate the entire pre-packaging structure in the thickness direction of the pre-packaging structure.

9. A filter device pre-packaging structure according to claim 8, characterized in that: The positioning hole is opened on the peripheral packaging part, and the positioning hole passes through the first screen.

10. A filter device pre-packaging structure according to claim 8, characterized in that: The positioning holes are opened in the packaging hole area and / or the communication hole area.

11. A filter device pre-packaging structure according to claim 10, characterized in that: The positioning hole is opened in the packaging hole area, and the first screen is provided with a first packaging hole in the packaging hole area, the projection of the positioning hole on the plane where the first screen is located falls into the first packaging hole, and the diameter of the positioning hole is smaller than the diameter of the first packaging hole; and / or, The positioning hole is opened in the communicating hole area. When the pre-packaged component is packaged as a filtering device, the positioning hole is used as a communicating hole, or a communicating hole is opened around the positioning hole to cover the area where the positioning hole is located.

12. A filtering packaging unit, characterized in that: The filter is obtained by packaging the filter device pre-package assembly according to any one of claims 1 to 11; during packaging, the flux film melts and penetrates through the first screen, and performs fluid sealing on the first screen.

13. A filtering device, characterized in that: The invention comprises a liquid inlet unit and a filtrate unit which are alternately stacked, wherein one of the liquid inlet unit and the filtrate unit is the encapsulation unit as claimed in claim 12, and the other is a second screen, or one of the liquid inlet unit and the filtrate unit is obtained by cutting the encapsulation unit as claimed in claim 12, and the other is the second screen; The second sieve has a second packaging hole and a second connecting hole, wherein the second packaging hole is directly connected to the first connecting hole, the second connecting hole is directly connected to the first packaging hole, and the second packaging hole has a second hole packaging part for fluid sealing the second packaging hole and the second sieve.

Images