Filter

Abstract

The utility model discloses a filter which comprises at least one filter assembly, a filter cavity for installing a filter unit and a plurality of cavities communicated with the filter cavity are arranged in the filter assembly, the cavities comprise a liquid inlet cavity and a liquid penetrating cavity, and liquid ports communicated with the cavities are arranged on the upper end face and the lower end face of the filter assembly. The liquid ports communicated with the same cavity are distributed oppositely, and the outer ends of the liquid ports are sleeved with sealing pieces. According to the scheme, the filtering area of the filter can be adjusted, only the multiple filtering assemblies need to be installed in the filter, and when the multiple filtering assemblies are stacked, the liquid openings in every two adjacent filtering assemblies are in one-to-one correspondence and communicate with each other in a sealed mode through the corresponding sealing piece, so that the filter adapts to different filtering capacity requirements; the mode of preassembling the filter unit by the filter assembly enables the filter unit not to be easily polluted by the external environment in the transportation, installation and adjustment processes of the filter, and the filtering performance of the filter is not reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a filter. Background Art

[0002] In the existing market, filters are used to filter liquids containing impurities. In practical applications, the filter area needs to be adjusted to meet different filtering processing requirements. However, the filtering processing capacity of most existing filters is fixed and cannot be adjusted. When adjusting the filtering area of ​​the existing laminated filter (the main structure includes a housing and a filter unit, and the filter unit includes a filter membrane and a filter membrane bracket), the corresponding filter unit needs to be stacked. The filter unit is prone to contamination during transportation, installation and adjustment, which reduces the filtering performance of the filter.

[0003] For example, Chinese patent publication number CN217795507U, publication date November 15, 2022, is named "A forward flow and tangential flow compatible laminated filter", including a base for fixing and supporting the filter, a fluid inlet for liquid inlet, an outlet for exhaust or discharge of reflux liquid, and a filtering structure for tangential flow or forward flow filtering. The base is arranged at the lower part of the filter, the fluid inlet is arranged on the base, and the outlet is arranged on the side of the filter away from the fluid inlet. The outlet includes a first outlet for the outflow of reflux liquid or gas and a second outlet for the outflow of permeate. The second outlet is arranged below the first outlet. The filtering structure includes a plurality of filtering units, and the filtering unit includes a pair of support plates, the support plates include a first support plate and a second support plate, and the first support plate and the second support plate are combined with a single-layer or multi-layer filter membrane on both sides.

[0004] The disadvantage of the existing patent is that when adjusting the filter area of ​​the existing filter, the corresponding filter unit needs to be superimposed. The filter unit is exposed to the external environment during transportation, installation and adjustment, which can easily cause the filter unit to be contaminated by the external environment, thereby reducing the filtering performance of the filter. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the filter unit of the existing filter is easily polluted by the external environment and the filtering performance of the filter is reduced when the filtering area is adjusted, and to provide a filter that can adapt to different filtering processing volume requirements by adjusting the filtering area and protect the filter unit from being polluted.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A filter includes at least one filter assembly, wherein a filter cavity for installing a filter unit and a plurality of cavities connected to the filter cavity are provided in the filter assembly, wherein the cavity includes a liquid inlet cavity and a liquid permeation cavity, and liquid ports connected to each cavity are provided on the upper end surface and the lower end surface of the filter assembly, wherein the liquid ports connected to the same cavity are arranged opposite to each other, and a seal is provided at the outer end of the liquid port. A filter described in this scheme includes at least one filter assembly, wherein the filter assembly pre-installs the filter unit in the filter cavity, and when the filter area needs to be adjusted, it is only necessary to install a plurality of filter assemblies in the filter, and when the plurality of filter assemblies are stacked, the liquid ports on two adjacent filter assemblies correspond to each other and are sealed and connected through the seal, so that the filter can adapt to different filter processing volume requirements. Since the filter assembly pre-installs the filter unit, and the filter unit includes a filter membrane and a filter membrane bracket, the filter unit will not be exposed to the external environment when the filter area is adjusted. The filter assembly pre-installs the filter unit so that the filter unit is not easily contaminated by the external environment during the transportation, installation and adjustment of the filter, and the filter performance of the filter will not be reduced. The filter unit is a prior art, and according to actual needs, a filter unit with forward flow, tangential flow, or a filter unit compatible with forward flow and tangential flow is placed in the filter cavity.

[0008] The cavity includes a liquid inlet cavity and a permeate cavity, the liquid port includes a liquid inlet and a permeate cavity, the liquid inlet is connected with the liquid inlet cavity, the permeate cavity is connected with the permeate cavity, the raw liquid to be filtered enters the liquid inlet cavity, the filtration unit and the permeate cavity in sequence through the liquid inlet, and then flows out from the permeate cavity to complete the filtration.

[0009] Preferably, the number of the filter assemblies is multiple, and the multiple filter assemblies are stacked and arranged, and the liquid ports on two adjacent filter assemblies correspond to each other and are sealed and connected through a seal. When the filtration area needs to be adjusted, it is only necessary to install multiple filter assemblies in the filter, and the multiple filter assemblies are stacked and arranged so that the filter can adapt to different filtration processing requirements. The seal enables the stacked filter assemblies to be sealed and connected, and the liquid ports on two adjacent filter assemblies correspond to each other and are sealed and connected through the seal.

[0010] Preferably, the liquid ports on the upper and lower surfaces of the filter assembly that are connected to the same cavity are connected through a through hole, the upper end of the through hole is connected to the upper end of the filter assembly, and the lower end is connected to the lower end of the filter assembly. When multiple filter assemblies are stacked, the through holes of two adjacent filter assemblies are connected, and the through holes make the liquid flow more smoothly. The raw liquid to be filtered flows in each through hole and is evenly distributed to the filter cavity of each filter assembly; the filtered liquid flows out of the liquid cavity to the corresponding through hole for discharge, making the filtered liquid discharge smoother.

[0011] Preferably, the cavity also includes a liquid outlet cavity for exhaust or reflux, and the liquid inlets connected to the liquid outlet cavity are arranged opposite to each other on the upper and lower end surfaces of the filter assembly. When the filter unit adopts forward flow filtering, the liquid inlet connected to the liquid outlet cavity serves as an exhaust port; when the filter unit adopts tangential flow filtering, the liquid inlet connected to the liquid outlet cavity serves as a reflux liquid inlet. This allows the filter assembly to satisfy forward flow filtering or tangential flow filtering.

[0012] Preferably, the filter assembly includes two cover plates symmetrically arranged up and down, the cover plates are provided with mounting grooves, and the mounting grooves on the two cover plates are matched to form a filter cavity. The filter cavity is formed by matching the cover plates symmetrically arranged up and down, which makes the installation of the filter unit more convenient, the production of the parts of the filter assembly more convenient, reduces the number of molds required for production, and reduces production costs.

[0013] Preferably, the cover plate comprises a cover plate body and a liquid plate arranged on the cover plate body, a cavity is formed between the liquid plate and the cover plate body, and the liquid port is located on the liquid plate. The liquid plate facilitates the formation of the cavity.

[0014] Preferably, the liquid plate comprises a liquid inlet plate and a permeate plate, wherein a liquid inlet cavity is formed between the liquid inlet plate and the cover plate body, and a permeate cavity is formed between the permeate plate and the cover plate body. The liquid inlet port is located on the liquid inlet plate, and the permeate port is located on the permeate plate.

[0015] Preferably, the cover plate further comprises a liquid outlet plate arranged on the cover plate body, and a liquid outlet cavity is formed between the liquid outlet plate and the cover plate body. The liquid port comprises a liquid outlet, and the liquid outlet is located on the liquid outlet plate. The liquid outlet plate and the permeate plate are arranged separately or integrally.

[0016] Preferably, the cover plate is provided with a liquid inlet groove and a permeate groove, the liquid inlet grooves on the two cover plates are matched to form a liquid inlet cavity, and the permeate grooves on the two cover plates are matched to form a permeate cavity. The cover plate only needs to be formed once, and when assembling the filter assembly, only the two cover plates need to be matched and connected, which reduces the operation steps.

[0017] Preferably, a plurality of flow channels are provided on the inner wall of the filter cavity, and the flow channels include a liquid inlet flow channel, a permeate flow channel and a liquid outlet flow channel, the liquid inlet flow channel is connected to the liquid inlet cavity, the permeate flow channel is connected to the permeate cavity, and the liquid outlet flow channel is connected to the liquid inlet cavity and the liquid outlet cavity. The flow channels are all provided on the inner wall of the filter cavity and are connected to the inner wall of the filter cavity.

[0018] Preferably, a sealing groove is provided on the outer wall of the cover plate, the sealing member is located in the sealing groove, and the sealing groove is sleeved on the outer end of the liquid port. The sealing groove on the upper end surface is flush with the upper end surface of the cover plate, and the sealing groove on the lower end surface is flush with the lower end surface of the cover plate, so as to facilitate the stacking of multiple filter assemblies.

[0019] Therefore, the utility model has the following beneficial effects: it is capable of adjusting the filtering area of ​​the filter by installing multiple filter components in the filter; when multiple filter components are stacked, the liquid ports on two adjacent filter components correspond one to one and are sealed and connected through seals, so that the filter can adapt to different filtering processing volume requirements; the way the filter component is pre-installed on the filter unit makes it difficult for the filter unit to be contaminated by the external environment during the transportation, installation and adjustment of the filter, and will not reduce the filtering performance of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is an exploded view of the utility model.

[0022] Figure 3 It is an exploded view of the cover plate in the utility model.

[0023] Figure 4 It is a sectional view of the utility model.

[0024] Figure 5 It is a structural schematic diagram of the cover plate in the utility model.

[0025] Figure 6 It is a structural schematic diagram of the first supporting plate in the utility model.

[0026] Figure 7 It is a structural schematic diagram of the second supporting plate in the utility model.

[0027] Figure 8 It is a structural schematic diagram of the filter membrane in the utility model.

[0028] As shown in the figure:

[0029] Filter chamber 1, mounting groove 1.1, first liquid passage hole 1.2, second liquid passage hole 1.3,

[0030] Filter unit 2,

[0031] Sealing shell 2.1, sealing frame 2.1.1, sealing gasket 2.1.2,

[0032] Filter unit 2.2, first support plate 2.2.1, second support plate 2.2.2, filter membrane 2.2.3,

[0033] Inlet liquid chamber 3, permeate liquid chamber 4, outlet liquid chamber 5, inlet liquid hole 6, permeate liquid hole 7, inlet liquid port 8, permeate liquid port 9, outlet liquid port 10,

[0034] Cover plate 11, cover plate body 11.1, liquid inlet plate 11.2, liquid permeation plate 11.3,

[0035] Flow channel 12, liquid inlet flow channel 12.1, permeate flow channel 12.2, liquid outlet flow channel 12.3. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the technical solution embodiments of the utility model clearer, the utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Embodiment 1, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 A filter shown includes at least one filter assembly, wherein a filter chamber 1 for installing a filter unit 2.22 and a plurality of cavities connected to the filter chamber 1 are provided in the filter assembly, wherein the cavity includes a liquid inlet chamber 3 and a liquid permeation chamber 4, and liquid ports connected to each cavity are provided on the upper end surface and the lower end surface of the filter assembly, and the liquid ports connected to the same cavity are arranged opposite to each other, and a sealing member is provided on the outer end sleeve of the liquid port.

[0038] A filter in the above embodiment includes at least one filter assembly, and the filter assembly pre-installs the filter unit 2.22 in the filter chamber 1. When the filter area needs to be adjusted, it is only necessary to install multiple filter assemblies in the filter. When multiple filter assemblies are stacked, the liquid ports on two adjacent filter assemblies correspond to each other and are sealed and connected through a seal, so that the filter can adapt to different filter processing volume requirements. Since the filter assembly pre-installs the filter unit 2.22, the filter unit 2.22 includes a filter membrane 2.2.3 and a filter membrane 2.2.3 bracket. Therefore, when the filter area is adjusted, the filter unit 2.22 will not be exposed to the external environment. The filter assembly pre-installs the filter unit 2.22 so that the filter unit 2.22 is not easily contaminated by the external environment during the transportation, installation and adjustment of the filter, and the filtering performance of the filter will not be reduced. The filter unit 2.22 is a prior art, and a filter unit 2.22 that adopts forward flow, tangential flow or compatible with forward flow and tangential flow is placed in the filter chamber 1 according to actual needs.

[0039] This embodiment can be applied to biopharmaceuticals, fermentation filtration and other related fields to filter liquids containing impurities.

[0040] The cavity includes a liquid inlet cavity 3 and a permeate cavity 4, and the liquid port includes a liquid inlet 8 and a permeate cavity 9. The liquid inlet 8 is connected to the liquid inlet cavity 3, and the permeate cavity 9 is connected to the permeate cavity 4. The raw liquid to be filtered enters the liquid inlet cavity 3, the filter unit 2.22, and the permeate cavity 4 in sequence through the liquid inlet 8, and then flows out from the permeate cavity 9 to complete the filtration. This solves the problem that when adjusting the filtration area of ​​the existing filter, the corresponding filter unit 2.22 needs to be superimposed, and the filter unit 2.22 is exposed to the external environment during transportation, installation and adjustment, which easily causes the filter unit 2.22 to be contaminated by the external environment, thereby reducing the filtration performance of the filter.

[0041] Specifically, there are multiple filter assemblies, which are stacked and arranged, and the liquid ports on two adjacent filter assemblies correspond to each other and are sealed and connected through a seal. When the filtration area needs to be adjusted, it is only necessary to install multiple filter assemblies in the filter, and the multiple filter assemblies are stacked and arranged so that the filter can adapt to different filtration processing requirements. The seal enables the stacked filter assemblies to be sealed and connected, and the liquid ports on two adjacent filter assemblies correspond to each other and are sealed and connected through the seal.

[0042] Further, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the cavity also includes a liquid outlet cavity 5 for exhaust or reflux, and the liquid ports connected to the liquid outlet cavity 5 are arranged opposite to each other on the upper and lower end surfaces of the filter assembly. When the filter unit 2.22 uses forward flow filtering, the liquid port connected to the liquid outlet cavity 5 is used as an exhaust port; when the filter unit 2.22 uses tangential flow filtering, the liquid port connected to the liquid outlet cavity 5 is used as a reflux liquid port. This allows the filter assembly to satisfy forward flow filtering or tangential flow filtering.

[0043] Further, such as Figure 1 , Figure 4 As shown, a sealing groove is provided on the outer wall of the cover plate 11, a sealing member is located in the sealing groove, and the sealing groove is sleeved on the outer end of the liquid port. The sealing groove on the upper end surface is flush with the upper end surface of the cover plate 11, and the sealing groove on the lower end surface is flush with the lower end surface of the cover plate 11, so as to facilitate the stacking of multiple filter assemblies.

[0044] This embodiment is further optimized, the liquid inlet chamber 3 and the permeated liquid chamber 4 are respectively located on two sides of the filter chamber 1 , and the liquid outlet chamber 5 and the permeated liquid chamber 4 are located on the same side of the filter chamber 1 .

[0045] Embodiment 2, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5A filter shown in the figure comprises at least one filter assembly, wherein a filter cavity 1 for installing a filter unit 2.22 and a plurality of cavities connected to the filter cavity 1 are provided in the filter assembly, wherein the cavity comprises a liquid inlet cavity 3 and a liquid permeation cavity 4, and liquid ports connected to each cavity are provided on the upper end face and the lower end face of the filter assembly, and the liquid ports connected to the same cavity are arranged opposite to each other, and a seal is provided on the outer end of the liquid port. There are multiple filter assemblies, and multiple filter assemblies are stacked and arranged, and the liquid ports on two adjacent filter assemblies correspond to each other and are sealed and connected through a seal. The liquid ports connected to the same cavity on the upper end face and the lower end face of the filter assembly are connected through a through hole, and the upper end of the through hole is connected to the upper end face of the filter assembly, and the lower end is connected to the lower end face of the filter assembly. When multiple filter assemblies are stacked and arranged, the through holes of two adjacent filter assemblies are connected, and the through holes make the liquid flow more smoothly, and the raw liquid to be filtered flows in each through hole and is evenly distributed to the filter cavity 1 of each filter assembly; the filtered liquid flows out through the liquid permeation cavity 4 to the corresponding through hole for discharge, so that the filtered liquid is discharged more smoothly.

[0046] Further, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the cavity also includes a liquid outlet cavity 5 for exhaust or reflux, and the liquid ports connected to the liquid outlet cavity 5 are arranged opposite to each other on the upper and lower end surfaces of the filter assembly. When the filter unit 2.22 uses forward flow filtering, the liquid port connected to the liquid outlet cavity 5 is used as an exhaust port; when the filter unit 2.22 uses tangential flow filtering, the liquid port connected to the liquid outlet cavity 5 is used as a reflux liquid port. This allows the filter assembly to satisfy forward flow filtering or tangential flow filtering.

[0047] Further, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a sealing groove is provided on the outer wall of the cover plate 11, a sealing member is located in the sealing groove, and the sealing groove is sleeved on the outer end of the liquid port. The sealing groove on the upper end surface is flush with the upper end surface of the cover plate 11, and the sealing groove on the lower end surface is flush with the lower end surface of the cover plate 11, so as to facilitate the stacking of multiple filter assemblies.

[0048] The basic structure is based on the first or second embodiment, and the filter assembly is further optimized. The filter assembly includes two cover plates 11 symmetrically arranged up and down, and the cover plates 11 are provided with mounting grooves 1.1. The mounting grooves 1.1 on the two cover plates 11 are matched to form a filter cavity 1. The filter cavity 1 is formed by matching the cover plates 11 symmetrically arranged up and down, so that the installation of the filter unit 2.22 is more convenient, the production of the parts of the filter assembly is more convenient, the number of molds required for production is reduced, and the production cost is reduced.

[0049] Further, such as Figure 2 , Figure 3 As shown, the cover plate 11 comprises a cover plate body 11.1 and a liquid plate arranged on the cover plate body 11.1, a cavity is formed between the liquid plate and the cover plate body 11.1, and the liquid port is located on the liquid plate. The liquid plate facilitates the formation of the cavity.

[0050] Further, such as Figure 2 , Figure 3 As shown, the liquid plate includes a liquid inlet plate 11.2 and a permeate plate 11.3, wherein the liquid inlet plate 11.2 and the cover plate body 11.1 form a liquid inlet cavity 3, and the permeate plate 11.3 and the cover plate body 11.1 form a permeate cavity 4. The liquid inlet 8 is located on the liquid inlet plate 11.2, and the permeate port 9 is located on the permeate plate 11.3.

[0051] Further, such as Figure 2 , Figure 3 As shown, the cover plate 11 also includes a liquid outlet plate arranged on the cover plate body 11.1, and a liquid outlet cavity 5 is formed between the liquid outlet plate and the cover plate body 11.1. The liquid outlet 10 is located on the liquid outlet plate. The liquid outlet plate and the permeate plate 11.3 are arranged separately or integrally. In the drawings, the liquid outlet plate is arranged integrally on the permeate plate 11.3 and is matched with the cover plate body 11.1 to form the liquid outlet cavity 5 and the permeate cavity 4.

[0052] This embodiment is further optimized, the liquid inlet plate 11.2 and the liquid permeate plate 11.3 are respectively located on both sides of the cover plate body 11.1, and the liquid permeate plate 11.3 and the liquid outlet plate are located on the same side of the cover plate body 11.1.

[0053] The basic structure is based on the first or second embodiment, and the filter assembly is further optimized. The filter assembly includes two cover plates 11 symmetrically arranged up and down, and the cover plates 11 are provided with mounting grooves 1.1. The mounting grooves 1.1 on the two cover plates 11 are matched to form a filter cavity 1. The filter cavity 1 is formed by matching the cover plates 11 symmetrically arranged up and down, so that the installation of the filter unit 2.22 is more convenient, the production of the parts of the filter assembly is more convenient, the number of molds required for production is reduced, and the production cost is reduced.

[0054] Furthermore, the cover plate 11 is provided with a liquid inlet groove and a permeate groove, and the liquid inlet grooves on the two cover plates 11 are matched to form the liquid inlet cavity 3, and the permeate grooves on the two cover plates 11 are matched to form the permeate cavity 4. The cover plate 11 only needs to be formed once, and when assembling the filter assembly, only the two cover plates 11 need to be matched and connected, which reduces the operation steps.

[0055] On the basis of the above embodiment, the filter cavity is further optimized, and a plurality of flow channels are arranged on the inner wall of the filter cavity, and the flow channels include a liquid inlet flow channel, a permeate flow channel and a liquid outlet flow channel, the liquid inlet flow channel is connected to the liquid inlet cavity, the permeate flow channel is connected to the permeate cavity, and the liquid outlet flow channel is connected to the liquid inlet cavity and the liquid outlet cavity. The flow channels are all arranged on the inner wall of the filter cavity and are connected to the inner wall of the filter cavity.

[0056] The filtering unit 2.22 is further described as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the filter unit 2.22 is provided with a liquid inlet hole 6, a permeable liquid hole 7 and a liquid outlet hole. The filter unit 2.22 includes a sealed shell 2.1 and a plurality of filter brackets arranged in the sealed shell 2.1. The filter bracket includes a first support plate 2.2.1 and a second support plate 2.2.2 arranged in a hollow manner. The first support plate 2.2.1 and the second support plate 2.2.2 are provided with a single-layer or multi-layer filter membrane 2.2.3 on both sides. A first cavity connected to the liquid inlet hole 6 is formed between the first support plate 2.2.1 and the filter membrane 2.2.3, and a second cavity connected to the permeable liquid hole 7 is formed between the second support plate 2.2.2 and the filter membrane 2.2.3. The first support plate 2.2.1, the second support plate 2.2.2 and the filter membrane 2.2.3 are arranged in a multi-layer stack, and the filter membrane 2.2.3 is provided with a liquid inlet hole 6 unit and a liquid permeation hole 7 unit; the hollow part of the first support plate 2.2.1 is connected with the liquid inlet hole 6, and the first support plate 2.2.1 is provided with a liquid permeation hole 7 unit, so that the fluid enters the hollow part of the first support plate 2.2.1 through the liquid inlet hole 6; the hollow position of the second support plate 2.2.2 is connected with the liquid permeation hole 7, and the second support plate 2.2.2 is provided with a liquid inlet hole 6 unit, so that the fluid after passing through the filter membrane 2.2.3 enters the hollow part of the second support plate 2.2.2, and then flows out of the liquid permeation hole 7. The first support plate 2.2.1 and the second support plate 2.2.2 can be support plates, or can be a filter membrane 2.2.3 that realizes the above working principle. The number of the first support plate 2.2.1, the second support plate 2.2.2 and the filter membrane 2.2.3 is adjusted according to the actual filtering requirements.

[0057] The first liquid-passing hole 1.2 and the second liquid-passing hole 1.3 are respectively provided on both sides of the filter chamber 1. The first liquid-passing hole 1.2 is connected to the liquid inlet chamber 3 and the liquid inlet hole 6, a part of the second liquid-passing hole 1.3 is connected to the liquid-permeable chamber 4 and the liquid-permeable hole 7, and another part of the second liquid-passing hole 1.3 is connected to the liquid-outlet chamber 5 and the liquid inlet hole 6. A part of the fluid is filtered through the first liquid-passing hole 1.2, the liquid inlet hole 6, the filter unit 2.22 in sequence, and flows out of the second liquid-passing hole 1.3 through the liquid hole 7. This part of the fluid is filtered; another part of the fluid is not filtered through the first liquid-passing hole 1.2, the liquid inlet hole 6, the filter unit 2.22 in sequence, and flows out of the second liquid-passing hole 1.3 through the liquid outlet hole. This part of the fluid is exhausted or refluxed.

[0058] Both sides of the filter unit 2.22 are provided with a liquid inlet hole 6 and a liquid permeation hole 7, and the liquid inlet holes 6 and liquid permeation holes 7 on either side of the filter unit 2.22 are arranged at intervals. The liquid inlet holes 6 and liquid permeation holes 7 on both sides of the filter unit 2.22 are symmetrically arranged. This makes the filter unit 2.22 have no left or right distinction, and can be installed in the filter chamber 1 in both the left and right directions. It is easy to operate and has an error-proofing function.

[0059] A plurality of flow channels 12 are provided on the inner wall of the filter chamber 1. The flow channels 12 include a liquid inlet flow channel 12.1, a permeate flow channel 12.2 and a liquid outlet flow channel 12.3. One end of the liquid inlet flow channel 12.1 is communicated with a liquid inlet hole 6 on the filter unit 2.22 that is connected to the liquid inlet chamber 3, and the other end is communicated with a liquid inlet hole 6 on the filter unit 2.22 that is close to the permeate chamber 4; one end of the permeate flow channel 12.2 is communicated with a permeate hole 7 on the filter unit 2.22 that is connected to the permeate chamber 4, and the other end is communicated with a permeate hole 7 on the filter unit 2.22 that is close to the liquid inlet chamber 3; one end of the liquid outlet flow channel 12.3 is communicated with a liquid inlet hole 6 on the filter unit 2.22 that is connected to the liquid inlet chamber 3, and the other end is communicated with a liquid inlet hole 6 on the filter unit 2.22 that is connected to the liquid outlet chamber 5. The inlet flow channel 12.1, the permeate flow channel 12.2 and the outlet flow channel 12.3 are evenly distributed on the symmetrical two side walls of the filter chamber 1, so that the pressure on the front and back sides of the filter unit 2.22 is uniform. The outlet flow channel 12.3 dilutes the macromolecular concentration of the fluid after flushing the filter membrane 2.2.3 through the original fluid to prevent the accumulation of macromolecules in the second liquid hole 1.3.

[0060] The sealing housing 2.1 comprises a sealing frame 2.1.1 which penetrates from top to bottom and sealing gaskets 2.1.2 which are arranged on the upper and lower surfaces of the sealing frame 2.1.1. The filter unit 2.22 is located in the cavity surrounded by the two sealing gaskets 2.1.2 and the sealing frame 2.1.1. The sealing gasket 2.1.2 is pressed between the sealing frame 2.1.1 and the inner wall of the filter cavity 1. The sealing gasket 2.1.2 allows the fluid to flow only from the liquid inlet hole 6 or the liquid permeation hole 7. The central axis of the liquid inlet hole 6 of the filter unit 2.22 is perpendicular to the filter membrane 2.2.3, and the central axis of the liquid permeation hole 7 of the filter unit 2.22 is perpendicular to the filter membrane 2.2.3.

[0061] The specific embodiments described above are only preferred implementations of the present invention, and are not intended to limit the specific implementation scope of the present invention. All equivalent changes made in accordance with the shape and structure of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter, characterized in that: The invention comprises at least one filter assembly, wherein a filter cavity for installing a filter unit and a plurality of cavities connected with the filter cavity are provided in the filter assembly, wherein the cavity comprises a liquid inlet cavity and a liquid permeation cavity, and liquid ports connected with each cavity are provided on the upper end surface and the lower end surface of the filter assembly, and the liquid ports connected with the same cavity are arranged opposite to each other, and a sealing member is provided on the outer end sleeve of the liquid port.

2. A filter according to claim 1, characterized in that: There are multiple filter assemblies, which are stacked and arranged. The liquid ports on two adjacent filter assemblies correspond to each other one by one and are sealed and connected by a sealing member.

3. A filter according to claim 2, characterized in that: The liquid ports on the upper and lower end surfaces of the filter assembly that are connected to the same cavity are connected through a through hole, the upper end of the through hole is connected to the upper end surface of the filter assembly, and the lower end is connected to the lower end surface of the filter assembly.

4. A filter according to claim 1, 2 or 3, characterized in that: The cavity also includes a liquid outlet cavity for exhaust or reflux, and liquid ports connected to the liquid outlet cavity are arranged opposite to each other on the upper end surface and the lower end surface of the filter assembly.

5. A filter according to claim 4, characterized in that: The filter assembly comprises two cover plates symmetrically arranged up and down, the cover plates are provided with mounting grooves, and the mounting grooves on the two cover plates are matched to form a filter cavity.

6. A filter according to claim 5, characterized in that: The cover plate comprises a cover plate body and a liquid plate arranged on the cover plate body, a cavity is formed between the liquid plate and the cover plate body, and the liquid port is located on the liquid plate.

7. A filter according to claim 6, characterized in that: The liquid plate comprises a liquid inlet plate and a liquid permeation plate. A liquid inlet cavity is formed between the liquid inlet plate and the cover plate body, and a liquid permeation cavity is formed between the liquid permeation plate and the cover plate body.

8. A filter according to claim 7, characterized in that: The cover plate further comprises a liquid outlet plate arranged on the cover plate body, and a liquid outlet cavity is formed between the liquid outlet plate and the cover plate body.

9. A filter according to claim 5, characterized in that: The cover plate is provided with a liquid inlet groove and a permeate liquid groove. The liquid inlet grooves on the two cover plates are matched to form a liquid inlet cavity, and the permeate liquid grooves on the two cover plates are matched to form a permeate liquid cavity.

10. A filter according to claim 4, characterized in that: A plurality of flow channels are arranged on the inner wall of the filter cavity, and the flow channels include a liquid inlet flow channel, a permeate flow channel and a liquid outlet flow channel. The liquid inlet flow channel is connected to the liquid inlet cavity, the permeate flow channel is connected to the permeate cavity, and the liquid outlet flow channel is connected to the liquid inlet cavity and the liquid outlet cavity.

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