Filter unit, filter assembly and filter

Abstract

According to the filtering unit, a first end face and a second end face are divided into a plurality of first areas and a plurality of second areas in a zoning mode, correspondingly, a first filtering membrane and a second filtering membrane are also respectively divided into a plurality of liquid passing areas, the membrane area of each liquid passing area is reduced, and the membrane area of each liquid passing area is reduced. The compression strength of the filter membrane is favorably improved, and the filter membrane can be used for high-pressure-difference and high-flux filtering working conditions; meanwhile, by arranging the first communication channel and the second communication channel, the filtrate in the second partition can flow to the first partition and then flow into the second communication channel, and the filtrate in the first partition directly flows to the outflow channel through the second communication channel; the phenomenon that the filtrate flows back and forth between the two end faces for multiple times and the phenomenon that two streams of filtrate with the equivalent flow and the high flow value flow oppositely between the two end faces do not occur any more, energy loss caused by filtrate collision is reduced, the filtrate can be rapidly discharged out of a channel, and the requirement for high circulation is further met.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, and particularly relates to a filtration unit, a filtration component and a filter. Background Art

[0002] One embodiment of US4501663A discloses a membrane filter unit, which includes a filter membrane and a one-piece support. The one-piece support includes two end faces and a central opening 134. The two end faces respectively have a joint area 122 and 124 located on the outer circumference, a joint area 126 and 128 located on the inner circumference, and ribs 130 and 132 located between the inner circumference and the outer circumference. The joint areas and the ribs on the two end faces are respectively sealed and connected to corresponding areas of a filter membrane. Filtrate flow channels are respectively formed between adjacent ribs 130 and between adjacent ribs 132; the ribs 130 and 132 are regularly spaced apart on the end face of the support, and the extending directions of the two are at a 90° angle. The filtrate flow channels between adjacent ribs 132 and the filtrate flow channels between adjacent ribs 130 communicate with each other at the intersection. More specifically, that is, the bottoms of the filtrate flow channels between adjacent ribs 130 and the bottoms of the filtrate flow channels between adjacent ribs 132 are directly communicated at the intersection; the central opening 134 is isolated from the filter membrane by an inner circumferential ridge 138 and a ridge 126, and the inner circumferential ridge 138 is radially offset and located within the ridge 126. As can be seen from Figure 15-1 7, the radially inner ends 132' of some ribs 132 extend through the gap between the ridge 138 and the ridge 126, and axially penetrate the support to provide a liquid channel connecting the filtrate flow channel and the central opening 134.

[0003] As can be seen from the attached drawings of the prior art Figure 15 , a plurality of ribs 132 are arranged in parallel and at intervals. The two ends of some ribs 132 are connected to the joint area 124 on the outer circumference, and the two ends of some ribs 132 are connected to the joint area 124 on the outer circumference and the joint area 128 on the inner circumference. At the same time, the filter membrane is sealed and connected to the ribs 132, so that independent filtrate flow channels are formed between adjacent ribs 132. The liquid channel 132' is located radially between the ridge 138 and another ridge on the opposite end face. Only the filtrate flow channels between some adjacent ribs 132 are directly communicated with the liquid channel 132'. Therefore, only the filtrate in the filtrate flow channels between the part of adjacent ribs 132 can directly flow into the central opening 134 through the liquid channel 132'; as can be seen from Figure 16 , a plurality of ribs 130 are arranged in parallel and at intervals. The two ends of some ribs 130 are connected to the joint area 122 on the outer circumference, and the two ends of some ribs 130 are connected to the joint area 122 on the outer circumference and the joint area 126 on the inner circumference. At the same time, the filter membrane is sealed and connected to the ribs 130, so that independent filtrate flow channels are formed between adjacent ribs 130.

[0004] The fluid flow path of this membrane filter unit is relatively complex.

[0005] On the end face where the rib 132 is located, the filtrate in the filtrate flow channel between adjacent ribs 132 that is not partially connected to the liquid channel 132' must first flow radially outward along the rib 132 to reach the area near the joint zone 124, then flow to the axially opposite area on the other end face, and enter the filtrate flow channel between the corresponding adjacent ribs 130, and then flow inward to reach the area axially opposite to the adjacent rib 132 connected to the liquid channel 132', and then flow to the end face where the rib 132 is located, enter the filtrate flow channel between some adjacent ribs 132 connected to the liquid channel 132', and then flow into the central opening 134 through the liquid channel 132'.

[0006] On the end face where the rib 130 is located, the filtrate between some ribs 130 whose two ends are connected to the joint zone 122 on the outer circumference, and the filtrate between some ribs 130 whose two ends are connected to the joint zone 122 on the outer circumference and the joint zone 126 on the inner circumference also first flow to the end face where the rib 132 is located, enter the filtrate flow channel between the adjacent ribs 132 connected to the liquid channel 132', directly enter the liquid channel 132', and then flow into the central opening 134; the filtrate between the remaining ribs 130 whose two ends are connected to the joint zone 122 on the outer circumference and the joint zone 126 on the inner circumference must first reach the end face where the rib 132 is located through the filtrate flow channel, then flow outward along the rib 132 to reach the position near the joint zone 124, and then return to the area near the joint zone 122 on the end face where the rib 130 is located, enter the filtrate flow channel between some ribs 130 whose two ends are connected to the joint zone 122 on the outer circumference, then flow inward to reach the area axially opposite to the adjacent rib 132 connected to the liquid channel 132', flow to the end face where the rib 132 is located, enter the filtrate flow channel connected to the liquid channel 132' and flow along the rib 132, and finally enter the central opening 134 through the liquid channel 132'.

[0007] It can be seen from this that from the formation of the filtrate on the two end faces, entering the filtrate flow channel, to flowing into the central opening 134, most of the filtrate needs to flow back and forth between the two end faces of the support member multiple times, and needs to flow inward or outward along the rib 130 or 132 to adjust its position on the end face, and finally flow into the filtrate flow channel between the adjacent ribs 132 connected to the liquid channel 132'. The overall flow path is complex and long.

[0008] When the membrane filter unit provided by this embodiment is used in high-pressure-difference and high-throughput filtration conditions, some problems will occur: (1) Since most of the filtrate at both end faces needs to flow towards the opposite end face during the process of flowing into the central opening 134, that is, the filtrate at the end face where the rib 132 is located needs to flow towards the end face where the rib 130 is located, and the filtrate at the end face where the rib 130 is located needs to flow towards the end face where the rib 132 is located. This will cause the filtrate at both end faces to flow towards each other at the same position, generating a flow impact. Moreover, the flow rates of these two streams of filtrate flowing towards each other are quite equal and the flow rate values are also high. The opposite-flowing filtrate generates a flow impact, resulting in a large amount of energy loss, leading to a significant decrease in the discharge rate of the filtrate and failing to meet the high-throughput filtration requirements; (2) The opposite-flowing impact is also likely to cause bubbles in the filtrate, and the bubbles block the filtrate flow channel, further reducing the discharge speed of the filtrate; (3) Most of the filtrate needs to flow back and forth between the filtrate flow channels at both end faces multiple times during the process of reaching the central opening. The multiple back-and-forth flows of the filtrate between the filtrate flow channels at both end faces will also cause a large amount of energy loss, which further exacerbates the decrease in the discharge rate of the filtrate.

[0009] In the filtration unit provided by other embodiments of this prior art, such as Figure 10 and 11 shown, the components 50 and 52 are joined together to form an integral support member 88, and a filter membrane 68 is hermetically fixed on each of the opposite end faces of the components 50 and 52. This form of support member simplifies the fluid flow path to a certain extent. However, since it is necessary to join the components 50 and 52 together to form an integral support member 88, it increases the thickness of a single filtration unit to a certain extent. The thickness of a single filtration unit is close to twice the thickness of the filtration unit in the previous embodiment. This results in a reduction in the number of filtration units that can be accommodated in the same housing volume, a decrease in the available filtration area, and the available filtration rate is still relatively small, unable to meet the high-throughput filtration requirements. Moreover, it is also necessary to join the components 50 and 52 together to ensure that the corresponding flow channels and welding ribs are aligned, increasing the manufacturing difficulty of the filtration unit.

[0010] More importantly, in the above two types of filtration units, in order to achieve high-throughput filtration, the common practice is to increase the pressure on the upstream side of the filter membrane so as to form a relatively high pressure difference between the upstream and downstream surfaces of the filter membrane. In actual operation, at 25°C, the maximum positive pressure difference can reach 0.4 MPa. During the filtration process, the liquid inlet is generally stopped by closing the valve upstream of the filter to temporarily stop filtration. However, there are cases of misoperation, that is, the operator mistakenly closes the downstream valve. The fluid will accumulate on the downstream side of the filter membrane, and the pressure on the downstream side of the filter membrane will increase. The pressure on the upstream side is balanced by the exhaust valve. Due to the originally large flux, the pressure on the downstream side of the filter membrane will increase sharply and be significantly higher than the upstream pressure. The maximum reverse pressure difference can reach 0.07 MPa, which will damage the filter membrane. In addition, if the downstream valve is suddenly and quickly closed, the water hammer effect formed by the high-flow filtrate flowing back and forth in the closed system formed by the downstream side of the filter membrane and the downstream valve will also damage the filter membrane.

[0011] Therefore, for the filtration conditions of high pressure difference and high throughput, the pressure resistance of the filter membrane should also be considered to be improved to avoid premature rupture of the filter membrane.

[0012] In the existing filtration unit, due to the structural defects of the support member, there are problems such as complex fluid flow paths, long flow paths, and small membrane area provided by the filtration unit of the same volume, resulting in the inability to provide a high filtration rate, not meeting the requirements of high-throughput filtration, and the filter membrane being prone to rupture under high pressure difference and high throughput. Summary of the Utility Model

[0013] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a filtration unit, a filtration assembly and a filter, which solve the problems that the existing membrane filter unit cannot meet the requirements of high-throughput filtration and the filter membrane is prone to rupture under the filtration conditions of high pressure difference and high throughput.

[0014] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0015] A filtration unit includes a support member and a filter membrane;

[0016] The support member has an outflow channel, a first end face and a second end face, the first end face and the second end face are axially opposite, and the outflow channel axially penetrates the first end face and the second end face;

[0017] The filter membrane includes a first filter membrane hermetically connected corresponding to the first end face and a second filter membrane hermetically connected corresponding to the second end face;

[0018] The first end face has a plurality of first partitions, the boundaries of the first partitions are sealingly connected to corresponding regions of the first filter membrane, the first filter membrane has first liquid-permeable regions corresponding to the respective first partitions, the second end face has a plurality of second partitions, the boundaries of the second partitions are sealingly connected to corresponding regions of the second filter membrane, and the second filter membrane has second liquid-permeable regions corresponding to the respective second partitions;

[0019] The support member further has a plurality of first communication channels and a plurality of second communication channels. The first communication channels connect the axially opposite first partitions and second partitions of the first end face and the second end face. On the side of the first end face, the first partition is in communication with the second communication channels, and the second communication channels are in communication with the outflow channel. On the side of the second end face, the second partition is disconnected from the second communication channels.

[0020] In the filtration unit of the present utility model, the first end face is divided into a plurality of first partitions, and the boundaries of the first partitions are sealingly connected to corresponding regions of the first filter membrane. That is, the first liquid-permeable regions on the first filter membrane that are pressured to permeate liquid correspond to the first partitions, and other regions are sealingly supported by the first end face and cannot permeate liquid. Similarly, the second end face is divided into a plurality of second partitions, and the boundaries of the second partitions are sealingly connected to corresponding regions of the second filter membrane. That is, the second liquid-permeable regions on the second filter membrane that are pressured to permeate liquid correspond to the second partitions, and other regions are sealingly supported by the second end face and cannot permeate liquid. Thus, the first filter membrane and the second filter membrane are also respectively divided into a plurality of liquid-permeable regions, and the membrane area of each liquid-permeable region is small, and the pressure resistance strength is improved, which is beneficial to improving the overall pressure resistance strength of the filter membrane and can be used in high-pressure difference and high-throughput filtration conditions. Even if a relatively large reverse pressure appears on the downstream side of the filter membrane, it will not rupture.

[0021] At the same time, the filtrate formed through the first filter membrane will flow to the first partitions on the first end face. Since the boundaries of the first partitions are sealingly connected to corresponding regions of the first filter membrane, the filtrate will not flow between the respective first partitions, but directly flows through the second communication channels to the outflow channel. At least most of the filtrate formed through the second filter membrane will flow to the second partitions on the second end face. Since the boundaries of the second partitions are sealingly connected to corresponding regions of the second filter membrane, the filtrate will not flow between the respective second partitions. At the same time, since the second communication channels are disconnected from the second partitions, the filtrate in the second partitions cannot directly flow into the second communication channels either. Thus, there will be no situation where two filtrates with comparable flow rates and relatively high flow rate values flow into the second communication channels in opposite directions. The filtrate in the second partitions first reaches the corresponding first partitions through the first communication channels, and then mixes with the filtrate on the first end face and flows into the second communication channels in the same direction, and then flows into the outflow channel.

[0022] The above-mentioned filtrate flow path is such that the filtrate in each first partition directly flows into the second communication channel and then into the outflow channel, while the filtrate in the second partition first flows into the first partition through the first communication channel, and then flows from the first partition into the second communication channel and then into the outflow channel. There is no longer a phenomenon that the filtrate flows back and forth between the two end faces multiple times. The overall flow path is simplified and the length of the flow path is greatly shortened, resulting in low energy loss. Also, since only the filtrate at the second end face flows through the first communication channel to the first end face, there is almost no longer a phenomenon that two filtrates with comparable and relatively high flow rates flow towards each other between the two end faces, basically eliminating the flow impact caused by the high-intensity countercurrent flow. Therefore, the energy loss is further reduced, and there will be no more bubbles generated, which has little impact on the flow rate of the filtrate and meets the requirements of high throughput.

[0023] In summary, in the filtration unit provided by the present application, by dividing the two end faces of the support member into multiple partitions, the filter membrane is correspondingly formed into multiple smaller liquid-permeable areas. The boundaries of each liquid-permeable area are fixed to the support member, and each liquid-permeable area is independent of each other, improving the overall pressure resistance of the filter membrane and avoiding premature rupture of the filter membrane under high-pressure difference conditions, meeting the filtration requirements of high-pressure difference and high throughput. Moreover, the first communication channel and the second communication channel are provided to match the partitions to form corresponding fluid flow paths. Compared with the existing filtration unit, the fluid flow path matching the partitions is greatly simplified and the length is significantly shortened as a whole. For the same volume of the filtration unit, a larger filtration area can be provided, or, when providing the same filtration area, the volume of the filtration unit is smaller. Also, the phenomenon that the filtrate flows back and forth between the two end faces multiple times and the phenomenon that two filtrates with comparable and relatively high flow rates flow towards each other between the two end faces no longer occur, and the kinetic energy loss of the filtrate is greatly reduced. Thus, the filtration unit can provide a higher filtrate discharge rate and meet the filtration requirements of high throughput.

[0024] Preferably, the second end face has a partition portion that isolates the second partition from the second communication channel, and the partition portion forms a sealed connection with the corresponding area of the second filter membrane.

[0025] The function of the partition portion is, on the one hand, to isolate the second partition and the second communication channel, preventing the filtrate in the second partition from directly flowing into the second communication channel and forming a countercurrent flow with the filtrate in the first partition flowing into the second communication channel, thereby generating a flow impact. This ensures that the filtrate in the second partition can only first flow through the first communication channel to the corresponding first partition and merge into the second communication channel in the same direction as the filtrate in the first partition, reducing energy loss and the generation of bubbles, and being suitable for high-throughput working conditions. On the other hand, the partition portion can further increase the sealing area between the second filter membrane and the second end face, reducing the filter membrane area corresponding to each partition, so as to improve the pressure resistance of the filter membrane corresponding to each partition and be suitable for high-pressure difference working conditions.

[0026] Preferably, the partition part is a partition plate, which includes multiple pieces. The partition plate is strip-shaped, encloses the corresponding area of the second communication channel on the second end surface, and is hermetically connected to the corresponding area of the second filter membrane;

[0027] The second communication channel includes a first opening and a second opening on the first end surface, and a cavity formed between the partition plate and the first end surface;

[0028] On the first end surface, the first opening and the second opening are disconnected. The first opening communicates with the first communication channel, and the second opening communicates with the outflow channel.

[0029] The partition plate can increase the sealing area between the second filter membrane and the second end surface, reduce the filter membrane area in each partition, and improve the pressure resistance of the filter membrane in each partition; at the same time, the partition plate can completely enclose the corresponding area of the second communication channel on the second end surface, so that all the filtrate formed on the second filter membrane can only flow through the first communication channel to the first partition, and merge into the second communication channel in the same direction as the filtrate in the first partition, completely preventing the occurrence of the phenomenon of two streams of filtrate flowing in opposite directions and mixing. The kinetic energy loss is reduced to the lowest level. The filtrate mixed in the first partition enters the cavity of the second communication channel through the first opening formed on the first end surface, and then flows into the outflow channel through the second opening of the second communication channel.

[0030] Preferably, the partition part is partition ribs arranged adjacent to the second communication channel, which includes multiple pieces. The partition ribs are hermetically connected to the second filter membrane;

[0031] The second communication channel includes a first opening, a second opening and a third opening. The first opening and the second opening are on the first end surface, and on the first end surface, the first opening and the second opening are disconnected. The first opening communicates with the first communication channel, and the second opening communicates with the outflow channel;

[0032] The third opening is on the second end surface and is located between two adjacent partition ribs.

[0033] The partition ribs can increase the sealing area between the second filter membrane and the second end face, and divide the second filter membrane into more partitions that can filter the filtrate. The filter membrane area corresponding to each partition is smaller, which improves the pressure resistance of the filter membrane in each partition. Most of the filtrate on the second end face flows through the first communication channel in the second partition to the corresponding first partition, and flows into the second communication channel together with the filtrate in the first partition, and then flows into the outflow channel together. A small amount of filtrate will also be formed in the corresponding area of the second filter membrane corresponding to the third opening. However, since the area of the third opening is much smaller than that of the first partition, the flow rate of the filtrate flow formed in the corresponding area of the second filter membrane corresponding to the third opening is small. This small-flow filtrate will flow into the second communication channel in the direction of the first end face, while the filtrate in the first partition will flow into the second communication channel in the direction of the second end face. Although in this embodiment, two opposite flows of fluid are formed at both ends of the second communication channel, due to the very small area of the region of the filter membrane corresponding to the third opening, the flow rate flowing into the second communication channel from the second end face to the first end face is very small. Therefore, no strong opposite-flow impact will be formed, no excessive energy loss will occur, and the influence on the flow rate can be ignored.

[0034] Preferably, the outflow channel is located at the center of the support member. The support member further includes a plurality of sealing ribs extending radially. The sealing ribs are circumferentially spaced around the outflow channel.

[0035] On the first end face side, an annular first inner sealing area and an annular first outer sealing area are further included around the outflow channel. The sealing rib includes a first surface. The first partition is located between the first surfaces of two adjacent sealing ribs, and is located radially outside the first inner sealing area and radially inside the first outer sealing area. The first filter membrane is respectively sealed and connected to the first inner sealing area, the first outer sealing area, and the first surface. The first opening of the second communication channel and the first communication channel are both located in the first partition, and the first opening of the second communication channel is located at the circumferential two boundaries of the first partition.

[0036] and / or

[0037] On the second end face side, an annular second inner sealing area and an annular second outer sealing area are further included around the outflow channel. The partition part extends radially. The second partition is located between adjacent partition parts, and is located radially outside the second inner sealing area and radially inside the second outer sealing area. The second filter membrane is respectively sealed and connected to the second inner sealing area, the second outer sealing area, and two adjacent partition parts. The first communication channel is located in the second partition, and the second communication channel is located outside the second partition.

[0038] The outflow channel is arranged at the center of the support member, facilitating communication with each second communication channel. Meanwhile, it is beneficial to shorten the distance from the second communication channel to the outflow channel, shorten the path of the filtrate flowing to the outflow channel, and reduce the energy loss of the filtrate during the flow process.

[0039] For the first end face, the first inner sealing area and the first outer sealing area respectively support and seal the outer periphery and the inner periphery of the first filter membrane, while the first surface of the radially extending sealing rib supports and seals a partial radial area of the first filter membrane, making the pressure resistance performance of the first filter membrane better. Meanwhile, the sealing rib divides the first end face and the first filter membrane into several non-communicating areas respectively. The first partition and the first liquid passing area are located in the corresponding areas respectively. At the same time, the first opening of the second communication channel and the first communication channel are both located in the first partition, so that the filtrate formed through the first filter membrane can directly flow into the first opening of the second communication channel, and at least most of the filtrate formed through the second filter membrane can flow into the first partition through the first communication channel; in addition, the first opening is arranged at the circumferential two boundaries of the first partition, that is, the first openings are respectively arranged at the circumferential two boundaries of the first partition, which is beneficial to shunt the large amount of filtrate flowing into the first partition, thereby promoting the filtrate to quickly enter the outflow channel through the second communication channel, and is applicable to the working condition of high flux.

[0040] For the second end face, the second inner sealing area and the second outer sealing area respectively support and seal the outer periphery and the inner periphery of the second filter membrane, while the radially extending partition supports and seals a partial radial area of the second filter membrane, making the pressure resistance performance of the first filter membrane better. Meanwhile, the partition divides the second end face and the second filter membrane into several non-communicating areas respectively. The second partition and the second liquid passing area are located in the corresponding areas respectively. At the same time, the first communication channel is located in the second partition, and the first partition and the second partition are arranged correspondingly. At least most of the filtrate formed through the second filter membrane can flow into the corresponding first partition through the first communication channel after entering the second partition. At the same time, the second communication channel is located outside the second partition. Blocked by the partition and the second filter membrane, the filtrate entering the second partition cannot directly enter the second communication channel, thus ensuring that the flow direction of the filtrate is stable and controllable, and avoiding the situation where two filtrates with equivalent flow rates and relatively high flow rate values flow in opposite directions.

[0041] Preferably, the first opening and the second opening of the second communication channel on the first end face are isolated by the first inner sealing area. The first opening is located in the first partition between the first inner sealing area and the first outer sealing area, and the second opening is located radially inside the first inner sealing area;

[0042] and / or,

[0043] When the partition is a partition rib, the third opening of the second communication channel on the second end face is located between the second inner sealing area and the second outer sealing area.

[0044] The outflow channel needs to be in communication with the outside. The function of the first inner sealing area is also to isolate the first partition from the outflow channel, and the function of the second inner sealing area is also to isolate the second partition from the outflow channel, defining the overall flow direction of the filtrate on the first end face and the second end face, preventing the filtrate on the first end face and the second end face from flowing randomly and colliding with each other, resulting in energy loss and bubble generation. Moreover, due to the position of the second opening, the second communication channel can be in communication with the outflow channel, enabling the filtrate aggregated into the second communication channel through the first opening and / or the third opening to quickly flow to the outflow channel through the second opening.

[0045] Preferably, when the partition part is a partition plate, it includes two sub-plates located on the circumferential two sides of the sealing rib. One circumferential side of the sub-plate is connected to one circumferential side of the second partition, and the other circumferential side is connected to the sealing rib.

[0046] Based on the above structure, the partition plate stably connects the second inner sealing area, the second outer sealing area, and between the second partition and the sealing rib. On the one hand, it enhances the structural strength of the support plate. On the other hand, it can always cover the corresponding area of the second communication channel on the second end face under the working condition of high pressure difference, preventing the filtrate on the second end face from directly flowing into the second communication channel; the two sub-plates correspond to the two second communication channels and respectively correspond to the circumferential boundary areas of two adjacent first partitions, increasing the flow area from the first partition to the outflow channel, so that the filtrate can flow to the outflow channel faster, meeting the high-throughput filtration requirements.

[0047] Preferably, when the partition part is a partition plate, the axial thickness of the partition plate is H1, and the axial thickness of the sealing rib is H2, satisfying the following condition: H1 is not greater than 0.5H2, to prevent the partition plate from being too thick and making the volume of the cavity of the second communication channel too small, so that the filtrate cannot flow quickly from the cavity to the second opening. Controlling the thickness of the partition plate can ensure the flow area and outflow rate of the filtrate in the cavity.

[0048] Preferably, when the partition part is a partition rib, it includes two sub-ribs spaced on the circumferential two sides of the sealing rib. One circumferential side of the sub-rib is connected to one circumferential side of the second partition, and the third opening of the second communication channel is located between the sub-rib and the sealing rib. The second filter membrane forms a third liquid passing area corresponding to each of the third openings.

[0049] There is a second communication channel between each of the two filtrate-distributing ribs and the sealing rib, and the two second communication channels respectively correspond to two adjacent first partitions, increasing the filtrate flow path from the first partition to the outflow channel. Each first partition communicates with two circumferential second communication channels, so that the filtrate in each first partition can flow to the outflow channel faster, which is applicable to high-throughput working conditions. Moreover, the separating rib further divides a smaller third liquid-passing area on the second filter membrane. The filter membrane area corresponding to the third liquid-passing area is smaller, and the pressure resistance performance is better, which is applicable to high-pressure difference working conditions. The second filter membrane also forms filtrate through the third liquid-passing area, improving the utilization rate of the filter membrane. Since the area of the third opening is much smaller than that of the first partition and the second partition, the filtrate formed in the corresponding third liquid-passing area is also less, and the corresponding flux is also smaller, with a large gap from the filtrate flux entering through the first opening. Therefore, although the filtrate entering the third opening will flow in the opposite direction to the filtrate entering the first opening, it will not form a strong opposite impact and mixing, and will not cause excessive energy loss, having little impact on the flow rate.

[0050] Preferably, on the second end face, the sealing rib includes a second surface. When the separating part is a separating plate, the end face of the separating plate is flush with the second surface, and the second filter membrane is hermetically connected to the end face of the separating plate and the second surface; or when the separating part is a separating rib, the surface of the separating rib is flush with the second surface, and the second filter membrane is hermetically connected to the surface of the separating rib and the second surface.

[0051] When the second surface of the sealing rib is flush with the end face of the separating plate or the separating rib, it is beneficial to ensure the flatness of the filter membrane, so that the area of the second filter membrane corresponding to the sealing rib will not be suspended, and it is not easy to be damaged under high-pressure difference working conditions, ensuring the service life of the filter membrane and the filtering unit.

[0052] Preferably, the first end face has several groups of circumferentially distributed first arc-shaped ribs. Each group of first arc-shaped ribs is located between adjacent sealing ribs, and is located between the radial outside of the first inner sealing area and the radial inside of the first outer sealing area. Several first arc-shaped ribs in each group are radially spaced apart. Several first partitions and several first arc-shaped ribs are alternately arranged in the radial direction. The end face of each first arc-shaped rib is flush with the first surface and is hermetically connected to the first filter membrane. The circumferential two ends of each first arc-shaped rib are respectively connected to the corresponding sealing ribs on both sides. The first openings of the first communication channel and the second communication channel are correspondingly arranged between the radially adjacent first arc-shaped ribs, between the first arc-shaped rib and the first inner sealing area, and between the first arc-shaped rib and the first outer sealing area;

[0053] The function of the first arc-shaped rib is to further reduce the area of a single first partition. Correspondingly, it also further divides the first filter membrane, making the area of a single first liquid passage area smaller. Thus, the pressure resistance performance of each liquid passage area of the first filter membrane is better. In addition, the first partition is located between adjacent first arc-shaped ribs, and the side wall of the first arc-shaped rib can play a role in guiding the filtrate. The first openings of the first communication channel and the second communication channel are correspondingly arranged between the radially adjacent first arc-shaped ribs, which means that there are respectively a first opening of the first communication channel and a first opening of the second communication channel between adjacent first arc-shaped ribs, that is, one first partition corresponds to two first openings of the first communication channel and the second communication channel. The first communication channel is located in the middle of the first partition, and the two first openings are respectively located at the circumferential two boundaries of the first partition. Thus, the correspondence between the first partition and the second partition is improved. After entering the first partition, the filtrate will be clearly guided to the corresponding two openings of the second communication channel, further clarifying the flow path of the filtrate, avoiding the interference and impact of the filtrate on each other during flow, causing energy loss, being beneficial to improving the filtrate flow rate, and being applicable to high-throughput working conditions.

[0054] Preferably, the second end face has several groups of circumferentially distributed second arc-shaped ribs. Each group of first arc-shaped ribs is located between adjacent partition parts, and is located between the radially outer side of the second inner sealing area and the radially inner side of the second outer sealing area. The several second arc-shaped ribs in each group are radially spaced apart. The several second partitions and the several second arc-shaped ribs are alternately arranged in the radial direction, and the end face of each second arc-shaped rib is flush with the end face of the partition part and is hermetically connected to the second filter membrane. The circumferential two ends of each second arc-shaped rib are respectively connected to the partition parts on the corresponding sides. The first communication channel is correspondingly located between the radially adjacent second arc-shaped ribs, between the second arc-shaped rib and the second inner sealing area, and between the second arc-shaped rib and the second outer sealing area.

[0055] The function of the second arc-shaped rib is to further reduce the area of a single second partition. Correspondingly, it also further divides the second filter membrane, making the area of a single second liquid passage area smaller. Thus, the pressure resistance performance of each liquid passage area of the second filter membrane is better. In addition, the second partition is located between adjacent second arc-shaped ribs, and the side wall of the second arc-shaped rib can play a role in guiding the filtrate. The first communication channel is correspondingly located between the radially adjacent second arc-shaped ribs, which means that there is a first communication channel between adjacent second arc-shaped ribs. There is only one first communication channel for one second partition. The filtrate entering the second partition can only enter the corresponding first partition through the corresponding first communication channel, further clarifying the flow path of the filtrate, avoiding the interference and impact of the filtrate on each other during flow, causing energy loss, being beneficial to improving the filtrate flow rate, and being applicable to high-throughput working conditions.

[0056] In order to achieve the above object, the present invention also adopts the following technical solutions:

[0057] A filtering component includes several filtering units of the above embodiments. The multiple filtering units are hermetically stacked axially up and down, and the outflow channels of each filtering unit are hermetically connected to form an integral liquid outlet channel. A plurality of support blocks are circumferentially spaced on the outer peripheral wall of the support member of the filtering unit, and the axial end faces of the support blocks of adjacent filtering units abut against each other or are connected to form an inlet channel between adjacent filtering units.

[0058] Through the way of hermetically stacking up and down, the above filtering component combines multiple filtering units and forms an inlet channel and an outlet channel between the filtering units, greatly improving the filtering rate. Specifically, the outflow channels of adjacent filtering units are stacked and sealed with each other by wire bonding. The second opening of the second communication channel is located radially inside the wire bonding, so that the filtrate in the second communication channel can quickly enter the outlet channel. The area of the second opening of the second communication channel is small, avoiding the backflow of the filtrate back into the filtering unit, causing flow impact and energy loss. On the one hand, the support blocks of adjacent filtering units can improve the connection stability between the filtering units and are suitable for working conditions with high pressure differences. On the other hand, they can also increase the axial distance between adjacent filtering units to form an inlet channel, and the feed liquid can quickly enter the inlet channel, and then quickly form filtrate, enter the outflow channel through the first communication channel and the second communication channel, and converge in the outlet channel, which is suitable for high-throughput working conditions.

[0059] To achieve the above object, the present utility model also adopts the following technical solution:

[0060] A filter includes a housing and also includes the above filtering component. The filtering component is hermetically assembled in the housing, and the inlet channel and the outlet channel are respectively communicated with the inlet port and the outlet port on the housing to form an inlet path and an outlet path.

[0061] In summary, compared with the prior art, the present utility model at least has the following beneficial effects:

[0062] In the filtration unit provided by the present application, by dividing the two end faces of the support member into multiple partitions, the filter membrane is correspondingly formed into multiple smaller liquid-passing areas. The boundaries of each liquid-passing area are fixed to the support member, and each liquid-passing area is independent of each other, improving the overall pressure resistance of the filter membrane, avoiding premature rupture of the filter membrane under high pressure difference conditions, and meeting the filtration requirements of high pressure difference and high flux. Moreover, the first communication channel and the second communication channel are arranged to match the partitions, so as to form corresponding fluid flow paths. The filtrate in each first partition directly flows into the second communication channel and then into the outflow channel, while the filtrate in the second partition first flows into the first partition through the first communication channel, and then flows from the first partition into the second communication channel and then into the outflow channel. There is no longer a phenomenon that the filtrate flows back and forth between the two end faces multiple times. The overall flow path is simplified and the length of the flow path is greatly shortened, with low energy loss. Also, because only the filtrate on the second end face flows to the first end face through the first communication channel, compared with the existing filtration unit, the fluid flow path matching the partitions is overall greatly simplified and the length is significantly shortened. For the same volume of the filtration unit, a larger filtration area can be provided. Moreover, the phenomenon that the filtrate flows back and forth between the two end faces multiple times and the phenomenon that two filtrates with equivalent and relatively high flow rates flow towards each other between the two end faces no longer occur, and the kinetic energy loss of the filtrate is greatly reduced. Thus, the filtration unit can provide a relatively high filtrate discharge rate, meeting the filtration requirements of high flux. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0064] Figure 1 is a schematic structural diagram of the filtration unit according to an embodiment of the present invention;

[0065] Figure 2 is a schematic structural diagram of the first end face of the support member and the first filter membrane according to an embodiment of the present invention;

[0066] Figure 3 is a schematic structural diagram of the second end face of the support member and the second filter membrane according to Embodiment 1 of the present invention;

[0067] Figure 4 is a front view of the first end face of the support member according to an embodiment of the present invention;

[0068] Figure 5 is a front view of the second end face of the support member according to Embodiment 1 of the present invention;

[0069] Figure 6 is Figure 5 a schematic cross-sectional view at A-A in [description], which shows the cross-sectional structure at the first communication channel;

[0070] Figure 7 is Figure 5 a schematic cross-sectional view at B-B in [description], which shows the cross-sectional structure at the second communication channel;

[0071] Figure 8 a schematic cross-sectional view of the filtering unit according to the first embodiment of the present invention at the second communication channel;

[0072] Figure 9 a schematic structural view of the second end face of the support member and the second filter membrane according to the second embodiment of the present invention;

[0073] Figure 10 a front view of the second end face of the support member according to the second embodiment of the present invention;

[0074] Figure 11 a schematic cross-sectional view of the support member according to the second embodiment of the present invention at the second communication channel;

[0075] Figure 12 a schematic structural view of the filtering assembly according to the embodiment of the present invention;

[0076] Figure 13 a schematic cross-sectional structure view of the filtering assembly according to the embodiment of the present invention;

[0077] Figure 14 a schematic cross-sectional structure view of the filtering assembly according to the embodiment of the present invention from another angle;

[0078] Figure 15 a schematic structural view of the filter according to the embodiment of the present invention;

[0079] Figure 16 a schematic internal structure view of the filter according to the embodiment of the present invention.

[0080] Description of Reference Numerals

[0081] 1. Filtering unit; 2. Filtering assembly; 3. Outer shell; 4. Liquid outlet; 5. Liquid inlet; 6. Liquid outlet channel; 7. Liquid inlet channel;

[0082] 10. Support member; 11. First end face; 111. First partition; 112. First inner sealing area; 113. First outer sealing area; 12. Second end face; 121. Partition plate; 122. Sub-plate; 123. Partition rib; 124. Sub-rib; 125. Second partition; 126. Second inner sealing area; 127. Second outer sealing area; 13. Second communication channel; 131. First opening; 132. Second opening; 133. Cavity; 134. Strip plate; 135. Narrow channel; 136. Axial through hole; 137. Third opening; 14. First arc rib; 15. Second arc rib; 16. Outflow channel; 17. Sealing rib; 171. First surface; 172. Second surface; 18. First communication channel; 181. Inlet; 182. Outlet; 183. Step;

[0083] 20. First filter membrane; 21. First liquid passing area;

[0084] 30. Second filter membrane; 31. Second liquid passing area; 32. Third liquid passing area;

[0085] 40. Bonding wire; 41. First bonding wire; 42. Second bonding wire;

[0086] 50. Support block. Detailed implementation manners

[0087] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0088] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0089] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0090] As shown in the Figure 1 to Figure 11 accompanying drawings, the present utility model provides a filtering unit 1, including a support member 10 and a filter membrane; the support member 10 is used to support and fix the filter membrane. The filter membrane has a liquid inlet surface and a liquid outlet surface. The liquid outlet surface is used to form filtrate and is arranged facing the end surface of the support member 10. The liquid inlet surface is arranged opposite to the liquid outlet surface and is used for the feed liquid to enter the filter membrane. After the filter membrane is fixed on the end surface of the support member 10, the area not hermetically connected is called the liquid passing area, that is, the area where liquid can pass through and filtrate can be generated.

[0091] Specifically, the support member 10 has an outflow channel 16, a first end surface 11, and a second end surface 12. The first end surface 11 and the second end surface 12 are axially opposite to each other. The outflow channel 16 axially penetrates through the first end surface 11 and the second end surface 12. The outflow channel 16 is the channel for the filtrate to flow out of the filtering unit 1; the filter membrane includes a first filter membrane 20 hermetically connected corresponding to the first end surface 11 and a second filter membrane 30 hermetically connected corresponding to the second end surface 12;

[0092] The first end surface 11 has a plurality of first partitions 111. The boundaries of the first partitions 111 are hermetically connected to the corresponding areas of the first filter membrane 20. The first filter membrane 20 has first liquid passing areas 21 corresponding to the respective first partitions 111. The second end surface 12 has a plurality of second partitions 125. The boundaries of the second partitions 125 are hermetically connected to the corresponding areas of the second filter membrane 30. The second filter membrane 30 has second liquid passing areas 31 corresponding to the respective second partitions 125.

[0093] The liquid passing first liquid passing areas 21 on the first filter membrane 20 correspond to the first partitions 111, and other areas are hermetically supported by the first end surface 11 and cannot pass liquid. The liquid passing second liquid passing areas 31 on the second filter membrane 30 correspond to the second partitions 125, and other areas are hermetically supported by the second end surface 12 and cannot pass liquid. Thus, the first filter membrane 20 and the second filter membrane 30 are also respectively divided into a plurality of partitions, and the membrane area of each partition is small, which is beneficial to improving the pressure resistance of the filter membrane and can be used in high pressure difference and high throughput filtration conditions. Even if a relatively large reverse pressure appears on the downstream side of the filter membrane, it will not rupture.

[0094] The filtrate formed through the first filter membrane 20 will flow to the first partition area 111 on the first end face 11. Since the boundary of the first partition area 111 is sealingly connected to the corresponding area of the first filter membrane 20, the filtrate will not flow between the respective first partition areas 111. Similarly, at least most of the filtrate formed through the second filter membrane 30 will flow to the second partition area 125 on the second end face 12. Since the boundary of the second partition area 125 is sealingly connected to the corresponding area of the second filter membrane 30, the filtrate will not flow between the respective second partition areas 125. The support member 10 further has a plurality of first communication channels 18 and a plurality of second communication channels 13. The first communication channels 18 communicate the first partition area 111 and the second partition area 125 that are axially opposite to each other on both the first end face 11 and the second end face 12. On the side of the first end face 11, the first partition area 111 communicates with the second communication channel 13, and the second communication channel 13 communicates with the outflow channel 16. On the side of the second end face 12, the second partition area 125 is disconnected from the second communication channel 13.

[0095] Based on the above-mentioned first partition area 111, second partition area 125, first communication channels 18 and second communication channels 13, after the filtrate on the first end face 11 flows to the first partition area 111, it directly flows through the second communication channel 13 to the outflow channel 16. Since the second partition area 125 is isolated from the second communication channel 13, the filtrate in the second partition area 125 cannot directly flow to the second communication channel 13, but reaches the corresponding first partition area 111 through the first communication channel 18, and then is mixed with the filtrate in the first partition area 111 and flows in the same direction to the second communication channel 13, and then flows into the outflow channel 16. The filtrate in the second partition area 125 will only have a slight impact and then be mixed with the filtrate in the first partition area 111 after passing through the first communication channel 18. The two streams of filtrate flow in the same direction in the first partition area 111, flow to the second communication channel 13, and flow into the outflow channel 16. Therefore, in the filtration unit 1 of this embodiment, the situation where two streams of filtrate with comparable flow rates and relatively high flow rate values flow in opposite directions on both end faces will no longer occur, so there will be no strong flow impact, and there will no longer be a phenomenon that the filtrate flows back and forth between the two end faces multiple times. The overall flow path is simplified and the length of the flow path is greatly shortened, with low energy loss. Therefore, the energy loss of the filtrate flow is also small, and there will be no generation of many bubbles, which has little impact on the flow rate of the filtrate and meets the requirements of high throughput. The filtrate only passes through the second communication channel 13 or first passes through the first communication channel 18 and then flows to the second communication channel 13. The flow path is clear, and the flow distance from the filtrate to the outflow channel 16 is greatly shortened, enabling the filtrate to be quickly discharged from the outflow channel 16, further meeting the requirements of high throughput.

[0096] In summary, in the filtration unit 1 provided in the present application, by dividing the two end faces of the support member 10 into multiple partitions, the filter membrane is correspondingly formed into multiple smaller liquid passage areas. The boundaries of each liquid passage area are fixed to the support member, and each liquid passage area is independent of each other, improving the overall pressure resistance of the filter membrane, avoiding premature rupture of the filter membrane under high pressure difference conditions, meeting the filtration requirements of high pressure difference and high flux, and even if a high reverse pressure occurs, the filter membrane will not rupture; moreover, the first communication channel and the second communication channel are provided to match the partitions, so as to form corresponding fluid flow paths. Compared with the existing filtration unit, the fluid flow path matching the partitions is greatly simplified as a whole and the length is significantly shortened; for the same volume of the filtration unit, a larger filtration area can be provided; moreover, the phenomenon that the filtrate flows back and forth between the two end faces multiple times and the phenomenon that two filtrates with equivalent flow rates and relatively high flow rate values flow towards each other between the two end faces no longer occur, and the kinetic energy loss of the filtrate is greatly reduced, so that the filtration unit can provide a higher filtrate discharge rate, meeting the filtration requirements of high flux.

[0097] There are various ways to isolate the second partition 125 from the second communication channel 13. One way is that the second communication channel 13 is isolated through the solid structure on the support member 10. Another way is that the support member and the filter membrane are sealed and matched to achieve isolation; it is also possible to adopt a combination of the above two methods. Specifically, the second end face 12 has a partition portion for isolating the second partition 125 from the second communication channel 13, and the partition portion forms a sealed connection with the corresponding area of the second filter membrane 30.

[0098] Of course, in some embodiments, an additional plugging and isolating element can also be used to isolate the second partition 125 from the second communication channel 13.

[0099] Based on the structures of different partition portions, the present application also has different embodiments. Two of the embodiments will be briefly described below for the partition portion of the present application.

[0100] Embodiment 1

[0101] As shown in the appendix Figure 3 、appendix Figure 5 and appendix Figure 6As shown in the figure, the partition part in this embodiment is the partition plate 121. The number of partition plates 121 is multiple, and their positions and shapes correspond to the second communication channel 13. The second communication channel 13 extends in a strip shape, and the partition plate 121 is also in a strip shape. The partition plate 121 closes the corresponding area of the second communication channel 13 on the second end face 12, that is, the isolation between the second partition 125 and the second communication channel 13 is achieved by using the solid structure on the support member 10. The partition plate 121 can completely close the corresponding area of the second communication channel 13 on the second end face 12, so that all the filtrate formed on the second filter membrane 30 can only flow through the first communication channel 18 to the first partition 111, and flow into the second communication channel 13 in the same direction as the filtrate in the first partition 111, completely eliminating the occurrence of the phenomenon of two streams of filtrate flowing in opposite directions and mixing, and reducing the kinetic energy loss to the lowest level; the two streams of filtrate on the first end face 11 and the second end face 12 are mixed in the first partition 111 and flow into the second communication channel 13 in the same direction. They enter the cavity 133 of the second communication channel 13 through the first opening 131 of the second communication channel 13 opened on the first end face 11, and then flow out from the second opening 132 of the second communication channel 13. Since the second opening 132 is communicated with the outflow channel 16, the filtrate can smoothly enter the outflow channel 16.

[0102] The surface of the partition plate 121 on the second end face 12 is hermetically connected to the corresponding area of the second filter membrane 30, which can increase the sealing area between the second filter membrane 30 and the second end face 12, reduce the membrane area corresponding to each second partition 125, improve the pressure resistance of the second filter membrane 30 corresponding to each second partition 125, and at the same time, can also improve the connection strength between the second filter membrane 30 and the second end face 12, enhance the supporting effect of the second end face 12 on the second filter membrane 30, and further improve the pressure resistance of the second filter membrane 30, which is applicable to the working condition of high pressure difference.

[0103] As shown in the attached Figure 7 As shown in the figure, the second communication channel 13 of this embodiment includes a first opening 131 and a second opening 132 located on the first end face 11, and a cavity 133 formed between the partition plate 121 and the first end face 11. On the first end face 11, the first opening 131 and the second opening 132 are disconnected, and the first opening 131 and the second opening 132 are communicated through the cavity 133 located in the support member 10. The first opening 131 is communicated with the first communication channel 18, and the second opening 132 is communicated with the outflow channel 16.

[0104] The first opening 131 is opened on the first end face 11. For example, the first opening 131 can be a long-strip-shaped opening. Correspondingly, the cavity 133 includes a long-strip-shaped groove corresponding to the long-strip-shaped opening and an internal channel communicating between the long-strip-shaped groove and the second opening 132.

[0105] As shown in the attached Figure 7As shown in the figure, in this embodiment, the first opening 131 includes a plurality of apertures arranged at intervals. The plurality of apertures are located on the strip-shaped plate 134 of the support member 10. The strip-shaped plate 134 is a strip-shaped area where the support member 10 corresponds to the partition plate 121 in position and is axially separated from the partition plate 121. The outer surface of the strip-shaped plate 134 also belongs to the first end face 11. The opening can be circular, square or other conventional shapes. The cavity 133 includes an axially through hole 136 starting from the aperture on the strip-shaped plate 134, and a narrow channel 135 located between the opposite faces of the strip-shaped plate 134 and the partition plate 121. The narrow channel 135 communicates with the second opening 132.

[0106] Considering that the filtrate needs to flow through the narrow channel 135 between the opposite faces of the strip-shaped plate 134 and the partition plate 121 when aggregating into the second communication channel 13, therefore, the volume of the narrow channel 135 cannot be too small to avoid congestion of the filtrate in the narrow channel 135 and reduction of the flow rate. In this embodiment, the axial thickness of the partition plate 121 is H1, the total axial thickness of the support member 10 at the second communication channel 13 is H2, the axial thickness of the strip-shaped plate 134 is H3, and the axial height of the narrow channel 135 is H2 - H1 - H3. Therefore, H1 ≤ 0.5H2, H3 ≤ 0.5H2. Preferably, H1 ≤ 0.3H2 to avoid the partition plate 121 and the strip-shaped plate 134 being too close, resulting in too small a volume of the narrow space and the filtrate being unable to flow quickly to the second opening 132 in the cavity 133. Controlling the thickness of the partition plate 121 can ensure the flow area and outflow rate of the filtrate in the cavity 133.

[0107] In this embodiment, as shown in the appendix Figure 2 As shown in the figure, the outflow channel 16 is located at the center of the support member 10. The support member 10 further includes a plurality of sealing ribs 17 extending radially. The sealing ribs 17 are circumferentially spaced around the outflow channel 16. The second communication channel 13 is located on both circumferential sides of the sealing ribs 17 and also extends radially, so that the second opening 132 communicates with the outflow channel 16. The outflow channel 16 is arranged at the center of the support member 10, which is convenient for communicating with each second communication channel 13 through the second opening 132. At the same time, it is beneficial to shorten the overall length of the second communication channel 13 and the distance from the first partition 111 to the outflow channel 16, that is, shorten the path of the filtrate flowing to the outflow channel 16 and reduce the energy loss during the flow of the filtrate.

[0108] Of course, in other embodiments, the support member can be a square member, and at least one outflow channel can be arranged on the periphery of the support member 10, and the first partition and the outflow channel can be connected through the second communication channel.

[0109] As shown in the appendix Figure 2As shown in the figure, on the side of the first end face 11, there are also an annular first inner sealing area 112 and an annular first outer sealing area 113 arranged around the outflow channel 16. The sealing rib 17 includes a first surface 171. A number of first partition areas 111 are located between the first surfaces 171 of two adjacent sealing ribs 17, and are located between the radially outer side of the first inner sealing area 112 and the radially inner side of the first outer sealing area 113. The first filter membrane 20 is hermetically connected to the first inner sealing area 112, the first outer sealing area 113 and the first surface 171 respectively. Each first partition area 111 corresponding to each first liquid passage area 21 is located in the area formed by enclosing the first inner sealing area 112, the first outer sealing area 113 and the first surface 171. The first inner sealing area 112 and the first outer sealing area 113 respectively support and seal the outer periphery and the inner periphery of the first filter membrane 20, while the first surface 171 of the sealing rib 17 extending radially supports and seals a partial radial area of the first filter membrane 20, so that the pressure resistance performance of the first filter membrane 20 is better. At the same time, the sealing rib 17 divides the first end face 11 and the first filter membrane 20 into a number of non-communicating areas respectively. The first partition areas 111 and the first liquid passage areas 21 are located in the corresponding areas respectively.

[0110] It should be noted that the first partition area 111 is a partial area in the area between the first inner sealing area 112, the first outer sealing area 113 and the adjacent sealing ribs 17 where the filtrate can flow, and does not include the area hermetically connected to the first filter membrane 20.

[0111] The first opening 131 of the second communication channel 13 and the first communication channel 18 are both located in the first partition area 111. After the filtrate formed by the first filter membrane 20 enters the first partition area 111, it can directly flow into the first opening 131 of the second communication channel 13. All the filtrate formed by the second filter membrane 30 can flow into the corresponding first partition area 111 through the first communication channel 18 and then flow into the first opening 131 of the second communication channel 13. And the first opening 131 of the second communication channel 13 is located at the circumferential two boundaries of the first partition area 111. It can be understood that the outer edge of the first opening 131 coincides with the outer edge of the first partition area 111. Of course, in some embodiments, the first opening 131 can be located in a relatively inner area of the circumferential two boundaries of the first partition area 111, and the outer edge of the first opening 131 does not coincide with the outer edge of the first partition area 111. In a first partition area 111, the number of the first openings 131 is at least two, which are respectively located at the circumferential two boundaries of the first partition area 111, which is beneficial to shunt the large amount of filtrate flowing into the first partition area 111, so as to promote the filtrate to quickly enter the outflow channel 16 through the second communication channel 13, and is applicable to the working conditions of high flux.

[0112] The outflow channel 16 needs to be in communication with the outside. The function of the first inner sealing area 112 is also to isolate the first partition 111 from the outflow channel 16, define the filtrate flow direction of the first end face 11, and prevent the filtrate on the first end face 11 from flowing randomly, colliding with each other and back-mixing, resulting in energy loss and bubble generation. The first opening 131 and the second opening 132 of the second communication channel 13 on the first end face 11 are isolated by the first inner sealing area 112. Specifically, a part of the second communication channel 13 is located in the first partition 111, that is, the first opening 131 is located in the first partition 111 between the first inner sealing area 112 and the first outer sealing area 113, and a part radially crosses the first inner sealing area 112 inside the support 10, that is, a part of the narrow channel 135 radially crosses the first inner sealing area 112, and the outlet of the narrow channel 135, that is, the second opening 132, is located radially inside the first inner sealing area 112. Thus, the second communication channel 13 is communicated with the outflow channel 16 without damaging the seal between the first filter membrane 20 and the first inner sealing area 112; so that the filtrate collected into the second communication channel 13 through the first opening 131 can quickly flow to the outflow channel 16 through the second opening 132.

[0113] As shown in the Figure 3 attachment, on the side of the second end face 12, there is also an annular second inner sealing area 126 and an annular second outer sealing area 127 arranged around the outflow channel 16. The partition plate 121 extends radially and is arranged corresponding to the second communication channel 13. A number of second partitions 125 are located between adjacent partition plates 121 and between the radial outside of the second inner sealing area 126 and the radial inside of the second outer sealing area 127; the second filter membrane 30 is hermetically connected to the second inner sealing area 126, the second outer sealing area 127 and two adjacent partition plates 121 respectively, and each second liquid passing area 31 corresponding to each second partition 125 is located in the area formed by the second inner sealing area 126, the second outer sealing area 127 and two adjacent partition plates 121.

[0114] It should be noted that the second partition 125 is a partial area in the area between the second inner sealing area 126, the second outer sealing area 127 and the adjacent partition plates 121 where the filtrate can flow, and does not include the area hermetically connected to the second filter membrane 30.

[0115] The second inner sealing area 126 and the second outer sealing area 127 respectively support and seal the outer and inner circumferences of the second filter membrane 30, while the radially extending partition plate 121 supports and seals a partial radial area of the second filter membrane 30, making the pressure resistance performance of the first filter membrane 20 better; the function of the second inner sealing area 126 is also to isolate the second partition 125 from the outflow channel 16, define the filtrate flow direction of the second end face 12, avoid the random flow, collision and backmixing of the filtrate on the second end face 12, resulting in energy loss and bubble generation; at the same time, the partition plate 121 divides the second end face 12 and the second filter membrane 30 into several non-communicating areas respectively, and the second partition 125 and the second liquid passing area 31 are located in the corresponding areas respectively.

[0116] The first communication channel 18 is located in the second partition 125. Most of the areas of the first partition 111 and the second partition 125 are axially opposite. Only the area corresponding to the second communication channel 13 is located outside the second partition 125. After all the filtrate formed by the second filter membrane 30 enters the second partition 125, it can quickly flow into the first partition 111 through the first communication channel 18. At the same time, the second communication channel 13 is located outside the second partition 125. Blocked by the partition plate 121 and the second filter membrane 30, the filtrate entering the second partition 125 cannot directly enter the second communication channel 13, thus ensuring that the flow direction of the filtrate is stable and controllable, and avoiding the situation where two filtrates with comparable flow rates and relatively high flow rate values flow towards each other.

[0117] Since the partition plate 121 is provided on the second end face 12, covering the corresponding area of the second communication channel 13 on the second end face 12, avoiding the exposure of the part of the second communication channel 13 close to the second opening 132 on the second end face 12, the first inner sealing area 112 on the first end face 11 and the second inner sealing area 126 on the second end face 12 do not need to be axially offset. The outer diameters of the first inner sealing area 112 and the second inner sealing area 126 can be the same, and the sizes of the first filter membrane 20 and the second filter membrane 30 can be the same, that is, only one size of filter membrane needs to be produced, and the cost is lower.

[0118] More specifically, when the partition part is the partition plate 121, it includes two partition plates 122 on the circumferential two sides of the sealing rib 17. One circumferential side of each partition plate 122 is connected to the circumferential one side of the second partition 125, and the other circumferential side is connected to the sealing rib 17; the partition plate 121 stably connects the second inner sealing area 126, the second outer sealing area 127, the second partition 125 and the sealing rib 17. On the one hand, it enhances the structural strength of the support plate. On the other hand, it can always cover the corresponding area of the second communication channel 13 on the second end face 12 under the working condition of high pressure difference, avoiding the direct flow of the filtrate on the second end face 12 into the second communication channel 13.

[0119] Since the second communication channels 13 are respectively located at the circumferential two boundaries of the first partition 111, on the circumferential two sides of a sealing rib 17, the two dividing plates 122 correspond to two different second communication channels 13, also on the circumferential two sides of a sealing rib 17, and the axial positions corresponding to the circumferential boundaries of two adjacent first partitions 111 are corresponding. Therefore, the closer the first opening 131 of the second communication channel 13 is to the circumferential two boundaries of the first partition 111, the closer the outer edge of the first opening 131 is to the outer edge of the first partition 111, the smaller the circumferential width of the dividing plate 122, the larger the area of the second partition 125, correspondingly, the larger the area of the second liquid passage area 31, and the higher the filtration membrane utilization rate of the second filter membrane 30, and the higher the rate of generating filtrate. In addition, the two second communication channels 13 corresponding to the dividing plate 122 respectively correspond to the adjacent first partitions 111, and there are two dividing plates between adjacent first partitions 111, that is, a second communication channel 13 is respectively provided corresponding to the circumferential two boundaries of the first partition 111, increasing the filtrate flow path from the first partition 111 to the outflow channel 16, so that the filtrate can flow to the outflow channel 16 faster, which is applicable to high-throughput working conditions.

[0120] On the second end face 12, the sealing rib 17 includes a second surface 172, the end face of the partition plate 121 is flush with the second surface 172, and the second filter membrane 30 is hermetically connected to the end face of the partition plate 121 and the second surface 172. When the second surface 172 of the sealing rib 17 is flush with the end face of the partition plate 121, it is beneficial to ensure the flatness of the filter membrane, so that the area of the second filter membrane 30 corresponding to the sealing rib 17 will not be suspended, and it is not easy to be damaged under high pressure difference working conditions, ensuring the service life of the filter membrane and the filtering unit 1.

[0121] It should be noted that the first surface 171 of the sealing rib 17 is flush with the first end face 11. When its second surface 172 is flush with the partition plate 121, the axial thickness of the sealing rib 17 is the same as the thickness of the support member 10 in this area, both being H2. Correspondingly, the thickness H1 of the partition plate 121 is not greater than half of the thickness H2 of the sealing rib 17. The support member 10 is generally a plate-like structure.

[0122] As attached Figure 4As shown, on the first end face 11, the first end face 11 has several groups of first arc-shaped ribs 14 distributed circumferentially. Each group of first arc-shaped ribs 14 includes multiple first arc-shaped ribs 14 separated radially. The end face of the first arc-shaped rib 14 is flush with the first surface 171. The end face of the first arc-shaped rib 14 is hermetically connected to the first filter membrane 20 to ensure the flatness of the first filter membrane 20 on the first end face 11. Each group of first arc-shaped ribs 14 is located radially outside the first inner sealing area 112, radially inside the first outer sealing area 113, and at the same time between adjacent sealing ribs 17. The circumferential two ends of the first arc-shaped rib 14 are respectively connected to the corresponding side sealing ribs 17. Several first partition areas 111 and several first arc-shaped ribs 14 are arranged alternately in the radial direction, that is, starting from the radial outer boundary of the first inner sealing area 112, several first partition areas 111 and several first arc-shaped ribs 14 are arranged alternately in the order of first partition area 111, first arc-shaped rib 14, first partition area 111... until the radial outer boundary of the first partition area 111 at the outermost end is connected to the radial inner boundary of the first outer sealing area 113. The first opening 131 of the first communication channel 18 and the second communication channel 13 is located between the radially adjacent first arc-shaped ribs 14, between the first arc-shaped rib 14 and the first inner sealing area 112, or between the first arc-shaped rib 14 and the first outer sealing area 113, that is, correspondingly arranged in the first partition area 111.

[0123] The function of the first arc-shaped rib 14 is to further reduce the area of a single first partition area 111. Correspondingly, it also further divides the first filter membrane 20, making the area of a single liquid passing area 21 smaller. Thus, the pressure resistance performance of each liquid passing area of the first filter membrane 20 is better. In addition, the first partition area 111 is located between adjacent first arc-shaped ribs 14. The side wall of the first arc-shaped rib 14 can play a role in guiding the filtrate. The first communication channel 18 is a hole structure. The first opening 131 of the first communication channel 18 and the second communication channel 13 is correspondingly arranged between the radially adjacent first arc-shaped ribs 14, between the first arc-shaped rib 14 and the first inner sealing area 112, or between the first arc-shaped rib 14 and the first outer sealing area 113. This means that each first partition area 111 is respectively provided with two first openings 131 of a first communication channel 18 and a second communication channel 13. One end opening of the first communication channel 18 is located in the middle of the first partition area 111, and the two first openings 131 are respectively located at the circumferential two boundaries of the first partition area 111. Thus, the correspondence between the first partition area 111 and the second partition area 125 is improved. After entering the first partition area 111, the filtrate will be clearly guided to the corresponding first opening 131 of the second communication channel 13, further clarifying the flow path of the filtrate, avoiding mutual interference and impact of the filtrate during flow, causing energy loss, being beneficial to improving the filtrate flow rate, and being applicable to high-throughput working conditions.

[0124] Of course, in other embodiments, several first partitions may only have a circumferential interval distribution and no radial interval distribution, that is, the first arc-shaped ribs 14 may not be provided. At this time, the first surface 171 of the adjacent sealing ribs 17, the corresponding areas of the first inner sealing area 112, and the corresponding areas of the first outer sealing area 113 form the boundary of the first partition.

[0125] As shown Figure 5 in the figure, on the second end face 12, the second end face 12 has several groups of circumferentially distributed second arc-shaped ribs 15. Each group of second arc-shaped ribs 15 includes multiple second arc-shaped ribs 15 separated radially. The end face of the second arc-shaped rib 15 is flush with the second surface 172. The end face of the second arc-shaped rib 15 is hermetically connected to the second filter membrane 30 to ensure the flatness of the second filter membrane 30 on the second end face 12. Each group of second arc-shaped ribs 15 is located radially outside the second inner sealing area 126, radially inside the second outer sealing area 127, and at the same time between adjacent partition plates 121. The circumferential ends of the second arc-shaped ribs 15 are respectively connected to the sealing ribs 17 on the corresponding sides. Several second partitions 125 and several second arc-shaped ribs 15 are alternately arranged in the radial direction, that is, starting from the radial outer boundary of the second inner sealing area 126, several second partitions 125 and several second arc-shaped ribs 15 are alternately arranged in the order of second partition 125, second arc-shaped rib 15, second partition 125... until the radial outer boundary of the outermost second partition 125 in the radial direction is connected to the radial inner boundary of the second outer sealing area 127. The first communication channel 18 is located between radially adjacent second arc-shaped ribs 15, between the second arc-shaped rib 15 and the second inner sealing area 126, or between the second arc-shaped rib 15 and the first outer sealing area 127, that is, correspondingly arranged in the second partition 125.

[0126] The function of the second arc-shaped rib 15 is to further reduce the area of a single second partition 125. Correspondingly, it also further divides the second filter membrane 30, making the area of a single liquid passage area 31 smaller. Thus, the pressure resistance performance of each liquid passage area of the second filter membrane 30 is better. In addition, the second partition 125 is located between adjacent second arc-shaped ribs 15, and the side wall of the second arc-shaped rib 15 can play a role in guiding the filtrate. The first communication channel 18 is located between radially adjacent second arc-shaped ribs 15, between the second arc-shaped rib 15 and the second inner sealing area 126, or between the second arc-shaped rib 15 and the first outer sealing area 127, that is, correspondingly arranged in the second partition 125. This means that the first communication channel 18 is a hole structure, and only one end of the first communication channel 18 in a single second partition 125 is open. The filtrate entering the second partition 125 can only enter the corresponding first partition 111 through the corresponding first communication channel 18, further clarifying the flow path of the filtrate, avoiding mutual interference and impact of the filtrate during flow, causing energy loss, and being beneficial to improving the filtrate flow rate, which is suitable for high-throughput working conditions.

[0127] In this embodiment, the distribution pattern of the first partitions 111 is as follows: a number of first partitions 111 are first grouped, and each group is circumferentially spaced between the first surfaces 171 of adjacent sealing ribs 17, and then the number of first partitions 111 within each group are radially spaced; of course, in other embodiments, a number of first partitions may only have circumferential spacing and no radial spacing, that is, the first arc-shaped ribs 14 may not be provided; the distribution pattern of the second partitions 125 in this embodiment is as follows: a number of second partitions 125 are first grouped, and each group is circumferentially spaced between the second surfaces 172 of adjacent sealing ribs 17, and then the number of second partitions 125 within each group are radially spaced; of course, in other embodiments, a number of second partitions may only have circumferential spacing and no radial spacing, that is, the second arc-shaped ribs 15 may not be provided. At this time, the edges of adjacent partition plates 121, the corresponding areas of the second inner sealing area 126, and the corresponding areas of the second outer sealing area 127 form the boundary of the second partition.

[0128] As shown in the attached Figure 6 figure, the first communication channel 18 is a through-hole structure, is disposed adjacent to the first arc-shaped rib 14, and in the axial direction from the second end face 12 to the first end face 11, the radial width of the first communication channel 18 gradually decreases, that is, the width of the inlet 181 of the first communication channel 18 on the second end face 12 is greater than the width of the outlet 182 of the first communication channel 18 on the first end face 11, so as to play a role of quickly guiding the filtrate in the second partition 125 to the first partition 111; the outlet 182 of the first communication channel 18 on the first end face 11 is located between the radially adjacent first arc-shaped ribs 14. In order to ensure the flow area of the first partition 111 between the radially adjacent first arc-shaped ribs 14, there is a step 183 between the outlet 182 of the first communication channel 18 and the side surface of the first arc-shaped rib 14, so that the radial width of the first partition 111 is equivalent to or greater than the radial width of the second partition 125, thereby ensuring the flow rate of the filtrate aggregated into the first partition 111.

[0129] Embodiment Two

[0130] As shown in the attached Figure 8 to the attached Figure 11As shown in the figure, the difference between this embodiment and the first embodiment is that the partition part is the partition rib 123. The partition part is the partition rib 123 disposed adjacent to the second communication channel 13. Both the second communication channel 13 and the partition rib 123 are circumferentially distributed on the second end face 12 of the support member 10. Moreover, the shapes of the second communication channel 13 and the partition rib 123 correspond to each other, both being strip-shaped. Also, the numbers of the second communication channel 13 and the partition rib 123 correspond to each other. The partition rib 123 is disposed between the second communication channel 13 and the second partition 125. At the same time, the partition rib 123 is hermetically connected to the second filter membrane 30. That is, the solid rib structure of the support member 10 cooperates with the second filter membrane 30 to physically separate the second communication channel 13 and the second partition 125. The surface of the partition rib 123 is flush with the second surface 172 of the sealing rib 17, and the second filter membrane 30 is hermetically connected to the surface of the partition rib 123 and the second surface 172.

[0131] The partition rib 123 can increase the sealing area between the second filter membrane 30 and the second end face 12, and divide the second filter membrane 30 into more partitions capable of filtering the filtrate. The filter membrane area corresponding to each partition is smaller, thereby improving the pressure resistance of the filter membrane in each partition.

[0132] Specifically, in this embodiment, the second communication channel 13 includes a first opening 131, a second opening 132, and a third opening 137. The first opening 131 and the second opening 132 are located on the first end face 11, and on the first end face 11, the first opening 131 and the second opening 132 are disconnected. The first opening 131 communicates with the first communication channel 18, and the second opening 132 communicates with the outflow channel 16. The third opening 137 is located on the second end face 12 and is between two adjacent partition ribs 123. Since the third opening 137 is located on the second end face 12, the filtrate formed by the second filter membrane 30 will not all flow to the second partition 125. Instead, most of the filtrate flows through the first communication channel 18 in the second partition 125 to the corresponding first partition 111, and flows into the second communication channel 13 together with the filtrate in the first partition 111, and then flows into the outflow channel 16 together. Corresponding to the third opening 137 is the third liquid passage area 32 of the second filter membrane 30, which will also form a small amount of filtrate and directly enter the third opening 137 without entering the first partition 111 through the second partition 125. However, since the area of the third opening 137 is much smaller than the area of the first partition 111, the flow rate of the filtrate flow formed by the third liquid passage area 32 of the second filter membrane 30 corresponding to the third opening 137 is small. This small-flow filtrate will flow into the second communication channel 13 in the direction of the first end face 11, while the filtrate in the first partition 111 will flow into the second communication channel 13 in the direction of the second end face 12. Although in this embodiment, two-phase fluid counterflows are formed at both ends of the second communication channel 13, because the area of the third liquid passage area 32 of the second filter membrane 30 corresponding to the third opening 137 is very small, the flow rate flowing into the second communication channel 13 from the second end face 12 to the first end face 11 is very small. Therefore, no strong counterflow impact will be formed, no excessive energy loss will be generated, and the influence on the flow rate can be ignored.

[0133] Furthermore, the partition rib 123 includes two sub-ribs 124 spaced on both circumferential sides of the sealing rib 17. One circumferential side of the sub-rib 124 is connected to one circumferential side of the second partition 125. The third opening 137 of the second communication channel 13 is located between the sub-rib 124 and the sealing rib 17. The second filter membrane 30 forms a third liquid passage area 32 corresponding to each third opening 137, improving the utilization rate of the second filter membrane 30. At the same time, after being separated by the sealing rib 17, the area of the third opening 137 is even smaller than that of the first partition 111 and the second partition 125. The filtrate formed by the corresponding third liquid passage area 32 is also less, and the flow rate is also smaller, with a large difference from the flow rate of the filtrate entering through the first opening 131. Therefore, although the flow direction of this part of the filtrate when entering the third opening 137 is opposite to the flow direction of the filtrate when entering the first opening 131, no strong counterflow impact and mixing will be formed, no excessive energy loss will be generated, and the influence on the flow rate is very small.

[0134] In addition, there is a second communication channel 13 between each of the two dividing ribs 124 and the sealing rib 17. On the first end face 11, the second communication channels 13 are respectively located at the circumferential two boundaries of the first partition 111, on the circumferential two sides of a sealing rib 17, and the dividing ribs 124 are also on the circumferential two sides of a sealing rib 17, corresponding to the circumferential boundaries of the adjacent first partitions 111. Therefore, the closer the first opening 131 of the second communication channel 13 is to the circumferential two boundaries of the first partition 111, the closer the outer edge of the first opening 131 is to the outer edge of the first partition 111, the smaller the circumferential width of the dividing rib 124, the larger the area of the second partition 125, correspondingly, the larger the area of the second liquid passage area 31, and the higher the filtration membrane utilization rate of the second filter membrane 30, and the higher the rate of generating filtrate.

[0135] The two second communication channels 13 corresponding to the dividing ribs 124 respectively correspond to the adjacent first partitions 111, and there are two dividing ribs 124 between adjacent first partitions 111, that is, a second communication channel 13 is respectively provided at the circumferential two boundaries corresponding to the first partition 111, increasing the filtrate flow path from the first partition 111 to the outflow channel 16. Each first partition 111 is connected to two circumferential second communication channels, so that the filtrate in each first partition 111 can flow to the outflow channel 16 faster, which is applicable to high-throughput working conditions. And the separating rib 123 further divides a smaller third liquid passage area 32 on the second filter membrane 30. The filter membrane area corresponding to the third liquid passage area 32 is smaller, and the pressure resistance performance is better, which is applicable to high-pressure difference working conditions.

[0136] As shown in the Figure 10 attachment, the third opening 137 of the second communication channel 13 on the second end face 12 is located between the second inner sealing area 126 and the second outer sealing area 127, that is, the second opening 132 is located at the position corresponding to the radially innermost end of the third opening 137 and the first end face 11. Due to the existence of the second inner sealing area 126, the third opening 137 is not connected to the outflow channel 16 either, and still needs to be connected to the outflow channel 16 through the second opening 132. The isolation between the third opening 137 and the second partition 125 depends on the sealed connection between the second filter membrane 30 and the dividing rib 124 on the second end face 12. Due to the existence of the third opening 137, the outer diameter of the second inner sealing area 126 is smaller than the outer diameter of the first inner sealing area 112, making the area of the annular second filter membrane 30 on the second end face 12 larger than the area of the annular first filter membrane 20 on the first end face 11, and the liquid passage area of the second filter membrane 30 is also larger than the liquid passage area of the first filter membrane 20. Therefore, the filtration rate of the entire filtration unit 1 is higher.

[0137] As shown in the Figure 12 attachment Figure 14, is a filter assembly 2 of an embodiment of the utility model, comprising several filter units 1 of the above-mentioned embodiments. It should be noted that in some embodiments, the filter assembly 2 may include only one filter unit 1. In this embodiment, multiple filter units 1 are stacked axially and sealed up and down, and the top of the outflow channel 16 of the filter assembly 2 needs to be blocked by a closure such as a circular plate. Multiple filter units 1 are used in combination to improve the generation efficiency of the filtrate, that is, to provide a higher filtration flux.

[0138] The outflow channels 16 of each filter unit 1 are sealed and connected to form an integrated liquid outlet channel. Specifically, the filter unit 1 is provided with a welding line 40 on the outer periphery of the outflow channel 16. The welding line 40 is located radially inside the first inner sealing area 112 and the second inner sealing area 126. Specifically, different welding lines are distinguished. The welding line of the first end face 11 is the first welding line 41, and the welding line of the second end face 12 is the second welding line 42. The first welding line 41 and the second welding line 42 are offset and misaligned in the radial direction, and the second welding line 42 is relatively closer to the outflow channel 16. In order to ensure that the filtrate formed in the filter unit 1 can smoothly and quickly enter the liquid outlet channel 6, the second opening 132 of the second connecting channel 13 is located radially inside the first welding line 41; and because the second opening 132 is a small-area hole such as a square hole or a round hole, under the condition of high pressure difference, the filtrate is not easy to flow back to the filter unit 1, causing flow impact and energy loss.

[0139] In this embodiment, each filter unit 1 is welded into a filter assembly by welding wires. Specifically, the first end faces 11 of two filter units 1 are arranged opposite to each other and are sealed and connected into a group by a first welding wire 41. Adjacent groups are sealed and connected by a second welding wire 42 to form a filter assembly. Of course, in some embodiments, the filter assembly may be a group of filter assemblies including two filter units.

[0140] A plurality of support blocks 50 are provided at intervals in the circumferential direction on the outer peripheral wall of the support member 10 of the filter unit 1. The axial end faces of the support blocks 50 of adjacent filter units 1 abut against or form a connection with each other, and form a liquid inlet channel 7 between adjacent filter units 1. On the one hand, the support blocks 50 of adjacent filter units 1 can improve the stability of the connection between the filter units 1, which is suitable for high pressure difference working conditions; on the other hand, they can also increase the axial distance between adjacent filter units 1 to form a liquid inlet channel 7 of uniform size, so that the feed liquid can quickly enter the liquid inlet channel 7, and then quickly form a filtrate, enter the outflow channel 16 through the first connecting channel 18 and the second connecting channel 13, and merge in the liquid outlet channel 6, which is suitable for high-throughput working conditions.

[0141] As attached Figure 15 and attached Figure 16, the embodiment of the present utility model further provides a filter, which includes a housing 3 and also includes the filtering component 2 of the above embodiment. It should be noted that the filtering component 2 in the housing 3 may include only one filtering unit 1. The filtering component 2 is hermetically assembled in the housing 3. Specifically, one of the two filtering units 1 at the outermost end of the filtering component 2 in the axial direction, the second welding wire 42 thereon is hermetically welded to the inner wall of the liquid outlet 4 of the housing 3, so as to hermetically fix the filtering component 2 in the housing 3. Correspondingly, the liquid inlet flow channel 7 and the liquid outlet flow channel 6 are respectively communicated with the liquid inlet 5 and the liquid outlet 4 on the housing 3 to form a liquid inlet path and a liquid outlet path. It should be noted that in the filter, the top of the outflow channel 16 of the filtering component 2 needs to be blocked by a closing member such as a circular plate.

[0142] Based on the filtering unit 1 of the above embodiment, the filter of this embodiment is applicable to working conditions with high pressure difference and high throughput, has a long service life, and the flow rate of the filtrate is not easily reduced, meeting the use requirements.

[0143] The above implementation manners are only the preferred implementation manners of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A filter unit comprising a support and a filter membrane; The support member has an outflow channel, a first end surface and a second end surface, the first end surface and the second end surface are axially arranged opposite to each other, and the outflow channel axially penetrates the first end surface and the second end surface; The filter membrane comprises a first filter membrane correspondingly connected to the first end surface in a sealed manner and a second filter membrane correspondingly connected to the second end surface in a sealed manner; characterized in that: The first end surface has a plurality of first partitions, the boundaries of the first partitions are sealed and connected to the corresponding areas of the first filter membrane, the first filter membrane has a first liquid-passing area corresponding to each of the first partitions, the second end surface has a plurality of second partitions, the boundaries of the second partitions are sealed and connected to the corresponding areas of the second filter membrane, and the second filter membrane has a second liquid-passing area corresponding to each of the second partitions; The support member also has multiple first connecting channels and multiple second connecting channels, the first connecting channels connecting the first partition and the second partition axially opposite to each other in the first end face and the second end face; on the first end face side, the first partition is connected to the second connecting channel, and the second connecting channel is connected to the outflow channel; on the second end face side, the second partition is disconnected from the second connecting channel.

2. The filter unit according to claim 1, characterized in that The second end surface has a partition portion that isolates the second partition from the second connecting channel, and the partition portion forms a sealed connection with a corresponding area of ​​the second filter membrane.

3. The filter unit according to claim 2, characterized in that The partition part is a partition plate, which includes a plurality of partition plates. The partition plates are strip-shaped, close the corresponding area of ​​the second connecting channel on the second end surface, and are sealed and connected with the corresponding area of ​​the second filter membrane; The second communication passage includes a first opening and a second opening located at the first end surface, and a cavity formed between the partition plate and the first end surface; On the first end surface, the first opening and the second opening are disconnected, the first opening is communicated with the first communication channel, and the second opening is communicated with the outflow channel.

4. The filter unit according to claim 2, characterized in that The partition part is a partition rib arranged adjacent to the second connecting channel, and includes a plurality of partition ribs, and the partition ribs are sealed and connected to the second filter membrane; The second communication channel includes a first opening, a second opening and a third opening, the first opening and the second opening are located on the first end surface, and on the first end surface, the first opening and the second opening are disconnected, the first opening is communicated with the first communication channel, and the second opening is communicated with the outflow channel; The third opening is located on the second end surface and between two adjacent dividing ribs.

5. The filter unit according to any one of claims 2 to 4, characterized in that: The outflow channel is located at the center of the support member, and the support member further comprises a plurality of radially extending sealing ribs, the sealing ribs being circumferentially spaced and distributed around the outflow channel; On the first end surface side, it also includes an annular first inner sealing area and an annular first outer sealing area arranged around the outflow channel, the sealing rib includes a first surface, a plurality of the first partitions are located between the first surfaces of two adjacent sealing ribs, and are located between the radial outer side of the first inner sealing area and the radial inner side of the first outer sealing area; the first filter membrane is sealedly connected to the first inner sealing area, the first outer sealing area and the first surface respectively, the first opening of the second communication channel and the first communication channel are both located in the first partition, and the first opening of the second communication channel is located at the two circumferential boundaries of the first partition; and / or, On the second end face side, it also includes an annular second inner sealing area and an annular second outer sealing area arranged around the outflow channel, the partition extends radially, and a plurality of second partitions are located between adjacent partitions, and are located between the radial outer side of the second inner sealing area and the radial inner side of the second outer sealing area; the second filter membrane is respectively sealed and connected to the second inner sealing area, the second outer sealing area and two adjacent partitions, the first connecting channel is located in the second partition, and the second connecting channel is located outside the second partition.

6. The filter unit according to claim 5, characterized in that The first opening and the second opening of the second communication channel located on the first end surface are separated by the first inner sealing area, the first opening is located in the first partition between the first inner sealing area and the first outer sealing area, and the second opening is located radially inward of the first inner sealing area; and / or, When the partition portion is a partition rib, the third opening of the second communicating channel on the second end surface is located between the second inner sealing area and the second outer sealing area.

7. The filter unit according to claim 5, characterized in that When the partition is a partition plate, it includes two partition plates located on both sides of the sealing rib in the circumferential direction, one circumferential side of the partition plate is connected to one circumferential side of the second partition, and the other circumferential side is connected to the sealing rib; and / or, When the partition is a partition plate, the axial thickness of the partition plate is H1, and the axial thickness of the sealing rib is H2, and the following condition is met: H1 is not greater than 0.5H2.

8. The filter unit according to claim 5, characterized in that When the partition is a partition rib, it includes two partition ribs spaced apart on both sides of the sealing rib in the circumferential direction, one circumferential side of the partition rib is connected to one circumferential side of the second partition, the third opening of the second connecting channel is located between the partition rib and the sealing rib, and the second filter membrane forms a third liquid-passing area corresponding to each of the third openings.

9. The filter unit according to claim 5, characterized in that On the second end face, the sealing rib includes a second surface. When the partition portion is a partition plate, the end face of the partition plate is flush with the second surface, and the second filter membrane is sealedly connected to the end face of the partition plate and the second surface; or, when the partition portion is a partition rib, the surface of the partition rib is flush with the second surface, and the second filter membrane is sealedly connected to the surface of the partition rib and the second surface.

10. The filter unit according to claim 5, characterized in that The first end surface has a plurality of groups of circumferentially distributed first arcuate ribs, each group of first arcuate ribs is located between adjacent sealing ribs and between the radial outer side of the first inner sealing area and the radial inner side of the first outer sealing area, the plurality of first arcuate ribs in each group are radially spaced, the plurality of first subareas and the plurality of first arcuate ribs are radially alternately arranged, and the end surface of each first arcuate rib is flush with the first surface and is sealed and connected to the first filter membrane, the circumferential ends of each first arcuate rib are respectively connected to the sealing rib on the corresponding side, and the first openings of the first connecting channel and the second connecting channel are correspondingly arranged between the radially adjacent first arcuate ribs, between the first arcuate rib and the first inner sealing area, and between the first arcuate rib and the first outer sealing area; and / or, The second end face has several groups of circumferentially distributed second arcuate ribs, each group of first arcuate ribs is located between adjacent partitions and between the radial outer side of the second inner sealing area and the radial inner side of the second outer sealing area, several second arcuate ribs in each group are radially spaced, several second partitions and several second arcuate ribs are alternately arranged in the radial direction, and the end face of each second arcuate rib is flush with the end face of the partition and is sealed to the second filter membrane, the circumferential ends of each second arcuate rib are respectively connected to the partition on the corresponding side, and the first connecting channel is correspondingly arranged between radially adjacent second arcuate ribs, between the second arcuate rib and the first inner sealing area, and between the second arcuate rib and the first outer sealing area.

11. A filter assembly, characterized in that: It comprises a plurality of filter units as claimed in claims 1 to 10, wherein the plurality of filter units are sealed and stacked axially up and down, and the outflow channels of the filter units are sealed and connected to form an integrated liquid outlet channel; a plurality of support blocks are circumferentially spaced on the outer peripheral wall of the support member of the filter unit, the axial end faces of the support blocks of adjacent filter units abut against or are connected to each other, and a liquid inlet channel is formed between adjacent filter units.

12. A filter comprising a housing, characterized in that: It also includes the filter assembly according to claim 11, wherein the filter assembly is sealed and assembled in the shell, and the liquid inlet flow channel and the liquid outlet flow channel are respectively connected to the liquid inlet and the liquid outlet on the shell to form a liquid inlet path and a liquid outlet path.

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