Filter used in hemodialyzer

Abstract

The invention discloses a filter used in a hemodialyzer, and relates to the field of hemodialyzers, the filter comprises a shell sleeve, a middle plate rack, a flow guide unit, a membrane cleaning unit and a control unit, the membrane cleaning unit and the flow guide unit can move to a first position and a second position under the control of the control unit, the first position is a working position where the membrane cleaning unit is separated from the filtering channel and the flow guide unit is overlapped with the filtering channel, and the second position is a membrane cleaning position where the membrane cleaning unit is overlapped with the filtering channel and the flow guide unit is separated from the filtering channel. The hemodialysis filter membrane for hemodialysis filtration is arranged in the shell sleeve, and the shell sleeve is internally compatible with the membrane cleaning unit capable of regularly cleaning the hemodialysis filter membrane, so that when the device is actually used, the replacement frequency of the hemodialysis filter membrane is reduced, and the replacement efficiency of the hemodialysis filter membrane is improved. The membrane cleaning unit is used for regularly cleaning the membrane, so that the use cost of the equipment is reduced, and the downtime of the equipment can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of hemodialysis, and particularly to a filter for the inside of a hemodialyzer. Background Art

[0002] As is well known, hemodialysis is a common treatment method for patients with renal failure, and its core device is a hemodialyzer. The dialyzer separates the patient's blood from the dialysate through a semipermeable membrane, and uses the concentration difference and convection principle to remove metabolic wastes and excess fluid from the blood.

[0003] However, in actual use, the existing dialyzer lacks a cleaning mechanism for cleaning the dialysis membrane inside. During the long-term use of the dialyzer, due to the deposition and attachment of cells, proteins, and other substances in the blood on the membrane surface, a biofilm is likely to form on the dialysis membrane surface. The formation of the biofilm not only reduces the dialysis efficiency, but may also pose a threat to the safety of patients and increase the infection risk. To solve the problem of membrane fouling, the current dialyzer generally replaces the dialysis membrane regularly. This method is not only costly, but also has a cumbersome operation process and requires medical staff to have certain professional skills. In addition, replacing the dialysis membrane will cause the device to stop, affect the continuity of patient treatment, and increase the economic and time burden on patients. Summary of the Invention

[0004] (I) Object of the Invention

[0005] In view of this, the object of the present invention is to provide a filter for the inside of a hemodialyzer. The device installs the dialysis filter membrane for hemodialysis filtration inside the housing, and is compatible with a membrane cleaning unit that can regularly clean the dialysis filter membrane inside the housing. Therefore, during actual use, the device reduces the replacement frequency of the dialysis filter membrane and only needs to regularly clean it through the membrane cleaning unit, thereby reducing the use cost of the device.

[0006] (II) Technical Solution

[0007] To achieve the above technical object, the present invention provides a filter for the inside of a hemodialyzer, which includes a housing, a middle plate frame, a diversion unit, a membrane cleaning unit, and a control unit. Among them, the middle plate frame is installed inside the housing, and a filter channel for passing blood is provided on the middle plate frame. The dialysis filter membrane is installed in the filter channel. The diversion unit is arranged inside the housing and is used to guide the blood to flow through the filter channel. The membrane cleaning unit is arranged inside the housing and is used to regularly clean the dialysis filter membrane. The control unit is arranged inside the housing and is used to control the synchronous circumferential rotation of the diversion unit and the membrane cleaning unit;

[0008] The film cleaning unit and the flow guiding unit can move to a first position and a second position under the control of a control unit. The first position is the working position where the film cleaning unit is separated from the filtration channel and the flow guiding unit coincides with the filtration channel. The second position is the film cleaning position where the film cleaning unit coincides with the filtration channel and the flow guiding unit is separated from the filtration channel. When the device is in normal use, the flow guiding unit is in the working position where it coincides with the filtration channel. Blood is guided through the filtration channel by the flow guiding unit, passes through the interior of the filtration channel, and is filtered under the action of the dialysis filter membrane. When the set film cleaning time is reached, the control unit controls the flow guiding unit and the film cleaning unit to rotate synchronously in the circumferential direction, so that the flow guiding unit is separated from the filtration channel and the film cleaning unit coincides with the filtration channel. At this time, the film cleaning unit is activated, and the dialysis filter membrane inside the filtration channel can be cleaned. After the film cleaning is completed, the control unit controls the flow guiding unit and the film cleaning unit to reset to the first position, which can ensure the dialysis efficiency of the dialysis filter membrane and reduce the treatment time and cost.

[0009] As a further description of the above technical solution: Ring-shaped turntables are embedded and installed on both the upper surface and the lower surface of the middle disc frame, and the ring-shaped turntables are concentrically arranged with the middle disc frame;

[0010] Circular turntables are rotatably installed on both the top and the bottom of the housing sleeve. Among them, the flow guiding unit and the film cleaning unit are both installed between the circular turntable and the ring-shaped turntable. Through holes are provided at positions on the ring-shaped turntable where the flow guiding unit and the film cleaning unit are connected. Such a structural setting enables the ring-shaped turntable to drive the flow guiding unit and the film cleaning unit to rotate synchronously when rotating around the center of the middle disc frame, achieving the effect of converting the flow guiding unit and the film cleaning unit between the first position and the second position.

[0011] As a further description of the above technical solution: The control unit includes a motor and a synchronous frame A. The motor is installed at the center of the middle disc frame. The synchronous frame A connects the flow guiding unit and the film cleaning unit, and the output shaft of the motor is connected to the center of the synchronous frame A. Therefore, when the motor operates, it can drive the synchronous frame A to rotate, thereby realizing the rotation control of the flow guiding unit and the film cleaning unit.

[0012] As a further description of the above technical solution: The diversion unit includes two blood filtration cartridges, upper and lower. The two blood filtration cartridges are respectively fixed on the surfaces of two annular turntables. The two blood filtration cartridges are respectively connected to two circular turntables through blood conduits. A blood conduit joint connected to the blood conduit is installed outside the circular turntable. The outer sides of the two blood filtration cartridges are fixedly connected through Synchronization Frame B. Therefore, the entire diversion unit can rotate integrally following the rotation of the annular turntable, and the blood conduit is connected to the blood vessels inside the hemodialyzer through the blood conduit joint.

[0013] As a further description of the above technical solution: The membrane cleaning unit includes an upper membrane cleaning mechanism and a lower membrane cleaning mechanism. The upper membrane cleaning mechanism and the lower membrane cleaning mechanism are respectively installed on the surfaces of two annular turntables. The outer sides of the upper membrane cleaning mechanism and the lower membrane cleaning mechanism are fixedly connected through Synchronization Frame B. The upper membrane cleaning mechanism and the lower membrane cleaning mechanism are respectively connected to two circular turntables through membrane cleaning fluid pipes. A membrane cleaning fluid joint connected to the upper membrane cleaning mechanism and the lower membrane cleaning mechanism is installed outside the circular turntable. The upper membrane cleaning mechanism and the lower membrane cleaning mechanism are connected to external liquid supply equipment and liquid suction equipment through the membrane cleaning fluid joint. When membrane cleaning is required, the liquid supply equipment provides membrane cleaning fluid to the upper membrane cleaning mechanism and the lower membrane cleaning mechanism. After the membrane cleaning is completed, the liquid suction equipment sucks out the membrane cleaning fluid to achieve membrane cleaning of the dialysis filter membrane.

[0014] As a further description of the above technical solution: The upper membrane cleaning mechanism includes an upper membrane cleaning cylinder and an upper membrane cleaning assembly installed inside the upper membrane cleaning cylinder. Among them, the upper membrane cleaning assembly includes an upper fixed disk fixed above the inner wall of the upper membrane cleaning cylinder, an upper washing cover arranged below the upper fixed disk, and an upper pipe that connects the space above the upper fixed disk in the upper membrane cleaning cylinder to the internal space of the upper washing cover;

[0015] The lower membrane cleaning mechanism includes a lower membrane cleaning cylinder and a lower membrane cleaning assembly installed inside the lower membrane cleaning cylinder. Among them, the lower membrane cleaning assembly includes a lower fixed disk fixed on the inner wall of the lower membrane cleaning cylinder, a lower washing cover arranged above the lower fixed disk, and a lower pipe that connects the space below the lower fixed disk in the lower membrane cleaning cylinder to the internal space of the lower washing cover. When cleaning the dialysis filter membrane, the upper washing cover and the lower washing cover respectively cover both ends of the filtration channel, and then the liquid supply equipment injects membrane cleaning fluid from below the filtration channel to perform reverse cleaning on the dialysis filter membrane in the filtration channel to achieve membrane cleaning of the dialysis filter membrane.

[0016] As a further description of the above technical solution: An upper movable control device and a lower movable control device are respectively installed on the upper fixed disk and the lower fixed disk. The upper movable control device and the lower movable control device can respectively control the upper washing cover and the lower washing cover to move vertically, so that the upper washing cover and the lower washing cover can be clamped into the filtration channel. In this way, the cleaning space formed by the internal spaces of the upper washing cover and the lower washing cover and the filtration channel can be reduced, so that the contact between the cleaning solution and the dialysis filter membrane is better, and the cleaning efficiency of the dialysis filter membrane is improved.

[0017] As a further description of the above technical solution: The upper pipe and the lower pipe are made of corrugated pipes.

[0018] As a further description of the above technical solution: The upper movable control device and the lower movable control device adopt cylinders, and the piston rods of the cylinders are connected to the upper washing cover and the lower washing cover.

[0019] As a further description of the above technical solution: An installation cavity is formed inside the lower washing cover, a perforated plate is arranged on the surface of the installation cavity, and an ultrasonic generator is arranged inside the installation cavity. In this way, when cleaning the dialysis filter membrane, the ultrasonic generator can emit ultrasonic waves to cause the cleaning solution in the cleaning space to oscillate, thereby improving the cleaning effect.

[0020] In the above technical solution, a filter for the inside of a hemodialyzer provided by the present invention. The device installs a dialysis filter membrane for hemodialysis filtration inside a housing, and a cleaning unit capable of regularly cleaning the dialysis filter membrane is compatible inside the housing. Therefore, during actual use of the device, the replacement frequency of the dialysis filter membrane is reduced. Only regular cleaning of it is required through the cleaning unit, which reduces the use cost of the device and can reduce the downtime of the device. And through the structural design of the cleaning unit, that is, the upper and lower washing covers of the cleaning unit are designed as a liftable and movable structure. During cleaning, the two washing covers can directly be clamped into the filtration channel to form a cleaning space inside the filtration channel and the upper and lower washing covers, and cooperate with the internally installed ultrasonic generator. In this way, the cleaning efficiency can be greatly improved, and the time for the device to be in the cleaning position is reduced. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0022] Figure 1 It is a schematic diagram of the overall structure of a filter for the inside of a hemodialyzer provided by the present invention;

[0023] Figure 2 Schematic diagram of the internal structure of a filter for the interior of a hemodialyzer provided by the present invention Figure 1 ;

[0024] Figure 3 Schematic diagram of the internal structure of a filter for the interior of a hemodialyzer provided by the present invention Figure 2 ;

[0025] Figure 4 Schematic diagram of the installation structure of the middle cleaning membrane unit and the diversion unit in a filter for the interior of a hemodialyzer provided by the present invention;

[0026] Figure 5 Schematic diagram of the middle plate structure in a filter for the interior of a hemodialyzer provided by the present invention;

[0027] Figure 6 Schematic diagram of the structure of the upper cleaning membrane assembly in a filter for the interior of a hemodialyzer provided by the present invention;

[0028] Figure 7 Another perspective schematic diagram of the upper cleaning membrane assembly in a filter for the interior of a hemodialyzer provided by the present invention;

[0029] Figure 8 Schematic diagram of the structure of the lower cleaning membrane assembly in a filter for the interior of a hemodialyzer provided by the present invention;

[0030] Figure 9 Another perspective schematic diagram of the lower cleaning membrane assembly in a filter for the interior of a hemodialyzer provided by the present invention.

[0031] Description of the drawings: 1. Housing sleeve; 10. Circular turntable; 2. Cleaning membrane unit; 20. Cleaning liquid pipe joint; 21. Cleaning liquid pipe; 22. Upper cleaning membrane mechanism; 220. Upper cleaning membrane cylinder; 221. Upper cleaning membrane assembly; 2210. Upper fixed plate; 2211. Upper washing cover; 2212. Upper pipe; 2213. Upper movable control device; 2214. Limit protrusion; 23. Lower cleaning membrane mechanism; 230. Lower cleaning membrane cylinder; 231. Lower cleaning membrane assembly; 2310. Orifice plate; 2311. Lower washing cover; 2312. Lower pipe; 2313. Lower movable control device; 2314. Ultrasonic generator; 2315. Installation cavity; 3. Diversion unit; 30. Blood catheter joint; 31. Blood catheter; 32. Blood filter cylinder; 4. Middle plate frame; 40. Motor; 41. Synchronous frame A; 42. Synchronous frame B; 43. Ring-shaped turntable; 430. Through hole; 44. Dialysis filter membrane; 45. Filter channel. Detailed implementation manners

[0032] The following description is merely exemplary in nature and is not intended to limit the present disclosure, its application, and uses. It should be understood that in all these figures, the same or similar reference numerals indicate the same or similar parts and features. Each figure only schematically shows the concept and principle of the embodiments of the present disclosure, and does not necessarily show the specific dimensions and their ratios of the various embodiments of the present disclosure. In a specific part of a specific figure, the relevant details or structures of the embodiments of the present disclosure may be illustrated in an exaggerated manner.

[0033] Embodiment 1

[0034] As Figures 1-9 shown: This embodiment provides a technical solution: A filter for the interior of a hemodialyzer, comprising a housing sleeve 1, a middle disk frame 4, a flow guiding unit 3, a membrane cleaning unit 2, and a control unit. Among them, the middle disk frame 4 is installed inside the housing sleeve 1. A filtering channel 45 for passing blood is provided on the middle disk frame 4. A dialysis filter membrane 44 is installed in the filtering channel 45. The flow guiding unit 3 is arranged inside the housing sleeve 1 and is used to guide blood to flow through the filtering channel 45. The membrane cleaning unit 2 is arranged inside the housing sleeve 1 and is used to periodically clean the dialysis filter membrane 44. The control unit is arranged inside the housing sleeve 1 and is used to control the flow guiding unit 3 and the membrane cleaning unit 2 to rotate synchronously in the circumferential direction;

[0035] The membrane cleaning unit 2 and the flow guiding unit 3 can move to a first position and a second position under the control of the control unit. The first position is the working position where the membrane cleaning unit 2 is separated from the filtering channel 45 and the flow guiding unit 3 coincides with the filtering channel 45. The second position is the membrane cleaning position where the membrane cleaning unit 2 coincides with the filtering channel 45 and the flow guiding unit 3 is separated from the filtering channel 45. When the device is in normal use, the flow guiding unit 3 is in the working position coinciding with the filtering channel 45. Blood is guided by the flow guiding unit 3 through the filtering channel 45, passes through the inside of the filtering channel 45, and is filtered under the action of the dialysis filter membrane 44. When the set membrane cleaning time is reached, the control unit controls the flow guiding unit 3 and the membrane cleaning unit 2 to rotate synchronously in the circumferential direction, so that the flow guiding unit 3 is separated from the filtering channel 45 and the membrane cleaning unit 2 coincides with the filtering channel 45. At this time, the membrane cleaning unit 2 starts and can clean the dialysis filter membrane 44 inside the filtering channel 45. After the membrane cleaning is completed, the control unit controls the flow guiding unit 3 and the membrane cleaning unit 2 to reset to the first position, which can ensure the dialysis efficiency of the dialysis filter membrane 44 and reduce the treatment time and cost.

[0036] Specifically, as Figures 1-4 shown, in order to ensure that the flow guiding unit 3 and the membrane cleaning unit 2 can rotate synchronously in the circumferential direction and thus realize the conversion between the first position and the second position, in this embodiment, annular turntables 43 are embedded and installed on both the upper surface and the lower surface of the middle disk frame 4. The annular turntables 43 are concentric with the middle disk frame 4;

[0037] The top and bottom of the housing sleeve 1 are rotatably installed with circular turntables 10. Among them, the diversion unit 3 and the membrane cleaning unit are both installed between the circular turntable 10 and the annular turntable 43. Through holes 430 are provided at positions on the annular turntable 43 where the diversion unit 3 and the membrane cleaning unit 2 are connected. Such a structural setting enables the diversion unit 3 and the membrane cleaning unit 2 to rotate synchronously when the annular turntable 43 rotates around the center of the middle plate frame 4, achieving the effect of the diversion unit 3 and the membrane cleaning unit 2 switching between the first position and the second position.

[0038] Specifically, as Figures 2-4 shown, in order to realize the rotation control of the diversion unit 3 and the membrane cleaning unit 2, in this embodiment, the control unit includes a motor 40 and a synchronous frame A41. The motor 40 is installed at the center of the middle plate frame 4. The synchronous frame A41 connects the diversion unit 3 and the membrane cleaning unit 2, and the output shaft of the motor 40 is connected to the center of the synchronous frame A41. Therefore, when the motor 40 operates, it can drive the synchronous frame A41 to rotate, thereby realizing the rotation control of the diversion unit 3 and the membrane cleaning unit 2.

[0039] Specifically, as Figure 4 shown, in order to realize the diversion and position conversion of the diversion unit 3, in this embodiment, the diversion unit 3 includes two upper and lower blood filter cartridges 32. The two blood filter cartridges 32 are respectively fixed on the surfaces of the two annular turntables 43. The two blood filter cartridges 32 are respectively connected to the two circular turntables 10 through blood conduits 31. A blood conduit joint 30 connected to the blood conduit 31 is installed outside the circular turntable 10. The outer sides of the two blood filter cartridges 32 are fixedly connected through a synchronous frame B42. Therefore, the entire diversion unit 3 can rotate integrally following the rotation of the annular turntable 43, and the blood conduit 31 is connected to the blood vessels inside the hemodialyzer through the blood conduit joint 30.

[0040] Specifically, as Figures 1-3 shown, in order to realize the position conversion of the membrane cleaning unit 2, in this embodiment, the membrane cleaning unit 2 includes an upper membrane cleaning mechanism 22 and a lower membrane cleaning mechanism 23. The upper membrane cleaning mechanism 22 and the lower membrane cleaning mechanism 23 are respectively installed on the surfaces of the two annular turntables 43. The outer sides of the upper membrane cleaning mechanism 22 and the lower membrane cleaning mechanism 23 are fixedly connected through a synchronous frame B42. The upper membrane cleaning mechanism 22 and the lower membrane cleaning mechanism 23 are respectively connected to the two circular turntables 10 through membrane cleaning fluid pipes 21. A membrane cleaning fluid pipe joint 20 connected to the upper membrane cleaning mechanism 22 and the lower membrane cleaning mechanism 23 is installed outside the circular turntable 10. The upper membrane cleaning mechanism 22 and the lower membrane cleaning mechanism 23 are connected to the external liquid supply device and liquid suction device through the membrane cleaning fluid pipe joint 20. When membrane cleaning is required, the membrane cleaning fluid is provided to the upper membrane cleaning mechanism 22 and the lower membrane cleaning mechanism 23 by the liquid supply device. After the membrane cleaning is completed, the membrane cleaning fluid is sucked out by the liquid suction device to realize the membrane cleaning of the dialysis filter membrane 44.

[0041] Embodiment 2

[0042] As Figures 5-7 shown, this embodiment provides a technical solution: on the basis of Embodiment 1, in order to realize the cleaning of the dialysis filter membrane 44, in this embodiment, the upper cleaning membrane mechanism 22 includes an upper cleaning membrane cylinder 220 and an upper cleaning membrane assembly 221 installed inside the upper cleaning membrane cylinder 220. Among them, the upper cleaning membrane assembly 221 includes an upper fixed plate 2210 fixed above the inner wall of the upper cleaning membrane cylinder 220, an upper washing cover 2211 arranged below the upper fixed plate 2210, and an upper pipe 2212 that connects the space above the upper fixed plate 2210 in the upper cleaning membrane cylinder 220 with the inner space of the upper washing cover 2211;

[0043] The lower cleaning membrane mechanism 23 includes a lower cleaning membrane cylinder 230 and a lower cleaning membrane assembly 231 installed inside the lower cleaning membrane cylinder 230. Among them, the lower cleaning membrane assembly 231 includes a lower fixed plate fixed to the inner wall of the lower cleaning membrane cylinder 230, a lower washing cover 2311 arranged above the lower fixed plate, and a lower pipe 2312 that connects the space below the lower fixed plate in the lower cleaning membrane cylinder 230 with the inner space of the lower washing cover 2311. When cleaning the dialysis filter membrane 44, the upper washing cover 2211 and the lower washing cover 2311 are respectively covered at both ends of the filtration channel 45, and then the cleaning liquid is injected from below the filtration channel 45 by the liquid supply device to perform reverse cleaning on the dialysis filter membrane 44 in the filtration channel 45, so as to realize the cleaning of the dialysis filter membrane 44.

[0044] Specifically, as Figures 5-9 shown, in order to improve the cleaning efficiency of the dialysis filter membrane 44 and reduce the time when the device is in the cleaning position, in this embodiment, an upper movable control device 2213 and a lower movable control device 2313 are respectively installed on the upper fixed plate 2210 and the lower fixed plate. The upper movable control device 2213 and the lower movable control device 2313 can respectively control the upper washing cover 2211 and the lower washing cover 2311 to move in the vertical direction, so that the upper washing cover 2211 and the lower washing cover 2311 can be inserted into the filtration channel 45. In this way, the cleaning space formed by the inner spaces of the upper washing cover 2211 and the lower washing cover 2311 and the filtration channel 45 can be reduced, so that the contact between the cleaning liquid and the dialysis filter membrane 44 is better, and the cleaning efficiency of the dialysis filter membrane 44 is improved.

[0045] Specifically, in order to enable the upper washing cover 2211 and the lower washing cover 2311 to move in the vertical direction and move into the filtration channel 45 when reaching the cleaning position to reduce the cleaning space, the upper pipe 2212 and the lower pipe 2312 are made of bellows.

[0046] Specifically, the upper movable control device 2213 and the lower movable control device 2313 adopt air cylinders, and the piston rods of the air cylinders are connected to the upper washing cover 2211 and the lower washing cover 2311.

[0047] Specifically, to ensure the stability of the upper cleaning cover 2211 and the lower cleaning cover 2311 during movement, limiting protrusions 2214 are provided on the outer walls of the upper cleaning cover 2211 and the lower cleaning cover 2311. Limiting grooves adapted to the limiting protrusions 2214 are provided on the inner walls of the upper cleaning film cylinder 220 and the lower cleaning film cylinder 230. The limiting grooves are opened vertically. Through the limitation of the limiting protrusions 2214 and the limiting grooves, the upper cleaning cover 2211 and the lower cleaning cover 2311 are more stable during movement.

[0048] Specifically, as Figures 5-9 shown, to further improve the cleaning efficiency of the dialysis filter membrane 44, in this embodiment, an installation cavity 2315 is formed inside the lower cleaning cover 2311. A perforated plate 2310 is provided on the surface of the installation cavity 2315, and an ultrasonic generator 2314 is provided inside the installation cavity 2315. In this way, when cleaning the dialysis filter membrane 44, the ultrasonic generator 2314 can emit ultrasonic waves to cause the cleaning liquid in the cleaning space to oscillate, thereby improving the cleaning effect.

[0049] In the above text, the exemplary embodiments of the solutions proposed by the present disclosure have been described in detail with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above specific embodiments, and various combinations of the technical features and structures proposed by the present disclosure can be made without exceeding the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A filter for the interior of a hemodialyzer, characterized in that, It includes: A housing sleeve (1); A middle disc frame (4) which is installed inside the housing sleeve (1). A filtering channel (45) for passing blood is provided on the middle disc frame (4), and a dialysis filter membrane (44) is installed in the filtering channel (45); A diversion unit (3) which is arranged inside the housing sleeve (1) and is used to guide blood to flow through the filtering channel (45); A membrane cleaning unit (2) which is arranged inside the housing sleeve (1) and is used to clean the dialysis filter membrane (44) regularly; A control unit which is arranged inside the housing sleeve (1) and is used to control the synchronous circumferential rotation of the diversion unit (3) and the membrane cleaning unit (2); Wherein, the membrane cleaning unit (2) and the diversion unit (3) can move to a first position and a second position under the control of the control unit. The first position is the working position where the membrane cleaning unit (2) is separated from the filtering channel (45) and the diversion unit (3) coincides with the filtering channel (45). The second position is the membrane cleaning position where the membrane cleaning unit (2) coincides with the filtering channel (45) and the diversion unit (3) is separated from the filtering channel (45).

2. The filter for the interior of a hemodialyzer according to claim 1, characterized in that, Ring-shaped turntables (43) are embedded and installed on both the upper surface and the lower surface of the middle disc frame (4), and the ring-shaped turntables (43) are concentric with the middle disc frame (4); Circular turntables (10) are rotatably installed at both the top and the bottom of the housing sleeve (1). Among them, the diversion unit (3) and the membrane cleaning unit are both installed between the circular turntable (10) and the ring-shaped turntable (43). Through holes (430) are provided at positions on the ring-shaped turntable (43) where the diversion unit (3) and the membrane cleaning unit (2) are connected.

3. A filter for the interior of a hemodialyzer according to claim 2, characterized in that, The control unit includes a motor (40) and a synchronous frame A (41). The motor (40) is installed at the center of the middle disc frame (4). The synchronous frame A (41) connects the diversion unit (3) and the membrane cleaning unit (2), and the output shaft of the motor (40) is connected to the center of the synchronous frame A (41).

4. The filter for the interior of a hemodialyzer according to claim 2, characterized in that, The diversion unit (3) includes two upper and lower blood filter cylinders (32). The two blood filter cylinders (32) are respectively fixed on the surfaces of the two ring-shaped turntables (43). The two blood filter cylinders (32) are respectively connected to the two circular turntables (10) through blood conduits (31). A blood conduit joint (30) connected to the blood conduit (31) is installed outside the circular turntable (10). The outer sides of the two blood filter cylinders (32) are fixedly connected through a synchronous frame B (42).

5. A filter for the interior of a hemodialyzer according to claim 2, characterized in that, The film cleaning unit (2) includes an upper film cleaning mechanism (22) and a lower film cleaning mechanism (23). The upper film cleaning mechanism (22) and the lower film cleaning mechanism (23) are respectively installed on the surfaces of two annular turntables (43). The outer sides of the upper film cleaning mechanism (22) and the lower film cleaning mechanism (23) are fixedly connected through a synchronous frame B (42). The upper film cleaning mechanism (22) and the lower film cleaning mechanism (23) are respectively connected to two circular turntables (10) through film cleaning liquid pipes (21). A film cleaning liquid pipe joint (20) connected to the upper film cleaning mechanism (22) and the lower film cleaning mechanism (23) is installed outside the circular turntable (10).

6. The filter for the interior of a hemodialyzer according to claim 5, characterized in that, The upper film cleaning mechanism (22) includes an upper film cleaning cylinder (220) and an upper film cleaning assembly (221) installed inside the upper film cleaning cylinder (220). Among them, the upper film cleaning assembly (221) includes: An upper fixed plate (2210) fixed above the inner wall of the upper film cleaning cylinder (220); An upper washing cover (2211) arranged below the upper fixed plate (2210); An upper pipe (2212) that connects the space above the upper fixed plate (2210) in the upper film cleaning cylinder (220) to the inner space of the upper washing cover (2211); The lower film cleaning mechanism (23) includes a lower film cleaning cylinder (230) and a lower film cleaning assembly (231) installed inside the lower film cleaning cylinder (230). Among them, the lower film cleaning assembly (231) includes: A lower fixed plate fixed to the inner wall of the lower film cleaning cylinder (230); A lower washing cover (2311) arranged above the lower fixed plate; A lower pipe (2312) that connects the space below the lower fixed plate in the lower film cleaning cylinder (230) to the inner space of the lower washing cover (2311).

7. The filter for the interior of a hemodialyzer according to claim 6, characterized in that, An upper movable control device (2213) and a lower movable control device (2313) are respectively installed on the upper fixed plate (2210) and the lower fixed plate. The upper movable control device (2213) and the lower movable control device (2313) can respectively control the upper washing cover (2211) and the lower washing cover (2311) to move in the vertical direction, so that the upper washing cover (2211) and the lower washing cover (2311) can be inserted into the filter channel (45).

8. A filter for the interior of a hemodialyzer according to claim 7, characterized in that, The upper pipe (2212) and the lower pipe (2312) are made of corrugated pipes.

9. A filter for the interior of a hemodialyzer according to claim 7, characterized in that, The upper movable control device (2213) and the lower movable control device (2313) adopt air cylinders, and the piston rods of the air cylinders are connected to the upper washing cover (2211) and the lower washing cover (2311).

10. A filter for the interior of a hemodialyzer according to claim 7, characterized in that, An installation cavity (2315) is opened inside the lower washing cover (2311). A hole plate (2310) is arranged on the surface of the installation cavity (2315), and an ultrasonic generator (2314) is arranged inside the installation cavity (2315).

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