Hollow fiber membrane dialysis device easy to clean

Abstract

The utility model discloses a hollow fiber membrane dialysis device easy to clean, which relates to the technical field of membrane dialysis and comprises a dialyzer main body and a gas-liquid flushing component, a gas-liquid inlet pipe is arranged at the upper end of one side of the dialyzer main body, and a gas-liquid outlet pipe is arranged at the lower end of one side of the dialyzer main body; the gas-liquid flushing assembly comprises a three-way connector, a liquid input pipeline, a gas input pipeline and a waste liquid discharging pipeline, one end of the three-way connector is detachably connected with the gas-liquid inlet pipe, one end of the liquid input pipeline is detachably connected with one end of the three-way connector, and one end of the gas input pipeline is detachably connected with one end of the three-way connector; and one end of the waste liquid discharge pipeline is detachably connected with the gas-liquid outlet pipe. The problems that an existing hollow fiber membrane dialysis device is inconvenient to clean and low in efficiency, cleaning dead angles easily exist, and the reliability of the device is reduced due to repeated disassembly and assembly are solved.

Description

Technical Field

[0001] This utility model relates to the field of membrane dialysis technology, specifically to an easy-to-clean hollow fiber membrane dialysis device. Background Technology

[0002] Hollow fiber membrane dialysis is a medical device used for blood purification. Its dialysis principle is as follows: When blood flows through the hollow core of the hollow fiber membrane, toxins and excess water in the blood diffuse to the dialysate on the outside of the membrane through the selective permeability of the semi-permeable membrane, ultimately achieving blood purification.

[0003] Currently, dialysis devices operating on this principle face significant cleaning challenges after use: large molecular toxins and excess water that diffuse to the outside of the membrane easily deposit on the outer surface of the hollow fiber membrane and within the chamber. Existing dialysis devices lack a flushing structure, making it difficult to target these deposits for cleaning, necessitating disassembly and separate cleaning. This traditional disassembly and cleaning method is not only cumbersome and time-consuming, but repeated disassembly and reassembly can also damage seals, affecting the device's sealing performance and potentially causing the hollow fiber membrane to break. Furthermore, simple liquid flushing has blind spots and is ineffective at cleaning certain sticky deposits.

[0004] Therefore, there is an urgent need to develop an easy-to-clean hollow fiber membrane dialysis device that is adapted to the principle of hollow fiber membrane dialysis and can effectively solve the problem of toxin and water deposition on the outer surface of the membrane. Utility Model Content

[0005] Based on this, and in response to the above problems, this utility model proposes an easy-to-clean hollow fiber membrane dialysis device, which solves the problems of inconvenient cleaning, low efficiency, easy existence of cleaning dead corners, and repeated disassembly and reassembly leading to a decrease in equipment reliability of current hollow fiber membrane dialysis devices.

[0006] The technical solution of this utility model is:

[0007] An easy-to-clean hollow fiber membrane dialysis device includes a dialyzer body and a gas-liquid flushing assembly. The dialyzer body has a gas-liquid inlet pipe at the upper end of one side and a gas-liquid outlet pipe at the lower end.

[0008] The gas-liquid flushing assembly includes a tee connector, a liquid inlet pipe, a gas inlet pipe, and a waste liquid outlet pipe. One end of the tee connector is detachably connected to the gas-liquid inlet pipe, one end of the liquid inlet pipe is detachably connected to one end of the tee connector, and the other end can be connected to a cleaning fluid storage device. One end of the gas inlet pipe is detachably connected to one end of the tee connector, and the other end can be connected to a clean gas storage device. The end of the gas inlet pipe connected to the tee connector extends into the internal cavity of the tee connector. One end of the waste liquid outlet pipe is detachably connected to the gas-liquid outlet pipe, and the other end can be connected to a waste liquid storage device.

[0009] The liquid input pipeline is equipped with a liquid supply power unit and a liquid supply valve in sequence. The liquid supply power unit and the liquid supply valve are arranged along the direction of cleaning liquid transportation and are detachably connected to the liquid input pipeline. The gas input pipeline is equipped with a gas supply power unit and a gas valve in sequence. The gas supply power unit and the gas valve are arranged along the direction of clean gas transportation and are detachably connected to the gas input pipeline. The waste liquid discharge pipeline is equipped with a waste liquid valve, which is detachably connected to the waste liquid discharge pipeline.

[0010] Preferably, the dialyzer body includes a filter unit and a housing assembly. The housing assembly includes a mounting housing, an upper end cover, and a lower end cover. The upper end cover and the lower end cover are respectively disposed at both ends of the mounting housing and are detachably connected to both ends of the mounting housing. The mounting housing has a filter chamber that extends through both ends of the mounting housing. The filter unit is disposed in the filter chamber and is detachably connected to both ends of the mounting housing. The two ends of the filter unit respectively seal the two ends of the filter chamber. The gas-liquid inlet pipe and the gas-liquid outlet pipe are fixedly disposed on the mounting housing and are respectively connected to the filter chamber.

[0011] Preferably, a blood inlet pipe is fixedly provided in the middle of the upper end of the upper cover, the blood inlet pipe is connected to the filter unit, and the lower end of the upper cover is sleeved on the outside of one end of the mounting housing and is threadedly connected to the mounting housing.

[0012] Preferably, a blood outlet pipe is fixedly provided in the middle of the lower end of the lower end cover, the blood outlet pipe is connected to the filter unit, and the upper end of the lower end cover is sleeved on the outside of the other end of the mounting housing and is threadedly connected to the mounting housing.

[0013] Preferably, the other side of the mounting housing is provided with a dialysate inlet pipe and a dialysate outlet pipe. The dialysate inlet pipe is fixedly installed at the upper end of the mounting housing. One end of the dialysate inlet pipe is connected to the filter chamber, and the other end is provided with a dialysate input pipe. One end of the dialysate input pipe is detachably connected to the dialysate inlet pipe, and the other end can be connected to an external dialysate storage device. The dialysate outlet pipe is fixedly installed at the lower end of the mounting housing. One end of the dialysate outlet pipe is connected to the filter chamber, and the other end is provided with a dialysate discharge pipe. One end of the dialysate discharge pipe is detachably connected to the dialysate outlet pipe, and the other end can be connected to an external dialysate collection device.

[0014] Preferably, a dialysate pump body and a dialysate valve are sequentially provided on the dialysate inlet pipe. The dialysate pump body and the dialysate valve are arranged along the dialysate delivery direction and are detachably connected to the dialysate inlet pipe. A drain valve is provided on the dialysate outlet pipe and is detachably connected to the dialysate outlet pipe.

[0015] Preferably, the filter unit includes a pair of end mounting assemblies and a plurality of hollow fiber membrane tubes, the plurality of hollow fiber membrane tubes being disposed between the pair of end mounting assemblies and having both ends detachably connected to the pair of end mounting assemblies respectively, the pair of end mounting assemblies being located at both ends of the filter chamber and being threadedly connected to the inner sidewalls of both ends of the mounting housing respectively.

[0016] Preferably, the end-mounting assembly includes a connecting shell, a connecting end, and a locking sleeve. One end of the connecting shell has a fixing slot, and the connecting shell is threadedly connected to the mounting shell. The end of the connecting shell with the fixing slot faces outward from the mounting shell. The connecting end is disposed in the fixing slot and inserted into the fixing slot. The connecting end has several connecting slots that penetrate the connecting end. Each of the several connecting slots has a connecting structure, and the connecting structure is inserted into the connecting slot. Both ends of several hollow fiber membrane tubes penetrate the connecting shell of a pair of end-mounting assemblies and are fixedly connected to the connecting structure. The hollow fiber membrane tubes are slidably connected to the connecting shell. One end of the locking sleeve is disposed in the fixing slot and is threadedly connected to the fixing slot. The end of the locking sleeve located in the fixing slot abuts against the connecting end and the connecting structure. The locking sleeve has a communication port that cooperates with the several hollow fiber membrane tubes.

[0017] Preferably, the locking sleeve at the upper end abuts against the upper end cover, forming a liquid inlet distribution chamber between them, with the blood inlet tube and the connecting port respectively connected to the liquid inlet distribution chamber; the locking sleeve at the lower end abuts against the lower end cover, forming a liquid outlet collection chamber between them, with the blood outlet tube and the connecting port respectively connected to the liquid outlet collection chamber.

[0018] Preferably, the connection structure includes a connecting pipe head and a plug pipe head. The connecting pipe head is sleeved on one end of the hollow fiber membrane tube and is fixedly connected to the hollow fiber membrane tube. The plug pipe head is sleeved on the outside of the connecting pipe head and is threadedly connected to the connecting pipe head. The plug pipe head is slidably connected to the hollow fiber membrane tube. The plug pipe head is inserted into the connection groove and is detachably connected to the connection groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. It achieves efficient online cleaning without disassembly, is easy to operate, and has high cleaning efficiency.

[0021] 2. The gas-liquid mixed flushing mode can effectively remove stubborn deposits on the outer surface of the membrane and in the dead corners of the chamber, resulting in a more thorough cleaning.

[0022] 3. The modular structure design makes the device easy to assemble, maintain and replace parts, resulting in a long service life and low overall cost.

[0023] 4. The sealing structure is reliable. Through the design of multiple sealing rings, it ensures that there is no risk of leakage during dialysis and cleaning. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the frame structure of an easy-to-clean hollow fiber membrane dialysis device as described in an embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the main body of the dialyzer described in this embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional structural diagram of the dialyzer body described in an embodiment of the present invention;

[0028] Figure 4 This is a partial exploded structural diagram of the dialyzer body described in this embodiment of the present invention;

[0029] Figure 5 This is a partial cross-sectional structural diagram of the dialyzer body described in this embodiment of the present invention;

[0030] Explanation of reference numerals in the attached figures:

[0031] 10-Dialyzer body, 11-Gas-liquid flushing assembly, 12-Gas-liquid inlet pipe, 13-Gas-liquid outlet pipe, 14-T-connector, 15-Liquid input pipe, 16-Gas input pipe, 17-Waste liquid discharge pipe, 18-Liquid supply power unit, 19-Liquid supply valve, 20-Gas supply power unit, 21-Gas valve, 22-Waste liquid valve, 23-Filter unit, 24-Outer casing assembly, 25-Mounting housing, 26-Upper end cover, 27-Lower end cover, 28-Filter chamber, 29-Blood inlet pipe, 30-Blood outlet pipe, 31-Dialyzed fluid inlet pipe 32-Dialysis fluid outlet pipe, 33-Dialysis fluid inlet pipe, 34-Dialysis fluid outlet pipe, 35-Dialysis fluid pump body, 36-Dialysis fluid valve, 37-Discharge valve, 38-End mounting assembly, 39-Hollow fiber membrane tube, 40-Connecting housing, 41-Connecting end, 42-Locking sleeve, 43-Fixing slot, 44-Connecting slot, 45-Connecting structure, 46-Inlet distribution chamber, 47-Outlet collection chamber, 48-Connecting tube head, 49-Insertion tube head, 50-Connecting port, 51-First sealing ring, 52-Second sealing ring, 53-Third sealing ring. Detailed Implementation

[0032] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0033] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0036] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0038] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0039] Example:

[0040] like Figures 1 to 5 As shown, this embodiment discloses an easy-to-clean hollow fiber membrane dialysis device, including a dialyzer body 10 and a gas-liquid flushing assembly 11. The dialyzer body 10 has a gas-liquid inlet pipe 12 at the upper end of one side and a gas-liquid outlet pipe 13 at the lower end.

[0041] The gas-liquid flushing assembly 11 includes a tee connector 14, a liquid input pipe 15, a gas input pipe 16, and a waste liquid discharge pipe 17. One end of the tee connector 14 is detachably connected to the gas-liquid inlet pipe 12. One end of the liquid input pipe 15 is detachably connected to one end of the tee connector 14, and the other end can be connected to a cleaning fluid storage device. One end of the gas input pipe 16 is detachably connected to one end of the tee connector 14, and the other end can be connected to a clean gas storage device. One end of the waste liquid discharge pipe 17 is detachably connected to the gas-liquid outlet pipe 13, and the other end can be connected to a waste liquid storage device.

[0042] A liquid supply power unit 18 and a liquid supply valve 19 are sequentially provided on the liquid input pipeline 15. The liquid supply power unit 18 and the liquid supply valve 19 are arranged along the direction of cleaning liquid transportation and are detachably connected to the liquid input pipeline 15. A gas supply power unit 20 and a gas valve 21 are sequentially provided on the gas input pipeline 16. The gas supply power unit 20 and the gas valve 21 are arranged along the direction of clean gas transportation and are detachably connected to the gas input pipeline 16. A waste liquid valve 22 is provided on the waste liquid discharge pipeline 17 and is detachably connected to the waste liquid discharge pipeline 17.

[0043] The dialyzer body 10 serves as the core carrier for blood purification. It forms a closed-loop pathway with the gas-liquid inlet pipe 12, the gas-liquid outlet pipe 13, and the gas-liquid flushing assembly 11. The gas-liquid flushing assembly 11 uses a tee connector 14 as a linkage hub to achieve a detachable connection between the liquid input pipe 15, the gas input pipe 16, and the dialyzer body 10. The connection method can employ existing pipe connection technologies, such as flange connections or threaded connections. Similarly, the waste liquid discharge pipe 17 and the gas-liquid outlet pipe 13 can also employ existing pipe connection technologies.

[0044] During normal dialysis, the gas-liquid flushing assembly 11 is separated from the dialyzer body 10, and the gas-liquid inlet pipe 12 and gas-liquid outlet pipe 13 on the dialyzer body 10 are in a closed state. The liquid supply valve 19, gas valve 21 and waste liquid valve 22 are all closed to avoid affecting the purification operation.

[0045] When cleaning is required, connect the dialyzer body 10 to the gas-liquid flushing assembly 11, close the blood delivery pathway, start the liquid supply power unit 18 and the gas supply power unit 20, and open the corresponding liquid supply valve 19 and gas valve 21 to allow the cleaning fluid and clean gas to be introduced into the dialyzer body 10 simultaneously, forming a strong gas-liquid mixture to flush the stubborn deposits on the outer surface of the hollow fiber membrane and in the chamber. At the same time, open the waste liquid valve 22 to discharge the waste liquid containing the deposits to the external storage device.

[0046] This structure allows for flushing without disassembling the dialyzer body 10, solving the problems of difficult-to-clean deposits and cumbersome separate cleaning operations in traditional dialysis devices. The gas-liquid mixing flushing method significantly improves cleaning efficiency, and the detachable design of each pipe and connector facilitates component maintenance and individual replacement. During use, continuous flushing for 2-5 minutes is generally required.

[0047] The liquid supply power unit 18 can be a liquid transfer pump that can achieve the function of this utility model in the prior art, and the air supply power unit 20 can be a fan that can achieve the function of this utility model in the prior art.

[0048] As a further preferred embodiment, the end of the gas input pipe 16 connected to the tee connector 14 extends into the internal cavity of the tee connector 14. When the cleaning fluid enters the tee connector 14, it impacts the end of the gas input pipe 16, creating a vortex, thereby enhancing the gas-liquid mixing effect.

[0049] To facilitate the assembly of the filter unit 23 and the outer casing assembly 24, and to facilitate blood delivery, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the dialyzer body 10 includes a filter unit 23 and an outer casing assembly 24. The outer casing assembly 24 includes a mounting housing 25, an upper end cover 26, and a lower end cover 27. The upper end cover 26 and the lower end cover 27 are respectively disposed at both ends of the mounting housing 25 and are detachably connected to both ends of the mounting housing 25. The mounting housing 25 has a filter chamber 28 that passes through both ends of the mounting housing 25. The filter unit 23 is disposed in the filter chamber 28 and is detachably connected to the mounting housing 25 at both ends. The two ends of the filter unit 23 respectively seal the two ends of the filter chamber 28. The gas-liquid inlet pipe 12 and the gas-liquid outlet pipe 13 are fixedly disposed on the mounting housing 25 and are respectively connected to the filter chamber 28.

[0050] As a further preferred embodiment, a blood inlet pipe 29 is fixedly provided at the middle of the upper end of the upper cover 26, the blood inlet pipe 29 is connected to the filter unit 23, and the lower end of the upper cover 26 is sleeved on the outside of one end of the mounting housing 25 and is threadedly connected to the mounting housing 25.

[0051] As a further preferred embodiment, a blood outlet pipe 30 is fixedly provided at the middle of the lower end of the lower end cover 27, the blood outlet pipe 30 is connected to the filter unit 23, and the upper end of the lower end cover 27 is sleeved on the outside of the other end of the mounting housing 25 and is threadedly connected to the mounting housing 25.

[0052] The outer casing assembly 24 consists of a mounting housing 25, an upper end cover 26, and a lower end cover 27. These three components are connected by threads for detachable assembly. The filter chamber 28 within the mounting housing 25 provides a stable installation space for the filter unit 23. The upper end cover 26 and lower end cover 27 are respectively fitted onto the outer sides of both ends of the mounting housing 25 and secured by threads. The blood inlet pipe 29 and blood outlet pipe 30, fixed at their upper and lower ends respectively, communicate with the filter unit 23, forming a blood flow channel. The threaded connection facilitates the easy assembly and disassembly of the upper end cover 26 and lower end cover 27 from the mounting housing 25, enabling subsequent maintenance and replacement of the filter unit 23. Simultaneously, this structure provides a sealed and stable blood delivery pathway, effectively ensuring the smoothness and sealing of blood delivery during dialysis and preventing leakage problems.

[0053] To facilitate the delivery of dialysis fluid, this embodiment is an improvement upon the previous embodiment. The difference lies in that a dialysis fluid inlet pipe 31 and a dialysis fluid outlet pipe 32 are provided on the other side of the mounting housing 25. The dialysis fluid inlet pipe 31 is fixedly installed on the upper end of the mounting housing 25. One end of the dialysis fluid inlet pipe 31 is connected to the filter chamber 28, and the other end is provided with a dialysis fluid input pipe 33. One end of the dialysis fluid input pipe 33 is detachably connected to the dialysis fluid inlet pipe 31, and the other end can be connected to an external dialysis fluid storage device. The dialysis fluid outlet pipe 32 is fixedly installed on the lower end of the mounting housing 25. One end of the dialysis fluid outlet pipe 32 is connected to the filter chamber 28, and the other end is provided with a dialysis fluid discharge pipe 34. One end of the dialysis fluid discharge pipe 34 is detachably connected to the dialysis fluid outlet pipe 32, and the other end can be connected to an external dialysis fluid collection device.

[0054] As a further preferred embodiment, the dialysate inlet pipe 33 is provided with a dialysate pump body 35 and a dialysate valve 36 in sequence. The dialysate pump body 35 and the dialysate valve 36 are arranged along the dialysate delivery direction and are detachably connected to the dialysate inlet pipe 33 respectively. The dialysate outlet pipe 34 is provided with an outlet valve 37, which is detachably connected to the dialysate outlet pipe 34.

[0055] The dialysate inlet pipe 31 and dialysate outlet pipe 32 on the other side of the housing 25 are connected to external dialysate storage and collection equipment via detachable dialysate input pipe 33 and dialysate discharge pipe 34, respectively. The connection methods also employ existing pipe connection technologies, such as flange connections and threaded connections. A dialysate pump body 35 and a dialysate valve 36 are sequentially installed along the delivery direction on the dialysate input pipe 33, and a discharge valve 37 is installed on the dialysate discharge pipe 34. Both the pump body and valves are detachably connected to their corresponding pipes. The dialysate pump body 35 provides power for dialysate delivery, and the valve assembly precisely controls the on / off state and flow rate of the dialysate, ensuring stable and controllable dialysate delivery to meet the process requirements of blood purification. The detachable design of each component and pipe reduces maintenance difficulty, allowing for individual replacement of faulty components without replacing the entire piping system, effectively reducing operating costs. The connection methods between each pump, valve, and pipe can employ existing technologies, such as flange connections and threaded connections.

[0056] To facilitate the assembly and disassembly of the filter unit 23, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the filter unit 23 includes a pair of end mounting assemblies 38 and a plurality of hollow fiber membrane tubes 39. The plurality of hollow fiber membrane tubes 39 are disposed between the pair of end mounting assemblies 38, and both ends are detachably connected to the pair of end mounting assemblies 38 respectively. The pair of end mounting assemblies 38 are located at both ends of the filter chamber 28 and are threadedly connected to the inner sidewalls of both ends of the mounting housing 25 respectively.

[0057] The filtration unit 23 consists of a pair of end-mounting assemblies 38 and several hollow fiber membrane tubes 39. The hollow fiber membrane tubes 39 are arranged in parallel between the pair of end-mounting assemblies 38, with each end detachably connected to one of the end-mounting assemblies 38. The pair of end-mounting assemblies 38 are fixed to both ends of the filtration chamber 28 via threaded connections, sealing the filtration chamber 28 and forming an independent blood filtration space. The parallel arrangement of multiple hollow fiber membrane tubes 39 significantly increases the contact area and dialysis efficiency for blood purification. The detachable connection design between the end-mounting assemblies 38, the hollow fiber membrane tubes 39, and the mounting housing 25 allows for individual replacement of a damaged hollow fiber membrane tube 39 without requiring the entire filtration unit 23 to be replaced, significantly reducing maintenance costs and extending the overall service life of the device.

[0058] To improve the dialysis effect, this embodiment is an improvement on the above embodiment. The difference lies in that the end-mounting assembly 38 includes a connecting housing 40, a connecting end 41, and a locking sleeve 42. One end of the connecting housing 40 has a fixing slot 43, and the connecting housing 40 is threadedly connected to the mounting housing 25. The end of the connecting housing 40 with the fixing slot 43 faces outwards from the mounting housing 25. The connecting end 41 is disposed within the fixing slot 43 and is inserted into the fixing slot 43. The connecting end 41 has several connecting slots 44 that penetrate the connecting end 41. Each connecting slot 44 is provided with a connecting structure 45, which is inserted into the connecting slot 44. Several hollow fiber membrane tubes 39 have their ends passing through the connecting shells 40 in a pair of end mounting assemblies 38 and are fixedly connected to the connecting structure 45. The hollow fiber membrane tubes 39 are slidably connected to the connecting shells 40. One end of the locking sleeve 42 is set in the fixing slot 43 and is threadedly connected to the fixing slot 43. The end of the locking sleeve 42 located in the fixing slot 43 abuts against the connecting end 41 and the connecting structure 45. The locking sleeve 42 is provided with a communication port 50 that cooperates with the several hollow fiber membrane tubes 39.

[0059] As a further preferred embodiment, the other end of the locking sleeve 42 in one of the end mounting assemblies 38 abuts against the upper end cover 26, and a liquid inlet distribution cavity 46 is formed between the locking sleeve 42 and the upper end cover 26, with the blood inlet pipe 29 and the connecting port 50 respectively communicating with the liquid inlet distribution cavity 46; the other end of the locking sleeve 42 in the other end mounting assembly 38 abuts against the lower end cover 27, and a liquid outlet collection cavity 47 is formed between the locking sleeve 42 and the lower end cover 27, with the blood outlet pipe 30 and the connecting port 50 respectively communicating with the liquid outlet collection cavity 47.

[0060] In the end-mounting assembly 38, the connecting housing 40 is fixed to the inner wall of the mounting housing 25 by threads. The connecting end 41 is inserted into the fixing slot 43 of the connecting housing 40, and the connecting structure 45 is inserted into the connecting slot 44. The locking sleeve 42 is then threaded to lock and fix the position, ensuring that the hollow fiber membrane tube 39 is securely connected. The locking sleeve 42 of one end-mounting assembly 38 abuts against the upper end cover 26 to form the inlet distribution chamber 46, and the blood inlet tube 29 is connected to this chamber. The locking sleeve 42 of the other end-mounting assembly 38 abuts against the lower end cover 27 to form the outlet collection chamber 47, and the blood outlet tube 30 is connected to this chamber. After the blood enters the inlet distribution chamber 46 through the blood inlet tube 29, it is evenly distributed to each hollow fiber membrane tube 39. After dialysis, it is discharged from the blood outlet tube 30 through the outlet collection chamber 47. The combination of plug-in and threaded locking not only ensures the structural connection is firm but also simplifies the disassembly and assembly process. The design of the inlet distribution chamber 46 and the outlet collection chamber 47 avoids the problem of uneven blood flow in certain areas, ensuring that each hollow fiber membrane tube 39 can fully perform its filtration function and improve the dialysis effect. At the same time, the abutment structure between the locking sleeve 42 and the end cap further enhances the overall sealing performance.

[0061] The connecting structure 45 includes a connecting tube head 48 and a plug tube head 49. The connecting tube head 48 is sleeved on one end of the hollow fiber membrane tube 39 and is fixedly connected to the hollow fiber membrane tube 39. The plug tube head 49 is sleeved on the outside of the connecting tube head 48 and is threadedly connected to the connecting tube head 48. The plug tube head 49 is slidably connected to the hollow fiber membrane tube 39. The plug tube head 49 is inserted into the connecting groove 44 and is detachably connected to the connecting groove 44.

[0062] The connecting structure 45 consists of a connecting tube head 48 and a insertion tube head 49. The connecting tube head 48 is sleeved and fixed to one end of the hollow fiber membrane tube 39. The insertion tube head 49 is threaded onto the outside of the connecting tube head 48 and slidably connected to the hollow fiber membrane tube 39. The insertion tube head 49 is inserted into the connecting groove 44 of the connecting end head 41 for a detachable connection, thus completing the fixation of the hollow fiber membrane tube 39 to the end mounting assembly 38. The double sleeve and threaded / insertion connection method ensures the connection strength between the hollow fiber membrane tube 39 and the end assembly, while reducing the difficulty of membrane tube installation and replacement. The threaded connection between the insertion tube head 49 and the connecting tube head 48 further enhances the sealing at the connection point, effectively preventing blood leakage and ensuring the safety and stability of the dialysis process.

[0063] As a further preferred embodiment, a first sealing ring 51 is provided within the fixing slot 43. The first sealing ring 51 is fitted onto the lower end of the connecting end 41, with one side of the first sealing ring 51 contacting the inner wall of the fixing slot 43 and the other side contacting the outer wall of the connecting end 41. The first sealing ring 51 can improve the sealing performance between the connecting end 41 and the fixing slot 43.

[0064] As a further preferred embodiment, a second sealing ring 52 is provided within the connecting groove 44. The second sealing ring 52 is sleeved on the outside of the connector 49, with one side of the second sealing ring 52 contacting the inner wall of the connecting groove 44 and the other side contacting the outer wall of the connector 49. The provision of the second sealing ring 52 can improve the sealing performance between the connector 49 and the connecting groove 44.

[0065] As a further preferred embodiment, the locking sleeve 42 is provided with a pair of third sealing rings 53. The pair of third sealing rings 53 are respectively embedded and installed at both ends of the locking sleeve 42. In one end mounting assembly 38, the third sealing ring 53 at one end of the locking sleeve 42 contacts the upper end cover 26, and the third sealing ring 53 at the other end contacts the connecting end 41 in the end mounting assembly 38. In the other end mounting assembly 38, the third sealing ring 53 at one end of the locking sleeve 42 contacts the lower end cover 27, and the third sealing ring 53 at the other end contacts the connecting end 41 in the end mounting assembly 38. The provision of the third sealing rings 53 can improve the sealing performance of the liquid inlet distribution chamber 46 and the liquid outlet collection chamber 47.

[0066] Working principle of this utility model:

[0067] This invention achieves efficient cleaning through the coordinated operation of the dialyzer body and the gas-liquid flushing assembly. During normal blood purification operations, the gas-liquid flushing assembly is separated from the dialyzer body, and the gas-liquid inlet and outlet pipes on the dialyzer body are closed. The supply valve, gas valve, and waste liquid valve in the gas-liquid flushing assembly are all closed. When cleaning of the dialyzer body is required, the dialyzer body is first connected to the gas-liquid flushing assembly, sealing off the blood transport pathways. Then, the liquid input pipe and gas input pipe are linked through a three-way connector, the liquid supply power unit is started, and the liquid supply valve is opened, allowing the cleaning fluid from the external cleaning fluid storage device to be delivered into the dialyzer body. Simultaneously, the gas supply power unit is started, and the gas valve is opened, allowing clean gas from the external clean gas storage device to be introduced synchronously. The cleaning fluid and clean gas mix in the three-way connector and flow channel, forming an unstable gas-liquid two-phase turbulent flow. The turbulence generates intense disturbances and varying fluid shear forces between the hollow fiber membrane bundles, effectively stripping and flushing away stubborn deposits attached to the outer surface of the membrane and dead corners of the chamber. During this process, the waste liquid valve on the waste liquid discharge pipe is opened simultaneously, and the flushed deposits flow with the waste liquid into the external waste liquid storage equipment through the pipe, thus achieving cleaning. After cleaning with this device, the flux of the hollow fiber membrane can be effectively restored. The membrane flux after cleaning can be restored to more than 95% of the initial value, and the risk of chemical cleaning agent residue is avoided.

[0068] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An easy-to-clean hollow fiber membrane dialysis device, characterized in that, It includes a dialyzer body (10) and a gas-liquid flushing assembly (11). The dialyzer body (10) has a gas-liquid inlet pipe (12) at the upper end and a gas-liquid outlet pipe (13) at the lower end. The gas-liquid flushing assembly (11) includes a three-way connector (14), a liquid input pipe (15), a gas input pipe (16), and a waste liquid discharge pipe (17). One end of the three-way connector (14) is detachably connected to the gas-liquid inlet pipe (12). One end of the liquid input pipe (15) is detachably connected to one end of the three-way connector (14), and the other end can be connected to a cleaning liquid storage device. One end of the gas input pipe (16) is detachably connected to one end of the three-way connector (14), and the other end can be connected to a clean gas storage device. One end of the gas input pipe (16) connected to the three-way connector (14) extends into the internal cavity of the three-way connector (14). One end of the waste liquid discharge pipe (17) is detachably connected to the gas-liquid outlet pipe (13), and the other end can be connected to a waste liquid storage device. A liquid supply power unit (18) and a liquid supply valve (19) are sequentially provided on the liquid input pipe (15). The liquid supply power unit (18) and the liquid supply valve (19) are arranged along the direction of cleaning liquid transportation and are detachably connected to the liquid input pipe (15). A gas supply power unit (20) and a gas valve (21) are sequentially provided on the gas input pipe (16). The gas supply power unit (20) and the gas valve (21) are arranged along the direction of clean gas transportation and are detachably connected to the gas input pipe (16). A waste liquid valve (22) is provided on the waste liquid discharge pipe (17). The waste liquid valve (22) is detachably connected to the waste liquid discharge pipe (17).

2. The easy-to-clean hollow fiber membrane dialysis device according to claim 1, characterized in that, The dialyzer body (10) includes a filter unit (23) and a housing assembly (24). The housing assembly (24) includes a mounting housing (25), an upper end cover (26), and a lower end cover (27). The upper end cover (26) and the lower end cover (27) are respectively disposed at both ends of the mounting housing (25) and are detachably connected to both ends of the mounting housing (25). The mounting housing (25) has a filter chamber (28) that passes through both ends of the mounting housing (25). The filter unit (23) is disposed in the filter chamber (28) and is detachably connected to both ends of the mounting housing (25). The two ends of the filter unit (23) respectively seal both ends of the filter chamber (28). The gas-liquid inlet pipe (12) and the gas-liquid outlet pipe (13) are fixedly disposed on the mounting housing (25) and are respectively connected to the filter chamber (28).

3. The easy-to-clean hollow fiber membrane dialysis device according to claim 2, characterized in that, The upper end cover (26) is fixedly provided with a blood inlet pipe (29) in the middle of the upper end. The blood inlet pipe (29) is connected to the filter unit (23). The lower end of the upper end cover (26) is sleeved on the outside of one end of the mounting housing (25) and is threadedly connected to the mounting housing (25).

4. The easy-to-clean hollow fiber membrane dialysis device according to claim 3, characterized in that, The lower end cover (27) is fixedly provided with a blood outlet pipe (30) in the middle of its lower end. The blood outlet pipe (30) is connected to the filter unit (23). The upper end of the lower end cover (27) is sleeved on the outside of the other end of the mounting housing (25) and is threadedly connected to the mounting housing (25).

5. The easy-to-clean hollow fiber membrane dialysis device according to claim 4, characterized in that, The other side of the mounting housing (25) is provided with a dialysate inlet pipe (31) and a dialysate outlet pipe (32). The dialysate inlet pipe (31) is fixedly installed at the upper end of the mounting housing (25). One end of the dialysate inlet pipe (31) is connected to the filter chamber (28), and the other end is provided with a dialysate input pipe (33). One end of the dialysate input pipe (33) is detachably connected to the dialysate inlet pipe (31), and the other end can be connected to an external dialysate storage device. The dialysate outlet pipe (32) is fixedly installed at the lower end of the mounting housing (25). One end of the dialysate outlet pipe (32) is connected to the filter chamber (28), and the other end is provided with a dialysate discharge pipe (34). One end of the dialysate discharge pipe (34) is detachably connected to the dialysate outlet pipe (32), and the other end can be connected to an external dialysate collection device.

6. The easy-to-clean hollow fiber membrane dialysis device according to claim 5, characterized in that, A dialysate pump body (35) and a dialysate valve (36) are sequentially provided on the dialysate inlet pipe (33). The dialysate pump body (35) and the dialysate valve (36) are arranged along the dialysate delivery direction and are detachably connected to the dialysate inlet pipe (33). A drain valve (37) is provided on the dialysate outlet pipe (34). The drain valve (37) is detachably connected to the dialysate outlet pipe (34).

7. The easy-to-clean hollow fiber membrane dialysis device according to claim 6, characterized in that, The filter unit (23) includes a pair of end mounting assemblies (38) and a plurality of hollow fiber membrane tubes (39). The plurality of hollow fiber membrane tubes (39) are disposed between the pair of end mounting assemblies (38) and are detachably connected at both ends to the pair of end mounting assemblies (38). The pair of end mounting assemblies (38) are located at both ends of the filter chamber (28) and are threadedly connected to the inner sidewalls at both ends of the mounting housing (25).

8. The easy-to-clean hollow fiber membrane dialysis device according to claim 7, characterized in that, The end mounting assembly (38) includes a connecting housing (40), a connecting end (41), and a locking sleeve (42). One end of the connecting housing (40) is provided with a fixing slot (43). The connecting housing (40) is threadedly connected to the mounting housing (25), and the end of the connecting housing (40) with the fixing slot (43) faces outward from the mounting housing (25). The connecting end (41) is set in the fixing slot (43) and is inserted into the fixing slot (43). The connecting end (41) is provided with several connecting slots (44) that penetrate the connecting end (41). Each of the several connecting slots (44) is provided with a connecting structure (45). (45) is inserted into the connecting slot (44). Both ends of several hollow fiber membrane tubes (39) pass through the connecting shell (40) in a pair of end mounting assemblies (38) and are fixedly connected to the connecting structure (45). The hollow fiber membrane tubes (39) are slidably connected to the connecting shell (40). One end of the locking sleeve (42) is set in the fixed slot (43) and is threadedly connected to the fixed slot (43). The end of the locking sleeve (42) located in the fixed slot (43) abuts against the connecting end (41) and the connecting structure (45). The locking sleeve (42) is provided with a communication port that cooperates with several hollow fiber membrane tubes (39).

9. The easy-to-clean hollow fiber membrane dialysis device according to claim 8, characterized in that, The upper locking sleeve (42) abuts against the upper end cover (26), forming a liquid distribution chamber (46) between them. The blood inlet pipe (29) and the connecting port (50) are respectively connected to the liquid distribution chamber (46). The lower locking sleeve (42) abuts against the lower end cover (27), forming a liquid collection chamber (47) between them. The blood outlet pipe (30) and the connecting port (50) are respectively connected to the liquid collection chamber (47).

10. The easy-to-clean hollow fiber membrane dialysis device according to claim 9, characterized in that, The connection structure (45) includes a connecting tube head (48) and a plug tube head (49). The connecting tube head (48) is sleeved on one end of the hollow fiber membrane tube (39) and is fixedly connected to the hollow fiber membrane tube (39). The plug tube head (49) is sleeved on the outside of the connecting tube head (48) and is threadedly connected to the connecting tube head (48). The plug tube head (49) is slidably connected to the hollow fiber membrane tube (39). The plug tube head (49) is inserted into the connecting groove (44) and is detachably connected to the connecting groove (44).

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