Multi-chamber hemodialyzer

Abstract

The invention belongs to the technical field of hemodialysis, and provides a multi-cavity hemodialyzer. The invention relates to a multi-chamber hemodialyzer which comprises a multi-chamber shell, a liquid storage cavity, a liquid exchange cavity, a liquid inlet pipe, a liquid outlet pipe, a liquid inlet pipe and a liquid outlet pipe, wherein the multi-chamber shell is provided with a liquid storage cavity and a liquid exchange cavity; an inlet of the exchange liquid cavity is communicated with the liquid storage cavity; a plurality of liquid storage cavities are arranged and are uniformly distributed; wherein dialysis liquid sequentially passes through the liquid storage cavity and enters the exchange liquid cavity; the filtering assembly is arranged in the multi-chamber shell and is used for filtering dialysis liquid; one end of the hemodialysis main body is communicated with an outlet of the exchange liquid cavity; the hemodialysis main body is used for hemodialysis; and the other end of the hemodialysis main body is communicated with the multi-chamber shell. In conclusion, the multi-chamber hemodialyzer is provided; therefore, the multi-cavity hemodialyzer is provided, the flowing stroke of dialysate can be increased, and the filtering and purifying effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hemodialysis, and in particular to a multi-chamber hemodialyzer. Background Art

[0002] Hemodialyzer, a key device used in hemodialysis treatment, removes toxins and excess water from the blood by simulating the filtration function of the kidneys; its main function is to remove harmful substances from the blood through solute exchange.

[0003] Traditional dialysis equipment uses a filter device that sets a filter assembly in a single filter chamber. This arrangement allows the dialysate to gather to a certain amount when entering the single filter chamber and then be filtered through the filter device. As a result, the dialysate has a short flow path, resulting in poor filtering effect.

[0004] Therefore, we propose a multi-chamber hemodialyzer that can increase the flow distance of dialysate and improve the filtering and purification effect. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides a multi-chamber hemodialyzer to improve the filtering and purification efficiency.

[0006] In a first aspect, the present invention provides a multi-chamber hemodialyzer, comprising: a multi-chamber shell, the multi-chamber shell having a liquid storage chamber and an exchange liquid chamber; wherein the inlet of the exchange liquid chamber is communicated with the liquid storage chamber; the liquid storage chamber is provided at multiple locations and is evenly distributed; wherein the dialysis liquid passes through the liquid storage chamber in sequence and enters the exchange liquid chamber; a filter component, the filter component is provided in the multi-chamber shell and is used to filter the dialysis liquid; and a hemodialysis body, one end of the hemodialysis body is communicated with the outlet of the exchange liquid chamber; the hemodialysis body is used for hemodialysis; the other end of the hemodialysis body is communicated with the multi-chamber shell.

[0007] Furthermore, the multi-chamber housing is also provided with a mounting cavity and a filtering slot cavity; the mounting cavity is provided in multiple locations and is located above the liquid storage cavity and communicated with the liquid storage cavity; the filtering slot cavity is provided below the liquid storage cavity. In actual use, the purpose of this design is to enable the dialysis liquid to achieve a multi-stroke filtering path, thereby facilitating the filtering of the dialysis liquid by increasing its filtering stroke.

[0008] Furthermore, it also includes a control component, the control component is provided with an opening and closing valve; the opening and closing valve is provided in multiple places, and is installed one by one in the liquid storage cavity and close to the direction of the filter slot cavity. Among them, in actual application, the design purpose of the opening and closing valve is to ensure one-way flow and realize an S-shaped flow path, so that multiple purifications can be achieved.

[0009] Furthermore, it also includes a liquid pushing component, which is provided with multiple locations and is installed one by one on the installation cavity; the liquid pushing group includes a pushing cylinder and a sealing piston, the sealing piston is fixedly installed on the output shaft of the pushing cylinder, and the sealing piston is slidably installed in the liquid storage cavity. In actual use, the purpose of this design is to facilitate the flow of dialysis liquid. In actual work, this design uses the principle of piston pump to promote the flow of liquid. Through the coordinated use of any two adjacent push components, not only can the flow of dialysis liquid be formed, but also different hydraulic pressures can be formed, and then different osmotic pressures can be formed for efficient filtration. In this way, effective filtration can be carried out according to the actual situation. Among them, when high-pressure filtration is required, in any two adjacent push components, when the sealing piston away from the main direction of the hemodialysis body moves downward quickly, the sealing piston next door rises slowly. Of course, at this time, the opening and closing valves of the two liquid storage chambers are opened. In this way, the high osmotic pressure dialysis liquid formed can be quickly filtered. On the other hand, when low-pressure osmotic filtration is required, the opposite is true. When the sealing piston away from the main direction of the hemodialysis body moves downward slowly, the sealing piston next door rises quickly; in this way, low osmotic pressure dialysis liquid can be formed, and low osmotic pressure can be formed for osmotic filtration. And the push cylinder is an electric cylinder, so that precise pushing can be achieved.

[0010] Furthermore, the filter slotted cavity is also provided with a mounting port and an outflow port, the mounting port is located on the multi-chamber housing and communicates with the outside; the outflow port is arranged in a direction away from the mounting port, and the liquid storage cavity is communicated with the exchange liquid cavity through the outflow port; the filter assembly comprises a filter cylinder, a filter group plug and two sealing spacer plugs; the filter cylinder is detachably mounted on the filter slotted cavity and is located at the mounting port; the two sealing spacer plugs are detachably mounted on the output shaft of the filter cylinder and are fixedly mounted in the axial direction and are abutted and sealed against the inner wall of the filter slotted cavity; wherein the straight-line distance between the two sealing spacer plugs is equal to the sum of the widths of adjacent liquid storage cavities, the filter group plug is mounted on the output shaft of the filter cylinder and is located between the two sealing spacer plugs. In actual use, the purpose of this design is to facilitate filtration and penetration. The two sealing plugs installed along the axis can form a closed flow channel between the two adjacent liquid storage chambers, so as to ensure the feasibility of the above-mentioned adjustment of the osmotic pressure. At the same time, the filter assembly used for filtration is installed between the two sealing plugs; in this way, filtration can be achieved through the filter assembly plug. The sealing plug is made of rubber material, so that it is easy to form an abutment seal.

[0011] Furthermore, the filter assembly also includes a mounting sleeve and a replacement slot plate; one end of the mounting sleeve is detachably mounted on the mounting port, and one end of the mounting sleeve is fixedly connected to the filter cylinder; the mounting sleeve is also provided with a replacement port, and the replacement port is located on one side of the mounting sleeve; the replacement slot plate is detachably mounted on the replacement port, and is sealed and connected to the replacement port. In actual use, the purpose of this design is to achieve the replaceability of the filter group plug; in actual work, when replacement is required, under the operation of the filter cylinder, that is, the output shaft of the filter cylinder is moved to the direction of the replacement port, and then the replacement slot plate on the replacement port is removed, and then a new filter group plug is replaced, and finally the replacement slot plate is installed, so that quick use can be achieved.

[0012] Furthermore, the filter plug group includes an abutment sleeve; the abutment sleeve is installed on the outer wall of the output shaft and is located at the output shaft between two sealing plugs; and is close to the direction of the liquid storage chamber; the abutment sleeve includes a fixed sleeve and a sliding sleeve, and the fixed sleeve is fixedly installed on the output shaft; wherein the fixed sleeve is provided with a single-sided inlet; the sliding sleeve is slidably installed in the fixed sleeve and is located above the single-sided inlet, and the sliding sleeve can slide into the liquid storage chamber.

[0013] Furthermore, the filter group plug also includes a positioning sleeve, which is installed on the outer wall of the sliding sleeve and abuts against the liquid storage cavity. In actual use, the design purpose of the abutment group sleeve is to facilitate installation and liquid inlet so that under the push of the dialysate flow, the sliding sleeve can be close to the liquid storage cavity, and the positioning and alignment can be achieved through the positioning sleeve, so as to facilitate the filtering of the dialysate flow.

[0014] Furthermore, the filter group plug also includes a movable flexible sleeve and at least one hollow fiber membrane; the movable flexible sleeve is installed in the sliding sleeve, the hollow fiber membrane is installed in the movable flexible sleeve, and is evenly arranged in the movable flexible sleeve along the axial direction of the sliding sleeve; the hollow fiber membrane is used for hemodialysis purification. In actual use, the purpose of this design is to achieve effective filtration, wherein the movable flexible sleeve is pushed upward by the dialysate flow, so that the hollow fiber membranes arranged in multiple places form a multi-layer layout from the overlapping and extruded state, so that the multi-layer hollow fiber membranes can form multiple penetrations, so that a high-efficiency filtering effect can be achieved, and on the other hand, the above-mentioned hollow fiber membranes, multi-layer design, and can be expanded upward or multi-extruded and overlapped downward with the movable flexible sleeve, so as to achieve retractability, so that compared with the traditional fixed setting scheme, the hollow fiber membrane can perform more permeation and filtration of the dialysate; and the centrally arranged hollow fiber membranes are easy to replace and can be processed centrally. And it is arranged in the sliding sleeve, so that part of the dialysate liquid energy can be offset by the sliding of the sliding sleeve, thus avoiding the concentrated impact of the liquid on the hollow fiber membrane.

[0015] It can be seen from the above technical solution that the beneficial effects of the multi-chamber hemodialyzer provided by the present invention are:

[0016] (1) In actual use, the filter assembly is arranged in the multi-chamber housing adopted in the design, and the multi-chamber housing has multiple liquid storage chambers, so that the dialysate flows through the multiple liquid storage chambers in sequence, so that multiple filtering effects can be achieved, which greatly realizes the filtering effect;

[0017] (2) At the same time, after the hemodialysis is completed, the dialysate after passing through the hemodialysis body is returned to the multi-chamber housing, so that it can be reused, which is convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for the specific embodiments or the prior art description. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 A schematic diagram of the main structure of a multi-chamber hemodialyzer provided in an embodiment of the present invention;

[0020] Figure 2 for Figure 1 The enlarged schematic diagram of point A and the schematic diagram of the installation structure of the filter group plug in the filter tank are shown

[0021] Figure 3It is a working schematic diagram of the filter group plug entering the liquid storage chamber under the action of the dialysate flow;

[0022] Reference numerals:

[0023] Multi-chamber housing 1, liquid storage chamber 11, exchange liquid chamber 12, installation chamber 13, filter slot chamber 14, installation port 141, outflow port 142, filter assembly 2, filter cylinder 21, filter group plug 22, abutment group sleeve 221, fixed sleeve 2211, sliding sleeve 2212, positioning sleeve 2213, movable flexible sleeve 223, hollow fiber membrane 224, sealing septum 23, installation sleeve 24, replacement port 241, replacement slot plate 25, hemodialysis body 3, control assembly 4, opening and closing valve 41, liquid pushing assembly 5, pushing cylinder 51, sealing piston 52. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0025] The embodiment is basically as shown in the attached Figures 1 to 3 As shown:

[0026] like Figure 1 - Figure 3 As shown, a multi-chamber hemodialyzer provided in this embodiment can improve the filtering and purification efficiency.

[0027] The present invention provides a multi-chamber hemodialyzer, comprising: a multi-chamber shell 1, wherein the multi-chamber shell 1 has a liquid storage chamber 11 and an exchange liquid chamber 12; wherein the inlet of the exchange liquid chamber 12 is communicated with the liquid storage chamber 11; the liquid storage chamber 11 is provided at multiple locations and is evenly distributed; wherein the dialysis liquid passes through the liquid storage chamber 11 in sequence and enters the exchange liquid chamber 12; a filter component 2, wherein the filter component 2 is provided in the multi-chamber shell 1 and is used to filter the dialysis liquid; and a hemodialysis body 3, wherein one end of the hemodialysis body 3 is communicated with the outlet of the exchange liquid chamber 12; the hemodialysis body 3 is used for hemodialysis; and the other end of the hemodialysis body 3 is communicated with the multi-chamber shell 1. In actual application, the filter component 2 is set in the multi-chamber shell 1 adopted in the design, and the multi-chamber shell 1 has multiple liquid storage chambers 11, so that the dialysate flow passes through the multiple liquid storage chambers 11 in sequence. In this way, multiple filtering effects can be achieved, and the filtering effect is greatly achieved; at the same time, after the completion of hemodialysis, that is, the dialysate after passing through the hemodialysis body 3 is returned to the multi-chamber shell 1, so that it can be reused, which is convenient and practical.

[0028] In this embodiment, in order to facilitate the installation of accessories, the multi-chamber housing 1 is further provided with a mounting chamber 13 and a filtering slot chamber 14; the mounting chamber 13 is provided at multiple locations and is located above the liquid storage chamber 11 and communicates with the liquid storage chamber 11; the filtering slot chamber 14 is provided below the liquid storage chamber 11. In actual use, the purpose of this design is to enable the dialysis liquid to achieve a multi-stroke filtering path, thereby facilitating the filtering of the dialysis liquid by increasing its filtering stroke.

[0029] In order to facilitate control, in this embodiment, a control component 4 is also included, and the control component 4 is provided with an opening and closing valve 41; the opening and closing valve 41 is provided in multiple locations, and is installed one by one in the liquid storage cavity 11 and close to the direction of the filtering slot cavity 14. Among them, in actual applications, the design purpose of the opening and closing valve 41 is to ensure unidirectional flow and realize an S-shaped flow path, so that multiple purifications can be achieved.

[0030] At the same time, in this embodiment, in order to facilitate the formation of an adjustable osmotic pressure of the dialysis liquid and facilitate filtration, it also includes a liquid pushing component 5, and the liquid pushing component 5 is provided in multiple places and is installed one by one on the installation cavity 13; the liquid pushing group includes a pushing cylinder 51 and a sealing piston 52, and the sealing piston 52 is fixedly installed on the output shaft of the pushing cylinder 51, and the sealing piston 52 is slidably installed in the liquid storage cavity 11. In actual use, the purpose of this design is to facilitate the flow of dialysis liquid. In actual work, this design utilizes the principle of piston pump driving liquid flow. Through the coordinated use of any two adjacent liquid pushing components 5, not only can the flow of dialysis liquid be formed, but also different hydraulic pressures can be formed, thereby forming different osmotic pressures for efficient filtration. In this way, effective filtration can be performed according to actual conditions. When high-pressure filtration is required, in any two adjacent groups of liquid pushing components 5, when the sealing piston 52 away from the direction of the hemodialysis main body 3 moves downward rapidly, the sealing piston 52 of the next door rises slowly. Of course, at this time, the opening and closing valves 41 of the two liquid storage chambers 11 are both opened. In this way, the high osmotic pressure dialysis liquid formed can be quickly filtered. On the other hand, when low-pressure osmotic filtration is required, the opposite is true. When the sealing piston 52 away from the direction of the hemodialysis main body 3 moves downward slowly, the sealing piston 52 of the next door rises rapidly; in this way, low osmotic pressure dialysis liquid can be formed, and low osmotic pressure can be formed for osmotic filtration. Moreover, the pushing cylinder 51 is an electric cylinder, so that precise pushing can be achieved.

[0031] In the present embodiment, for the convenience of installation, the filter slotted cavity 14 is further provided with a mounting port 141 and an outflow port 142, wherein the mounting port 141 is located on the multi-chamber housing 1 and communicates with the outside; the outflow port 142 is arranged in a direction away from the mounting port 141, and the liquid storage cavity 11 communicates with the exchange liquid cavity 12 through the outflow port 142; the filter assembly 2 comprises a filter cylinder 21, a filter group plug 22 and two sealing spacer plugs 23; the filter cylinder 21 is detachably mounted on the filter slotted cavity 14 and is located at the mounting port 141; the two sealing spacer plugs 23 are detachably mounted on the output shaft of the filter cylinder 21 and are fixedly mounted in the axial direction and are abutted and sealed against the inner wall of the filter slotted cavity 14; wherein the straight-line distance between the two sealing spacer plugs 23 is equal to the sum of the widths of the adjacent liquid storage cavities 11, and the filter group plug 22 is mounted on the output shaft of the filter cylinder 21 and is located between the two sealing spacer plugs 23. In actual use, the purpose of this design is to facilitate filtration and penetration. The two sealing plugs 23 installed along the axis can form a closed flow channel between the two adjacent liquid storage chambers 11, so that the above-mentioned adjustment of the osmotic pressure is feasible. At the same time, the filter assembly 2 used for filtration is installed between the two sealing plugs 23; in this way, filtration can be achieved through the filter group plug 22. The sealing plug 23 is made of rubber material, so it is easy to form an abutment seal.

[0032] In order to facilitate the replacement of the filter group plug 22 and realize a replaceable filter element, in this embodiment, the filter assembly 2 further includes a mounting sleeve 24 and a replacement slot plate 25; one end of the mounting sleeve 24 is detachably mounted on the mounting port 141, and one end of the mounting sleeve 24 is fixedly connected to the filter cylinder 21; the mounting sleeve 24 is also provided with a replacement port 241, and the replacement port 241 is located on one side of the mounting sleeve 24; the replacement slot plate 25 is detachably mounted on the replacement port 241 and is sealedly connected to the replacement port 241. In actual use, the purpose of this design is to realize the replacement of the filter group plug 22; in actual work, when replacement is required, under the operation of the filter cylinder 21, that is, the output shaft of the filter cylinder 21 is moved to the direction of the replacement port 241, and then the replacement slot plate 25 on the replacement port 241 is removed, and then a new filter group plug 22 is replaced, and finally the replacement slot plate 25 is installed, so that quick use is achieved.

[0033] At the same time, in order to facilitate the fixing of the filter group plug 22 on the output shaft of the filter cylinder 21; in this embodiment, the filter group plug 22 includes an abutment sleeve 221; the abutment sleeve 221 is installed on the outer wall of the output shaft and is located at the output shaft between the two sealing plugs 23; and is close to the direction of the liquid storage chamber 11; the abutment sleeve 221 includes a fixed sleeve 2211 and a sliding sleeve 2212, and the fixed sleeve 2211 is fixedly installed on the output shaft; wherein the fixed sleeve 2211 is provided with a single-side inlet; the sliding sleeve 2212 is slidably installed in the fixed sleeve 2211 and is located above the single-side inlet, and the sliding sleeve 2212 can slide into the liquid storage chamber 11. And in order to further facilitate installation, in this embodiment, the filter group plug 22 also includes a positioning sleeve 2213, which is installed on the outer wall of the sliding sleeve 2212 and abuts against the liquid storage chamber 11. In actual use, the purpose of designing the abutment set 221 is to facilitate installation and liquid inlet so that under the push of the above-mentioned dialysate flow, the sliding sleeve 2212 can approach the liquid storage chamber 11, and the positioning sleeve 2213 can be used to achieve positioning and alignment, so as to facilitate the filtering of the dialysate flow.

[0034] Among them, in order to achieve filtration, in this embodiment, the filter group plug 22 also includes a movable flexible sleeve 223 and at least one hollow fiber membrane 224; the movable flexible sleeve 223 is installed in the sliding sleeve 2212, and the hollow fiber membrane 224 is installed in the movable flexible sleeve 223, and is evenly distributed in the movable flexible sleeve 223 along the axial direction of the sliding sleeve 2212; the hollow fiber membrane 224 is used for hemodialysis purification. In actual use, the purpose of this design is to achieve effective filtration, wherein the movable flexible sleeve 223 is pushed by the dialysate flow to expand upward, so that the hollow fiber membranes 224 arranged in multiple places form a multi-layer layout from the overlapping and extruding state, so that the hollow fiber membranes 224 arranged in multiple layers can form multiple penetrations, so that a high-efficiency filtration effect can be achieved, and on the other hand, the above-mentioned hollow fiber membranes 224 are multi-layered, and can be expanded upward or multi-extruded and overlapped downward with the movable flexible sleeve 223, so as to achieve shrinkage, so that compared with the traditional fixed setting scheme, the hollow fiber membranes 224 can perform more permeation and filtration of the dialysate; and the centrally arranged hollow fiber membranes 224 are easy to replace and can be processed centrally. And they are arranged in the sliding sleeve 2212, so that part of the dialysate energy can be offset by the sliding of the sliding sleeve 2212, so as to avoid the concentrated impact of the liquid on the hollow fiber membranes 224.

[0035] In actual operation, when the dialysate enters the liquid storage chamber 11 from the hemodialysis body 3, the on-off valve 41 at the liquid storage chamber 11 is opened, and the on-off valve 41 next to the liquid storage chamber 11 is kept closed, and then the filter cylinder 21 is started, so that the sealing septum 23 on the filter cylinder 21 is aligned with the multi-chamber housing 1 close to the bottom of the liquid storage chamber 11; and the filter group plug 22 is located directly below the liquid storage chamber 11 next to the liquid storage chamber 11; then the push cylinder 51 at the liquid storage chamber 11 is started until the positioning sleeve 2213 abuts against the cavity opening of the liquid storage chamber 11 next to the liquid storage chamber 11; then the on-off valve 41 at this location is opened, and then the dialysate is kept in sequence. The dialysis liquid passes through the hollow fiber membrane 224 in the movable flexible sleeve 223 until it completely flows into the adjacent liquid storage chamber 11, at which time the opening and closing valve 41 at the beginning is closed; this process is repeated until the dialysis liquid flows into the last liquid storage chamber 11, at which time the output shaft of the filter cylinder 21 enters the mounting sleeve 24, and then the opening and closing valve 41 of the last liquid storage chamber 11 is opened, and when the dialysis liquid flows into the filter slot chamber 14, all the opening and closing valves 41 are closed, and then the filter cylinder 21 is started again to push the dialysis liquid into the exchange liquid chamber 12, so that it can enter the hemodialysis body 3 for secondary work.

[0036] To sum up, this multi-chamber hemodialyzer is not only reasonably designed, but also convenient for replacing related components for filtration. The multi-layer movable hollow fiber membranes 224 for filtration are arranged therein to achieve multiple filtration effects; and the coordinated use of multiple evenly distributed liquid storage chambers 11 and the filter component 2 and the control component 4 not only realizes adjustable osmotic pressure, effectively realizes different pressure adjustments, greatly improves the osmotic filtration effect, but also can realize multi-stroke flow of dialysis liquid, which can pass through the liquid storage chambers 11 one by one, thereby greatly ensuring the filtration effect. Therefore, the device is suitable for industry promotion.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A multi-chamber hemodialyser, characterized in that: include: A multi-chamber housing, wherein the multi-chamber housing has a liquid storage chamber and a liquid exchange chamber; The inlet of the exchange liquid chamber is connected to the liquid storage chamber; the liquid storage chamber is provided at multiple locations and is evenly distributed; the dialysate passes through the liquid storage chamber in sequence and enters the exchange liquid chamber; a filter assembly disposed within the multi-chamber housing and configured to filter a dialysis fluid; and A hemodialysis body, one end of which is communicated with the outlet of the exchange fluid chamber; the hemodialysis body is used for hemodialysis; and the other end of the hemodialysis body is communicated with the multi-chamber housing.

2. A multi-chamber hemodialyzer according to claim 1, characterized in that: The multi-chamber housing is also provided with an installation cavity and a filtering slot cavity; the installation cavity is provided in multiple locations and is located above the liquid storage cavity and communicated with the liquid storage cavity; the filtering slot cavity is provided below the liquid storage cavity.

3. A multi-chamber hemodialyzer according to claim 2, characterized in that: It also includes a control component, which is provided with an opening and closing valve; the opening and closing valves are provided in multiple locations and are installed one by one in the liquid storage cavity and close to the direction of the filtering slot cavity.

4. A multi-chamber hemodialyzer according to claim 2, characterized in that: It also includes a liquid pushing component, which is provided with multiple locations and is installed one by one on the installation cavity; the liquid pushing group includes a pushing cylinder and a sealing piston, the sealing piston is fixedly installed on the output shaft of the pushing cylinder, and the sealing piston is slidably installed in the liquid storage cavity.

5. A multi-chamber hemodialyzer according to claim 4, characterized in that: The filter slotted cavity is also provided with a mounting port and an outflow port, wherein the mounting port is located on the multi-chamber housing and communicates with the outside; the outflow port is arranged in a direction away from the mounting port, and the liquid storage cavity communicates with the exchange liquid cavity through the outflow port; The filter assembly includes a filter cylinder, a filter group plug and two sealing spacer plugs; the filter cylinder is detachably mounted on the filter slot cavity and is located at the mounting port; the two sealing spacer plugs are detachably mounted on the output shaft of the filter cylinder and are fixedly mounted along the axial direction and are sealed against the inner wall of the filter slot cavity; the straight-line distance between the two sealing spacer plugs is equal to the sum of the widths of adjacent liquid storage cavities, and the filter group plug is mounted on the output shaft of the filter cylinder and is located between the two sealing spacer plugs.

6. A multi-chamber hemodialyzer according to claim 5, characterized in that: The filter assembly also includes a mounting sleeve and a replacement slot plate; one end of the mounting sleeve is detachably mounted on the mounting port, and one end of the mounting sleeve is fixedly connected to the filter cylinder; wherein the mounting sleeve is also provided with a replacement port, and the replacement port is located on one side of the mounting sleeve; wherein the replacement slot plate is detachably mounted on the replacement port, and is sealedly connected to the replacement port.

7. A multi-chamber hemodialyzer according to claim 5, characterized in that: The filter plug group includes an abutment sleeve; the abutment sleeve is installed on the outer wall of the output shaft and is located at the output shaft between two sealing plugs; and is close to the direction of the liquid storage chamber; The abutment assembly comprises a fixed sleeve and a sliding sleeve, wherein the fixed sleeve is fixedly mounted on the output shaft; wherein the fixed sleeve is provided with a single-side inlet; the sliding sleeve is slidably mounted in the fixed sleeve and is located above the single-side inlet, and the sliding sleeve can slide into the liquid storage cavity.

8. A multi-chamber hemodialyzer according to claim 7, characterized in that: The filter group plug also includes a positioning sleeve, which is installed on the outer wall of the sliding sleeve and abuts against the liquid storage cavity.

9. A multi-chamber hemodialyzer according to claim 7, characterized in that: The filter group plug also includes a movable flexible sleeve and at least one hollow fiber membrane; the movable flexible sleeve is installed in the sliding sleeve, and the hollow fiber membrane is installed in the movable flexible sleeve and is evenly distributed in the movable flexible sleeve along the axial direction of the sliding sleeve; the hollow fiber membrane is used for hemodialysis purification.

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