A hemodialysis fluid supply system
By designing a dual-suction pipeline and a backwashing device, the problems of pipeline blockage and low liquid delivery efficiency are solved, achieving stable liquid delivery and energy consumption optimization, and improving the operating efficiency of the hemodialysis fluid supply system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU KONCEN BIOSCI
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-29
AI Technical Summary
In existing automated centralized liquid supply systems, pipelines are prone to blockage, resulting in low liquid delivery efficiency and the liquid dispensing pump is prone to overload operation, leading to increased equipment energy consumption.
It adopts a dual-suction pipeline design. The liquid pump draws liquid through the second pipeline and returns the liquid to the inlet. Combined with the backwashing device, the filter components are backwashed. A dual-stage filter is set up to ensure liquid quality and flow monitoring. A stirrer is equipped to accelerate the dissolution of dry powder.
It effectively prevents debris from entering the dispensing pump and pipeline, maintains stable liquid delivery, reduces blockages, increases dispensing and delivery speed, reduces energy consumption, and reduces dialysate waste.
Smart Images
Figure CN224292292U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and in particular to a hemodialysis fluid supply system. Background Technology
[0002] Centralized fluid supply systems are commonly used devices for hemodialysis treatment in kidney disease patients. They prepare concentrated hemodialysis solution by thoroughly mixing hemodialysis dry powder with reverse osmosis water, storing it in sealed containers, and then delivering it to the dialysis equipment via centralized supply pipelines for treatment. A centralized fluid supply system typically includes a solution preparation device, a storage device, delivery pipelines, and a cleaning and disinfection device. Currently used centralized fluid supply systems are largely automated, reducing manual labor.
[0003] However, the automated centralized liquid supply system in the relevant technology also has the following problems, including:
[0004] 1. When disassembling and assembling dialysis dry powder, the presence of the cutter in the solution preparation device inevitably causes some plastic debris to fall into the solution preparation tank. When the debris comes into contact with the conductivity sensor, it affects the accuracy of the conductivity sensor. If it enters the pipeline, it will cause pipeline blockage, requiring manual retrieval.
[0005] 2. Automatic packaging generally involves small liquid dispensing volumes. When dry powder is poured into the dispensing tank, it accumulates at the bottom of the tank, blocking the outlet and affecting the dispensing pump's ability to draw water. This can lead to pump overload and increased energy consumption. Utility Model Content
[0006] This application proposes a hemodialysis fluid supply system to effectively solve the technical problems of easy pipe blockage and low fluid delivery efficiency in related technologies.
[0007] The first aspect of this application provides a hemodialysis fluid supply system, including: a fluid mixing device, a fluid mixing pump, a first filter component, a first pipeline, and a second pipeline;
[0008] The liquid mixing pump includes a first input terminal and a first output terminal;
[0009] The liquid preparation device includes an inlet and an outlet;
[0010] One end of the first pipeline is used as a water inlet, and the other end of the first pipeline is used to connect with the first input end. The first filter component is installed on the first pipeline.
[0011] The outlet is connected to the first input end through the first pipeline, so that the liquid preparation pump can draw liquid through the first pipeline and then output the dialysate.
[0012] The inlet is connected to the first output end, one end of the second pipeline is connected to the liquid dispensing device, and the other end of the second pipeline is connected to the first input end. The liquid dispensing pump is also configured to draw liquid through the second pipeline and deliver the liquid back to the inlet.
[0013] Furthermore, the hemodialysis fluid supply system also includes a third pipeline, one end of which is used to connect to a fluid storage device, and the other end of which is used to connect to the first output end. The third pipeline is equipped with a flow monitoring component to monitor the flow rate of the output dialysate.
[0014] Furthermore, a second filter element is provided on the third pipeline, and the second filter element is located upstream of the flow monitoring element.
[0015] Furthermore, the second filter component includes at least two filters arranged sequentially, with the filtration accuracy of each filter increasing sequentially along the liquid flow direction.
[0016] Furthermore, valve components are respectively provided at the first pipeline, the third pipeline, the inlet, and the outlet.
[0017] Furthermore, the hemodialysis fluid supply system also includes a backwashing device, which is disposed on the second pipeline. The second pipeline is connected between the first filter component of the first pipeline and the fluid mixing pump. The backwashing device is configured to be used to aspirate the liquid in the fluid mixing device and backwash the first filter component, or to aspirate the liquid in the fluid mixing device and then transport it to the fluid mixing pump.
[0018] Furthermore, the backwashing device includes a filter pipeline and a backwashing pump. The backwashing pump includes a second input end and a second output end. One end of the filter pipeline is connected to the liquid dispensing device, and the other end of the filter pipeline is connected to the second input end. The second output end is connected to the input end of the liquid dispensing pump through the second pipeline.
[0019] Furthermore, one end of the filter pipeline is connected to a position at a predetermined distance from the bottom of the liquid preparation device.
[0020] Furthermore, the first pipeline is also provided with a drain pipe, which is connected to the upstream of the first filter element.
[0021] Furthermore, the liquid preparation device is equipped with a stirrer, which is used to stir the liquid in the liquid preparation device.
[0022] As can be seen from the above technical solutions, the embodiments of this application have at least the following beneficial effects: the first filter component effectively prevents debris from entering the dispensing pump and subsequent conveying pipelines, reducing the occurrence of blockages; at the same time, the dispensing pump adopts a dual suction pipeline, which can disconnect the first pipeline and connect the second pipeline to draw liquid when adding powder, and then reconnect the first pipeline after the dry powder dissolves, which can maintain a stable liquid flow rate of the dispensing pump, avoid dry powder being sucked into the dispensing pump during the powder adding process, causing the dispensing pump to overload, and improve the dispensing speed. During the conveying process, the dual suction means that even if the filter in the first pipeline is blocked, the liquid flow rate of the dispensing pump can be maintained to maintain a stable flow rate, thereby improving the conveying speed.
[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of a hemodialysis fluid supply system provided in one embodiment of this application;
[0026] Figure 2 This is a schematic diagram of the structure of a first filter component provided in one embodiment of this application;
[0027] Figure 3 This is a schematic diagram of the structure of a filter pipeline provided in one embodiment of this application.
[0028] Figure label:
[0029] 100. First pipeline; 110. Inlet;
[0030] 200. Liquid preparation device; 201. Liquid inlet; 202. Liquid outlet;
[0031] 300, Liquid mixing pump; 301, First input terminal; 302, First output terminal;
[0032] 400, First filter element; 410, First tube body; 420, Second tube body; 430, Union joint; 440, Filler element; 450, Filter baffle; 460, Reducing joint;
[0033] 500, Second pipeline;
[0034] 600. Backwashing device; 610. Filter pipeline; 620. Backwashing pump; 630. Drain pipeline;
[0035] 700. Third pipeline; 710. Flow monitoring component; 720. Second filter component;
[0036] 800. Liquid storage device. Detailed Implementation
[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0038] See Figures 1 to 3 As shown, an embodiment of the first aspect of this application discloses a hemodialysis fluid supply system, including a fluid preparation device 200, a fluid preparation pump 300, a first filter component 400, a first pipeline 100, and a second pipeline 500.
[0039] The solution mixing pump 300 includes a first input terminal 301 and a first output terminal 302; the solution mixing device 200 includes an inlet 201 and an outlet 202; one end of the first pipeline 100 is used as an inlet 110, and the other end of the first pipeline 100 is used to communicate with the first input terminal 301; a first filter element 400 is disposed on the first pipeline 100; the outlet 202 is connected to the first input terminal 301 through the first pipeline 100, so that the solution mixing pump 300 can draw liquid through the first pipeline 100 and then output the dialysate; the inlet 201 is connected to the first output terminal 302; one end of the second pipeline 500 is connected to the solution mixing device 200, and the other end of the second pipeline 500 is connected to the first input terminal 301; the solution mixing pump 300 is also configured to draw liquid through the second pipeline 500 and deliver the liquid to the inlet 201 for reflux.
[0040] In the embodiments of this application, the first filter component 400 effectively prevents debris from entering the liquid mixing pump 300 and subsequent delivery pipelines, reducing the occurrence of blockages. At the same time, the liquid mixing pump 300 adopts a dual suction pipeline, which can effectively prevent dry powder from being sucked into the liquid mixing pump 300 during the powder feeding process by using the second pipeline 500, thus preventing the liquid mixing pump 300 from overloading. After absorbing liquid, the liquid mixing pump 300 will deliver the liquid to the liquid inlet 201 for return, so that the suction flow rate can be kept constant, thereby improving the liquid mixing and delivery speed and maintaining stable working efficiency.
[0041] Specifically, during powder feeding, the first pipeline 100 can be disconnected and the second pipeline 500 can be connected to draw liquid. After the dry powder dissolves, the first pipeline 100 can be reconnected. This can maintain a stable liquid flow rate of the dispensing pump 300, prevent dry powder from being sucked into the dispensing pump 300 during the powder feeding process, avoid overloading the dispensing pump 300, and increase the dispensing speed. During the transfer process, the dual-path water intake can maintain a stable liquid flow rate of the dispensing pump even if the filter of the first pipeline 100 is clogged, thereby increasing the transfer speed.
[0042] It is understood that in some embodiments, after adding powder and water to the liquid preparation device 200 and completing the stirring, the liquid preparation device 200 can output the dialysate required by this hemodialysis supply system. In the hemodialysis treatment equipment, the liquid output by the liquid preparation device 200 is usually received by the liquid storage device 800 and then transported to the hemodialysis room by the liquid storage device 800.
[0043] In the embodiments of this application, the hemodialysis fluid supply system includes at least a fluid preparation process and a delivery process. During the fluid preparation process, liquid is input through the inlet 110 of the first pipeline 100 and delivered to the fluid preparation device 200 by the fluid preparation pump 300, where powder is then added. The fluid preparation pump 300 then draws water from the fluid preparation device 200 through the second pipeline 500, achieving a water circulation effect to fully dissolve the dry powder and complete the fluid preparation process. During the fluid preparation process, the liquid drawn by the fluid preparation pump 300 from the second pipeline 500 is delivered to the inlet 201 of the fluid preparation device 200. This method increases the fluid preparation speed while ensuring the fluid intake of the fluid preparation pump 300, guaranteeing that all subsequent liquid is delivered to the storage tank and reducing waste. During the transfer process, dialysate is output through the outlet 202 of the solution preparation device 200 and transported to the solution preparation pump 300 via the first pipeline 100 for dispensing. At this time, the first output end 302 of the solution preparation pump 300 can be connected to an external storage tank or a subsequent dialysis system. The solution preparation pump 300 of this application adopts a dual suction pipeline. Through programmable switching, it can effectively prevent dry powder from being sucked into the solution preparation pump 300 during the powder feeding process, thus avoiding overload operation of the solution preparation pump 300. Furthermore, the suction flow rate of the solution preparation pump 300 can be kept constant, thereby achieving the effect of improving the solution preparation and transfer speed.
[0044] The following will combine Figures 1 to 3 The hemodialysis fluid supply system disclosed in the embodiments of this application will be explained and described in detail.
[0045] Understandably, there are still technical problems in related technologies. Traditional liquid delivery testing relies on timed delivery to determine the end point of infusion. Slower delivery often results in the incomplete delivery of the prepared liquid, leading to waste of dialysis fluid.
[0046] Based on this, in some embodiments of this application, such as Figure 1The hemodialysis fluid supply system also includes a third pipeline 700, one end of which is used to connect to the fluid storage device 800, and the other end of which is used to connect to the first output end 302. The third pipeline 700 is equipped with a flow monitoring component 710 for monitoring the flow rate of the output dialysis fluid.
[0047] Understandably, monitoring the flow rate of the dialysate through the flow monitoring component 710 can ensure the quantitative delivery of the liquid, reduce waste, and also ensure that the precision filter element is working within its effective lifespan, thereby reducing the energy consumption of the dispensing pump 300.
[0048] In some embodiments, the flow monitoring component 710 includes, but is not limited to, an ultrasonic flow meter, an electromagnetic flow meter, a flow sensor, etc.
[0049] Understandably, the relevant technologies also have the problem that the precision filter cartridges installed on the delivery pipeline will gradually become clogged during use, and the liquid transfer from the preparation tank to the storage tank will gradually slow down. Traditional liquid delivery tests rely on timed delivery to determine the end point of the infusion. The slowed delivery often results in the incomplete delivery of the prepared liquid, leading to waste of dialysate.
[0050] In some embodiments of this application, a second filter element 720 is provided on the third pipeline 700, located upstream of the flow monitoring element 710. It is understood that while the first filter element 400 acts as a pre-filter to remove most of the plastic debris, the second filter element 720, based on further filtration, performs high-precision filtration of undissolved dry powder, thereby ensuring the quality of the subsequent dialysate and meeting usage requirements. Furthermore, the second filter element 720 also improves the monitoring accuracy of the flow monitoring element 710, further reducing dialysate waste.
[0051] In one specific embodiment, the second filter element 720 includes at least two filters arranged sequentially, with the filtration accuracy of each filter increasing sequentially along the liquid flow direction. The two filters work together to meet the requirements of a post-precision filter. In some embodiments, the post-precision filter comprises a 1µm filter, a 0.22µm filter, and connecting structural components.
[0052] To ensure the continuous filtration capability of the first filter element 400, reduce maintenance costs, and improve liquid delivery efficiency, in some embodiments of this application, the hemodialysis fluid supply system further includes a backwashing device 600. The backwashing device 600 is disposed on a second pipeline 500, which is connected between the first filter element 400 and the dispensing pump 300 in the first pipeline 100. The backwashing device 600 is configured to either aspirate liquid from the dispensing device 200 and backwash the first filter element 400, or aspirate liquid from the dispensing device 200 and deliver it to the dispensing pump 300.
[0053] It is understandable that the backwashing device 600 can effectively backwash the first filter element 400 to prevent debris from clogging it. Considering that the liquid dispensing pump 300 is connected to the inside of the liquid dispensing device 200 through the second pipeline 500, the backwashing device 600 is set in the second pipeline 500. Backwashing can be achieved through the liquid inside the liquid dispensing device 200. When the liquid dispensing pump 300 needs to draw liquid, the backwashing device 600 can play a synergistic role to improve the liquid delivery efficiency, thereby optimizing the overall system layout and facilitating control and program switching.
[0054] It should be understood that in the embodiment where the backwashing device 600 is installed in the second pipeline 500, the backwashing device 600 has two functions: backwashing the first filter element 400 and drawing liquid from the liquid preparation device 200 and conveying it to the liquid preparation pump 300. In this embodiment, when dry powder is added to the liquid preparation device 200, the backwashing device 600 and the liquid preparation pump 300 are started simultaneously, so that the liquid in the liquid preparation device 200 flows back to the inlet 201 of the liquid preparation device 200 through the conveying of the backwashing device 600 and the liquid preparation pump 300, so that water circulation occurs in the liquid preparation device to accelerate the dissolution of the dry powder. When the first filter element 400 needs to be backwashed, the backwashing device 600 is started and the liquid preparation pump 300 is stopped. At this time, the liquid in the liquid preparation device 200 is conveyed by the backwashing device 600 to backwash the first filter element 400.
[0055] Specifically, one end of the first pipeline 100 of this application is connected to a water source and serves as the inlet 110 of the entire hemodialysis fluid supply system. The backwashing device 600 is used to backwash the first filter component 400 on the one hand, and on the other hand, it is connected to the first input end 301 of the solution mixing pump 300 through the backwashing pipeline. This allows the solution mixing pump 300 to supply fluid through a double suction pipeline composed of the first pipeline 100 and the second pipeline 500, thereby reducing the impact of the powder addition process of the solution mixing device 200 on the solution mixing pump 300 and keeping the suction flow of the solution mixing pump 300 constant, thereby improving the solution mixing and delivery speed.
[0056] In some embodiments, the backwashing device 600 includes a filter line 610 and a backwashing pump 620. The backwashing pump 620 includes a second input terminal and a second output terminal. One end of the filter line 610 is connected to the liquid dispensing device 200, and the other end of the filter line 610 is connected to the second input terminal. The second output terminal is connected to the input terminal of the liquid dispensing pump 300 via a second line 500. It is understood that, while the backwashing pump 620 is used to backwash the pre-filter, reducing manual maintenance costs, the filter line 610 is designed to reduce the amount of dry powder entering the liquid dispensing pump 300.
[0057] In some embodiments, one end of the filter line 610 is connected to a position at a predetermined distance from the bottom of the liquid mixing device 200. By setting the position of the backwashing device 600 connected to the liquid mixing device 200 at a certain distance from the bottom of the liquid mixing device 200, the liquid mixing pump 300 can be prevented from sucking in dry powder.
[0058] In one specific embodiment, refer to Figure 3 The filter line 610 includes a filter pipe 610, which has filter holes in its circumferential direction. The filter pipe 610 has small holes distributed in the circumferential direction, which can prevent debris from entering the pipe, ensure the liquid pump's suction capacity of 300, improve the liquid dispensing speed, and reduce energy consumption.
[0059] In some embodiments of this application, the first pipeline 100 is further provided with a drain pipeline 630, which is connected upstream of the first filter element 400. It is understood that the drain pipeline 630 is used in conjunction with the backwashing device 600 so that after the backwashing device 600 backwashes the first filter element 400, the impurities can be discharged through the drain pipeline 630.
[0060] In some embodiments of this application, the liquid preparation device 200 is equipped with a stirrer for agitating the liquid within the device. It is understood that the liquid preparation pump 300 draws liquid through the second pipeline 500 to flow the liquid within the device 200 and accelerate the dissolution of the dry powder. The internal stirrer further agitates the liquid, achieving the effect of accelerating the dissolution of the dry powder. Specifically, the stirrer is electrically driven and can be a self-priming stirrer. In other embodiments, a propeller-type stirrer, a magnetically coupled stirrer, or similar equipment may be used depending on the actual application requirements.
[0061] Furthermore, valve components are respectively installed at the first pipeline 100, the third pipeline 700, the drain pipeline 630, the inlet 201, and the outlet 202. It is understandable that the installation of valve components makes the control of this hemodialysis fluid supply system more convenient, and the logical actions during the operation of the fluid preparation process, the transfer process, the self-cleaning of the fluid preparation tank, and the cleaning process of the pre-filter are more reasonable.
[0062] In one specific embodiment, refer to Figure 2 The first filter component 400 includes a first tube 410, a second tube 420, and a union joint 430. One end of the first tube 410 is provided with a filler core 440, and one end of the second tube 420 is provided with a filter baffle 450. The filler core 440 of the first tube 410 is connected to the filter baffle 450 of the second tube 420 via the union joint 430. The other ends of the first tube 410 and the second tube 420 are respectively provided with reducing joints 460. It is understood that the reducing joint 460 allows the first filter component 400 to be easily installed in the system's piping. The filler core 440 and the union joint 430, together with the reducing joint 440 and the union joint 430, facilitate the installation of the filter baffle 450, which has several filter holes for coarse filtration.
[0063] The hemodialysis fluid supply system of this application is described in detail below with reference to a specific embodiment. It should be noted that the following embodiment is merely an exemplary description and should not be construed as limiting the embodiments of this application.
[0064] See Figures 1 to 3 As shown, the hemodialysis fluid supply system of this embodiment includes a fluid preparation device 200, a fluid storage device 800, and pipelines for transporting fluids between them. A two-stage filtration system is provided, comprising a first filter element 400 of a pre-filter with a variable diameter, and a second filter element 720 of a post-filter with a precision. The pre-filter with a variable diameter, a coarse filter, consists of a reducing connector 460, a filler element 440, a union, a filter baffle 450, and fittings. The baffle has an aperture ≥1mm, perfectly fitting the large-diameter union. The post-filter with a precision is composed of a 1µm filter, a 0.22µm filter, a flow meter, and fittings. Furthermore, a backwashing device 600 is provided at the outlet end of the coarse filter with a variable diameter, including a filter pipeline 610, a backwash pump 620, and fittings. The fluid preparation pump 300 has a dual suction pipeline formed by the aforementioned coarse filter pipeline and backwash pipeline. Specifically, the backwash pump 620 draws liquid from the liquid preparation device 200 through the filter pipeline 610, and the liquid preparation pump 300 receives the liquid delivered by the backwash pump 620 through the pipeline and then delivers it to the liquid inlet 201 for return.
[0065] Solution preparation process: When adding powder, close the valve at the outlet 202 of the solution preparation device 200, and open the valves at the inlet 201 of the solution preparation pump 300 and the solution preparation device 200. The backwashing device 600 draws liquid from the solution preparation device 200, and the solution preparation pump 300 draws liquid from the backwashing device 600. The agitator inside the solution preparation device 200 stirs the liquid. After the dry powder has dissolved for a period of time, open the valve at the outlet 202 of the solution preparation device 200 again. Because the backwashing device 600 is installed at a certain distance from the bottom of the solution preparation tank, it prevents the solution preparation pump 300 from drawing in dry powder. Furthermore, the filter pipe 610 has circumferentially distributed small holes, which can prevent debris from entering the pipe, ensuring the liquid intake of the solution preparation pump 300, increasing the solution preparation speed, and reducing energy consumption.
[0066] Transfer process: During transfer, open the valve components at the outlet 202 of the liquid mixing device 200, the valve components of the third pipeline 700, and the liquid mixing pump 300. The flow meter at the back end of the precision filter can monitor the flow rate of the filtered liquid. By observing the change in the flow rate, it can be determined whether the liquid in the liquid mixing tank has been transferred, thus avoiding liquid waste.
[0067] Furthermore, by detecting the filtration flow rate, the degree of filter clogging can be determined, prompting equipment and pipeline personnel to replace it, thus avoiding the use of the filter under excessive clogging conditions, which would result in high energy consumption.
[0068] Self-cleaning of the mixing tank: When emptying, open the valve component on the drain pipe 630, and some debris will flow out of the equipment with the water flow from the drain pipe at the bottom of the mixing tank.
[0069] Cleaning the pre-filter: During cleaning, close the valve components at the outlet 202 of the liquid mixing device 200, the inlet 201 of the liquid mixing device 200, and the valve components at the third pipeline 700. Open the valve components on the drain pipeline 630 and the backwash pump 620 to perform backwashing, flushing the plastic debris in the filter baffle out of the drain pipeline in the opposite direction.
[0070] The hemodialysis fluid supply system of this embodiment monitors the flow rate of the filtrate, ensuring that all liquid in the preparation tank is transferred to the storage tank, reducing waste. It also ensures that the precision filter cartridge operates within its effective lifespan, reducing the energy consumption of the preparation pump 300. Simultaneously, the preparation pump 300 employs a dual-suction pipeline, which, through programmable switching, effectively prevents dry powder from being drawn into the preparation pump 300 during powder addition, thus avoiding overload operation. Furthermore, the suction flow rate of the preparation pump 300 remains constant, thereby improving the preparation and delivery speed. In addition, the use of a pre-filter effectively prevents debris from entering the filter and preparation pump 300, extending the service life of the preparation pump 300, the filter, and the precision filter cartridge. Finally, the hemodialysis fluid supply system of this embodiment can automatically clean the preparation tank and uses a backwashing device 600 to backwash the pre-filter, reducing manual maintenance costs.
[0071] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 this application.
[0072] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0073] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0074] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
Claims
1. A hemodialysis fluid supply system, characterized in that, include: Liquid preparation device, liquid preparation pump, first filter component, first pipeline and second pipeline; The liquid mixing pump includes a first input terminal and a first output terminal; The liquid preparation device includes an inlet and an outlet; One end of the first pipeline is used as a water inlet, and the other end of the first pipeline is used to connect with the first input end. The first filter component is installed on the first pipeline. The outlet is connected to the first input end through the first pipeline, so that the liquid preparation pump can draw liquid through the first pipeline and then output the dialysate. The inlet is connected to the first output end, one end of the second pipeline is connected to the liquid dispensing device, and the other end of the second pipeline is connected to the first input end. The liquid dispensing pump is also configured to draw liquid through the second pipeline and deliver the liquid back to the inlet.
2. The hemodialysis fluid supply system according to claim 1, characterized in that: The hemodialysis fluid supply system also includes a third pipeline, one end of which is used to connect to a fluid storage device, and the other end of which is used to connect to the first output end. The third pipeline is equipped with a flow monitoring component to monitor the flow rate of the output dialysate.
3. The hemodialysis fluid supply system according to claim 2, characterized in that: The third pipeline is equipped with a second filter component, which is located upstream of the flow monitoring component.
4. The hemodialysis fluid supply system according to claim 3, characterized in that: The second filtration component includes at least two filters arranged sequentially, with the filtration accuracy of each filter increasing sequentially along the liquid flow direction.
5. The hemodialysis fluid supply system according to claim 2, characterized in that: Valve components are respectively provided at the first pipeline, the third pipeline, the inlet and the outlet.
6. The hemodialysis fluid supply system according to claim 1, characterized in that: The hemodialysis fluid supply system further includes a backwashing device, which is installed on the second pipeline. The second pipeline is connected between the first filter component of the first pipeline and the fluid mixing pump. The backwashing device is configured to either draw liquid from the fluid mixing device and backwash the first filter component, or to draw liquid from the fluid mixing device and then transport it to the fluid mixing pump.
7. The hemodialysis fluid supply system according to claim 6, characterized in that: The backwashing device includes a filter pipeline and a backwashing pump. The backwashing pump includes a second input end and a second output end. One end of the filter pipeline is connected to the liquid mixing device, and the other end of the filter pipeline is connected to the second input end. The second output end is connected to the input end of the liquid mixing pump through the second pipeline.
8. The hemodialysis fluid supply system according to claim 7, characterized in that: One end of the filter pipeline is connected to a position at a predetermined distance from the bottom of the liquid preparation device.
9. The hemodialysis fluid supply system according to claim 6, characterized in that: The first pipeline is also provided with a drain pipe, which is connected to the upstream of the first filter element.
10. The hemodialysis fluid supply system according to claim 1, characterized in that: The liquid preparation device is equipped with a stirrer, which is used to stir the liquid in the liquid preparation device.