Liquid supply apparatus for hemodialysis

Abstract

The utility model discloses a kind of liquid supply equipment for hemodialysis, including the liquid storage tank being provided with liquid outlet and liquid return port, the liquid supply circulation pipeline being connected liquid outlet and liquid return port, the liquid outlet valve located downstream of liquid outlet and the liquid return valve located upstream of liquid return port;Heater and circulating pump are set on the liquid supply circulation pipeline, bypass pipeline, its first end is connected to the first position of liquid supply circulation pipeline, second end is connected to the second position of liquid supply circulation pipeline, first position is located downstream of liquid outlet valve, second position is located upstream of liquid return valve;Sterilization circulation valve is arranged in bypass pipeline, and the liquid supply circulation pipeline between first position and second position can be cooperated to form sterilization circulation pipeline in bypass pipeline.The application can conveniently carry out individual sterilization to liquid supply pipeline, and sterilization is thorough, sterilization cycle is short, in addition, hot tank can be cancelled, and the occupied space is reduced, energy saving and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a fluid supply device for hemodialysis. Background Technology

[0002] In hemodialysis treatment, the sterility of the dialysate directly affects patient safety. If the tubing or storage components of the dialysate supply equipment are contaminated with bacteria or endotoxins, it may pose a safety hazard to the patient's health.

[0003] Most existing hemodialysis fluid supply equipment uses hot water in heated tanks for sterilization, which has the following core problems:

[0004] First, during hot water sterilization, the water temperature is lost as it flows along the pipes. The temperature loss is significant at the end of the pipe, especially when the pipe is long. The end of the pipe usually cannot reach the sterilization temperature, resulting in incomplete heat sterilization.

[0005] Secondly, the existing hot water sterilization method sterilizes the storage tank and the supply pipeline simultaneously. If the supply pipeline needs to be sterilized, the dialysate in the storage tank must be emptied before heat sterilization can be carried out. This will lead to problems such as waste of dialysate and long sterilization time. In addition, the normal supply of dialysate cannot be maintained for a long time during sterilization.

[0006] In addition, it requires a very large hot water tank (e.g., 300L) to provide hot water for sterilization, which takes up a lot of space and is not energy efficient when in use.

[0007] Therefore, it is necessary to propose a fluid supply device for hemodialysis to solve at least one of the above problems.

[0008] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Utility Model Content

[0009] In view of the shortcomings of the existing technology, the present invention provides a fluid supply device for hemodialysis, which can conveniently and thoroughly sterilize the fluid supply pipeline, with a short sterilization cycle. In addition, it can eliminate the need for a heating tank, reduce the space occupied, and save energy and protect the environment.

[0010] The specific technical solution of this utility model embodiment is as follows:

[0011] A fluid supply device for hemodialysis, comprising: a storage tank having an outlet and a return port; a fluid supply circulation pipeline connected at one end to the outlet and at the other end to the return port; an outlet valve disposed on the fluid supply circulation pipeline downstream of the outlet; a heater disposed on the fluid supply circulation pipeline for heating fluid flowing through it; a circulation pump disposed on the fluid supply circulation pipeline for providing driving force to the fluid in the fluid supply circulation pipeline; a return valve disposed on the fluid supply circulation pipeline upstream of the return port; and a bypass pipeline. The bypass pipeline has a first end and a second end. The first end is connected to a first position of the liquid supply circulation pipeline, and the second end is connected to a second position of the liquid supply circulation pipeline. Along the flow direction of the fluid in the liquid supply circulation pipeline, the first position is located downstream of the outlet valve, and the second position is located upstream of the return valve. A sterilization circulation valve is located in the bypass pipeline. When sterilizing the liquid supply circulation pipeline, the outlet valve and the return valve are in a closed state, the sterilization circulation valve is in a closed state, the circulation pump is started, the heater is started, and the bypass pipeline can cooperate with the liquid supply circulation pipeline between the first position and the second position to form a sterilization circulation pipeline.

[0012] In a preferred embodiment, the bypass line is provided with a temperature sensor near the second end, and the hemodialysis fluid supply device further includes a controller electrically connected to the temperature sensor and the heater.

[0013] In a preferred embodiment, the liquid supply device further includes a first drain pipe, one end of which is connected to the liquid supply circulation pipe located between the second position and the return valve, and a first vent valve is provided on the first drain pipe.

[0014] In a preferred embodiment, the heater is an electromagnetic non-contact heater.

[0015] In a preferred embodiment, the heater integrates a temperature detection unit.

[0016] In a preferred embodiment, the outlet and the return port are located at the bottom of the storage tank, with the outlet positioned lower than the return port.

[0017] In a preferred embodiment, the storage tank is a closed tank body, and the tank body is also provided with a liquid inlet and a cleaning port. The liquid inlet is used to connect to a liquid inlet pipeline, and a liquid inlet valve is provided in the liquid inlet pipeline. The cleaning port is equipped with a cleaning pipeline, and a cleaning valve is provided in the cleaning pipeline.

[0018] In a preferred embodiment, a liquid supply pump is also provided on the liquid supply circulation pipeline. The liquid supply pump is located between the liquid outlet valve and the heater. One end of the cleaning pipeline is connected to the liquid supply circulation pipeline. The position where the cleaning pipeline is connected to the liquid supply circulation pipeline is a third position, which is located between the heater and the circulation pump.

[0019] In a preferred embodiment, the liquid supply device further includes a second drain pipe, one end of which is connected to the liquid supply circulation pipe located between the heater and the circulation pump, and a second vent valve is provided on the second drain pipe.

[0020] In a preferred embodiment, the hemodialysis fluid supply device has a first trigger for sterilizing the fluid supply circulation pipeline and a second trigger for sterilizing the storage tank; when the second trigger is triggered, the cleaning valve is in the open state, the fluid supply pump is in the start state, the heater is in the start state, the outlet valve is in the open state, and the return valve is in the closed state.

[0021] In a preferred embodiment, the storage tank is equipped with a sterilization device.

[0022] In a preferred embodiment, the end of the cleaning pipeline extends into the liquid storage tank, and a spray ball is provided at the end of the cleaning pipeline.

[0023] In a preferred embodiment, a pressure sensor is provided inside the liquid storage tank.

[0024] In a preferred embodiment, a filter mechanism is further provided upstream of the inlet valve on the inlet pipeline.

[0025] In a preferred embodiment, a mixing device is further provided upstream of the liquid inlet pipeline.

[0026] The technical solution of this utility model has the following significant beneficial effects:

[0027] The hemodialysis fluid supply device provided in this application embodiment connects a bypass pipeline to the fluid supply circulation pipeline from a first position downstream of the outlet valve to a second position upstream of the return valve. A sterilization circulation valve is installed in this bypass pipeline. When sterilization of the fluid supply circulation pipeline is required independently, this bypass pipeline can cooperate with the fluid supply circulation pipeline between the first and second positions to form a sterilization circulation pipeline. This sterilization circulation pipeline is a closed system. During sterilization, the circulating dialysate in the fluid supply circulation pipeline is heated by starting a circulation pump and a heater, achieving efficient sterilization of the fluid supply circulation pipeline. By setting up this bypass pipeline, it is equivalent to short-circuiting the storage tank. When sterilizing the fluid supply circulation pipeline independently, since the overall capacity of the pipeline to hold dialysate is limited, starting the circulation pump and heater can efficiently circulate and heat the limited volume of dialysate, thereby effectively shortening the sterilization time. Due to the short sterilization cycle, normal fluid supply is not affected. Furthermore, by using an on-demand heater for instant heating, the hot tank can be eliminated, reducing space requirements and saving energy and protecting the environment.

[0028] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, embodiments of the present invention include many changes, modifications, and equivalents. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0029] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0030] Figure 1 This is a schematic diagram of a sterilization state of the hemodialysis fluid supply device provided in the embodiments of this application;

[0031] Figure 2 This is a schematic diagram illustrating another sterilization state of the hemodialysis fluid supply device provided in the embodiments of this application.

[0032] Reference numerals in the figures of this application:

[0033] 1. Liquid storage tank;

[0034] 11. Liquid outlet;

[0035] 12. Return port;

[0036] 13. Liquid inlet;

[0037] 130. Inlet valve;

[0038] 14. Cleaning port;

[0039] 15. Sterilization device;

[0040] 16. Spray ball;

[0041] 17. Pressure sensor;

[0042] 2. Liquid supply circulation pipeline;

[0043] 21. Discharge valve;

[0044] 22. Heater;

[0045] 23. Circulating pump;

[0046] 24. Return valve;

[0047] 25. Liquid supply pump;

[0048] 261. First position;

[0049] 262. Second position;

[0050] 263. Third position;

[0051] 27. Flow meter;

[0052] 3. Bypass pipeline;

[0053] 30. Sterilization circulation valve;

[0054] 31. Temperature sensor;

[0055] 4. First drain line;

[0056] 41. First vent valve;

[0057] 5. Clean the pipelines;

[0058] 51. Cleaning valve;

[0059] 6. Second drain line;

[0060] 61. Second vent valve. Detailed Implementation

[0061] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0062] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0064] This invention provides a fluid supply device for hemodialysis, which can conveniently and thoroughly sterilize the fluid supply pipeline, with a short sterilization cycle, and does not affect the normal supply of dialysate during sterilization. In addition, it can eliminate the need for a heating tank, reduce the space occupied, and save energy and protect the environment.

[0065] Please refer to the following for comprehensive information. Figures 1 to 2This application specification provides a fluid supply device for hemodialysis, which may include: a storage tank 1, the storage tank 1 being provided with an outlet 11 and a return port 12; a fluid supply circulation pipeline 2, one end of the fluid supply circulation pipeline 2 being connected to the outlet 11 and the other end being connected to the return port 12; an outlet valve 21, the outlet valve 21 being disposed on the fluid supply circulation pipeline 2 and located downstream of the outlet 11; a heater 22, the heater 22 being disposed on the fluid supply circulation pipeline 2 and used to heat the fluid flowing through the heater 22; a circulation pump 23, the circulation pump 23 being disposed on the fluid supply circulation pipeline 2 and used to provide driving force for the fluid in the fluid supply circulation pipeline 2; a return valve 24, the return valve 24 being disposed on the fluid supply circulation pipeline 2 and located upstream of the return port 12; and a bypass. Pipeline 3, the bypass pipeline 3 has a first end and a second end, the first end is connected to a first position 261 of the liquid supply circulation pipeline 2, and the second end is connected to a second position 262 of the liquid supply circulation pipeline 2. In the direction of fluid flow in the liquid supply circulation pipeline 2, the first position 261 is located downstream of the outlet valve 21, and the second position 262 is located upstream of the return valve 24. Sterilization circulation valve 30 is located in the bypass pipeline 3. When sterilizing the liquid supply circulation pipeline 2, the outlet valve 21 and the return valve 24 are in the closed state, the sterilization circulation valve 30 is in the open state, the circulation pump 23 is started, the heater 22 is started, and the bypass pipeline 3 can cooperate with the liquid supply circulation pipeline 2 between the first position 261 and the second position 262 to form a sterilization circulation pipeline.

[0066] The hemodialysis fluid supply device provided in this application embodiment connects a bypass pipe 3 to the fluid supply circulation pipeline 2, which runs from a first position 261 downstream of the outlet valve 21 to a second position 262 upstream of the return valve 24. A sterilization circulation valve 30 is installed in this bypass pipe 3. When sterilization of the fluid supply circulation pipeline 2 is required separately, the bypass pipe 3 can cooperate with the fluid supply circulation pipeline 2 between the first position 261 and the second position 262 to form a sterilization circulation pipeline. This sterilization circulation pipeline is a closed system. During sterilization, the circulating dialysate in the fluid supply circulation pipeline 2 is heated by activating the circulation pump 23 and the heater 22, achieving efficient sterilization of the fluid supply circulation pipeline 2. By setting up the bypass pipeline 3, the storage tank 1 is effectively short-circuited. When the supply circulation pipeline 2 is sterilized independently, the limited capacity of the pipeline to hold dialysate allows for efficient circulation and heating of the limited volume of dialysate after starting the circulation pump 23 and heater 22, thus effectively shortening the sterilization time. Because the sterilization cycle is short, it does not affect normal dialysate supply. Furthermore, the use of heater 22 for instant heating eliminates the need for a heating tank, reducing space requirements and promoting energy conservation and environmental protection.

[0067] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0068] In this embodiment, the hemodialysis fluid supply device mainly includes: a storage tank 1, a fluid supply circulation pipeline 2 and a bypass pipeline 3, as well as various functional components installed in the above pipelines.

[0069] The storage tank 1 may include a hollow tank body for containing dialysate. The tank body may be equipped with an outlet 11 and a return port 12. The outlet 11 allows the dialysate in the storage tank 1 to flow into the supply circulation line 2, and the return port 12 allows the dialysate in the supply circulation line 2 to flow back into the storage tank 1. Along the flow direction of the dialysate, a discharge valve 21 may be installed on the supply circulation line 2 downstream of the outlet 11, positioned close to the outlet 11. A return valve 24 may be installed on the supply circulation line 2 upstream of the return port 12, positioned close to the return port 12. When the liquid is being supplied normally, the outlet valve 21 and the return valve 24 are in the open state. When it is necessary to sterilize the liquid supply circulation pipeline 2, the outlet valve 21 and the return valve 24 are in the closed state.

[0070] Furthermore, the outlet 11 and the return port 12 are located at the bottom of the storage tank 1, with the outlet 11 positioned lower than the return port 12. This arrangement allows the storage tank 1 to be emptied efficiently and completely using the outlet 11 at the bottom, aided by gravity. Additionally, the return port 12 is positioned higher than the outlet 11, ensuring that when the dialysate returns from the supply circulation line 2 to the storage tank 1, it mixes with the existing dialysate, thus guaranteeing that the dialysate flowing from the outlet 11 is a uniformly mixed solution.

[0071] In one embodiment, the bypass line 3 is provided with a temperature sensor 31 near the second end, and the hemodialysis fluid supply device further includes a controller, which is electrically connected to the temperature sensor 31 and the heater 22.

[0072] When sterilizing the supply circulation pipeline 2, it is necessary to ensure that the temperature at the second end near the return port 12 at the end of the pipeline also meets the sterilization requirements. Therefore, a temperature sensor 31 can be installed at this location. This temperature sensor 31 is used to detect the dialysate temperature at the end of the supply circulation pipeline 2 in real time. When the dialysate temperature is lower than the preset sterilization temperature requirement (e.g., 80 degrees Celsius), the controller can adjust the operating parameters of the heater 22, so that the dialysate temperature at the end of the supply circulation pipeline 2 can stably meet the preset sterilization temperature requirement.

[0073] In one embodiment, the liquid supply device may further include a first drain pipe 4, one end of which is connected to the liquid supply circulation pipe 2 located between the second position 262 and the return valve 24, and a first vent valve 41 is provided on the first drain pipe 4.

[0074] In this embodiment, a first drain line 4 can be connected to the supply circulation line 2, specifically between the second position 262 and the return valve 24. When sterilizing the supply circulation line 2, the first drain valve 41 is in a closed state. After sterilization of the supply circulation line 2, the first drain valve 41 can be opened and the circulation pump 23 can be started, so that the dialysate in the sterilized circulation line can be efficiently and thoroughly discharged out through the first drain line 4, preventing the residual sterilized liquid (heated dialysate) from mixing with the newly supplied dialysate, thereby causing negative effects.

[0075] In one embodiment, the heater 22 is an electromagnetic non-contact heater 22.

[0076] The dialysate used in hemodialysis requires extremely high purity. Any impurities (such as metal ions, corrosive debris, etc.) entering the dialysate may pose a safety risk to the patient.

[0077] In this embodiment, the heater 22 can be an electromagnetic non-contact heater 22. When in use, the heating element (such as an electromagnetic coil) of the electromagnetic non-contact heater 22 is completely isolated from the dialysate. It also transfers induced heat to the internal dialysis through the pipe wall of the liquid supply circulation pipe 2. There are no physical contact points, which eliminates the risk of the heating element contaminating the dialysate from the source, thereby better meeting the need for sterile liquid supply in hemodialysis.

[0078] Furthermore, the power adjustment of electromagnetic non-contact heating features fast response and good linearity: the heating power can be quickly changed by adjusting the current frequency of the electromagnetic coil. The heater 22 can integrate a temperature detection unit, which can monitor the temperature of the dialysate in real time. With the real-time feedback from this temperature detection unit, precise fine-tuning of the dialysate temperature can be achieved.

[0079] In addition, since the heating element of the electromagnetic non-contact heater 22 does not come into contact with the dialysate during use, there is no scaling problem, which can significantly reduce the frequency and cost of maintenance, while extending the overall service life of the heater 22.

[0080] In one embodiment, the storage tank 1 is a closed tank body, and the tank body is also provided with a liquid inlet 13 and a cleaning port 14. The liquid inlet 13 is used to connect to the liquid inlet pipeline, and the liquid inlet pipeline is provided with a liquid inlet valve 130. The cleaning port 14 is equipped with a cleaning pipeline 5, and the cleaning pipeline 5 is provided with a cleaning valve 51.

[0081] In this embodiment, the storage tank 1 may also be provided with an inlet 13 and a cleaning port 14. The inlet 13 may be connected to an inlet pipe, through which dialysis fluid or a sterilizing cleaning solution (e.g., water) can be injected into the storage tank 1. An inlet valve 130 is provided on the inlet pipe, which can be opened when dialysis fluid needs to be injected into the storage tank 1. The cleaning port 14 is equipped with a cleaning pipe 5, one end of which can be connected to the liquid supply circulation pipe 2, and the other end of which can be connected to the storage tank 1 through the cleaning port 14.

[0082] When it is necessary to sterilize and clean the storage tank 1, the inlet valve 130 can be opened first to inject sterilizing and cleaning solution into the storage tank 1. After the sterilizing and cleaning solution is injected, the inlet valve 130 is closed, and the cleaning valve 51 and the outlet valve 21 are opened. The sterilizing and cleaning solution can circulate between the cleaning pipeline 5 and the storage tank 1 to form a sterilization circulation channel for the storage tank, thereby sterilizing and cleaning the storage tank 1.

[0083] Specifically, a liquid supply pump 25 may also be installed on the liquid supply circulation pipeline 2. The liquid supply pump 25 is located between the liquid outlet valve 21 and the heater 22. One end of the cleaning pipeline 5 is connected to the liquid supply circulation pipeline 2. The position where the cleaning pipeline 5 is connected to the liquid supply circulation pipeline 2 is the third position 263. The third position 263 is located between the heater 22 and the circulation pump 23.

[0084] In this embodiment, the sterilization circulation channel of the storage tank specifically includes: a storage tank 1, a liquid supply circulation pipeline 2 from the liquid outlet 11 to the third position 263, and a cleaning pipeline 5.

[0085] When sterilizing the storage tank 1, the heater 22 and the supply pump 25 can be started. The sterilizing cleaning solution circulates and is heated in the sterilization circulation channel of the storage tank. After the sterilizing cleaning solution reaches a preset temperature (e.g., 80 degrees Celsius or above), it can form a high-temperature sterilizing fluid to sterilize the storage tank 1 at high temperature.

[0086] Since the storage tank 1 has a relatively large volume to meet the needs of storing dialysate, the power of the supply pump 25 is greater than that of the circulation pump 23 to shorten the sterilization time of the storage tank 1. This increases the flow rate in the sterilization circulation channel of the storage tank, thereby shortening the sterilization time. A flow meter 27 can be installed between the supply pump 25 and the heater 22 to detect the current flow rate through the supply circulation pipeline 2. In use, the flow meter 27 can provide real-time feedback on the current flow rate in the supply circulation pipeline 2, allowing the controller to adjust the operating parameters of the supply pump 25 and the circulation pump 23 to match the current flow rate with the current operating conditions. Furthermore, the power of the heater 22 can also be increased to shorten the sterilization time of the storage tank 1.

[0087] In one embodiment, the liquid supply device further includes a second drain pipe 6, one end of which is connected to the liquid supply circulation pipe 2 located between the heater 22 and the circulation pump 23, and a second vent valve 61 is provided on the second drain pipe 6.

[0088] In this embodiment, before high-temperature sterilization of the storage tank 1, the dialysate in the storage tank 1 needs to be drained. To drain the dialysate in the storage tank 1, the supply device can also be equipped with a second drain pipe 6. One end of the second drain pipe can be connected to the supply circulation pipe 2 located between the heater 22 and the circulation pump 23. More specifically, one end of the second drain pipe can be located at a point. This configuration allows for the complete drainage of the dialysate in the storage tank 1 and the supply pipe between the outlet 11 and the third position 263, minimizing the amount of residual dialysate.

[0089] Specifically, when it is necessary to empty the storage tank 1, the second vent valve 61 can be opened and the liquid supply circulation pump 23 can be started, thereby efficiently and thoroughly draining the dialysate from the storage tank 1 and the liquid supply pipeline between the outlet 11 of the storage tank 1 and the third position 263.

[0090] In one embodiment, the hemodialysis fluid supply device has a first trigger for sterilizing the fluid supply circulation pipeline 2 and a second trigger for sterilizing the storage tank 1; when the second trigger is triggered, the cleaning valve 51 is in the open state, the fluid supply pump 25 is in the start state, the heater 22 is in the start state, the outlet valve 21 is in the open state, and the return valve 24 is in the closed state.

[0091] In this embodiment, the hemodialysis fluid supply device has a first triggering part for sterilizing the fluid supply circulation pipeline 2 and a second triggering part for sterilizing the storage tank 1.

[0092] Specifically, the first and second trigger units can be located on the outer casing of the hemodialysis fluid supply device, integrated into a mobile terminal APP, or located on a remote control, etc. For example, taking the first and second trigger units located on the outer casing of the hemodialysis fluid supply device as an example, they can specifically be touch buttons on the outer casing. When the first trigger unit is triggered, the hemodialysis fluid supply device enters a first mode for sterilizing the fluid supply circulation pipeline 2; when the second trigger unit is triggered, the hemodialysis fluid supply device enters a second mode for sterilizing the storage tank 1. The controller of the hemodialysis fluid supply device can be electrically connected to the first and second trigger units, and the controller can receive the corresponding trigger signal when either the first or second trigger unit is triggered.

[0093] like Figure 1As shown, specifically, when the first trigger is triggered, the liquid outlet valve 21 and the liquid return valve 24 are in the closed state, the sterilization circulation valve 30 is in the open state, the cleaning valve 51 is in the closed state, the circulation pump 23 is started, the heater 22 is started, and the bypass pipeline 3 can cooperate with the liquid supply circulation pipeline 2 between the first position 261 and the second position 262 to form a sterilization circulation pipeline.

[0094] like Figure 2 As shown, when the second trigger is triggered, the cleaning valve 51 is in the open state, the liquid supply pump 25 is in the start state, the heater 22 is in the start state, the liquid outlet valve 21 is in the open state, the liquid return valve 24 is in the closed state, and the liquid storage tank 1, the liquid outlet 11 to the third position 263 liquid supply circulation pipeline 2, and the cleaning pipeline 5 can cooperate to form a liquid storage tank sterilization circulation channel.

[0095] The sterilization time required for the storage tank 1 is longer than that for the supply circulation pipeline 2, but the required sterilization frequency is lower. In this embodiment, by setting different triggers to correspond to different modes, it is possible to achieve independent sterilization of the supply circulation pipeline 2 or the storage tank 1, thereby better meeting the differentiated sterilization needs of the storage tank 1 and the supply circulation pipeline 2.

[0096] In one embodiment, the storage tank 1 is equipped with a sterilization device 15.

[0097] In this embodiment, a sterilization device 15 can be installed inside the storage tank 1 to sterilize the interior of the storage tank 1. Specifically, the sterilization device 15 can be an ultraviolet sterilization device 15, or it can be other types, such as an ozone sterilization device 15. In this embodiment, an ultraviolet sterilization device 15 is used as an example. After the ultraviolet sterilization device 15 is activated, it can kill bacteria, viruses, and botulinum toxin in the storage tank 1. Since the ultraviolet sterilization device 15 does not affect the composition of the dialysate stored subsequently, it can better meet the storage requirements of the dialysate. Specifically, the ultraviolet sterilization device 15 can be installed on the top of the storage tank 1, for example, at the center of the top of the storage tank 1. The ultraviolet sterilization device 15 does not need to be in direct contact with the dialysate in the storage tank 1. Of course, the ultraviolet sterilization device 15 can also be installed in other positions, and it can also be in contact with the dialysate.

[0098] In one embodiment, the end of the cleaning pipe 5 extends into the liquid storage tank 1, and a spray ball 16 is provided at the end of the cleaning pipe 5.

[0099] In this embodiment, the end of the cleaning pipe 5 can extend into the liquid storage tank 1 through the cleaning port 14. The end of the cleaning pipe 5 is provided with a spray ball 16. The spray ball 16 can be rotatably connected to the end of the cleaning pipe 5. When pressurized fluid flows to the spray ball 16, it forms a 360° water curtain that washes all areas of the tank wall, thereby achieving an ideal cleaning effect.

[0100] In one embodiment, a pressure sensor 17 is provided inside the liquid storage tank 1.

[0101] In this embodiment, a pressure sensor 17 can be installed inside the storage tank 1 to detect the pressure inside the storage tank 1. Specifically, the pressure sensor 17 can be installed at the bottom of the storage tank 1. Since there is a corresponding relationship between changes in liquid level and changes in pressure, the pressure sensor 17 can be used to measure the liquid level inside the storage tank 1. When the pressure value is too low (corresponding to a low liquid level), the inlet valve 130 is triggered to open, replenishing the dialysate into the tank to prevent the liquid in the tank from running out and causing the liquid supply to be interrupted. When the pressure value is too high (corresponding to a high liquid level), the drain valve is triggered to open or close the inlet valve 130 to prevent the liquid from overflowing outside the tank, thus avoiding waste of dialysate and environmental pollution.

[0102] When sterilizing the storage tank 1, the liquid inside the tank expands due to the heating of the heater 22, which causes the pressure to rise. The pressure sensor 17 can be used to monitor the pressure during the sterilization process to prevent overpressure damage to the storage tank 1.

[0103] Furthermore, the fluid supply circulation line 2 can be a pressure-sensitive line, and its connection to the dialysis machine must be within a predetermined pressure range to allow the dialysate to flow into the dialysis machine via self-priming. To ensure that the above pressure requirements are met, the pressure sensor 17 can monitor the supply pressure in real time. The pressure sensor 17 can be electrically connected to the controller. Additionally, the circulation pump 23 can also be electrically connected to the controller. When the pressure detected by the pressure sensor 17 indicates that the current pressure cannot guarantee the predetermined pressure range required by the dialysis machine, the operating parameters of the circulation pump 23 can be adjusted to regulate the pressure to the predetermined range.

[0104] In one embodiment, a filter mechanism is also provided upstream of the inlet valve 130 on the inlet pipeline.

[0105] The purity of hemodialysis fluid directly affects patient safety. During the fluid inlet process, external impurities (including rust particles from pipes, residual microcolloids in purified water, and microorganisms such as bacteria and fungal spores) can enter the storage tank 1, contaminating the dialysate and potentially clogging the downstream supply pump 25 and heater 22, leading to equipment malfunction. To intercept contaminants at the source, improve dialysate purity, protect downstream core components, and extend equipment life, a filtration mechanism can be installed upstream of the inlet valve 130 in the inlet pipeline.

[0106] The filtration mechanism can be a combination of multiple filters, each with different filtration accuracies. For example, it can include at least a coarse filter and a fine filter along the fluid flow direction. The coarse filter can intercept particulate impurities, while the fine filter can intercept bacteria, microorganisms, etc.

[0107] In one embodiment, a mixing device is also provided upstream of the liquid inlet pipeline.

[0108] In this embodiment, the mixing device is used to achieve automated and precise mixing of dialysate. Specifically, the mixing device can control the flow rate of different stock solutions (such as concentrated dialysate A, solution B, and purified water) through a preset program, and mix them online to form a dialysate that meets clinical standards. This effectively reduces the ratio error caused by traditional manual mixing and completely avoids electrolyte disturbances in patients due to inaccurate mixing.

[0109] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more.

[0110] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0111] The above are merely a few embodiments of this utility model. Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in this utility model. However, the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. A fluid supply device for hemodialysis, characterized in that, The liquid supply device includes: A liquid storage tank, wherein the liquid storage tank is provided with a liquid outlet and a liquid return port; A liquid supply circulation pipeline, one end of which is connected to the liquid outlet and the other end of which is connected to the liquid return port; A liquid outlet valve is provided on the liquid supply circulation pipeline and is located downstream of the liquid outlet. A heater, which is disposed on the liquid supply circulation pipeline, is used to heat the fluid flowing through the heater; A circulation pump is installed on the liquid supply circulation pipeline to provide driving force for the fluid in the liquid supply circulation pipeline; A return valve is provided on the liquid supply circulation pipeline and located upstream of the return port; A bypass line has a first end and a second end. The first end is connected to a first position of the liquid supply circulation line, and the second end is connected to a second position of the liquid supply circulation line. In the direction of fluid flow in the liquid supply circulation line, the first position is located downstream of the outlet valve, and the second position is located upstream of the return valve. A sterilization circulation valve, wherein the sterilization circulation valve is located in the bypass pipeline; When the liquid supply circulation pipeline is sterilized, the liquid outlet valve and the liquid return valve are in the closed state, the sterilization circulation valve is in the open state, the circulation pump is started, the heater is started, and the bypass pipeline can cooperate with the liquid supply circulation pipeline between the first position and the second position to form a sterilization circulation pipeline.

2. The fluid supply device for hemodialysis as described in claim 1, characterized in that, The bypass pipeline is equipped with a temperature sensor near the second end, and the hemodialysis fluid supply equipment also includes a controller, which is electrically connected to the temperature sensor and the heater.

3. The fluid supply device for hemodialysis as described in claim 1, characterized in that, The liquid supply device further includes a first drain pipe, one end of which is connected to the liquid supply circulation pipe located between the second position and the return valve, and a first vent valve is provided on the first drain pipe.

4. The fluid supply device for hemodialysis as described in claim 1, characterized in that, The heater is an electromagnetic non-contact heater.

5. The fluid supply device for hemodialysis as described in claim 4, characterized in that, The heater has an integrated temperature detection unit.

6. The fluid supply device for hemodialysis as described in claim 1, characterized in that, The outlet and the return port are located at the bottom of the storage tank, with the outlet positioned lower than the return port.

7. The fluid supply device for hemodialysis as described in claim 1, characterized in that, The storage tank is a closed tank body, which is also provided with a liquid inlet and a cleaning port. The liquid inlet is used to connect to the liquid inlet pipeline, and the liquid inlet pipeline is provided with a liquid inlet valve. The cleaning port is equipped with a cleaning pipeline, and the cleaning pipeline is provided with a cleaning valve.

8. The fluid supply device for hemodialysis as described in claim 7, characterized in that, A liquid supply pump is also installed on the liquid supply circulation pipeline. The liquid supply pump is located between the liquid outlet valve and the heater. One end of the cleaning pipeline is connected to the liquid supply circulation pipeline. The position where the cleaning pipeline is connected to the liquid supply circulation pipeline is the third position, which is located between the heater and the circulation pump.

9. The fluid supply device for hemodialysis as described in claim 8, characterized in that, The liquid supply device further includes a second drain pipe, one end of which is connected to the liquid supply circulation pipe located between the heater and the circulation pump, and a second vent valve is provided on the second drain pipe.

10. The fluid supply device for hemodialysis as described in claim 8, characterized in that, The hemodialysis fluid supply device has a first triggering part for sterilizing the fluid supply circulation pipeline and a second triggering part for sterilizing the storage tank; When the second trigger is triggered, the cleaning valve is in the open state, the liquid supply pump is in the start state, the heater is in the start state, the liquid outlet valve is in the open state, and the liquid return valve is in the closed state.

11. The fluid supply device for hemodialysis as described in claim 7, characterized in that, The storage tank is equipped with a sterilization device.

12. The fluid supply device for hemodialysis as described in claim 7, characterized in that, The end of the cleaning pipeline extends into the storage tank, and a spray ball is installed at the end of the cleaning pipeline.

13. The fluid supply device for hemodialysis as described in claim 7, characterized in that, A pressure sensor is installed inside the liquid storage tank.

14. The fluid supply device for hemodialysis as described in claim 7, characterized in that, A filter mechanism is also provided upstream of the inlet valve on the inlet pipeline.

15. The fluid supply device for hemodialysis as described in claim 14, characterized in that, A mixing device is also installed upstream of the liquid inlet pipeline.

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