Automatic liquid supply system suitable for various hemodialysis machines

Abstract

The application discloses a full-automatic liquid supply system suitable for various hemodialysis machines, which comprises a liquid preparation device, a liquid supply device, a disinfection device, a centralized liquid supply pipeline, a hemodialysis machine working state recognition module, a liquid suction rod in-place detection device, a dialysis and disinfection mode recognition device and a control module. The full-automatic liquid supply system can conveniently obtain the working state of different brands of hemodialysis machines by detecting the position of the liquid suction rod of the hemodialysis machine and whether the working current of the hemodialysis machine exists or not, realizes the online operation of the centralized liquid supply system and hemodialysis machines of different brands and models, and the centralized liquid supply system can automatically obtain the working state of the hemodialysis machine, thereby supplying liquid; the hemodialysis machine and the centralized liquid supply do not need any operation of medical staff during dialysis, manpower and cost are saved, and the risk caused by manual misoperation and missed operation is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to a medical device, in particular to a full-automatic liquid supply system suitable for various hemodialysis machines. BACKGROUND

[0002] The centralized liquid supply system is a system that concentrates, filters and stores the concentrated liquid for dialysis and simultaneously delivers the liquid to multiple hemodialysis machines through a central liquid delivery pipeline. It has the advantages of saving manpower, space and reducing costs, and is currently used in dialysis centers at home and abroad.

[0003] The previous centralized liquid supply system concentrates the concentrated liquid in a preparation room, stores it in a sealed tank after filtration, and then delivers the concentrated liquid to each hemodialysis room through a central liquid delivery pipeline for dialysis. A quick connector is provided on the central liquid delivery pipeline, and the liquid suction pipeline is manually connected to the central liquid delivery pipeline for dialysis, and then disconnected after dialysis. Since a hemodialysis center has multiple hemodialysis rooms, and the hemodialysis machines are relatively dispersed, and there are many brands and models of hemodialysis machines in the hemodialysis rooms, the technologies of various equipment manufacturers are not universal, and it is difficult for the centralized liquid supply system to obtain online signals from the hemodialysis machines. How to be compatible with multiple hemodialysis machines is the key to building a full-automatic liquid supply system.

[0004] In addition, the full-automatic liquid supply system also has the following difficulties:

[0005] 1) A hemodialysis center often has multiple hemodialysis rooms, and the central liquid delivery pipeline needs to circulate through each hemodialysis room, the pipeline is relatively long, and the pressure difference between the first end and the last end is large, especially when crossing floors, the pipeline pressure is difficult to control, and in the past, only the liquid supply circuit could be considered to be increased, which is difficult to construct and expand in the future.

[0006] 2) The central liquid delivery pipeline needs to be pressurized to a large extent before supplying liquid to empty the pipeline air, so that the pipeline is fully filled before normal dialysis. At this time, if a hemodialysis machine is not separated from the centralized liquid supply, it can be damaged.

[0007] 3) Since all hemodialysis machines are connected in series on the central liquid delivery pipeline, when the centralized liquid supply system fails, all hemodialysis machines will not be able to dialyze normally.

[0008] 4) A hemodialysis machine needs to be dialyzed multiple times a day, and needs to be connected during dialysis, and disconnected during disinfection and standby. Frequent plugging and unplugging is not only cumbersome to operate, easy to miss operation, but also easy to cause the quick connector to age, which needs to be replaced and maintained frequently. Experience shows that the annual replacement cost of the quick connector for a 50-bed hemodialysis machine is about 4000 yuan.

[0009] 5) During the disinfection of the centralized fluid supply system, if the hemodialysis machine is not disconnected, the disinfectant will enter the suction chamber of the hemodialysis machine. If the connection to the hemodialysis machine is not disconnected during disinfection, the concentrated solution will come into direct contact with the disinfectant, which may lead to contamination and a risk of cross-infection.

[0010] 6) If the hemodialysis machine is not disconnected when it is in standby mode, the centralized fluid supply will continue to be delivered to the hemodialysis machine, which will cause the concentrate to overflow from the hemodialysis machine.

[0011] 7) During dialysis, the CPC female head and the CPC male head (when not dialyzed) are exposed to air, making it difficult to pass hospital infection control checks. Summary of the Invention

[0012] The purpose of this invention is to overcome at least one deficiency of the prior art and provide a fully automatic fluid supply system suitable for various hemodialysis machines.

[0013] The technical solution adopted in this invention is:

[0014] A fully automated fluid supply system suitable for various hemodialysis machines includes a fluid preparation device, a fluid supply device, a disinfection device, and a centralized fluid supply pipeline, and further includes:

[0015] Hemodialysis machine operating status identification module: including a current detector, which determines whether the hemodialysis machine is in working or standby mode by detecting the magnitude of the working current of the hemodialysis machine. When in standby mode, the fluid supply line connected to the hemodialysis machine is disconnected.

[0016] Suction rod in place detection device: used to determine whether the hemodialysis machine is using centralized fluid supply. When the suction rod is not in place, the hemodialysis machine is not using centralized fluid supply, and the fluid supply line connected to the hemodialysis machine is disconnected.

[0017] Dialysis and disinfection mode recognition device: It can identify whether the suction rod in place is locked. When the suction rod is locked, it is determined to be in disinfection mode; otherwise, it is in dialysis mode.

[0018] Control module: Based on the identification results of the hemodialysis machine working status identification module and the operating status parameters of the fully automatic fluid supply system, it controls the supply of dialysate to the hemodialysis machine or disconnects the connection, controls the preparation of the solution or controls the disinfection.

[0019] In some examples of fully automated fluid supply systems, the fluid supply device comprises three levels: a centralized fluid supply unit, a fluid supply sub-unit, and a hemodialysis machine terminal fluid supply unit, wherein:

[0020] The centralized liquid supply unit is used to prepare concentrated liquid, filter concentrated liquid, store concentrated liquid, and deliver concentrated liquid to the liquid supply sub-unit.

[0021] The centralized fluid supply unit and the fluid supply sub-unit are connected by pipelines, and the fluid supply sub-unit is used to supply concentrated fluid to the hemodialysis machines in the hemodialysis room;

[0022] The liquid supply sub-machine and the hemodialysis machine terminal liquid supply device are connected through pipelines, and the liquid outlet end of the hemodialysis machine terminal liquid supply device is connected with the liquid inlet end of the hemodialysis machine.

[0023] In some examples of the fully-automatic liquid supply system, the liquid supply sub-machine comprises a liquid storage tank, which is provided with a liquid supplement valve, a liquid discharge valve, a liquid level sensor, a waste liquid outlet, a liquid supply pump and a switching valve.

[0024] In some examples of the fully-automatic liquid supply system, the hemodialysis machine terminal liquid supply device is provided with a hemodialysis machine working state recognition module and an electric three-way valve, and the three ends of the electric three-way valve are respectively connected with the liquid suction pump pipeline of the hemodialysis machine, the liquid suction rod pipeline of the hemodialysis machine and the liquid supply pipeline.

[0025] In some examples of the fully-automatic liquid supply system, a circulation pipeline is arranged between the liquid supply sub-machine and the hemodialysis machine terminal liquid supply device.

[0026] In some examples of the fully-automatic liquid supply system, the liquid supply sub-machine is connected in parallel with multiple hemodialysis machine terminal liquid supply devices.

[0027] In some examples of the fully-automatic liquid supply system, the liquid supply sub-machine is further provided with an air filter element.

[0028] In some examples of the fully-automatic liquid supply system, multiple liquid supply sub-machines are connected in parallel downstream of the centralized liquid supply host machine.

[0029] In some examples of the fully-automatic liquid supply system, the disinfection device is an online hypochlorous acid disinfection device.

[0030] In some examples of the fully-automatic liquid supply system, the liquid suction rod locking position is provided with a color mark, and the color is used to distinguish whether the liquid suction rod is in a locked state.

[0031] The above technical features can be freely combined without conflict.

[0032] The beneficial effects of the present application are as follows:

[0033] The fully-automatic liquid supply system can automatically obtain the working state of the hemodialysis machine, so as to supply liquid, and the hemodialysis machine and the centralized liquid supply device do not need any operation by medical staff during dialysis, thereby saving manpower and cost, and avoiding the risks caused by manual misoperation and omission.

[0034] The full-automatic liquid supply system of the application uses a liquid supply branch set as an intermediate stage, which is placed in a hemodialysis room and only supplies concentrated liquid to a hemodialysis machine in the room, so that the pipeline is relatively short and low-pressure delivery of concentrated liquid can be realized. The pressure control of the pipeline is simpler, and the overall pipeline design is simplified.

[0035] When the liquid supply circuit of the centralized liquid supply host machine fails, the liquid supply branch set can continue to supply liquid for a period of time, and after the equipment pipeline personnel repair the failure, the liquid supply can continue, without stopping the repair of the previous centralized liquid supply system, disconnecting the filling pipeline of the hemodialysis machine, and then normally supplying liquid, thereby avoiding the situation that all hemodialysis machines cannot be normally dialyzed due to the failure of the centralized liquid supply host machine.

[0036] The full-automatic liquid supply system of the application does not need manual plugging of the quick connector, so there is no aging problem of the quick connector, the replacement and maintenance cost of the quick connector is saved, and the quick connector is not exposed to the air, thereby avoiding the problem that the hospital infection inspection fails. BRIEF DESCRIPTION OF DRAWINGS

[0037] Fig. 1 is the overall schematic diagram of the liquid supply device of some example systems of the application.

[0038] Fig. 2 is the schematic diagram of the liquid supply branch set of some example systems of the application.

[0039] Fig. 3 is the schematic diagram of the hemodialysis machine terminal liquid supply device of some example systems of the application. DETAILED DESCRIPTION

[0040] The embodiments of the application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the application, and cannot be understood as a limitation of the application.

[0041] In the description of the application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0042] In the description of the present application, the meaning of one or more is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features.

[0044] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be a fixed connection or a movable connection, or a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements, indirect communication or interaction relationship between two elements.

[0045] The following disclosure provides many different implementations or examples for implementing different aspects of the present application.

[0046] Reference Figs. 1-3 An automatic liquid supply system suitable for various hemodialysis machines, comprising a liquid preparation device, a liquid supply device, a disinfection device, a centralized liquid supply pipeline, and further comprising:

[0047] A hemodialysis machine working state recognition module: comprising a current detector, which determines whether the hemodialysis machine is in a working state or a standby state by detecting the size of the working current of the hemodialysis machine, and disconnects the liquid supply pipeline connected to the hemodialysis machine when in standby state;

[0048] A liquid suction rod in-place detection device: used to determine whether the hemodialysis machine uses centralized liquid supply, and disconnects the liquid supply pipeline connected to the hemodialysis machine when the liquid suction rod is not in place;

[0049] A dialysis and disinfection mode recognition device: used to determine whether the in-place liquid suction rod is in a locked state, and determines as a disinfection mode when the liquid suction rod is in a locked state, otherwise as a dialysis mode;

[0050] A control module: based on the recognition result of the hemodialysis machine working state recognition module and the operating state parameters of the automatic liquid supply system, controls the supply of dialysis liquid to the hemodialysis machine or disconnects the connection, controls the liquid preparation or controls the disinfection.

[0051] The liquid preparation device can perform liquid preparation processing as needed. The existing liquid preparation device can be used to achieve, such as the device disclosed in CN113682589A, or other known liquid preparation devices can be used to achieve.

[0052] The disinfection device is used to disinfect the pipelines and containers of the entire system before liquid supply. The disinfectant solution can be prepared by adding disinfectant or generated by electrolysis. In some examples of fully automatic liquid supply systems, the disinfection device is an online hypochlorous acid disinfection device. It has good disinfection effect and good safety. The disinfection device can use the existing disinfection device to achieve.

[0053] The current detector can be a socket with current detection. By inserting the power cord of the hemodialysis machine into the socket, the difference in current under different working conditions of the hemodialysis machine is used to determine whether the hemodialysis machine is in working condition (dialysis or disinfection).

[0054] The hemodialysis machine has a liquid suction rod and a liquid suction pump. The liquid suction rod is generally of a rotary locking type or a pressing locking type. When the hemodialysis machine is disinfected, the liquid suction rod is locked by rotating or pressing, so as to seal the liquid suction rod in the liquid suction chamber. When the hemodialysis machine is dialyzed, the liquid suction rod and the liquid suction chamber cannot be sealed, and the liquid suction rod is released by reverse rotation or pressing again. Therefore, by identifying the position of the liquid suction rod, it can be determined whether the hemodialysis machine is in a dialysis state or a disinfection state. Color marking identification is a very mature technology, and the marking can be achieved without damage, with lower overall use cost and better universality. In some examples of fully automatic liquid supply systems, the locking position of the liquid suction rod is provided with color marking, and the color is used to distinguish whether the liquid suction rod is in a locked state. When the liquid suction rod is in the locked position, the color marking sensor identifies the corresponding color marking, and determines that the hemodialysis machine is in a disinfection mode. Otherwise, the hemodialysis machine is in a dialysis mode. Of course, other ways such as photoelectric sensor, proximity switch, displacement sensor, etc. can also be used to achieve dialysis and disinfection mode identification by detecting light signal, magnetic field change, and height difference of the liquid suction rod.

[0055] The control module can be implemented by using an existing controller, such as a MODBUS controller. Specifically, the controller first acquires the working state of the centralized liquid supply extension machine through the MODBUS communication protocol. When the centralized liquid supply extension machine is sterilized, the terminal liquid supply device of the hemodialysis machine is disconnected from the pipeline connection of the hemodialysis machine, liquid supply is prohibited, and the indicator light is turned on. When the centralized liquid supply extension machine supplies liquid, it normally responds to the working of the hemodialysis machine. When the centralized liquid supply system normally supplies liquid, the controller successively collects the current signal of the hemodialysis machine power supply, the liquid suction rod in-place signal, and the liquid suction rod locking signal. When the hemodialysis machine current is less than the threshold value, the controller determines that the hemodialysis machine is on standby, and then disconnects the pipeline connection with the hemodialysis machine. Otherwise, it continues to determine whether the liquid suction rod is in place. If it is not in place, it is determined that the hemodialysis machine is using a barrel of liquid, and the module stops supplying liquid at this time. When the liquid suction rod is in place, it continues to determine whether the liquid suction rod is locked. If the liquid suction rod is locked, it is determined that the hemodialysis machine is being sterilized, and the connection pipeline with the hemodialysis machine is disconnected. If the liquid suction rod is not locked, the hemodialysis machine is in normal dialysis, the module normally supplies liquid, and the indicator light is turned on.

[0056] The combination of the automatic liquid preparation module and the online hypochlorous acid preparation module can realize the automatic operation of the centralized liquid supply system cleaning and disinfection, concentrated liquid preparation, and transportation to the hemodialysis machine as a whole without any manual operation, greatly saving the labor cost. Due to the full automation of cleaning and disinfection, liquid preparation, and transportation, online preparation and use of concentrated liquid can be realized, which meets the requirements of medical operation procedures for online preparation and use, and small amount and multiple times.

[0057] Reference Fig. 1 In some examples of the fully automatic liquid supply system, the liquid supply device includes a centralized liquid supply host, a liquid supply extension machine, and a terminal liquid supply device of a hemodialysis machine, which are three levels.

[0058] The centralized liquid supply host is used for preparing concentrated liquid, filtering, storing concentrated liquid, and transporting concentrated liquid to the liquid supply extension machine.

[0059] The centralized liquid supply host and the liquid supply extension machine are connected by a pipeline, and the liquid supply extension machine is used to provide concentrated liquid to the hemodialysis machine in the hemodialysis room.

[0060] The liquid supply extension machine and the terminal liquid supply device of the hemodialysis machine are connected by a pipeline, and the outlet of the terminal liquid supply device of the hemodialysis machine is connected to the inlet of the hemodialysis machine.

[0061] The centralized liquid supply host is large in size and is placed in the liquid preparation chamber. The centralized liquid supply host and the liquid supply substation are connected by a single pipeline. The liquid supply pipeline only delivers concentrated liquid and disinfectant to the liquid supply substation, and no liquid supply pressure is required. The liquid supply pipeline no longer needs to be switched to low-pressure liquid supply after high-pressure air is discharged. A higher pressure can be used on the main pipeline for delivery, which is beneficial to the circulation of concentrated liquid and the delivery of long pipelines, reduces the construction requirements, and has strong expandability. When the centralized liquid supply host delivers concentrated liquid, it sends a liquid supply flag to the liquid supply substation, and the liquid supply substation normally supplies liquid. When the centralized liquid supply host starts disinfection, it sends a disinfection flag to the liquid supply substation, and the liquid supply substation sends a cut-off command to the terminal liquid supply device of the hemodialysis machine, and the module cuts off the liquid supply.

[0062] The liquid supply substation is small in size and is placed in the hemodialysis chamber. It is used to supply concentrated liquid to the hemodialysis machine in the hemodialysis chamber and also serves as an intermediate level in the system, responsible for interacting with the centralized liquid supply host and the terminal liquid supply device of the hemodialysis machine. The liquid supply substation and the terminal liquid supply device of the hemodialysis machine are connected by a bus and a single pipeline, solving the problem of scattered hemodialysis machines that are difficult to construct.

[0063] The two-level liquid supply method is adopted. The main pipeline of the first level no longer has a liquid supply pressure limit, and a large horsepower pump can be used to deliver concentrated liquid, which is beneficial to the full circulation of concentrated liquid and reduces sediment. The delivery distance is longer, the expandability is strong, and it is beneficial to the addition of hemodialysis chambers and hemodialysis machines in the later period. The second-level liquid supply substation is provided in the hemodialysis chamber, which can maintain a constant low pressure of the second-level main pipeline for liquid supply, avoiding the risk of damage to the hemodialysis equipment by high pressure.

[0064] Reference Fig. 2 In some examples of the fully automatic liquid supply system, the liquid supply substation includes a liquid storage tank 1, which is provided with a liquid supplement valve 3, a liquid discharge valve 6, a liquid level sensor 4, a waste liquid outlet 7, a liquid supply pump 8, and a switching valve 10.

[0065] In some examples of the fully automatic liquid supply system, the liquid supply substation is also provided with an air filter 2.

[0066] Specifically, the liquid supply substation includes a liquid storage tank 1, which is provided with an air filter 2, a liquid supplement valve 3, a liquid level sensor 4, a maintenance ball valve 5, a liquid discharge valve 6, a waste liquid outlet 7, a liquid supply pump 8, and a switching valve 10. The switching valve 10 is a three-way valve that is connected to the waste liquid outlet 7 and the liquid supply pipeline 9. The liquid supplement valve 3 is connected to the main liquid supply pipeline of the centralized liquid supply host. The liquid supply pipeline 9 is also provided with a liquid supply pump 8, and the liquid supply pipeline 9 is also connected in parallel to multiple hemodialysis machines. The working principle is as follows:

[0067] Liquid supplement: When the liquid level sensor detects that the liquid level in the liquid storage tank is low, it queries whether the centralized liquid supply host is in a liquid supply state. If so, the liquid supplement valve is opened to quickly supplement liquid. The liquid level sensor stops supplementing liquid when it detects a high liquid level. The liquid storage tank is provided with an air filter at the top to ensure that the liquid storage tank is not affected by the pressure of the upper liquid supply main pipeline.

[0068] Liquid supply: the liquid supply substation is placed in the hemodialysis room, and is only responsible for supplying concentrated liquid to a hemodialysis machine in a hemodialysis room. The pipeline is relatively short, and a pump with a smaller power is selected for the liquid supply pump, so as to realize low-pressure delivery of the concentrated liquid. Before liquid supply, a locking command is sent to the terminal liquid supply device of the connected hemodialysis machine, and a switching valve is opened to fill the pipeline. After the pipeline is filled, an unlocking command is sent to the terminal liquid supply device of the connected hemodialysis machine, and the switching valve is closed for normal liquid supply.

[0069] At the same time, when the liquid supply circuit of the centralized liquid supply host fails, the liquid supply substation can continue to supply liquid for a period of time. During the repair of the equipment pipeline, liquid supply can continue, without having to shut down the previous centralized liquid supply system for repair, disconnect the filling pipeline of the hemodialysis machine, and then normally supply liquid, thereby avoiding the situation that all hemodialysis machines cannot be normally dialyzed due to the failure of the centralized liquid supply host.

[0070] Reference Fig. 3 In some examples of the fully automatic liquid supply system, a hemodialysis machine working state recognition module and an electric three-way valve are arranged on the hemodialysis machine terminal liquid supply device. The three ends of the electric three-way valve are respectively connected with the liquid suction pump pipeline, the liquid suction rod pipeline and the liquid supply pipeline of the hemodialysis machine. A double-color indicator lamp is further arranged for better indication of the working state.

[0071] When the hemodialysis machine terminal liquid supply device receives a locking command from the liquid supply substation, the connection pipeline with the hemodialysis machine is cut off, and the hemodialysis machine dialysis signal is not responded to, so as to ensure that the disinfectant does not enter the hemodialysis machine when the centralized liquid supply system is disinfected. When the hemodialysis machine is on standby or is being disinfected, the hemodialysis machine terminal liquid supply device cuts off the connection pipeline with the hemodialysis machine, so as to ensure that liquid is not continuously supplied to the hemodialysis machine to cause overflow and to prevent the disinfectant from directly contacting the concentrated liquid in the hemodialysis machine. At the same time, this also avoids manual insertion of the quick connector, avoids the problem that the quick connector is exposed to the air to cause the hospital infection inspection to fail, and solves the aging problem of the quick connector, thereby saving the replacement and maintenance cost of the quick connector.

[0072] In some examples of the fully automatic liquid supply system, a circulation pipeline is arranged between the liquid supply substation and the hemodialysis machine terminal liquid supply device. In this way, the dead space can be avoided, and the liquid supply quality can be better ensured.

[0073] In some examples of the fully automatic liquid supply system, multiple hemodialysis machine terminal liquid supply devices are connected in parallel behind the liquid supply substation.

[0074] In some examples of the fully automatic liquid supply system, multiple liquid supply substations are connected in parallel downstream of the centralized liquid supply host.

[0075] The above is a further detailed description of the present application, which cannot be considered as a limitation of the specific implementation of the present application. For those skilled in the art to which the present application belongs, simple deductions or replacements without departing from the concept of the present application are within the protection scope of the present application.

Claims

1. A fully automatic liquid supply system suitable for various hemodialysis machines, comprising a liquid preparation device, a liquid supply device, a sterilization device, and a centralized liquid supply pipeline, characterized in that, Also include: Hemodialysis machine working state recognition module: including current detector, by detecting the size of hemodialysis machine working current to determine whether the hemodialysis machine is in working state or standby state, when standby, disconnect the liquid supply pipeline connected with the hemodialysis machine; Liquid suction rod in position detection device: for determining whether the hemodialysis machine uses centralized liquid supply, when the liquid suction rod is not in position, the hemodialysis machine does not use centralized liquid supply, disconnect the liquid supply pipeline connected with the hemodialysis machine; Dialysis and disinfection mode recognition device: identify whether the in place liquid suction rod is in the locked state, when the liquid suction rod is in the locked state, it is determined as disinfection mode, otherwise as dialysis mode; Control module: based on the recognition result of hemodialysis machine working state recognition module, the running state parameters of full-automatic liquid supply system, control to supply dialysis liquid to hemodialysis machine or disconnect, control liquid preparation or control disinfection; The liquid supply device includes centralized liquid supply host, liquid supply extension and hemodialysis machine terminal liquid supply device three levels, wherein: The centralized liquid supply host is used for preparing concentrated liquid, filtering, storing concentrated liquid and delivering concentrated liquid to the liquid supply extension; The centralized liquid supply host and the liquid supply extension are connected by pipeline, and the liquid supply extension is used for providing concentrated liquid to the hemodialysis machine in the hemodialysis room; The liquid supply extension and the hemodialysis machine terminal liquid supply device are connected by pipeline, and the liquid outlet of the hemodialysis machine terminal liquid supply device is connected with the liquid inlet of the hemodialysis machine; The liquid supply extension includes liquid storage tank, the liquid storage tank is provided with liquid supplement valve, liquid discharge valve, liquid level sensor, waste liquid port, liquid supply pump and switch valve; The hemodialysis machine terminal liquid supply device is provided with hemodialysis machine working state recognition module and electric three-way valve, and the three ends of the electric three-way valve are respectively connected with the liquid suction pump pipeline, the liquid suction rod pipeline and the liquid supply pipeline of the hemodialysis machine; The liquid supply extension and the hemodialysis machine terminal liquid supply device are connected by pipeline.

2. The full-automatic liquid supply system according to claim 1, characterized in that, The liquid supply extension is connected with multiple hemodialysis machine terminal liquid supply devices in parallel.

3. The full-automatic liquid supply system according to claim 1, characterized in that, The liquid supply extension is also provided with air filter element.

4. The full-automatic liquid supply system according to claim 1, characterized by The centralized liquid supply host is connected with multiple liquid supply extensions in parallel downstream.

5. The full-automatic liquid supply system according to claim 1, wherein The disinfection device is online hypochlorous acid disinfection device.

6. The full-automatic liquid supply system according to claim 1, characterized in that, The liquid suction rod locking position is provided with color marking, and the color is used to distinguish whether the liquid suction rod is in the locked state.

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