Liquid dividing and metering device and method based on blood purification equipment

Abstract

The invention relates to a liquid dividing and metering device and method based on blood purification equipment, and relates to the field of blood purification. The device comprises a liquid pot structure and a weighing sensor, the liquid pot structure comprises at least one liquid pot, the liquid pot is provided with an upper port and a lower port, the upper port is connected with a gas pipeline and used for inputting or outputting gas, the lower port is connected with a liquid pipeline and used for inputting or outputting liquid, and the liquid pots are not communicated with one another. The weighing sensor measures the weight of the liquid pot in real time. Input and output of liquid are controlled through an air pump, an air valve and a pinch valve, and accurate metering of dialysate, displacement liquid and waste liquid is achieved. According to the liquid segmentation metering method, the flow velocity, the flow and the dehydration amount of the liquid can be calculated based on the data of the weighing sensor by controlling the air pressure in the liquid pot. Input and output of various kinds of liquid in the blood purification process can be efficiently controlled, and the accuracy of liquid metering and the stability of the purification process are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and in particular to a liquid segmentation and metering device and method based on a blood purification device. Background Art

[0002] Blood purification equipment plays a vital role in patient care and fluid management in many industrial and medical applications. Accurately measuring and controlling fluid flow is essential to ensure the effectiveness and safety of therapies such as dialysis and continuous renal replacement therapy. According to the industry standard "YY 0645-2018 Continuous Blood Purification Equipment", there are clear requirements for dialysate pump flow error, replacement fluid pump flow error, dehydration error, and fluid balance error.

[0003] At present, the known blood purification equipment mainly adopts the following two methods to achieve error control: the first method is to use a large-range weight sensor to measure the large liquid bag, but because the higher the range of the weight sensor, the lower the accuracy, resulting in a large measurement error. The software algorithm cannot make up for the lack of hardware accuracy, resulting in large errors in the flow rate of the dialysate pump, the flow rate of the replacement fluid pump, the dehydration error, and the liquid balance error. The second method uses three sets of independent small-range weight sensors, liquid pumps, and clamp valves for liquid segmentation measurement. Although the small-range weight sensor has a high measurement accuracy, it may still cause a large dehydration error due to the superposition of the errors of the three sensors. In addition, the existing method has another significant shortcoming, that is, the external liquid bag needs to be hung high and rely on gravity to drive the liquid flow. This method not only limits the installation position of the liquid bag, but also easily causes the liquid bag to be hung unstable, increasing the inconvenience and risk during use.

[0004] The shortcomings of these existing methods are obvious, hindering the accurate measurement and control of liquids by blood purification equipment. The use of a large-range weight sensor reduces the accuracy of the measurement due to limited accuracy; the method of using multiple small-range weight sensors affects the overall measurement accuracy due to error accumulation; in addition, the problem that the liquid bag needs to be hung high to use gravity to drive the flow of liquid increases the difficulty of equipment installation and operation. Therefore, there is an urgent need for a new liquid segmentation and metering method based on blood purification equipment to improve measurement accuracy, reduce error accumulation, and achieve independent control of liquid flow, while overcoming the limitations of the position of the external liquid bag to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a liquid segmentation metering device and method based on a blood purification device. In order to solve the technical problem that the existing blood purification device cannot accurately measure and control the liquid flow due to the insufficient accuracy of the large-range weight sensor and the accumulation of errors of multiple small-range sensors, resulting in large flow errors and dehydration errors of the dialysate pump and the replacement fluid pump, a new liquid segmentation metering method is urgently needed to improve the measurement accuracy, reduce the error and realize the independent control of the liquid flow.

[0006] To achieve the above-mentioned purpose, the present invention provides a liquid division and metering device based on a blood purification device, the liquid division and metering device comprising: a liquid pot structure, comprising at least one liquid pot, any one of the liquid pots being provided with an upper and lower port, the upper port being connected to a gas pipeline for inputting or outputting gas, and the lower port being connected to a liquid pipeline for inputting or outputting gas, wherein when there are multiple liquid pots, the liquid pots are not connected to each other; a weighing sensor, carrying at least one liquid pot in the liquid pot structure, and being used to measure the total weight of at least one liquid pot in real time.

[0007] The present invention also provides a liquid division and metering method based on a blood purification device, and the liquid division and metering method based on the blood purification device is applied to the liquid division and metering device based on the blood purification device described above, wherein the liquid division and metering method includes: controlling the gas pipeline connected to the upper port of the liquid kettle to extract gas from the liquid kettle, and controlling the liquid pipeline connected to the lower port of the liquid kettle to be connected to the external liquid bag, and inputting the liquid in the external liquid bag into the liquid kettle based on the pressure value in the liquid kettle until the liquid level inside the liquid kettle is out of the upper area of ​​the liquid kettle; recording the first weight value marked by the weighing sensor, and the first weight value corresponding timestamp; controlling the gas pipeline connected to the upper port of the liquid kettle to be in a connected state with the external air, and controlling the liquid pipeline connected to the lower port of the liquid kettle to be connected with the extracorporeal circulation system pipeline of the blood purification equipment, so that the extracorporeal circulation system pipeline of the blood purification equipment obtains liquid from the liquid kettle; recording the second weight value marked by the weighing sensor, and the timestamp corresponding to the second weight value; based on the first weight value and the timestamp corresponding to the first weight value, and the second weight value and the timestamp corresponding to the second weight value, calculating the flow rate and flow of the liquid corresponding to the liquid kettle, wherein the liquid kettle is a dialysis fluid kettle or a replacement fluid kettle.

[0008] Alternatively, control the gas pipeline connected to the upper port of the first liquid kettle to extract gas from the first liquid kettle, and control the liquid pipeline connected to the lower port of the first liquid kettle to be in a connected state with the first external liquid bag, and input the liquid in the first external liquid bag into the first liquid kettle based on the pressure value in the first liquid kettle until the liquid level inside the first liquid kettle is in the upper area of ​​the first liquid kettle, wherein the first liquid kettle is a dialysis fluid kettle or a replacement fluid kettle; control the gas pipeline connected to the upper port of the second liquid kettle to pump gas into the second liquid kettle, and control the liquid pipeline connected to the lower port of the second liquid kettle to be in a connected state with the second external liquid bag, and input the liquid in the second external liquid bag into the second external liquid bag based on the pressure value of the content of the second liquid kettle until the liquid level inside the second liquid kettle is in the lower area of ​​the second liquid kettle, wherein the second liquid kettle is a waste liquid kettle; record the third weight value marked by the weighing sensor, and the timestamp corresponding to the third weight value; controlling the gas pipeline connected to the upper port of the first liquid pot to be in a connected state with the external air, and controlling the liquid pipeline connected to the lower port of the first liquid pot to be in a connected state with the extracorporeal circulation system pipeline of the blood purification equipment, so as to input liquid into the extracorporeal circulation system pipeline of the blood purification equipment; controlling the gas pipeline of the upper port of the second liquid pot to be in a connected state with the external air, and controlling the liquid pipeline connected to the lower port of the second liquid pot to be in a connected state with the extracorporeal circulation system pipeline of the blood purification equipment, so that the extracorporeal circulation system pipeline of the blood purification equipment inputs liquid into the second liquid pot; recording the fourth weight value marked by the weighing sensor, and the timestamp corresponding to the fourth weight value; calculating the dehydration amount and dehydration flow rate of the blood purification equipment based on the third weight value and the timestamp corresponding to the third weight value, and the fourth weight value and the timestamp corresponding to the fourth weight value.

[0009] The present invention also provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any one of the above methods when executing the computer program.

[0010] The present invention also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of any of the above-mentioned methods are implemented.

[0011] The liquid segmentation and metering device and method based on the blood purification equipment provided by the present invention realizes accurate flow control of different liquids by segmenting and independently metering the liquid inside the liquid pot. Compared with the prior art, the present invention adopts an independent weighing sensor of a single liquid pot to realize accurate metering of the liquid, avoiding the problem of error accumulation of multiple sensors. At the same time, the pressure control means in the liquid pot is utilized, combined with the gas pump and the air valve, to ensure that the liquid can be accurately input from the liquid bag into the liquid pot, and the liquid is input into the blood purification equipment through the liquid pump, so as to achieve accurate control of the liquid input and output. In addition, the present invention is not restricted by the placement position of the liquid bag. Compared with the existing design that requires the liquid bag to be suspended at a high place and driven by gravity, the design of the present invention allows the liquid bag to be placed at any height of the equipment, thereby greatly improving the installation flexibility and operational convenience of the equipment.

[0012] In addition, the present invention provides a function of real-time monitoring of liquid level, and monitors and prompts the liquid level through upper and lower liquid level detectors to ensure the safety and accuracy of liquid metering. Overall, the device and method greatly improve the accuracy of liquid flow control, reduce the errors of dialysate pumps, replacement fluid pumps and dehydration, ensure the stability and safety of blood purification equipment, meet the industry's demand for high-precision liquid control, and are suitable for a variety of blood purification scenarios such as dialysis and continuous renal replacement therapy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of a liquid splitting and metering device based on a blood purification device in one embodiment of the present invention; Figure 2 This is a flow chart of a liquid segmentation and metering method based on a blood purification device in one embodiment of the present invention; Figure 3 This is a flow chart of a liquid segmentation and metering method based on a blood purification device in another embodiment of the present invention; Figure 4 It is a schematic block diagram of the structure of a computer device according to an embodiment of the present invention.

[0014] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] Reference Figure 1 The embodiment of the present invention provides a liquid splitting and metering device based on a blood purification device, and the liquid splitting and metering device includes: A liquid pot structure, comprising at least one liquid pot, any one of which is provided with an upper and lower port, the upper port being connected to a gas pipeline for inputting or outputting gas, and the lower port being connected to a liquid pipeline for inputting or outputting gas, wherein when there are multiple liquid pots, the liquid pots are not connected to each other; A weighing sensor supports at least one of the liquid jugs in the liquid jug structure and is used to measure the total weight of the at least one liquid jug in real time.

[0017] It should be noted that the traditional method uses a large-range weight sensor to measure a large liquid bag, but the accuracy is reduced due to the large range, and it cannot meet the requirements of high-precision measurement. However, the present invention places multiple liquid pots on the same weighing sensor. Since the capacity of each liquid pot is relatively small, the total weight is also within the optimal range of the weighing sensor, thereby improving the measurement accuracy.

[0018] Secondly, the design of multiple liquid jugs being disconnected from each other avoids the problem of error accumulation of multiple small-range sensors. In the traditional method, multiple small-range weight sensors are used to measure the weight of different liquids, but the errors of each sensor may be superimposed on each other, resulting in an increase in the overall measurement error. The present invention measures the total weight change of all liquid jugs with one weighing sensor, eliminating the error accumulation between multiple sensors.

[0019] For example, when the flow of dialysate needs to be precisely controlled, it is only necessary to operate the liquid input and output of the dialysate jug while keeping the liquid levels of the replacement fluid jug and the waste fluid jug unchanged. Since the jugs are not connected to each other, changes in the weight of the liquid in the dialysate jug will be directly reflected in changes in the total weight. By monitoring the changes in the total weight in real time with a weighing sensor, the inflow or outflow of dialysate can be accurately calculated. This method avoids inaccurate measurements caused by the superposition of errors from multiple sensors and improves the accuracy of liquid flow control.

[0020] The same principle also applies to the precise measurement and control of the replacement fluid. When the replacement fluid flow needs to be adjusted, only the liquid in and out of the replacement fluid pot needs to be adjusted, and the liquid level of the dialysate pot and the waste fluid pot remains constant. The total weight change measured by the weighing sensor is completely attributed to the change in the liquid in the replacement fluid pot, ensuring the precise control of the replacement fluid flow.

[0021] In addition, the design of the upper and lower ports also plays a key role. The lower port is connected to the liquid pipeline to ensure that the liquid can be smoothly input and output; the upper port is connected to the gas pipeline to balance the air pressure inside and outside the liquid pot. This design avoids the problem of air pressure imbalance that may occur during liquid transportation, prevents the generation of bubbles and the instability of liquid flow, thereby further improving the accuracy of measurement and control.

[0022] Through the combination of this liquid pot structure and the weighing sensor, the present invention realizes independent and accurate measurement and control of dialysate, replacement fluid and waste fluid, overcoming the problems of insufficient precision and error accumulation in traditional methods. This is of great significance for improving the performance of blood purification equipment, and can effectively improve the safety and effectiveness of treatment and protect the health of patients.

[0023] In one example, when the liquid pot structure contains a dialysate pot, the gas pipeline connected to the upper port of the dialysate pot is divided into a first branch and a second branch, the first branch is connected to the external air through a first air valve, and the second branch is connected to the external air through a first air pump and a second air valve in turn; the liquid pipeline connected to the lower port of the dialysate pot is divided into a third branch and a fourth branch, the third branch is connected to an external large dialysate liquid bag through a first clamping valve, and the fourth branch is connected to the extracorporeal circulation system pipeline of the blood purification equipment through a first liquid pump; wherein, the dialysate pot inputs liquid from the large dialysate liquid bag into the dialysate pot through the combination of the first clamping valve, the second air valve and the first air pump, and inputs liquid from the dialysate pot to the extracorporeal circulation system pipeline of the blood purification equipment through the combination of the first air valve and the first liquid pump.

[0024] In this example, the bottleneck problem caused by the accumulation of sensor errors and insufficient measurement accuracy in traditional blood purification equipment was successfully overcome by cleverly arranging the connection methods of the gas and liquid pipelines of the dialysate pot. Specifically, the gas pipeline connected to the upper port of the dialysate pot is divided into a first branch and a second branch, wherein the first branch is connected to the external air through a first air valve to ensure that the internal air pressure of the dialysate pot is balanced with the external environment during certain operations. The second branch allows air to be pumped into the dialysate pot through the series connection of the first air pump and the second air valve, providing air pressure assistance to control the flow direction and flow rate of the liquid.

[0025] The liquid pipeline at the lower port of the dialysate pot is also carefully designed and is divided into the third branch and the fourth branch. The third branch is connected to the external large dialysate bag through the first clamp valve to ensure that the fluid replenishment process can proceed smoothly; the fourth branch is connected to the extracorporeal circulation system of the blood purification equipment through the first liquid pump to ensure that the dialysate can be accurately pumped from the dialysate pot into the extracorporeal circulation system when liquid needs to be transported. This design not only ensures that the flow of dialysate is more accurate and stable, but also realizes accurate flow measurement through real-time weighing monitoring and intelligent control.

[0026] The entire liquid input and output process is divided into two main operation scenarios. When the dialysate needs to be transported from the dialysate pot to the extracorporeal circulation system, the system first opens the first air valve to connect the upper port of the dialysate pot to the external air to form an air pressure balance. Next, the first liquid pump is started, and the dialysate is transported to the extracorporeal circulation system through the fourth branch. At the same time, the weighing sensor monitors the reduction in the weight of the liquid in the dialysate pot in real time to ensure that the amount of liquid transported is consistent with the preset treatment needs, thereby accurately controlling the input amount of the dialysate.

[0027] When the dialysate needs to be replenished, the system operation switches, closing the first air valve and opening the second air valve, the first air pump and the first pinch valve. At this time, the air pump pumps air into the upper port of the dialysate pot through the second branch, increasing the air pressure in the pot to form a positive pressure environment, pushing the liquid from the large dialysate bag into the dialysate pot through the third branch. The amount of liquid inflow during this process can also be accurately monitored by the weight change of the weighing sensor to ensure that the amount of fluid replenishment meets the design requirements and does not cause large measurement errors due to external factors.

[0028] Through the design of the above-mentioned gas pipelines and liquid pipelines, the present invention effectively solves the problem of insufficient accuracy of traditional large-capacity weight sensors. Due to the large design range, traditional large-range weight sensors often cannot meet the requirements of blood purification equipment for high-precision measurement of liquid flow, especially in the scenario of fine control of dialysate and replacement fluid. The lack of accuracy will directly affect the safety and effectiveness of treatment. In contrast, the present invention effectively divides the input and output of the dialysate and uses the smaller capacity of the dialysate pot for separate weighing, thereby controlling the weight change within the optimal range of the weighing sensor, significantly improving the measurement accuracy.

[0029] In addition, this design avoids the error accumulation problem caused by the use of multiple small-range weight sensors. In the prior art, although the accuracy of multiple small-range sensors is relatively high, the overall measurement accuracy is often seriously affected due to the error accumulation effect during the measurement process. In the present invention, the weight change of the dialysate pot is directly measured by a single weighing sensor, which fundamentally eliminates the error transmission problem between multiple sensors. In addition, the dialysate pot, the replacement fluid pot and the waste fluid pot are not connected to each other, and the flow and weight changes of each liquid do not interfere with each other, which realizes the independent measurement and precise control of different liquids, and further improves the stability and safety of the system.

[0030] In actual operation, for example, when the patient needs to be accurately delivered with dialysate, the system first opens the first air valve to connect the upper port of the dialysate pot to the outside world to ensure air pressure balance, and then starts the first liquid pump to deliver the dialysate from the dialysate pot to the extracorporeal circulation system. The weighing sensor monitors the weight change of the liquid pot in real time to ensure that the liquid delivery amount is accurate to the preset value, avoiding the adverse effects on the patient caused by flow control errors. When the liquid level in the dialysate pot drops to a certain level and the dialysate needs to be replenished from the external large dialysate bag, the system automatically completes the operation switch, closes the first air valve and the first liquid pump, and opens the second air valve, the first air pump and the first pinch valve. At this time, the air pump presses the liquid from the large dialysate bag into the dialysate pot by increasing the air pressure in the dialysate pot. This rehydration process is also monitored by the weighing sensor to ensure that the amount of liquid input meets the precise requirements.

[0031] Through the careful design of the entire liquid flow control, the present invention realizes independent control and accurate measurement of liquid flow. By using the combined operation of the air valve, air pump, liquid pump and pinch valve, liquid input and output can be flexibly managed to meet different treatment needs. In particular, the synergy of the air pump and the air valve avoids the pulsation phenomenon of the traditional liquid pump during the input process, making the liquid flow more stable and reliable.

[0032] Furthermore, the design of the gas pipeline at the upper port of the dialysate pot plays a balancing role through flexible air pressure regulation. In different operating modes, the combined action of the air pump and the air valve can adjust the air pressure state inside and outside the dialysate pot to prevent the instability caused by air pressure imbalance during the liquid flow process, thereby improving the measurement accuracy and operational reliability of the system. The flexibility and adaptability of this design not only effectively solves the problem of liquid flow control in traditional technology, but also greatly improves the operational flexibility and treatment safety of blood purification equipment.

[0033] In summary, the present invention realizes high-precision metering and flow control of dialysate through innovative dialysate pot pipeline design and precise control scheme, overcoming the problem of insufficient measurement caused by the accuracy limitation and error accumulation of weight sensors in the prior art. By utilizing the independent weighing, air pressure regulation and liquid flow control of the dialysate pot, the high precision and safety of the treatment process are effectively guaranteed, providing strong support for the reliable operation of blood purification equipment. This innovative design is not only suitable for dialysis treatment, but also has broad application prospects, and can play an important role in other medical and industrial scenarios involving precise control and measurement of liquids.

[0034] In one example, when the liquid pot structure contains a replacement fluid pot, the gas pipeline connected to the upper port of the replacement fluid pot is divided into a fifth branch and a sixth branch, the fifth branch is connected to the external air through a third air valve, and the sixth branch is connected to the external air through a second air pump and a fourth air valve in turn; the liquid pipeline connected to the lower port of the replacement fluid pot is divided into a seventh branch and an eighth branch, the seventh branch is connected to an external large replacement fluid bag through a second clamp valve, and the eighth branch is connected to the extracorporeal circulation system management of the blood purification equipment through a second liquid pump; wherein, the replacement fluid pot inputs liquid from the large replacement fluid bag into the replacement fluid pot through the combination of the second clamp valve, the fourth air valve and the second air pump, and inputs liquid from the replacement fluid pot to the extracorporeal circulation system pipeline of the blood purification equipment through the combination of the third air valve and the second liquid pump.

[0035] In this example, the gas and liquid pipelines of the replacement fluid jug are designed to achieve accurate input and output of the replacement fluid, thereby overcoming the problems of error accumulation and insufficient measurement accuracy in the prior art. The structural design of the replacement fluid jug ensures effective control of the replacement fluid through reasonable pipeline configuration to improve the accuracy and stability of fluid management in the blood purification device.

[0036] Specifically, the gas pipeline connected to the upper port of the replacement fluid pot is divided into the fifth branch and the sixth branch, which respectively meet the air pressure control requirements under different operating modes. The fifth branch is directly connected to the outside air through the third air valve to ensure that the replacement fluid pot can maintain air pressure balance with the external environment when necessary, thereby achieving smooth flow of liquid. The sixth branch is connected to the outside air through the second air pump and the fourth air valve. This design can provide appropriate air pressure regulation when the replacement fluid needs to be input or output, and use the air pump to increase or decrease the pressure inside the replacement fluid pot, thereby effectively controlling the flow direction and flow rate of the liquid.

[0037] The lower port of the replacement fluid pot is also connected to two liquid pipelines, namely the seventh branch and the eighth branch, to achieve the separation of liquid input and output. The seventh branch is connected to the external large replacement fluid bag through the second clamp valve, which is used to replenish the replacement fluid from the bag to the replacement fluid pot, while the eighth branch is connected to the extracorporeal circulation system pipeline of the blood purification equipment through the second liquid pump, which is used to deliver the liquid in the replacement fluid pot into the extracorporeal circulation system. This pipeline distribution method ensures that the input and output of the replacement fluid are independently controlled under different paths, avoiding the error accumulation and operation complexity caused by pipeline overlap in traditional technology.

[0038] During the specific operation, when it is necessary to replenish liquid from the large replacement fluid bag to the replacement fluid pot, the system will close the third air valve and open the fourth air valve, the second air pump and the second clamp valve. At this time, the second air pump pumps air into the replacement fluid pot through the sixth branch to form a positive pressure environment, thereby inputting the replacement fluid from the large replacement fluid bag into the replacement fluid pot through the seventh branch. During the entire fluid replenishment process, the pressure control in the replacement fluid pot makes the input liquid amount more accurate and avoids the input instability caused by gravity or changes in the external environment. In addition, the weighing sensor monitors the weight changes of the replacement fluid pot in real time to ensure that the input liquid amount meets the set requirements.

[0039] When the replacement fluid needs to be transported from the replacement fluid pot to the extracorporeal circulation system of the blood purification equipment, the operating logic changes. At this time, the system will close the fourth air valve and the second air pump, and open the third air valve and the second liquid pump at the same time. The opening of the third air valve connects the upper port of the replacement fluid pot to the outside air, so that the air pressure in the pot is balanced with the external environment, ensuring that the liquid can smoothly enter the extracorporeal circulation system from the replacement fluid pot through the eighth branch under the action of the second liquid pump. The entire process is monitored in real time by a weighing sensor to reduce the weight of the replacement fluid pot, ensuring that the amount of liquid delivered to the extracorporeal circulation system is accurately controlled.

[0040] Through this design, the present invention achieves high-precision flow control during the liquid input and output process, significantly improving the measurement accuracy and system stability. In the traditional method, although the use of multiple small-range sensors can improve the accuracy of a single measurement, their errors will be superimposed, resulting in less than ideal overall measurement accuracy. The present invention uses an independent weighing method for a single displacement fluid pot, combined with precise air pressure control and liquid pumping operations, to fundamentally eliminate the problem of insufficient accuracy caused by the accumulation of errors from multiple sensors.

[0041] At the same time, in the design, the replacement fluid pot is not connected to the dialysate pot and the waste fluid pot, ensuring that the flow of each liquid does not interfere with each other, achieving the purpose of independent measurement and control of different liquids. This independent design is of great significance for maintaining the stability and safety of the blood purification process, especially in complex treatment plans that require frequent adjustment of liquid flow and pressure, which can effectively reduce error accumulation and ensure accurate liquid management.

[0042] For example, during the actual treatment process, when the liquid in the replacement fluid pot needs to be replenished, the system will use the precise coordination of the air pump and the pinch valve to create a positive pressure environment to push the liquid from the large replacement fluid bag into the replacement fluid pot. This positive pressure input method can effectively overcome the problem of reduced flow caused by the drop in the liquid level in the large fluid bag, and at the same time ensure the accuracy of the input liquid volume through precise weight measurement. When it is necessary to provide replacement fluid to the extracorporeal circulation system, the balance between the air valve and the external air pressure, combined with the operation of the liquid pump, can achieve a stable output of the replacement fluid to meet the flow requirements of the extracorporeal circulation.

[0043] In addition, by setting up multiple independent gas pipelines, different air pressure operation modes can flexibly adapt to different treatment needs. When replenishing liquid, the air pump increases the air pressure in the pot, allowing the liquid to smoothly enter the replacement fluid pot; and when outputting liquid, the air valve is connected to the outside air, so that the replacement fluid can be pumped out under the state of air pressure balance, ensuring the stability and continuity of the entire liquid flow process. This design avoids the pulsation phenomenon that may occur when traditional liquid pumps directly suck liquids, and improves the stability of liquid flow.

[0044] In summary, the present invention solves the problems of insufficient liquid flow control accuracy and accumulated measurement errors in the prior art through the independent weighing design of the replacement fluid pot, precise air pressure control means and scientific liquid pipeline layout, and significantly improves the accuracy and efficiency of liquid management. This method of liquid segmentation and metering is suitable for replacement fluid management in blood purification equipment, and can also be extended to other medical and industrial fields that require high-precision fluid control, providing new ideas and technical support for the precise control of liquid management.

[0045] In one example, when the liquid pot structure contains a waste liquid pot, the gas pipeline connected to the upper port of the waste liquid pot is divided into a ninth branch and a tenth branch, the ninth branch is connected to the external air through the fifth air valve, and the tenth branch is connected to the external air through the third air pump and the sixth air valve in sequence; the liquid pipeline connected to the lower port of the replacement liquid pot is divided into an eleventh branch and a twelfth branch, the eleventh branch is connected to an external waste liquid storage bag through the third clamp valve, and the twelfth branch is connected to the extracorporeal circulation management system of the blood purification equipment through the third liquid pump; wherein, the waste liquid pot inputs liquid from the extracorporeal circulation system pipeline of the blood purification equipment into the waste liquid pot through the combination of the fifth air valve and the third liquid pump, and inputs liquid from the waste liquid pot into the waste liquid storage bag through the third air pump, the sixth air valve and the third clamp valve.

[0046] In this example, the design of the waste liquid pot achieves accurate management and treatment of waste liquid through the sophisticated configuration of gas and liquid pipelines, further solving the problems of errors and inaccurate control in the waste liquid collection process in blood purification equipment. The upper and lower ports of the waste liquid pot are each connected to different pipelines. The reasonable allocation of these pipelines enables the collection, storage and treatment of waste liquid to be carried out under high-precision control, effectively ensuring the stability and efficiency of the entire purification process.

[0047] The upper port of the waste liquid pot is connected to the ninth branch and the tenth branch, which are used for different gas control operations. The ninth branch is directly connected to the outside air through the fifth air valve to keep the waste liquid pot in air pressure balance with the outside world when necessary, ensuring that the liquid can flow smoothly. The tenth branch is connected to the outside air through the third air pump and the sixth air valve. This design can use the air pump to inject air into the waste liquid pot when necessary, and control the flow of waste liquid by adjusting the air pressure, so that the waste liquid can be smoothly discharged from the waste liquid pot to the waste liquid storage bag.

[0048] The lower port of the waste liquid pot is also connected to two liquid pipelines, the eleventh branch and the twelfth branch. The eleventh branch is connected to the external waste liquid storage bag through the third clamp valve, which is used to discharge the waste liquid into the storage bag for centralized treatment. The twelfth branch is connected to the extracorporeal circulation system of the blood purification equipment through the third liquid pump, which is used to extract the waste liquid from the extracorporeal circulation system into the waste liquid pot. Through the division of labor of these two liquid pipelines, the input and output of the waste liquid are independently and accurately controlled, thereby reducing the accumulation of errors in operation and ensuring the efficiency and reliability of waste liquid management.

[0049] During the waste liquid collection process, the system will first open the fifth air valve to ensure that the upper port of the waste liquid pot is connected to the outside air, so that the internal air pressure of the waste liquid pot is balanced with the outside. At the same time, the third liquid pump is activated to extract the waste liquid in the extracorporeal circulation system of the blood purification equipment into the waste liquid pot through the twelfth branch. In this process, the weight of the waste liquid pot is monitored in real time by the weighing sensor to ensure that the waste liquid collection process meets the preset quantity requirements. The setting of air pressure balance ensures that the liquid can enter the waste liquid pot at a stable speed and the flow control accuracy will not be affected by changes in internal pressure.

[0050] When the waste liquid in the waste liquid pot needs to be discharged, the system operation will change. At this time, the fifth air valve is closed, and the sixth air valve, the third air pump and the third clamp valve are opened. The third air pump injects air into the waste liquid pot through the tenth branch to form a positive pressure environment. This positive pressure pushes the waste liquid into the external waste liquid storage bag through the eleventh branch. During the entire waste liquid discharge process, the system can accurately control the flow rate of the waste liquid to ensure the discharge stability and efficiency of the liquid in the waste liquid pot, while avoiding the problem of liquid retention or poor discharge due to insufficient air pressure during the waste liquid storage process.

[0051] The advantage of this waste liquid pot design lies in its accuracy and independence in waste liquid management, which solves the multiple deficiencies in the waste liquid collection and treatment process in traditional blood purification equipment. First, by using the combination of the fifth air valve and the third air pump, the air pressure state inside the waste liquid pot can be flexibly controlled, thereby providing suitable air pressure conditions when collecting and discharging waste liquid, ensuring the smoothness of the entire waste liquid treatment process. Secondly, through the independent eleventh branch and the twelfth branch, the physical isolation of waste liquid input and output is achieved, avoiding cross-interference between pipelines, thereby reducing the possibility of errors and ensuring the accuracy of waste liquid management.

[0052] For example, during the treatment process, assuming that waste liquid needs to be extracted from the extracorporeal circulation system pipeline of the blood purification equipment, the system first opens the fifth air valve to connect the upper port of the waste liquid pot to the outside world, so that the internal air pressure of the waste liquid pot is balanced with the outside. Then, the third liquid pump starts to work and extracts the waste liquid into the waste liquid pot through the twelfth branch. During the waste liquid collection process, the weighing sensor monitors the weight change in the waste liquid pot in real time to ensure that the amount of waste liquid collected meets the design requirements and will not affect the effect of the entire purification process due to operational errors.

[0053] When the waste liquid in the waste liquid pot reaches the set liquid level, the system will start the waste liquid discharge operation. While closing the fifth air valve, open the sixth air valve, the third air pump and the third pinch valve, and inject air into the waste liquid pot through the third air pump to form positive pressure, so that the waste liquid is discharged to the external waste liquid storage bag through the eleventh branch. This positive pressure discharge method can effectively prevent the difficulty of waste liquid discharge caused by liquid level difference and insufficient pressure, ensure the timely discharge of waste liquid, and avoid the interference of residual waste liquid on the subsequent purification process.

[0054] In addition, the gas pipeline design at the upper port of the waste liquid pot also fully considers the air pressure requirements under different operating modes. By setting up two independent branches, it can flexibly switch between waste liquid collection and discharge. The fifth branch achieves air pressure balance by directly communicating with the outside world, while the tenth branch provides positive pressure assistance through a combination of an air pump and an air valve, thereby ensuring that the air pressure inside the waste liquid pot can always be effectively controlled under different operating conditions. This design not only improves the stability of the waste liquid flow, but also further improves the accuracy of waste liquid management by preventing flow fluctuations caused by air pressure imbalance.

[0055] In summary, the present invention realizes high-precision management and flow control of waste liquid through the independent design of the waste liquid pot and precise pipeline configuration, and solves the problem of inaccurate measurement caused by sensor errors and improper air pressure control in existing blood purification equipment. By utilizing the fifth air valve, the third air pump, the third clamp valve and an independent waste liquid pipeline system, the input and output of the waste liquid are optimized under different control modes, ensuring the efficiency and safety of the entire waste liquid treatment process. This innovative design method has significantly helped to improve the performance of blood purification equipment, not only improving the reliability of equipment operation, but also ensuring the safety and effectiveness of patient treatment.

[0056] In one example, a first liquid level detector and a second liquid level detector are provided on any one of the liquid pots in the liquid pot structure, wherein the first liquid level detector is arranged in the upper area of ​​the liquid pot, and is used to send a first prompt message when it is detected that the liquid level in the liquid pot is located in the upper area, and the second liquid level detector is arranged in the lower area of ​​the liquid pot, and is used to send a second prompt message when it is detected that the liquid level in the liquid pot is located in the lower area.

[0057] In this example, each of the liquid jugs in the liquid jug structure is equipped with two liquid level detectors, the first liquid level detector and the second liquid level detector, which are installed in the upper and lower areas of the liquid jug, respectively. This design enables real-time monitoring and control of the liquid level, thereby improving the accuracy and safety of liquid management, which is particularly important in complex blood purification or other industrial processes where refined management of liquid input and output is required.

[0058] First, the first liquid level detector is located in the upper area of ​​the liquid pot. Its main function is to send a prompt message when the liquid reaches or approaches the upper limit of the liquid pot. Its role is to monitor the height of the liquid in real time to ensure that the liquid pot is not overfilled. By setting the threshold of the liquid level detection, when the liquid level reaches the height of the upper area, the first liquid level detector will send a first prompt message to the system control unit that the liquid in the liquid pot is close to the maximum capacity. This can effectively prevent the liquid from overflowing due to overfilling of the liquid pot, thereby protecting the normal operation of the entire equipment and reducing the risk of liquid loss or equipment failure caused by overflow.

[0059] In applications such as blood purification equipment, the flow management of dialysate, replacement fluid or waste fluid requires very high precision to ensure the safety and effectiveness of treatment. For example, during the process of replenishing dialysate or replacement fluid, if the liquid exceeds the maximum capacity of the liquid pot, it may cause liquid leakage or abnormal pressure of the equipment, affecting the stability of the entire blood purification process. Through the liquid level detector in the upper area, the system can issue an alarm or automatically take measures to stop the replenishment before the liquid level reaches the critical point, ensuring that the capacity of the liquid pot is strictly controlled.

[0060] Secondly, the second liquid level detector is installed in the lower area of ​​the liquid pot. Its function is to send a second prompt message when the liquid level drops to near the lower limit, so as to remind the system that the liquid in the current liquid pot is close to the minimum level. This design is also crucial for the accuracy of liquid management. The second liquid level detector can prevent the liquid in the liquid pot from being completely exhausted, causing air to enter the pipeline. In blood purification equipment, if air enters the pipeline, it will cause abnormal operation of the equipment and even interrupt treatment, posing a potential danger to the patient. Therefore, through the liquid level detector in the lower area, the system can issue a prompt in time when the liquid level drops to near empty, prompting the system to take rehydration or other necessary measures to ensure the continuity of liquid supply.

[0061] At the same time, the second liquid level detector can also play an important role when the liquid in the waste liquid pot is close to the lower limit. For example, during the waste liquid discharge process, if the waste liquid pot is close to empty and the system is still trying to discharge more waste liquid, this may cause the pump to run dry and damage the equipment. Therefore, through the lower liquid level detector, the system can automatically stop the waste liquid discharge operation to avoid equipment damage and unstable operation.

[0062] The combined use of these liquid level detectors enables comprehensive monitoring of the liquid status, ensuring that the system can operate accurately in terms of liquid input, output and storage, and maintaining efficient and safe operation. Dual liquid level detection also makes the entire liquid management process more flexible and reliable. For example, in the dialysate pot, when the first liquid level detector sends a prompt message, the system can automatically stop inputting liquid from the large dialysate bag to keep the liquid level within a safe range. When the second liquid level detector indicates that the liquid level is too low, the system can start the refilling program to ensure that the liquid supply is not interrupted.

[0063] Through the configuration of dual liquid level detectors, the system can achieve intelligent liquid management, which not only improves the overall accuracy, but also reduces the dependence on operators and the possibility of human operational errors. In some application scenarios, such as automatic operation at night or remote operation, the prompt information of the liquid level detector can be transmitted to the operator through the remote transmission module, or automatically trigger the control system to make corresponding operational adjustments to ensure the continuous operation of the entire system. In addition, the design of dual liquid level detection is also highly adaptable and can be applied to different types of liquid pots. Whether it is used for the storage of dialysate, replacement fluid or waste fluid, it can be accurately managed through the liquid level detector. This makes the system highly flexible and versatile when handling different types of liquids.

[0064] In summary, the dual liquid level detectors in the present invention - the first liquid level detector in the upper area and the second liquid level detector in the lower area, are responsible for monitoring the upper and lower limits of the liquid, respectively, and sending corresponding prompt information. This design effectively improves the accuracy of liquid management and the safety of the system. In applications such as blood purification that require precise liquid control, the liquid level detector provides real-time monitoring capabilities to prevent equipment problems and potential risks caused by excessive filling or complete depletion of liquid, and ensure the stability and continuity of the liquid input and output process. Through precise liquid level control, the system can improve the effectiveness of treatment while reducing human operational errors and equipment operation risks, providing patients with a safer treatment experience.

[0065] Reference Figure 2 The embodiment of the present invention further provides a liquid segmentation and metering method based on a blood purification device, and the liquid segmentation and metering method based on a blood purification device is applied to the liquid segmentation and metering device based on a blood purification device described in the above embodiment, wherein the liquid segmentation and metering method includes: S1, controlling the gas pipeline connected to the upper port of the liquid kettle to extract gas from the liquid kettle, and controlling the liquid pipeline connected to the lower port of the liquid kettle to be in a connected state with the external liquid bag, and inputting the liquid in the external liquid bag into the liquid kettle based on the pressure value in the liquid kettle, until the liquid level in the liquid kettle is out of the upper area of ​​the liquid kettle; S2, recording a first weight value marked by the weighing sensor and a timestamp corresponding to the first weight value.

[0066] S3, controlling the gas pipeline connected to the upper port of the liquid kettle to be in a connected state with the external air, and controlling the liquid pipeline connected to the lower port of the liquid kettle to be connected with the extracorporeal circulation system pipeline of the blood purification equipment, so that the extracorporeal circulation system pipeline of the blood purification equipment obtains liquid from the liquid kettle.

[0067] S4, recording a second weight value marked by the weighing sensor and a timestamp corresponding to the second weight value.

[0068] S5. Calculate the flow rate and flow rate of the liquid corresponding to the liquid pot based on the first weight value and the timestamp corresponding to the first weight value, and the second weight value and the timestamp corresponding to the second weight value, wherein the liquid pot is a dialysis fluid pot or a replacement fluid pot.

[0069] That is, the system will extract gas from the inside of the liquid kettle by controlling the gas pipeline connected to the upper port of the liquid kettle, so that a negative pressure environment is formed inside the liquid kettle. The purpose of this step is to reduce the pressure inside the liquid kettle so that the liquid in the external liquid bag can naturally flow into the liquid kettle under the action of the pressure difference. At the same time, by controlling the liquid pipeline connected to the lower port of the liquid kettle to connect it with the external liquid bag, the liquid can flow into the liquid kettle. The liquid input process will continue until the liquid level inside the liquid kettle reaches the position of its upper area, at which time the liquid input will be stopped. Through this negative pressure control method, the liquid can enter the liquid kettle smoothly and in a controlled manner, avoiding the occurrence of unstable flow due to insufficient external pressure or fluctuations during the input process.

[0070] Then, after the liquid is input, the system records the weight of the liquid pot through the weighing sensor. At this time, the first weight value marked by the weighing sensor and the corresponding timestamp will be stored, which is crucial for the subsequent flow rate and flow calculation. The real-time data provided by the weighing sensor can accurately reflect the weight change of the liquid in the liquid pot, providing a basis for subsequent flow control and calculation.

[0071] When the liquid needs to be output, the system will control the upper port of the liquid pot to communicate with the outside air, so that the air pressure inside the liquid pot is restored to a state consistent with the external environment. The air pressure balance at this time ensures that the liquid can be extracted at a steady speed during the output process without causing unstable liquid flow due to air pressure differences. At the same time, the liquid pipeline connected to the lower port of the liquid pot is connected to the extracorporeal circulation system of the blood purification equipment, so that the extracorporeal circulation system can obtain the required liquid from the liquid pot. In this process, the output of the liquid is achieved through the control of the liquid pump, ensuring the accuracy and stability of the output. During the liquid output process, the balance of air pressure plays a key role, avoiding fluctuations in liquid flow caused by unstable air pressure.

[0072] As the liquid is drawn out of the pot, the weighing sensor will monitor the weight of the pot again and record the weight value of the pot at this time and its timestamp. This second weight value is also very critical. It represents the remaining weight of the liquid after it is drawn out of the pot. By comparing it with the data of the first weighing, the consumption of the liquid can be obtained. At the same time, the corresponding timestamp also provides the time period when the liquid is drawn, which provides a time basis for the calculation of the flow rate.

[0073] By comparing the above two weight values ​​and the difference between the corresponding timestamps, the system can calculate the flow rate and flow rate of the liquid. Specifically, the first weight value minus the second weight value is the total amount of liquid extracted from the liquid pot, and the difference in timestamps is the time period during which the liquid is extracted. From these two data, the system can calculate the average flow rate of the liquid and the flow rate within a specified time. This calculation method ensures high-precision control of the liquid flow, especially in extremely demanding medical applications such as blood purification. This accuracy is crucial to the treatment effect and safety of patients.

[0074] This liquid segmentation and metering method is particularly suitable for the management of dialysate jugs and replacement fluid jugs. In practical applications, by precisely controlling the input and output of liquids, the flow control of dialysate or replacement fluid can be well achieved, ensuring that the liquid supply and treatment at each stage meet the design standards. In blood purification treatment, the supply of dialysate and the treatment of replacement fluid directly affect the treatment effect and patient safety. Through this method, the system can monitor and adjust the flow rate and flow of the liquid in real time to ensure the smoothness and accuracy of the entire process.

[0075] For example, when the system needs to deliver a certain amount of dialysate to a patient, the weight of the liquid in the pot is first recorded by a weighing sensor, and the liquid level is ensured to reach an appropriate height. The input flow is balanced by air pressure control to avoid overfilling or insufficient supply. Then, when the liquid enters the extracorporeal circulation system through the liquid pipeline, the system accurately measures the amount of liquid extracted by weighing it again. In this way, the entire liquid supply process not only has precise hardware control, but also reliable data recording and calculation, ensuring the accuracy of the liquid supply.

[0076] This liquid segmentation and metering method has many advantages over traditional methods. First, by segmenting the input and output of the liquid and using the pressure control and liquid level monitoring in the liquid pot, the system can more finely control the flow process of the liquid. Traditional liquid management methods often rely on simple weight sensors or liquid level monitoring, which cannot achieve precise control of each stage. This method combines weighing sensors with air pressure regulation, which not only realizes the automation of liquid management, but also significantly improves the accuracy of flow control.

[0077] In addition, the weight record of the weighing sensor during each input and output process provides accurate data support for subsequent liquid management. Compared with the direct measurement method through the flow meter, the use of weighing sensors avoids measurement errors caused by liquid pulsation or bubbles, making the calculation of flow rate and flow more reliable. In medical applications, especially in blood purification equipment, any flow error may affect the treatment effect, so calculating the flow of liquid by weighing can significantly improve the safety and controllability of the entire process.

[0078] In general, this liquid segmentation and metering method based on blood purification equipment achieves accurate management of dialysate or replacement fluid through precise control of the liquid inside the liquid pot and real-time monitoring of the weighing sensor, effectively solving the error problem caused by insufficient weight sensor accuracy or imperfect measurement methods in traditional liquid management. Through a series of logically reasonable control steps, the system ensures that the input and output of liquid in each link are stable and controlled, providing patients with safer and more effective treatment methods, while also greatly improving the operating efficiency and reliability of the equipment.

[0079] Reference Figure 3 The embodiment of the present invention further provides a liquid segmentation and metering method based on a blood purification device, and the liquid segmentation and metering method based on a blood purification device is applied to the liquid segmentation and metering device based on a blood purification device described in the above embodiment, wherein the liquid segmentation and metering method includes: S6, controlling the gas pipeline connected to the upper port of the first liquid kettle to extract gas from the first liquid kettle, and controlling the liquid pipeline connected to the lower port of the first liquid kettle to be connected to the first external liquid bag, and inputting the liquid in the first external liquid bag into the first liquid kettle based on the pressure value in the first liquid kettle until the liquid level in the first liquid kettle is in the upper area of ​​the first liquid kettle, wherein the first liquid kettle is a dialysis fluid kettle or a replacement fluid kettle.

[0080] S7, controlling the gas pipeline connected to the upper port of the second liquid pot to pump gas into the second liquid pot, and controlling the liquid pipeline connected to the lower port of the second liquid pot to be in a connected state with the second external liquid bag, and inputting the liquid in the second external liquid bag into the second external liquid bag based on the pressure value of the content of the second liquid pot, until the liquid level inside the second liquid pot is in the lower area of ​​the second liquid pot, wherein the second liquid pot is a waste liquid pot; S8, recording a third weight value marked by the weighing sensor and a timestamp corresponding to the third weight value; S9, controlling the gas pipeline connected to the upper port of the first liquid kettle to be in communication with the external air, and controlling the liquid pipeline connected to the lower port of the first liquid kettle to be in communication with the extracorporeal circulation system pipeline of the blood purification device, so as to input liquid into the extracorporeal circulation system pipeline of the blood purification device; S10, controlling the gas pipeline of the upper port of the second liquid kettle to be in a connected state with the external air, and controlling the liquid pipeline connected to the lower port of the second liquid kettle to be in a connected state with the extracorporeal circulation system pipeline of the blood purification device, so that the extracorporeal circulation system pipeline of the blood purification device inputs liquid into the second liquid kettle; S11, recording a fourth weight value marked by the weighing sensor and a timestamp corresponding to the fourth weight value; S12, calculating the dehydration amount and dehydration flow rate of the blood purification device based on the third weight value and the timestamp corresponding to the third weight value, and the fourth weight value and the timestamp corresponding to the fourth weight value.

[0081] That is, in order to add liquid to the first liquid kettle, the system controls the gas pipeline connected to the upper port of the first liquid kettle so that the gas in the liquid kettle is extracted, thereby forming a negative pressure state inside the liquid kettle. The purpose of this negative pressure is to make it easier to introduce liquid into the first liquid kettle from the first external liquid bag in the following operation. At the same time, the system controls the lower port of the first liquid kettle to be connected to the liquid pipeline of the first external liquid bag. Based on the negative pressure state formed inside the first liquid kettle, the liquid flows from the external liquid bag into the first liquid kettle until the liquid level rises to the upper area of ​​the first liquid kettle. At this time, the liquid in the first liquid kettle is precisely controlled to a safe maximum liquid level to ensure that a stable and appropriate liquid supply can be provided in subsequent operations. This step can be applied to a dialysate kettle or a replacement fluid kettle to manage the replenishment of dialysate or replacement fluid.

[0082] At the same time, the liquid handling operation of the second liquid pot is also carried out synchronously, but the process is slightly different because the second liquid pot is used to collect waste liquid. During operation, the system controls the gas pipeline connected to the upper port of the second liquid pot to pump gas into the second liquid pot. In this process, an air pump is used to transport air into the second liquid pot, thereby increasing the pressure inside it and forming a positive pressure environment. Under the action of this pressure, the liquid in the liquid pot can be discharged smoothly. At the same time, the system controls the liquid pipeline connected to the lower port of the second liquid pot to be connected to the second external liquid bag, and uses positive pressure to input the waste liquid from the second liquid pot to the second external liquid bag until the liquid level in the second liquid pot drops to the lower area. This method achieves effective management of waste liquid through air pressure regulation, ensuring that waste liquid can be discharged from the second liquid pot in a timely and safe manner.

[0083] After completing the liquid operation of the first liquid pot and the second liquid pot, the system records the third weight value and the corresponding timestamp through the weighing sensor. This weight value represents the weight change of the first liquid pot and the second liquid pot after completing the liquid replenishment and discharge, and the timestamp is used for the subsequent calculation of flow rate and flow rate. During the further operation of the liquid, the system will allow the liquid in the first liquid pot to flow into the extracorporeal circulation system to support blood purification. To this end, the system controls the upper port of the first liquid pot to communicate with the outside air so that the air pressure in the liquid pot is balanced with the outside, thereby ensuring that the liquid can be smoothly output. At the same time, the lower port of the first liquid pot is connected to the extracorporeal circulation system pipeline. Through this setting, the liquid can be pumped into the extracorporeal circulation system of the blood purification equipment under an air pressure balance environment. The operation in this process is precisely controlled to avoid fluctuations in liquid flow and instability in flow.

[0084] For the second liquid pot, the operating logic of the system is to enable it to receive waste liquid from the extracorporeal circulation system. By controlling the gas pipeline at the upper port of the second liquid pot to communicate with the external air, the air pressure inside the liquid pot is balanced with the external environment, ensuring that the liquid can smoothly enter the second liquid pot. At the same time, the lower port of the second liquid pot is connected to the extracorporeal circulation system pipeline, so that the waste liquid can be effectively introduced into the second liquid pot. Such operation can ensure that the waste liquid collection process is smooth and correct.

[0085] In the process of the liquid flowing from the first liquid pot to the second liquid pot, the system again records the fourth weight value and its corresponding timestamp through the weighing sensor. This fourth weight value reflects the weight change of the liquid pot after the liquid flows. Similarly, the timestamp records the time process of the entire operation. Based on the third and fourth weight values, as well as the corresponding timestamps, the system can accurately calculate the flow rate and flow velocity of the liquid.

[0086] In particular, these weight data play a key role in calculating the dehydration amount and dehydration flow. By calculating the difference between the third weight value and the fourth weight value, the system can obtain the total dehydration amount of the dialysate or replacement fluid, and calculate the average dehydration rate of the total dehydration amount based on the difference between the timestamps. These data are crucial for monitoring and controlling the blood purification process. Accurate dehydration volume control can effectively prevent fluid imbalance problems, while accurate dehydration flow control can ensure the smooth flow of fluid during treatment, providing patients with more effective and safe treatment.

[0087] The whole method successfully realizes the refined operation of liquid input, output and flow management in the blood purification equipment through a series of precise control and data recording steps. The system controls the flow of gas and liquid, so that the liquid can flow stably between the first liquid pot, the second liquid pot and the external liquid bag. The real-time data recording and analysis of the weighing sensor ensures accurate monitoring of the flow rate, flow velocity and dehydration amount. This innovative method solves the error problem caused by the insufficient accuracy of the weight sensor or poor control of the liquid flow in the traditional liquid management process, and significantly improves the accuracy of liquid management in the entire blood purification process.

[0088] Especially for dialysis and waste management, precise dehydration and flow control can effectively improve treatment effects and reduce treatment risks for patients. During the entire operation, the air pressure regulation inside the fluid pot plays a very important role. Through different pressure changes, effective control of liquid input and output can be achieved. Whether it is using a negative pressure environment when replenishing the dialysate, or using positive pressure to push during the waste discharge process, the system can flexibly adjust operations to adapt to different fluid management needs.

[0089] In addition, the system records the weighing and time stamp of each operation stage, ensuring that each liquid operation has corresponding weight and time data support, providing a solid foundation for subsequent flow calculation. These data can be used for real-time liquid flow rate and flow control, and can also be used as a reference for subsequent system performance analysis and optimization to improve the efficiency and reliability of equipment operation.

[0090] In general, the liquid segmentation and metering method provided by the present invention realizes efficient management of dialysate and waste liquid through precise air pressure control, reasonable liquid pipeline design, and data monitoring and flow calculation of weighing sensors, providing a strong technical guarantee for the stable operation of blood purification equipment. This innovative method ensures that the flow of liquid in each link is controlled and accurate, avoids the treatment risks caused by improper liquid management, and improves the safety and effectiveness of the entire treatment process.

[0091] Reference Figure 4 In an embodiment of the present invention, a computer device is also provided. The computer device may be a server, and its internal structure may be as follows: Figure 4As shown. The computer device includes a processor, a memory, a display screen, an input device, a network interface and a database connected through a system bus. Among them, the processor designed by the computer is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the corresponding data in this embodiment. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, the above method is implemented.

[0092] Those skilled in the art will understand that Figure 4 The structure shown in the figure is merely a block diagram of a portion of the structure related to the solution of the present invention, and does not constitute a limitation on the computer device to which the solution of the present invention is applied.

[0093] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the above method is implemented. It can be understood that the computer-readable storage medium in this embodiment can be a volatile readable storage medium or a non-volatile readable storage medium.

[0094] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media provided by the present invention and used in the embodiments may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double-speed data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM.

[0095] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, device, article or method including the element.

[0096] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liquid splitting and metering device based on a blood purification device, characterized in that: The liquid dividing and metering device comprises: A liquid pot structure, comprising at least one liquid pot, any one of which is provided with an upper and lower port, the upper port being connected to a gas pipeline for inputting or outputting gas, and the lower port being connected to a liquid pipeline for inputting or outputting gas, wherein when there are multiple liquid pots, the liquid pots are not connected to each other; A weighing sensor supports at least one of the liquid jugs in the liquid jug structure and is used to measure the total weight of the at least one liquid jug in real time.

2. The liquid dividing and measuring device according to claim 1, characterized in that: When the liquid bottle structure contains a dialysate bottle, The gas pipeline connected to the upper port of the dialysate pot is divided into a first branch and a second branch, the first branch is connected to the external air through a first air valve, and the second branch is connected to the external air through a first air pump and a second air valve in sequence; The liquid pipeline connected to the lower port of the dialysate pot is divided into a third branch and a fourth branch, the third branch is connected to the external dialysate large liquid bag through the first pinch valve, and the fourth branch is connected to the extracorporeal circulation system pipeline of the blood purification device through the first liquid pump; Among them, the dialysate pot inputs liquid from the large dialysate bag into the dialysate pot through the combined use of the first clamp valve, the second air valve and the first air pump, and inputs liquid from the dialysate pot to the extracorporeal circulation system pipeline of the blood purification equipment through the combined use of the first air valve and the first liquid pump.

3. The liquid dividing and measuring device according to claim 1, characterized in that: In the case where the liquid pot structure includes a replacement liquid pot, The gas pipeline connected to the upper port of the displacement fluid pot is divided into a fifth branch and a sixth branch, the fifth branch is connected to the external air through the third air valve, and the sixth branch is connected to the external air through the second air pump and the fourth air valve in sequence; The liquid pipeline connected to the lower port of the replacement fluid pot is divided into a seventh branch and an eighth branch, the seventh branch is connected to an external large replacement fluid bag through a second pinch valve, and the eighth branch is connected to the extracorporeal circulation system pipeline of the blood purification device through a second liquid pump; Among them, the replacement fluid pot inputs liquid from the large replacement fluid bag into the replacement fluid pot through the combined use of the second clamp valve, the fourth air valve and the second air pump, and inputs liquid from the replacement fluid pot to the extracorporeal circulation system pipeline of the blood purification equipment through the combined use of the third air valve and the second liquid pump.

4. The liquid dividing and measuring device according to claim 3, characterized in that: In the case where the liquid pot structure includes a waste liquid pot, The gas pipeline connected to the upper port of the waste liquid pot is divided into a ninth branch and a tenth branch, the ninth branch is connected to the external air through the fifth air valve, and the tenth branch is connected to the external air through the third air pump and the sixth air valve in sequence; The liquid pipeline connected to the lower port of the replacement fluid pot is divided into an eleventh branch and a twelfth branch, the eleventh branch is connected to an external waste liquid storage bag through a third pinch valve, and the twelfth branch is connected to the extracorporeal circulation management system of the blood purification device through a third liquid pump; Among them, the waste liquid pot inputs liquid from the extracorporeal circulation system pipeline of the blood purification equipment into the waste liquid pot through the combined use of the fifth air valve and the third liquid pump, and inputs liquid from the waste liquid pot into the waste liquid storage liquid bag through the third air pump, the sixth air valve and the third clamping valve.

5. The liquid dividing and measuring device according to claim 4, characterized in that: Any one of the liquid pots in the liquid pot structure is provided with a first liquid level detector and a second liquid level detector, wherein the first liquid level detector is arranged in the upper area of ​​the liquid pot, and is used to send a first prompt message when it is detected that the liquid level in the liquid pot is located in the upper area, and the second liquid level detector is arranged in the lower area of ​​the liquid pot, and is used to send a second prompt message when it is detected that the liquid level in the liquid pot is located in the lower area.

6. A liquid segmentation and metering method based on a blood purification device, characterized in that: The liquid segmentation and metering method based on the blood purification device is applied to the liquid segmentation and metering device based on the blood purification device according to any one of claims 1 to 5, wherein the liquid segmentation and metering method comprises: Controlling the gas pipeline connected to the upper port of the liquid kettle to extract gas from the liquid kettle, and controlling the liquid pipeline connected to the lower port of the liquid kettle to be in a connected state with the external liquid bag, and inputting the liquid in the external liquid bag into the liquid kettle based on the pressure value in the liquid kettle, until the liquid level in the liquid kettle is out of the upper area of ​​the liquid kettle; Recording a first weight value marked by the weighing sensor and a timestamp corresponding to the first weight value; Controlling the gas pipeline connected to the upper port of the liquid kettle to be in a connected state with the external air, and controlling the liquid pipeline connected to the lower port of the liquid kettle to be in a connected state with the extracorporeal circulation system pipeline of the blood purification device, so that the extracorporeal circulation system pipeline of the blood purification device obtains liquid from the liquid kettle; Recording a second weight value marked by the weighing sensor and a timestamp corresponding to the second weight value; Based on the first weight value and the timestamp corresponding to the first weight value, and the second weight value and the timestamp corresponding to the second weight value, the flow rate and flow rate of the liquid corresponding to the liquid pot are calculated, wherein the liquid pot is a dialysis fluid pot or a replacement fluid pot.

7. The liquid segmentation and metering method based on the blood purification device according to claim 6, characterized in that: Liquid splitting and metering methods include: Controlling the gas pipeline connected to the upper port of the first liquid kettle to extract gas from the first liquid kettle, and controlling the liquid pipeline connected to the lower port of the first liquid kettle to be in a connected state with the first external liquid bag, and inputting the liquid in the first external liquid bag into the first liquid kettle based on the pressure value in the first liquid kettle until the liquid level in the first liquid kettle is in the upper area of ​​the first liquid kettle, wherein the first liquid kettle is a dialysate kettle or a replacement fluid kettle; Controlling the gas pipeline connected to the upper port of the second liquid pot to pump gas into the second liquid pot, and controlling the liquid pipeline connected to the lower port of the second liquid pot to be in a connected state with the second external liquid bag, and inputting the liquid in the second external liquid bag into the second external liquid bag based on the pressure value of the content of the second liquid pot, until the liquid level inside the second liquid pot is in the lower area of ​​the second liquid pot, wherein the second liquid pot is a waste liquid pot; Recording a third weight value marked by the weighing sensor and a timestamp corresponding to the third weight value; Controlling the gas pipeline connected to the upper port of the first liquid pot to be in communication with the external air, and controlling the liquid pipeline connected to the lower port of the first liquid pot to be in communication with the extracorporeal circulation system pipeline of the blood purification device, so as to input liquid into the extracorporeal circulation system pipeline of the blood purification device; Controlling the gas pipeline of the upper port of the second liquid pot to be in a connected state with the external air, and controlling the liquid pipeline connected to the lower port of the second liquid pot to be in a connected state with the extracorporeal circulation system pipeline of the blood purification device, so that the extracorporeal circulation system pipeline of the blood purification device can input liquid into the second liquid pot; Recording a fourth weight value marked by the weighing sensor and a timestamp corresponding to the fourth weight value; Based on the third weight value and the timestamp corresponding to the third weight value, and the fourth weight value and the timestamp corresponding to the fourth weight value, the dehydration amount and the dehydration flow rate of the blood purification device are calculated.

8. A computer device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein: When the processor executes the computer program, the steps of the method according to claim 6 or 7 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to claim 6 or 7 are implemented.

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