Hyperpure liquid supply system for hemodialysis

Abstract

The utility model discloses a hemodialysis ultrapure liquid supply system which comprises a liquid preparation tank and a liquid storage tank, a pneumatic water inlet valve is connected to one side of the liquid preparation tank through a pipeline, a circulating pump is installed between the liquid preparation tank and the liquid storage tank, a pneumatic circulating valve is installed at one end of the liquid preparation tank, and a liquid preparation valve assembly is installed at the other end of the liquid preparation tank. A disinfection assembly, a filtering assembly and a waste discharge assembly are sequentially connected between the circulating pump and the liquid storage tank, a liquid return assembly is installed on one side of the liquid storage tank and comprises a first manual liquid return valve and a second manual liquid return valve which are connected through a pipeline, and a liquid feeding assembly used for being connected into a ward is installed on the side, located on the waste discharge assembly, of the liquid storage tank. The utility model provides a hemodialysis ultra-pure liquid supply system which is composed of a liquid preparation system, a disinfection system, a cleaning system and the like, a complete closed system from liquid preparation, liquid supply to disinfection is formed, AB concentrated liquid supply of a blood purification center can be sufficient, and supply requirements of personalized dialysate can be met. The device is suitable for preparation and supply of ultra-pure dialysis concentrated liquid required by hemodialysis.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a hemodialysis ultrapure liquid supply system. Background Art

[0002] Due to the continuous development of the dialysis industry and the expansion of the scale of hemodialysis, a dialysis center now receives 100 dialysis patients at a time. The traditional way is to manually transport the dialysis fluid. One device requires two barrels of dialysis concentrate, A / B, and the dialysis fluid needs to be replaced during use. This method not only makes it impossible to control the quality of the original liquid, but also increases the risk of contamination. Secondly, the existing centralized liquid supply system is prone to seepage and leakage, the liquid preparation is not accurate enough, the liquid preparation accuracy is unstable, and the prepared liquid is prone to imbalance. In more serious cases, it will cause the hemodialysis machine to alarm and shut down, endangering life. Secondly, the delivery pressure is difficult to control. In the case of a large dialysis center with many beds, it is difficult to achieve balanced liquid supply. Finally, the equipment liquid supply pipeline is easy to be contaminated, especially the disinfection process is complicated and difficult to clean, and there is residue. Even if it is emptied, compressed air is required, and it is difficult to ensure that the compressed air is clean. Although many manufacturers' systems have automatic disinfection functions, the disinfection effect is extremely poor and the duration is not sufficient. Extra-long pipelines are difficult to clean and there is a risk of residual disinfectant. However, when using thermal disinfection, the pipe is too long, the water temperature loses a lot when reaching the end, the end cannot reach the disinfection temperature, and the thermal disinfection is not thorough enough. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides an ultrapure liquid supply system for hemodialysis, which is composed of a liquid preparation system, a disinfection system, a cleaning system, and other systems, forming a complete closed system from liquid preparation, liquid supply to disinfection, which can meet the supply needs of AB concentrated liquid and personalized dialysate in the blood purification center, and is suitable for the preparation and supply of ultrapure dialysis concentrated liquid required for hemodialysis.

[0004] To achieve the above-mentioned purpose, a hemodialysis ultrapure liquid supply system includes a liquid preparation tank and a liquid storage tank, a pneumatic water inlet valve is connected to a pipeline on one side of the liquid preparation tank, a circulating pump is installed between the liquid preparation tank and the liquid storage tank, a pneumatic circulating valve is installed at one end of the liquid preparation tank and the pipeline is connected to the circulating pump, a liquid preparation valve assembly is installed at the other end of the liquid preparation tank and is also connected to the circulating pump through a pipeline, a disinfection assembly, a filtration assembly and a waste discharge assembly are connected in sequence between the circulating pump and the liquid storage tank, a liquid return assembly is installed on one side of the liquid storage tank, the liquid return assembly includes a first manual liquid return valve and a second manual liquid return valve connected by two pipelines, and a liquid delivery assembly for connecting to a ward is installed on the liquid storage tank at one side of the waste discharge assembly.

[0005] Preferably, a powder feeding bin is installed on the liquid preparation tank, a powder feeding motor is installed at the bottom of the powder feeding bin, and a pneumatic stirring device for stirring the powder in the liquid preparation tank is installed on one side of the powder feeding motor. The pneumatic stirring device includes a pneumatic motor and a stirring paddle, and the pneumatic motor is installed on the liquid preparation tank, and the stirring paddle is hinged to the pneumatic motor and extends inside the liquid preparation tank.

[0006] Preferably, the liquid preparation tank is provided with an automatic conductivity detection device, and an automatic pH value detection device is also provided on one side of the automatic conductivity detection device.

[0007] Preferably, the liquid dispensing valve assembly includes a manual liquid dispensing valve and a pneumatic liquid dispensing valve, one end of the manual liquid dispensing valve is connected to the bottom of the liquid dispensing tank through a pipeline, one end of the pneumatic liquid dispensing valve is connected to the manual liquid dispensing valve through a pipeline, and the other end is hinged to the circulation pump.

[0008] Preferably, the waste discharge assembly includes a waste discharge solenoid valve, a liquid storage tank pneumatic valve and a liquid storage tank manual valve which are connected together in sequence through pipelines, one end of the waste discharge solenoid valve is connected to the pneumatic liquid distribution valve, one end of the liquid tank manual valve is connected to the bottom of the liquid storage tank, and a sewage outlet is extended from one side of the waste discharge solenoid valve.

[0009] Preferably, the filter assembly includes a first pneumatic liquid delivery valve, a manual exhaust valve, a first filter, a second filter and an endotoxin filter which are connected together in sequence through pipelines, one end of the first pneumatic liquid delivery valve is connected to a circulation pump, and one end of the endotoxin filter is connected to one end of a liquid storage tank through a pipeline.

[0010] Preferably, the disinfection assembly includes a disinfection valve and a heater connected together in sequence through pipelines, one end of the disinfection valve is connected to a circulation pump through a pipeline, one end of the heater is connected to a liquid storage tank through a pipeline, and a pressure detection gauge is installed between the disinfection valve and the heater.

[0011] Preferably, the liquid delivery component includes two groups of manual liquid delivery valves, a liquid delivery pump, a second liquid delivery valve, a pressure display gauge and a temperature display gauge, which are symmetrically arranged and respectively connected together through pipelines. A purge port is also arranged between the second liquid delivery valve and the pressure gauge.

[0012] Preferably, a liquid level display screen is installed on the liquid preparation tank.

[0013] The beneficial effects of the utility model are:

[0014] 1. Automatic liquid preparation; first put the hemodialysis concentrated powder into the powder storage bin (can accommodate 30-130 portions of dialysis powder). The powder storage bin has upper and lower limit reminder alarm functions (the number of powder portions cannot be lower than or higher than the set range value). B main control screen → liquid preparation mode → liquid preparation start → input the number of liquid portions to be prepared on the day → confirm prompt box → liquid preparation start → confirm prompt box → system automatic operation → automatic water inlet → automatic tank washing → automatic waste discharge → automatic liquid preparation water inlet → automatic dynamic voltage stabilization monitoring → automatic heating → automatic stirring → automatic pH value detection → automatic conductivity detection → automatic liquid delivery → self-test → liquid supply. After the first liquid preparation is completed, the next tank of liquid will be automatically prepared until the upper limit of the liquid level in the liquid storage tank. The liquid preparation tank stops waiting for liquid preparation. When the liquid storage tank reaches the lower limit, the liquid preparation program will be automatically started. After the number of people preparing liquid on the day ends, it will automatically stop and wait for the disinfection program.

[0015] 2. Manual liquid preparation; first put the concentrated powder into the undosed powder silo. The powder silo has an upper and lower limit reminder alarm function (the number of powder portions cannot be lower than or higher than the set range value). B main control screen → manual and automatic switch → open the water inlet valve (close the water inlet valve after 20L of water is added) → open the circulation pump (close after 1 minute) → open the distribution valve (close after emptying) → open the water inlet valve (add water to the required liquid dosage and then close it. Let it stand for 2 minutes to check whether the liquid level is accurate. If there is less water, open the water inlet valve to add water. If there is more water, open the distribution valve to reduce water until the required liquid level is reached) → start the circulation pump (restart the heater after 1 minute. If the inlet temperature is lower than the specified temperature, heating is required. To the specified temperature, if heating is not required, you can directly skip restarting the heater) → turn on pneumatic stirring → open the powder feeding bin after 1 minute (the powder feeding bin with powder fed) → turn on the powder conveying (close after 10 seconds) → turn on the material stopper (detect whether there is powder jam, close after 1 minute, if powder jam the system will automatically alarm, → close the powder feeding bin → time the mixing time → turn off the pneumatic stirring → turn off the circulation pump → conductivity detection (the liquid is still for 3 minutes) → PH value detection → open the liquid feeding valve → open the liquid feeding valve → turn on the liquid feeding pump (put all the prepared B liquid into the liquid storage tank and then turn off the circulation pump → liquid feeding valve) → manual and automatic switching → manual self-test start → turn on the liquid supply mode after the self-test is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is an axonometric structural schematic diagram of the utility model.

[0018] In the figure: 1, liquid dispensing tank; 2, liquid storage tank; 3, pneumatic water inlet valve; 4, circulation pump; 5, pneumatic circulation valve; 8, liquid dispensing valve assembly; 9, disinfection assembly; 10, filter assembly; 11, waste discharge assembly; 12, liquid return assembly; 13, first manual liquid return valve; 14, second manual liquid return valve; 15, liquid delivery assembly; 16, powder feeding bin; 17, powder delivery motor; 18, pneumatic stirring device; 19, pneumatic motor; 20, stirring paddle; 21, automatic conductivity detection device; 23, automatic pH value detection device; 24, manual dispensing Liquid valve; 25. Pneumatic liquid dispensing valve; 26. Waste discharge solenoid valve; 27. Pneumatic valve of liquid storage tank; 28. Manual valve of liquid storage tank; 29. ​​Sewage outlet; 30. First pneumatic liquid delivery valve; 31. Manual exhaust valve; 32. First filter; 33. Second filter; 34. Endotoxin filter; 35. Disinfection valve; 36. Heater; 37. Pressure test gauge; 38. Manual liquid delivery valve; 39. Liquid delivery pump; 40. Second liquid delivery valve; 41. Pressure display gauge; 42. Temperature display gauge; 43. Purge port; 44. Liquid level display screen. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example: As attached Figure 1The ultrapure liquid supply system for hemodialysis shown in the figure comprises a liquid dispensing tank 1 and a liquid storage tank 2, wherein a pneumatic water inlet valve 3 is connected to a pipeline on one side of the liquid dispensing tank 1 (a water heater is installed between the pneumatic water inlet valve 3 and the liquid dispensing tank 1), a circulating pump 4 is installed between the liquid dispensing tank 1 and the liquid storage tank 2, a pneumatic circulating valve 5 is installed at one end of the liquid dispensing tank 1 and the pipeline is connected to the circulating pump 4, a liquid dispensing valve assembly 8 is installed at the other end of the liquid dispensing tank 1 and is also connected to the circulating pump 4 through a pipeline, a disinfection assembly 9, a filtering assembly 10 and a waste discharge assembly 11 are connected in sequence between the circulating pump 4 and the liquid storage tank 2, a liquid return assembly 12 is installed on one side of the liquid storage tank 2, and the liquid return assembly 12 comprises a first manual liquid return valve connected by two pipelines 13 and a second manual liquid return valve 14, the liquid storage tank 2 is located on one side of the waste discharge component 11 and is equipped with a liquid delivery component 15 for connecting to the ward, 1. Automatic liquid preparation; first, put the hemodialysis concentrated powder into the powder feeding bin (can meet 30-130 portions of dialysis powder), the powder feeding bin has an upper and lower limit reminder alarm function (the number of powder portions cannot be lower than or higher than the set range value), B main control screen → liquid preparation mode → liquid preparation start → enter the number of liquid portions to be prepared on the day → confirm prompt box → liquid preparation start → confirm prompt box → system automatic operation → automatic water inlet → automatic tank washing → automatic waste discharge → automatic liquid water inlet → automatic dynamic voltage stabilization monitoring → automatic heating → automatic stirring → automatic pH value detection → automatic conductivity detection → automatic liquid delivery → self-test → liquid supply. After the first dispensing is completed, the next tank of liquid will be automatically dispensed until the upper limit of the liquid level in the liquid storage tank. The dispensing tank stops waiting for dispensing. When the liquid storage tank reaches the lower limit, the dispensing program will be automatically started. After the number of people dispensing on that day ends, it will automatically stop and wait for the disinfection program. (A main control screen → dispensing mode → dispensing start → input the number of powder doses (up to 60 can be configured at a time) → confirmation prompt box → dispensing start → automatic water inlet → automatic dynamic pressure balancing → confirmation prompt box → powdering prompt box appears on the screen → click run after powdering → system automatically runs → automatic conductivity detection → automatic pH value detection → automatic liquid delivery → manual self-check once every three days)

[0021] 2. Manual liquid preparation; first put the concentrated powder into the unfilled powder filling bin. The powder filling bin has an upper and lower limit reminder alarm function (the number of powder portions cannot be lower than or higher than the set range value). B main control screen → manual and automatic switch → open the water inlet valve (close the water inlet valve after filling 20L of water) → open the circulation pump (close after 1 minute) → open the dispensing valve (close after emptying) → open the water inlet valve (add water to the required liquid filling water level and then close it, wait for 2 minutes to check whether the liquid level is accurate. If there is less water, open the water inlet valve to add water, and if there is more water, open the dispensing valve. Drain valve to reduce water until the required liquid level is reached) → Start circulation pump (restart heater after 1 minute. If the inlet temperature is lower than the specified temperature, it needs to be heated to the specified temperature. If heating is not required, you can directly skip restarting the heater) → Start pneumatic stirring → Open powder feeding bin after 1 minute (powder feeding bin with good powder feeding) → Start powder conveying (close after 10 seconds) → Open material stopper (check if powder is stuck, close after 1 minute, if powder is stuck, the system will automatically alarm, → Close powder feeding bin → Count stirring time → Close pneumatic stirring → Close circulation Circulating pump → conductivity test (liquid is still for 3 minutes) → PH value test → open liquid delivery valve → open liquid delivery valve → open liquid delivery pump (close the circulating pump after sending all the prepared B liquid into the liquid storage tank → liquid delivery valve) → manual-automatic switch → manual self-test start → start liquid supply mode after self-test is completed (main control screen → manual-automatic switch → open water inlet valve (close water inlet valve after 20L of water is added) → open circulating pump (close after 1 minute) → open the distribution valve (close after emptying) → open the water inlet valve (add water to the required water level of the distribution liquid) Then close it and let it stand for 2 minutes to check whether the liquid level is correct. If there is less water, open the water inlet valve to add water. If there is more water, open the distribution valve to reduce the water until the required liquid level is reached) → Start pneumatic stirring → Start manual powdering after 1 minute → Time for 18 minutes after powdering (settable) → Close and start stirring → Conductivity detection (the liquid is still for 3 minutes) → Open the liquid delivery valve → Start the circulation pump (After sending all the prepared A liquid into the liquid storage tank, close the circulation pump → liquid delivery valve) → Manual-automatic switch → Manual self-test start → After the self-test is completed, start the liquid supply mode).

[0022] As attached Figure 1 As shown, a powder feeding bin 16 is installed on the liquid preparation tank 1, and a powder feeding motor 17 (specifically a servo motor) is installed at the bottom of the powder feeding bin 16. A pneumatic stirring device 18 for stirring the powder in the liquid preparation tank 1 is installed on one side of the feeding motor. The pneumatic stirring device 18 includes an air motor 19 and a stirring paddle 20. The air motor 19 is installed on the liquid preparation tank 1, and the stirring paddle 20 is hinged to the air motor 19 and extends inside the liquid preparation tank 1.

[0023] As attached Figure 1 As shown, the liquid preparation tank 1 is provided with an automatic conductivity detection device 21 , and one side of the automatic conductivity detection device 21 is also provided with an automatic pH value detection device 23 .

[0024] As attached Figure 1As shown, the liquid dispensing valve assembly 8 includes a manual liquid dispensing valve 24 and a pneumatic liquid dispensing valve 25. One end of the manual liquid dispensing valve 24 is connected to the bottom of the liquid dispensing tank 1 through a pipeline, and one end of the pneumatic liquid dispensing valve 25 is connected to the door of the manual liquid dispensing valve 24 through a pipeline, and the other end is hinged on the circulation pump 4.

[0025] As attached Figure 1 As shown, the waste discharge component 11 includes a waste discharge solenoid valve 26, a liquid storage tank pneumatic valve 27 and a liquid storage tank manual valve 28 which are connected together through pipelines in sequence. One end of the waste discharge solenoid valve 26 is connected to the pneumatic liquid distribution valve 25 through a pipeline, and one end of the liquid tank manual valve is connected to the bottom of the liquid storage tank 2 through a pipeline. A sewage outlet 29 is extended from one side of the waste discharge solenoid valve 26 (the system turns on the waste discharge function of the liquid supply tank to empty the pipeline in sequence, and the emptying pressure is 0.3MPa. Due to excessive pressure, the dialysis machine and the liquid supply unit are prohibited from being connected during emptying).

[0026] As attached Figure 2 As shown, the filter assembly 10 includes a first pneumatic liquid delivery valve 30, a manual exhaust valve 31 (a normally open valve), a first filter 32 (two air filter elements (5-inch 0.22 micron blind plugs), a second filter 33 and an endotoxin filter 34 (the first filter 32, the second filter 33 and the endotoxin filter 34 are all provided with pressure gauges. Before replacing the filter, manually close the liquid delivery valve, open the exhaust port and the drain port to drain the liquid, and then replace the filter), one end of the first pneumatic liquid delivery valve is connected to the circulation pump, and one end of the endotoxin filter is connected to one end of the liquid storage tank through a pipeline.

[0027] As attached Figure 2 As shown, the disinfection assembly 9 includes a disinfection valve 35 and a heater 36 which are connected together in sequence through pipelines. One end of the disinfection valve 35 is connected to the circulation pump 4 through the pipeline, and one end of the heater 36 is connected to the liquid storage tank 2 through the pipeline. A pressure detection gauge 37 is installed between the disinfection valve 35 and the heater 36.

[0028] Solution 1: Prepare 20%-50% citric acid disinfectant → Select citric acid disinfection mode → Close the prompt setting box (the disinfection parameters have been set and do not need to be changed) → Click lemon disinfection to start → Confirm the pop-up prompt box → Fill the dispensing tank with water → Send it into the storage tank → Self-check → The screen pops up a citric acid addition prompt box, follow the prompts → Click Run after adding citric acid → The system runs automatically → Soak → Pipeline heating cycle → Fill the dispensing tank with water → Send it into the storage tank → Circulate and cool → Drain → Fill the dispensing tank with water again (a total of 3-5 times of water filling, send the full tank into the storage tank, clean the storage tank and pipeline) → Drain → Empty → Citric acid disinfection is completed. The citric acid disinfection time is too long, so arrange time (5-6 hours). Before disinfection, each liquid supply tank needs to be injected with pure water for circulation. The circulation time of a single pipeline cannot be less than 5 minutes, and it should be emptied after the circulation.

[0029] Solution 2: Elimination Process

[0030] 1. B main control screen → whole machine disinfection mode → close the prompt setting box (disinfection parameters have been set and do not need to be changed) → click on the whole disinfection start → pop-up prompt box (supply disinfection, whole disinfection)

[0031] ① Supply and consumption

[0032] Thermal disinfection of liquid storage tanks and liquid supply pipelines. Click on the supply and disinfection function. The system will automatically perform thermal disinfection on the liquid storage tanks and liquid supply pipelines. → Fill the liquid distribution tank with water (disinfection level of the liquid storage tank) → send the liquid into the liquid storage tank → fill the liquid distribution tank with water again (reserve the temperature of the liquid storage tank and liquid supply pipeline for cooling) → pipeline self-check → cycle heating → cycle cooling → waste discharge → emptying → supply and disinfection completed

[0033] ②Clearance

[0034] Thermal disinfection of the whole machine, thermal disinfection of the whole machine + supply disinfection (the whole machine can only be thermally disinfected after all patients have left the machine).

[0035] Note: Check whether the dialysis machine is disconnected from the fluid supply unit every day after the patient gets off the machine. Due to the excessive circulation pressure of the pipeline during thermal disinfection, if the connection is not disconnected, the dialysis machine will be damaged. A manual self-check is required between two thermal disinfections of the entire machine, otherwise the second disinfection will not be completed.

[0036] As attached Figure 1 As shown, the liquid delivery component 15 includes two groups of manual liquid delivery valves 38, a liquid delivery pump 39, a second liquid delivery valve 40, a pressure display gauge 41 and a temperature display gauge 42, which are symmetrically arranged and respectively connected together by pipelines. A purge port 43 is also arranged between the second liquid delivery valve 40 and the pressure gauge (the liquid supply mode is automatically turned on. When the liquid is dispensed again in the liquid supply mode, the self-check will not be performed again, and it cannot be switched manually. If it is necessary to switch to manual mode, the liquid supply mode must be turned off first, and the liquid supply channel valve will also be closed. The liquid supply channel valve must be manually opened to supply liquid normally. The liquid supply mode must be turned on after the manual mode is switched to the automatic mode, otherwise the liquid dispensed will be self-checked again, affecting the patient's access to the machine).

[0037] As attached Figure 1 As shown, a liquid level display screen 44 is installed on the liquid distribution tank 1.

[0038] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

Claims

1. A hemodialysis ultrapure liquid supply system, comprising a liquid preparation tank (1) and a liquid storage tank (2), characterized in that: A pneumatic water inlet valve (3) is connected to a pipeline on one side of the liquid dispensing tank (1); a circulation pump (4) is installed between the liquid dispensing tank (1) and the liquid storage tank (2); a pneumatic circulation valve (5) is installed at one end of the liquid dispensing tank (1) and the pipeline is connected to the circulation pump (4); a liquid dispensing valve assembly (8) is installed at the other end of the liquid dispensing tank (1) and is also connected to the circulation pump (4) through a pipeline; a disinfection assembly (9), a filtration assembly (10) and a waste discharge assembly (11) are connected in sequence between the circulation pump (4) and the liquid storage tank (2); a liquid return assembly (12) is installed on one side of the liquid storage tank (2); the liquid return assembly (12) comprises a first manual liquid return valve (13) and a second manual liquid return valve (14) connected by two pipelines; and a liquid delivery assembly (15) for connecting to a ward is installed on the liquid storage tank (2) at one side of the waste discharge assembly (11).

2. A hemodialysis ultrapure liquid supply system according to claim 1, characterized in that; A powder feeding bin (16) is installed on the liquid preparation tank (1), a powder feeding motor (17) is installed at the bottom of the powder feeding bin (16), a pneumatic stirring device (18) for stirring the powder in the liquid preparation tank (1) is installed on one side of the powder feeding motor (17), the pneumatic stirring device (18) comprising a pneumatic motor (19) and a stirring paddle (20), the pneumatic motor (19) is installed on the liquid preparation tank (1), and the stirring paddle (20) is hinged to the pneumatic motor (19) and extends into the liquid preparation tank (1).

3. A hemodialysis ultrapure liquid supply system according to claim 2, characterized in that: The liquid preparation tank (1) is provided with an automatic conductivity detection device (21), and one side of the automatic conductivity detection device (21) is also provided with an automatic pH value detection device (23).

4. A hemodialysis ultrapure liquid supply system according to claim 1, characterized in that: The liquid dispensing valve assembly (8) comprises a manual liquid dispensing valve (24) and a pneumatic liquid dispensing valve (25), one end of the manual liquid dispensing valve (24) is connected to the bottom of the liquid dispensing tank (1) via a pipeline, one end of the pneumatic liquid dispensing valve (25) is connected to the door of the manual liquid dispensing valve (24) via a pipeline, and the other end is hinged to the circulation pump (4).

5. A hemodialysis ultrapure liquid supply system according to claim 4, characterized in that: The waste discharge assembly (11) comprises a waste discharge solenoid valve (26), a liquid storage tank pneumatic valve (27) and a liquid storage tank manual valve (28) which are connected together in sequence through pipelines. One end of the waste discharge solenoid valve (26) is connected to the pneumatic liquid distribution valve (25) through a pipeline, and one end of the liquid storage tank manual valve (28) is connected to the bottom of the liquid storage tank (2) through a pipeline. A sewage discharge port (29) is extended from one side of the waste discharge solenoid valve (26) through a pipeline.

6. A hemodialysis ultrapure liquid supply system according to claim 1, characterized in that: The filter assembly (10) comprises a first pneumatic liquid delivery valve (30), a manual exhaust valve (31), a first filter (32), a second filter (33) and an endotoxin filter (34) which are connected together in sequence through pipelines, one end of the first pneumatic liquid delivery valve (30) is connected to a circulation pump (4), and one end of the endotoxin filter (34) is connected to one end of a liquid storage tank (2) through a pipeline.

7. The hemodialysis ultrapure liquid supply system according to claim 1, characterized in that: The disinfection assembly (9) comprises a disinfection valve (35) and a heater (36) which are connected together in sequence through pipelines, one end of the disinfection valve (35) is connected to the circulation pump (4) through the pipeline, and one end of the heater (36) is connected to the liquid storage tank (2) through the pipeline, and a pressure detection gauge (37) is installed between the disinfection valve (35) and the heater (36).

8. The hemodialysis ultrapure liquid supply system according to claim 1, characterized in that: The liquid delivery assembly (15) comprises two groups of manual liquid delivery valves (38) which are symmetrically arranged and respectively connected together through pipelines, a liquid delivery pump (39), a second liquid delivery valve (40), a pressure display gauge (41) and a temperature display gauge (42), and a purge port (43) is also arranged between the second liquid delivery valve (40) and the pressure gauge.

9. The hemodialysis ultrapure liquid supply system according to claim 1, characterized in that: The liquid dispensing tank (1) is provided with a liquid level display screen (44).

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