Liquid storage and supply device and hemodialysis system

Abstract

The present disclosure provides a liquid storage and supply device, comprising: a liquid storage device, comprising a liquid outlet and a circulating liquid inlet arranged at the bottom, and a liquid inlet and an exhaust port arranged at the top; a liquid inlet pipeline, one end of which is connected to the liquid inlet of the liquid storage device for introducing liquid; an exhaust device, which is connected to the exhaust port of the liquid storage device; a circulating liquid inlet pipeline and a first valve arranged on the circulating liquid inlet pipeline, one end of the circulating liquid inlet pipeline is connected to the circulating liquid inlet of the liquid storage device; a liquid outlet pipeline and a positive pressure pump arranged on the liquid outlet pipeline, one end of the liquid outlet pipeline is connected to the liquid outlet of the liquid storage device; a liquid return pipeline and a negative pressure pump arranged on the liquid return pipeline, one end of the liquid return pipeline is connected to the circulating liquid inlet pipeline; a first valve port of the second valve is connected to the other end of the circulating liquid inlet pipeline; a rear-stage pipeline and a first switch valve arranged on the rear-stage pipeline, one end of the rear-stage pipeline is connected to the other end of the liquid outlet pipeline, and the other end of the rear-stage pipeline is connected to the other end of the liquid return pipeline.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hemodialysis, and in particular to a liquid storage and supply device and a hemodialysis system. Background Art

[0002] Hemodialysis is one of the renal replacement therapies for patients with acute and chronic renal failure. During hemodialysis, the blood in the patient's body is drained to the outside of the body, passed through a dialysis machine for blood purification, and then the purified blood is returned to the patient's body. Hemodialysis can achieve the therapeutic purpose of removing metabolic waste and excess water from the body and maintaining electrolyte and acid-base balance. During the use of the dialysis machine, tiny bubbles will be generated at the filter membrane of the dialysis machine. The bubbles may enter other pipes of the dialysis machine and are difficult to drain. When the bubbles enter the human body, air embolism will form, leading to the death of the patient. At present, air monitoring devices and venous tube clamp devices are mainly used for monitoring and processing. When bubbles pass through the blood circuit, the air monitoring device can detect the bubbles, and the venous tube clamp device will clamp the blood circuit to prevent air from entering the human body. Then the nursing staff quickly manually discharges the bubbles to avoid coagulation, and finally resumes normal dialysis operation.

[0003] Although the existing technology can prevent bubbles from entering the patient's body to a certain extent, if the bubbles in the dialysis machine pipeline are not completely removed, there are still certain safety hazards, endangering the patient's life. In addition, when the bubbles are small, the air monitoring device cannot detect them in place, and there is still a large safety hazard. Therefore, it is necessary to completely discharge the bubbles in the liquid in the dialysis machine pipeline to ensure the patient's life safety during the dialysis process. Summary of the invention

[0004] The purpose of the embodiments of the present disclosure is to provide a liquid storage and supply device, which is a fully enclosed liquid storage and supply system, which greatly reduces the possibility of bacterial entry, is beneficial to improving the dialysis environment and improving the dialysis quality; at the same time, the liquid can circulate in the liquid storage and supply device, remove the bubbles in the liquid in the pipeline, and reduce the risk of bubbles entering the patient's body during the dialysis process, thereby comprehensively improving the patient's quality of life after recovery.

[0005] According to one aspect of an embodiment of the present disclosure, there is provided a liquid storage and supply device, comprising:

[0006] The liquid storage device comprises a liquid outlet and a circulating liquid inlet arranged at the bottom, and a liquid inlet and an exhaust port arranged at the top;

[0007] A liquid inlet pipe, one end of which is connected to the liquid inlet of the liquid storage device, and the other end is used for passing liquid;

[0008] An exhaust device connected to an exhaust port of the liquid storage device;

[0009] A circulating liquid inlet pipeline and a first valve arranged on the circulating liquid inlet pipeline, one end of the circulating liquid inlet pipeline is connected to the circulating liquid inlet port of the liquid storage device;

[0010] A liquid outlet pipe and a positive pressure pump arranged on the liquid outlet pipe, one end of the liquid outlet pipe is connected to the liquid outlet of the liquid storage device;

[0011] A liquid return pipe and a negative pressure pump arranged on the liquid return pipe, one end of the liquid return pipe is connected to the circulating liquid inlet pipe and the connection point is farther away from the circulating liquid inlet of the liquid storage device than the first valve;

[0012] The second valve comprises a first valve port and a second valve port, wherein the first valve port is connected to the other end of the circulating liquid inlet pipeline;

[0013] A rear-stage pipeline and a first switch valve arranged on the rear-stage pipeline, one end of the rear-stage pipeline is connected to the other end of the liquid outlet pipeline, and the other end of the rear-stage pipeline is connected to the other end of the liquid return pipeline.

[0014] In some embodiments, the liquid storage and supply device further comprises:

[0015] A first heating device is arranged on the liquid outlet pipeline and is further away from the liquid outlet of the liquid storage device than the positive pressure pump;

[0016] The second heating device is arranged on the liquid return pipe and is closer to the connection between the liquid return pipe and the circulating liquid inlet pipe than the negative pressure pump;

[0017] The liquid discharge pipe has one end connected to the second valve port of the second valve and the other end being a liquid discharge port.

[0018] In some embodiments, the liquid storage and supply device also includes a circulation pipe and a second switch valve arranged on the circulation pipe, one end of the circulation pipe is connected to the liquid outlet pipe and the connection is closer to the other end of the liquid outlet pipe than the first heating device, and the other end of the circulation pipe is connected to the liquid return pipe and the connection is closer to the other end of the liquid return pipe than the negative pressure pump.

[0019] In some embodiments, the liquid storage and supply device also includes a controller and a temperature detection device arranged on the side wall of the liquid storage device, and the temperature detection device is used to detect the temperature of the liquid in the liquid storage device; wherein the controller is electrically connected to the first switch valve, the second switch valve, and the temperature detection device, and when the temperature of the liquid in the liquid storage device does not reach the target temperature, the controller controls the first switch valve to close and the second switch valve to open; when the temperature of the liquid in the liquid storage device does not reach the target temperature, the controller controls the first switch valve to open and the second switch valve to close.

[0020] In some embodiments, the liquid storage and supply device further includes a spray device disposed on the top of the liquid storage device, and the liquid inlet of the spray device is connected to the liquid inlet of the liquid storage device.

[0021] In some embodiments, the first heating device is disposed around the outside of the liquid outlet pipe with a gap between them, and the second heating device is disposed around the outside of the liquid return pipe with a gap between them.

[0022] In some embodiments, the liquid comprises an alkaline solution or an acidic solution.

[0023] In some embodiments, the liquid storage and supply device also includes a controller and an acidic and alkaline solution conductivity detection device, and the acidic and alkaline solution conductivity detection device is used to detect the conductivity of the solution; wherein the controller is electrically connected to the first heating device, the second heating device, and the detection device, and when the solution is alkaline, the controller controls the first heating device and the second heating device to turn on, and when the solution is acidic, the controller controls the first heating device and the second heating device to turn off.

[0024] In some embodiments, the second valve is a first three-way valve, further comprising a third valve port;

[0025] The liquid storage and supply device also includes a second three-way valve arranged on the liquid inlet pipeline, including a fourth valve port, a fifth valve port and a sixth valve port. The fourth valve port and the fifth valve port are arranged on the liquid inlet pipeline and the fifth valve port is closer to the liquid inlet of the liquid storage device than the fourth valve port. The sixth valve port of the second three-way valve is connected to the third valve port of the first three-way valve through a pipeline.

[0026] According to another aspect of the embodiments of the present disclosure, there is provided a hemodialysis system, comprising the liquid storage and supply device described in any of the aforementioned technical solutions.

[0027] The liquid storage and supply device provided by the embodiment of the present disclosure is a fully enclosed liquid storage and supply system, which greatly reduces the possibility of bacteria entering, and is conducive to improving the dialysis environment and the quality of dialysis; at the same time, the liquid can circulate in the liquid storage and supply device, and the positive pressure pump can promote the flow of the liquid in the liquid storage device. Under the action of the negative pressure pump, the bubbles in the liquid in the pipeline are broken, and then the gas is discharged from the exhaust port of the liquid storage device, and then the liquid enters the liquid storage device through the circulating liquid inlet pipeline. After multiple reciprocating cycles, the bubbles in the liquid in the pipeline can be removed. The risk of bubbles entering the patient's body during dialysis is effectively reduced, which is conducive to protecting the patient's life and health. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present disclosure or related technologies. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the structure of the liquid storage and supply device in some embodiments of the present disclosure;

[0030] Figure 2 It is a schematic diagram of the structure of the liquid storage and supply device in some embodiments of the present disclosure when it is in a circulation degassing mode;

[0031] Figure 3a It is a schematic structural diagram of a liquid storage and supply device in some embodiments of the present disclosure when it is in a first set time period of a cyclic thermal disinfection mode;

[0032] Figure 3b It is a schematic structural diagram of a liquid storage and supply device in some embodiments of the present disclosure when it is in a second set time period of a cyclic thermal disinfection mode;

[0033] Figure 4 It is a schematic diagram of the structure of the liquid storage and supply device in some embodiments of the present disclosure when it is in a circulation heating mode;

[0034] Figure 5 It is a schematic diagram of the structure of the liquid storage and supply device in some embodiments of the present disclosure when it is in the backwash mode;

[0035] Figure 6 It is a schematic structural diagram of a liquid storage and supply device in some other embodiments of the present disclosure when it is in a cyclic degassing mode;

[0036] Figure 7 Schematic diagram of the structure of the liquid storage and supply device of other embodiments of the present disclosure. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0038] The embodiment of the present disclosure provides a liquid storage and supply device to remove bubbles in the pipeline to prevent them from entering the patient's body during dialysis and protect the patient's life and health. The liquid storage and supply device provided by the present disclosure can at least realize at least one of the following working modes: cyclic degassing mode, cyclic heating mode, cyclic thermal disinfection mode, and backwashing mode. Figure 1-Figure 7 The liquid storage and supply device provided in the embodiment of the present disclosure is described in detail.

[0039] like Figure 1 As shown, the embodiment of the present disclosure provides a liquid storage and supply device, comprising:

[0040] The liquid storage device 311 includes a liquid outlet 1a and a circulating liquid inlet 1b arranged at the bottom, and a liquid inlet 1c and an exhaust port 1d arranged at the top;

[0041] A liquid inlet pipe 351, one end of which is connected to the liquid inlet 1c of the liquid storage device 311, and the other end of which is used to introduce liquid;

[0042] An exhaust device 312 connected to the exhaust port 1d of the liquid storage device 311;

[0043] A circulating liquid inlet pipeline 321 and a first valve 322 arranged on the circulating liquid inlet pipeline 321, one end of the circulating liquid inlet pipeline 321 is connected to the circulating liquid inlet port 1b of the liquid storage device 311;

[0044] A liquid outlet pipe 331 and a positive pressure pump 332 disposed on the liquid outlet pipe 331, one end of the liquid outlet pipe 331 is connected to the liquid outlet 1a of the liquid storage device 311;

[0045] A liquid return pipe 341 and a negative pressure pump 342 disposed on the liquid return pipe 341, wherein one end of the liquid return pipe 341 is connected to the circulating liquid inlet pipe 321 and the connection point is further away from the circulating liquid inlet port 1b of the liquid storage device 311 than the first valve 322;

[0046] The second valve 323 includes a first valve port 2a and a second valve port 2b, wherein the first valve port 2a is connected to the other end of the circulating liquid inlet pipe 321;

[0047] The rear stage pipeline 361 and the first switch valve 362 disposed on the rear stage pipeline 361 , one end of the rear stage pipeline 361 is connected to the other end of the liquid outlet pipeline 331 , and the other end of the rear stage pipeline 361 is connected to the other end of the liquid return pipeline 341 .

[0048] In some embodiments of the present disclosure, the other end of the liquid inlet pipe 351 can be connected to the filtering device 38.

[0049] When the hemodialysis system is not in operation for maintenance, such as Figure 2 As shown, the liquid storage and supply device is in a circulation degassing mode, and the flow direction of the liquid is shown by the arrow in the figure. At this time, the first valve 322 and the first switch valve 362 are opened, and the second valve 323 is closed. The liquid passing through the filter device 38 enters the liquid storage device 311 through the liquid inlet pipe 351. The positive pressure pump 332 in the liquid storage and supply device can push the liquid in the liquid storage device 311 into the liquid outlet pipe 331, and then into the back-stage pipe 361. Then, under the action of the negative pressure pump 342, the bubbles in the pipe burst, and the liquid enters the liquid storage device 311 through the circulation liquid inlet pipe 321. The gas is discharged through the exhaust device 312. After repeated cycles, the bubbles in the pipe and other equipment can be removed to ensure the normal operation of the hemodialysis system.

[0050] like Figure 1 As shown, in some embodiments of the present disclosure, the liquid storage and supply device further includes:

[0051] The first heating device 333 is disposed on the liquid outlet pipe 331 and is further away from the liquid outlet a of the liquid storage device 311 than the positive pressure pump 332;

[0052] The second heating device 343 is disposed on the liquid return pipe 341 and is closer to the connection between the liquid return pipe 341 and the circulating liquid inlet pipe 321 than the negative pressure pump 342;

[0053] One end of the liquid discharge pipe 324 is connected to the second valve port 2b of the second valve 323, and the other end is a liquid discharge port.

[0054] In some embodiments of the present disclosure, the discharge port of the discharge pipe 324 can be connected to the waste liquid recovery device 325 .

[0055] In some embodiments of the present disclosure, the aforementioned liquid comprises an alkaline solution or an acidic solution. In the present disclosure, the acidic solution is not particularly limited, as long as the purpose of the present disclosure can be achieved, for example, the solute of the acidic solution comprises acetic acid, sodium chloride, potassium chloride, calcium chloride, and magnesium chloride. In the present disclosure, the alkaline solution is not particularly limited, as long as the purpose of the present disclosure can be achieved, for example, the solute of the alkaline solution comprises sodium bicarbonate, or the solute of the alkaline solution comprises sodium bicarbonate and sodium chloride.

[0056] A heating device is provided on the liquid outlet pipe 331 and the liquid return pipe 341 to heat the liquid, and the liquid storage and supply device can be thermally disinfected, including the following two stages:

[0057] The first stage, such as Figure 3a As shown, the liquid storage and supply device is in the first set time period of the circulating heat disinfection mode, and the flow direction of the liquid is shown by the arrow in the figure. At this time, the first valve 322, the first switch valve 362, the first heating device 333 and the second heating device 343 are open, and the first valve port 2a and the second valve port 2b of the second valve 323 are closed. The first heating device 333 and the second heating device 343 can heat the liquid in the pipeline, and then pass through the liquid outlet pipeline 331, the rear stage pipeline 361 and the liquid return pipeline 341 in sequence, and then enter the liquid storage device 311 through the circulating liquid inlet pipeline 321. This cycle is repeated many times to achieve circulating heat disinfection of the entire pipeline, and remove bacteria and other microorganisms that grow in the pipeline.

[0058] The second stage, such as Figure 3bAs shown, after the first set time period, the liquid storage and supply device is in the second set time period of the cyclic thermal disinfection mode, and the flow direction of the liquid is shown by the arrow in the figure. At this time, the first switch valve 362, the first valve port 2a and the second valve port 2b of the second valve 323, the first heating device 333 and the second heating device 343 are opened, and the first valve 322 is closed. The liquid that has completed the cyclic thermal disinfection is discharged through the drain pipe 324 into the waste liquid recovery device 325, and the entire cyclic thermal disinfection process is completed.

[0059] In some embodiments of the present disclosure, the liquid in the liquid storage and liquid supply device is a sodium bicarbonate aqueous solution, which is alkaline and can inactivate bacteria and viruses generated by the liquid storage and liquid supply device during normal operation, thereby achieving the purpose of sterilization and virus removal, forming a physical-chemical combined thermal disinfection, and improving the efficiency of thermal disinfection. The above set time periods can be determined according to actual needs or experience.

[0060] In some embodiments of the present disclosure, the liquid storage and supply device also includes a circulation pipe 371 and a second switch valve 372 arranged on the circulation pipe 371, one end of the circulation pipe 371 is connected to the liquid outlet pipe 331 and the connection is closer to the other end of the liquid outlet pipe 331 than the first heating device 333, and the other end of the circulation pipe 371 is connected to the return liquid pipe 341 and the connection is closer to the other end of the return liquid pipe 341 than the negative pressure pump 342.

[0061] like Figure 4 As shown, the liquid storage and supply device is in the circulation heating mode, and the liquid flows as shown by the arrow in the figure. At this time, the first valve 322, the second switch valve 372, the first heating device 333 and the second heating device 343 are open, and the first valve port 2a and the second valve port 2b of the second valve 323 and the first switch valve 362 are closed. Due to the long path of the rear-stage pipeline 361, the temperature rise is slow during the heating process of the liquid, and heat is easily lost. The setting of the circulation pipeline 371 can shorten the flow path of the liquid during the heating process, thereby reducing heat energy loss and improving heating efficiency.

[0062] In some embodiments of the present disclosure, the liquid storage and supply device also includes a controller and a temperature detection device 313 arranged on the side wall of the liquid storage device 311, and the temperature detection device 313 is used to detect the temperature of the liquid in the liquid storage device 311; wherein the controller is electrically connected to the first switch valve 362, the second switch valve 372, and the temperature detection device 313, and when the temperature of the liquid in the liquid storage device 311 does not reach the target temperature, the controller controls the first switch valve 362 to close and the second switch valve 372 to open; when the temperature of the liquid in the liquid storage device 311 reaches the target temperature, the controller controls the first switch valve 362 to open and the second switch valve 372 to close. That is, when the liquid is not heated to the target temperature, the first valve opening 2a and the second valve opening 2b of the first switch valve 362 and the second valve 323 are closed, and the first valve 322 and the second switch valve 372 are opened, and the liquid enters the return liquid pipeline 341 from the circulation pipeline 371, and then enters the liquid storage device 311, so that the liquid is circulated and heated in a shorter pipeline path; when the liquid is heated to the target temperature, the first valve 322 and the first switch valve 362 are opened, and the second switch valve 372 and the first valve opening 2a and the second valve opening 2b of the second valve 323 are closed, so that the liquid enters the rear-stage pipeline 361, and the entire pipeline is thermally disinfected. Heating and disinfection are carried out in time and in sections, which can effectively improve the efficiency of thermal disinfection. In addition, the controller is electrically connected to the first switch valve 362, the second switch valve 372, and the temperature detection device 313, and the degree of automation of the equipment is high, which is more conducive to improving production efficiency.

[0063] In some embodiments of the present disclosure, the target temperature is not particularly limited as long as the purpose of the present disclosure can be achieved. For example, the target temperature is 85°C.

[0064] like Figure 1 As shown, in some embodiments of the present disclosure, the liquid storage and supply device further includes a spray device 314, which is arranged on the top of the liquid storage device 311, and the liquid inlet of the spray device 314 is connected to the liquid inlet c of the liquid storage device 311. When the liquid storage and supply device is in the circulation heating mode, although the path through which the liquid flows is short, the proteins and lipids and other substances produced by the bacteria and viruses after losing their activity enter the liquid storage device 311 with the liquid during the circulation heating process and are adsorbed on the inner wall of the liquid storage device 311. Therefore, the arrangement of the spray device 314 can effectively clean the proteins and lipids adsorbed on the inner wall of the liquid storage device 311, and then discharge them from the drainage pipe 324 with the liquid in the circulation heat disinfection mode.

[0065] In some embodiments of the present disclosure, the first heating device 333 is disposed around the outside of the liquid outlet pipe 331 and there is a gap between the first heating device 333 and the liquid outlet pipe 331, and the second heating device 343 is disposed around the outside of the liquid return pipe 341 and there is a gap between the second heating device 343 and the liquid return pipe 341.

[0066] The first heating device 333 is arranged around the outside of the liquid outlet pipe 331 with a gap between the first heating device 333 and the liquid outlet pipe 331, and the second heating device 343 is arranged around the outside of the liquid return pipe 341 with a gap between the second heating device 343 and the liquid return pipe 341, so that the liquid in the liquid outlet pipe 331 and the liquid return pipe 341 can be evenly and fully heated, which is conducive to improving the overall heating efficiency. In the present disclosure, there is no special limitation on the first heating device 333 and the second heating device 343, as long as the purpose of the present disclosure can be achieved. For example, the first heating device 333 and the second heating device 343 are annular heating tubes.

[0067] In some embodiments of the present disclosure, the liquid storage and supply device further includes a controller and an acid-base solution conductivity detection device, and the acid-base solution conductivity detection device is used to detect the conductivity of the solution; wherein the controller is electrically connected to the first heating device 333, the second heating device 343, and the detection device, and when the solution is alkaline, the controller controls the first heating device 333 and the second heating device 343 to turn on, and when the solution is acidic, the controller controls the first heating device 333 and the second heating device 343 to turn off upon receiving a signal indicating that the solution is acidic. wherein the acid-base solution conductivity detection device is an acid-resistant and alkali-resistant acid-base solution conductivity detection device.

[0068] In some embodiments of the present disclosure, the acidic solution uses acetic acid, sodium chloride, potassium chloride, etc. as solutes. The above solutes are easily soluble in water, so there is no need to heat them, and there is no need to turn on the first heating device 333 and the second heating device 343. The alkaline solution uses sodium bicarbonate, etc. as solutes. Sodium bicarbonate dissolves slowly at room temperature and is greatly affected by seasonal temperature changes. Therefore, the alkaline solution is generally heated to increase the dissolution rate and achieve full dissolution, and the first heating device 333 and the second heating device 343 need to be turned on. In addition, the controller is electrically connected to the first heating device 333, the second heating device 343, and the detection device, and the degree of automation of the equipment is high, which is more conducive to improving production efficiency.

[0069] In the present disclosure, there is no particular limitation on the target temperature of heating the alkaline solution, as long as the purpose of the present disclosure can be achieved. For example, the target temperature of heating the alkaline solution is 20-25°C.

[0070] In some embodiments of the present disclosure, the second valve 323 is a first three-way valve and further includes a third valve port 2c;

[0071] The liquid storage and supply device also includes a second three-way valve 352 arranged on the liquid inlet pipe 351, including a fourth valve port 3a, a fifth valve port 3b and a sixth valve port 3c. The fourth valve port 3a and the fifth valve port 3b are arranged on the liquid inlet pipe 351 and the fifth valve port 3b is closer to the liquid inlet 1c of the liquid storage device 311 than the fourth valve port 3a. The sixth valve port 3c of the second three-way valve 352 is connected to the third valve port 2c of the first three-way valve through a pipe.

[0072] like Figure 5 As shown, the liquid storage and supply device is in another circulation degassing mode, and the flow direction of the liquid is shown by the arrow in the figure. At this time, the first switch valve 362, the first valve port 2a and the third valve port 2c of the first three-way valve, and the second valve port 3b and the third valve port 3c of the second three-way valve 352 are opened, and the first valve 322, the second switch valve 372, the second valve port 2b of the second valve 323, and the first valve port 3a of the second three-way valve 352 are closed. The liquid in the return liquid pipeline 341 can enter the liquid storage device 311 through the pipeline between the second three-way valve 352 and the first three-way valve and the liquid inlet pipeline 351 in sequence, so as to remove the bubbles in the liquid in the pipeline and other equipment and ensure the normal operation of the hemodialysis system.

[0073] like Figure 6 As shown, the liquid storage and supply device is in the backwash mode, and the flow direction of the liquid is shown by the arrow in the figure. At this time, the second switch valve 372, the first valve port 2a and the third valve port 2c of the first three-way valve, the first valve port 3a and the third valve port 3c of the second three-way valve 352, the first heating device 333, and the second heating device 343 are opened, and the first valve 322, the first switch valve 362, the second valve port 2b of the first three-way valve, and the second valve port 3b of the second three-way valve 352 are closed. The heated liquid can enter the filter device 38 to backwash the filter device 38. For example, using an alkaline solution can remove bacteria, viruses and other attachments in the filter device, which is beneficial to increasing the service life of the filter device 38.

[0074] like Figure 7 As shown, in some embodiments of the present disclosure, the liquid storage and supply device further includes a parallel rear-stage pipeline 363 and a third switch valve 364 arranged on the parallel rear-stage pipeline 363. In the cyclic degassing mode or the cyclic thermal disinfection mode, the rear-stage pipeline 361 and the parallel rear-stage pipeline 363 can be degassed or thermally disinfected at the same time, or separately. There can be one or more parallel rear-stage pipelines 363.

[0075] According to another aspect of the embodiments of the present disclosure, a hemodialysis system is provided, comprising the liquid storage and supply device described in any of the aforementioned embodiments. Since the liquid storage and supply device can effectively remove bubbles in the liquid in the pipeline and the equipment, the risk of bubbles entering the patient's body during the dialysis process is reduced; the liquid storage and supply device or the filter device 38 can also be thermally disinfected to remove viruses and bacteria brought by the pipeline and the equipment during use, which is beneficial to the patient's health. Therefore, the hemodialysis system including any of the aforementioned embodiments also has the aforementioned beneficial effects.

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment 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, method, article or equipment. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0077] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0078] The above are only preferred embodiments of the present disclosure and are not intended to limit the protection scope of the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure are included in the protection scope of the present disclosure.

Claims

1. A liquid storage and supply device, characterized in that: include: The liquid storage device comprises a liquid outlet and a circulating liquid inlet arranged at the bottom, and a liquid inlet and an exhaust port arranged at the top; A liquid inlet pipe, one end of which is connected to the liquid inlet of the liquid storage device, and the other end is used for passing liquid; An exhaust device connected to an exhaust port of the liquid storage device; A circulating liquid inlet pipeline and a first valve arranged on the circulating liquid inlet pipeline, one end of the circulating liquid inlet pipeline is connected to the circulating liquid inlet port of the liquid storage device; A liquid outlet pipe and a positive pressure pump arranged on the liquid outlet pipe, one end of the liquid outlet pipe is connected to the liquid outlet of the liquid storage device; A liquid return pipe and a negative pressure pump arranged on the liquid return pipe, one end of the liquid return pipe is connected to the circulating liquid inlet pipe and the connection point is farther away from the circulating liquid inlet of the liquid storage device than the first valve; The second valve comprises a first valve port and a second valve port, wherein the first valve port is connected to the other end of the circulating liquid inlet pipeline; A rear-stage pipeline and a first switch valve arranged on the rear-stage pipeline, one end of the rear-stage pipeline is connected to the other end of the liquid outlet pipeline, and the other end of the rear-stage pipeline is connected to the other end of the liquid return pipeline; A first heating device is arranged on the liquid outlet pipeline and is further away from the liquid outlet of the liquid storage device than the positive pressure pump; The second heating device is arranged on the liquid return pipe and is closer to the connection between the liquid return pipe and the circulating liquid inlet pipe than the negative pressure pump; A liquid discharge pipe, one end of which is connected to the second valve port of the second valve, and the other end of which is a liquid discharge port; and A circulation pipeline and a second switch valve arranged on the circulation pipeline, one end of the circulation pipeline is connected to the liquid outlet pipeline and the connection is closer to the other end of the liquid outlet pipeline than the first heating device, and the other end of the circulation pipeline is connected to the return liquid pipeline and the connection is closer to the other end of the return liquid pipeline than the negative pressure pump.

2. The liquid storage and supply device according to claim 1, characterized in that: It also includes a controller and a temperature detection device arranged on the side wall of the liquid storage device, wherein the temperature detection device is used to detect the temperature of the liquid in the liquid storage device; wherein the controller is electrically connected to the first switch valve, the second switch valve, and the temperature detection device, and when the temperature of the liquid in the liquid storage device does not reach the target temperature, the controller controls the first switch valve to close and the second switch valve to open, and when the temperature of the liquid in the liquid storage device reaches the target temperature, the controller controls the first switch valve to open and the second switch valve to close.

3. The liquid storage and supply device according to claim 1, characterized in that: It also includes a spray device, which is arranged on the top of the liquid storage device, and the liquid inlet of the spray device is connected to the liquid inlet of the liquid storage device.

4. The liquid storage and supply device according to claim 1, characterized in that: The first heating device is disposed around the outside of the liquid outlet pipe with a gap between them, and the second heating device is disposed around the outside of the liquid return pipe with a gap between them.

5. The liquid storage and supply device according to claim 1, characterized in that: The liquid comprises an alkaline solution or an acidic solution.

6. The liquid storage and supply device according to claim 5, characterized in that: It also includes a controller and an acid-base solution conductivity detection device, which is used to detect the conductivity of the solution; wherein the controller is electrically connected to the first heating device, the second heating device, and the detection device, and when the solution is alkaline, the controller controls the first heating device and the second heating device to turn on, and when the solution is acidic, the controller controls the first heating device and the second heating device to turn off.

7. The liquid storage and supply device according to any one of claims 1 to 6, characterized in that: The second valve is a first three-way valve and also includes a third valve port; The liquid storage and supply device also includes a second three-way valve arranged on the liquid inlet pipeline, including a fourth valve port, a fifth valve port and a sixth valve port. The fourth valve port and the fifth valve port are arranged on the liquid inlet pipeline and the fifth valve port is closer to the liquid inlet of the liquid storage device than the fourth valve port. The sixth valve port of the second three-way valve is connected to the third valve port of the first three-way valve through a pipeline.

8. A hemodialysis system, characterized in that: It comprises a liquid storage and supply device according to any one of claims 1-7.

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