Blood purification device

Abstract

Provided is a blood purification device (1) for purifying blood (L4) using dialysate (L3), the blood purification device (1) comprising a dialysis device main body (2) as a device main body and an RO unit (3) attached to the dialysis device main body (2), the dialysis device main body (2) comprising: a first component group (27) requiring maintenance; and an attachment space (206) for exposing the first component group (27), the attachment space (206) being open to the outside of the dialysis device main body (2) when the RO unit (3) is in a state of being detached from the dialysis device main body (2), and the attachment space (206) being closed by the RO unit (3) when the RO unit (3) is attached to the dialysis device main body (2).

Description

Technical Field

[0001] The invention relates to a blood purification device. Background Art

[0002] As a related art, there is known a hemodialysis system in which a blood purification device for purifying blood and a dialysate generator for generating dialysis water are configured in a combined manner (for example, see Patent Document 1).

[0003] This conventional hemodialysis system has an openable and closable back panel on the back side of the dialysate generator, and the carbon filter and the reverse osmosis membrane can be replaced by opening the back panel.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: U.S. Patent Application Publication No. 2021-0128807 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] In the blood purification device of this existing hemodialysis system, components that need to be regularly replaced or maintained are arranged not only on the front side, but also on the back side opposite to the dialysate generator. However, there is a problem that its structural design does not take the maintainability of these components into consideration.

[0009] Therefore, an object of the present invention is to provide a blood purification device that can improve maintainability.

[0010] Solutions for solving problems

[0011] In order to achieve the above-mentioned purpose, the present invention provides a blood purification device, which uses dialysate to purify blood. The blood purification device has: a first unit as a device body and a second unit installed on the first unit, the first unit has: a first component group that needs maintenance and an installation space that exposes the first component group, when the second unit is removed from the first unit, the installation space is open to the outside of the first unit, and when the second unit is installed to the first unit, the installation space is closed by the second unit.

[0012] Effects of the Invention

[0013] According to the present invention, maintainability can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] [ Figure 1A ] Figure 1A An example of a block diagram of a blood purification device.

[0015] [ Figure 1B ] Figure 1B This is a diagram for explaining an example of connection between the dialysis device main body and the piping and the like of the RO unit.

[0016] [ Figure 1C ] Figure 1C This is a diagram for explaining an example of the flow of blood, dialysate, etc. in the dialysis device body.

[0017] [ Figure 2A ] Figure 2A This is a diagram schematically showing an example of a state in which a dialysis device main body and an RO unit are integrated.

[0018] [ Figure 2B ] Figure 2B This is a diagram schematically showing an example of a state in which the RO unit is removed from the dialysis device main body.

[0019] [ Figure 3A ] Figure 3A This is a diagram showing an example of a state where the rear cover is installed.

[0020] [ Figure 3B ] Figure 3B This is a diagram showing an example of a state in which the replacement cover is removed.

[0021] [ Figure 3C ] Figure 3C This is a diagram further showing an example of a state in which the top cover is removed.

[0022] [ Figure 4A ] Figure 4A This is a diagram showing an example of a state where the RO unit is removed from the dialysis device main body.

[0023] [ Figure 4B ] Figure 4B This is a perspective view showing an example of a state in which the RO unit is removed from the dialysis device main body.

[0024] [ Figure 5A ] Figure 5A This is a diagram showing an example of the first surface side of the RO unit.

[0025] [ Figure 5B ] Figure 5B This is a diagram showing an example of the second surface side.

[0026] [ Figure 5C ] Figure 5C This is a diagram showing an example of the side surface. DETAILED DESCRIPTION

[0027] [Implementation Method]

[0028] (Overview of the blood purification device 1)

[0029] Figure 1A is an example of a block diagram of a blood purification device related to an embodiment. Figure 1B FIG. 1 is a diagram for explaining an example of connection between the dialysis apparatus body and the piping and the like of the RO unit. Figure 1C is a diagram illustrating an example of the flow of blood, dialysate, etc. in the dialysis device body. Figure 2A This is a diagram schematically showing an example of a state in which a dialysis device main body and an RO unit according to an embodiment are integrated. Figure 2B This is an example schematically showing a state where the RO unit is removed from the dialysis device body. In the following figures related to the embodiments, the proportions and shapes between the figures may be different from the actual proportions and shapes. Figure 1B In the figure, the flow direction of the dialysate L3 and other liquids is indicated by arrows.

[0030] The blood purification device 1 of this embodiment is as follows Figure 1A to Figure 1C As shown, a medical device is used for performing dialysis treatment using a dialyzer 5 as a blood purifier to purify the blood L4 of a patient 9. Figure 1C The purified blood L5 shown is blood returned to the patient 9 after the purified blood L4.

[0031] In a blood purification device 1 for purifying blood L4 using dialysate L3, the blood purification device 1 has: a dialysate body 2 as a first unit of the device body and an RO unit 3 as a second unit installed in the dialysate body 2. The dialysate body 2 has: a first component group 27 that needs maintenance and an installation space 206 that exposes the first component group 27. When the RO unit 3 is removed from the dialysate body 2, the installation space 206 is open to the outside of the dialysate body 2, and when the RO unit 3 is installed on the dialysate body 2, the installation space 206 is closed by the RO unit 3.

[0032] Blood purification device 1 Figures 1A to 2BAs shown, the dialysis device body 2 includes: a dialysate supply and discharge section 23 as a dialysate generating section, the dialysate supply and discharge section 23 mixes the dialysis water L2 and the dialysate stock solution to produce the dialysate L3, and introduces / exports the dialysate L3 between the dialyzer 5 for purifying the blood L4 of the patient 9; and a first mounting section 29 described later, a first component group 27 required for maintenance for at least one of the generation and introduction / export of the dialysate L3 is exposed from the mounting space 206, and the RO unit 3 includes: a second mounting section 300 described later, the second mounting section 300 The part 300 is mounted to and removed from the first mounting part 29 in a state in which the mounting space 206 can be blocked when the RO unit 3 is mounted to the dialysis device body 2, and in a state in which the mounting space 206 can be exposed when the RO unit 3 is removed; a liquid supply port 37 for supplying liquid with external raw water L1; and a dialysis water generating part 31, which generates dialysis water L2 by removing impurities from the raw water L1 supplied from the liquid supply port 37, and supplies the generated dialysis water L2 to the dialysis device body 2.

[0033] The dialysis water L2 is RO (reverse osmosis) water from which bacteria and impurities have been removed from the raw water L1 introduced from the outside. The dialysate raw liquids are B raw liquid L6 and A raw liquid L7.

[0034] (Configuration of Dialysis Device Main Body 2)

[0035] Figure 3A This is a diagram showing an example of a state in which a rear cover is installed on a blood purification device related to an embodiment. Figure 3B This is a diagram showing an example of a state where the replacement cover is removed. Figure 3C This is a diagram further showing an example of a state in which the top cover is removed. Figure 4A This is a diagram showing an example of a state in which the RO unit is removed from the dialysis device body according to the embodiment. Figure 4B This is a perspective view showing an example of a state in which the RO unit is removed from the dialysis device main body.

[0036] like Figure 1A As shown in FIG. 1 , the dialysis device body 2 is generally configured to include: a display unit 21, an extracorporeal circulation unit 22, a dialysis fluid supply and discharge unit 23, a power supply unit 24, and a control unit 25. As an example of the dialysis device body 2, Figure 1A As shown in the figure, it is further divided into a lower unit 2a and an upper unit 2b, wherein the lower unit 2a has a dialysate supply and discharge unit 23, a power supply unit 24 and a control unit 25, and the upper unit 2b has a display unit 21 and an extracorporeal circulation unit 22. The upper unit 2b is, for example, arranged on the upper surface 202 of the housing 20. In addition, the dialysis device body 2 can be formed into one body by the lower unit 2a and the upper unit 2b.

[0037] An example of the display unit 21 is a touch screen that displays treatment progress and the like and accepts touch operations by the user.

[0038] like Figure 1C As shown, the extracorporeal circulation unit 22 includes a blood pump 220 , a syringe pump 221 , a flow meter 222 , and a flow meter 223 .

[0039] The blood pump 220 is, for example, a peristaltic pump and is configured to deliver the blood L4 in the arterial blood circuit 15 to the dialyzer 5 .

[0040] The syringe pump 221 is, for example, a syringe pump and is configured to introduce an anticoagulant for suppressing coagulation of the blood L4 into the arterial blood circuit 15 .

[0041] The flowmeter 222 and the flowmeter 223 are flow sensors using, for example, ultrasonic waves or lasers. The flowmeter 222 measures the flow rate of the blood L4 flowing through the arterial blood circuit 15. The flowmeter 223 is disposed in the venous blood circuit 16 and measures the flow rate of the purified blood L5 flowing through the venous blood circuit 16.

[0042] like Figure 1C As shown, the dialysate supply and discharge unit 23 includes a dialysate diluting unit 23a, a double pump 23b, a pressure gauge 23c, a flow meter 23d, a flow meter 23e, a water removal pump 23f and a pressure gauge 23g.

[0043] like Figure 1C As shown, the dialysate diluting unit 23a is generally configured to generate a dialysate L3 by adjusting the concentration of the drug solution using the dialysate water L2 supplied from the RO unit 3, the B stock solution L6 supplied from the B stock solution tank 233, and the A stock solution L7 supplied from the A stock solution tank 234. The B stock solution tank 233 and the A stock solution tank 234 are connected to the dialysis device body 2, but the present invention is not limited thereto. It does not matter if the dialysate diluting unit 23a is configured to be disposed inside the dialysis device body 2.

[0044] like Figure 1C As shown, the double pump 23b is arranged across the dialysate inlet line 13 and the dialysate discharge line 14. The double pump 23b is configured to apply pressure to the dialysate inlet line 13 to deliver the dialysate L3 to the dialyzer 5, and to apply pressure to the dialysate discharge line 14 to deliver the dialysate discharge liquid L8 to the RO unit 3 through the delivery pipe 231 and the pipe 271. The double pump 23b delivers the dialysate L3 and the dialysate discharge liquid L8 at the same pressure in the dialysate inlet line 13 and the dialysate discharge line 14. In addition, the dialysate discharge liquid L8 can be delivered to a drain tank connected to the dialysis device body 2.

[0045] The pressure gauge 23c and the pressure gauge 23g are semiconductor pressure sensors using diaphragms, for example. The pressure gauge 23c measures the pressure of the dialysate L3. The pressure gauge 23g measures the pressure of the dialysate effluent L8.

[0046] The flowmeter 23d and the flowmeter 23e are flow sensors using, for example, ultrasonic waves or lasers. The flowmeter 23d measures the flow rate of the dialysate L3. The flowmeter 23e measures the flow rate of the dialysis effluent L8.

[0047] The dewatering pump 23 f is connected in a manner bypassing the double pump 23 b and is configured to remove water from the blood L4 of the patient 9 flowing through the dialyzer 5 .

[0048] The dialyzer 5 has a blood inlet 50, a blood outlet 51, a dialysate inlet 52, and a dialysate outlet 53. Figure 1C As shown, the dialysate inlet 52 of the dialyzer 5 is connected to the dialysate inlet pipeline 13, and the dialysate outlet 53 is connected to the dialysate outlet pipeline 14. In addition, the blood inlet 50 of the dialyzer 5 is connected to the arterial blood circuit 15, and the blood outlet 51 is connected to the venous blood circuit 16.

[0049] The dialyzer 5 is configured to have a plurality of hollow fibers, and the blood L4 is purified by the hollow fibers. In addition, the dialyzer 5 is formed with a blood flow path connecting the blood inlet 50 and the blood outlet 51 through a blood purification membrane, and a dialysate flow path connecting the dialysate inlet 52 and the dialysate outlet 53. The hollow fibers constituting the blood purification membrane are formed with micropores penetrating the outer peripheral surface and the inner peripheral surface to form a hollow fiber membrane, and impurities in the blood and the like penetrate into the dialysate L3 through the hollow fiber membrane.

[0050] like Figure 2A , Figure 2B , Figure 4A and Figure 4B As shown, the power supply unit 24 and the electronic circuit unit 26 of the dialysis device body 2 are arranged in the upper space 207 of the installation space 206. The installation space 206 includes an opening 206a opened on the back side 201 of the housing 20 and intersecting with the gravity direction of the housing 20, the upper space 207 and the lower space. The lower space constitutes a maintenance space 208, and the first component group 27 is exposed inside. When the RO unit 3 is installed on the dialysis device body 2, the second component group 34 is located on the front side of the maintenance space 208. In addition, the so-called front side of the maintenance space 208 is, as an example, Figure 2A and Figure 2B The first area 208a shown in FIG. 2 is where the RO unit 3 is embedded. The inner side of the so-called maintenance space 208 is, for example, a second area 208b where the first component group 27 is arranged.

[0051] The power supply unit 24 is configured to supply power for the operation of the dialysis device main body 2 and the RO unit 3. The electronic circuit unit 26 has a control unit 25. The control unit 25 is a microcomputer including a CPU (central processing unit) for performing calculations and processing on acquired data according to a stored program, a RAM (random access memory) and a ROM (read only memory) as semiconductor memories, etc. The control unit 25 is configured to comprehensively control the dialysis device main body 2 and the RO unit 3.

[0052] like Figure 2A As shown, the dialysis device body 2 has a front side 200 and a back side 201 which is the opposite side of the front side 200. When the main moving direction of the dialysis device body 2 is the direction in which the user presses the back side 201 to move the dialysis device body 2, the back side 201 has an installation space 206 for installing the RO unit 3. The so-called main moving direction is, Figure 2A The direction of the arrow A shown is the direction in which the user grasps and pushes the handle 12 disposed on the housing 20 .

[0053] like Figure 2A As shown, the bottom surface 203 of the housing 20 of the dialysis device body 2 has four casters 209. The dialysis device body 2 can move in the direction opposite to the direction of arrow A. Furthermore, the casters 209 have two intersecting rotation axes and rotate, so the direction can be freely changed to move.

[0054] When the RO unit 3 of the blood purification device 1 is installed on the dialysis device body 2, as shown in FIG. Figure 2A As shown, the second component group 34 is located below the power supply unit 24 of the dialysis device body 2. Therefore, in the blood purification device 1, the change in the center of gravity caused by the presence or absence of the RO unit 3 is smaller than when this structure is not adopted, and regardless of the presence or absence of the RO unit 3, mobility can be ensured and tipping can be suppressed.

[0055] Again, if Figure 3A As shown, the back side 201 of the dialysis device body 2 has a rear cover 10 for covering the installed RO unit 3. Figure 3A and Figure 3B As shown in FIG. 1 , the rear cover 10 includes an upper cover 10a mounted on the upper portion of the installation space 206 and a replacement cover 10b mounted on the lower portion of the installation space 206. The upper cover 10a has an upper opening 100 that exposes the power supply unit 24. The replacement cover 10b has a lower opening 101 that exposes the liquid supply port 37 and the liquid discharge port 38. By removing the replacement cover 10b, the carbon filter 32 and the reverse osmosis membrane 33 described later are exposed, and these can be replaced.

[0056] like Figure 2A and Figure 2BAs shown, the installation space 206 of the dialysis device body 2 has a liquid supply part 28, which can receive dialysis water other than the dialysis water L2 generated by the RO unit 3. The dialysis water other than the dialysis water L2 is Figure 1B For example, when the RO unit 3 fails, the blood purification device 1 can use the external dialysis water L9 generated externally through the liquid supply unit 28 to perform dialysis treatment.

[0057] (Regarding the first component group 27)

[0058] The blood purification apparatus 1 is configured so that the piping and the like of the arterial blood circuit 15 and the venous blood circuit 16 for blood circulation can be replaced after treatment is completed. This replacement is relatively easy because the piping and the like are exposed to the outside.

[0059] In the dialysis device body 2, the dialysate L3, the dialysis effluent L8, and the cleaning water L 10 and disinfectant L 11 The dialysis device body 2 allows access to components that need to be replaced or maintained from the front 200, side 204, and side 205 of the housing 20. In addition, components that need to be replaced or maintained on the back 201 side can also be accessed from the installation space 206.

[0060] The first component group 27 includes a plurality of components required for at least one of the generation of the dialysate L3, the introduction of the dialysate L3, and the discharge of the used dialysate L3, i.e., the dialysate discharge L8. The first component group 27 can be accessed from the maintenance space 208 of the installation space 206. The first component group 27 includes, for example, pipes, a conductivity meter, a temperature sensor, a flow sensor, a pressure sensor, a solenoid valve, a pump, and a filter. Figure 4A and Figure 4B , as an example, a plurality of electromagnetic valves 272, a plurality of conductivity meters 273, a liquid delivery pump 274, and a liquid discharge pump 275 are described as the first component group 27. The conductivity meter 273 measures the conductivity of the dialysate L3 (dialysate stock solution) during the dialysate preparation process. The liquid delivery pump 274 is a pump that delivers the dialysate L3 to the dialyzer 5. The liquid discharge pump 275 is a pump that discharges the dialysate L8 from the dialyzer 5.

[0061] (Regarding the Positioning of RO Unit 3)

[0062] Figure 5A This is a diagram showing an example of the first surface side of the RO unit related to the embodiment. Figure 5B This is a diagram showing an example of the second surface side of the RO unit. Figure 5C This is a diagram showing an example of the side view of an RO unit. FIG. 5A to FIG. 5C In the figure, piping is omitted for display.

[0063] like Figure 4B As shown, a base 208d is disposed on the lower side 208c of the maintenance space 208. As an example, the base 208d is L-shaped and is formed by bending a metal plate. Figure 5C As shown, the lower surface 39 of the RO unit 3 is placed. That is, the upper surface 208e determines the position of the RO unit 3 in the vertical direction.

[0064] like Figure 4A and Figure 4B As shown, the side 204 and the side 205 of the maintenance space 208 are provided with a first mounting portion 29. The first mounting portion 29 is generally composed of a plate-shaped mounting plate 290 and a mounting plate 291. The mounting plate 290 and the mounting plate 291 have a plurality of fastening holes 292. These fastening holes 292 have threads and can be fixed with bolts 4 for mounting the RO unit 3. In other words, the mounting plate 290 and the mounting plate 291 determine the position of the RO unit 3 in the front-rear direction.

[0065] (Configuration of RO Unit 3)

[0066] like FIG. 5A to FIG. 5C As shown, the RO unit 3 has a bottom plate 30. The bottom plate 30 is formed into a long and narrow plate shape using a metal material, for example. Moreover, the bottom plate 30 has a first surface 301 opposite to the dialysis device body 2 and a second surface 302 constituting the opposite side of the first surface 301. On the first surface 301, a second component group 34 that needs maintenance is arranged. On the second surface 302, a carbon filter 32 and a reverse osmosis membrane 33 that need to be replaced regularly are arranged.

[0067] The bottom plate 30 has a first support portion 35 for supporting the carbon filter 32 and a second support portion 36 for supporting the reverse osmosis membrane 33 on the second surface 302. The first support portion 35 and the second support portion 36 allow the carbon filter 32 and the reverse osmosis membrane 33 to be installed and removed using tool-free manual bolts 354.

[0068] In addition, if Figure 5A and Figure 5B As shown, the left and right ends of the bottom plate 30 have a plurality of through holes 304. The second mounting portion 300 includes the bottom plate 30 and the plurality of through holes 304. The through holes 304 are formed corresponding to the fastening holes 292 of the dialysis device body 2. The RO unit 3 is connected to the dialysis device body 2 by fixing the bolts 4 on the fastening holes 292 via the through holes 304.

[0069] The first supporting portion 35 includes a supporting seat 350 , a plurality of threads 351 , a lower supporting plate 352 , an upper supporting plate 353 , and a plurality of manual bolts 354 .

[0070] The support seat 350 is a platform for placing the carbon filter 32 and is installed on the bottom plate 30. The threads 351 correspond to the lower support plate 352 and the upper support plate 353, two of each are configured and installed on the bottom plate 30.

[0071] The lower support plate 352 and the upper support plate 353 are formed into a plate shape using, for example, a metal material. Figure 5B As shown, the lower support plate 352 has a cutout portion 352a and a cutout portion 352b cut out from bottom to top. Also, the upper support plate 353 has a cutout portion 353a and a cutout portion 353b cut out from bottom to top.

[0072] The threads 351 are inserted into the cutouts 352a, 352b, 353a, and 353b. By tightening the manual bolts 354 on the threads 351, the carbon filter 32 placed on the support seat 350 and arranged between the threads 351 is mounted on the bottom plate 30. Alternatively, the user can manually rotate the manual bolts 354 to loosen them, and then rotate the lower support plate 352 and the upper support plate 353 upward to remove the carbon filter 32 from the bottom plate 30.

[0073] The second supporting portion 36 includes a supporting seat 360 , a plurality of threads 361 , a lower supporting plate 362 , an upper supporting plate 363 , and a plurality of manual bolts 364 .

[0074] The support seat 360 is a platform for placing the reverse osmosis membrane 33 and is installed on the bottom plate 30. The threads 361 correspond to the lower support plate 362 and the upper support plate 363, two of each are configured and installed on the bottom plate 30.

[0075] The lower support plate 362 and the upper support plate 363 are made of metal materials, for example, in the form of plates. Figure 5B As shown, the lower support plate 362 has a cutout portion 362a and a cutout portion 362b cut out from bottom to top, and the upper support plate 363 has cutout portions 363a and 363b cut out from bottom to top.

[0076] The screws 361 are inserted into the cutouts 362a, 362b, 363a, and 363b. By tightening the manual bolts 364 on the threads 361, the carbon filter membrane 33 placed on the support seat 360 and arranged between the threads 361 is mounted on the bottom plate 30. Alternatively, the user can manually rotate the manual bolts 364 to loosen them, and then rotate the lower support plate 362 and the upper support plate 363 upward to remove the reverse osmosis membrane 33 from the bottom plate 30.

[0077] Again, if Figure 5B and Figure 5CAs shown, the bottom plate 30 is provided with handles 303 at the left and right ends of the second surface 302. The user can use these handles 303 to easily attach and detach the RO unit 3.

[0078] like Figure 5B As shown, the bottom of the RO unit 3 has a liquid supply port 37 and a liquid discharge port 38. The RO unit 3 is connected to the liquid supply port 37 with a pipe, and the raw water L1 is supplied through the liquid supply port 37. The RO unit 3 is also connected to the liquid discharge port 37 with a pipe, and the dialysis liquid L8 is discharged through the liquid discharge port 38.

[0079] (Regarding the second component group 34)

[0080] For example, the second component group 34 is a plurality of components for sucking in raw water L1 and generating and delivering dialysis water L2. The second component group 34 includes pipes, pumps, solenoid valves, conductivity meters, actuators, filters, etc. The filters include an endotoxin capture filter for capturing bacteria and endotoxins, and a particle filter for filtering particles. Figure 5A to Figure 5C As the second component group 34 , a plurality of solenoid valves 340 , a plurality of conductivity meters 341 , a pressure reducing valve 342 , an RO pump 343 , a protection-side water supply pressure sensor 344 , and a control-side water supply pressure sensor 345 are shown.

[0081] The conductivity meter 341 measures the conductivity of the dialysate water L2 on the downstream side of the reverse osmosis membrane 33. The pressure reducing valve 342 reduces the pressure applied to the dialysate piping on the downstream side of the RO pump 343 and keeps it constant. The RO pump 343 injects the raw water L1 that passes through the carbon filter 32 into the reverse osmosis membrane 33. The pressure of the RO pump 343 is adjusted in advance to suit the flow rate through the reverse osmosis membrane 33. The protection side water supply pressure sensor 344 and the control side water supply pressure sensor 345 measure the supply pressure. If the pressures measured by the protection side water supply pressure sensor 344 and the control side water supply pressure sensor 345 deviate, the blood purification device 1 will determine that a fault has occurred. When the water supply pressure is lower than a predetermined value, the blood purification device 1 will also control the closure of the water supply solenoid valve to prevent backflow.

[0082] The second component group 34 is exposed on the first surface 301 of the RO unit 3, thereby facilitating maintenance.

[0083] (About installation of RO unit 3)

[0084] like Figure 1B As shown, the dialysis device body 2 has a receiving tube 230 , a transmitting tube 231 , and a power plug 232 . The RO unit 3 has a delivery tube 310 , a receiving tube 311 , and a power line 312 .

[0085] When the RO unit 3 is mounted on the dialysis device body 2, first, the receiving tube 230 is connected to the delivery tube 310 through the pipe 270, the sending tube 231 is connected to the receiving tube 311 through the pipe 271, and the power cord 312 is connected to the power plug 232 provided on the side of the power supply unit 24. As an example, Figure 4A and Figure 4B As shown, the receiving pipe 230 and the sending pipe 231 are built into the introduction / export area 280 at the lower part of the installation space 206 .

[0086] The user can place the bottom 39 of the RO unit 3 on the top 208e of the base 208d, align the positions of the first mounting portion 29 and the second mounting portion 300, insert the bolt 4 through the through hole 304 into the fastening hole 292 and fasten it, and then install the RO unit 3 on the dialysis device body 2.

[0087] (Effects of Embodiments)

[0088] Specifically, the blood purification device 1 exposes the first component group 27 that needs maintenance in the installation space 206, so that the first component group 27 is within easy reach of the user, making maintenance easier than when it is not exposed.

[0089] In the blood purification device 1, since the carbon filter 32 and the reverse osmosis membrane 33 that need to be replaced regularly are not arranged on the first surface 301 facing the dialysis device body 2, but are arranged on the second surface 302 side of the opposite surface, compared with the case where such a structure is not adopted, the RO unit 3 is easy to replace even if it is not removed from the dialysis device body 2. In addition, the blood purification device 1 also arranges the second component group 34 that needs maintenance on the first surface 301, so that even the components such as the carbon filter 32 and the reverse osmosis membrane 33 that are not frequently replaced or maintained are easy to maintain.

[0090] In the blood purification device 1, since the first support part 35 supporting the carbon filter 32 and the second support part 36 supporting the reverse osmosis membrane 33 are installed using the manual bolts 354, they can be easily removed and installed without using tools, compared with the case of installation using tools.

[0091] Since the blood purification device 1 arranges the power supply unit 24 and the electronic circuit unit 26 in the upper space 207 of the installation space 206, defects caused by adhesion of liquid or immersion in liquid can be suppressed compared with the case where such a structure is not adopted. In addition, in the blood purification device 1, since the power supply unit 24 and the electronic circuit unit 26, which are heavier than the piping, are located at the top, and the second component group 34, which is heavier than the piping, is located below, the position change of the center of gravity before and after installation is smaller than that of the case where such a structure is not adopted, and the mobility can be ensured while preventing tipping.

[0092] In the embodiment, when the user presses the back side 201 to move the blood purification device 1, since the RO unit 3 is installed on the back side 201, the RO unit 3 is located on the user side, which makes it easier for the user to move the blood purification device 1 than when this structure is not adopted.

[0093] The blood purification apparatus 1 can replace the carbon filter 32 and the reverse osmosis membrane 33 by removing the replacement cover 10 b of the rear cover 10 , so replacement is easier than when all rear covers are removed and replacement is impossible.

[0094] The blood purification apparatus 1 includes the liquid supply unit 28 that can receive external dialysis water L9 produced externally. Therefore, even when the RO unit 3 fails, interruption of treatment can be shortened compared to a case where such a configuration is not adopted.

[0095] (Summary of Implementation Methods)

[0096] The following will describe the technical solutions that can be understood from the embodiments described so far by using the symbols in the embodiments, etc. However, the symbols in the following description are not limited to the components specifically shown in the embodiments as the constituent elements in the scope of the claims.

[0097] (First Embodiment)

[0098] [1] A blood purification device (1), which uses a dialysate (L3) to purify blood (L4), and has:

[0099] The first unit (dialysis device main body 2) as the device main body, and the second unit mounted on the first unit (dialysis device main body 2),

[0100] The first unit (dialysis device main body 2) comprises: a first component group (27) requiring maintenance, and an installation space (206) for exposing the first component group (27).

[0101] When the second unit (RO unit 3) is removed from the first unit (dialysis device body 2), the installation space (206) is open to the outside of the first unit (dialysis device body 2).

[0102] When the second unit (RO unit 3) is installed on the first unit (dialysis device body 2), the installation space (206) is closed by the second unit (RO unit 3). By removing the second unit from the first unit, the blood purification device can access the first component group that needs maintenance, thereby improving maintainability compared to a case where this structure is not adopted.

[0103] (Second Embodiment)

[0104] [2] According to the blood purification device (1) described in [1], the first unit (dialysis device body 2) includes: a dialysate production unit (dialysate supply and discharge unit 23), which mixes dialysis water (L2) and dialysate stock solution (B stock solution L6 and stock solution L7) to produce dialysate (L3), and imports / exports the dialysate (L3) between the blood purifier (dialyser 5) that purifies the patient's (9) blood (L4); and a first installation unit (29), wherein a first component group (27) that needs to be maintained for at least one of the generation and import / export of the dialysate (L3) is exposed from the installation space (206), and the second unit (RO unit 3) has: a second installation unit (300), the second mounting portion (300) is mounted to and removed from the first mounting portion (29) in a state in which the mounting space (206) can be blocked when the second unit (RO unit 3) is mounted to the first unit (dialysis device body 2), and in a state in which the mounting space (206) can be exposed when the second unit (RO unit 3) is removed; a liquid supply port (37) for supplying liquid with external raw water (L1); and a dialysis water generating portion (31), the dialysis water generating portion (31) generating dialysis water (L2) by removing impurities in the raw water (L1) supplied from the liquid supply port (37), wherein the generated dialysis water (L2) is supplied to the first unit (dialysis device body 2). The blood purification device exposes the first component group that needs maintenance in the mounting space, thereby improving maintainability compared to a case where it is not exposed.

[0105] (Third Embodiment)

[0106] [3] According to the blood purification device (1) described in [2], the second unit (RO unit 3) has a base plate (30), and the base plate (30) has: a first surface (301) opposite to the first unit (dialysis device body 2), and a second surface (302) constituting the opposite side of the first surface (301), and the second surface (302) is provided with a carbon filter (32) and a reverse osmosis membrane (33) that need to be replaced regularly. The blood purification device is provided with a carbon filter and a reverse osmosis membrane that need to be replaced regularly on the second surface, and replacement becomes easier than when the carbon filter and the reverse osmosis membrane are provided on the first surface.

[0107] (Fourth Embodiment)

[0108] [4] According to the blood purification device (1) described in [3], a second component group (34) requiring maintenance is arranged on the first surface (301). When the second unit is disassembled, since the second component group is located on the first surface, the blood purification device is easy to maintain.

[0109] (Fifth Embodiment)

[0110] [5] According to the blood purification device (1) described in [4], the bottom plate (30) has on the second surface (302): a first support portion (35) for supporting the carbon filter (32); and a second support portion (36) for supporting the reverse osmosis membrane (33), and the first support portion (35) and the second support portion (36) can be used to install and remove the carbon filter (32) and the reverse osmosis membrane (33) using manual bolts (354) without tools. In this blood purification device, the carbon filter and the reverse osmosis membrane are installed by manual bolts, so that removal and installation become easier than in the case where this structure is not adopted.

[0111] (Sixth Embodiment)

[0112] [6] According to the blood purification device (1) described in [5], the first unit (dialysis device body 2) is provided with a power supply unit (24) and an electronic circuit unit (26) in the upper space (207) of the installation space (206), and at the same time, the lower part constitutes a maintenance space (208), and the first component group (27) is exposed on the inner side. When the second unit (RO unit 3) is installed on the first unit (dialysis device body 2), the second component group (34) is located at the front side of the maintenance space (208). In this blood purification device, the power supply unit and the electronic circuit are located at the top, so that it is more difficult to cause adverse conditions caused by liquid adhesion than when they are arranged at the bottom. In addition, since the power supply unit and the electronic circuit unit, which are heavier than the piping, are located at the top, and the second component group, which is heavier than the piping, is located at the bottom, the change in the center of gravity before and after installation is small compared to the case where this structure is not adopted, which ensures mobility and prevents tipping.

[0113] (Seventh Embodiment)

[0114] [7] According to the blood purification device (1) described in [6], the first unit (dialysis device body 2) has a front side (200) and a back side (201), and the back side (201) is the side opposite to the front side (200), wherein when the main moving direction of the first unit (dialysis device body 2) is the direction in which the user presses and moves the back side (201) to move the first unit (dialysis device body 2), the back side (201) has a first mounting portion (29) for mounting the second unit (RO unit 3). The back side of the blood purification device is mounted with the second unit, and therefore, compared with the case where such a structure is not adopted, the second unit is located on the user side, thereby making it easier for the user to move.

[0115] (Eighth Embodiment)

[0116] [8] The blood purification device (1) according to [7] has a rear cover (10) on the back side of the first unit (dialysis device body 2), and the rear cover (10) covers the installed second unit (RO unit 3), and the rear cover (10) has a replacement cover (10b), and by removing the replacement cover (10b), the carbon filter (32) and the reverse osmosis membrane (33) are exposed so that they can be replaced. The blood purification device can replace the carbon filter and the reverse osmosis membrane without removing the entire rear cover, so that replacement is more convenient than in a case where the rear cover cannot be removed.

[0117] (Ninth Embodiment)

[0118] [9] The blood purification device (1) according to [8] is characterized in that the first unit (dialysis device body 2) has a liquid supply portion (28) in the installation space (206), and the liquid supply portion (28) can receive dialysis water (L9) other than the dialysis water (L2) generated by the second unit (RO unit 3). Even if the dialysis water is not supplied from the second unit, the dialysis water generated externally can be used. Therefore, compared with the case where this structure is not adopted, this blood purification device can shorten the interruption of treatment even if a bad condition occurs in the second unit.

[0119] (Tenth Embodiment)

[0120]

[10] According to the blood purification device (1) described in [9], the second unit (RO unit 3) has a bottom plate (30),

[0121] The bottom plate (30) has a first surface (301) mounted on the first unit (dialysis device main body 2) and a second surface (302) constituting the opposite side of the first surface (301).

[0122] A second component group (34) requiring maintenance is disposed on the first surface (301).

[0123] The first unit (dialysis device body 2) comprises: a housing (20) in which the first component group (27) is stored; and an installation space (206) in which the second unit (RO unit 3) is installed.

[0124] The installation space (206) includes: an opening (206a) intersecting with the gravity direction of the housing (20) and opening to the outside of the housing (20); an upper space (207); and a maintenance space (208) serving as a lower space.

[0125] The maintenance space (208) includes: a first area (208a); and a second area (208b), the second area (208b) being adjacent to the first area (208a) and located on the inner side of the housing (20).

[0126] A power supply unit (24) is arranged in the upper space (207) of the installation space (206).

[0127] When the second unit (RO unit 3) is mounted on the first unit (dialysis device body 2), the bottom plate (30) of the second unit (RO unit 3) is mounted on the housing (20) from the outside of the first area (208a) to close the maintenance space (208), the second component group (34) is located on the lower side of the power supply unit (24) in the first area (208a), and the first component group (27) is arranged in the second area (208b) opposite to the second component group (34).

[0128] When the second unit is removed from the first unit, the first component group and the second component group will be exposed. Therefore, compared with the case where this structure is not adopted, the blood purification device can easily perform maintenance of the first component group and the second component group by simply removing the second unit from the first unit.

[0129] (Eleventh Embodiment)

[0130]

[11] According to the blood purification device (1) described in

[10] , the power supply unit (24) is located above the second component group (34) in the direction of gravity, so that the center of gravity of the first unit (dialysis device body 2) changes little before and after the second unit (RO unit 3) is installed on the first unit (dialysis device body 2). In this blood purification device, since the change in the center of gravity after the second unit is installed on the first unit is also small, compared with the case where the center of gravity changes significantly, the blood purification device can be prevented from tipping over regardless of whether the second unit is present.

[0131] (Twelfth Embodiment)

[0132]

[12] The blood purification device according to

[10] has a plurality of casters (209) below the housing (20), the casters (209) being used to move the first unit (dialysis device body 2),

[0133] Before and after the second unit (RO unit 3) is installed on the first unit (dialysis device body 2), the center of gravity position of the first unit (dialysis device body 2) changes little in the moving direction of the casters (209). Regardless of whether the second unit is present, the blood purification device can ensure the mobility of the first unit and prevent it from tipping over.

[0134] The above describes the embodiments of the present invention, but these embodiments are only examples and do not limit the inventions related to the claims. These novel embodiments can also be implemented in various other forms, and various omissions, replacements and changes can be made without departing from the scope of the gist of the present invention. Moreover, not all of the combinations of features described in these embodiments are necessary for the means to solve the problems of the present invention. In addition, the embodiments are included in the scope and gist of the present invention, and are also included in the inventions described in the claims and the scope equivalent thereto.

[0135] Explanation of symbols

[0136] 1...blood purification device, 2...dialysis device body, 3...RO unit, 5...dialyzer, 10...rear cover, 10a...top cover, 10b...replacement cover, 12...handle, 23...dialysis fluid supply and discharge unit, 24...power supply unit, 26...electronic circuit unit, 27...first component group, 28...liquid supply unit, 29...first mounting unit, 30...bottom plate, 31...dialysis water generation unit, 32...carbon filter, 33...reverse osmosis membrane, 34...second component group, 35...first support part, 36...second support part, 206...installation space, 206a...opening part, 207...upper space, 208...maintenance space, 208a...first area, 208b...second area, 300...second installation part, 301...first surface, 302...second surface, L1...raw water, L2...dialysis water, L3...dialysis fluid, L4...blood, L5...purified blood, L6...B stock solution, L7...A stock solution, L8...dialysis drainage, L9...external dialysis water, L 10 ...wash water, L 11 ...disinfectant.

Claims

1. A blood purification device, which uses a dialysate to purify blood, and has: A first unit as the main body of the device and a second unit mounted on the first unit. The first unit comprises: a first component group that needs to be maintained and an installation space for exposing the first component group. When the second unit is removed from the first unit, the installation space is open to the outside of the first unit. When the second unit is mounted on the first unit, the mounting space is closed by the second unit.

2. The blood purification device according to claim 1, wherein the first unit comprises: a dialysate preparation unit, which mixes dialysis water and dialysate stock solution to prepare the dialysate, and imports / exports the dialysate between the blood purifier for purifying the patient's blood; and a first installation unit, wherein A first component group that needs to be maintained for at least one of the generation and introduction / export of the dialysate is exposed from the installation space, The second unit comprises: a second mounting portion, which is mounted to and removed from the first mounting portion in a state in which the mounting space is blocked when the second unit is mounted to the first unit and in a state in which the mounting space is exposed when the second unit is removed; a liquid supply port for supplying liquid with external raw water; and a dialysis water generating portion, which generates the dialysis water by removing impurities in the raw water supplied from the liquid supply port, wherein the generated dialysis water is supplied to the first unit.

3. The blood purification device according to claim 2, wherein the second unit has a bottom plate. The bottom plate has a first surface facing the first unit and a second surface constituting an opposite side of the first surface. The second surface is provided with a carbon filter and a reverse osmosis membrane which need to be replaced regularly. 4 . The blood purification device according to claim 3 , wherein a second component group requiring maintenance is disposed on the first surface.

5. The blood purification device according to claim 4, The bottom plate has, on the second surface, a first support portion for supporting the carbon filter and a second support portion for supporting the reverse osmosis membrane. The first supporting portion and the second supporting portion enable the carbon filter and the reverse osmosis membrane to be mounted and removed using manual bolts without tools.

6. The blood purification device according to claim 5, wherein the first unit is provided with a power supply unit and an electronic circuit unit at the upper portion of the opening of the installation space, and the lower portion constitutes a maintenance space, and the first component group is exposed at the inner side. When the second unit is mounted on the first unit, the second component group is located at the front side of the maintenance space.

7. The blood purification device according to claim 6, wherein the first unit has a front surface and a back surface, the back surface being a surface opposite to the front surface, wherein: When the main moving direction of the first unit is a direction in which a user presses the back side to move the first unit, the back side has the first mounting portion to mount the second unit.

8. The blood purification device according to claim 7, wherein the back side of the first unit has a rear cover, and the rear cover covers the installed second unit. The rear cover has a replacement cover, and by removing the replacement cover, the carbon filter and the reverse osmosis membrane are exposed so that they can be replaced. 9 . The blood purification apparatus according to claim 8 , wherein the first unit has a liquid supply portion in the installation space, and the liquid supply portion can receive the dialysis water other than the dialysis water generated by the second unit.

10. The blood purification device according to claim 1, wherein the second unit has a bottom plate. The bottom plate has a first surface mounted to the first unit and a second surface constituting an opposite side of the first surface. The first surface is provided with a second component group requiring maintenance. The first unit comprises: a housing in which the first component group is stored; and the installation space in which the second unit is installed. The above installation space includes: an opening portion, the opening portion intersecting with the gravity direction of the above-mentioned housing and opening to the outside of the above-mentioned housing; Upper space; And as the maintenance space of the lower space, The above-mentioned maintenance space includes: a first area; and a second region, the second region being adjacent to the first region and being located on the inner side of the housing, A power supply unit is arranged in the upper space of the installation space. When the second unit is installed on the first unit, the bottom plate of the second unit is installed on the chassis from the outside of the first area to close the maintenance space, the second component group is located at the lower side of the power supply unit in the first area, and the first component group is opposite to the second component group and is arranged in the second area.

11. The blood purification device according to claim 10, wherein the power supply unit is located above the second component group in the gravity direction so that the change in the center of gravity position of the first unit is small before and after the second unit is installed on the first unit.

12. The blood purification device according to claim 10, wherein a plurality of casters are provided on the bottom of the housing, and the casters are used to move the first unit. The center of gravity position of the first unit changes little in the moving direction of the caster before and after the second unit is mounted to the first unit.

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