JP2005124775A - Washing device for dialysis system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing device for a dialysis system capable of automatically washing a purified water passage. <P>SOLUTION: When detergent is put in a storage tank 13 of a purified water manufacturing device 2 and a wash of predetermined concentration is prepared, an external control device 6 feeds the wash from the purified water manufacturing device 2 and sets a dialysis fluid feeder 3A to a drainage mode to distribute the wash to the purified water passage 4A and discharge it from a drainage passage 5A of the dialysis fluid feeder 3a. When finishing the washing in the dialysis fluid feeder 3A, the control device stops the drainage mode of the dialysis fluid feeder 3A and makes a dissolving device 3B into a drainage mode to wash the respective dialysis devices in order. This constitution can interlock the purified water manufacturing device with the respective dialysis devices by the control device so as to automatically wash the purified water passage. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  More particularly, the present invention relates to a cleaning apparatus for a dialysis system in which a cleaning liquid is sent to a purified water passage provided between a purified water production apparatus and a dialysis apparatus for cleaning.

Conventionally, as a dialysis system for artificially dialysis of blood, a purified water production apparatus that purifies purified water and a dialysis apparatus that uses purified water are provided, and the purified water production apparatus and the dialysis apparatus are connected to a purified water passage. There is known a dialysis system connected via
In such a dialysis system, an automatic cleaning function is provided for the dialysis device itself, and the internal piping and tank are automatically cleaned every time dialysis treatment is completed. Until now, much attention has not been paid to cleaning of purified water passages through which equipment and purified water are circulated.
However, in recent years, more advanced dialysis fluid purification is required, and it is one of the main points to supply purified water for preparing the dialysis fluid in a sufficiently clean state.
In other words, tap water, which is the raw water of purified water, normally contains a specified amount of sodium hypochlorite and suppresses bacterial growth. Since sodium acid is also removed, the purified water that has been purified has no inhibitory action and is in a state where bacteria can easily propagate.
For this reason, the purified water itself is sufficiently cleaned, but the inside of the pipe of the purified water passage through which the purified water is circulated may leave bacteria without being washed, and bacteria may propagate. There was a risk of contamination of the propagated bacteria.
In view of such circumstances, Patent Document 1 discloses a cleaning method for cleaning the inside of a pipe by introducing a cleaning liquid made of electrolytically acidic water into the pipe constituting the purified water passage.
Japanese Patent No. 2826656

When washing is performed by circulating a cleaning solution through the purified water passage, the purified water passage is always connected to the dialysis device, so the circulated cleaning solution must be discharged through the dialysis device. The cleaning liquid must be circulated through the purified water passage after operating in a state capable of draining in advance.
However, in many cases, a plurality of dialysis devices are provided, and an operator has to manually operate all of these devices in a drained state, which causes a problem that the work is complicated.
Furthermore, since the purified water production equipment is used continuously compared to the dialysis equipment, the cleaning work is limited to the time when the purified water production equipment is not used, such as at night or when the hospital is on a holiday. Automation of work was desired.
In view of such a problem, the present invention provides a washing apparatus for a dialysis system capable of automatically washing the purified water passage.

That is, the cleaning device of the dialysis system according to the present invention includes a purified water production device that purifies purified water, and a plurality of dialysis devices that are connected to the purified water production device via purified water passages and use the purified water. In a dialysis system cleaning apparatus in which a cleaning liquid is supplied from the purified water production apparatus to wash each purified water passage with respect to a dialysis system including the apparatus,
A control device for controlling the operation of the purified water production apparatus and each dialysis device is provided, and at the time of washing, the control device controls the liquid feeding operation of the purified water production device and the drainage operation of each dialysis device. Then, each dialysis apparatus is switched to the drainage mode in a predetermined order, and the cleaning liquid from the purified water production apparatus is supplied to each dialysis apparatus to wash each purified water passage in the predetermined order. It is characterized by that.

  According to the above-described invention, the purified water production apparatus and each dialysis apparatus are interlocked by the control device to automatically wash each purified water path piped between the purified water path and each dialysis apparatus. be able to.

FIG. 1 shows a dialysis system 1 according to the present invention, in which purified water is fed from a purified water production apparatus 2 for purifying purified water, and three dialysis units connected to the purified water passage are shown. It supplies to the apparatus 3A-3C for use.
A purified water passage 4 through which purified water flows is provided between the purified water production device 2 and each of the dialysis devices 3A to 3C. In this embodiment, the purified water passage 4 exits from the purified water production device 2. One pipe branches into the purified water passages 4A to 4C on the way, and is connected to the dialysis apparatuses 3A to 3C, respectively. In addition, each of the dialysis apparatuses 3A to 3C is provided with drainage passages 5A to 5C for draining from the inside of each apparatus.
As the dialysis apparatuses 3A to 3C, in this embodiment, 3A is a dialysate supply apparatus 3A that is prepared by diluting a dialysate stock solution to a predetermined concentration and supplying the dialysate to a monitoring apparatus for dialysis. 3C is a personal dialysis apparatus 3C that performs hemodialysis by preparing a dialysis liquid.
Further, the purified water production apparatus 2 and the dialysis apparatuses 3A to 3C are provided with external input / output terminals 6A to 6D. By connecting the external control apparatus 6 to the external input / output terminals 6A to 6D, the purified water can be purified. The liquid feeding operation of the water production apparatus 2 and the draining operation of the dialysis apparatuses 3A to 3C can be controlled from the outside.
In this embodiment, for convenience of explanation, each of the dialysis devices 3A to 3C includes one dialysis fluid supply device, one dissolution device, and one personal dialysis device. There are various cases such as a case where a plurality of dissolution apparatuses are provided and a case where a plurality of personal dialysis apparatus are provided. It only has to be connected to.

As shown in FIG. 1, the purified water production apparatus 2 is connected to a raw water passage 11 for supplying raw water, and this raw water passage 11 is connected to a purification means 12 for removing impurities from the raw water.
The purified water purified by the purification means 12 is temporarily stored in a storage tank 13, and the purified water passage 4 is connected to the storage tank 13. The purified water passage 4 is provided with a liquid feed pump 14 for feeding purified water and an electromagnetic valve 15. Further, the storage tank 13 is provided with a discharge passage 13B having an on-off valve 13A so that liquid can be directly discharged from the storage tank 13.
In the case where purified water is supplied from the purified water production apparatus 2 to each of the dialysis apparatuses 3A to 3C, the purified water production apparatus 2 is controlled in its liquid feeding operation by its own internal control device (not shown). By operating the pump 14 and opening the electromagnetic valve 15, purified water is sent from the storage tank 13 to the purified water passage 4.
Here, the cleaning liquid used when cleaning the purified water passage 4 is obtained by mixing a predetermined amount of cleaning agent made of peracetic acid into the purified water stored in the storage tank 13, and this cleaning liquid is fed. By feeding the liquid with the pump 14, cleaning from the storage tank 13 to the downstream side becomes possible.

Next, the dialysis fluid supply device 3A as the dialysis device 3A will be described with reference to FIG. 2. The dialysis fluid supply device 3A is an A stock solution tank 21A, B in which a stock solution A and a stock solution B are stored. A stock solution tank 21B, two first and second mixing tanks 22A and 22B that mix the stock solution from these stock solution tanks 21A and 21B and dilute with purified water to create a dialysate, and the prepared dialysate And a dialysate tank 23 for temporary storage.
A dialysate passage 24 is provided between the first and second mixing tanks 22A, 22B and the dialysate tank 23, and the purified water passage 4A branches in the middle of the two dialysate passages 24. Let me connect.
Further, the drainage passage 5A is connected to the downstream side of the connection position of the purified water passage 4A in the two dialysate passages 24, so that the dialysate in both the mixing tanks 22A and 22B is not supplied to the dialysate tank 23 and is externally supplied. It is configured so that it can be drained. Further, the branched purified water passages 4A are connected in a state where the raw solution passages 26A and 26B from the two raw solution tanks 21A and 21B are branched.
A first electromagnetic valve 28A is provided upstream of the purified water passage 4A, and second and third electromagnetic valves 28B and 28C are provided in the branched purified water passages 4A, respectively. Are provided with fourth to seventh electromagnetic valves 28D to 28G.
Further, first and second three-way valves 29A and 29B are respectively provided at the connecting portion between the dialysate passage 24 and the drainage passage 5A, and the first and second three-way valves 29A and 29B are completely closed. Is also possible. As a result, the communication between the dialysate passage 24 and the drainage passage 5A is blocked, and the mixing tanks 22A, 22B and the dialysate tank 23 are communicated, and the communication can be blocked by completely closing from this state. It is.
Further, the communication between the mixing tanks 22A and 22B and the dialysate tank 23 is cut off, and the dialysate passage 24 and the drainage passage 5A are communicated to connect the mixing tanks 22A and 22B and the drainage passage 5A. In addition, the purified water passage 4A and the drainage passage 5A can be communicated with each other through the dialysate passage 24, and the communication can be blocked by completely closing from this state.
Further, the dialysate tank 23 is provided with a supply passage 39 provided with an eighth electromagnetic valve 28H, and a discharge passage 40 provided with a ninth electromagnetic valve 28I is provided between the supply passage 39 and the drainage passage 5A. ing. The dialysate is supplied through the supply passage 39 to a dialysis monitoring device (not shown) that performs dialysis treatment.

When dialysate is prepared by the dialysate supply device 3A, for example, the first, second, fourth, and fifth electromagnetic valves 28A, 28B, 28D, and 28E are controlled by the operation control of its own internal control device (not shown). The third, sixth, and seventh electromagnetic valves 28C, 28F, and 28G are closed, the first three-way valve 29A is fully closed, and the second three-way valve 29B includes the second mixing tank 22B, the dialysate tank 23, As the state is switched so as to communicate with each other, purified water, A stock solution, and B stock solution are introduced into the first mixing tank 22A to create a dialysate in the first mixing tank 22A, and from one second mixing tank 22B. Supplies the already prepared dialysate to the dialysate tank 23.
And by switching the open / close state of the solenoid valve and the three-way valve excluding the first solenoid valve 28A every predetermined time, the dialysate is created and discharged alternately in the first mixing tank 22A and the second mixing tank 22B. Then, the dialysate is continuously supplied to the dialysate tank 23, and the dialysate can be continuously supplied from the supply passage 39 to the monitoring device for dialysis.

FIG. 3 shows a dissolving device 3B as the dialysis device 3B, and the dissolving device 3B in this embodiment is configured to prepare an A stock solution used in, for example, the dialysate supply device 3A.
The dissolving device 3B is a hopper 31 in which A powder that is dissolved in purified water and becomes A stock solution, a feeder 32 that drops A powder from the hopper 31 by a predetermined amount, and the A powder is dissolved in purified water. A dissolution tank 33 for preparing the A stock solution and a stock solution tank 34 for storing the prepared A stock solution.
The dissolution tank 33 and the stock solution tank 34 are connected by a stock solution passage 35, and the purified water passage 4 </ b> B and the drainage passage 5 </ b> B are connected at the same location in the middle of the stock solution passage 35. The stock solution tank 34 is provided with a supply passage 36 for supplying the prepared A stock solution to a dialysate supply device (not shown).
The purified water passage 4B includes first and second solenoid valves 38A and 38B on the upstream side and the downstream side, respectively, and a third portion on the downstream side of the connecting portion with the purified water passage 4B in the stock solution passage 35. The electromagnetic valve 38C is further provided with a fourth electromagnetic valve 38D in the drainage passage 5B, and a fifth electromagnetic valve 38E in the supply passage 36.
With such a configuration, purified water is supplied to the dissolution tank 33 and the prepared dialysate can be supplied to the stock solution tank 34. Further, the dialysate in the dissolution tank 33 is not supplied to the stock solution tank 34 and can be drained to the outside from the drainage passage 5B, and can be drained directly from the purified water passage 4B to the drainage passage 5B. It has become.

When the A stock solution is prepared by the dissolving device 3B, the first and second electromagnetic valves 38A and 38B are opened and the third and fourth electromagnetic valves 38C and 38D are closed by an internal control device (not shown) provided by itself. Then, the purified water passage 4B and the dissolution tank 33 are communicated to supply purified water to the dissolution tank 33. In this state, the feeder 32 supplies a predetermined amount of A powder into the dissolution tank 33. In A, A powder is dissolved to prepare A stock solution.
Thereafter, when the second solenoid valve 38B is closed and the third solenoid valve 38C is opened, the dissolution tank 33 and the stock solution tank 34 are communicated, and the stock solution A flows down to the stock solution tank 34 and is supplied from the supply passage 36 to the dialysate supply device. Supplied to.

The personal dialysis apparatus 3C as the dialysis apparatus 3C shown in FIG. 4 will be described. The personal dialysis apparatus 3C is supplied with a dialyzer 41 for hemodialysis and a new dialysate to the dialyzer 41. The first and second chambers 42A and 42B for collecting the used dialysate from the dialyzer 41 are provided.
The first and second chambers 42A and 42B are respectively divided into recovery liquid chambers 44a and 44b, supply liquid chambers 45a and 45b, and variable volume chambers 46a and 46b between them. The amount is to be controlled.
Then, the purified water passage 4C and a supply passage 48 for supplying a new dialysate prepared in the supply liquid chambers 45a and 45b to the dialyzer 41 are branched and connected to the supply liquid chambers 45a and 45b, respectively. The purified water passage 4C is connected to an A stock solution tank 43A through a stock solution passage 47A and a B stock solution tank 43B through a stock solution passage 47B.
The recovery fluid chambers 44a and 44b have a recovery passage 49 for recovering the used dialysate from the dialyzer 41, and a drainage passage 5C for discharging the used dialysate recovered in the recovery fluid chambers 44a and 44b to the outside. Are branched and connected.
Couplers 51 are provided at the tips of the recovery passage 49 and the supply passage 48, respectively, and when the wetted part inside the personal dialyzer 3C is washed, the dialyzer 41 is removed and the supply passage 48 is removed. The recovery passageway 49 is connected by the coupler 51.
Silicone oil is sealed in the variable volume chambers 46a and 46b, and the volume of the variable volume chambers 46a and 46b is changed by increasing or decreasing the amount of the silicone oil by the silicone oil pumps 52A and 52B. The amount of water supplied and recovered is controlled to remove water from the blood during dialysis.

A first solenoid valve 53A and a liquid feed pump 54 are provided at an upstream position where the purified water passage 4C is not branched, and each of the stock solution passages 47A and 47B connected to the purified water passage 4C has second, Third electromagnetic valves 53B and 53C are provided.
The branched purified water passages 4C are respectively provided with fourth and fifth electromagnetic valves 53D and 53E, and the supply passage 48 is provided with sixth and seventh electromagnetic valves 53F and 53G at the branched positions. .
Further, a recovery pump 55 is provided at an upstream position where the recovery passage 49 is not branched, and an eighth electromagnetic valve 53H is provided at a downstream position where the drainage passage 5C is not branched.
The leading ends of the recovery passage 49 and the drainage passage 5C are connected to first and second three-way valves 56A and 56B, respectively, and both passages 49 and 5C are selected via the first and second three-way valves 56A and 56B. Therefore, it communicates with the recovery liquid chambers 44a and 44b.

When performing dialysis work with the personal dialysis machine 3C, the liquid feeding pump 54 and the recovery pump 55 are operated by an internal control device (not shown) provided by the personal dialysis machine, and the first, second, third, eighth In a state where the solenoid valves 53A, 53B, 53C, 53H are opened, the open / close states of the fourth to seventh solenoid valves 53D-53G are switched, and purified water is supplied to the supply liquid chambers 45a, 45b of the first and second chambers 42A, 42B. The passage 4C and the supply passage 48 are alternately connected, and the opening and closing states of the first and second three-way valves 56A and 56B are switched to alternately connect the recovery passage 49 and the drainage passage 5C to the recovery liquid chambers 44a and 44b. Like that.
Thereby, for example, purified water, A stock solution, and B stock solution are supplied from the purified water passage 4C to the supply liquid chamber 45b of the second chamber 42B, and a dialysate is created in the supply liquid chamber 45b. The used dialysate 44b is discharged to the outside through the drainage passage 5C.
On the other hand, a new dialysate is sent from the supply liquid chamber 45a of the first chamber 42A to the supply passage 48. This dialysate is dialyzed by the dialyzer 41 and then used as the used dialysate as the first chamber 42A. Is recovered in the recovered liquid chamber 44a. At this time, water can be removed in the dialyzer 41 by operating the silicone oil pump 52A to change the capacity of the variable volume chamber 46a.
A continuous dialysis operation is performed by alternately switching these operation states in the first chamber 42A and the second chamber 42B.
When washing the wetted part inside the personal dialyzer 3C, the supply passage 48 and the recovery passage 49 are connected by the coupler 51, and the control of the internal control device (not shown) By operating in the same manner as the operation at the time of dialysis, the purified water supplied from the purified water passage 4C is discharged from the drainage passage 5C.

As shown in FIG. 1, the external control device 6 is provided independently of the purified water production device 2 and the dialysis devices 3A to 3C. As described above, the purified water production device 2 and the dialysis devices 3A to 3C are provided. Connected via external input / output terminals 6A to 6D, the operation of these devices is controlled from the outside, and each device can be linked and controlled to be operated in conjunction with each other.
The specific operation content of each device controlled by the external control device 6 will be described below.
First, with respect to the purified water production apparatus 2, the purified means 12 is operated to store purified water in the storage tank 13, and the liquid feed pump 14 is operated to open the electromagnetic valve 15 to open the purified water passage 4 from the storage tank 13. The liquid feeding operation is controlled such that the washing liquid and the purified water are fed, and the liquid feeding pump 14 is stopped and the electromagnetic valve 15 is closed to stop the liquid feeding. Further, the on-off valve 13A is opened to drain the liquid from the storage tank 13 via the discharge passage 13B.
Next, for the dialysate supply device 3A, the first to third solenoid valves 28A to 28C shown in FIG. 2 are opened, and the dialysate passage 24 is connected to the first and second three-way valves 29A and 29B. As a state communicating with 5A, other solenoid valves are closed. In the dialysate supply device 3A, this state is set to the drainage mode.
As a result, the cleaning liquid and purified water flowing through the purified water passage 4 are discharged from the purified water passage 4A to the outside through the drainage passage 5A through the path indicated by the thick line in FIG. Further, by closing the first electromagnetic valve 28A from this state, the inflow of the cleaning liquid and the purified water is prevented, and the external control device 6 controls these draining operations.
Regarding the melting device 3B, the first, second, and fourth electromagnetic valves 38A, 38B, and 38D shown in FIG. 3 are opened, and the other electromagnetic valves are closed. In the dissolving device 3B, this state is set as a draining mode.
As a result, the cleaning liquid and the purified water flowing through the purified water passage 4 are discharged from the purified water passage 4B to the outside through the drainage passage 5B through the route indicated by the thick line in FIG. Further, by closing the first electromagnetic valve 38A from this state, the inflow of the cleaning liquid and the purified water is prevented, and the external control device 6 controls these draining operations.
Regarding the personal dialysis machine 3C, the other electromagnetic valves and three-way valves are operated in the same manner as during dialysis treatment with the second and third electromagnetic valves 53B and 53C shown in FIG. 4 closed. In the personal dialysis machine 3C, this state is set as a drainage mode.
When cleaning the purified water passage 4, the supply passage 48 and the recovery passage 49 are connected in advance by the coupler 51, so that the cleaning liquid and purified water flowing through the purified water passage 4 are supplied from the purified water passage 4 C to FIG. 4. Is discharged to the outside through the drainage passage 5C through a path indicated by a thick line. Further, by closing the first electromagnetic valve 53A from this state, the inflow of the cleaning liquid and the purified water is prevented, and the external control device 6 controls these draining operations.

The cleaning operation of the purified water passage 4 by the external control device 6 having the above configuration will be described.
In the purified water production apparatus 2, a predetermined amount of purified water is stored in the storage tank 13 in advance, and an operator inputs a predetermined amount of cleaning agent into the storage tank 13 to prepare a cleaning liquid. In this state, the purified water production apparatus 2 and the dialysis apparatuses 3A to 3C are in a standby state in which the power is turned on.
When the external control device 6 is in the activated state and a control start command is input, first, chemical cleaning that causes the cleaning liquid to flow through the purified water passage 4 is started.
The external control device 6 switches, for example, the dialysis device 3A to the drain mode according to the control content set in advance, and the dialysis devices 3B and 3C are not in the drain mode and prevent the flow of the cleaning liquid. State. In this state, the liquid feed pump 14 is operated with a predetermined capacity and the electromagnetic valve 15 is opened, so that the cleaning liquid in the storage tank 13 is fed to the purified water passage 4.
As a result, the cleaning liquid sent is not drained from the purified water passages 4B and 4C, but flows only through the purified water passage 4A via the dialysis apparatus 3A and is drained from the drainage passage 5A.

When a predetermined time set in advance in this state has elapsed, the external control device 6 switches to a state in which the drainage mode of the dialysis device 3A is canceled and the flow of the cleaning liquid is blocked, and the purified water passage 4A is placed in the pipe for a predetermined time. While the cleaning liquid is stored, the process is shifted to the detained cleaning, and the dialysis apparatus 3B is switched to the draining mode.
In addition, the dialysis apparatus 3C is in a state in which the flow of the cleaning liquid is prevented as it is. As a result, the cleaning liquid fed is not drained from the purified water passages 4A and 4C, but flows only through the purified water passage 4B via the dialysis device 3B and is drained from the drainage passage 5B.
In this state, when a predetermined time elapses in advance, the external control device 6 cancels the drainage mode of the dialysis device 3B and switches to a state in which the inflow of the cleaning solution is blocked, and shifts to the cleaning operation for the purified water passage 4B. At the same time, the dialysis apparatus 3C is switched to the drainage mode.
Further, the dialysis apparatus 3A is kept in the state where the inflow of the cleaning liquid is prevented as it is and the cleaning of the purified water passage 4A is continued. As a result, the cleaning liquid fed is not drained from the purified water passages 4A and 4B, but flows only through the purified water passage 4C via the dialysis device 3C and is drained from the drainage passage 5C.

In this state, when the predetermined time elapses, the external control device 6 cancels the draining mode of the dialysis device 3C and switches to a state in which the inflow of the cleaning solution is blocked, and the purified water passage 4C is shifted to the additional cleaning. At the same time, the liquid feed pump 14 of the purified water production apparatus 2 is stopped and the electromagnetic valve 15 is closed to leave all the purified water passages 4A to 4C in a cleaning state.
If there are three or more dialysis devices, only one device is set in the drainage mode in the same manner, and the rest of the dialysis devices are blocked from flowing in the cleaning solution. The cleaning liquid is circulated and cleaned mainly on the purified water passages branched and connected.

  In this way, the dialysis apparatuses 3A to 3C are switched to the drainage mode in a predetermined order, and the cleaning liquid is circulated in the predetermined order through the respective purified water passages 4A to 4C that are branched and connected. Therefore, for example, as in the dialysate supply device 3A and the personal dialyzer 3C, the flow rate of the purified water used differs during normal operation during dialysis treatment, and the drainage flow rate from the drainage passages 5A to 5C. Even if there is a difference in the flow rate, it is prevented that the cleaning liquid concentrates only in the purified water passage drained at a large flow rate and the flow rate and water pressure are insufficient in the purified water passage with a small drainage flow rate. The cleaning liquid can be circulated and cleaned with a sufficient flow rate and water pressure over the entire area of the pipes 4. In addition, the storage tank 13 of the purified water production apparatus 2 is washed together, and the purified water passage 4 is sufficiently washed from the beginning to the end.

During the continuous cleaning state, the external control device 6 opens the on-off valve 13A of the purified water production device 2 to discharge the cleaning liquid remaining in the storage tank 13 from the discharge passage 13B.
When the cleaning liquid is discharged, the external control device 6 causes the purified water to flow down from the purifying means 12 with the on-off valve 13A opened, and then rinses the cleaning liquid, and then closes the on-off valve 13A to store the purified water in the storage tank 13. . After a predetermined amount of purified water is stored in the storage tank 13 in this way, the cleaning liquid is washed away in the order in which the set-up cleaning time has passed in advance for each of the purified water passages 4A to 4C. It has become.
The external control device 6 switches the dialysis device 3A to the drainage mode, for example, and continues the washing state without putting the dialysis devices 3B and 3C into the drainage mode. In this state, the liquid feed pump 14 is operated with a predetermined capacity and the electromagnetic valve 15 is opened, so that the purified water in the storage tank 13 is fed to the purified water passage 4. As a result, the cleaning liquid in the purified water passage 4A is swept away by the purified water sent, and is drained from the drainage passage 5A via the dialysis apparatus 3A, so that the inside of the piping is washed with water.

When a predetermined time set in this state elapses, the external control device 6 is operated in the same manner as when washing with the washing liquid, and the dialysis device 3A is released from the drain mode and switched to a state in which purified water is prevented from flowing. At the same time, the dialysis apparatus 3B is switched to the drainage mode to allow purified water to flow and shift to water washing. With respect to the dialysis apparatus 3C, the purified water passage 4C is continuously washed in a state where the inflow of purified water is prevented as it is.
In this state, when a predetermined time elapses in advance, the external control device 6 cancels the draining mode of the dialysis device 3B and switches to a state where the inflow of purified water is blocked, and puts the dialysis device 3C into the draining mode. Switch to distribute purified water and move to water washing.
After that, when a predetermined time has elapsed, the external control device 6 cancels the drainage mode of the dialysis device 3C and switches to a state where the inflow of purified water is blocked, and operates the liquid feed pump 14 of the purified water production device 2. Stop and end the series of cleaning operations.
In such water washing, similarly to the case of the above-described chemical liquid washing, each of the dialysis apparatuses 3A to 3C is switched to the drainage mode in a predetermined order, and each of the purified water passages 4A that are branched and connected to each other. Purified water is circulated in a predetermined order in 4C, so that the purified water is circulated at a sufficient flow rate and water pressure over the entire area of the piping constituting the purified water passage 4 and washed away without leaving the cleaning liquid. Can do.

The chemical cleaning time and sequence for each purified water passage 4A to 4C, the extra cleaning time, the water cleaning time and sequence, and the number of times each cleaning is repeated are set in advance in the external control device 6 and can be freely changed. It is supposed to be possible.
In the present embodiment, a cleaning solution in which a cleaning agent made of peracetic acid is dissolved in purified water is used. However, the present invention is not limited to this. Any other liquid can be used as long as it has a necessary cleaning action, such as the electrolytically strong acidic water disclosed.

  As described above, since the external control device 6 is provided and the operations of the purified water production device 2 and the plurality of dialysis devices 3A to 3C are controlled in conjunction with each other, the cleaning of the purified water passage 4 can be automated. By setting the start of the cleaning operation control by the external control device 6 as a timer, it is possible to perform cleaning in an unattended state such as at night or when the hospital is on a holiday.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing which shows the dialysis system 1 and its washing | cleaning apparatus concerning a present Example. Schematic which shows the internal structure of a dialysate supply apparatus. Schematic which shows the internal structure of a melt | dissolution apparatus. Schematic which shows the internal structure of a personal dialysis apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dialysis system 2 Purified water production apparatus 3A-3C Dialysis apparatus 3A Dialysate supply apparatus 3B Dissolution apparatus 3C Personal dialysis apparatus 4 Purified water path 5 Drainage path 6 External control apparatus

Claims (4)

Purified water production apparatus for purifying purified water and a dialysis system provided with a plurality of dialysis apparatuses each connected to the purified water production apparatus via purified water passages and using the purified water. In the cleaning device of the dialysis system in which the cleaning liquid is supplied from the water production device to clean each purified water passage,
A control device for controlling the operation of the purified water production apparatus and each dialysis device is provided, and at the time of washing, the control device controls the liquid feeding operation of the purified water production device and the drainage operation of each dialysis device. Then, each dialysis apparatus is switched to the drainage mode in a predetermined order, and the cleaning liquid from the purified water production apparatus is supplied to each dialysis apparatus to wash each purified water passage in the predetermined order. A cleaning device for a dialysis system.   The controller, after supplying the cleaning liquid from the purified water production apparatus to the dialysis apparatus and cleaning the purified water passage, stops the draining operation of the dialysis apparatus and stores the cleaning liquid in the purified water passage. The dialysis system cleaning device according to claim 1, wherein   The cleaning liquid is stored in a plurality of purified water passages at the same time, and the control device controls the liquid feeding operation of the purified water production device and the drainage operation of each dialysis device. Each dialysis apparatus is switched to the drainage mode in order, and purified water from the purified water production apparatus is supplied to each purified water passage in the predetermined order to discharge the washing liquid. Item 3. The dialysis system cleaning device according to Item 2.   The dialysis apparatus according to any one of claims 1 to 3, wherein the dialysis apparatus is a personal dialysis apparatus, a dialysis fluid supply apparatus, or a dissolution apparatus for dissolving dialysis fluid powder. .

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