JP2017029301A - Washing system - Google Patents

Abstract

SOLUTION: When washing a dialysate circuit 2 of a dialyzer 1, a male lure connector 6 disposed on an end of a first supply tube 7 is fitted to a first washing port 11 for connection. The male lure connector 6 comprises an inner cylinder 31 for circulating a liquid and an outer cylinder 32 which is integrated with an outer peripheral part of the tip end side of the inner cylinder 31, and a female screw 32B is formed on an inner peripheral face on the tip end side of the outer cylinder 32. On prescribed positions of the outer cylinder 32, four insertion holes 32D for washing are perforated. When a washing liquid is supplied to a washing chamber 27, the washing liquid is circulated in the inner cylinder 31 and the supply tube 7, and the washing liquid is also circulated in a gap 32C and in the insertion holes 32D. Therefore, the female screw 32B and the outer peripheral face of the inner cylinder 31 facing the female screw, are also surely washed by the washing liquid.EFFECT: A washing system which can be easily attached and detached, and which can surely wash a space between an inner cylinder 31 and an outer cylinder 32 can be provided.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a cleaning system, for example, a cleaning system suitable for cleaning a connection portion when supplying a dialysate stock solution to a dialysis machine.

Conventionally, in a dialysis machine, a dialysate circuit is provided with a supply tube, and two types of dialysate stock solutions are supplied to the dialysate circuit via the supply tube and mixed to create a dialysate. ing. Conventionally, a system using a soft bag and a tank storing the dialysate stock solution to supply the dialysate stock solution to the dialysate circuit via the supply tube is known (for example, Patent Document 1). In the dialysis apparatus of Patent Document 1, a male luer connector is provided at the end of the supply tube, while a female luer connector is provided on the tube on the soft bag side so that both connectors are connected as required.
Conventionally, a configuration of a male luer connector and a female luer connector for connecting the end portions of one and the other fluid passages is known, for example, from Patent Document 2.
By the way, since the supply tube of a dialysis machine is used repeatedly, it needs to be washed. Conventionally, a dialysis apparatus of a type in which a dialysate stock solution stored in a tank is sucked up by a supply tube, and a configuration in which the supply tube is cleaned by a cleaning chamber provided in a main body portion of the dialysis apparatus has been proposed. (For example, patent document 3).

Japanese National Patent Publication No. 8-500511 Utility Model Registration No. 3125016 Japanese Patent No. 3947037

  By the way, in the dialysis apparatus provided with the washing chamber as in Patent Document 3, in order to detachably connect the end of the supply tube of the dialysis apparatus and the container of the dialysate stock solution, a male luer connector and a female luer connector are provided. It is possible to use it. However, in this case, there is a problem that cleaning of the male luer connector becomes insufficient due to the configuration of the male luer connector. More specifically, the male luer connector includes an inner cylinder and an outer cylinder, and the cleaning liquid is difficult to flow between the outer peripheral surface of the inner cylinder and the internal thread of the inner peripheral surface of the outer cylinder facing the inner cylinder. There arises a problem that the cleaning between the inner cylinder and the outer cylinder becomes insufficient.

In view of the circumstances described above, the present invention includes a connector connected to one end of a supply tube, and a cleaning port to which the connector is connected at the time of cleaning and a cleaning liquid is supplied to the cleaning tube. In the cleaning system in which the cleaning liquid is supplied to the cleaning port by supplying the cleaning liquid to the cleaning port in a state where the connector is connected, and the connector and the supply tube are cleaned through the cleaning port. ,
The connector is formed with an inner cylinder that is connected to one end of the supply tube and communicates with the inside of the cleaning port during cleaning, and an internal thread that surrounds the inner cylinder and communicates with the cleaning port during cleaning. And a gap formed between the outer peripheral surface of the inner cylinder and the female screw of the outer cylinder, and the outer cylinder communicates with the gap and the outside of the outer cylinder. Provide a through hole for cleaning,
At the time of cleaning, the cleaning liquid supplied to the cleaning port is circulated through the gap and the through hole to clean between the outer peripheral surface of the inner cylinder and the female screw of the outer cylinder. .

  According to such a structure, since the through hole for cleaning is provided in the outer cylinder, the cleaning liquid flows between the inner cylinder and the outer cylinder at the time of cleaning, and the cleaning liquid is provided between the inner cylinder and the outer cylinder. Can be reliably cleaned. Therefore, in a dialysis apparatus having a washing port, even when a male luer connector is used at the tip of the supply tube, the internal thread of the inner surface of the outer cylinder in the male luer connector can be sufficiently washed. Therefore, it is possible to provide a cleaning system that is easy to attach and detach and easy to clean.

The front view which shows one Example of this invention. The figure which shows the circuit structure of the principal part of FIG. FIG. 3A is a front view of the main part of FIG. 1, FIG. 3A shows a state where the lid 11B is opened, and FIG. 3B shows a state where the lid 11B is closed. The longitudinal cross-sectional view of the principal part of FIG. FIG. 5 is a perspective cross-sectional view of the main part of FIG. 4. The perspective view of the principal part of FIG. The enlarged view of the principal part of FIG.

Hereinafter, the present invention will be described with reference to the illustrated embodiments. In FIGS. 1 and 2, a dialysis apparatus 1 for performing dialysis treatment on a patient accommodates components such as a dialysate circuit 2 and a blood circuit 3 therein. Main body 4 and dialyzer 5 held by holder 4A of main body 4 during dialysis treatment.
The dialyzer 1 has a first supply tube 7 having one end 7A connected to the liquid supply passage 2A of the dialysate circuit 2 and the male luer connector 6 attached to the other end 7B, and one end 8A having the liquid supply passage. A second supply tube 8 connected to 2A and connected to the other end 8B with a connector 6 'and a first cleaning port provided in parallel to the front of the main body 2 and connected to the male luer connector 6 during cleaning 11 and the second cleaning port 12 to which the connector 6 'is connected.

The configurations of the dialysate circuit 2, the blood circuit 3, and the dialyzer 5 are known, for example, from Japanese Patent Application Laid-Open No. 2012-191992, and a detailed description thereof is omitted here.
The first supply tube 7 serves as a supply passage for supplying the dialysate stock solution A to the dialysate circuit 2, and a pump P <b> 1 is provided in the middle of the first supply tube 7. On the other hand, the second supply tube 8 serves as a supply passage for supplying the dialysate stock solution B to the dialysate circuit 2, and a pump P <b> 2 is provided in the middle of the second supply tube 8.
When a dialysis treatment is performed on a patient by the dialyzer 1, the dialyzer 5 is attached to the holder 4A in advance, and the end of the dialysate supply passage 2B of the dialysate circuit 2 and the dialysate recovery passage 2C are connected to the dialyzer 5. The ends of are connected. Further, one end of the artery side passage 3A and one end of the vein side passage 3B of the blood circuit 3 are connected to the dialyzer 5.
Further, as shown in FIG. 1, the male luer connector 6 of the first supply tube 7 and the threaded portion at the tip of the tube 13A of the soft bag 13 containing the dialysis stock solution (A stock solution) are connected, and the second supply tube 8 connector 6 'is connected to a tank 14 containing a dialysis stock solution (B stock solution), and nozzle 6A' of connector 6 'is inserted into B stock solution. And in the state which the pump etc. which are not illustrated of the dialysate circuit 2 act | operate, and the water has distribute | circulated in the liquid supply channel | path 2A, both pumps P1 and P2 are actuated, A stock solution in the soft bag 13 is While being supplied into the liquid supply passage 2 </ b> A through the first supply tube 7, the B stock solution in the tank 14 is supplied into the liquid supply passage 2 </ b> A through the second supply tube 8. The A stock solution and B stock solution supplied into the liquid supply passage 2A are then mixed in the dialysate circuit 2 to create a dialysate.
And after the dialysate prepared in the dialysate circuit 2 is supplied to the dialyzer 5 from the dialysate supply passage 2B, it is recovered through the dialysate recovery passage 2C. The blood in the blood circuit 3 connected to the dialyzer 5 is purified by the dialysate. In this way, dialysis treatment is performed on the patient by the dialysis machine 1.

As described above, dialysis treatment is performed on the patient by the dialysis device 1. However, since the dialysis device 1 is repeatedly used, it is necessary to wash the dialysate circuit 2 before starting each dialysis treatment. In this case, it is necessary to clean the first supply tube 7 and the second supply tube 8 and the male luer connector 6 and the connector 6 'provided on them.
Therefore, the dialysis apparatus 1 of the present embodiment includes the first washing port 11 and the second washing port 12 on the front surface of the main body 4 in order to wash both the supply tubes 7 and 8, the male luer connector 6 and the connector 6 ′. Provided. As shown in FIG. 2, when the dialysate circuit 2 is washed, the male luer connector 6 of the first supply tube 7 is connected to the first washing port 11, and the connector 6 ′ of the second supply tube 8 is connected to the first. 2 is connected to the washing port 12.
In the present embodiment, a first cleaning passage 17 and a second cleaning passage 18 are provided for cleaning both the supply tubes 7 and 8, the male luer connector 6, and the connector 6 ′. One end 17 </ b> A of the first washing passage 17 is connected to the liquid supply passage 2 </ b> A of the dialysate circuit 2. The other end of the first cleaning passage 17 is branched into two, one end 17B branched is connected to the first cleaning port 11, and the other branched end 17C is second cleaned. It is connected to port 12. A normally closed electromagnetic valve V4 is provided in the middle of the first cleaning passage 17, and this electromagnetic valve V4 is opened during cleaning.
One end 18 </ b> A of the second washing passage 18 is connected to a drainage passage (not shown) of the dialysate circuit 2. The other end of the second cleaning passage 18 is branched into two, one branched end 18B is connected to the vicinity of the opening of the first cleaning port 11, and the other branched end 18C is connected. The second cleaning port 12 is connected near the opening. Further, a normally closed electromagnetic on-off valve V1 is provided in the middle of the second cleaning passage 18, and a normally closed electromagnetic on-off valve V2 is provided between the branch point and the one end 18B and between the branch point and the other end 18C. , V3 is provided.

When the dialysate circuit 2 is washed, the end of the dialysate supply passage 2B and the dialysate recovery passage 2C are removed from the dialyzer 5 as shown by the dotted line in FIG. Are connected to each other. The male luer connector 6 of the first supply tube 7 is connected to the first cleaning port 11, and the connector 6 ′ of the second supply tube 8 is connected to the second cleaning port 12.
When the dialysate circuit 2 is washed, the wash fluid flows in the dialysate passage 2 and the electromagnetic on-off valve V4 is opened. Therefore, both washings are performed via the first washing passage 17 communicating with the liquid supply circuit 2A of the dialysate passage 2. The cleaning liquid is supplied to the ports 11 and 12. The cleaning liquid supplied to both the cleaning ports 11 and 12 flows through the male luer connector 6 and the first supply tube 7 and returns to the liquid supply passage 2A, and flows through the connector 6 ′ and the second supply tube 8 to be supplied. It returns to the liquid passage 2A. Moreover, the male on / off connector 6 and the connector 6 are opened by stopping the pumps P1 and P2 and stopping the supply tubes 7 and 8 and opening the electromagnetic on-off valves V1 to V3 of the second cleaning passage 18 at an appropriate timing. The cleaning liquid flowing through the inside can be discharged through the second cleaning passage 18. Thereby, both supply tubes 7 and 8 and male luer connectors 6 and 6 'can be washed.

Thus, in this embodiment, the male luer connector 6 is used as the connector of the first supply tube 7, and the receiving portion 26 of the male luer connector 6 is provided in the first cleaning port 11, so that attachment / detachment work at the time of cleaning is performed. The male luer connector 6 itself can be sufficiently cleaned.
As shown in FIGS. 3 to 7, a stepped cylindrical first cleaning port 11 is formed at the center of the front of the main body 4 in the height direction, with the opening 11 </ b> A positioned in the front. The end of the first cleaning port 11 is connected to the end 17 </ b> B of the first cleaning passage 17 via a coupling 22. The opening 11A of the first cleaning port 11 is opened and closed by a lid 11B that can be opened and closed. The opening 11A is closed by the lid 11B except during cleaning.
Engagement holes 11C, in which square holes are continuously provided at two locations in the circumferential direction, are formed at adjacent inner positions of the opening 11A, and the adjacent inner positions of the engagement holes 11C are the same as the large-diameter portion 11D. It has become. Further, an intermediate diameter portion 11E is formed at an adjacent inner position of the large diameter portion 11D, and a tapered portion 11F having a gradually smaller diameter at the inner side is formed at the adjacent inner position. A small-diameter portion 11G is formed at an inner position adjacent to the tapered portion 11F.
An annular collar 23A having elasticity is fixed to the inner end surface of the large diameter portion 11D, and a cylindrical packing 23B having elasticity is fixed to the inner peripheral surface of the middle diameter portion 11E. As shown in FIG. 4, when the male luer connector 6 is fitted to the washing port 11, the male luer connector 6 is moved to the first washing port 11 (large diameter portion 11D) by the elastic force of the collar 23A and the packing 23B. In addition, the liquid-tightness between the medium-diameter portion 11E) and the medium-diameter portion 11E) is firmly held.
A proximity switch 24 for detecting magnetic force is provided on the outer peripheral portion of the large-diameter portion 11D. When the male luer connector 6 is securely fitted to the first cleaning port 11, as shown in FIG. The magnetic force of the 6-side magnet 25 is detected. When the proximity switch 24 detects the magnetic force of the magnet 25, the male luer connector 6 is fitted into the first cleaning port 11, and it can be confirmed that both are connected correctly.
In this embodiment, the engaging hole 11C, the large diameter portion 11D, the medium diameter portion 11E, the collar 23A and the packing 23B in the first cleaning port 11 constitute a receiving portion receiving portion 26 of the male luer connector. The internal space of the tapered portion 11F and the small diameter portion 11G is a cleaning chamber 27. Further, a drainage port 11H projects from the outer peripheral surface of the tapered portion 11F constituting the cleaning chamber 27, and the end 18B of the second cleaning liquid passage 18 is connected to the drainage port 11H.

Next, the male luer connector 6 attached to the other end 7B of the first supply tube 7 will be described. The male luer connector 6 includes an inner cylinder 31 positioned closest to the axial center, an outer cylinder 32 integrally formed with the inner cylinder 31 on the outer peripheral portion on one end side (tip side) of the inner cylinder 31 in the axial direction, A stepped cylindrical lock member 33 provided so as to cover a part of the outer peripheral surface of the cylinder 31 and the outer cylinder 32 is provided.
The lock member 33 includes a large-diameter flange portion 33A formed at a substantially central portion in the axial direction, a small-diameter portion 33B located on the tip side (right side in the drawing) of the large-diameter flange portion 33A, and the small-diameter portion. A small-diameter flange portion 33C formed at the center in the axial direction of the portion 33B and a gripping portion 33D having a hollow interior continuously from the large-diameter flange portion 33A are provided.
The inner cylinder 31 is formed in an elongated cylindrical shape.
On the other hand, the outer cylinder 32 surrounds the inner cylinder 31 and is formed integrally with the inner cylinder 31, and the axial length of the outer cylinder 32 is less than or equal to half the axial length of the inner cylinder 31. . The inner peripheral surface on the distal end side (right side) of the outer cylinder has an annular recess 32A with a larger inner diameter than the other end side. A female thread 32B is formed over substantially the entire inner peripheral surface of the annular recess 32A.
On the other hand, the inner peripheral surface on the distal end side of the small-diameter portion 33B in the lock member 33 is an annular recess 33E, and substantially half of the outer peripheral surface of the outer cylinder 32 is fitted therein, and at the same time the left side of the inner cylinder 31 The region on the side passes through the small diameter portion 33B of the lock member 33 and is positioned in the internal space of the grip portion 33D. Since the stopper 35 is locked to the outer peripheral portion of the inner cylinder 31 in the gripping portion 33 </ b> D, the inner cylinder 31 and the outer cylinder 32 cannot move in the axial direction with respect to the lock member 33. An annular seal member 36 is attached to the outer peripheral portion of the outer cylinder 32, and the seal member 36 maintains liquid tightness between the outer peripheral surface of the outer cylinder 32 and the inner peripheral surface of the annular recess 33 </ b> E of the lock member 33. ing.

The outer cylinder 32 is in a state in which the outer peripheral surface on the distal end side (right side) with respect to the central portion in the axial direction is exposed outward from the lock member 33, and the outer cylinder 32 is disposed on the inner side of the outer cylinder 32. The tip of the inner cylinder 31 is also in a state of protruding outward from the lock member 33, as with the outer cylinder 32. On the other hand, the end portion 7B of the first supply tube 7 is connected to the end portion of the inner cylinder 31 located in the gripping portion 33D.
A cylindrical gap 32C is formed between the annular recess 32A and the female screw 32B of the outer cylinder 32 and the outer peripheral surface of the inner cylinder 31 facing them. The male luer connector 6 and the tube 13 </ b> A of the soft bag 13 can be connected by screwing a screw portion formed at the tip of the tube 13 </ b> A of the soft bag 13 with the female screw 32 </ b> B of the outer cylinder 32. .

  Further, in the outer cylinder 32 of the present embodiment, a plurality of radial through holes 32D are formed at adjacent positions where the female screw 32B is interrupted so as to communicate with the gap 32C. The cleaning through holes 32D are formed at four positions at equal intervals in the circumferential direction. As described above, the gap 32C is maintained between the internal thread 32B of the outer cylinder 32 and the outer peripheral surface of the inner cylinder 31 facing the annular recess 32A. In this embodiment, however, the gap 32C communicates with the gap 32C. Thus, a through-hole 32D for cleaning is formed in the outer cylinder 32. Since the plurality of through-holes 32D for cleaning are formed, in this embodiment, the cleaning liquid can flow through the gap 32C. The outer surface of the female screw 32B repeatedly attached and detached and the inner cylinder 31 opposed thereto can be cleaned.

  On the other hand, two portions in the circumferential direction of the small-diameter flange 33C of the lock member 33 are projecting portions 33F projecting as a three-dimensional shape, whereby the contour of the small-diameter flange portion 33C is the engagement hole 11C shown in FIG. It has a shape that matches. Further, the magnet 25 is housed inside one overhanging portion 33F of the small diameter flange portion 33C. Furthermore, the inner peripheral edge of the distal end of the lock member 33, that is, the inner peripheral edge of the small diameter portion 33B is a tapered surface 33G having a gradually increasing diameter on the opening side (end portion) side. The tapered surface 33G is in a state of covering the plurality of cleaning through holes 32B from the outside in the radial direction. The presence of the tapered surface 33G makes it easy to guide the cleaning liquid flowing out through the through hole 32D to the discharge port 11H.

The male luer connector 6 configured as described above is connected to the first cleaning port as follows before starting the cleaning operation. That is, as shown in FIG. 3A, after opening the lid 11B of the first cleaning port 11, the male luer connector 6 of the first supply tube 7 is inclined 45 ° counterclockwise with respect to the vertical direction. The small-diameter flange portion 33C and the overhang portion 33F are inserted through the engaging hole 11C, and then the entire male connector 6 is rotated 45 ° clockwise. As a result, as shown in FIGS. 4 to 7, the small-diameter flange portion 33C contacts the collar 23A, and the overhang portion 33F contacts the left end surface of the large-diameter portion 11D. Further, the outer peripheral surface of the small diameter portion 33B is brought into close contact with the cylindrical packing 23B, and the liquid tightness of the portion is maintained. In this way, the male luer connector 6 is connected to the first cleaning port 11. And it can be confirmed that the proximity switch 24 has detected the magnetic force of the magnet 25 that both were connected reliably.
When the male luer connector 6 is thus connected to the first cleaning port 11, the tips of the outer cylinder 32, the inner cylinder 31, and the small diameter portion 33 </ b> B of the lock member 33 on the male luer connector 6 side are located in the cleaning chamber 27. The gap 32C at the location of the female screw 32B is also in communication with the cleaning chamber 27. Further, the four cleaning through holes 32D and the tapered surface 33G are located at positions where they overlap with the opening on the inner side of the discharge port 11H.
Note that the configuration of the connector 6 ′ of the second supply tube 8 in this embodiment is the same as that of the male luer connector 6, and the configuration of the second cleaning port 12 is also the same as that of the first cleaning port 11. Has been. That is, the second cleaning port 12 is formed with a cylindrical space portion into which the connector 6 ′ can be fitted, and the space portion serves as a cleaning chamber. The end 17C of the first cleaning passage 17 is connected to the end of the cleaning chamber (see FIG. 2). A discharge port similar to the discharge port 11H of the first cleaning port 11 is formed in the vicinity of the opening of the second cleaning port 12, and the end 18C of the second cleaning passage 18 is connected to the discharge port. (See FIG. 2). The connector 6 ′ of the second supply tube 8 is also connected to the second cleaning port 12 before starting the cleaning operation.

While the male luer connector 6 on the first supply tube 7 side is connected to the first washing port 11 and the connector 6 ′ on the second supply tube 8 side is connected as described above, When cleaning is started, the electromagnetic on-off valve V4 of the first cleaning passage 17 is opened. Accordingly, since the cleaning liquid is supplied to both the cleaning ports 11 and 12 through the first cleaning passage 17, both the supply tubes 7 and 8 are cleaned.
More specifically, cleaning of both the supply tubes 7 and 8 and the male luer connector 6 and the connector 6 'is performed in the following order. At the start of cleaning, the electromagnetic on-off valves V1 to V3 of the second cleaning passage 18 are closed, so that the cleaning liquid supplied into the cleaning chamber 27 of the first cleaning port 11 is as shown in FIG. After flowing through the inside of the inner cylinder 31 and then flowing through the first supply tube 7, it is returned to the dialysate circuit 2. In this way, the inner cylinder 31 and the inside of the first supply tube 7 are first cleaned with the cleaning liquid. Similarly, the connector 6 ′ and the second supply tube 8 connected to the second cleaning port 12 are cleaned with the cleaning liquid.
When the required time has elapsed since the start of cleaning, the pumps P1 and P2 are stopped and the electromagnetic on-off valves V1 to V3 of the second cleaning passage 18 are opened for a predetermined time. Therefore, as shown in FIG. 2, the cleaning liquid supplied into the cleaning chamber 27 of the first cleaning port 11 circulates through the clearance 32C between the inner cylinder 31 and the female screw 32B and the cleaning through hole 32D communicating therewith, Further, after being guided by the taper portion 33G, it is discharged through the second cleaning passage 18 through the discharge port 11H. As described above, the cleaning liquid flows through the gap 32C, so that the female screw 32B and the outer peripheral surface of the inner cylinder 31 opposed thereto can be reliably cleaned with the cleaning liquid. The same applies to the connector 6 ′ on the second cleaning port 12 side. When the washing operation of the dialysis circuit 2 and the two supply tubes 7 and 8 is completed as described above, the electromagnetic on-off valves V1 to V4 are closed.
When the male luer connector 6 is removed from the first cleaning port 11 after the cleaning operation is completed, the operation is the reverse of the above-described attachment. The same applies to the case where the connector 6 ′ is removed from the second cleaning port 12.

As described above, in the present embodiment, the male luer connector 6 is employed as the connector of the first supply tube 7, while the first cleaning port 11 serves as a receiving portion 26 to which the male luer connector is attached and detached. ing. Therefore, the attachment / detachment work of the male luer connector 6 and the receiving part 26 accompanying the cleaning work is easy.
Further, in the present embodiment, since a plurality of through holes 32D for cleaning are provided in the outer cylinder 32 of the male luer connector 6, the outer threads of the outer cylinder 32 and the outer peripheral portion of the inner cylinder 31 opposed thereto are washed with liquid. Can be reliably cleaned. Therefore, according to the present embodiment, it is possible to provide a cleaning system that is easy to attach and detach and easy to clean.

In the above embodiment, as shown in FIG. 2, the end 17B of the first cleaning passage 17 is connected to the first cleaning port 11, but the end of the first cleaning passage 17 is connected to the first cleaning port 11. The portion 17B may not be connected. In this case, after cleaning fluid flows from the dialysate circuit 2 through the first supply tube 7 and the male luer connector 6 by opening the electromagnetic on-off valves V1 and V2 of the second cleaning passage 18 during cleaning. Then, it is discharged to the outside through the second cleaning liquid passage 18. Thereby, the 1st supply tube 7 and the male luer connector 6 can be wash | cleaned reliably for that reason.
Moreover, although the said Example has applied this invention to the washing | cleaning system of the dialysis apparatus 1, this invention can be applied also to the connection location of one and the other fluid channel | path in apparatuses other than a dialysis apparatus.

DESCRIPTION OF SYMBOLS 1 ... Dialysis machine 2 ... Dialysate circuit 3 ... Blood circuit 6 ... Male luer connector 7 ... 1st supply tube 11 ... 1st washing port 13 ... Soft bag 17 ... 1st washing passage 27 ... Washing chamber 31 ... Inner cylinder 32 ... Outer cylinder 32A ... Annular recess 32B ... Female thread 32C ... Clearance 32D ... Through hole

Claims (4)

A connector connected to one end of the supply tube; and a cleaning port to which the connector is connected at the time of cleaning and to which cleaning liquid is supplied, and the connector is connected to the cleaning port at the time of cleaning. In the cleaning system in which the cleaning liquid is supplied to the connector and the supply tube through the cleaning port, thereby cleaning the connector and the supply tube.
The connector is formed with an inner cylinder that is connected to one end of the supply tube and communicates with the inside of the cleaning port during cleaning, and an internal thread that surrounds the inner cylinder and communicates with the cleaning port during cleaning. And a gap formed between the outer peripheral surface of the inner cylinder and the female screw of the outer cylinder, and the outer cylinder communicates with the gap and the outside of the outer cylinder. Provide a through hole for cleaning,
At the time of cleaning, the cleaning system is characterized in that the cleaning liquid supplied to the cleaning port is circulated through the gap and the through-hole to clean the space between the outer peripheral surface of the inner cylinder and the female screw of the outer cylinder.   The outer cylinder is provided with an annular recess on the side facing the cleaning port, the female thread is formed in the annular recess, and a plurality of the through holes are provided at locations where the female thread is not formed in the annular recess. The cleaning system according to claim 1, wherein   The cleaning port is formed with a drainage port in which an opening on the inner side overlaps with the cleaning through-hole, and a part of the cleaning liquid flowing through the gap and the through-hole is removed from the drainage port. The cleaning system according to claim 2, wherein the cleaning system is discharged to the outside of the cleaning port.   The other end of the supply tube is connected to the dialysate circuit of the dialyzer, and the screw portion at the tip of the tube of the dialysate stock solution container is screwed into the female screw of the connector, so that The dialysate stock solution is supplied to the dialysate circuit, and when the dialysate circuit is washed, the wash solution supplied to the dialysate circuit is supplied to the wash port via the wash passage. The cleaning system according to any one of claims 1 to 3, wherein:

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