JPH02258030A - Water removing apparatus for fluid separator - Google Patents

Abstract

PURPOSE:To maintain water removing accuracy by a method wherein treating amounts of each of two containers for dialyzing liq. is made different from each other, and a water replenishing means is provided which supplies the required water to the container in connection with a used dialyzing liq. opening based on differences in their treating amt. in order to adjust the water removing amt. CONSTITUTION:A fluid separator 1 for causing contact between untreated liq. and dialyzing liq. to take place through a semipermeable membrane is arranged at its dialyzing liq. inlet opening 4, and used dialyzing liq. opening 5 of a container with their respective dialyzing liq. containers A and B divided by a movable separating wall 8 is connected to a used dialyzing liquid opening 5 of the separator 1. Each of the containers A and B is given a different treating amt. A water replenishing means 15 is connected with the container B and, based on differences in their treating amt., it supplies water to the container B to make the water removing amt. changeable. As a result, the water removing accuracy can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water removal device in a separation device that separates liquid using a permeable semipermeable membrane.

[Conventional technology]

It has been known for some time to separate liquids using permeable thin membranes. And these liquid separators are
For example, as seen in Japanese Patent Publication No. 56-82, a fluid to be treated is supplied from a permeable thin film, a chamber to be treated, and a dialysis chamber to the fluid chamber to be treated in the main body of a fluid separation device, and ultrafiltration and The dialysis treatment is performed and the fluid to be treated is discharged from the outlet. The dialysate is supplied by separating the dialysate container into two chambers by a partition such as a piston, and one chamber is provided with a dialysate inlet and a dialysate outlet, and the dialysate inlet is used to supply the dialysate. The dialysate outlet is connected to the dialysate inlet of the liquid separator main body. Further, the other chambers are provided with a used dialysate inlet connected to the dialysate outlet of the liquid separation device main body, and a used dialysate outlet connected to the discharge section.

One more dialysate container having the same configuration as above is prepared, and these two dialysate containers are operated alternately. Regarding water removal, water is removed from the used dialysate while being measured using a measuring container using an ultrafiltration pump, or a preset amount is removed using a metering pump. .

[Problem to be solved by the invention]

When using the above-mentioned water removal means, the used dialysate is removed by the water removal pump, so there is a problem that dirt accumulates on the water removal pump and the water removal accuracy decreases.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems and provide a water removal device that can vary the amount of water removed.

[Means to solve the problem]

In order to achieve the above object, the water removal device in the fluid separation device according to the present invention is movable at the dialysate inlet of the fluid separation device that brings the liquid to be treated and the dialysate into contact via a permeable semipermeable membrane. One of the dialysate containers divided into two containers is connected by a partition wall, and the other container is connected to the used dialysate port of the fluid separation device to create a difference in the throughput of both containers, and to reduce the amount of used dialysate. A water replenishment means is connected to the container connected to the used dialysis fluid port, and the amount of water removed can be varied by replenishing water from the water replenishment means to the container connected to the used dialysis fluid port based on the difference in throughput between the two containers. It is characterized by what it has done.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a first embodiment, and in FIG. 1, 1 is separated by a permeable thin film in the longitudinal direction thereof, and includes a fluid chamber to be treated, into which a fluid to be treated flows from a fluid to be treated chamber 3, and a dialysis chamber. This is a fluid separation device consisting of a dialysate chamber to which dialysate is supplied from the fluid separation device 1, the fluid to be treated is supplied from the fluid to be treated 3 of the fluid separation device 1, and the dialysis treatment is received from the fluid to be treated outlet 2. taken out. Further, the used dialysate is taken out from the dialysate outlet 5.

Reference numeral 6 denotes a dialysate container comprising a dialysate supply container A and a used fluid discharge container B, which are fluid-tightly partitioned by a movable partition wall 8 that is movable by a piston shaft 7. It constitutes a metering pump that operates a piston shaft connected to a movable partition wall 8 in the left and right directions. One dialysate supply container A of the dialysate containers 6 described above is connected to the dialysate port 4 of the fluid separation device 1 through a supply line IO, and the other used fluid discharge container B of the dialysate container 6 is connected to the dialysate supply port 4 of the fluid separation device 1. One of the dialysate supply containers A of the dialysate containers 6 which are connected to the dialysate outlet 5 of the separation bag 21 through the outflow line 11 and further connected to the dialysate port 4 of the fluid separation device 1 described above has a movable partition wall 8 . The overall capacity is smaller than that of the other used liquid discharge container B by a capacity corresponding to the shaft diameter of the piston shaft 7 that operates the .

13 is a container A for supplying dialysis fluid to the container A described above.
14 is a discharge line for discharging the used solution from the used solution discharge container B, and 10' and 11' are lines connected to the supply line 10 and the outflow line 11 described above. It is a check valve equipped with 9
, 12 are the fresh liquid supply line 13 and discharge line 1 described above.
This is a check valve installed at 4.

Reference numeral 15 denotes a pump for adjusting the amount of water removed, and the pump 15 for adjusting the amount of water removed is configured to be able to directly inject replenishing water into the main body of the used liquid discharge container B through the replenishing water supply pipe 16, and adjusts the amount of water removed f as described above. As the pump 15, a commonly used metering pump can be used.

Reference numeral 40 denotes a water supply line for the water removal amount adjustment pump 15, and the water removal amount adjustment pump 1 is connected to the water removal amount adjustment pump 1 by the water supply line 40.
Dialysis fluid or tap water is also supplied to the patient. 41
is a valve installed in the water supply line 40. Also, 4
3 is a used dialysate line connecting the discharge line 14 connected to the used liquid discharge container B and the downstream side of the valve 41 of the water supply line 40; 42 is the used dialysate line 43; This is a valve installed in the

Since the present first embodiment is configured as described above, for example, the fluid to be dialyzed is supplied to the fluid chamber to be treated of the fluid separation device 1, and the dialysate is supplied from the dialysis room population 4. ,
Two chambers A and B of the dialysate container 6 are filled with dialysate, and if the movable partition wall 8 of the dialysate container 6 is moved to the right side of the chamber by the piston shaft 7, the fresh dialysis fluid is supplied. The dialysate is sucked into the dialysate supply container A through the check valve 9 provided in the pipe 13. At this time, the check valve 10' disposed in the supply line 10 is closed. Further, the liquid in the used liquid discharge container B passes through the check valve 12 provided in the discharge line 14 and is discharged from the discharge line 14.

On the other hand, the used dialysate is discharged from the dialysate outlet 5, but in this discharge as well, the movable partition wall 8 moves to the left as the movable partition wall 8 of the dialysate container 6 moves. is sucked into the used liquid discharge container B through the check valve 11' provided in the outflow line 1. During this suction, the check valve 12 disposed in the discharge line 14 is closed.

By the way, in this embodiment, as described above, the dialysate supply container A and the used fluid discharge container B have different volumes, and the used fluid discharge container B is used as the dialysate supply container B.
Since the volume is larger, if the movable partition wall 8 of the dialysate container 6 is reciprocated at the same speed, the used fluid processed in the used fluid discharge container B will be transferred to the dialysate supply. Container A
It will always be a certain amount more than the amount supplied.

For example, in artificial dialysis used for blood purification, the amount of water removed varies from person to person, so it is necessary to constantly vary the amount of water removed. However, in this example,
As mentioned above, the amount of water treated in the used fluid discharge container B is a certain amount larger than the amount of fresh dialysis fluid supplied from the dialysate container A, so the amount of water removed is It can be seen as the amount of difference obtained by subtracting the amount supplied by dialysate supply container A from the amount treated in B.

Therefore, if supplementary water is injected into the used liquid discharge container B from the pump 15 for adjusting the amount of water removed, the amount of water removed will be:
This is the amount obtained by subtracting the water replenishment amount from the above difference amount. Now, the supply amount from dialysate supply container A is V Ace/win,
The discharge amount of the used liquid discharged from the used liquid discharge container B is VBcc/min, and the amount of replenishing water injected into the used liquid discharge container B by the water removal amount adjusting pump 15 is V Mcc/mi.
If n, water removal amount = (V Bcc/win -V
Acc/m1n) -V MCc/min. In this embodiment, V Bcc/win -V
Since Acc/min is kept constant, the amount of water removed can be adjusted by varying the injection amount VMcc/in from the pump 15 for adjusting the amount of water removed. This makes it possible to respond accordingly.

Then, the dialysate supply container A is, for example, 500 cc.
/win, used liquid discharge container B at 550cc/si
n, and the amount injected by the water removal amount adjustment pump 15 is Mcc.
/win, in the above example, the amount of water removed can be variably adjusted from 50 cc/rain to 0 by variable injection of (B-A)-M, that is, the value of M from 0 to 50 cc/a+in.

When replenishing water with the water removal amount adjustment pump 15 described above, the supply water line 4 of the water removal amount adjustment pump 15 is the same as the supply water line 4 when supplying dialysate or tap water.
Normally, the valve 41 installed at the dialysate line 43 is opened, the valve 42 installed at the used dialysate line 43 is closed, and the above-mentioned new rehydration solution is supplied to the pump 15 for adjusting the amount of water removed. ,
Depending on the hospital facility, tap water etc. may not be provided near the device, so the valve 41 installed in the water supply line 40 is closed, and the valve 42 installed in the used dialysate line 43 is closed. It is also possible to open the drain and use the waste water from the used dialysate line 43. Also, by using the waste water, the dialysate, etc. It is possible to reduce waste.

In the embodiment described above, the volumes of the dialysate supply container A and the used fluid discharge container are different, and both containers A and B are different in volume.
By reciprocating the movable partition wall 8 that partitions the containers with the piston shaft 7, a difference between the supply amount and the discharge amount of both containers A and H is created. In addition, by using means such as changing the moving speed of the movable partition wall, it is possible to provide a difference in the throughput between the dialysate supply container A and the used fluid discharge container B.

Next, the second embodiment of the present invention will be explained based on FIG. 2. In FIG. 2, the same or equivalent parts as those of the first embodiment shown in FIG. It shows.

In FIG. 2, 8' is a flexible membrane provided in the dialysate container 6, which divides the dialysate container 6 into a dialysate supply container A and a used fluid discharge container B; The flexible membrane 8
The containers A and B, which are partitioned by ', are set in advance so that the capacity A<B.

20 is a pump that applies pressure to the new dialysis solution installed in the new dialysis solution supply pipe 13; 21 is the used solution outflow line 1;
This is a suction pump installed in 1.

In the second embodiment, as described above, the fresh dialysis fluid is supplied under pressure into the dialysate supply container A by using the pump 20 disposed in the new dialysis fluid supply pipe 13, and this pressure The flexible membrane 8' is displaced by the new dialysis solution supplied with the
Drain the used liquid in the used liquid discharge container B, and then
The used dialysate is applied pressure from the dialysate outlet 5 by the pump 21 disposed in the outflow line 11 and flows into the used liquid discharge container B, and the pressure of the used dialysate causes the flexible membrane 8' is pressed in an inverted state to feed the fresh dialysis fluid in the dialysate supply container A to the supply line 10 and supply it to the fluid separation device 1. In this way, supply and discharge are performed by alternately displacing the flexible membrane 8'.

〔Effect of the invention〕

In the water removal device in the fluid separation device according to the present invention, one of the dialysate containers divided into two containers by a movable partition is connected to the dialysate inlet of the fluid separation device, and the other container is connected to the dialysate inlet of the fluid separation device. The amount of water removed is determined by connecting the used dialysate port to the used dialysate port, setting a difference in the throughput of both containers, and replenishing the container connected to the used dialysate port with water as required based on the difference in the throughput amount. Since the adjustment is made, it is possible to use dialysate or the like as the water replenishment means, and the adjustment pump, etc., which is the water replenishment means, does not become contaminated, so that accuracy can be maintained. Further, since the adjustment pump described above may be a minute pump, the accuracy can be easily selected.

In addition, in order to cope with long-term dialysis, it is possible to replenish water with used dialysate, and if the pump for adjusting the amount of water removed becomes dirty, it can be replaced with fresh dialysis fluid or tap water and the water can be replaced even during dialysis. The pump for adjusting the amount of water can be cleaned, and from this point of view as well, the accuracy of water removal can be maintained.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a schematic explanatory diagram of the first embodiment, and FIG. 2 is a schematic explanatory diagram of the second embodiment. 1: Fluid separation device 4: Dialysate population 5: Dialysate outlet 6: Dialysate container 8.8': Movable partition wall 15: Water removal amount adjustment pump A: Dialysate supply container B: Spent fluid discharge container No. Figure 1

Claims (1)

[Claims] One of the dialysate containers divided into two containers is connected by a movable partition to the dialysate inlet of a fluid separation device that brings the liquid to be treated and the dialysate into contact through a permeable semipermeable membrane, and the other container is is connected to the used dialysate port of the fluid separation device to provide a difference in the throughput of both containers, and a water replenishment means is connected to the container connected to the used dialysate port, and the treatment of both containers is A water removal device in a fluid separation device, characterized in that the amount of water removed can be varied by replenishing water from the water replenishing means to a container connected to a used dialysis port based on the difference in amount.