JP2014184064A - Dialysis fluid feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect contact of antiseptic solution with acid cleaning solution certainly inexpensively.SOLUTION: In an antiseptic solution washing mode, a control device stops operation of a dialysis fluid feeding device when an acid cleaning solution line detection sensor S2 detects that there is no air in an acid cleaning solution line L22. In an acid cleaning mode, the control device stops operation of the dialysis fluid feeding device when an antiseptic solution line detection sensor S1 detects that there is no air in an antiseptic solution line L21.

Description

  The present invention relates to a dialysate supply apparatus that supplies dialysate necessary for performing dialysis treatment.

  In general, hemodialyzers can be broadly classified into personal dialyzer and dialysis monitoring device.

  The personal dialysis machine produces dialysate by mixing A stock solution and B stock solution, which are the dialysate stock solution, with RO water at a certain ratio in the device, while the dialysis monitoring device is a dialysis for multi-person use. The dialysis is performed by receiving the dialysis fluid supplied from the liquid supply device. Dialysis monitoring devices are also called consoles. For example, many dialysis monitoring devices are often introduced in dialysis centers and large hospitals.

  As a dialysate supply device for supplying dialysate to a dialysis monitoring device, for example, one disclosed in Patent Document 1 is known. The dialysate supply apparatus includes an A stock solution tank, a B stock solution tank, a dialysate storage tank, and a dialysate feed pump. And after mixing A stock solution and B stock solution with RO water supplied from a water supply source, dialysate is generated, stored in a storage tank, and sent to each dialysis monitoring device by a feed pump. Yes.

  Moreover, the dialysate supply apparatus needs to perform piping washing regularly. There are two types of pipe cleaning: disinfectant cleaning using a disinfectant and acid cleaning using an acid cleaning liquid. Normally, disinfecting liquid cleaning is performed once a day, and acid cleaning is performed by depositing calcium carbonate or the like in the pipe. Performed when an object is deposited.

  The chemical solution used in the disinfectant cleaning is, for example, sodium hypochlorite, and the chemical solution used in the acid cleaning is acetic acid. On the other hand, the piping to be cleaned is the same for disinfectant cleaning and acid cleaning.

  In such a configuration, in the unlikely event that a valve or the like fails, it is assumed that the disinfecting solution and the acid cleaning solution are supplied to the same pipe at the same time, which may cause a chemical reaction.

  On the other hand, for example, in Patent Document 1, conductivity detection means is provided to detect the conductivity of the liquid in the pipe, and contact between the disinfecting solution and the acid cleaning solution is detected based on the conductivity. Suppresses the reaction from occurring.

Japanese Patent No. 3971659

  However, the electrical conductivity detection means of Patent Document 1 has a problem that it is expensive.

  Further, the change in the electrical conductivity of the liquid in the pipe does not change unless the disinfecting liquid and the acid cleaning liquid are in contact with each other. That is, there is also a problem that contact between the disinfecting solution and the acid cleaning solution can be detected only after a chemical reaction has occurred.

  The present invention has been made in view of this point, and an object of the present invention is to make it possible to reliably detect the risk of contact between the disinfecting solution and the acid cleaning solution at a low cost.

  In order to achieve the above object, in the present invention, the presence or absence of air in the disinfecting liquid line and the acid cleaning liquid line is detected.

The first invention is a dialysate supply apparatus configured to mix dialysate with water and produce a dialysate,
A water line through which water flows,
A disinfectant tank for storing disinfectant,
An acid cleaning liquid tank for storing the acid cleaning liquid;
A disinfecting liquid line for supplying the disinfecting liquid from the disinfecting liquid tank to the water line;
An acid cleaning liquid line for supplying the acid cleaning liquid in the acid cleaning liquid tank to the water line;
A disinfectant line detection sensor for detecting the presence or absence of air in the disinfectant line;
An acid cleaning liquid line detection sensor for detecting the presence or absence of air in the acid cleaning liquid line;
A controller for switching to a plurality of operation modes including a disinfecting liquid cleaning operation mode for supplying the disinfecting liquid to the water line and an acid cleaning operation mode for supplying the acid cleaning liquid to the water line;
The control device stops operation when the acid cleaning liquid line detection sensor detects that there is no air in the acid cleaning liquid line when in the disinfecting liquid cleaning operation mode, and is in the acid cleaning operation mode. In some cases, the operation is stopped when the disinfecting liquid line detection sensor detects that there is no air in the disinfecting liquid line.

  According to this configuration, when the disinfecting solution is supplied to the water line and the disinfecting solution is cleaned, the operation is stopped when it is detected that there is no air in the acid cleaning solution line. The fact that there is no air in the acid cleaning liquid line means that the acid cleaning liquid exists in the acid cleaning liquid line without performing acid cleaning, and this acid cleaning liquid flows into the water line. Can be considered. In this case, it is possible to prevent the disinfecting solution and the acid cleaning solution from coming into contact with each other by stopping the operation. In addition, since a sensor that detects the presence or absence of air is sufficient, the cost is lower than that of a sensor that detects electrical conductivity as in the conventional example.

  Similarly, when the acid cleaning liquid is supplied to the water line and the acid cleaning is performed, the operation is stopped when it is detected that the disinfecting liquid exists in the disinfecting liquid line and there is no air. This also makes it possible to prevent the disinfecting solution and the acid cleaning solution from coming into contact with each other at low cost.

According to a second invention, in the first invention,
A water tank in which water is stored;
A chemical liquid line pump for flowing the disinfectant liquid in the disinfectant tank into the disinfectant line,
The water tank communicates with the disinfectant line while being open to the atmosphere,
When the water tank is empty, the chemical liquid line pump causes the air in the water tank to flow into the disinfecting liquid line.

  According to this configuration, since the water tank is open to the atmosphere and communicated with the disinfecting liquid line, the disinfecting liquid in the disinfecting liquid line can be sent to the disinfecting liquid tank by sending air by the chemical liquid line pump. This prevents the disinfectant from being diluted with water.

According to a third invention, in the first invention,
A water tank in which water is stored;
A chemical line pump for allowing the acid cleaning liquid in the acid cleaning liquid tank to flow into the acid cleaning liquid line;
The water tank communicates with the acid cleaning liquid line while being open to the atmosphere,
A dialysis fluid supply apparatus configured to cause air in the water tank to flow into the acid cleaning line by the chemical liquid line pump when the water tank is empty.

  According to this configuration, since the water tank is open to the atmosphere and communicates with the acid cleaning liquid line, the acid cleaning liquid in the acid cleaning liquid line can be sent to the acid cleaning liquid tank by sending air with the chemical liquid line pump. This prevents the acid cleaning liquid from being diluted with water.

According to a fourth invention, in any one of the first to third inventions,
When in the disinfecting liquid cleaning operation mode, if the disinfecting liquid line detection sensor detects that air is present in the disinfecting liquid line, it is notified that the disinfecting liquid has run out.

  According to this configuration, when the disinfecting liquid is exhausted when in the disinfecting liquid cleaning operation mode, disinfection cannot be performed effectively. However, in this case, disinfection is terminated with incompleteness. Can be prevented in advance. Further, when the disinfecting liquid cleaning operation mode is selected without actually injecting the disinfecting liquid into the tank of the disinfecting liquid, it is possible to prevent the disinfection from not being performed.

According to a fifth invention, in any one of the first to third inventions,
When the acid cleaning liquid line detection sensor detects that there is air in the acid cleaning liquid line when in the acid cleaning operation mode, it is notified that the acid cleaning liquid has run out.

  According to this configuration, when the acid disinfectant is exhausted in the acid cleaning operation mode, the acid cleaning cannot be effectively performed. It is possible to prevent this from happening. In addition, when the acid cleaning operation mode is selected without actually injecting the acid cleaning liquid into the acid cleaning liquid tank, it is possible to prevent the acid cleaning from being not performed.

  According to the first invention, when it is detected that there is no air in the acid cleaning liquid line when in the disinfecting liquid cleaning operation mode, the operation is stopped, and when in the acid cleaning operation mode, air is supplied to the disinfecting liquid line. When it is detected that there is not, the operation is stopped. As a result, the risk of contact between the disinfecting solution and the acid cleaning solution can be reliably detected at a low cost.

  According to the second and third inventions, it is possible to prevent the acid cleaning liquid or the disinfecting liquid from being diluted with water by sending air to the disinfecting liquid line or the acid cleaning liquid line by the chemical liquid line pump.

  According to the fourth aspect of the present invention, it is possible to prevent the disinfection from being completed incomplete and the disinfection from being performed without being performed.

  According to the fifth aspect, it is possible to prevent the acid cleaning from being completed incomplete and the acid cleaning from being not performed.

It is a schematic block diagram of the hemodialysis system provided with the dialysate supply apparatus which concerns on embodiment of this invention. It is a block diagram of a dialysate supply apparatus. It is a longitudinal cross-sectional view of a mixer. It is a top view of a mixer. FIG. 2 is a view corresponding to FIG. 1 when in a dialysate generation operation mode. It is a schematic block diagram of a dialysate supply apparatus in the case of being in a pre-washing (water washing) operation mode. It is a schematic block diagram of the dialysate supply apparatus in the case of being in the main line disinfection operation mode (disinfection liquid washing operation mode). It is a schematic block diagram of the dialysate supply apparatus in the case of being in the main line acid washing operation mode (acid washing operation mode). It is a schematic block diagram of the dialysate supply apparatus in a chemical | medical solution line disinfection operation mode. It is a schematic block diagram of the dialysate supply apparatus in a chemical | medical solution line acid washing operation mode. It is a schematic block diagram of the dialysate supply apparatus in the main line discharge | emission operation | movement of post-cleaning and discharge operation mode. It is a schematic block diagram of the dialysate supply apparatus in the chemical | medical solution line air replacement operation | movement of a post-cleaning and discharge operation mode. It is a schematic block diagram of the dialysate supply apparatus in the tank and chemical | medical solution line air replacement operation | movement of a post-cleaning and discharge | emission operation mode.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a diagram showing a schematic configuration of a dialysate supply apparatus 1 according to an embodiment of the present invention. The dialysate supply device 1 constitutes a hemodialysis system A together with the RO device 100 and dialysis monitoring devices (console) 101, 101,. The hemodialysis system A is introduced into, for example, a dialysis center, a dialysis clinic, and a large hospital.

  The dialysate supply device 1 can supply dialysate simultaneously to a large number of monitoring devices 101 for dialysis. Although not shown, the dialysis monitoring device 101 is a conventionally well-known device including a blood pump, a dialyzer, and the like, and is configured such that one device can be used for each patient to perform hemodialysis treatment. . The dialysis monitoring device 101 is installed in a hemodialysis room.

  The RO device 100 is not particularly limited as long as it can purify RO water, and an RO device used in a hemodialysis system that has been generally constructed conventionally can be used. For example, it is an apparatus for purifying RO water by removing impurities contained in tap water by a reverse osmosis method. The RO device 100 is installed in a machine room or the like together with the dialysate supply device 1.

  The dialysate supply device 1 mixes A stock solution and B stock solution as dialysate stock solutions with RO water at a constant mixing ratio to generate dialysate, and supplies the generated dialysate to each dialysis monitoring device 101. It is configured as follows.

  The dialysate supply apparatus 1 includes a water supply tank (water tank) 10 opened to the atmosphere, a main line (water line) L1, a chemical liquid line L2, a water supply line L3, a water supply pump P1, and a chemical liquid line pump P2. I have.

  The water supply tank 10 is disposed at a predetermined height of about 1.5 m to 2.0 m with respect to the floor surface. A partition wall 11 is provided inside the water supply tank 10. The partition wall 11 partitions the inside of the water supply tank 10 into a constant water level portion 10a for keeping the RO water level at a constant water level and a storage portion 10b for receiving the RO water overflowing from the constant water level portion 10a. . Further, an RO water discharge pipe portion 12 is provided at the upper portion of the water supply tank 10. Further, although not shown, a water level sensor for detecting the water level is also provided inside the water supply tank 10.

  The main line L <b> 1 is configured by piping connected to the discharge unit of the RO device 100 and reaching the water supply tank 10. A shutoff valve V1, which is a component of the dialysate supply device 1, is provided at the upstream end of the main line L1. This shut-off valve V1 is an electric type that is controlled to be opened and closed by the control device 20 of the dialysate supply device 1. In the open state, the discharge portion of the RO device 100 and the main line L1 are in communication with each other, and the closed valve V1 is closed. In the state, the communication between the discharge unit of the RO device 100 and the main line L1 is blocked.

  A midway portion of the main line L1 branches into a first branch line L11 and a second branch line L12. The first branch line L <b> 11 is connected to the storage unit 10 b of the water supply tank 10. The 2nd branch line L12 is connected to the site | part away from the connection site | part of the 1st branch line L11 in the storage part 10b of the water supply tank 10. FIG. Therefore, RO water flows into the water supply tank 10 from the first branch line L11 and the second branch line L12.

  In the middle of the second branch line L12, a deaeration pump P3 that is a component of the dialysate supply device 1 is provided. The deaeration pump P3 is controlled by the control device 20. The deaeration pump P3 may be omitted.

  A drain line L13 is connected to the second branch line L12 of the main line L1. The drain line L13 is for draining the RO water, the disinfectant liquid, and the acid cleaning liquid in the water supply tank 10 and the main line L1. The drainage line L13 is provided with a drainage valve V2 that is a component of the dialysate supply device 1. The drain valve V2 is controlled to be opened and closed by the control device 20 in the same manner as the shutoff valve V1. The drain valve V2 is in a drained state in the open state, and stops draining in the closed state.

  The main line L1 also has a supply line L14 for supplying the liquid in the storage part 10b of the water supply tank 10 to the constant water level part 10a. A water supply pump P1 is provided in the middle of the feed line L14. The feed water pump P <b> 1 is controlled by the control device 20.

  The chemical liquid line L2 is a pipe that is connected downstream of the shutoff valve V1 of the main line L1 and upstream of the branch portions of the first branch line L11 and the second branch line L12, and reaches the supply line L14. It is configured. At the upstream end of the chemical liquid line L2, a first chemical liquid line valve V3, which is a constituent element of the dialysate supply device 1, is provided. The first chemical liquid line valve V3 is controlled to be opened and closed by the control device 20 in the same manner as the shutoff valve V1. In the open state, the upstream end of the chemical liquid line L2 and the main line L1 are in communication with each other, whereas in the closed state, the first chemical liquid line valve V3 The communication between the upstream end and the main line L1 is blocked.

  A second chemical liquid line valve V4, which is a component of the dialysate supply device 1, is provided at the downstream end of the chemical liquid line L2. The second chemical liquid line valve V4 is controlled to be opened and closed by the control device 20 in the same manner as the shutoff valve V1. In the open state, the downstream end of the chemical liquid line L2 and the main line L1 are in communication with each other, whereas in the closed state, the second chemical liquid line valve V4 The communication between the downstream end and the main line L1 is blocked.

  The chemical liquid line L2 includes a disinfecting liquid line L21 and an acid cleaning liquid line L22. The disinfecting liquid line L21 branches from the downstream side of the first chemical liquid line valve V3 in the chemical liquid line L2. A disinfecting liquid tank 31 that is a component of the dialysate supplying apparatus 1 is connected to the upstream end of the disinfecting liquid line L21. In the disinfecting liquid tank 31, for example, a chemical liquid (disinfecting liquid) such as sodium hypochlorite is stored. The disinfectant is not limited to this, and various disinfectants can be used.

  At the downstream end of the disinfecting liquid line L21, a disinfecting liquid tank valve V5 that is a component of the dialysate supplying apparatus 1 is provided. The disinfecting liquid tank valve V5 is controlled to be opened and closed by the control device 20 in the same manner as the shutoff valve V1, and the downstream end of the disinfecting liquid line L21 is opened in the open state, while the downstream end of the disinfecting liquid line L21 is closed in the closed state. It has become so.

  The disinfecting liquid line L21 is provided with a disinfecting liquid line detection sensor S1 that is a component of the dialysate supplying apparatus 1. The disinfecting liquid line detection sensor S1 is for detecting whether air is present in the disinfecting liquid line L21, and can be configured using a known sensor. That is, when air exists in the disinfecting liquid line L21, no disinfecting liquid exists in the disinfecting liquid line L21, while no air exists in the disinfecting liquid line L21. In this case, it is assumed that a disinfectant is present. The disinfectant liquid line detection sensor S1 is connected to the control device 20 and outputs a detection result.

  The acid cleaning liquid line L22 branches from the downstream side of the disinfecting liquid line L21 in the chemical liquid line L2. An acid cleaning liquid tank 32 that is a component of the dialysate supply apparatus 1 is connected to the upstream end of the acid cleaning liquid line L22. The acid cleaning solution tank 32 stores a chemical solution (acid cleaning solution) such as acetic acid. The acid cleaning liquid is not limited to this, and various acid cleaning liquids can be used.

  At the downstream end of the acid cleaning liquid line L22, an acid cleaning liquid tank valve V6 that is a component of the dialysate supply apparatus 1 is provided. The acid cleaning liquid tank valve V6 is controlled to be opened and closed by the control device 20 in the same manner as the shutoff valve V1. In the open state, the downstream end of the acid cleaning liquid line L22 is opened, while in the closed state, the downstream end of the acid cleaning liquid line L22 is closed. It has become so.

  The acid cleaning liquid line L22 is provided with an acid cleaning liquid line detection sensor S2, which is a component of the dialysate supply apparatus 1. The acid cleaning liquid line detection sensor S2 is for detecting whether or not air is present inside the acid cleaning liquid line L22, and is configured using a known sensor in the same manner as the disinfecting liquid line detection sensor S1. be able to. The acid cleaning liquid line detection sensor S2 is connected to the control device 20 and outputs a detection result.

  The water supply line L3 is a line for supplying RO water to the mixer 40 included in the dialysate supply device 1 and is configured by a pipe connected to the constant water level portion 10a of the water supply tank 10 and reaching the mixer 40. . At the upstream end of the water supply line L3, a water supply valve V7, which is a component of the dialysate supply device 1, is provided. The water supply valve V7 is controlled to be opened and closed by the control device 20 in the same manner as the shutoff valve V1, and the upstream end of the water supply line L3 is opened in the open state, while the upstream end of the water supply line L3 is closed in the closed state. ing. A flow meter 33 is provided downstream of the water supply valve V7 in the water supply line L3. The flow meter 33 is connected to the control device 20 and outputs a detection result.

  The downstream side of the water supply line L3 is branched into a first water supply line L31 and a second water supply line L32. The first water supply line L31 and the second water supply line L32 are connected to the mixer 40.

  The dialysate supply apparatus 1 has an A stock solution tank (second dialysate stock solution supply means) 35 that stores A stock solution, and a B stock solution tank (first dialysate stock solution supply means) 36 that stores B stock solution. . In the A stock solution tank 35, as A stock solution, for example, a chemical solution containing sodium chloride, potassium chloride, calcium chloride, magnesium chloride, anhydrous sodium acetate, glucose, etc. is diluted to a predetermined concentration by supplying RO water. It is stored at. As the A stock solution tank 35, a powder-type dialysate stock solution dissolving device configured to dissolve a powdered powder of the above components with RO water to obtain A stock solution can be used.

  In the line downstream of the A stock solution tank 35, an A stock solution injection pump P4, which is a component of the dialysate supply device 1, is provided. The A stock solution injection pump P4 can be constituted by a constant flow pump, for example, and is controlled by the control device 20 so that the A stock solution in the A stock solution tank 35 can be supplied to the mixer 40 at an arbitrary flow rate. Yes.

  In the B stock solution tank 36, for example, a chemical solution containing sodium hydrogen carbonate or the like is stored as a B stock solution in a state of being diluted to a predetermined concentration by supplying RO water. As the B stock solution tank 36, the above powder type dialysate stock solution dissolving apparatus can be used.

  On the downstream side of the B stock solution tank 36, a B stock solution injection pump P5, which is a component of the dialysate supply device 1, is provided. The B stock solution injection pump P5 can be constituted by, for example, a constant flow pump, and is controlled by the control device 20 so that the B stock solution in the B stock solution tank 36 can be supplied to the mixer 40 at an arbitrary flow rate. Yes.

  As the A stock solution injection pump P4 and the B stock solution injection pump P5, for example, a small pump of about 1 L / min can be used.

  The mixer 40 is arrange | positioned below the water supply tank 10, and has comprised the cylinder shape extended in the up-down direction as a whole, as shown in FIG. And the mixer 40 is comprised so that A undiluted | stock solution and B undiluted | stock solution can be mixed uniformly with the RO water supplied with the drop pressure from the water supply tank 10. FIG.

  That is, the mixer 40 includes an upper mixing unit 41 for mixing the RO water and the B stock solution, a lower mixing unit 42 for mixing the water and the B stock solution mixed in the upper mixing unit 41, and the A stock solution. And a pair of inflow pipes 43, 43 for allowing the liquid to flow into the upper mixing section 41, a first outflow pipe 44 for allowing the liquid in the upper mixing section 41 to flow out, and a pair of A stock solution dialysate stock solution supply pipes 45 and 45 and a pair of second outflow pipes 46 and 46 for allowing the liquid in the lower mixing portion 42 to flow out.

  The upper mixing portion 41 includes a cylindrical peripheral wall portion 41a extending in the vertical direction, an upper wall portion 41b provided at the upper end portion of the peripheral wall portion 41a, and a lower wall portion 41c provided at the lower end portion of the peripheral wall portion 41a. An upper mixing chamber R1 is defined in the inside. The upper mixing chamber R1 is a chamber for mixing the RO water and the B stock solution.

  The inflow pipes 43, 43 are provided so as to extend in a substantially vertical direction so as to protrude into the upper mixing portion 41 from the upper wall portion 41 b of the upper mixing portion 41, and for flowing water and B stock solution into the upper mixing portion 41. Is. As shown also in FIG. 4, the inflow pipes 43 and 43 are separated outward from the radial center of the upper mixing portion 41 and are located in the vicinity of the peripheral wall portion 41a. These inflow pipes 43 and 43 are arranged so as to have a point-symmetrical positional relationship with the radial center of the upper mixing part 41 as the center of symmetry. Moreover, lower end openings (downstream openings) 43a and 43a of the inflow pipes 43 and 43 are located in the vicinity of the lower wall portion 41c.

  The number of inflow pipes 43 may be one, or three or more. In the case of three or more, they may be arranged at substantially equal intervals in the circumferential direction of the upper mixing unit 41 or may be arranged at unequal intervals. Further, when a plurality of inflow pipes 43 are provided, the diameters may be different from each other or the same diameter.

  The first outflow pipe 44 is provided so as to protrude into the upper mixing portion 41 from the lower wall portion 41c of the upper mixing portion 41, and extends downward. The first outflow pipe 44 has a larger diameter than the inflow pipes 43, 43, and is disposed at the radial center of the upper mixing section 41. An upper end opening (upstream opening) 44a of the first outflow pipe 44 is located in the vicinity of the upper wall 41b. That is, the upper end opening 44 a of the first outflow pipe 44 is positioned above the lower end openings 43 a and 43 a of the inflow pipes 43 and 43.

  An upstream pipe 48 to which an upstream concentration sensor S3 that is a component of the dialysate supply device 1 is connected is provided on the upper wall portion 41b of the upper mixing portion 41. The upstream pipe 48 communicates with the upper mixing chamber R1 and can guide the liquid in the upper mixing chamber R1 to the upstream concentration sensor S3. The upstream concentration sensor S3 can measure the mixing ratio of the B stock solution to the RO water in substantially real time, and is well known in the art. The upstream concentration sensor S3 is connected to the control device 20 and outputs a detection result.

  The arrangement position of the upstream side concentration sensor S3 is such that the flow of the liquid mixture in the upper mixing chamber R1 to be measured is directed upward and toward the center, so that the upper side of the upper mixing chamber R1 is substantially at the center. However, the present invention is not limited to this, and may be, for example, a side portion or a lower portion of the upper mixing chamber R1.

  In the vicinity of the central portion of the first outflow pipe 44 in the vertical direction, A stock solution supply pipes 45 and 45 are provided. The A stock solution supply pipes 45, 45 extend in the radial direction (horizontal direction) of the first outflow pipe 44 and communicate with the inside of the first outflow pipe 44. The A stock solution supply pipes 45, 45 are provided at a distance of about 180 ° in the circumferential direction of the first outflow pipe 44. Therefore, the A stock solutions flowing into the first outflow tube 44 from the A stock solution supply pipes 45 and 45 are in a direction in which they collide with each other.

  The number of A stock solution supply pipe 45 may be one, or three or more. In the case of three or more, they may be arranged at substantially equal intervals in the circumferential direction of the first outflow pipe 44 or may be arranged at unequal intervals. Further, when a plurality of A stock solution supply pipes 45 are provided, the diameters may be different from each other or the same diameter.

  The lower mixing portion 42 includes a peripheral wall portion 42a formed in a cylindrical shape extending in the vertical direction, an upper wall portion 42b provided at the upper end portion of the peripheral wall portion 42a, and a lower wall portion 42c provided at the lower end portion of the peripheral wall portion 42a. A lower mixing chamber R2 is defined in the inside. The lower mixing chamber R2 serves as a chamber for mixing the RO water and B stock solution with the A stock solution.

  The lower end portion (downstream side) of the first outflow pipe 44 protrudes from the upper wall portion 42 b of the lower mixing portion 42 into the lower mixing portion 42. A lower end opening (downstream opening) 44 b of the first outflow pipe 44 is located in the vicinity of the lower wall portion 42 c of the lower mixing portion 42.

  A turbulent flow generation member (not shown) that generates turbulent flow in the liquid flowing through the first outflow pipe 44 may be provided inside the first outflow pipe 44.

  The second outflow pipes 46, 46 are provided so as to extend from the lower wall part 42 c of the lower mixing part 42 into the lower mixing part 42 so as to protrude into the lower mixing part 42. Dialysis fluid) is allowed to flow out from the lower mixing section 42. The second outflow pipes 46, 46 are spaced outward from the radial center of the lower mixing portion 42 and are located in the vicinity of the peripheral wall portion 42 a. These second outflow pipes 46 and 46 are arranged so as to have a point-symmetrical positional relationship with the center of the lower mixing portion 42 in the radial direction as the center of symmetry. Further, upper end openings (upstream openings) 46a, 46a of the second outflow pipes 46, 46 are located in the vicinity of the upper wall portion 42b. That is, the upper end openings 46 a and 46 a of the second outflow pipes 46 and 46 are positioned above the opening 44 b on the downstream side of the first outflow pipe 44.

  A downstream pipe 49 to which a downstream concentration sensor S4 that is a component of the dialysate supply device 1 is connected is provided on the upper wall portion 42b of the lower mixing portion 42. The downstream pipe 49 communicates with the lower mixing chamber R2 and can guide the liquid in the lower mixing chamber R2 to the downstream concentration sensor S4. The downstream concentration sensor S4 can measure the mixing ratio of the A stock solution to the RO water in substantially real time, and is well known in the art. The downstream concentration sensor S4 is connected to the control device 20 and outputs a detection result.

  The arrangement position of the downstream concentration sensor S4 is such that the flow of the liquid mixture in the lower mixing chamber R2 to be measured is upward and toward the side, so that the upper portion of the lower mixing chamber R2 and Although a side part is preferable, it is not restricted to this, For example, the lower part and center part of lower mixing chamber R2 may be sufficient.

  A dialysate supply line L5, which is a component of the dialysate supply apparatus 1, is connected to the lower ends of the second outflow pipes 46, 46. As shown in FIG. 1, the dialysate supply line L <b> 5 is connected to a dialysate tank 38 that is a component of the dialysate supply apparatus 1, and the generated dialysate is temporarily stored in the dialysate tank 38. It has become. The dialysate tank 38 is connected to a dialysate pipe extending to each of the dialysis monitoring devices 101, 101,. The dialysate tank 38 is provided with a liquid amount detection sensor (not shown), and the detection result is output to the control device 20.

  The dialysate supply device 1 includes a liquid feed pump 39 for supplying the dialysate in the dialysate tank 38 to the dialysis monitoring device 101. The liquid feed pump 39 can be configured by a general liquid feed pump.

  In addition, as shown in FIG. 2, the dialysate supply device 1 has a notification device H. This notification device H is configured to be able to notify predetermined information to surrounding people by generating sound and light under the control of the control device 20, and for example, a speaker, a lamp, a display screen, etc. is there. As will be described in detail later, the alarm device H is configured to operate in the main line acid cleaning operation mode and the chemical line acid when the disinfecting liquid in the disinfectant tank 31 becomes empty during operation in the main line disinfection operation mode and the chemical line disinfection operation mode. When the acid cleaning liquid in the acid cleaning liquid tank 32 becomes empty during the operation in the cleaning operation mode, when the disinfecting liquid tank 31 is empty, or when the acid cleaning liquid tank 32 becomes empty, this is notified.

  The control device 20 is constituted by a microcomputer or the like that operates according to a predetermined program, and is connected with buttons and the like that are operated by an operator. The control device 20 detects signals input from the sensors S1 to S4 and the like and button operations by the operator, and controls the pumps P1 to P7 and the valves V1 to V6 based on these signals.

  Specifically, the control device 20 controls the B stock solution injection pump P5 based on the detection result of the upstream concentration sensor S3 to adjust the injection amount of the B stock solution to obtain a constant mixing ratio, and the downstream concentration. Based on the detection result of the sensor S4, the A stock solution injection pump P4 is controlled to adjust the injection amount of the A stock solution to obtain a constant mixing ratio. Adjustment of the injection amounts of the A stock solution and the B stock solution is performed by well-known feedback control.

  The control device 20 operates the dialysate supply device 1 in the dialysate generation operation mode shown in FIG. 5, the pre-wash (water wash) operation mode shown in FIG. 6, and the main line disinfection operation mode (shown in FIG. Disinfection liquid cleaning operation mode), main line acid cleaning operation mode (acid cleaning operation mode) shown in FIG. 8, chemical liquid line disinfection operation mode (disinfection liquid cleaning operation mode) shown in FIG. 9, and chemical liquid line shown in FIG. The operation is switched to the acid cleaning operation mode (acid cleaning operation mode) and the post-cleaning / discharging operation mode shown in FIGS. In the post-cleaning / discharge operation mode, there are a main line discharge operation shown in FIG. 11, a chemical liquid line air replacement operation shown in FIG. 12, and a tank and chemical liquid line air replacement operation shown in FIG.

  In the dialysate generation operation mode shown in FIG. 5, the control device 20 opens the shutoff valve V1 and the water supply valve V7, and closes the drain valve V2, the first chemical liquid line valve V3, and the second chemical liquid line valve V4. . In addition, the feed water pump P1, the degassing pump P3, the A stock solution injection pump P4, and the B stock solution injection pump P5 are operated.

  The RO water supplied from the RO device 100 flows into the storage unit 10b of the water supply tank 10 through the main line L1. The RO water in the storage unit 10b flows into the constant water level unit 10a through the supply line L14. The RO water in the constant water level portion 10a flows into the mixer 40 from the first water supply line L31 and the second water supply line L32 of the water supply line L3.

  The A stock solution in the A stock solution tank 35 is sent to the mixer 40 by the A stock solution injection pump P4. As shown in FIG. 3, the A stock solution flows from the A stock solution supply pipes 45 and 45 into the first outflow pipe 44 of the mixer 40.

  Further, as shown in FIG. 5, the B stock solution in the B stock solution tank 36 is sent to the mixer 40 by the B stock solution injection pump P5. The B stock solution does not flow directly into the mixer 40, but flows into the upstream side of the branch portion of the first water supply line L31 and the second water supply line L32 of the water supply line L3. Therefore, as shown in FIG. 3, the RO water and the B stock solution flow into the upper mixing chamber R <b> 1 of the mixer 40 from the inflow pipes 43 and 43.

  That is, in the mixer 40, the RO water and the B stock solution flow from the top to the bottom and flow into the lower portion of the upper mixing chamber R1. Since the upper end opening 44a of the first outflow pipe 44 is located above the lower end openings 43a, 43a of the inflow pipes 43, 43, the RO water and the B stock solution that have flowed into the upper mixing chamber R1 are mixed upward. The flow is changed toward the upper side of the chamber R1. In this way, the flow of the RO water and the B stock solution is reversed upside down in the upper mixing chamber R1, and thus the flow is disturbed, thereby promoting the mixing of the RO water and the B stock solution in the upper mixing chamber R1. . Furthermore, the lower end openings 43a, 43a of the inflow pipes 43, 43 are located near the outer periphery of the upper mixing chamber R1, while the upper end opening 44a of the first outflow pipe 44 is located at the center of the upper mixing chamber R1. Therefore, the flow of the RO water and the B stock solution flows from the portion near the outer periphery of the upper mixing chamber R1 toward the center, and this also disturbs the flow and promotes mixing.

  As described above, the RO water and the B stock solution are uniformly mixed in the upper mixing chamber R1. The mixing ratio of the B stock solution to the RO water in the upper mixing chamber R1 is detected by the upstream concentration sensor S3 via the upstream pipe 48 communicating with the upper mixing chamber R1. The control device 20 controls the B stock solution injection pump P5 based on the mixing ratio detected by the upstream concentration sensor S3, and performs feedback control so that the mixing ratio of the B stock solution to the RO water becomes a constant ratio.

  The liquid in which the RO water and the B stock solution in the upper mixing chamber R1 are mixed flows from the top to the bottom through the first outlet pipe 44. At this time, the A stock solution is supplied from the outer peripheral portion of the first outflow pipe 44 and mixed with the liquid in the first outflow pipe 44.

  The A stock solution and the liquid in which the RO water and the B stock solution are mixed flow into the lower mixing chamber R2 from the top to the bottom. Since the upper end openings 46a, 46a of the second outflow pipes 46, 46 are located above the opening 44b on the downstream side of the first outflow pipe 44, the A stock solution that has flowed into the lower mixing chamber R2, The liquid mixed with the RO water and the B stock solution changes its flow toward the upper side of the lower mixing chamber R2. In this way, the flow is reversed upside down in the lower mixing chamber R2, so that the flow is disturbed. As a result, the mixing of the A stock solution and the liquid in which the RO water and the B stock solution are mixed is performed in the lower mixing chamber R2. Promoted within. Furthermore, the upper end openings 46a, 46a of the second outflow pipes 46, 46 are located closer to the outer periphery of the lower mixing chamber R2, while the lower end opening 44b of the first outflow pipe 44 is the central part of the lower mixing chamber R2. Therefore, the flow in the lower mixing chamber R2 is a flow from the center to the side, and this also disturbs the flow and promotes mixing.

  As described above, the A stock solution and the liquid in which the RO water and the B stock solution are mixed are uniformly mixed in the lower mixing chamber R2 to form a dialysate. The mixing ratio of the A stock solution to the RO water in the lower mixing chamber R2 is detected by the downstream concentration sensor S4 via the downstream pipe 49 communicating with the lower mixing chamber R2. The control device 20 controls the A stock solution injection pump P4 based on the mixing ratio detected by the downstream concentration sensor S4, and performs feedback control so that the mixing ratio of the A stock solution to the RO water becomes a constant ratio. The feedback control of the A stock solution and the B stock solution can be performed using a conventionally known method, and thus detailed description thereof is omitted.

  The dialysate generated by the mixer 40 is temporarily stored in the dialysate tank 38 via the dialysate supply line L5, and is supplied from the dialysate tank 38 to the dialysis monitoring devices 101, 101,. Is done.

  When the dialysate is generated, the feed water tank 10 is arranged at a predetermined height at which a drop pressure can be obtained, and RO water is supplied from the feed water tank 10 to the mixer 40 to mix the A and B stock solutions. Thus, a dialysate having a stable concentration can be easily produced in a large amount. Since the supply is based on the drop pressure, the maximum supply amount can be easily increased. Further, if the amount of dialysate used in the dialysis monitoring devices 101, 101,... Decreases, the amount of dialysate in the dialysate tank 38 increases. When the amount exceeds a certain value, the water supply valve V7 is closed and the A stock solution injection pump P4 and the B stock solution injection pump P5 are stopped. Therefore, a flow rate control valve for controlling the supply amount of the dialysate is not necessary, and the control can be easily performed.

  In addition, since the B stock solution having fewer components than the A stock solution is mixed with the RO water before the A stock solution, the accuracy of concentration measurement can be increased, and as a result, feedback control can be performed with high accuracy. it can.

  Moreover, since the mixing location of A stock solution and B stock solution is separated in the flow direction of RO water, it is possible to measure the mixing ratio of B stock solution to water before mixing A stock solution after mixing B stock solution become. Therefore, it becomes possible to accurately control the mixing ratio of the B stock solution. Moreover, after obtaining the measurement result of the mixing ratio of the B stock solution, the mixing ratio of the A stock solution can be measured by mixing the A stock solution. Therefore, the mixing ratio of the A stock solution can be accurately controlled.

  The amount of dialysate produced by the dialysate supply device 1 is 35 liters per minute or more. This is made possible by making each pipe thicker by using the drop pressure, and further by making the mixer 40 a low pressure loss mixer without a wing-like stirring body. For this reason, since one dialysate supply device 1 can supply dialysate to a large number of monitoring devices 101 for dialysis, there is an advantage that the number of dialysate supply devices 1 can be reduced.

  Next, the pre-washing (water washing) operation mode shown in FIG. 6 will be described. This pre-washing (water washing) operation mode is a mode in which the main line L1 is washed with RO water. The control device 20 opens the shutoff valve V1, the first chemical liquid line valve V3, and the second chemical liquid line valve V4, and closes the drain valve V2, the disinfecting liquid tank valve V5, the acid cleaning liquid tank valve V6, and the water supply valve V7. To do. Further, the water supply pump P1, the chemical liquid line pump P2, and the deaeration pump P3 are operated. Thereby, the washing | cleaning by RO water is performed. At this time, the RO water is also supplied to the water supply tank 10, so that the water supply tank 10 can be cleaned. In FIG. 6, a thick line indicates a portion filled with RO water.

  Next, the main line disinfection operation mode shown in FIG. 7 will be described. This main line disinfection operation mode is a disinfectant washing operation mode in which the main line L1 is disinfected with a disinfectant, and is basically performed once a day after dialysis is completed.

  In the main line disinfection operation mode, the control device 20 opens the shutoff valve V1, the first chemical liquid line valve V3, the second chemical liquid line valve V4, and the disinfecting liquid tank valve V5, and sets the drain valve V2, the acid cleaning liquid tank valve V6, The water supply valve V7 is closed. Further, the water supply pump P1, the chemical liquid line pump P2, and the deaeration pump P3 are operated. Thereby, the disinfecting liquid in the disinfecting liquid tank 31 is sucked up from the disinfecting liquid line L21, and each line is disinfected with the disinfecting liquid. At this time, since the disinfecting liquid is also supplied to the water supply tank 10, the water supply tank 10 can be disinfected. In FIG. 7, fine points indicate the disinfectant.

  At this time, it is normal that the acid cleaning liquid in the acid cleaning liquid line L22 is replaced with air, and the acid cleaning liquid line L22 is normally filled with air. It is conceivable that the acid cleaning liquid in the cleaning liquid tank 32 tends to flow downstream of the chemical liquid line L2. In this case, since the acid cleaning liquid line detection sensor S2 always detects whether air is present in the acid cleaning liquid line L22, the acid cleaning liquid is detected in the acid cleaning liquid line L22 by the acid cleaning liquid line detection sensor S2. It is detected that it exists. Then, the control device 20 stops the operation immediately. Thereby, the chemical reaction due to the acid cleaning liquid being mixed into the disinfecting liquid can be suppressed. When the acid cleaning liquid line detection sensor S2 detects that the acid cleaning liquid is present inside the acid cleaning liquid line L22, the control device 20 notifies the surrounding people using light or sound. Also good.

  Next, the main line acid cleaning operation mode shown in FIG. 8 will be described. This main line acid washing operation mode is a mode performed for the purpose of removing substances (calcium carbonate, etc.) accumulated in the pipes constituting the main line L1, and is basically dialyzed once every two to three days. After the end. The frequency of the main line acid wash mode varies from dialysis facility to dialysis facility.

  In the main line acid cleaning operation mode, the control device 20 opens the shutoff valve V1, the first chemical liquid line valve V3, the second chemical liquid line valve V4, and the acid cleaning liquid tank valve V6, and the drain valve V2 and the disinfecting liquid tank valve V5. The water supply valve V7 is closed. Further, the water supply pump P1, the chemical liquid line pump P2, and the deaeration pump P3 are operated. As a result, the acid cleaning liquid in the acid cleaning liquid tank 32 is sucked up from the acid cleaning liquid line L22, and each line is cleaned with the acid cleaning liquid. At this time, since the acid cleaning liquid is also supplied to the water supply tank 10, the water supply tank 10 can be cleaned. In FIG. 8, the shaded area indicates the acid cleaning liquid.

  At this time, it is normal that the disinfecting liquid in the disinfecting liquid line L21 is replaced with air, and the disinfecting liquid line L21 is normally filled with air. It is conceivable that the disinfecting liquid in the liquid tank 31 tends to flow downstream of the chemical liquid line L2. In this case, since the disinfecting liquid line detection sensor S1 always detects whether or not air is present inside the disinfecting liquid line L21, the disinfecting liquid line detecting sensor S1 detects the disinfecting liquid inside the disinfecting liquid line L21. It is detected that it exists. Then, the control device 20 stops the operation immediately. Thereby, the chemical reaction by mixing disinfection liquid in an acid cleaning liquid can be suppressed. Note that when the disinfecting liquid line detection sensor S1 detects that the disinfecting liquid is present inside the disinfecting liquid line L21, the control device 20 uses light or sound to notify surrounding persons. Also good.

  Next, the chemical liquid line disinfection operation mode shown in FIG. 9 will be described. This chemical liquid line disinfection operation mode is a mode in which the chemical liquid line L2 is disinfected with a disinfectant, and is basically performed once a day after dialysis is completed.

  In the chemical liquid line disinfection operation mode, the controller 20 opens the first chemical liquid line valve V3, the second chemical liquid line valve V4, and the disinfecting liquid tank valve V5, and shuts off the valve V1, the drain valve V2, the acid cleaning liquid tank valve V6, The water supply valve V7 is closed. Further, the water supply pump P1, the chemical liquid line pump P2, and the deaeration pump P3 are operated. The chemical liquid line pump P2 is reversed. Thereby, the disinfecting liquid in the disinfecting liquid tank 31 is sucked up from the disinfecting liquid line L21, and each line is disinfected with the disinfecting liquid. At this time, since the disinfecting liquid is also supplied to the water supply tank 10, the water supply tank 10 can be disinfected.

  At this time, if the acid cleaning liquid tank valve V6 is defective for some reason and the acid cleaning liquid in the acid cleaning liquid tank 32 is about to flow downstream of the chemical liquid line L2, the acid cleaning liquid line L22 is detected by the acid cleaning liquid line detection sensor S2. It is detected that the acid cleaning liquid is present inside the. Then, the control device 20 stops the operation immediately. Thereby, the chemical reaction due to the acid cleaning liquid being mixed into the disinfecting liquid can be suppressed.

  Next, the chemical liquid acid cleaning operation mode shown in FIG. 10 will be described. This chemical line acid cleaning operation mode is a mode performed for the purpose of removing substances (calcium carbonate, etc.) accumulated in the pipes constituting the chemical line L2, and is basically dialyzed once every 2-3 days. After the end. The frequency of the chemical line acid washing operation mode varies depending on the dialysis facility.

  In the chemical liquid acid cleaning operation mode, the controller 20 opens the first chemical liquid line valve V3, the second chemical liquid line valve V4, and the acid cleaning liquid tank valve V6, and shuts off the valve V1, the drain valve V2, and the disinfecting liquid tank valve V5. The water supply valve V7 is closed. Further, the water supply pump P1, the chemical liquid line pump P2, and the deaeration pump P3 are operated. The chemical liquid line pump P2 is reversed. As a result, the acid cleaning liquid in the acid cleaning liquid tank 32 is sucked up from the acid cleaning liquid line L22, and each line is cleaned with the acid cleaning liquid. At this time, since the acid cleaning liquid is also supplied to the water supply tank 10, the water supply tank 10 can be cleaned.

  At this time, if there is a problem with the disinfecting liquid tank valve V5 for some reason and the disinfecting liquid in the disinfecting liquid tank 31 is about to flow downstream of the chemical liquid line L2, the disinfecting liquid line L21 is detected by the disinfecting liquid line detection sensor S1. It is detected that a disinfectant is present inside the. Then, the control device 20 stops the operation immediately. Thereby, the chemical reaction by mixing disinfection liquid in an acid cleaning liquid can be suppressed.

  Next, the post-cleaning / discharge operation mode (main line discharge operation) shown in FIG. 11 will be described. This main line discharging operation is an operation for discharging RO water after performing the same operation as in the pre-cleaning (water-washing) operation mode. The controller 20 opens the drain valve V2, the first chemical liquid line valve V3, and the second chemical liquid line valve V4, and closes the shutoff valve V1, the disinfecting liquid tank valve V5, the acid cleaning liquid tank valve V6, and the water supply valve V7. To do. Further, the water supply pump P1, the chemical liquid line pump P2, and the deaeration pump P3 are stopped. Thereby, RO water is discharged.

  Next, the post-cleaning / discharge operation mode (chemical line air replacement operation) shown in FIG. 12 will be described. This chemical liquid line air replacement operation is an operation of replacing the chemical liquid line L2 with air. The controller 20 opens the drain valve V2, the first chemical liquid line valve V3, and the second chemical liquid line valve V4, and closes the shutoff valve V1, the disinfecting liquid tank valve V5, the acid cleaning liquid tank valve V6, and the water supply valve V7. To do. Moreover, the feed water pump P1 and the deaeration pump P3 are stopped, and the chemical liquid line pump P2 is reversed. Thereby, the chemical liquid line L2 is replaced with air.

  Next, the post-cleaning / discharge operation mode (tank line and chemical line air replacement operation) shown in FIG. 13 will be described. This tank and chemical liquid line air replacement operation is an operation of replacing the disinfecting liquid line L21 of the chemical liquid line L2 or the acid cleaning liquid line L22 of the chemical liquid line L2 with air.

  When the control device 20 replaces the disinfecting liquid line L21 of the chemical liquid line L2 with air, the second chemical liquid line valve V4 and the disinfecting liquid tank valve V5 are opened, the shutoff valve V1, the drain valve V2, and the first chemical liquid. The line valve V3, the acid cleaning liquid tank valve V6, and the water supply valve V7 are closed. Moreover, the feed water pump P1 and the deaeration pump P3 are stopped, and the chemical liquid line pump P2 is reversed. Thereby, the disinfecting liquid line L21 of the chemical liquid line L2 is replaced with air.

  When the control device 20 replaces the acid cleaning liquid line L22 of the chemical liquid line L2 with air, the second chemical liquid line valve V4 and the acid cleaning liquid tank valve V6 are opened, the shutoff valve V1, the drain valve V2, and the first chemical liquid. The line valve V3, the disinfectant tank valve V5, and the water supply valve V7 are closed. Moreover, the feed water pump P1 and the deaeration pump P3 are stopped, and the chemical liquid line pump P2 is reversed. Thereby, the acid cleaning liquid line L22 of the chemical liquid line L2 is replaced with air.

  In addition, the controller 20 operates in the disinfecting liquid tank 31 when the disinfecting liquid line detection sensor S1 detects that air is present in the disinfecting liquid line L21 during operation in the main line disinfecting operation mode and the chemical liquid line disinfecting operation mode. The alarm device H is controlled so that the disinfectant becomes empty, and it is notified that the disinfectant has run out. That is, when the disinfecting liquid is exhausted in the main line disinfection operation mode and the chemical liquid disinfection operation mode, disinfection cannot be performed effectively. In this case, the disinfection is performed by notifying surrounding people by the alarm device H. Can be prevented from being terminated incompletely. Further, when the main line disinfection operation mode and the chemical liquid line disinfection operation mode are selected without actually injecting the disinfection liquid into the disinfection liquid tank 31, it is possible to prevent the disinfection from not being performed. It becomes possible.

  Further, when the controller 20 detects that there is air in the acid cleaning liquid line L22 by the acid cleaning liquid line detection sensor S2 in the main line acid cleaning operation mode and the chemical liquid acid cleaning operation mode, the acid cleaning liquid tank The alarm device H is controlled on the assumption that the acid cleaning liquid 32 has become empty, and is notified that the acid cleaning liquid has run out. In other words, when the acid disinfectant is exhausted in the main line acid cleaning operation mode and the chemical liquid acid cleaning operation mode, the acid cleaning cannot be performed effectively. It is possible to prevent the cleaning from being completed incompletely. In addition, when the main line acid cleaning operation mode and the chemical line acid cleaning operation mode are selected without actually injecting the acid cleaning liquid into the acid cleaning liquid tank 32, it is possible to prevent the acid cleaning from being not performed. It becomes possible to do.

  Further, the water tank 10 communicates with the disinfecting liquid line L21 and the acid cleaning liquid line L22 while being open to the atmosphere. The control device 20 can be configured to cause the air in the water tank 10 to flow into the disinfecting liquid line L21 by the chemical liquid line pump P2 when the water tank 10 is empty. As a result, the disinfecting liquid in the disinfecting liquid line L21 can be sent to the disinfecting liquid tank 31, so that the disinfecting liquid can be prevented from being diluted by the RO water.

  Further, the controller 20 is configured to cause the air in the water tank 10 to flow into the acid cleaning liquid line L22 by the chemical liquid line pump P2 when the water tank 10 is empty when the acid cleaning liquid line L22 is replaced with air. can do. Thereby, since it becomes possible to send the acid cleaning liquid of the acid cleaning liquid line L22 to the acid cleaning liquid tank 32, it is possible to prevent the acid cleaning liquid from being diluted by the RO water.

  As described above, according to the dialysate supply device 1 according to this embodiment, when the disinfecting solution is supplied to the main line L2 and the disinfecting solution is cleaned, it is detected that there is no air in the acid cleaning solution line L22. The operation is stopped in the event of a failure. The fact that there is no air in the acid cleaning liquid line L22 means that the acid cleaning liquid exists in the acid cleaning liquid line L22 without performing the acid cleaning, and this acid cleaning liquid is the disinfecting liquid in the main line L1. It may be possible to come into contact with In this case, it is possible to prevent the disinfecting solution and the acid cleaning solution from coming into contact with each other by stopping the operation. Similarly, when the acid cleaning liquid is supplied to the main line L1 and the acid cleaning is performed, the operation is stopped when it is detected that the disinfecting liquid exists in the disinfecting liquid line L21 and there is no air.

  This makes it possible to reduce the risk of contact between the disinfecting liquid and the acid cleaning liquid at low cost by using inexpensive air detection sensors as the disinfecting liquid line detection sensor S1 and the acid cleaning liquid line detection sensor S2 as compared with the conventional conductivity detection sensor. It can be detected reliably.

  Further, the disinfecting liquid tank 31 and the acid cleaning liquid tank 32 may be provided outside the apparatus main body of the dialysate supply apparatus 1 separately from the apparatus main body.

  The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the dialysate supply device according to the present invention can be used, for example, in a large-scale dialysis facility.

1 Dialysate supply device 10 Water supply tank (water tank)
20 Control device 31 Disinfectant tank 32 Acid cleaning liquid tank 40 Mixer 41 Upper mixing part 41b Upper wall part 41c Lower wall part 42 Lower mixing part 42b Upper wall part 42c Lower wall part 43 Inlet pipe 43a Lower end opening 44 First outflow Pipe 44a Upper end opening 44b Lower end opening 45 A Stock solution dialysate stock supply pipe 46 Second outflow pipe 46a Upper end opening L1 Main line (water line)
L21 Disinfection liquid line L22 Acid cleaning line L41 A Stock solution line L42 B Stock solution line S1 Disinfection solution line detection sensor S2 Acid cleaning solution line detection sensor

Claims (5)

In a dialysate supply device configured to mix dialysate with water and generate dialysate,
A water line through which water flows,
A disinfectant tank for storing disinfectant,
An acid cleaning liquid tank for storing the acid cleaning liquid;
A disinfecting liquid line for supplying the disinfecting liquid from the disinfecting liquid tank to the water line;
An acid cleaning liquid line for supplying the acid cleaning liquid in the acid cleaning liquid tank to the water line;
A disinfectant line detection sensor for detecting the presence or absence of air in the disinfectant line;
An acid cleaning liquid line detection sensor for detecting the presence or absence of air in the acid cleaning liquid line;
A controller for switching to a plurality of operation modes including a disinfecting liquid cleaning operation mode for supplying the disinfecting liquid to the water line and an acid cleaning operation mode for supplying the acid cleaning liquid to the water line;
The control device stops operation when the acid cleaning liquid line detection sensor detects that there is no air in the acid cleaning liquid line when in the disinfecting liquid cleaning operation mode, and is in the acid cleaning operation mode. Sometimes, the dialysis fluid supply device stops operation when the sterilization fluid line detection sensor detects that there is no air in the sterilization fluid line. In the dialysate supply device according to claim 1,
A water tank in which water is stored;
A chemical liquid line pump for flowing the disinfectant liquid in the disinfectant tank into the disinfectant line,
The water tank communicates with the disinfectant line while being open to the atmosphere,
A dialysis fluid supply apparatus configured to cause the air in the water tank to flow into the disinfecting fluid line by the chemical fluid line pump when the water tank is empty. In the dialysate supply device according to claim 1,
A water tank in which water is stored;
A chemical line pump for allowing the acid cleaning liquid in the acid cleaning liquid tank to flow into the acid cleaning liquid line;
The water tank communicates with the acid cleaning liquid line while being open to the atmosphere,
A dialysis fluid supply apparatus configured to cause air in the water tank to flow into the acid cleaning line by the chemical liquid line pump when the water tank is empty. In the dialysate supply device according to any one of claims 1 to 3,
A dialysis fluid supply apparatus, characterized in that when in the disinfection fluid cleaning operation mode, the disinfection fluid line detection sensor detects that there is air in the disinfection fluid line, and notifies that the disinfection fluid has run out. In the dialysate supply device according to any one of claims 1 to 3,
A dialysate supply apparatus characterized in that when the acid cleaning liquid line detection sensor detects that there is air in the acid cleaning liquid line when in the acid cleaning operation mode, the acid cleaning liquid runs out.

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