Dry powder A online liquid preparation device and method

Abstract

The invention provides an A dry powder online liquid preparation device and method. The top of the dry powder accommodating module A is communicated with a bottom waterway of the liquid accommodating module A, the top of the liquid accommodating module A is communicated with a waterway of the liquid detecting module A, the liquid detecting module A is communicated with a waterway of the first electromagnetic valve group, and the water quantity metering module is respectively communicated with the circulating power module, the overflow module, the first electromagnetic valve group and the second electromagnetic valve group through waterways. The circulating power module is in waterway communication with the heating module, the heating module is in waterway communication with the overflow module, the overflow module is in waterway communication with the third electromagnetic valve group, and the fourth electromagnetic valve group is in waterway communication with the third electromagnetic valve group and the bottom of the A dry powder containing module. According to the invention, short-time full dissolution of the A dry powder is realized, the dialysate with accurate concentration is effectively obtained, and the reliability of liquid preparation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an A dry powder online liquid preparation device and method. Background Art

[0002] Dialysis fluid is divided into liquid A and liquid B. Liquid B contains fewer substances, usually only one compound, sodium bicarbonate, or with a small amount of sodium chloride and glucose added; liquid A contains a variety of compounds, mainly sodium chloride, but also calcium chloride, magnesium chloride, potassium chloride, acetic acid or citric acid. Generally, there are three sources of liquid A: (1) barreled liquid, which is pre-prepared in the factory and placed in a plastic barrel. This method has the problem of liquid being easily contaminated; (2) centralized liquid supply, which is achieved by installing a large liquid preparation system, mixing powder and reverse osmosis water, storing the prepared liquid in a tank, and transporting it to the dialysis machine through a pipeline system for use. This method is not convenient for personalized customization of the liquid preparation ratio; (3) dry powder online, which is to place a single dose of dry powder in a small barrel or bag and connect it to the dialysis machine for online use. However, dry powder online has not yet been truly applied in clinical practice.

[0003] At present, the dry powder online design of the existing technology cannot generate qualified dialysate because dry powder A contains multiple compounds and is difficult to dissolve to the accurate concentration of each component required by the formula. In addition, the commonly used electromagnetic stirring, heating and dry powder bag powder discharge steps often take more than 30 minutes to dissolve. In addition, there are problems such as undissolved dry powder remaining on the edge of the liquid preparation tank and in the dry powder bag, the structure of the spray pipe on the top and the blade on the bottom causing the dry powder bag outlet to bulge and retain dry powder dead corners, no automatic exhaust structure, no automatic disinfection solution, and a large cavity that takes a long time to disinfect. As a result, it is impossible to effectively obtain dialysate of accurate concentration and the reliability of liquid preparation is poor. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes an A dry powder online liquid preparation device and method, which can achieve full dissolution of A dry powder in a short time, effectively obtain dialysate with accurate concentration and improve the reliability of liquid preparation.

[0005] To achieve the above-mentioned purpose, the embodiment of the present invention provides an A dry powder online liquid preparation device, comprising:

[0006] A dry powder containing module, A liquid containing module, a water metering module, a heating module, an A liquid detection module, a first solenoid valve group, a second solenoid valve group, a third solenoid valve group, a fourth solenoid valve group, a circulation power module, an overflow module and a control circuit module;

[0007] The top of the A dry powder containing module is in communication with the bottom water channel of the A liquid containing module, the top of the A liquid containing module is in communication with the A liquid detection module water channel, the A liquid detection module is in communication with the first electromagnetic valve group water channel, the water metering module is in communication with the circulation power module, the overflow module, the first electromagnetic valve group and the second electromagnetic valve group water channels respectively, the circulation power module is in communication with the heating module water channel, the heating module is in communication with the overflow module water channel, the overflow module is in communication with the third electromagnetic valve group water channel, and the fourth electromagnetic valve group is in communication with the third electromagnetic valve group and the bottom water channel of the A dry powder containing module respectively;

[0008] The A dry powder containing module, the A liquid containing module, the water metering module, the heating module, the A liquid detection module, the first solenoid valve group, the second solenoid valve group, the third solenoid valve group, the fourth solenoid valve group, and the circulating power module are all electrically connected to the control circuit module; the control circuit module is used to receive the installation completion signal of the A dry powder containing module, the control circuit module is used to send a control signal to control the A liquid containing module to change the volume, the control circuit module is used to receive the water level detection signal of the water metering module, the control circuit module is used to control the heating module to heat the liquid in the water circuit, the control circuit module is used to control the A liquid detection module to detect the liquid in the water circuit, the control circuit module is used to control the opening and closing of the first solenoid valve group, the second solenoid valve group, the third solenoid valve group and the fourth solenoid valve group, and the control circuit module is used to control the circulating power module to transport the liquid in the water metering module to the heating module.

[0009] Furthermore, the bottom and top of the A dry powder containing module are both wedge-shaped, and the bottom angle of the A dry powder containing module is smaller than the top angle; the bottom and top of the A liquid containing module are wedge-shaped.

[0010] Furthermore, the volume of the A dry powder containing module is at least equal to a preset multiple of the volume of the A dry powder, and the volume of the A dry powder containing module is at most equal to the maximum volume of the A liquid containing module.

[0011] Furthermore, the A liquid containing module includes: a soft cavity and two wall panels, the soft cavity can change its volume along a first direction, the two wall panels are arranged parallel and spaced apart along the first direction, and the soft cavity is arranged between the two wall panels and connected to the two wall panels.

[0012] Further, the overflow module comprises: an air separation chamber and an overflow valve; the air separation chamber and the overflow valve are in water communication, the air separation chamber is in water communication with the heating module, and the overflow valve is in water communication with the water metering module;

[0013] The air separation chamber is used to separate gas and liquid so that the gas is located above the liquid; the overflow valve is used to overflow the gas and liquid to the water metering module when the water pressure in the air separation chamber is greater than the back pressure of the overflow valve.

[0014] Furthermore, the water metering module is provided with a float, and the water metering module is provided with at least two detection positions, an upper position and a lower position, to detect the position of the float to obtain a water level detection signal; and an exhaust port and an air inlet are provided on the top of the water metering module.

[0015] The embodiment of the present invention further provides an A dry powder online liquid preparation method, comprising: receiving an installation completion signal of the A dry powder containing module, and selecting to enter an A liquid preparation mode;

[0016] receiving a water level detection signal from a water metering module in real time, and when the water level detection signal meets a preset metering requirement, controlling the second solenoid valve group to close and controlling the circulation power module to transport the liquid in the water metering module to the heating module;

[0017] Control the heating module to heat the liquid in the water channel, and when the temperature of the liquid in the water channel meets the preset requirements, control the third solenoid valve group and the fourth solenoid valve group to open, input the liquid from the bottom of the A dry powder containing module, dissolve the A dry powder, and obtain the A powder dissolved liquid;

[0018] Inputting the A powder dissolving liquid from the top of the A dry powder containing module to the bottom of the A liquid containing module, and outputting it from the top of the A liquid containing module;

[0019] Controlling the A liquid detection module to sequentially perform conductivity detection and optical detection on the A powder dissolved liquid output from the top of the A liquid containing module;

[0020] The first solenoid valve group is controlled to open, and the A powder solution that has completed the conductivity detection and optical detection is circulated and dissolved until the conductivity and optical detection analysis results of the A powder solution meet the preset requirements and the number of cyclic dissolutions of the A powder solution meets the preset cycle number requirements, and it is determined that the A powder solution meets the liquid preparation requirements.

[0021] Furthermore, an A dry powder online liquid preparation method proposed in an embodiment of the present invention further includes: the water metering module is provided with a float;

[0022] The water level in the water metering module is measured and detected by the number of times the float of the water metering module moves, so as to obtain a water level detection signal;

[0023] During the liquid circulation dissolution process, when the water level detection signal result does not meet the preset metering requirement, the second solenoid valve group is controlled to open;

[0024] When the water level detection signal meets the preset metering requirement, the first solenoid valve group is controlled to open, and the A powder solution that has completed the conductivity detection and optical detection is circulated and dissolved until the conductivity and optical detection analysis results of the A powder solution meet the preset requirements and the number of cyclic dissolutions of the A powder solution meets the preset cycle number requirements, and it is determined that the A powder solution meets the liquid preparation requirement, including: controlling the first solenoid valve group to open, and transporting the A powder solution whose conductivity and optical detection analysis results do not meet the preset requirements to the water metering module through the bottom of the A liquid containing module;

[0025] Controlling the circulation power module to transport the A powder solution in the water metering module to the heating module for heating and dissolution, thereby obtaining a heated A powder solution;

[0026] Control the third solenoid valve group and the fourth solenoid valve group to open, input the heated A powder dissolving liquid from the bottom of the A dry powder containing module, and then output it from the top of the A dry powder containing module and input it from the bottom of the A liquid containing module to the A liquid containing module in sequence, so as to complete a cycle of dissolution;

[0027] The A liquid detection module sequentially performs conductivity detection and optical detection and analysis on the A powder solution that has completed one cycle of dissolution, and repeats the above-mentioned cyclic dissolution steps until the conductivity and optical detection analysis results of the A powder solution meet the preset requirements and the number of cyclic dissolutions of the A powder solution meets the preset cycle number requirements, thereby determining that the A powder solution meets the liquid preparation requirements.

[0028] Furthermore, the A dry powder online liquid preparation method provided in the embodiment of the present invention further includes: when the conductivity and optical detection analysis results of the A powder solution meet the preset liquid preparation requirements, selecting to enter the A liquid use mode;

[0029] After the A liquid use mode ends, the A liquid containing module is controlled to return to the minimum volume state, and the circulating water circuit and the A liquid containing module are disinfected.

[0030] Beneficial effects:

[0031] (1) By adding a liquid A containing module, the dissolution of dry powder A is not limited to the dry powder A containing module. The solution flows in from the bottom of the dry powder A containing module and flows out from the top, and the solution flows in from the bottom of the liquid A containing module and flows out from the top, so that dry powder A can be fully dissolved. The dry powder A containing module is set to be wedge-shaped at the top and bottom, so that the top is convenient for air removal and the bottom is convenient for sufficient liquid discharge and dissolution, thereby reducing the residual liquid and dry powder.

[0032] (2) A heating module is provided to achieve heating dissolution and improve the dissolution efficiency; a liquid A detection module is provided to perform conductivity detection and optical detection on the A powder solution in real time, and the conductivity detection results and the optical detection results are analyzed to determine whether the A powder is fully dissolved; a circulating dissolution path is realized through the interconnected structure of the A dry powder containing module, the A liquid containing module, the water metering module, the circulating power module, the overflow module and the heating module, thereby further improving the dissolution efficiency and finally achieving the full dissolution of the A dry powder, and being able to effectively obtain the dialysate of accurate concentration to improve the reliability of the liquid preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the module structure of a dry powder online liquid preparation device provided in an embodiment of the present invention Figure 1 ;

[0034] Figure 2 A schematic diagram of the module structure of a dry powder online liquid preparation device provided in an embodiment of the present invention Figure 2 ;

[0035] Figure 3 A schematic diagram of the module structure of a dry powder online liquid preparation device provided in an embodiment of the present invention Figure 3 ;

[0036] Figure 4 A schematic diagram of the structure of a dry powder containing module of an A dry powder online liquid preparation device provided in an embodiment of the present invention Figure 1 ;

[0037] Figure 5 A schematic diagram of the structure of a dry powder containing module of an A dry powder online liquid preparation device provided in an embodiment of the present invention Figure 2 ;

[0038] Figure 6 A schematic diagram of the structure of a dry powder containing module of an A dry powder online liquid preparation device provided in an embodiment of the present invention Figure 3 ;

[0039] Figure 7 A schematic diagram of the structure of a dry powder containing module of an A dry powder online liquid preparation device provided in an embodiment of the present invention Figure 4 ;

[0040] Figure 8 A schematic diagram of the structure of a liquid containing module of an A dry powder online liquid dispensing device provided in an embodiment of the present invention Figure 1 ;

[0041] Fig. 9 A schematic diagram of the structure of a liquid containing module of an A dry powder online liquid dispensing device provided in an embodiment of the present invention Figure 2 ;

[0042] Fig.10 A schematic flow chart of the steps of a method for online liquid preparation of dry powder A provided in one embodiment of the present invention;

[0043] Fig.11 A schematic diagram of the dynamic change of dissolution sufficiency of an A dry powder online liquid preparation method provided in one embodiment of the present invention;

[0044] Fig.12 A schematic diagram of the change in solution conductivity of an A dry powder online liquid preparation method provided by a certain embodiment of the present invention;

[0045] Reference numerals: 101, A dry powder containing module; 102, A liquid containing module; 103, water metering module; 104, heating module; 105, A liquid detection module; 106, first solenoid valve group; 107, second solenoid valve group; 108, third solenoid valve group; 109, fourth solenoid valve group; 110, circulation power module; 111, overflow module; 112, control circuit module; 201, A dry powder barrel / bag; 202, variable volume A liquid chamber; 203, metering water tank; 204, flow pump; 205. Heater; 206. Conductivity detector; 207. Optical detector; 208. Temperature sensor; 209. Overflow valve; 2010. Air separation chamber; K1. First solenoid valve; K2. Second solenoid valve; K3. Third solenoid valve; K4. Fourth solenoid valve; 1. Bag body; 2. Support member; 21. Interface end; 22. Support rod; 3. Interface member; 31. Barrel body; 501. Motor; 502. Screw; 503. First wall panel; 504. Soft cavity; 505. Second wall panel. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Example 1

[0048] See also Figure 1 , Figure 1 A schematic diagram of the module structure of a dry powder online liquid preparation device provided in an embodiment of the present invention Figure 1 .like Figure 1As shown, the embodiment of the present invention proposes an A dry powder online liquid dispensing device, comprising: an A dry powder containing module 101, an A liquid containing module 102, a water metering module 103, a heating module 104, an A liquid detection module 105, a first solenoid valve group 106, a second solenoid valve group 107, a third solenoid valve group 108, a fourth solenoid valve group 109, a circulation power module 110, an overflow module 111 and a control circuit module 112; the top of the A dry powder containing module 101 is connected to the bottom water channel of the A liquid containing module 102, and the top of the A liquid containing module 102 is connected to the A liquid detection module 112. The module 105 is connected by water, the A liquid detection module 105 is connected by water to the first solenoid valve group 106, the water metering module 103 is connected by water to the circulation power module 110, the overflow module 111, the first solenoid valve group 106 and the second solenoid valve group 107, respectively, the circulation power module 110 is connected by water to the heating module 104, the heating module 104 is connected by water to the overflow module 111, the overflow module 111 is connected by water to the third solenoid valve group 108, and the fourth solenoid valve group 109 is connected by water to the third solenoid valve group 108 and the bottom water of the A dry powder containing module 101 respectively;

[0049] By designing the circulating dissolution path, the A dry powder can be fully dissolved, and by adding a dissolution path that flows in from the bottom of the A liquid containing module 102 and flows out from the top and a heating module 104, the residue of the A dry powder can be reduced and the dissolution efficiency can be accelerated. A specific implementation method is as follows: Figure 3 , Figure 3 A schematic diagram of the module structure of a dry powder online liquid preparation device provided in an embodiment of the present invention Figure 3 In this embodiment, the following Figure 3 A schematic diagram of the structure of a dry powder online liquid preparation device A used in hemodialysis equipment Figure 3 Combination Figure 1 The structure diagram of the dry powder online liquid dispensing device A is shown Figure 1The A dry powder online liquid dispensing device includes: A dry powder barrel / bag 201 (equivalent to A dry powder containing module 101), variable volume A liquid chamber 202 (equivalent to A liquid containing module 102), metering water tank 203 (equivalent to water metering module 103), flow pump 204 (equivalent to circulation power module 110), heater 205 (equivalent to heating module 104), conductivity detector 206 and optical detector 207 (the combination of which is equivalent to A liquid detection module 105), temperature sensor 208, overflow valve 209 and air separation chamber 2010 (the combination of which is equivalent to In the overflow module 111), the first solenoid valve K1 (equivalent to the first solenoid valve group 106), the second solenoid valve K2 (equivalent to the second solenoid valve group 107), the third solenoid valve K3 (equivalent to the third solenoid valve group 108), the fourth solenoid valve K4 (equivalent to the fourth solenoid valve group 109), etc.; it is worth mentioning that the first solenoid valve group 106, the second solenoid valve group 107, the third solenoid valve group 108 and the fourth solenoid valve group 109 can all be composed of one or several solenoid valves connected, and the number of solenoid valve settings can be adjusted according to the actual application scenario, which will not be repeated here.

[0050] The existing A dry powder barrels are usually very large, which leads to many problems in storage and transportation. The embodiment of the present invention proposes an A dry powder containing module 101, the bottom and top of the A dry powder containing module 101 are both wedge-shaped, and the bottom angle of the A dry powder containing module 101 is smaller than the top angle; the volume of the A dry powder containing module 101 is at least equal to a preset multiple of the volume of the A dry powder, the volume of the A dry powder containing module 101 is at most equal to the maximum volume of the A liquid containing module 102, and the top and bottom of the A dry powder containing module 101 are wedge-shaped. A filtering structure is arranged at the bottom; in the embodiment of the present invention, the A dry powder containing module 101 is used to store the A dry powder. The A dry powder containing module 101 can be set as an A dry powder barrel / bag 201. The A dry powder barrel / bag 201 can be used once, produced by the dialysis powder factory, and sealed. It is only unpacked and connected to the A dry powder bracket of the dialysis machine when it is needed. The A dry powder barrel / bag 201 can also be reused. If it is reused, it needs to be disinfected and cleaned; furthermore, the volume of the A dry powder barrel / bag 201 needs to be large enough, larger than 1 / 10 of the volume of the A dry powder. .5 times (equivalent to the preset multiple), so that the powder is concentrated in the lower part during the dissolution process, and the liquid flowing out of the upper part contains as little powder as possible to avoid clogging and wear of the gear pump; at the same time, the volume of the A dry powder barrel / bag 201 is as small as possible, smaller than the maximum volume of the variable volume A liquid chamber 202, and is sealed and packaged for easy transportation and storage. The shape characteristics of the A dry powder barrel / bag 201 are that the bottom and the top are wedge-shaped, and the angle of the bottom is smaller than the angle of the top. The wedge-shaped top is convenient for air discharge and prevents undissolved powder from flowing into the gear pump, and the large angle is convenient for volume increase; the wedge-shaped bottom with a small angle is convenient for liquid discharge and full dissolution; a layer of filtering structure is provided at the bottom of the A dry powder barrel / bag 201 to prevent powder leakage when the cover is removed and connected; a layer of filtering structure is also provided at the top of the A dry powder barrel / bag 201 to prevent powder from flowing out after being filled and overflowing; when in use, the A dry powder barrel / bag 201 is placed on the outside of the dialysis device and connected to the A dry powder bracket, which is similar to the existing mature B dry powder barrel installation method. The A dry powder bracket is provided with a detector to detect whether it is installed;

[0051] As an implementation method of this embodiment, see Figure 4 , Figure 4 A schematic diagram of the structure of a dry powder containing module of an A dry powder online liquid preparation device provided in an embodiment of the present invention Figure 1 ;like Figure 4 As shown, one of the A dry powder barrels / bags 201 is set as an A dry powder barrel, which includes: a barrel body 31 and two interface members 3, the interface members 3 are used to connect the A dry powder barrel with the dialysis equipment; the top and bottom of the barrel body 31 are wedge-shaped, and the filtering structure is arranged at the two ends of the barrel body 31 facing the two interface members 3;

[0052] As another possible implementation method of this embodiment, see Figures 5 to 7Another configuration of the A dry powder barrel / bag 201 is an A dry powder bag, which includes: a bag body 1, a support member 2 and two interface members 3, wherein the support member 2 is connected between the interface members 3 at the top and the bottom, and the support member 2 can be two interface ends 21 and at least one support rod 22, wherein the support rod 22 is disposed inside the bag body 1, and the two ends of the support rod 22 are respectively connected to the corresponding interface ends 21, and the two ends of the bag body 1 are sealed to the interface ends 21 by hot-melt connection; it is worth mentioning that, see Figure 6 The support rod 22 can be configured as mode 1: the connection between the two interface ends 21 and the support rod 22 is funnel-shaped, and the funnel-shaped structure of the interface end 21 is provided with a plurality of filter holes (i.e., filter structures), the funnel opening of the bottom interface end 21 is downward, and the funnel opening of the top interface end 21 is upward, wherein the support rod 22 can be a solid column or a tube structure with closed ends, and the support rod 22 does not allow liquid to pass through, ensuring that the liquid can only enter and exit the bag body 1 through the filter holes on the funnel-shaped structure of the interface end 21; see Figure 7 The support rod 22 can also be set as a second mode: the connection between the two interface ends 21 and the two support rods 22 is funnel-shaped, and the support rod 22 is a solid column or a tube structure with closed ends; in addition, if the support rod 22 is replaced by a support tube, the support tube is a support tube with multiple openings to facilitate the passage of liquid;

[0053] In order to better promote the dissolution of dry powder A, a method of increasing the dissolution path is adopted. For a specific implementation method, see Figure 8 and Fig. 9 The embodiment of the present invention provides an A liquid containing module 102, wherein the bottom and top of the A liquid containing module 102 are wedge-shaped; the top is wedge-shaped to facilitate air discharge, and the bottom is wedge-shaped to facilitate liquid discharge in the cavity; the A liquid containing module 102 comprises: a soft cavity 504 and two wall panels (equivalent to a first wall panel 503 and a second wall panel 505), the soft cavity 504 can change its volume along a first direction, the two wall panels are parallel and spaced apart along the first direction, and the first direction is: the direction in which the volume of the soft cavity 504 increases, such as Figure 8 and Fig. 9 As shown by the middle arrow; the soft cavity 504 is disposed between the two wall panels and connected to the two wall panels; the bottom of the soft cavity 504 is connected to the top water channel of the A dry powder barrel / bag 201; the top of the soft cavity 504 is connected to the conductivity detector 206 by water;

[0054] A specific implementation method is that the variable volume A liquid chamber 202 (equivalent to the A liquid containing module 102) is composed of a soft cavity (equivalent to the soft cavity 504) and two wall panels (equivalent to the first wall panel 503 and the second wall panel 505), wherein one applicable solution of the soft cavity is: the soft cavity adopts a structure similar to a hot water bag, and the two sides of the cavity are connected to the wall panels (such as bonding), so that the volume of the variable volume A liquid chamber 202 increases in a direction perpendicular to the direction in which the two wall panels squeeze the soft cavity; Figure 3 As shown, when the variable volume A liquid chamber 202 is in a larger volume, the distance between the two side walls is farther, otherwise it is closer; the soft cavity material can be made of fluororubber or silicone; in addition, since the volume of the variable volume A liquid chamber 202 is variable, it is in the maximum volume state during the preparation and dialysis treatment process, and together with the A dry powder barrel / bag 201, it is sufficient to accommodate one person's concentrated dialysis fluid. After the treatment, the variable volume A liquid chamber 202 is in the minimum volume state when the dialysis machine is cleaned and disinfected, which is convenient for shortening the disinfection and cleaning time; in addition, the variable volume A liquid chamber 202 (equivalent to the A liquid containing module 102) also includes: a motor 501 and a screw 502; the distance between the two wall panels can be controlled by the motor 501 and the screw 502, and the cavity can also be controlled to expand or shrink by the water pressure and the wall panels can be locked at the extreme position by an electromagnet, and the variable volume A liquid chamber 202 is fixedly placed inside the hemodialysis equipment.

[0055] In order to achieve degassing and exhaust during the dissolution cycle, thereby improving the dissolution efficiency of dry powder A, an overflow module 111 is provided in the present embodiment, and the overflow module 111 comprises: an air separation chamber 2010 and an overflow valve 209; the air separation chamber 2010 and the overflow valve 209 are in water communication, the air separation chamber 2010 is in water communication with the heating module 104, and the overflow valve 209 is in water communication with the water metering module 103; the air separation chamber is used to separate gas and liquid so that the gas is located above the liquid; the overflow valve 209 is used to overflow the gas and liquid to the water metering module 103 when the water pressure of the air separation chamber is greater than the back pressure of the overflow valve 209; the overflow module 111 has two passages: one flows from the air separation chamber 2010 back to the metering water tank 203 through the overflow valve 209, and the other flows from the air separation chamber 2010 through the third solenoid valve K3 and the fourth solenoid valve K4 to the bottom of the dry powder A containing module 101;

[0056] In order to accurately detect the degree of liquid solubility and improve the reliability of liquid preparation, the embodiment of the present invention further proposes an A liquid detection module 105, which is used to detect the sufficiency of dissolution and the qualification of ion concentration. The A liquid detection module 105 includes: a conductivity detector 206 and an optical detector 207, which are arranged between the top outlet of the variable-capacity A liquid chamber 202 and the first solenoid valve K1; the conductivity detector 206 can adopt a traditional concentrated liquid conductivity detection probe, and the conductivity detector 206 is arranged to detect the conductivity. By analyzing the change rate of the conductivity, it can be determined whether the A powder is still dissolving, and by detecting whether the conductivity of the liquid after dissolution is within a preset qualified range, it can be determined whether the ion concentration is qualified. The optical detector 207 adopts an optical detection method, which is composed of a light-emitting tube and a photoelectric receiving tube. The light-emitting tube emits light through the A powder solution, and by analyzing the change in the light intensity received by the photoelectric receiving tube, it can be determined whether the A powder is still dissolving.

[0057] The prior art is usually unable to monitor and control the water intake of the liquid preparation, which leads to the deviation of the accuracy of the A liquid configuration. In order to solve this technical defect, the embodiment of the present invention proposes a water metering module 103, and the water metering module 103 is provided with a float. The water metering module 103 is provided with at least two detection positions, an upper position and a lower position, to detect the position of the float to obtain a water level detection signal; an exhaust port and an air inlet are provided at the top of the water metering module 103. A specific possible implementation method is to set the water metering module 103 as a metering water tank 203, in which a float is installed. The float has at least two detection positions, an upper position and a lower position. An exhaust port and an air inlet are provided on the top of the water tank. The upper and lower position detections of the float of the metering water tank 203 can be used to realize the metering of the injection water for preparation, and the exhaust port is used to realize the discharge of air during the dissolution process. The exhaust port and the air inlet can realize the response to the overall volume fluctuation changes during the cyclic dissolution process. The bottom outlet of the metering water tank 203 is connected to the flow pump 204 (or a gear pump is used to provide circulation power). The metering water tank 203 is also connected to the first solenoid valve group 106 and the second solenoid valve group 107. The opening and closing of the second solenoid valve group 107 are controlled according to the water level detection signal, so that the amount of liquid in the circulation loop can be accurately controlled.

[0058] The embodiment of the present invention provides an A dry powder online liquid preparation device, which has a circuit connection in addition to the water connection. Figure 2 , Figure 2 A schematic diagram of the module structure of a dry powder online liquid preparation device provided in an embodiment of the present invention Figure 2 ;like Figure 2As shown, the A dry powder containing module 101, the A liquid containing module 102, the water metering module 103, the heating module 104, the A liquid detection module 105, the first solenoid valve group 106, the second solenoid valve group 107, the third solenoid valve group 108, the fourth solenoid valve group 109, and the circulation power module 110 are all electrically connected to the control circuit module 112; the control circuit module 112 is used to receive the installation completion signal of the A dry powder containing module 101, the control circuit module 112 is used to send a control signal to control the A liquid containing module 102 to change the volume, and the control circuit module 112 is used to The water level detection signal of the water metering module 103 is received, and the control circuit module 112 is used to control the heating module 104 to heat the liquid in the water circuit. The control circuit module 112 is used to control the A liquid detection module 105 to detect the liquid in the water circuit. The control circuit module 112 is used to control the opening and closing of the first solenoid valve group 106, the second solenoid valve group 107, the third solenoid valve group 108 and the fourth solenoid valve group 109. The control circuit module 112 is used to control the circulation power module 110 to transport the liquid in the water metering module 103 to the heating module 104. A specific implementation method is provided with a control system (equivalent to the control circuit module 112), which is used to receive the signal that the A dry powder barrel / bag 201 (equivalent to the A dry powder containing module 101) is installed, receive the water volume metering signal of the metering water tank 203 and receive the temperature signal of the temperature sensor 208, and is also used to control the heating of the heater 205, and control the on and off of the first solenoid valve K1, the second solenoid valve K2, the third solenoid valve K3 and the fourth solenoid valve K4; the control system can select to enter the A liquid preparation mode and the A liquid use mode according to the received parameters;

[0059] It is worth mentioning that the metering water tank 203, flow pump 204, heater 205, temperature sensor 208, overflow valve 209 and control system (equivalent to control circuit module 112) etc. proposed in this embodiment can be shared with the same components inside the dialysis equipment, and can also be embedded in the water system of the dialysis equipment, wherein the connection between the water inlet end of the metering water tank 203 and the outlet end of the heater 205 is shared with the dialysis equipment, and the bottom of the A dry powder barrel / bag 201 is connected to the A liquid suction end of the dialysis equipment; through the shared components, only the variable volume A liquid chamber 202, conductivity detector 206, optical detector 207 and 2 solenoid valves need to be added to the original dialysis equipment.

[0060] The embodiment of the present invention proposes an A dry powder online liquid dispensing device. By adding an A liquid containing module 102, the dissolution of A dry powder is not limited to the A dry powder containing module 101. The solution flows in from the bottom of the A dry powder containing module 101 and flows out from the top, and flows in from the bottom of the A liquid containing module 102 and flows out from the top. The A dry powder can be fully dissolved, and the A dry powder containing module 101 is set to be wedge-shaped at the top and bottom, so that the top is convenient for air removal and the bottom is convenient for sufficient liquid discharge and dissolution, thereby reducing the residue of liquid and dry powder. The heating module 104 is set to achieve Heat to dissolve and improve the dissolution efficiency; set up the A liquid detection module 105 to perform conductivity detection and optical detection on the A powder solution in real time, and analyze the conductivity detection results and the optical detection results to determine whether the A powder is fully dissolved; through the connection structure of the A dry powder containing module 101, the A liquid containing module 102, the water metering module 103, the circulation power module 110, the overflow module 111 and the heating module 104, a circulation dissolution path is realized to further improve the dissolution efficiency, and finally achieve the full dissolution of the A dry powder, and can effectively obtain the accurate concentration of the dialysate to improve the reliability of the liquid preparation.

[0061] Based on the A dry powder online liquid preparation device proposed in the embodiment of the present invention, a corresponding A dry powder online liquid preparation method can be executed, and its principle is as follows: Fig.10 , Fig.10 A schematic flow chart of the steps of a method for online liquid preparation of dry powder A provided in one embodiment of the present invention. Fig.10 As shown, the embodiment of the present invention provides an A dry powder online liquid preparation method, including steps 701 to 706, each step is specifically as follows:

[0062] Step 701, receiving the installation completion signal of the A dry powder containing module, and selecting to enter the A liquid preparation mode;

[0063] As an example of this embodiment, when the A dry powder barrel / bag 201 is installed on the A dry powder bracket, the device can detect through the position detector that the A dry powder barrel / bag 201 has been installed, and send an installation completion signal to the control circuit module 112. The information on the preparation of A liquid appears on the interface of the control circuit module 112. After confirmation, the control circuit module 112 starts the A concentrated liquid preparation program to dissolve the A dry powder as a whole at one time; before the control circuit module 112 is started, the system will also use its own conductivity detection system to determine whether the liquid in the water tank has been fully cleaned and no longer contains dialysate, and then send a control signal to control the opening of the second solenoid valve K2, the flow pump 204 and the heater 205.

[0064] Step 702, receiving the water level detection signal of the water metering module in real time, and when the water level detection signal meets the preset metering requirement, controlling the second solenoid valve group 107 to close and controlling the circulation power module 110 to transport the liquid in the water metering module to the heating module;

[0065] As an example of this embodiment, the water level in the water metering module is measured and detected by the number of times the float of the water metering module moves to obtain a water level detection signal; during the liquid circulation dissolution process, when the water level detection signal result does not meet the preset metering requirements, the second solenoid valve group 107 is controlled to open; when the water level detection signal meets the preset metering requirements, the second solenoid valve group 107 is controlled to close; specifically, the volume of the incoming water is measured by the number of times the float of the metering water tank 203 moves to ensure the injection of an accurate amount of water. When the total amount of the metering water tank 203 reaches the amount of water required for preparing liquid A, the water inlet solenoid valve is closed and the filling process ends; an application explanation is that when the number of times the float moves reaches the number of times the preset water inlet volume is required, a water volume satisfaction signal is sent to the control circuit module 112, and the control circuit module 112 controls the second solenoid valve K2 of the water inlet to close; furthermore, the heater 205 controls the heating temperature to be close to or slightly higher than the normal dialysate temperature, such as 37-41°C, and the injection of the heated water can greatly shorten the dissolution time, especially in seasons with lower temperatures;

[0066] Step 703, controlling the heating module to heat the liquid in the water channel. When the temperature of the liquid in the water channel meets the preset requirement, controlling the third solenoid valve group 108 and the fourth solenoid valve group 109 to open, inputting the liquid from the bottom of the A dry powder containing module to dissolve the A dry powder to obtain A powder dissolved liquid;

[0067] As an example of this embodiment, the heater 205 is controlled to heat the liquid in the water path. When the water temperature detected by the temperature sensor 208 reaches the preset requirement, the third solenoid valve and the fourth solenoid valve are opened, so that the filled hot water enters from the bottom of the A dry powder barrel / bag 201, and the undissolved A powder sinks to the lower part of the A dry powder barrel / bag 201 due to the effect of gravity, which makes the dissolution effect optimal; after the A dry powder barrel / bag 201 is filled, since the container volume is greater than 1.5 times the volume of A powder, the powder is concentrated in the lower part, so the liquid overflowing from the wedge-shaped top outlet contains the least undissolved powder, and the A powder dissolved liquid is obtained;

[0068] Step 704, inputting the A powder dissolving liquid from the top of the A dry powder containing module to the bottom of the A liquid containing module, and outputting it from the top of the A liquid containing module;

[0069] As an example of this embodiment, the A powder dissolving liquid further flows into the variable volume A liquid chamber 202, also entering from the wedge-shaped bottom. After a small amount of undissolved powder enters the variable volume A liquid chamber 202, it is first concentrated in the lower part of the variable volume A liquid chamber 202 and output from the top of the A liquid containing module 102.

[0070] Step 705, controlling the A liquid detection module to sequentially perform conductivity detection and optical detection on the A powder dissolved liquid output from the top of the A liquid containing module;

[0071] As an example of this embodiment, after the filling is completed, the flow pump 204 continues to operate, and the A powder solution flows out from the wedge-shaped top of the variable-capacity A liquid chamber 202, containing less undissolved powder, thereby avoiding wear on the gear pump, etc., and at the same time preferentially exhausting the air. After the A powder solution flows out of the variable-capacity A liquid chamber 202, it passes through the conductivity detector 206 and the optical detector 207 and then returns to the metering water tank 203, thereby entering the circulation dissolution stage.

[0072] Step 706, control the first solenoid valve group to open, and circulate and dissolve the A powder solution that has completed the conductivity detection and optical detection, until the conductivity and optical detection analysis results of the A powder solution meet the preset requirements and the number of cyclic dissolutions of the A powder solution meets the preset cycle number requirements, and determine that the A powder solution meets the liquid preparation requirements.

[0073] As an example of this embodiment, the first solenoid valve group is controlled to be opened, and the A powder solution whose conductivity and optical detection analysis results do not meet the preset detection requirements is transported to the water metering module through the bottom of the A liquid containing module; the circulation power module is controlled to transport the A powder solution in the water metering module to the heating module for heating and dissolution to obtain the heated A powder solution; the third solenoid valve group and the fourth solenoid valve group are controlled to be opened, and the heated A powder solution is input from the bottom of the A dry powder containing module, and then output from the top of the A dry powder containing module and input from the bottom of the A liquid containing module to the A liquid containing module in sequence to complete a cycle of dissolution; the A powder solution that has completed a cycle of dissolution is sequentially subjected to conductivity detection and optical detection by the A liquid detection module, the control circuit module 112 analyzes and processes the conductivity and optical detection information of the A liquid detection module, and the above-mentioned cyclic dissolution steps are repeated until the conductivity and optical detection analysis results of the A powder solution meet the preset requirements and the number of cyclic dissolutions of the A powder solution meets the preset number of cycles, and it is determined that the A powder solution meets the liquid preparation requirements. Specifically, when entering the circulation dissolution stage, the heater 205 is appropriately turned off, or slightly heated at a low power (for example, maintaining 37-41°C) to prevent the volatile components in the A powder from volatilizing; the A powder dissolving liquid is continuously circulated and dissolved based on the water flow path, from the A dry powder containing module 101 to the A liquid containing module 102, then to the water metering module 103, and then to the circulation power module 110, the heating module 104 and the overflow module 111, and then back to the A dry powder containing module 101, and so on. Each time the liquid flows through the conductivity detector 206 and the optical detector 207, conductivity detection and optical detection will be performed, and the detection signal will be sent to the control circuit module Block 112, the control circuit module 112 analyzes the rate of change of conductivity and the rate of change of the light intensity received by the photoelectric receiving tube to determine whether the A powder is fully dissolved. If the A powder is fully dissolved, the control circuit module 112 determines whether the conductivity is within the qualified range. If the conductivity is unqualified, the dissolution is terminated and an alarm is issued. If the conductivity is qualified, it is determined whether the number of cycles is greater than 2. When the number of cycles is greater than 2, the control circuit module 112 sends a control signal to sequentially close the second solenoid valve K2, the third solenoid valve K3 and the fourth solenoid valve K4, so that the A powder solution is stored in the variable-volume A liquid chamber 202 and the A dry powder barrel / bag 201 for standby use.

[0074] During the circulation dissolution process, the A liquid detection module 105 outputs the optical detection signal and the conductivity detection signal of the A powder solution to the control circuit module 112 in real time. The control circuit module 112 analyzes the conductivity change rate, the light intensity signal change rate received by the photoelectric receiving tube, and whether the conductivity falls within the qualified range, and obtains the solubility analysis results of the A powder solution and the results of whether the ion concentration is qualified; when the solubility analysis results and the ion concentration results of the A powder solution meet the preset liquid preparation requirements, select to enter the A liquid use mode; after the A liquid use mode ends, control the A liquid holding module 102 to restore to the minimum volume state, and disinfect the circulating water circuit and the A liquid holding module 102. Specifically, during the circulation dissolution stage, the control circuit module 112 collects the light intensity received by the photoelectric receiving tube (i.e., the AD value at the receiving end) in real time, and then processes and analyzes the collected data to calculate the light intensity change rate. Fig.11 A schematic diagram of the dynamic change of dissolution sufficiency of an A dry powder online liquid preparation method provided in an embodiment of the present invention, such as Fig.11 As shown in the figure, as the dissolution time changes, the powder particle content in the liquid gradually decreases, the light intensity received by the photoelectric receiving tube increases, and the light intensity change rate gradually approaches 0, so the light intensity change rate received by the photoelectric receiving tube can reflect the degree of particle dissolution; in addition, the control circuit module 112 of the cyclic dissolution stage collects the conductivity data of the A powder solution detected by the conductivity detector 206, processes and analyzes the collected data, calculates the conductivity change rate, and determines whether the conductivity falls within the preset qualified range. Fig.12 A schematic diagram of the change in solution conductivity of a dry powder online liquid preparation method A provided in an embodiment of the present invention, such as Fig.12 As shown, as the dissolution time changes, the solution conductivity increases, and the conductivity change rate gradually approaches 0, so the conductivity change rate can reflect the degree of particle dissolution. After the change rate of the light intensity received by the photoelectric receiving tube and the change rate of the conductivity detected by the conductivity detector 206 meet the requirements and the conductivity of the A powder solution meets the preset conductivity qualified range requirements, the cyclic dissolution process is ended, the A solution is prepared, and stored in the A liquid chamber and the A powder barrel / bag for standby use. In one application case, the above dissolution process can be interspersed in the process of power-on self-test of the hemodialysis equipment.

[0075] The embodiment of the present invention proposes an A dry powder online liquid preparation method, which adopts the variable volume A liquid chamber technology. The dissolution and liquid preparation are not limited to the A powder tube, so that the volume of the A powder tube or the powder bag can be small, and the transportation and storage are convenient, which meets the use requirements; the technology of overall dissolution and one-time dissolution of A dry powder is also adopted, so that the dissolution is sufficient and the ion concentration is qualified, which meets the basic requirements of liquid preparation; the variable volume A liquid chamber technology and the circulating dissolution loop heating technology are also adopted, which can realize thermal disinfection and chemical disinfection, and the disinfection time is shortened, which meets the basic requirements of actual clinical use; the water tank metering technology is also adopted, which has a metering function and can meter the added reverse osmosis The volume of water meets the basic requirements for liquid preparation so that liquid A can be accurately prepared; the solubility sufficiency monitoring technology is also adopted, which is combined with the traditional conductivity detection technology and dynamic algorithm to effectively detect whether the solution is fully dissolved; the air separation and degassing technology is also adopted to achieve the necessary degassing requirements during the dry powder dissolution process; the hot water dissolution technology is also used to shorten the dissolution time of dry powder A to less than 10 minutes, so that it can be put into use quickly when needed, meeting the basic needs of actual use; through the application of the above technologies, the dry powder A can be fully dissolved in a short time, the accurate concentration of dialysate can be effectively obtained and the reliability of liquid preparation can be improved.

[0076] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0078] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

Claims

1. A dry powder online liquid preparation device, characterized in that: include: A dry powder containing module, A liquid containing module, a water metering module, a heating module, an A liquid detection module, a first solenoid valve group, a second solenoid valve group, a third solenoid valve group, a fourth solenoid valve group, a circulation power module, an overflow module and a control circuit module; The top of the A dry powder containing module is in communication with the bottom water channel of the A liquid containing module, the top of the A liquid containing module is in communication with the A liquid detection module water channel, the A liquid detection module is in communication with the first electromagnetic valve group water channel, the water metering module is in communication with the circulation power module, the overflow module, the first electromagnetic valve group and the second electromagnetic valve group water channels respectively, the circulation power module is in communication with the heating module water channel, the heating module is in communication with the overflow module water channel, the overflow module is in communication with the third electromagnetic valve group water channel, and the fourth electromagnetic valve group is in communication with the third electromagnetic valve group and the bottom water channel of the A dry powder containing module respectively; The A dry powder containing module, the A liquid containing module, the water metering module, the heating module, the A liquid detection module, the first solenoid valve group, the second solenoid valve group, the third solenoid valve group, the fourth solenoid valve group, and the circulating power module are all electrically connected to the control circuit module; the control circuit module is used to receive the installation completion signal of the A dry powder containing module, the control circuit module is used to send a control signal to control the A liquid containing module to change the volume, the control circuit module is used to receive the water level detection signal of the water metering module, the control circuit module is used to control the heating module to heat the liquid in the water circuit, the control circuit module is used to control the A liquid detection module to detect the liquid in the water circuit, the control circuit module is used to control the opening and closing of the first solenoid valve group, the second solenoid valve group, the third solenoid valve group and the fourth solenoid valve group, and the control circuit module is used to control the circulating power module to transport the liquid in the water metering module to the heating module.

2. A dry powder online liquid preparation device according to claim 1, characterized in that: The bottom and top of the A dry powder containing module are both wedge-shaped, and the bottom angle of the A dry powder containing module is smaller than the top angle; the bottom and top of the A liquid containing module are wedge-shaped.

3. A dry powder online liquid preparation device as claimed in claim 1, characterized in that: The volume of the A dry powder containing module is at least equal to a preset multiple of the volume of the A dry powder, and the volume of the A dry powder containing module is at most equal to the maximum volume of the A liquid containing module.

4. A dry powder online liquid preparation device as claimed in claim 1, characterized in that: The A liquid containing module includes: a soft cavity and two wall plates, the soft cavity can change its volume along a first direction, the two wall plates are arranged parallel and spaced apart along the first direction, and the soft cavity is arranged between the two wall plates and connected to the two wall plates.

5. The A dry powder online liquid preparation device as claimed in claim 1, characterized in that: The overflow module comprises: an air separation chamber and an overflow valve; the air separation chamber and the overflow valve are in water communication, the air separation chamber is in water communication with the heating module, and the overflow valve is in water communication with the water metering module; The air separation chamber is used to separate gas and liquid so that the gas is located above the liquid; the overflow valve is used to overflow the gas and liquid to the water metering module when the water pressure in the air separation chamber is greater than the back pressure of the overflow valve.

6. A dry powder online liquid preparation device as claimed in claim 1, characterized in that: The water metering module is provided with a float, and the water metering module is provided with at least two detection positions, an upper position and a lower position, to detect the position of the float to obtain a water level detection signal; an exhaust port and an air inlet are provided on the top of the water metering module.

7. A method for preparing a dry powder on-line, characterized in that: A dry powder online liquid preparation device A as claimed in any one of claims 1 to 6, comprising: Receiving the installation completion signal of the A dry powder containing module and selecting to enter the A liquid preparation mode; receiving a water level detection signal from a water metering module in real time, and when the water level detection signal meets a preset metering requirement, controlling the second solenoid valve group to close and controlling the circulation power module to transport the liquid in the water metering module to the heating module; Control the heating module to heat the liquid in the water channel, and when the temperature of the liquid in the water channel meets the preset requirements, control the third solenoid valve group and the fourth solenoid valve group to open, input the liquid from the bottom of the A dry powder containing module, dissolve the A dry powder, and obtain the A powder dissolved liquid; Inputting the A powder dissolving liquid from the top of the A dry powder containing module to the bottom of the A liquid containing module, and outputting it from the top of the A liquid containing module; Controlling the A liquid detection module to sequentially perform conductivity detection and optical detection on the A powder dissolved liquid output from the top of the A liquid containing module; The first solenoid valve group is controlled to open, and the A powder solution that has completed the conductivity detection and optical detection is circulated and dissolved until the conductivity and optical detection analysis results of the A powder solution meet the preset requirements and the number of cyclic dissolutions of the A powder solution meets the preset cycle number requirements, and it is determined that the A powder solution meets the liquid preparation requirements.

8. A method for preparing a dry powder on-line as claimed in claim 7, characterized in that: Also includes: The water metering module is provided with a float; The water level in the water metering module is measured and detected by the number of times the float of the water metering module moves, so as to obtain a water level detection signal; During the liquid circulation dissolution process, when the water level detection signal result does not meet the preset metering requirement, the second solenoid valve group is controlled to open; When the water level detection signal meets the preset metering requirement, the second solenoid valve group is controlled to close.

9. A method for preparing a dry powder liquid online as claimed in claim 7, characterized in that: Controlling the first solenoid valve group to open, circulate and dissolve the A powder solution that has completed the conductivity detection and the optical detection, until the conductivity and optical detection analysis results of the A powder solution meet the preset requirements and the number of cyclic dissolutions of the A powder solution meets the preset cycle number requirements, and determining that the A powder solution meets the liquid preparation requirements, including: Controlling the first solenoid valve group to open, and delivering the A powder dissolved liquid whose conductivity and optical detection analysis results do not meet the preset requirements to the water metering module through the bottom of the A liquid containing module; Controlling the circulation power module to transport the A powder solution in the water metering module to the heating module for heating and dissolution, thereby obtaining a heated A powder solution; Control the third solenoid valve group and the fourth solenoid valve group to open, input the heated A powder dissolving liquid from the bottom of the A dry powder containing module, and then output it from the top of the A dry powder containing module and input it from the bottom of the A liquid containing module to the A liquid containing module in sequence, so as to complete a cycle of dissolution; The A liquid detection module sequentially performs conductivity detection and optical detection and analysis on the A powder solution that has completed one cycle of dissolution, and repeats the above-mentioned cyclic dissolution steps until the conductivity and optical detection analysis results of the A powder solution meet the preset requirements and the number of cyclic dissolutions of the A powder solution meets the preset cycle number requirements, thereby determining that the A powder solution meets the liquid preparation requirements.

10. A method for preparing a dry powder on-line according to any one of claims 7 to 9, characterized in that: Also includes: When the conductivity and optical detection analysis results of the A powder solution meet the preset solution requirements, enter the A solution use mode; After the A liquid use mode ends, the A liquid containing module is controlled to return to the minimum volume state, and the circulating water circuit and the A liquid containing module are disinfected.

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