Liquid cartridge for peritoneal dialysis machine and peritoneal dialysis machine

Abstract

The application relates to a liquid card for a peritoneal dialysis machine, and the peritoneal dialysis machine, wherein the liquid card comprises a base and a soft diaphragm, a first side of the base is provided with a plurality of mutually independent liquid grooves and two mutually independent pump grooves, and a second side of the base is provided with a plurality of flow grooves; a cylindrical valve seat is arranged in each liquid groove; when the soft diaphragm is compressed on the wall surfaces of the first side and the second side of the base, the plurality of liquid grooves, pump grooves and flow grooves can be sealed to form mutually independent perfusion valve cavities, liquid supplement valve cavities, human body communication valve cavities, waste liquid valve cavities, left pump first valve cavities, left pump second valve cavities, right pump first valve cavities, right pump second valve cavities, left pump chambers, right pump chambers, left pump flow channels, right pump flow channels, first flow channels and second flow channels. The liquid card of the peritoneal dialysis machine can overcome the defects of the existing liquid card, such as the need to set more valves and channels and the complex structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of peritoneal dialysis, in particular to a liquid cassette for peritoneal dialysis machine and peritoneal dialysis machine. BACKGROUND

[0002] Automated peritoneal dialysis is an important means of kidney replacement therapy, which is increasingly concerned due to its advantages of convenient use, flexible dialysis dosage, strong small molecule solute removal capacity, and good social regression of patients. Peritoneal dialysis machine is the core device or equipment for realizing automated peritoneal dialysis treatment. Generally, peritoneal dialysis machines can be divided into pressure control type, gravity control type and mixed control type according to the power source of filling and draining, and the currently commonly used type in clinic is pressure control type. The existing pressure control type or mixed control type peritoneal dialysis machine drives the opening and closing of the electromagnetic valve on the liquid circuit of the cassette through the pressure of gas to guide the flow route of the liquid in the cassette, thereby realizing the processes of dialysate filling, fluid supplementing and draining or waste discharging. A large number of valves and channels need to be arranged in the liquid cassette, and the structure is very complex. SUMMARY

[0003] The present application provides a liquid cassette for peritoneal dialysis machine, which can overcome the shortcomings of the existing liquid cassette, such as the need to arrange a large number of valves and channels and the complex structure.

[0004] The liquid cassette for peritoneal dialysis machine of the present application comprises a base body and a soft diaphragm covering the wall surface of the first side and the wall surface of the second side of the base body, the first side and the second side are opposite, the first side of the base body is provided with a plurality of mutually independent liquid grooves recessed relative to the wall surface thereof and two mutually independent pump grooves, and the second side of the base body is provided with a plurality of flow-through grooves recessed relative to the wall surface thereof.

[0005] Each of the liquid grooves is provided with a cylindrical valve seat, the valve seat has a through hole in communication with the liquid groove at one end and with one of the flow-through grooves at the other end, and the distance between the end of the valve seat away from the reference and the reference is less than the distance between the wall surface of the first side of the base body and the reference, with the bottom wall of the liquid groove as the reference.

[0006] When the soft diaphragm is compressed against the wall surfaces of the first side and the second side of the base body, it can seal a plurality of the liquid grooves to form mutually independent filling valve cavities, fluid supplementing valve cavities, human body communication valve cavities, waste liquid valve cavities, left pump first valve cavities, left pump second valve cavities, right pump first valve cavities, right pump second valve cavities, and seal the two pump grooves to form mutually independent left pump chambers and right pump chambers, and seal a plurality of flow-through grooves to form mutually independent left pump flow-through channels, right pump flow-through channels, first flow-through channels and second flow-through channels, and the base body is further provided with a plurality of connector holes in one-to-one correspondence with the filling valve cavities, the fluid supplementing valve cavities, the human body communication valve cavities and the waste liquid valve cavities.

[0007] wherein the valve seat in the perfusion valve cavity and the valve seat in the waste liquid valve cavity are both communicated with the first flow channel, the valve seat in the liquid supplement valve cavity and the valve seat in the human body communication valve cavity are both communicated with the second flow channel, the valve seat in the left pump first valve cavity and the valve seat in the left pump second valve cavity are both communicated with the left pump flow channel, the valve seat in the right pump first valve cavity and the valve seat in the right pump second valve cavity are both communicated with the right pump flow channel, the left pump first valve cavity and the right pump first valve cavity are respectively communicated with the first flow channel, the left pump second valve cavity and the right pump second valve cavity are respectively communicated with the second flow channel, the left pump chamber is communicated with the left pump flow channel, and the right pump chamber is communicated with the right pump flow channel.

[0008] As a preferred, the cassette includes three liquid supplement valve cavities. Four of the perfusion valve cavity, the human body communication valve cavity, the waste liquid valve cavity and the three liquid supplement valve cavities are arranged at the leftmost end of the cassette along the width direction of the leftmost end of the cassette, and the four cavities are communicated with the four corresponding tube holes on the first side of the base body, and the other two cavities are arranged at the right side of the four cavities along the width direction of the cassette, the second side of the base body is provided with two liquid inlet channels, the two liquid inlet channels are communicated with the two corresponding cavities, and the two liquid inlet channels are communicated with the two corresponding tube holes on the second side of the base body, and the tube holes are all arranged at the leftmost end of the base body. The two cavities are respectively the perfusion valve cavity and one of the three liquid supplement valve cavities.

[0009] As a preferred, the left pump chamber and the right pump chamber are elliptical, and the depth of the middle part of the left pump chamber and the right pump chamber is greater than the depth of the edge, the left pump first valve cavity and the left pump second valve cavity are located at the left side of the left pump chamber, the left pump flow channel is opposite to the edge of the left pump chamber close to the left pump first valve cavity and the left pump second valve cavity, the right pump first valve cavity and the right pump second valve cavity are located between the left pump chamber and the right pump chamber, and the right pump flow channel is opposite to the edge of the right pump chamber close to the right pump first valve cavity and the right pump second valve cavity.

[0010] As a preferred, the base body is provided with a communication hole communicating the first side and the second side of the base body at the positions where the two liquid inlet channels are respectively opposite to the other two cavities, the left pump first valve cavity is opposite to the first flow channel, the right pump first valve cavity is opposite to the first flow channel, the left pump second valve cavity is opposite to the second flow channel, the right pump second valve cavity is opposite to the second flow channel, the left pump chamber is opposite to the left pump flow channel, and the right pump chamber is opposite to the right pump flow channel. The base body is integrally formed by injection molding.

[0011] Preferably, the base has a first vertical wall surface perpendicular to the wall surface of the first side and a second vertical wall surface opposite to the first vertical wall surface, both of which are connected to the left end and the right end of the cassette, and the right part of the first vertical wall surface is closer to the second vertical wall surface than the left part.

[0012] Preferably, the cassette comprises two soft diaphragms, each of which is bonded to the edge of the side surface of the base on one side.

[0013] The application also provides a peritoneal dialysis machine comprising a pressure control device and a cassette as described above, wherein the pressure control device comprises a gas cylinder and a pneumatic device connected to the gas cylinder through a gas pipe, and the pneumatic device drives the soft diaphragm of the cassette to press against or move away from the base under the pressure of the gas output by the gas cylinder. The pneumatic device comprises a first pneumatic component having a frame structure matched with the wall surface of the first side and the wall surface of the second side of the base; the pneumatic device further comprises a plurality of second pneumatic components corresponding to the plurality of valve seats; the pneumatic device further comprises a third pneumatic component corresponding to the left pump chamber and a fourth pneumatic component corresponding to the right pump chamber.

[0014] Preferably, the gas cylinder comprises a bottle body and a cover body, and the bottle body is provided with:

[0015] an air inlet channel for communicating with the positive pressure end of the air pump;

[0016] a large positive pressure gas cavity;

[0017] an air inlet hole of a large positive pressure gas cavity inlet electromagnetic valve, one end of which is connected to the air inlet channel, and the other end is used for connecting with the I port of the large positive pressure gas cavity inlet electromagnetic valve;

[0018] an air outlet hole of the large positive pressure gas cavity inlet electromagnetic valve, one end of which is used for connecting with the II port of the large positive pressure gas cavity inlet electromagnetic valve, and the other end is connected to the large positive pressure gas cavity;

[0019] a large positive pressure channel communicating with the large positive pressure gas cavity;

[0020] a plurality of air inlet holes of liquid path control electromagnetic valves, one end of each of the plurality of air inlet holes of liquid path control electromagnetic valves respectively communicating with the large positive pressure channel, and the other end being used for connecting with the I port of the plurality of liquid path control electromagnetic valves one by one;

[0021] a large negative pressure channel connected to the III port of the plurality of liquid path control electromagnetic valves;

[0022] a plurality of air outlet holes of liquid path control electromagnetic valves, one end of each of the plurality of air outlet holes of liquid path control electromagnetic valves respectively communicating with the large negative pressure channel, and the other end being used for connecting with the III port of the plurality of liquid path control electromagnetic valves one by one;

[0023] large negative pressure air cavity, in communication with the large negative pressure air passage;

[0024] air return passage, one end of which is in communication with the negative pressure end of the air pump;

[0025] air inlet hole of the large negative pressure air cavity air inlet electromagnetic valve, one end of which is in communication with the large negative pressure air cavity, and the other end of which is connected with the II port of the large negative pressure air cavity air inlet electromagnetic valve;

[0026] air outlet hole of the large negative pressure air cavity air inlet electromagnetic valve, one end of which is connected with the III port of the large negative pressure air cavity air inlet electromagnetic valve, and the other end of which is in communication with the air return passage;

[0027] small positive pressure air cavity;

[0028] air inlet hole of the small positive pressure air cavity air inlet electromagnetic valve, one end of which is connected with the air inlet passage, and the other end of which is connected with the I port of the small positive pressure air cavity air inlet electromagnetic valve;

[0029] air outlet hole of the small positive pressure air cavity air inlet electromagnetic valve, one end of which is connected with the II port of the small positive pressure air cavity air inlet electromagnetic valve, and the other end of which is connected with the small positive pressure air cavity;

[0030] left pump chamber passage, in communication with the driver of the membrane of the left pump chamber of the liquid pump;

[0031] right pump chamber passage, in communication with the driver of the membrane of the right pump chamber of the liquid pump;

[0032] air inlet hole of the small positive pressure air cavity air outlet first electromagnetic valve, one end of which is connected with the small positive pressure air cavity, and the other end of which is connected with the I port of the small positive pressure air cavity air outlet first electromagnetic valve;

[0033] air outlet hole of the small positive pressure air cavity air outlet first electromagnetic valve, one end of which is connected with the II port of the small positive pressure air cavity air outlet first electromagnetic valve, and the other end of which is in communication with the left pump chamber passage;

[0034] air inlet hole of the small positive pressure air cavity air outlet second electromagnetic valve, one end of which is connected with the small positive pressure air cavity, and the other end of which is connected with the I port of the small positive pressure air cavity air outlet second electromagnetic valve;

[0035] air outlet hole of the small positive pressure air cavity air outlet second electromagnetic valve, one end of which is connected with the II port of the small positive pressure air cavity air outlet second electromagnetic valve, and the other end of which is in communication with the right pump chamber passage;

[0036] small negative pressure air cavity;

[0037] air inlet hole of the small negative pressure air cavity air inlet first electromagnetic valve, one end of which is in communication with the left pump chamber passage, and the other end of which is connected with the II port of the small negative pressure air cavity air inlet first electromagnetic valve;

[0038] The outlet hole of the small negative pressure air chamber intake first electromagnetic valve, one end of which is connected with the III port of the small negative pressure air chamber intake first electromagnetic valve, and the other end of which communicates with the small negative pressure air chamber;

[0039] The inlet hole of the small negative pressure air chamber intake second electromagnetic valve, one end of which communicates with the right pump chamber passage, and the other end of which is connected with the II port of the small negative pressure air chamber intake second electromagnetic valve;

[0040] The outlet hole of the small negative pressure air chamber intake second electromagnetic valve, one end of which is connected with the III port of the small negative pressure air chamber intake second electromagnetic valve, and the other end of which communicates with the small negative pressure air chamber;

[0041] The inlet hole of the small negative pressure air chamber back gas electromagnetic valve, one end of which communicates with the small negative pressure air chamber, and the other end of which is connected with the II port of the small negative pressure air chamber back gas electromagnetic valve;

[0042] The outlet hole of the small negative pressure air chamber back gas electromagnetic valve, one end of which is connected with the III port of the small negative pressure air chamber back gas electromagnetic valve, and the other end of which communicates with the back gas passage;

[0043] The large positive pressure air chamber, the large negative pressure air chamber, the small positive pressure air chamber and the small negative pressure air chamber are independent of each other, and the cover body respectively forms a sealed closure for the large positive pressure air chamber, the large negative pressure air chamber, the small positive pressure air chamber and the small negative pressure air chamber;

[0044] The gas cylinder further comprises the large positive pressure air chamber intake electromagnetic valve, the plurality of liquid path control electromagnetic valves, the large negative pressure air chamber back gas electromagnetic valve, the small positive pressure air chamber intake electromagnetic valve, the small positive pressure air chamber outlet first electromagnetic valve, the small positive pressure air chamber outlet second electromagnetic valve, the small negative pressure air chamber intake first electromagnetic valve, the small negative pressure air chamber intake second electromagnetic valve and the small negative pressure air chamber back gas electromagnetic valve, and the gas cylinder further comprises a circuit board arranged on the bottle body, and the circuit board is provided with a controller connected with each electromagnetic valve and gas pump respectively so as to control each electromagnetic valve and gas pump.

[0045] Preferably, the gas cylinder is further provided with:

[0046] The inlet hole of the high pressure chamber intake electromagnetic valve, one end of which communicates with the inlet passage, and the other end of which is connected with the I port of the high pressure chamber intake electromagnetic valve;

[0047] The outlet hole of the high pressure chamber intake electromagnetic valve, one end of which is connected with the II port of the high pressure chamber intake electromagnetic valve, and the other end of which communicates with the high pressure chamber;

[0048] The inlet hole of the high pressure chamber outlet first electromagnetic valve, one end of which communicates with the high pressure chamber, and the other end of which is connected with the I port of the high pressure chamber outlet first electromagnetic valve;

[0049] The outlet hole of the high pressure chamber outlet first electromagnetic valve, one end of which is connected with the II port of the high pressure chamber outlet first electromagnetic valve, and the other end of which communicates with the left pump chamber passage;

[0050] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0051] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0052] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0053] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0054] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0055] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0056] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0057] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0058] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0059] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0060] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0061] the gas cylinder further comprises the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve, and the high-pressure chamber intake electromagnetic valve, the high-pressure chamber first outlet electromagnetic valve and the high-pressure chamber second outlet electromagnetic valve are connected with the circuit board respectively.

[0062] As preferred, the air pressure of the large positive pressure air cavity, the small positive pressure air cavity and the high pressure cavity is controlled at 0mbar~+500mbar, the air pressure of the large negative pressure air cavity and the small negative pressure air cavity is controlled at-500mbar~0mbar. The air pressure of the air bag is controlled at 0mbar~+1000mbar. The air pressure of the left pump chamber channel and the right pump chamber channel is controlled at-500mbar~+500mbar.

[0063] Compared with the prior art, the present application has the following beneficial effects:

[0064] 1. In the cartridge of the present application, the valve cavity and the flow channel are arranged at different sides of the base body, and a valve seat is arranged in the valve cavity. Only two valve cavities are needed for the left pump and the right pump respectively, and one valve cavity and valve seat are arranged for each connector hole, i.e. for each liquid input or output port, and three flow channels are arranged to realize the liquid guidance in the whole process of dialysate perfusion, liquid supplement and waste discharge, which will be described in detail below. In the case of arranging the same number of connector holes, i.e. in the case of realizing the same function, the cartridge of the present application makes more sufficient use of the space occupied by the base body, and the volume of the cartridge is smaller, and the number of valves arranged is smaller than that in the prior art, and the structure is simpler.

[0065] 2. The gas cylinder of the peritoneal dialysis machine of the present application arranges the large positive pressure air cavity, the large negative pressure air cavity, the small positive pressure air cavity and the small negative pressure air cavity on the gas cylinder, and processes each channel and the gas inlet and outlet hole for connecting and installing each electromagnetic valve on the gas cylinder. The electromagnetic valve is directly installed on the gas cylinder, and no additional bus bar is needed, which can realize the function of the existing gas cylinder and bus bar, so that the structure is more simple and compact, the occupied volume is smaller, and no gas pipe needs to be arranged between the gas cylinder and the bus bar, so that the probability of gas leakage is also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0066] Figure 1 It is an exploded structural schematic view of the liquid cartridge for the peritoneal dialysis machine according to an embodiment of the present application.

[0067] Figure 2 It is a structural schematic view of the first side of the liquid cartridge for the peritoneal dialysis machine according to an embodiment of the present application.

[0068] Figure 3 It is a structural schematic view of the connection of the liquid cartridge for the peritoneal dialysis machine according to an embodiment of the present application.

[0069] Figure 4 It is a structural schematic view of the second side of the base body of the liquid cartridge for the peritoneal dialysis machine according to an embodiment of the present application.

[0070] Figure 5Structure diagram of gas cylinder of peritoneal dialysis machine according to an embodiment of the present application.

[0071] Figure 6 Structure diagram of gas cylinder and each electromagnetic valve installed on the gas cylinder of peritoneal dialysis machine according to an embodiment of the present application.

[0072] Figure 7 Structure diagram of each electromagnetic valve of gas cylinder of peritoneal dialysis machine according to an embodiment of the present application

[0073] Figure 8 Structure diagram of bottle body of gas cylinder of peritoneal dialysis machine according to an embodiment of the present application, the bottle body in the diagram is inverted. Figure 5

[0074] Figure 9 Structure diagram of gas cylinder of peritoneal dialysis machine according to an embodiment of the present application from the top direction.

[0075] Figure 10 Structure diagram of gas cylinder of peritoneal dialysis machine according to an embodiment of the present application along L-L line in Figure 9 .

[0076] Figure 11 Structure diagram of gas cylinder of peritoneal dialysis machine according to an embodiment of the present application along H-H line in Figure 9 .

[0077] Figure 12 Structure diagram of gas cylinder of peritoneal dialysis machine according to an embodiment of the present application along I-I line in Figure 9 .

[0078] Figure 13 Structure diagram of gas cylinder of peritoneal dialysis machine according to an embodiment of the present application along J-J line in Figure 9 .

[0079] Figure 14 Structure diagram of gas cylinder of peritoneal dialysis machine according to an embodiment of the present application along K-K line in Figure 9 .

[0080] Figure 15 Structure diagram of gas cylinder of peritoneal dialysis machine according to an embodiment of the present application.

[0081] Reference signs

[0082] A bottle body, A1 first pump joint hole, A2 first pump joint, A3 second pump joint hole, A4 second pump joint, A5 reinforcing rib, A6 spool joint, A7 air filter column, A8 installation protrusion, A9 pressure measurement through hole, A10 atmosphere through hole, A11 load hole, A12 protrusion column;

[0083] B cover body;​

[0084] C gasket;

[0085] D circuit board;

[0086] 11 large positive pressure air chamber, 12 large negative pressure air chamber, 13 small positive pressure air chamber, 14 small negative pressure air chamber,

[0087] 15 air inlet passage, 16 air return passage, 17 large positive air pressure passage, 18 large negative air pressure passage, 19 left pump chamber passage, 1a right pump chamber passage;

[0088] 21 large negative pressure air chamber air return solenoid valve,

[0089] 22 air inlet passage air inlet solenoid valve,

[0090] 23 air inlet passage air outlet solenoid valve,

[0091] 24 large positive pressure air chamber air inlet solenoid valve,

[0092] 25, 26 air bag solenoid valve,

[0093] 27 high pressure chamber air inlet solenoid valve,

[0094] 28 small negative pressure air chamber air return solenoid valve,

[0095] 29 small positive pressure air chamber air inlet solenoid valve,

[0096] 210 high pressure chamber air outlet first solenoid valve,

[0097] 211 small positive pressure air chamber air outlet first solenoid valve,

[0098] 212 left pump chamber atmospheric solenoid valve,

[0099] 213 small negative pressure air chamber air inlet first solenoid valve,

[0100] 214 small negative pressure air chamber air inlet second solenoid valve,

[0101] 215 right pump chamber atmospheric solenoid valve,

[0102] 216 small positive pressure air chamber air outlet second solenoid valve,

[0103] 217 high pressure chamber air outlet second solenoid valve,

[0104] 218-227 liquid path control solenoid valve,

[0105] K21 air outlet hole of large negative pressure air chamber air return solenoid valve,

[0106] K22 air outlet hole of air inlet passage air inlet solenoid valve,

[0107] K23 air inlet hole of air inlet passage air outlet solenoid valve,

[0108] K24 inlet hole of the positive pressure air chamber inlet electromagnetic valve,

[0109] K25, K26 inlet hole of the air bag electromagnetic valve,

[0110] K27 inlet hole of the high pressure chamber inlet electromagnetic valve,

[0111] K28 outlet hole of the negative pressure air chamber return electromagnetic valve,

[0112] K29I inlet hole of the small positive pressure air chamber inlet electromagnetic valve,

[0113] K29II outlet hole of the small positive pressure air chamber inlet electromagnetic valve,

[0114] K211I inlet hole of the small positive pressure air chamber outlet first electromagnetic valve,

[0115] K211II outlet hole of the small positive pressure air chamber outlet first electromagnetic valve,

[0116] K216I inlet hole of the small positive pressure air chamber outlet second electromagnetic valve,

[0117] K216II outlet hole of the small positive pressure air chamber outlet second electromagnetic valve,

[0118] K218I-K227I inlet hole of the liquid path control electromagnetic valve,

[0119] K218III-K227III outlet hole of the liquid path control electromagnetic valve;

[0120] 3 cartridge

[0121] 31 base, 311 liquid tank, 312 pump tank, 313 valve seat, 32 soft diaphragm, 33 liquid tube, 34 joint, 35 tube clamp, 36 notch, 37 first side wall surface, 38 second side wall surface, 39 first vertical wall surface, 30 second vertical wall surface;

[0122] 3a perfusion valve cavity, 3b first liquid supplement valve cavity, 3c second liquid supplement valve cavity, 3d third liquid supplement valve cavity, 3e human body communication valve cavity, 3f waste liquid valve cavity, 3g left pump first valve cavity, 3h left pump second valve cavity, 3i right pump first valve cavity, 3j right pump second valve cavity, 3k left pump chamber, 3l right pump chamber, 3m first flow channel, 3n second flow channel, 30 left pump flow channel, 3p right pump flow channel, 3q first liquid inlet channel, 3r second liquid inlet channel, 3s through hole; DETAILED DESCRIPTION

[0123] The present application provides a liquid cartridge 3 for a peritoneal dialysis machine, which is disposable, such as Figures 1-3As shown, the cartridge 3 comprises a base 31 and a soft diaphragm 32 covering the wall surface 37 on the first side and the wall surface 38 on the second side of the base 31, the first side and the second side being opposite, in this embodiment, the wall surface on the first side and the wall surface on the second side are parallel and opposite. In this embodiment, the cartridge 3 comprises two pieces of the soft diaphragm 32, each piece of the soft diaphragm 32 is bonded to the edge of the side surface on the two sides of the base 31 correspondingly. In other embodiments, it can also be a larger piece of the soft diaphragm 32 bonded to the edge of the side surface on the two sides of the base 31.

[0124] As shown, Figure 2 the first side of the base 31 is provided with a plurality of mutually independent liquid grooves 311 recessed relative to the wall surface thereof and two mutually independent pump grooves 312. As shown, Figure 3 the second side of the base 31 is provided with a plurality of flow-through grooves recessed relative to the wall surface thereof, the flow-through grooves are used to form a plurality of flow-through channels, which will be described in detail in the next paragraph. Each of the liquid grooves 311 is provided with a cylindrical valve seat 313 having a through hole with one end communicating with the liquid groove 311 and the other end communicating with one of the flow-through grooves, the axis of the through hole is coincident with the axis of the cylindrical valve seat 313, taking the bottom wall of the liquid groove 311 as a reference, the distance between the end of the valve seat 313 away from the reference and the reference is less than the distance between the wall surface on the first side of the base 31 and the reference, that is, in the depth direction of the liquid groove 311, the end of the valve seat 313 away from the reference is lower than the wall surface on the first side, in this embodiment, the other end of the valve seat 313 is flush with the bottom wall of the liquid groove 311, preferably, the valve seat 313 is integrally injection molded with the base 31.

[0125] As shown, Figure 2 when the soft diaphragm is compressed against the wall surfaces on the first side and the second side of the base 31, a plurality of the liquid grooves 311 can be sealed to form a plurality of mutually independent perfusion valve cavities 3a, a liquid supplement valve cavity, a human body communication valve cavity 3e, a waste liquid valve cavity 3f, a left pump first valve cavity 3g, a left pump second valve cavity 3h, a right pump first valve cavity 3i, a right pump second valve cavity 3j, and two pump grooves 312 can be sealed to form a left pump chamber 3k and a right pump chamber 3l which are mutually independent, and a plurality of flow-through grooves can be sealed to form a left pump flow-through channel 3o, a right pump flow-through channel 3p, a first flow-through channel 3m and a second flow-through channel 3n which are mutually independent, the base 31 is also provided with a plurality of connector holes, the plurality of connector holes correspond to the perfusion valve cavities 3a, the liquid supplement valve cavity, the human body communication valve cavity 3e and the waste liquid valve cavity 3f one by one.

[0126] The valve seat 313 in the perfusion valve cavity 3a and the valve seat 313 in the waste liquid valve cavity 3f are both communicated with the first flow channel 3m, the valve seat 313 in the liquid supplement valve cavity and the valve seat 313 in the human body communication valve cavity 3e are both communicated with the second flow channel 3n, the valve seat 313 in the left pump first valve cavity 3g and the valve seat 313 in the left pump second valve cavity 3h are both communicated with the left pump flow channel 3o, the valve seat 313 in the right pump first valve cavity 3i and the valve seat 313 in the right pump second valve cavity 3j are both communicated with the right pump flow channel 3p, the left pump first valve cavity 3g and the right pump first valve cavity 3i are both communicated with the first flow channel 3m, the left pump second valve cavity 3h and the right pump second valve cavity 3j are both communicated with the second flow channel 3n, the left pump chamber 3k is communicated with the left pump flow channel 3o, and the right pump chamber 3l is communicated with the right pump flow channel 3p.

[0127] The soft diaphragm 32 of the cartridge 3 of the present application can be deformed under the action of a pneumatic device. When the soft diaphragm 32 is driven to tightly adhere to the two sides of the base 31 respectively, the first side of the cartridge 3 forms a plurality of independent valve cavities and pump cavities, and the second side forms a plurality of independent flow channels. When the part of the soft diaphragm 32 opposite to the valve seat 313 tightly adheres to one end of the valve seat 313, in this embodiment, the end of the soft diaphragm 32 communicated with the valve cavity tightly adheres to form a blockage, so that the liquid flow between the valve cavity located at the first side of the base 31 and the flow channel located at the second side of the base 31 is cut off. When the soft diaphragm 32 is driven to leave one end of the valve seat 313, the liquid can flow from the valve cavity to the corresponding flow channel. In the cartridge 3 of the present application, the valve cavities and the flow channels are arranged at different sides of the base 31, and the valve seat 313 is arranged in the valve cavity. Only two valve cavities corresponding to the left pump and the right pump are arranged, and one valve cavity and valve seat 313 are arranged corresponding to each connector hole, i.e. corresponding to each liquid input or output port, and three flow channels are arranged, so that the liquid guidance in the whole process of perfusion, liquid supplement and waste discharge of dialysate can be realized. The process will be described in detail below. In the case of arranging the same number of connector holes, i.e. in the case of realizing the same function, the cartridge 3 of the present application more fully utilizes the space occupied by the base 31, the volume of the cartridge 3 is smaller, and the number of valves arranged is less than that in the prior art, and the structure is simpler. For example, in this embodiment, the cartridge is provided with six interfaces, and ten valve seats are arranged correspondingly, so that the liquid path conversion in all processes of peritoneal dialysis can be completed, while the existing structure needs 13-14 valves to complete.

[0128] Four of the perfusion valve cavity 3a, the human body communication valve cavity 3e, the waste liquid valve cavity 3f and the three liquid supplement valve cavities are arranged at the leftmost end of the cassette 3 along the width direction of the leftmost end of the cassette 3, and the four cavities are communicated with the four pipe connection holes on the first side of the base 31 one by one. The other two cavities are arranged at the right side of the four cavities along the width direction of the cassette 3. The second side of the base 31 is provided with a first liquid inlet channel 3q and a second liquid inlet channel 3n, and the two liquid inlet channels are communicated with the other two cavities one by one and communicated with the two pipe connection holes on the second side of the base 31 one by one. The pipe connection holes are all arranged at the leftmost end of the base 31.

[0129] In the embodiment, the cassette 3 includes three liquid supplement valve cavities, as shown in Figure 2 The left end of the cassette 3 is sequentially arranged with the waste liquid valve cavity 3f, the first liquid supplement valve cavity 3b, the third liquid supplement valve cavity 3d and the human body communication valve cavity 3e along the width direction of the cassette 3. The left pump chamber 3k and the right pump chamber 3l are elliptical, and the depth of the middle part of the left pump chamber 3k and the right pump chamber 3l is greater than the depth of the edge. The left pump first valve cavity 3g, the perfusion valve cavity 3a, the second liquid supplement valve cavity 3c and the left pump second valve cavity 3h are arranged around the left side of the left pump. The left pump first valve cavity 3g and the left pump second valve cavity 3h are located at the left side of the left pump chamber 3k. The left pump flow channel 3o is parallel and opposite to the edge of the left pump chamber 3k close to the left pump first valve cavity 3g and the left pump second valve cavity 3h. The right pump first valve cavity 3i and the right pump second valve cavity 3j are located between the left pump chamber 3k and the right pump chamber 3l. The right pump flow channel 3p is parallel and opposite to the edge of the right pump chamber 3l close to the right pump first valve cavity 3i and the right pump second valve cavity 3j. The perfusion valve cavity 3a and the second liquid supplement valve cavity 3c are arranged between the left pump first valve cavity 3g and the left pump second valve cavity 3h.

[0130] As preferred, as shown in Figure 2 The base 31 is provided with a communication hole 3s which communicates the first side and the second side of the base 31 at the positions where the two liquid inlet channels are opposite to the other two cavities respectively, the positions where the left pump first valve cavity 3g is opposite to the first flow channel 3m, the positions where the right pump first valve cavity 3i is opposite to the first flow channel 3m, the positions where the left pump second valve cavity 3h is opposite to the second flow channel 3n, the positions where the right pump second valve cavity 3j is opposite to the second flow channel 3n, the positions where the left pump chamber 3k is opposite to the left pump flow channel 3o, and the positions where the right pump chamber 3l is opposite to the right pump flow channel 3p, so as to realize the communication between the corresponding valve cavities or pump chambers and the channels.

[0131] As shown in Figure 2 and Figure 3As shown, the base 31 has a first vertical wall 39 perpendicular to the wall of the first side and a second vertical wall 30 opposite to the first vertical wall, both of which are connected to the left and right ends of the cartridge 3, and the right part of the first vertical wall 39 is closer to the second vertical wall 30 than the left part, so that a notch 36 is formed at the upper right side of the cartridge 3, which forms a mark to prevent the cartridge 3 from being placed reversely into the peritoneal dialysis machine. In this embodiment, the right end of the cartridge 3 is arc-shaped, which also distinguishes the left and right ends of the cartridge 3.

[0132] In this embodiment, as shown in the figure, Figure 4 Each connector 34 is provided at each connector hole, and each connector 34 is connected to a liquid tube 33 provided with a tube clamp 35. Through the connector 34 and the liquid tube 33, the priming valve cavity 3a is connected to a heated liquid bag (not shown in the figure), the human body communication valve cavity 3e is used for connection with a patient, the waste liquid valve cavity 3f is connected to a waste liquid bag (not shown in the figure), and a plurality of replacement liquid bags (not shown in the figure) are connected to three replacement liquid valve cavities.

[0133] Priming process:

[0134] When the valve seats 313 in the priming valve cavity 3a, the right pump first valve cavity 3i, the left pump second valve cavity 3h and the human body communication valve cavity 3e are opened at the same time, the fourth pneumatic member absorbs the soft diaphragm 32 opposite to the right pump chamber 3l, so that the volume of the right pump chamber 3l increases, and the third pneumatic member presses the soft diaphragm 32 opposite to the left pump chamber 3k, so that the volume of the left pump chamber 3k decreases. The heated dialysate in the heated liquid bag flows into the priming valve cavity 3a through the first liquid inlet channel 3q, and then flows through the first flow channel 3m, the right pump first valve cavity 3i, the right pump flow channel 3p in turn, and enters the right pump chamber 3l. At the same time, the dialysate in the left pump chamber 3k flows through the left pump flow channel 3o, the left pump second valve cavity 3h, the second flow channel 3n and the human body communication valve cavity 3e in turn, and finally enters the patient's body.

[0135] When the valve seats 313 in the priming valve cavity 3a, the right pump second valve cavity 3j, the left pump first valve cavity 3g and the human body communication valve cavity 3e are opened at the same time, the volume of the left pump chamber 3k increases, and the volume of the right pump chamber 3l decreases. The heated dialysate in the heated liquid bag flows into the priming valve cavity 3a through the first liquid inlet channel 3q, and then flows through the first flow channel 3m, the left pump first valve cavity 3g, the left pump flow channel 3o and the left pump chamber 3k in turn. At the same time, the dialysate in the right pump chamber 3l flows through the right pump flow channel 3p, the right pump second valve cavity 3j, the second flow channel 3n and the human body communication valve cavity 3e in turn, and finally enters the patient's body.

[0136] When the dialysate in the heated liquid bag is exhausted, the replacement liquid process is entered, and when the first replacement liquid bag is replenished:

[0137] When the valve seats 313 in the first liquid supplement valve cavity 3b, the perfusion valve cavity 3a, the right pump second valve cavity 3j and the left pump first valve cavity 3g are opened at the same time, the volume of the right pump chamber 3l increases, and the dialysate in the first liquid supplement bag flows into the right pump chamber 3l through the first liquid supplement valve cavity 3b, the second flow channel 3n, the right pump second valve cavity 3j and the right pump flow channel 3p in turn. At the same time, the volume of the left pump chamber 3k decreases, and the dialysate in the left pump chamber 3k flows into the heating liquid bag through the left pump flow channel 3o, the left pump first valve cavity 3g, the first flow channel 3m and the perfusion valve cavity 3a in turn.

[0138] When the valve seats 313 in the first liquid supplement valve cavity 3b, the perfusion valve cavity 3a, the right pump first valve cavity 3i and the left pump second valve cavity 3h are opened at the same time, the volume of the left pump chamber 3k increases, and the dialysate in the first liquid supplement valve cavity 3b flows into the left pump chamber 3k through the first liquid supplement valve cavity 3b, the second flow channel 3n, the left pump second valve cavity 3h and the left pump flow channel 3o. At the same time, the volume of the right pump chamber 3l decreases, and the dialysate in the right pump chamber 3l flows into the heating liquid bag through the right pump flow channel 3p, the right pump first valve cavity 3i, the first flow channel 3m and the perfusion valve cavity 3a in turn.

[0139] After the first liquid supplement bag is supplemented with liquid, the perfusion process continues, and when the dialysate in the heating liquid bag flows out, the second liquid supplement bag is supplemented with liquid, specifically as follows:

[0140] When the valve seats 313 in the second liquid supplement valve cavity 3c, the perfusion valve cavity 3a, the right pump second valve cavity 3j and the left pump first valve cavity 3g are opened at the same time, the volume of the right pump chamber 3l increases, and the dialysate in the second liquid supplement bag flows into the right pump chamber 3l through the second liquid supplement valve cavity 3c, the second flow channel 3n, the right pump second valve cavity 3j and the right pump flow channel 3p in turn. At the same time, the volume of the left pump chamber 3k decreases, and the dialysate in the left pump chamber 3k flows into the heating liquid bag through the left pump flow channel 3o, the left pump first valve cavity 3g, the first flow channel 3m and the perfusion valve cavity 3a in turn.

[0141] When the valve seats 313 in the second liquid supplement valve cavity 3c, the perfusion valve cavity 3a, the right pump first valve cavity 3i and the left pump second valve cavity 3h are opened at the same time, the volume of the left pump chamber 3k increases, and the dialysate in the second liquid supplement valve cavity 3c flows into the left pump chamber 3k through the second liquid supplement valve cavity 3c, the second flow channel 3n, the left pump second valve cavity 3h and the left pump flow channel 3o. At the same time, the volume of the right pump chamber 3l decreases, and the dialysate in the right pump chamber 3l flows into the heating liquid bag through the right pump flow channel 3p, the right pump first valve cavity 3i, the first flow channel 3m and the perfusion valve cavity 3a in turn.

[0142] After the second liquid supplement bag is supplemented with liquid, the perfusion process continues, and when the dialysate in the heating liquid bag flows out, the third liquid supplement bag is supplemented with liquid, specifically as follows:

[0143] When the valve seats 313 in the third replacement fluid valve cavity 3d, the perfusion valve cavity 3a, the right pump second valve cavity 3j and the left pump first valve cavity 3g are opened at the same time, the volume of the right pump chamber 3l increases, and the dialysis fluid in the third replacement fluid bag flows into the right pump chamber 3l through the third replacement fluid valve cavity 3d, the second flow channel 3n, the right pump second valve cavity 3j and the right pump flow channel 3p in turn. At the same time, the volume of the left pump chamber 3k decreases, and the dialysis fluid in the left pump chamber 3k flows into the heating fluid bag through the left pump flow channel 3o, the left pump first valve cavity 3g, the first flow channel 3m and the perfusion valve cavity 3a in turn.

[0144] When the valve seats 313 in the third replacement fluid valve cavity 3d, the perfusion valve cavity 3a, the right pump first valve cavity 3i and the left pump second valve cavity 3h are opened at the same time, the volume of the left pump chamber 3k increases, and the dialysis fluid in the third replacement fluid valve cavity 3d flows into the left pump chamber 3k through the third replacement fluid valve cavity 3d, the second flow channel 3n, the left pump second valve cavity 3h and the left pump flow channel 3o. At the same time, the volume of the right pump chamber 3l decreases, and the dialysis fluid in the right pump chamber 3l flows into the heating fluid bag through the right pump flow channel 3p, the right pump first valve cavity 3i, the first flow channel 3m and the perfusion valve cavity 3a in turn.

[0145] After the dialysis fluid stays in the patient's body for a set time, the dialysis fluid enters the waste discharge process:

[0146] When the valve seats 313 in the human body communication valve cavity 3e, the waste fluid valve cavity 3f, the right pump second valve cavity 3j and the left pump first valve cavity 3g are opened at the same time, the volume of the right pump increases, and the waste fluid flows into the right pump chamber 3l through the human body communication valve cavity 3e, the second flow channel 3n, the right pump second valve cavity 3j and the right pump flow channel 3p in turn. At the same time, the volume of the left pump decreases, and the liquid in the left pump chamber 3k flows out through the left pump flow channel 3o, the left pump first valve cavity 3g, the first flow channel 3m and the waste fluid valve cavity 3f in turn.

[0147] When the valve seats 313 in the human body communication valve cavity 3e, the waste fluid valve cavity 3f, the right pump first valve cavity 3i and the left pump second valve cavity 3h are opened at the same time, the volume of the left pump increases, and the waste fluid flows into the left pump chamber 3k through the human body communication valve cavity 3e, the second flow channel 3n, the left pump first valve cavity 3g and the left pump flow channel 3o in turn. At the same time, the volume of the right pump decreases, and the liquid in the right pump chamber 3l flows out through the right pump flow channel 3p, the right pump first valve cavity 3i, the second flow channel 3n and the waste fluid valve cavity 3f in turn.

[0148] The present invention also provides a peritoneal dialysis machine, including a pressure control device and a cartridge 3 as described above. The pressure control device includes a gas cylinder and a pneumatic device (not shown in the figure) connected to the gas cylinder via a gas tube. Under the pressure of the gas output from the gas cylinder, the pneumatic device drives the soft diaphragm 32 of the cartridge 3 to press against or move away from the base 31. The pneumatic device includes a first pneumatic component, which has a frame structure that mates with the first and second side walls of the base 31. The first pneumatic component causes the soft diaphragm 32 to press against or move away from the first and second side walls of the base 31 relative to the frame, forming various valve chambers, pump chambers, and flow channels. The pneumatic device further includes a plurality of second pneumatic components that are one-to-one opposite to the plurality of valve seats 313. The second pneumatic components drive the soft diaphragm 32 to a position opposite to a certain valve seat 313 so that it is pressed against or away from the valve seat 313, thereby realizing the opening and closing of the liquid circuit. The pneumatic device also includes a third pneumatic component opposite to the left pump chamber 3k and a fourth pneumatic component opposite to the right pump chamber 3l. The third pneumatic component and the fourth pneumatic component alternately squeeze the soft diaphragm 32 at the position opposite to the left pump chamber 3k and the right pump chamber 3l to discharge liquid, or alternately adsorb the soft diaphragm 32 at the position opposite to the left pump chamber 3k and the right pump chamber 3l to absorb liquid.

[0149] The gas cylinder of the peritoneal dialysis machine of the present invention includes a cylinder body A and a cap body B. For example... Figure 8 As shown, bottle A has four independent chambers: a large positive pressure chamber 11, a large negative pressure chamber 12, a small positive pressure chamber 13, and a small negative pressure chamber 14. The cap B seals each of these chambers. In this embodiment, as... Figure 6 As shown, a sealing gasket C is provided between the cap B and the cylinder A to form a seal between the various gas chambers. In this embodiment, a silicone sealing gasket is used, which has good sealing performance, is not prone to aging, and gives the gas cylinder a longer service life. The outer wall of the cylinder A is provided with a mounting protrusion A8, which has a mounting through hole. A bolt can be passed through the mounting through hole and fixed to a fixing frame or other support. When the cap B is fixed to the cylinder A, the cap B forms the bottom wall of the gas cylinder, and the openings of the large positive pressure gas chamber 11, the large negative pressure gas chamber 12, the small positive pressure gas chamber 13, and the small negative pressure gas chamber 14 face the cap B. Figure 5 As shown, the top wall of the gas cylinder has multiple inlet and outlet ports for solenoid valves, used to install multiple solenoid valves. The connection relationship and function of each solenoid valve and its port will be described in detail below. All solenoid valves used in this embodiment are as follows... Figure 7 As shown, this is a two-position three-way valve with port I, port II, and port III, and all valves are normally closed.

[0150] The bottle body A has the following opening:

[0151] The air inlet channel 15, as shown in Figure 12 is used for communication with the positive pressure end of the air pump for receiving the positive pressure air flow generated by the air pump.

[0152] The air inlet hole K24 of the large positive pressure air chamber air inlet electromagnetic valve, as shown in Figure 12 one end is connected with the air inlet channel 15 and the other end is used for connection with the I port of the large positive pressure air chamber air inlet electromagnetic valve 24;

[0153] The air outlet hole (not shown in the figure) of the large positive pressure air chamber air inlet electromagnetic valve, one end is used for connection with the II port of the large positive pressure air chamber air inlet electromagnetic valve 24 and the other end is connected with the large positive pressure air chamber 11;

[0154] Through the air inlet channel 15, the air inlet hole K24 of the large positive pressure air chamber air inlet electromagnetic valve, the air outlet hole of the large positive pressure air chamber air inlet electromagnetic valve and the large positive pressure air chamber air inlet electromagnetic valve 24, the air flow from the air inlet channel 15 into the large positive pressure air chamber 11 can be controlled, thereby the pressure in the large positive pressure air chamber 11 can be controlled. The bottle body A is provided with a plurality of pressure measuring through holes A9, each pressure measuring through hole A9 is provided with a tower joint A6, each tower joint A6 is connected with an air pipe (not shown in the figure), the air pipe is connected with an air pressure sensor (not shown in the figure), the II port of the air inlet hole K24 of the large positive pressure air chamber air inlet electromagnetic valve is communicated with one of the pressure measuring through holes A9, thereby the air pressure of the large positive pressure air chamber 11 can be detected. The air pressure of the large positive pressure air chamber is controlled at 0 mbar to +500 mbar, in the embodiment, the pressure in the large positive pressure air chamber 11 is controlled at about 400 mbar, when the air pressure value of the large positive pressure air chamber 11 is lower than the set lower limit value, the II port of the electromagnetic valve 24 is communicated with the I port, the air inlet channel 15 supplies air to the large positive pressure air chamber 11 to the set air pressure value.

[0155] The bottle body A is further provided with:

[0156] The large positive pressure channel 17 is communicated with the large positive pressure air chamber 11;

[0157] The air inlet holes K218I-K227I of the plurality of liquid path control electromagnetic valves, as shown in Figure 10 one end of the air inlet holes K218I-K227I of the plurality of liquid path control electromagnetic valves is respectively communicated with the large positive pressure channel 17 and the other end is used for one-to-one corresponding connection with the I ports of the plurality of liquid path control electromagnetic valves 218-227;

[0158] The large negative pressure channel 18;

[0159] The air outlet holes K218III-K227III of the plurality of liquid path control electromagnetic valves, as shown in Figure 11As shown, one end of the gas outlet hole K218III-K227III of the plurality of liquid path control electromagnetic valves is communicated with the large negative pressure passage 18, and the other end is used for connecting with the III port of the plurality of liquid path control electromagnetic valves 218-227 respectively. Figure 14 As shown, the gas inlet hole K218I of the liquid path control electromagnetic valve 218, the gas outlet hole K218III of the liquid path control electromagnetic valve, the control hole K218II of the liquid path control electromagnetic valve, and the load hole Al 1 for communicating the control hole K218II with the outside of the gas cylinder are shown.

[0160] The back gas passage 16 is used for communicating with the negative pressure end of the gas pump.

[0161] The gas inlet hole (not shown in the figure) of the large negative pressure gas cavity back gas electromagnetic valve is communicated with the large negative pressure gas cavity 12 at one end, and is connected with the II port of the large negative pressure gas cavity back gas electromagnetic valve 21 at the other end.

[0162] The gas outlet hole K21 of the large negative pressure gas cavity back gas electromagnetic valve is connected with the III port of the large negative pressure gas cavity back gas electromagnetic valve 21 at one end, and is communicated with the back gas passage 16 at the other end. Figure 13

[0163] Through the above structure, the gas in the large positive pressure gas cavity 11 can flow to the large positive pressure passage 17, and then enter the plurality of liquid path control electromagnetic valves 218-227. When the II port of a certain liquid path control electromagnetic valve 218-227 is communicated with the I port, the gas entering the corresponding second pneumatic element through the II port of the liquid path control electromagnetic valve 218-227 generates positive pressure, so that the position of the soft diaphragm corresponding to the second pneumatic element is tightly attached to the corresponding valve seat, thereby blocking the liquid path and disconnecting it. When the II port of a certain liquid path control electromagnetic valve 218-227 is communicated with the III port, the negative pressure generated by the gas flowing back to the III port through the II port of the liquid path control electromagnetic valve 218-227 drives the second pneumatic element to drive the position of the soft diaphragm corresponding to the valve seat, thereby connecting the liquid path. The pressure of the large negative pressure gas cavity 12 is controlled at 0 mbar to -500 mbar. In this embodiment, it is controlled at about -400 mbar, the II port of the gas outlet hole K21 of the large negative pressure gas cavity back gas electromagnetic valve is communicated with one of the pressure measuring through holes A9, so that the gas pressure of the large negative pressure gas cavity 12 can be detected. When the absolute value of the gas pressure of the large negative pressure gas cavity 12 is lower than the set lower limit value, the II port of the electromagnetic valve 21 is communicated with the III port, and the large negative pressure gas cavity is supplemented to restore to the set value, Figure 15 As shown, the gas path principle diagram of the gas cylinder is shown. Figure 15 As can be seen, the electromagnetic valves guide the flow direction of the gas.

[0164] In this embodiment, as shown in Figure 5 and Figure 6 ​As shown, the wall of the bottle body A is provided with a first pump joint hole A1 communicating the air inlet channel 15 with the positive pressure end of the air pump and a first pump joint A3 installed on the first pump joint hole A1, and the wall of the bottle body A is also provided with a second pump joint hole A3 communicating the air return channel 16 with the negative pressure end of the air pump and a second pump joint A4 installed on the second pump joint hole A3.

[0165] The gas cylinder is also provided with:

[0166] The air inlet hole K29I of the small positive pressure air cavity air inlet electromagnetic valve, as shown in the figure, is connected with the air inlet channel 15 at one end and is used to be connected with the I port of the small positive pressure air cavity air inlet electromagnetic valve 29 at the other end; Figure 14

[0167] The air outlet hole K29II of the small positive pressure air cavity air inlet electromagnetic valve, as shown in the figure, is used to be connected with the II port of the small positive pressure air cavity air inlet electromagnetic valve 29 at one end and is connected with the small positive pressure air cavity 13 at the other end;

[0168] The small positive pressure air cavity air inlet electromagnetic valve 29 can be set through the air inlet hole K29I and the air outlet hole of the small positive pressure air cavity air inlet electromagnetic valve, the air pressure of the small positive pressure air cavity 13 can be controlled through the small positive pressure air cavity air inlet electromagnetic valve 29, the air pressure of the small positive pressure air cavity 13 is controlled at 0-500 mbar, in this embodiment, it is controlled at about 300 mbar, the II port of the small positive pressure air cavity air inlet electromagnetic valve 29 is communicated with one of the pressure measuring through holes A9, so that the air pressure of the small negative pressure air cavity 13 can be detected, when the air pressure value of the small positive pressure air cavity 14 exceeds the set value, the electromagnetic valve 29 is started, that is, the I port and the II port of the electromagnetic valve 29 are communicated, the air inlet channel 15 is used to pressurize the small positive pressure air cavity 13 to the air pressure set value.

[0169] The bottle body A is also provided with:

[0170] The left pump chamber channel 19, as shown in the figure, is used to be communicated with the membrane deformation driver (not shown in the figure) of the left pump chamber of the driving liquid pump (not shown in the figure), so that the driving liquid enters or is discharged from the left pump chamber; Figure 14

[0171] The right pump chamber channel 1a, as shown in the figure, is used to be communicated with the membrane deformation driver (not shown in the figure) of the right pump chamber of the driving liquid pump, so that the driving liquid enters or is discharged from the right pump chamber; Figure 14 The air inlet hole K211I of the small positive pressure air cavity air outlet first electromagnetic valve, as shown in the figure, is connected with the small positive pressure air cavity 13 at one end and is used to be connected with the I port of the small positive pressure air cavity air outlet first electromagnetic valve at the other end;

[0172] Figure 14

[0173] ​​​​The outlet port K211Ⅱ of the first solenoid valve for the small positive pressure air chamber has one end connected to port Ⅱ of the first solenoid valve for the small positive pressure air chamber, and the other end connected to the left pump chamber channel 19, as shown below. Figure 14 As shown;

[0174] The air inlet port K216I of the second solenoid valve for the small positive pressure air chamber outlet, as shown... Figure 14 As shown, one end is connected to the small positive pressure air chamber 13, and the other end is used to connect to the I port of the second solenoid valve 216 of the small positive pressure air chamber outlet.

[0175] The outlet port K216Ⅱ of the second solenoid valve for the small positive pressure air chamber has one end connected to port Ⅱ of the second solenoid valve for the small positive pressure air chamber, and the other end connected to the right pump chamber channel 1a, as shown below. Figure 14 As shown;

[0176] The above structure allows for the installation of a first solenoid valve 211 and a second solenoid valve 216 for the small positive pressure gas chamber. When port I and port II of the first solenoid valve 211 are connected, gas enters the third pneumatic component, compressing the soft diaphragm relative to the left pump chamber, thus reducing the volume of the left pump chamber and squeezing out the liquid. When port I and port II of the second solenoid valve 216 are connected, gas enters the fourth pneumatic component, compressing the soft diaphragm relative to the right pump chamber, thus squeezing out the liquid from the right pump chamber. The first and second solenoid valves 211 and 216 can be controlled to alternately connect their ports I and II, thereby controlling the alternating squeezing out of the liquid from the left and right pump chambers.

[0177] The bottle body A also has the following openings:

[0178] The air inlet of the first solenoid valve for the small negative pressure air chamber (not shown in the figure) is used to connect one end to the actuator for membrane deformation of the left pump chamber that drives the liquid pump, and the other end is used to connect to port II of the first solenoid valve 213 for the small negative pressure air chamber.

[0179] The air outlet of the first solenoid valve for the small negative pressure air chamber (not shown in the figure) is used to connect one end to port III of the first solenoid valve 213 for the small negative pressure air chamber, and the other end is connected to the small negative pressure air chamber 14.

[0180] The air inlet of the second solenoid valve for the small negative pressure air chamber (not shown in the figure) is used to connect one end to the actuator of the membrane deformation of the right pump chamber that drives the liquid pump, and the other end is used to connect to port II of the second solenoid valve 214 for the small negative pressure air chamber.

[0181] The outlet of the second solenoid valve for the small negative pressure air chamber (not shown in the figure) is used to connect one end to port III of the second solenoid valve 214 for the small negative pressure air chamber, and the other end is connected to the small negative pressure air chamber 14.

[0182] The air inlet hole (not shown in the figure) of the small negative pressure air chamber back gas electromagnetic valve is communicated with the small negative pressure air chamber 14 at one end and is used for connecting with the II port of the small negative pressure air chamber back gas electromagnetic valve 28 at the other end;

[0183] The air outlet hole K28 of the small negative pressure air chamber back gas electromagnetic valve is used for connecting with the III port of the small negative pressure air chamber back gas electromagnetic valve 28 at one end and is communicated with the back gas channel 16 at the other end, as shown in the figure. Figure 13

[0184] Through the above structure, the small negative pressure air chamber inlet first electromagnetic valve 213, the small negative pressure air chamber inlet second electromagnetic valve 214 and the small negative pressure air chamber back gas electromagnetic valve 28 can be arranged, the gas of the left pump chamber can enter the small negative pressure air chamber 14 through the small negative pressure air chamber inlet first electromagnetic valve 213, at this time, the soft diaphragm opposite to the left pump chamber is adsorbed by the third pneumatic element, so that the volume of the left pump chamber cavity is increased, and the liquid is sucked. The gas of the right pump chamber can enter the small negative pressure air chamber 14 through the small negative pressure air chamber inlet second electromagnetic valve 214, at this time, the membrane of the right pump chamber is deformed under the negative pressure adsorption of the fourth pneumatic element, so that the volume of the right pump chamber cavity is increased, at this time, the right pump chamber sucks the liquid. The two electromagnetic valves 213 and 214 are controlled to be communicated with each other at the II port and the III port alternately, so that the gas of the left pump chamber and the right pump chamber enters the small negative pressure air chamber 14 alternately, thereby the liquid is discharged alternately. The air pressure of the small negative pressure air chamber 14 is controlled at-500mbar-0mbar, in the embodiment, it is controlled at about-300mbar, the II port of the small negative pressure air chamber back gas electromagnetic valve 28 is communicated with one of the pressure measuring through holes A9, so that the air pressure of the small negative pressure air chamber 14 can be detected, when the air pressure value of the small negative pressure air chamber 13 is lower than the set lower limit value, the electromagnetic valve 28 is started to make the III port and the II port communicated, so that the air pressure value of the small negative pressure air chamber 13 is restored to the air pressure set value.

[0185] The gas cylinder of the peritoneal dialysis machine is arranged with the large positive pressure air chamber 11, the large negative pressure air chamber 12, the small positive pressure air chamber 13 and the small negative pressure air chamber 14, so that the electromagnetic valves can be directly installed on the gas cylinder, without the bus bar, the functions of the existing gas cylinder and the bus bar can be realized, the structure is more simple and compact, the occupied volume is smaller, and the gas pipe between the gas cylinder and the bus bar is not needed, so that the probability of gas leakage is also reduced. The bottle body can be integrally formed, for example, pressure casting or casting, and then the channels and the air inlet ports and the air outlet holes for connecting and installing the electromagnetic valves are processed on the bottle body, the processing is simpler, the processing difficulty is reduced and the processing amount is reduced.

[0186] As Figure 8 ​As shown, the large negative pressure air cavity 12, the large positive pressure air cavity 11, the small positive pressure air cavity 13 and the small negative pressure air cavity 14 are arranged in parallel and sequentially. At least one reinforcing rib A5 is arranged in each of the large negative pressure air cavity 12, the large positive pressure air cavity 11, the small positive pressure air cavity 13 and the small negative pressure air cavity 14. The reinforcing rib A5 is perpendicular to the length direction of each air cavity. One end of the reinforcing rib A5 is connected with one side of the inner wall of each air cavity, and the other end is connected with the opposite side of the inner wall of each air cavity. The reinforcing rib A5 can strengthen the structure of the rectangular air cavity, prevent the wall of each air cavity from deforming, and make the structure of the gas cylinder more stable.

[0187] As shown in the drawings, Figure 6 The gas cylinder further comprises the large positive pressure air cavity inlet electromagnetic valve 24, the plurality of liquid path control electromagnetic valves 218-227, the large negative pressure air cavity return gas electromagnetic valve 21, the small positive pressure air cavity inlet electromagnetic valve 29, the small positive pressure air cavity outlet first electromagnetic valve 211, the small positive pressure air cavity outlet second electromagnetic valve 216, the small negative pressure air cavity inlet first electromagnetic valve 213, the small negative pressure air cavity inlet second electromagnetic valve 214 and the small negative pressure air cavity return gas electromagnetic valve 28. The gas cylinder further comprises the circuit board D arranged on the bottle body A. The circuit board D is provided with a controller (not shown in the figure) connected with all the electromagnetic valves and gas pumps in the application respectively to control the electromagnetic valves and the gas pumps. In the application, all the gas pressure sensors are connected with the controller. The working parameters of the gas pumps and the pressure values of each cavity are set for the controller. When the data transmitted by the gas pressure sensor is lower than the set value, the corresponding electromagnetic valve is controlled to supplement gas to the corresponding cavity to restore the gas pressure in the cavity to the set value.

[0188] The gas cylinder of the peritoneal dialysis machine integrates the large positive pressure air cavity 11, the large negative pressure air cavity 12, the small positive pressure air cavity 13, the small negative pressure air cavity 14, all the electromagnetic valves and the circuit board D into one module, realizes high integration, has a more compact structure, reduces the bus bar and reduces the cost increase caused by the separation of the gas cylinder and the electromagnetic valve in the prior art. In addition, the entire gas cylinder can be replaced for maintenance, which improves the maintenance speed and efficiency.

[0189] As shown in the drawings, Figure 5 And Figure 6 As shown in the drawings, the outer wall of the top wall of the bottle body is provided with a plurality of protruding columns A12. The protruding columns A12 and the circuit board D are both provided with mounting holes. The circuit board D is mounted on the gas cylinder by the mode that the screws pass through the mounting holes of the protruding columns A12 and the mounting holes of the circuit board D. In this way, the circuit board can be quickly positioned and mounted. In the embodiment, the number of the liquid path control electromagnetic valves 218-227 is 10. Of course, the number of the liquid path control electromagnetic valves 218-227 can also be set according to actual needs.

[0190] The gas cylinder is also provided with:

[0191] The inlet hole K27 of the high-pressure cavity inlet electromagnetic valve, as shown in the drawings,Figure 12 One end of the high-pressure chamber intake electromagnetic valve communicates with the intake passage 15, and the other end is used for communicating with the I port of the high-pressure chamber intake electromagnetic valve 27.

[0192] One end of the high-pressure chamber intake electromagnetic valve communicates with the intake passage 15, and the other end is used for communicating with the I port of the high-pressure chamber intake electromagnetic valve 27.

[0193] One end of the high-pressure chamber intake electromagnetic valve communicates with the intake passage 15, and the other end is used for communicating with the I port of the high-pressure chamber intake electromagnetic valve 27.

[0194] One end of the high-pressure chamber intake electromagnetic valve communicates with the intake passage 15, and the other end is used for communicating with the I port of the high-pressure chamber intake electromagnetic valve 27.

[0195] One end of the high-pressure chamber intake electromagnetic valve communicates with the intake passage 15, and the other end is used for communicating with the I port of the high-pressure chamber intake electromagnetic valve 27.

[0196] One end of the high-pressure chamber intake electromagnetic valve communicates with the intake passage 15, and the other end is used for communicating with the I port of the high-pressure chamber intake electromagnetic valve 27.

[0197] The gas cylinder further comprises the high-pressure cavity inlet electromagnetic valve 27, the high-pressure cavity outlet first electromagnetic valve 210 and the high-pressure cavity outlet second electromagnetic valve 217, which are connected with the circuit board D. In the embodiment, the gas cylinder further comprises a high-pressure cavity module (not shown in the figure), which comprises a high-pressure cavity with a pressure range of 0 mbar to +500 mbar. In the embodiment, the pressure of the high-pressure cavity is controlled at about 350 mbar. The II port of the high-pressure cavity inlet electromagnetic valve 27 is communicated with one of the pressure measuring through holes A9, so that the pressure of the high-pressure cavity can be detected. The high-pressure cavity of the high-pressure cavity module can be connected with the II port of the high-pressure cavity inlet electromagnetic valve 27 through a high-pressure cavity inlet pipe (not shown in the figure), and the high-pressure cavity is connected with the I port of the high-pressure cavity outlet first electromagnetic valve 210 and the I port of the high-pressure cavity outlet second electromagnetic valve through a high-pressure cavity outlet pipe (not shown in the figure). The left pump chamber passage 19 and the right pump chamber passage 1a are provided with pressure sensors (not shown in the figure) for detecting the pressure of the left pump chamber passage and the right pump chamber passage, recording the pressure and the pressure change value, and calculating the volume of the pumped liquid in the left pump chamber and the right pump chamber according to the gaseous equation.

[0198] The gas cylinder is further provided with two air bag electromagnetic valves 25, 26, and the air inlet hole K25, 26 of each air bag electromagnetic valve is communicated with the air inlet passage 15 at one end and communicated with the I port of the air bag electromagnetic valve 25, 26 at the other end. Figure 12 The gas cylinder further comprises two air bag electromagnetic valves 25, 26. In the embodiment, the gas cylinder further comprises two air bags (not shown in the figure), which are communicated with the II ports of the two air bag electromagnetic valves 25, 26 in a one-to-one correspondence. One of the air bags is inflated and can be used to push the first pneumatic component. The first pneumatic component can extrude the soft diaphragm of the liquid cassette 3 of the peritoneal dialysis machine and the corresponding position of the frame, so that the position of the soft diaphragm of the cassette 3 is tightly attached to the wall surface of the first side and the wall surface of the second side of the base, thereby forming a plurality of independent and sealed valve cavities, pump chambers and flow passages in the cassette 3. The other air bag can be deflated when the peritoneal dialysis machine fails to push the fifth pneumatic component to extrude all liquid pipelines, so that the liquid passages are cut off and the liquid in all liquid pipelines cannot flow, thereby preventing the liquid from continuing to flow and causing harm to the human body. The II ports of the two air bag electromagnetic valves 25, 26 are respectively communicated with two of the pressure measuring through holes A9, so that the pressures of the two air bags can be respectively detected. When the pressure is lower than the set value, the electromagnetic valve 25 or 26 is started to communicate the I port and the II port, the air bag is supplied with air through the air inlet passage 15 to the set value, and the air pressure of the air bag is controlled at 0 mbar to +1000 mbar.

[0199] The gas cylinder is further provided with two air bag electromagnetic valves 25, 26, and the air inlet hole K25, 26 of each air bag electromagnetic valve is communicated with the air inlet passage 15 at one end and communicated with the I port of the air bag electromagnetic valve 25, 26 at the other end. Figure 13As shown, one end is communicated with the gas return channel 16, and the other end is used for communicating with the III port of the intake channel intake solenoid valve 22;

[0200] The intake hole K23 of the intake channel outlet solenoid valve, as shown, one end is communicated with the intake channel 15, and the other end is used for communicating with the I port of the intake channel outlet solenoid valve 23. Figure 12

[0201] The gas cylinder further comprises the intake channel intake solenoid valve 22 and the intake channel outlet solenoid valve 23, the II port of the intake channel intake solenoid valve 22 is communicated with the atmosphere, and the II port of the intake channel outlet solenoid valve 23 is communicated with the atmosphere.

[0202] Through the intake channel intake solenoid valve 22 and the intake channel outlet solenoid valve 23, the intake channel 15 can be communicated with the atmosphere, so as to realize the air supplement from the atmosphere and the air exhaust to the atmosphere. The wall of the bottle body A is further provided with an atmospheric hole A10 communicated with the II port of the intake channel intake solenoid valve 22, which forms an air inlet, and the wall of the bottle body A is further provided with an atmospheric hole A10 communicated with the II port of the intake channel outlet solenoid valve 23, which forms an air outlet. The air inlet and the air outlet are both provided with an air filter column A7, which filters the air entering and exiting the gas cylinder, keeps the gas in the gas circuit clean and dust-free, reduces the risk of air circuit blockage caused by dust and the like, and also reduces the working noise.

[0203] The gas cylinder is further provided with:

[0204] The intake hole (not shown in the figure) of the left pump chamber atmospheric solenoid valve, one end is communicated with the driver deforming the membrane of the left pump chamber driving the liquid pump, and the other end is used for communicating with the II port of the left pump chamber atmospheric solenoid valve 212;

[0205] The intake hole (not shown in the figure) of the right pump chamber atmospheric solenoid valve, one end is communicated with the driver deforming the membrane of the right pump chamber driving the liquid pump, and the other end is used for communicating with the II port of the right pump chamber atmospheric solenoid valve 215.

[0206] The gas cylinder further comprises the left pump chamber atmospheric solenoid valve 212 and the right pump chamber atmospheric solenoid valve 215, the I port of the left pump chamber atmospheric solenoid valve 212 is communicated with the atmosphere, and the I port of the right pump chamber atmospheric solenoid valve 215 is communicated with the atmosphere, so as to control the left pump chamber and the right pump chamber to realize the air exhaust to the atmosphere.

[0207] The above examples are only exemplary embodiments of the present application, and are not used to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications or equivalent replacements made by those skilled in the art to the present application within the spirit and protection scope of the present application also fall within the protection scope of the present application.​

Claims

1. A liquid cartridge for a peritoneal dialysis machine, characterized in that, The substrate includes a matrix and a soft diaphragm covering a first side wall and a second side wall of the matrix, with the first and second sides facing each other. The first side of the matrix is ​​provided with a plurality of independent liquid tanks and two independent pump tanks recessed relative to its wall surface, and the second side of the matrix is ​​provided with a plurality of flow channels recessed relative to its wall surface. Each of the liquid tanks is provided with a cylindrical valve seat, the valve seat having a through hole with one end communicating with the liquid tank and the other end communicating with one of the flow channels. With the bottom wall of the liquid tank as a reference, the distance between the end of the valve seat away from the reference and the reference is less than the distance between the wall of the first side of the base and the reference. When the soft diaphragm is pressed against the walls of the first and second sides of the substrate, it can seal multiple liquid tanks to form independent filling valve chambers, replenishment valve chambers, human body communication valve chambers, waste liquid valve chambers, left pump first valve chamber, left pump second valve chamber, right pump first valve chamber, and right pump second valve chamber, as well as seal two pump tanks to form independent left pump chambers and right pump chambers, and seal multiple flow channels to form independent left pump flow channels, right pump flow channels, first flow channels, and second flow channels. The substrate is also provided with multiple connecting holes, which are connected one-to-one with the filling valve chamber, replenishment valve chamber, human body communication valve chamber, and waste liquid valve chamber. The first flow channel is selectively connected to the valve seat in the injection valve chamber and the valve seat in the waste liquid valve chamber; the second flow channel is selectively connected to the valve seat in the replenishment valve chamber and the valve seat in the human body communication valve chamber; the left pump flow channel is selectively connected to the valve seat in the first valve chamber of the left pump and the valve seat in the second valve chamber of the left pump; the right pump flow channel is selectively connected to the valve seat in the first valve chamber of the right pump and the valve seat in the second valve chamber of the right pump; the first valve chamber of the left pump and the first valve chamber of the right pump are respectively connected to the first flow channel; the second valve chamber of the left pump and the second valve chamber of the right pump are respectively connected to the second flow channel; the left pump chamber is connected to the left pump flow channel; and the right pump chamber is connected to the right pump flow channel.

2. The cartridge according to claim 1, characterized in that, The cartridge includes three of the aforementioned replenishment valve chambers.

3. The cartridge according to claim 2, characterized in that, Four of the infusion valve chamber, human body communication valve chamber, waste liquid valve chamber, and three replenishment valve chambers are arranged along the width direction of the leftmost end of the cartridge. These four chambers are connected to the four connecting holes located on the first side of the base in a one-to-one correspondence. The other two chambers are arranged along the width of the cartridge to the right of the four chambers. The second side of the base is provided with two liquid inlet channels, which are connected to the other two chambers in a one-to-one correspondence. The two liquid inlet channels are also connected to the two connecting holes located on the second side of the base in a one-to-one correspondence. All connecting holes are located at the leftmost end of the base.

4. The cartridge according to claim 3, characterized in that, The two chambers are one of the infusion valve chamber and one of the three replenishment valve chambers.

5. The cartridge according to claim 3, characterized in that, The left and right pump chambers are elliptical, and the depth of the middle part of the left and right pump chambers is greater than the depth of the edge. The left pump first valve chamber and the left pump second valve chamber are located on the left side of the left pump chamber. The left pump flow channel is opposite to the edge of the left pump chamber near the left pump first valve chamber and the left pump second valve chamber. The right pump first valve chamber and the right pump second valve chamber are located between the left and right pump chambers. The right pump flow channel is opposite to the edge of the right pump chamber near the right pump first valve chamber and the right pump second valve chamber.

6. The cartridge according to claim 3, characterized in that, The substrate is provided with connecting holes at the following positions: the two inlet channels opposite to the other two chambers; the left pump first valve chamber opposite to the first flow channel; the right pump first valve chamber opposite to the first flow channel; the left pump second valve chamber opposite to the second flow channel; the right pump second valve chamber opposite to the second flow channel; the left pump chamber opposite to the left pump flow channel; and the right pump chamber opposite to the right pump flow channel.

7. The cartridge according to claim 1, characterized in that, The substrate is integrally formed by injection molding.

8. The cartridge according to any one of claims 1-7, characterized in that, The substrate has a first vertical wall that is perpendicular to the wall of the first side and a second vertical wall that is opposite to the first vertical wall. Both the first vertical wall and the second vertical wall are connected to the left and right ends of the cartridge. The right part of the first vertical wall is closer to the second vertical wall than the left part.

9. The cartridge according to any one of claims 1-7, characterized in that, The cartridge includes two soft membranes, each of which is bonded to the edge of the side surface of the substrate in a one-to-one correspondence.

10. A peritoneal dialysis machine, characterized in that, The device includes a pressure control device and a cartridge as described in any one of claims 1-9. The pressure control device includes a gas cylinder and a pneumatic device connected to the gas cylinder via a gas pipe. The pneumatic device drives the soft diaphragm of the cartridge to press against or move away from the base under the pressure of the gas output from the gas cylinder.

11. The peritoneal dialysis machine according to claim 10, characterized in that, The pneumatic device includes a first pneumatic component having a frame structure that mates with the wall surface of a first side and a second side of the base; the pneumatic device also includes a plurality of second pneumatic components that are one-to-one opposite to the plurality of valve seats; the pneumatic device also includes a third pneumatic component opposite to the left pump chamber and a fourth pneumatic component opposite to the right pump chamber.

12. The peritoneal dialysis machine according to claim 10 or 11, characterized in that, The gas cylinder includes a cylinder body and a cap, and the cylinder body has the following openings: The air intake passage is used to connect to the positive pressure end of the air pump; Large positive pressure air chamber; The air inlet of the large positive pressure air chamber inlet solenoid valve has one end connected to the air inlet channel and the other end used to connect to port I of the large positive pressure air chamber inlet solenoid valve. The outlet of the large positive pressure air chamber inlet solenoid valve is used to connect one end to port II of the large positive pressure air chamber inlet solenoid valve, and the other end to the large positive pressure air chamber. A positive pressure channel is connected to the positive pressure chamber. The air inlet of multiple liquid circuit control solenoid valves is connected at one end to the large positive pressure channel, and at the other end to be connected to the port I of the multiple liquid circuit control solenoid valves one by one. The large negative pressure channel is connected to port III of multiple liquid circuit control solenoid valves; The air outlets of multiple liquid circuit control solenoid valves are connected at one end to a large negative pressure channel, and at the other end to be connected to the III port of the multiple liquid circuit control solenoid valves in a one-to-one correspondence. A large negative pressure air chamber is connected to the large negative pressure air channel; The return air passage has one end connected to the negative pressure end of the air pump; The air inlet of the large negative pressure air chamber return solenoid valve is connected at one end to the large negative pressure air chamber, and at the other end to the II port of the large negative pressure air chamber return solenoid valve. The outlet of the large negative pressure air chamber return solenoid valve has one end for connecting to port III of the large negative pressure air chamber return solenoid valve, and the other end for connecting to the return air channel. Small positive pressure air chamber; The air inlet of the small positive pressure air chamber inlet solenoid valve has one end connected to the air inlet channel and the other end used to connect to port I of the small positive pressure air chamber inlet solenoid valve. The outlet of the small positive pressure air chamber inlet solenoid valve is used to connect one end to port II of the small positive pressure air chamber inlet solenoid valve, and the other end to the small positive pressure air chamber. The left pump chamber passage is used to communicate with the driver of the membrane in the left pump chamber that drives the liquid pump; The right pump chamber passage is used to communicate with the driver of the membrane in the right pump chamber that drives the liquid pump; The air inlet of the first solenoid valve for the outlet of the small positive pressure air chamber is connected at one end to the small positive pressure air chamber, and at the other end is used to connect to the I port of the first solenoid valve for the outlet of the small positive pressure air chamber. The outlet port of the first solenoid valve for the small positive pressure air chamber is used to connect one end to port II of the first solenoid valve for the small positive pressure air chamber, and the other end is connected to the left pump chamber channel. The air inlet of the second solenoid valve for the outlet of the small positive pressure air chamber is connected at one end to the small positive pressure air chamber, and at the other end is used to connect to the I port of the second solenoid valve for the outlet of the small positive pressure air chamber. The outlet port of the second solenoid valve for the small positive pressure air chamber is used to connect one end to port II of the second solenoid valve for the small positive pressure air chamber, and the other end is connected to the right pump chamber channel. Small negative pressure air chamber; The air inlet of the first solenoid valve for the small negative pressure air chamber is connected at one end to the left pump chamber channel, and at the other end to the II port of the first solenoid valve for the small negative pressure air chamber. The air outlet of the first solenoid valve for the small negative pressure air chamber is used to connect one end to port III of the first solenoid valve for the small negative pressure air chamber, and the other end is connected to the small negative pressure air chamber. The air inlet of the second solenoid valve for the small negative pressure air chamber is connected at one end to the right pump chamber channel, and at the other end to the II port of the second solenoid valve for the small negative pressure air chamber. The air outlet of the second solenoid valve for the small negative pressure air chamber is used to connect one end to port III of the second solenoid valve for the small negative pressure air chamber, and the other end is connected to the small negative pressure air chamber. The air inlet of the small negative pressure air chamber return solenoid valve is connected to the small negative pressure air chamber at one end and to port II of the small negative pressure air chamber return solenoid valve at the other end. The outlet of the small negative pressure air chamber return solenoid valve has one end for connecting to port III of the small negative pressure air chamber return solenoid valve, and the other end for connecting to the return air channel. The large positive pressure air chamber, the large negative pressure air chamber, the small positive pressure air chamber, and the small negative pressure air chamber are independent of each other, and the cover body forms a seal to each of the large positive pressure air chamber, the large negative pressure air chamber, the small positive pressure air chamber, and the small negative pressure air chamber. The gas cylinder also includes a large positive pressure gas chamber inlet solenoid valve, multiple liquid circuit control solenoid valves, a large negative pressure gas chamber return solenoid valve, a small positive pressure gas chamber inlet solenoid valve, a small positive pressure gas chamber outlet first solenoid valve, a small positive pressure gas chamber outlet second solenoid valve, a small negative pressure gas chamber inlet first solenoid valve, a small negative pressure gas chamber inlet second solenoid valve, and a small negative pressure gas chamber return solenoid valve. The gas cylinder also includes a circuit board disposed on the cylinder body. The circuit board is equipped with a controller that is connected to each solenoid valve and the gas pump respectively to control each solenoid valve and the gas pump.

13. The peritoneal dialysis machine according to claim 12, characterized in that, The gas cylinder is also equipped with: The air inlet of the high-pressure chamber air inlet solenoid valve has one end connected to the air inlet channel and the other end connected to port I of the high-pressure chamber air inlet solenoid valve. The outlet of the high-pressure chamber inlet solenoid valve has one end connected to port II of the high-pressure chamber inlet solenoid valve and the other end connected to the high-pressure chamber. The air inlet of the first solenoid valve for the high-pressure chamber outlet is connected at one end to the high-pressure chamber and at the other end to the I port of the first solenoid valve for the high-pressure chamber outlet. The outlet port of the first solenoid valve for high-pressure chamber outlet has one end connected to port II of the first solenoid valve for high-pressure chamber outlet, and the other end connected to the left pump chamber channel. The air inlet of the second solenoid valve for the high-pressure chamber outlet is connected at one end to the high-pressure chamber and at the other end to the I port of the second solenoid valve for the high-pressure chamber outlet. The outlet port of the second solenoid valve for high-pressure chamber outlet has one end connected to port II of the second solenoid valve for high-pressure chamber outlet, and the other end connected to the right pump chamber channel. The gas cylinder also includes a high-pressure chamber inlet solenoid valve, a high-pressure chamber outlet first solenoid valve, and a high-pressure chamber outlet second solenoid valve, which are respectively connected to the circuit board.

14. The peritoneal dialysis machine according to claim 12, characterized in that, The gas cylinder also has two air inlets for airbag solenoid valves. One end of the air inlet of each airbag solenoid valve is connected to the air inlet channel, and the other end is used to connect to the I port of the airbag solenoid valve. The gas cylinder also includes two airbag solenoid valves, and the two airbag solenoid valves are respectively connected to the circuit board.

15. The peritoneal dialysis machine according to claim 12, characterized in that, The gas cylinder is also equipped with: The air outlet of the intake solenoid valve in the intake channel is connected at one end to the return air channel, and at the other end to the III port of the intake solenoid valve in the intake channel. The intake port of the intake channel solenoid valve is connected to the intake channel at one end and to port I of the intake channel solenoid valve at the other end. The gas cylinder also includes an inlet solenoid valve and an outlet solenoid valve for the inlet channel. The inlet solenoid valve and the outlet solenoid valve are respectively connected to the circuit board. Port II of the inlet solenoid valve is open to the atmosphere, and port II of the outlet solenoid valve is open to the atmosphere.

16. The peritoneal dialysis machine according to claim 12, characterized in that, The gas cylinder is also equipped with: The air inlet of the left pump chamber atmospheric solenoid valve has one end for communicating with the left pump chamber channel and the other end for communicating with port II of the left pump chamber atmospheric solenoid valve. The air inlet of the right pump chamber atmospheric solenoid valve has one end for communicating with the right pump chamber passage and the other end for communicating with port II of the right pump chamber atmospheric solenoid valve. The gas cylinder also includes a left pump chamber atmospheric solenoid valve and a right pump chamber atmospheric solenoid valve. The I port of the left pump chamber atmospheric solenoid valve is connected to the atmosphere, and the I port of the right pump chamber atmospheric solenoid valve is connected to the atmosphere. The left pump chamber atmospheric solenoid valve and the right pump chamber atmospheric solenoid valve are respectively connected to the circuit board.

17. The peritoneal dialysis machine according to claim 12, characterized in that, The air pressure in the large positive pressure air chamber, the small positive pressure air chamber, and the high pressure chamber is controlled between 0 mbar and +500 mbar, while the air pressure in the large negative pressure air chamber and the small negative pressure air chamber is controlled between -500 mbar and 0 mbar.

18. The peritoneal dialysis machine according to claim 12, characterized in that, The air pressure inside the airbag is controlled between 0 mbar and +1000 mbar.

19. The peritoneal dialysis machine according to claim 12, characterized in that, The air pressure in both the left and right pump chamber channels is controlled between -500 mbar and +500 mbar.

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