CN116271301A - Liquid cassette for peritoneal dialysis machine and peritoneal dialysis machine - Google Patents

Abstract

The invention relates to a liquid cassette for a peritoneal dialysis machine and the peritoneal dialysis machine, wherein the liquid cassette comprises a substrate and a soft diaphragm, a plurality of mutually independent liquid grooves and two mutually independent pump grooves are formed in a first side of the substrate, and a plurality of circulation grooves are formed in a second side of the substrate; a cylindrical valve seat is arranged in each liquid tank; the soft diaphragm can seal a plurality of liquid grooves, pump grooves and circulation grooves when being pressed on the wall surfaces of the first side and the second side of the matrix to form mutually independent filling valve cavities, liquid 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, left pump chambers, right pump chambers, left pump flow channels, right pump flow channels, first flow channels and second flow channels respectively. The liquid cassette of the peritoneal dialysis machine can overcome the defects that the existing liquid cassette needs to be provided with more valves and channels and is complex in structure.

Description

Liquid cassette for peritoneal dialysis machine and peritoneal dialysis machine

technical field

The invention relates to the field of peritoneal dialysis, in particular to a liquid cartridge for a peritoneal dialysis machine and a peritoneal dialysis machine.

Background technique

Automated peritoneal dialysis is an important means of renal replacement therapy. It has been paid more and more attention because of its advantages such as convenient use, flexible dialysis dose, strong ability to remove small molecular solutes, and good social regression of patients. The peritoneal dialysis machine is the core device or equipment to realize the automatic 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 infusion and extraction. At present, the commonly used clinical model is pressure control type. Existing pressure-controlled or hybrid-controlled peritoneal dialysis machines drive the opening and closing of the solenoid valve on the liquid circuit of the cassette through the pressure of the gas to guide the flow route of the liquid in the cassette, thereby realizing the perfusion, rehydration and Drainage or waste process. Among them, a large number of valves and passages need to be arranged in the liquid cassette, and its structure is very complicated.

Contents of the invention

The invention provides a liquid cassette for a peritoneal dialysis machine, which can overcome the disadvantages that the existing liquid cassette needs to be provided with many valves and passages and has a complex structure.

The liquid cassette for a peritoneal dialysis machine of the present invention 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, so The first side of the base body is provided with a plurality of mutually independent liquid tanks and two mutually independent pump tanks that are recessed relative to its wall surface, and the second side of the base body is provided with a plurality of circulation grooves that are recessed relative to its wall surface;

Each of the liquid tanks is provided with a cylindrical valve seat, and the valve seat has a through hole that communicates with the liquid tank at one end and communicates with one of the fluid tanks at the other end. As a reference, the distance between the end of the valve seat away from the reference and the reference is smaller than the distance between the wall surface of the first side of the base body and the reference;

When the soft diaphragm is pressed against the wall surface of the first side and the second side of the base body, it can seal a plurality of the liquid tanks to respectively form a filling valve chamber, a liquid replenishing valve chamber, and a human body communication valve chamber that are independent of each other. , the waste liquid valve cavity, the first valve cavity of the left pump, the second valve cavity of the left pump, the first valve cavity of the right pump, the second valve cavity of the right pump, and seal the two pump grooves to form independent left pumps respectively chamber and the right pump chamber, and seal a plurality of flow grooves to form mutually independent left pump flow channel, right pump flow channel, first flow channel and second flow channel, the base is also provided with a plurality of connection holes, a plurality of The connecting pipe holes communicate with the filling valve chamber, the liquid replenishing valve chamber, the human body communication valve chamber and the waste liquid valve chamber in one-to-one correspondence;

Wherein the valve seat in the perfusion valve cavity and the valve seat in the waste liquid valve cavity are all connected with the first flow channel, and the valve seat in the liquid replenishment valve cavity and the valve seat in the human body communication valve cavity are all connected with the second flow channel The valve seat in the first valve cavity of the left pump and the valve seat in the second valve cavity of the left pump are connected with the flow channel of the left pump, the valve seat in the first valve cavity of the right pump and the valve seat in the second valve cavity of the right pump The valve seats are all communicated with the right pump flow channel, the first valve cavity of the left pump and the first valve cavity of the right pump are respectively communicated with the first flow channel, and the second valve cavity of the left pump and the second valve cavity of the right pump are respectively In communication with the second flow channel, the left pump chamber communicates with the left pump flow channel, and the right pump chamber communicates with the right pump flow channel.

Preferably, the cassette includes three fluid refill chambers. Four of the perfusion valve cavity, the human body communication valve cavity, the waste liquid valve cavity, and the three replenishment valve cavities are arranged at the leftmost end of the cassette along the width direction of the leftmost end of the cassette. communicate with the four nozzle holes located on the first side of the base body in one-to-one correspondence, the other two cavities are arranged on the right side of the four cavities along the width of the cassette, and the second side of the base body Two liquid inlet passages are provided, and the two liquid inlet passages communicate with the other two cavities in one-to-one correspondence, and the two liquid inlet passages communicate with the two connection holes on the second side of the base body. One-to-one communication, the connection holes are all set at the leftmost end of the base body. The two chambers are respectively the perfusion valve chamber and one of the three liquid replenishment chambers.

Preferably, 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, and the left pump first valve chamber and the left pump second valve chamber 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 first valve chamber of the left pump and the second valve chamber of the left pump, and the first valve chamber of the right pump and the second valve chamber of the right pump are located between the left pump chamber and the right pump chamber, and the right pump flow channel and the right pump chamber are close to the edge of the first valve chamber of the right pump and the second valve chamber of the right pump relatively.

Preferably, the base body is at the position where the two liquid inlet passages are opposite to the other two chambers, the first valve chamber of the left pump is opposite to the first flow passage, and the first valve chamber of the right pump is opposite to the second flow passage. The relative position of the flow passage, the relative position of the second valve chamber of the left pump and the second flow passage, the relative position of the second valve chamber of the right pump and the second flow passage, the relative position of the left pump chamber and the left pump flow passage, the relative position of the right pump The opposite positions of the chamber and the right pump flow channel are provided with communication holes connecting the first side and the second side of the base body. The base body is integrally formed by injection molding.

Preferably, the base body has a first vertical wall perpendicular to the wall on the first side and a second vertical wall opposite to the first vertical wall, the first vertical wall and the second vertical wall are both connected to the left end of the cassette and At the right end, the right part of the first vertical wall is closer to the second vertical wall than the left part.

Preferably, the cassette includes two pieces of the soft membrane, and each piece of the soft membrane is glued to the edges of the side surfaces on both sides of the base body in a one-to-one correspondence.

The present invention also provides a peritoneal dialysis machine, comprising a pressure control device and the cassette according to any one of claims 1-9, the pressure control device comprising a gas cylinder and a pneumatic cylinder connected to the gas cylinder through a trachea. device, the pneumatic device drives the soft diaphragm of the cassette to press against or leave the base body under the pressure of the gas output from the gas cylinder. The pneumatic device includes a first pneumatic part, and the first pneumatic part has a frame structure matched with the wall surface of the first side and the wall surface of the second side of the base body; the pneumatic device also includes a plurality of the Valve seats—a plurality of second pneumatic elements opposite to each other; the pneumatic device also includes a third pneumatic element opposite to the left pump chamber and a fourth pneumatic element opposite to the right pump chamber.

As preferably, the gas cylinder includes a bottle body and a cover, and the bottle body is provided with:

The air intake channel is used to communicate with the positive pressure end of the air pump;

Large positive pressure air cavity;

The air intake hole of the large positive pressure air cavity intake solenoid valve has one end connected to the air intake passage, and the other end is used to connect with the I port of the large positive pressure air cavity intake solenoid valve;

One end of the outlet hole of the air inlet solenoid valve of the large positive pressure air chamber is used to connect with the port II of the air inlet solenoid valve of the large positive pressure air chamber, and the other end is connected with the air chamber of large positive pressure;

A large positive pressure channel communicates with the large positive pressure air chamber;

Air intake holes of multiple hydraulic control solenoid valves, one end of the air intake holes of the multiple hydraulic control solenoid valves is respectively connected with the positive air pressure channel, and the other end is used to communicate with the I port of the multiple hydraulic control solenoid valves. one-to-one connection;

The large negative air pressure channel is connected with the III ports of the plurality of hydraulic control solenoid valves;

The air outlets of multiple liquid circuit control solenoid valves, one end of the air outlet holes of multiple liquid circuit control solenoid valves are respectively connected with the large negative pressure channel, and the other end is used for one-to-one correspondence with the port III of multiple liquid circuit control solenoid valves. connect;

A large negative pressure air chamber communicates with the large negative pressure channel;

The air return channel, one end is used to communicate with the negative pressure end of the air pump;

One end of the air intake hole of the large negative pressure air chamber air return solenoid valve is connected to the large negative pressure air chamber, and the other end is used to connect with the port II of the large negative pressure air chamber air return electromagnetic valve;

The outlet hole of the large negative pressure air chamber return air solenoid valve, one end is used to connect with the III port of the large negative pressure air chamber return air solenoid valve, and the other end communicates with the return air passage;

Small positive pressure air cavity;

The air inlet hole of the small positive pressure air cavity intake solenoid valve has one end connected to the air intake passage, and the other end is used to connect with the I port of the small positive pressure air cavity intake solenoid valve;

The outlet hole of the small positive pressure air cavity intake solenoid valve is used to connect with the II port of the small positive pressure air cavity intake solenoid valve, and the other end is connected to the small positive pressure air cavity;

a left pump chamber channel for communicating with a driver that drives a membrane of the left pump chamber of the liquid pump;

a right pump chamber channel for communicating with a driver that drives the membrane of the right pump chamber of the liquid pump;

The air inlet hole of the first electromagnetic valve of the air outlet of the small positive pressure air chamber is connected with the small positive pressure air chamber at one end, and the other end is used to be connected with the I port of the first electromagnetic valve of the air outlet of the small positive pressure air chamber;

One end of the outlet hole of the first solenoid valve for air outlet of the small positive pressure air chamber is used to connect with the port II of the first electromagnetic valve for air outlet of the small positive pressure air chamber, and the other end communicates with the channel of the left pump chamber;

The air inlet hole of the second electromagnetic valve of the air outlet of the small positive pressure air cavity is connected with the small positive pressure air cavity at one end, and the other end is used to be connected with the I port of the second electromagnetic valve of the air outlet of the small positive pressure air cavity;

The air outlet hole of the second electromagnetic valve for air outlet from the small positive pressure air chamber, one end is used to connect with the II port of the second electromagnetic valve for air outlet from the small positive pressure air chamber, and the other end communicates with the channel of the right pump chamber;

Small negative pressure air cavity;

The air inlet hole of the first electromagnetic valve for air intake in the small negative pressure air cavity, one end communicates with the channel of the left pump chamber, and the other end is used to connect with the port II of the first electromagnetic valve for air intake in the small negative pressure air cavity;

The air outlet of the small negative pressure air chamber inlet first electromagnetic valve, one end is used to connect with the III port of the small negative pressure air chamber inlet first electromagnetic valve, and the other end communicates with the small negative pressure air chamber;

The air inlet hole of the second electromagnetic valve for air intake in the small negative pressure air cavity, one end communicates with the channel of the right pump chamber, and the other end is used to connect with the port II of the second electromagnetic valve for air intake in the small negative pressure air cavity;

The air outlet of the second solenoid valve for air intake in the small negative pressure air cavity, one end is used to connect with the III port of the second electromagnetic valve for air intake in the small negative pressure air cavity, and the other end communicates with the small negative pressure air cavity;

One end of the inlet hole of the air return solenoid valve of the small negative pressure air cavity is connected with the small negative pressure air cavity, and the other end is used to connect with the port II of the return air solenoid valve of the small negative pressure air cavity;

The air outlet of the small negative pressure air chamber return air solenoid valve, one end is used to connect with the III port of the small negative pressure air chamber return air solenoid valve, and the other end communicates with the return air passage;

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 is suitable 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. The air cavities are respectively sealed and closed;

The gas cylinder also includes the large positive pressure air cavity intake solenoid valve, multiple liquid circuit control solenoid valves, large negative pressure air cavity return solenoid valve, small positive pressure air cavity intake solenoid valve, small positive pressure air cavity outlet first Solenoid valve, small positive pressure air chamber outlet second solenoid valve, small negative pressure air chamber intake first solenoid valve, small negative pressure air chamber intake second solenoid valve and small negative pressure air chamber return air solenoid valve, the air The bottle also includes a circuit board arranged on the bottle body, and the circuit board is provided with a controller connected to each electromagnetic valve and air pump to control each electromagnetic valve and air pump.

As preferably, the gas cylinder is also provided with:

The air inlet of the high-pressure chamber intake solenoid valve, one end communicates with the air intake passage, and the other end is used to communicate with the I port of the high-pressure chamber intake solenoid valve;

The air outlet of the high-pressure chamber intake solenoid valve, one end is used to communicate with the II port of the high-pressure chamber intake solenoid valve, and the other end communicates with the high-pressure chamber;

The air inlet hole of the high-pressure chamber outlet first electromagnetic valve, one end communicates with the high-pressure chamber, and the other end is used to communicate with the I port of the high-pressure chamber outlet first electromagnetic valve;

The air outlet of the first solenoid valve for air outlet in the high-pressure chamber, one end is used to communicate with the port II of the first solenoid valve for air outlet in the high-pressure chamber, and the other end is in communication with the channel of the left pump chamber;

The air inlet of the high-pressure chamber outlet second solenoid valve, one end communicates with the high-pressure chamber, and the other end is used to communicate with the I port of the high-pressure chamber outlet second solenoid valve;

The air outlet of the second solenoid valve for air outlet in the high-pressure chamber, one end is used to communicate with the port II of the second solenoid valve for air outlet in the high-pressure chamber, and the other end is in communication with the channel of the right pump chamber;

The gas cylinder also includes the high-pressure chamber intake solenoid valve, the high-pressure chamber outlet first solenoid valve and the high-pressure chamber outlet second solenoid valve, the high-pressure chamber inlet solenoid valve, the high-pressure chamber outlet first solenoid valve and the high-pressure chamber outlet solenoid valve. The air outlet second solenoid valves are respectively connected with the circuit boards.

As preferably, the gas cylinder is also provided with two inlet holes of the airbag solenoid valve, one end of the inlet hole of each airbag solenoid valve communicates with the air inlet channel, and the other end is used to communicate with the I port of the airbag solenoid valve , the gas cylinder further includes two airbag solenoid valves, and the two airbag solenoid valves are respectively connected to the circuit board.

As preferably, the gas cylinder is also provided with:

The air outlet of the air intake solenoid valve of the air intake passage, one end communicates with the return air passage, and the other end is used to communicate with the III port of the air intake solenoid valve of the air intake passage;

The air inlet of the air inlet channel air outlet solenoid valve, one end communicates with the air inlet channel, and the other end is used to communicate with the I port of the air inlet channel air outlet electromagnetic valve;

The gas cylinder also includes the air inlet solenoid valve of the air inlet passage and the air outlet air solenoid valve of the air inlet passage, the air inlet electromagnetic valve of the air inlet passage and the air outlet electromagnetic valve of the air inlet passage are respectively connected with the circuit board, the The port II of the air intake electromagnetic valve of the air intake channel communicates with the atmosphere, and the port II of the air outlet electromagnetic valve of the air intake channel communicates with the atmosphere.

As preferably, the gas cylinder is also provided with:

The air inlet hole of the atmospheric solenoid valve in the left pump chamber, one end is used to communicate with the channel of the left pump chamber, and the other end is used to communicate with the port II of the atmospheric solenoid valve of the left pump chamber;

The air inlet hole of the atmospheric solenoid valve in the right pump chamber, one end is used to communicate with the channel of the right pump chamber, and the other end is used to communicate with the port II of the atmospheric solenoid valve in the right pump chamber;

Described gas cylinder also comprises described left pump chamber atmospheric solenoid valve and right pump chamber atmospheric solenoid valve, and the I port of described left pump chamber atmospheric solenoid valve communicates with atmosphere, and the I port of described right pump chamber atmospheric solenoid valve communicates with atmosphere. The atmosphere communicates, and the atmospheric solenoid valve of the left pump chamber and the atmospheric solenoid valve of the right pump chamber are respectively connected with the circuit board.

Preferably, the air pressures of the large positive pressure chamber, the small positive pressure chamber and the high pressure chamber are all controlled at 0 mbar to +500 mbar, and the air pressures of the large negative pressure chamber and the small negative pressure chamber are controlled at -500 mbar to 0 mbar. The air pressure of the air bag is controlled at 0mbar～+1000mbar. The air pressures of the left pump chamber passage and the right pump chamber passage are both controlled at -500mbar～+500mbar.

Compared with the prior art, the present invention has the following beneficial effects:

1. In the cassette of the present invention, the valve cavity and the flow channel are arranged on different sides of the base body, and the valve seat is set in the valve cavity. Only two valve cavities need to be set up corresponding to the left pump and the right pump respectively, corresponding to each connecting hole , that is, corresponding to the input or output port of each liquid, a valve cavity and a valve seat are set, and three flow channels are set to realize the liquid guidance in the whole process of dialysate perfusion, rehydration and waste discharge. This process will be carried out below. Details. In the case of setting the same number of nozzle holes, that is, under the situation of realizing the same function, the cassette of the present invention makes full use of the space occupied by the base body, the volume of the cassette is smaller, and the valve provided is larger than that of the existing one. Fewer valves are used in the technology and the structure is simpler.

2. The air cylinder of the peritoneal dialysis machine of the present invention is provided with a large positive pressure air cavity, a large negative pressure air cavity, a small positive pressure air cavity and a small negative pressure air cavity on the gas cylinder, and each channel and the use of the gas cylinder are processed on the gas cylinder. In order to connect and install the inlet and outlet of each solenoid, the solenoid valve is directly installed on the gas cylinder without additional manifold, which can realize the functions of the existing gas cylinder and manifold, making the structure more simple and compact, occupying The volume is also smaller, and there is no need to set a gas pipe between the gas cylinder and the manifold, which also reduces the chance of gas leakage.

Description of drawings

FIG. 1 is a schematic diagram of an exploded structure of a liquid cartridge for a peritoneal dialysis machine according to an embodiment of the present invention.

FIG. 2 is a schematic structural view of the first side of the fluid cartridge for a peritoneal dialysis machine according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of the connection between the fluid cartridge and the fluid tube for a peritoneal dialysis machine according to an embodiment of the present invention.

FIG. 4 is a schematic structural view of the second side of the base body of the fluid cartridge for a peritoneal dialysis machine according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of a gas cylinder of a peritoneal dialysis machine according to an embodiment of the present invention.

FIG. 6 is a structural schematic diagram of a gas cylinder of a peritoneal dialysis machine and various solenoid valves installed in the gas cylinder according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of the solenoid valves of the gas cylinder of the peritoneal dialysis machine according to an embodiment of the present invention.

FIG. 8 is a schematic perspective view of the three-dimensional structure of the cylinder body of the gas cylinder of the peritoneal dialysis machine according to an embodiment of the present invention. The cylinder body in this figure is upside down relative to FIG. 5 .

Fig. 9 is a structural schematic diagram of the gas cylinder of the peritoneal dialysis machine in the top view direction according to an embodiment of the present invention.

Fig. 10 is a schematic cross-sectional structure diagram of the gas cylinder of the peritoneal dialysis machine along the line L-L in Fig. 9 according to an embodiment of the present invention.

Fig. 11 is a schematic cross-sectional structure diagram of the gas cylinder of the peritoneal dialysis machine along the line H-H in Fig. 9 according to an embodiment of the present invention.

Fig. 12 is a schematic cross-sectional structure diagram of the gas cylinder of the peritoneal dialysis machine along the line I-I in Fig. 9 according to an embodiment of the present invention.

Fig. 13 is a schematic cross-sectional structure diagram of the gas cylinder of the peritoneal dialysis machine along the line J-J in Fig. 9 according to an embodiment of the present invention.

Fig. 14 is a schematic cross-sectional structure diagram of the gas cylinder of the peritoneal dialysis machine along line K-K in Fig. 9 according to an embodiment of the present invention.

Fig. 15 is a schematic diagram of the gas circuit principle of the gas cylinder of the peritoneal dialysis machine according to an embodiment of the present invention.

reference sign

A bottle body, A1 first pump connector hole, A2 first pump connector, A3 second pump connector hole, A4 second pump connector, A5 reinforcement rib, A6 pagoda connector, A7 air filter column, A8 installation protrusion, A9 measuring Pressure through hole, A10 atmospheric through hole, A11 load hole, A12 raised post;

B cover;

C gasket;

D circuit board;

11 large positive pressure air chambers, 12 large negative pressure air chambers, 13 small positive pressure air chambers, 14 small negative pressure air chambers,

15 air intake channels, 16 air return channels, 17 large positive air pressure channels, 18 large negative air pressure channels, 19 left pump room channels, 1a right pump room channels;

21 large negative pressure air cavity return air solenoid valve,

22 air intake channel air intake solenoid valve,

23 Intake channel outlet solenoid valve,

24 large positive pressure air cavity intake solenoid valves,

25,26 air bag solenoid valve,

27 high-pressure cavity intake solenoid valve,

28 small negative pressure air cavity return air solenoid valve,

29 small positive pressure air cavity intake solenoid valve,

210 High-pressure chamber outlet first solenoid valve,

211 small positive pressure air chamber outlet first solenoid valve,

212 Atmospheric solenoid valve in the left pump room,

213 small negative pressure air chamber intake first solenoid valve,

214 small negative pressure air chamber intake second solenoid valve,

215 Atmospheric solenoid valve in the right pump room,

216 small positive pressure air cavity outlet second solenoid valve,

217 High-pressure chamber outlet second solenoid valve,

218-227 hydraulic control solenoid valve,

The air outlet of the K21 large negative pressure air chamber return air solenoid valve,

The air outlet of the air intake solenoid valve of the K22 air intake channel,

The air inlet hole of the air outlet solenoid valve of the K23 air inlet channel,

The intake hole of the K24 large positive pressure air cavity intake solenoid valve,

The air intake hole of K25, K26 air bag solenoid valve,

The intake hole of the K27 high-pressure cavity intake solenoid valve,

The air outlet of the K28 small negative pressure air chamber return air solenoid valve,

The air intake hole of the K29I small positive pressure air cavity air intake solenoid valve,

The air outlet of the K29Ⅱ small positive pressure air chamber intake solenoid valve,

K211I small positive pressure air chamber outlet air inlet hole of the first solenoid valve,

K211Ⅱ small positive pressure air cavity outlet air outlet of the first solenoid valve,

K216I small positive pressure air chamber outlet air inlet hole of the second solenoid valve,

K216Ⅱ small positive pressure air cavity outlet air outlet hole of the second solenoid valve,

K218Ⅰ-K227Ⅰ liquid circuit control solenoid valve air inlet,

K218Ⅲ-K227Ⅲ liquid circuit control solenoid valve air outlet;

3 cassettes

31 base body, 311 liquid tank, 312 pump tank, 313 valve seat, 32 soft diaphragm, 33 liquid tube, 34 connector, 35 tube clip, 36 notch, 37 wall on the first side, 38 wall on the second side, 39 a vertical wall, 30 a second vertical wall;

3a filling valve chamber, 3b first replenishing valve chamber, 3c second replenishing valve chamber, 3d third replenishing valve chamber, 3e human body communication valve chamber, 3f waste liquid valve chamber, 3g left pump first valve chamber, 3h left pump second Two valve chambers, 3i right pump first valve chamber, 3j right pump second valve chamber, 3k left pump chamber, 3l right pump chamber, 3m first flow passage, 3n second flow passage, 3o left pump flow passage, 3p right pump Flow channel, 3q first liquid inlet channel, 3r second liquid inlet channel, 3s through hole;

Detailed ways

The present invention provides a liquid cassette 3 for a peritoneal dialysis machine. The cassette 3 is disposable. As shown in FIGS. The wall surface 37 of the second side and the wall surface 38 of the second side are the soft diaphragm 32, and the first side is opposite to the second side. In this embodiment, the wall surface of the first side and the wall surface of the second side are parallel and opposite. In this embodiment, the cassette 3 includes two pieces of the soft membrane 32 , and each piece of the soft membrane 32 is bonded to the edges of the side surfaces on both sides of the base body 31 in a one-to-one correspondence. In other embodiments, the same larger soft diaphragm 32 may also be bonded to the side edges on both sides of the base body 31 .

As shown in FIG. 2 , the first side of the base body 31 is provided with a plurality of mutually independent liquid grooves 311 and two mutually independent pump grooves 312 recessed relative to its wall surface. As shown in FIG. 3 , the second side of the base body 31 is provided with a plurality of flow grooves recessed relative to its wall surface, and the flow grooves are used to form a plurality of flow channels, which will be introduced in the next paragraph. Each of the liquid tanks 311 is provided with a cylindrical valve seat 313. The valve seat 313 has a through hole that communicates with the liquid tank 311 at one end and communicates with one of the fluid tanks at the other end. The axis of the through hole is It coincides with the axis of the cylinder, and the bottom wall of the liquid tank 311 is used as the reference, and the distance between the end of the valve seat 313 away from the reference and the reference is smaller than the distance between the wall surface of the first side of the base 31 and the reference. The distance between, that is, in the depth direction of the liquid tank 31, the end of the valve seat 313 away from the reference is lower than the wall surface of the first side, in this embodiment, the other end of the valve seat 313 is flush with the bottom wall of the liquid tank 311 , preferably, the valve seat 313 and the base body 31 are integrally injection molded.

As shown in FIG. 2, when the soft diaphragm is pressed against the walls of the first side and the second side of the base 31, it can seal a plurality of the liquid grooves 311 to form independent filling valve chambers 3a respectively. , replenishment valve cavity, human body communication valve cavity 3e, waste fluid valve cavity 3f, left pump first valve cavity 3g, left pump second valve cavity 3h, right pump first valve cavity 3i, right pump second valve cavity 3j, and Seal the two pump grooves 312 to form mutually independent left pump chamber 3k and right pump chamber 3l, and seal a plurality of circulation grooves to form mutually independent left pump flow passage 3o, right pump flow passage 3p, first flow passage respectively. channel 3m and the second flow channel 3n, the base body 31 is also provided with a plurality of connection holes, and the plurality of connection holes are in one-to-one correspondence with the perfusion valve chamber 3a, the fluid replacement valve chamber, the human body communication valve chamber 3e and the waste The liquid valve chamber 3f communicates.

Wherein the valve seat 313 in the perfusion valve chamber 3a and the valve seat 313 in the waste liquid valve chamber 3f are both communicated with the first flow passage 3m, and the valve seat 313 in the fluid replenishment valve chamber is connected to the valve seat 313 in the human body communication valve chamber 3e Both communicate with the second flow channel 3n, the valve seat 313 in the first valve cavity 3g of the left pump and the valve seat 313 in the second valve cavity 3h of the left pump both communicate with the left pump flow channel 3o, the first valve of the right pump The valve seat 313 in the chamber 3i and the valve seat 313 in the second valve chamber 3j of the right pump are all communicated with the right pump flow channel 3p, and the first valve chamber 3g of the left pump and the first valve chamber 3i of the right pump are respectively connected with the first flow channel. The passage 3m communicates, the second valve chamber 3h of the left pump and the second valve chamber 3j of the right pump communicate with the second flow passage 3n respectively, the left pump chamber 3k communicates with the flow passage 3o of the left pump, and the right pump The chamber 3l communicates with the right pump flow channel 3p.

The soft diaphragm 32 of the cassette 3 of the present invention can be deformed under the action of the pneumatic device. Independent valve cavity and pump cavity, the second side forms a plurality of mutually independent flow channels. When the part of the soft diaphragm 32 opposite to the valve seat 313 is tightly attached to one end of the valve seat 313, in this embodiment, the end of the soft diaphragm 32 that communicates with the valve cavity is tightly closed to form a block, which can make the corresponding The flow between the valve chamber on the first side of 31 and the flow channel on the second side of the base body 31 is blocked. When the soft diaphragm 32 is driven away from one end of the valve seat 313, the liquid can flow from the valve cavity to the corresponding flow channel. In the cassette 3 of the present invention, the valve cavity and the flow passage are arranged on different sides of the base body 31, and a valve seat 313 is provided in the valve cavity. Only two valve cavities need to be set up corresponding to the left pump and the right pump respectively, corresponding to each connecting pipe Hole, that is, corresponding to each liquid input or output port, a valve cavity and a valve seat 313 are provided, and three flow channels are provided to realize the liquid guidance in the whole process of dialysate perfusion, fluid replacement and waste discharge. Details are given below. In the case of setting the same number of nozzle holes, that is, under the same function, the cassette 3 of the present invention makes full use of the space occupied by the base body 31, the volume of the cassette 3 is smaller, and the set valve Compared with the prior art, fewer valves are used and the structure is simpler. For example, in this embodiment, the cassette is provided with 6 ports, and 10 valve seats are provided correspondingly, so that the fluid circuit conversion of all procedures of peritoneal dialysis can be completed, while the existing structure requires 13 to 14 valves to complete .

Four of the perfusion valve cavity 3a, the human body communication valve cavity 3e, the waste liquid valve cavity 3f and the three replenishment valve cavities are arranged at the leftmost end of the cassette 3 along the width direction of the leftmost end of the cassette 3, The four cavities communicate with the four nozzle holes on the first side of the base body 31 in one-to-one correspondence, and the other two cavities are arranged on the right side of the four cavities along the width of the cassette 3 . The second side of the base body 31 is provided with a first liquid inlet channel 3q and a second liquid inlet channel 3n, the two liquid inlet channels communicate with the other two cavities one by one, and the two liquid inlet channels are connected to The two connecting holes on the second side of the base body 31 are communicated in a one-to-one correspondence, and the connecting holes are both arranged at the leftmost end of the base body 31 .

In this embodiment, the cassette 3 includes three liquid replenishment chambers. As shown in FIG. Cavity 3b, the third rehydration valve cavity 3d, and the human body communication valve cavity 3e. 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 first valve chamber 3g of the left pump, the filling valve chamber 3a, the second pump chamber The second liquid replenishment valve chamber 3c and the second valve chamber 3h of the left pump are arranged around the left side of the left pump, and the first valve chamber 3g of the left pump and the second valve chamber 3h of the left pump are located on the left side of the left pump chamber 3k, so The left pump flow channel 3o is parallel to and opposite to the edge of the left pump chamber 3k near the left pump first valve cavity 3g and the left pump second valve cavity 3h, and the right pump first valve cavity 3i and the right pump second valve cavity are The second valve chamber 3j is located between the left pump chamber 3k and the right pump chamber 3l, the right pump flow channel 3p and the right pump chamber 3l are close to the right pump first valve chamber 3i and the right pump second valve chamber The edges of 3j are parallel and opposite. The filling valve chamber 3a and the second replenishing valve chamber 3c are arranged between the first valve chamber 3g of the left pump and the second valve chamber 3h of the left pump.

Preferably, as shown in FIG. 2 , the base body 31 is at the position where the two liquid inlet passages are opposite to the other two chambers, the first valve chamber 3g of the left pump is opposite to the first flow passage 3m, and the right The position where the first valve cavity 3i of the pump is opposite to the first flow channel 3m, the position where the second valve cavity 3h of the left pump is opposite to the second flow channel 3n, the position where the second valve cavity 3j of the right pump is opposite to the second flow channel 3n, the left pump The position where the pump chamber 3k is opposite to the left pump flow channel 3o, and the position where the right pump chamber 3l is opposite to the right pump flow channel 3p are all provided with a communication hole 3s that communicates with the first side and the second side of the base body 31, so as to realize the position The corresponding valve cavity or pump chamber communicates with the channel.

As shown in Fig. 2 and Fig. 3, the base body 31 has a first vertical wall surface 39 perpendicular to the wall surface of the first side and a second vertical wall surface 30 opposite to the first vertical wall surface, the first vertical wall surface 39 and the second vertical wall surface The two vertical walls 30 are connected to the left end and the right end of the cassette 3, and the right part of the first vertical wall 39 is closer to the second vertical wall 30 than the left, so that a notch 36 can be formed on the upper right side of the cassette 3 , the notch 36 forms a mark, which can prevent the cassette 3 from being reversed when the cassette 3 is put into the peritoneal dialysis machine. In this embodiment, the right end of the cassette 3 is arc-shaped, which also forms a distinction between the left end and the right end of the cassette 3 .

In this embodiment, as shown in Figure 4, each joint hole is provided with a joint 34, and each joint 34 is connected to a liquid pipe 33, and the liquid pipe 33 is provided with a pipe clip 35, through the joint 34 and the liquid pipe 33, the filling valve The cavity 3a is connected with the heating liquid bag (not shown in the figure), the human body communication valve cavity 3e is used to connect with the patient, the waste liquid valve cavity 3f is connected with the waste liquid bag (not shown in the figure), and a plurality of fluid replacement bags (not shown in the figure) Not shown in ) communicates with the three filling valve chambers.

Perfusion process:

When the filling valve chamber 3a, the first valve chamber 3i of the right pump, the second valve chamber 3h of the left pump, and the valve seat 313 in the human body communication valve chamber 3e are simultaneously opened, the fourth pneumatic part absorbs the soft diaphragm 32 and faces the right pump chamber 3l position, the volume of the right pump chamber 3l is increased, and the third pneumatic element squeezes the position where the soft diaphragm 32 is opposite to the left pump chamber 3k, and the volume of the left pump chamber 3k is reduced. The heated dialysate flows from the heating fluid bag through the first liquid inlet channel 3q to the perfusion valve cavity 3a, then flows through the first flow channel 3m, the first valve cavity 3i of the right pump, and the right pump flow channel 3p, and enters the right pump Room 3l. At the same time, the dialysate in the left pump chamber 3k sequentially passes 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, and finally enters the patient's body.

When the filling valve chamber 3a, the second valve chamber 3j of the right pump, the first valve chamber 3g of the left pump and the valve seat 313 in the human body communication valve chamber 3e are simultaneously opened, the volume of the left pump chamber 3k increases and the volume of the right pump chamber 3l decreases. The heated dialysate flows from the heating fluid bag through the first liquid inlet channel 3q to the perfusion valve chamber 3a, and then flows through the first flow channel 3m, the first valve chamber 3g of the left pump, the left pump flow channel 3o, and the left pump chamber 3k. At the same time, the dialysate in the right pump chamber 3l passes 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.

When the dialysate in the heating fluid bag runs out, enter the fluid rehydration process, and when the first fluid rehydration bag is replenished:

When the valve seat 313 in the first fluid replenishment valve chamber 3b, the filling valve chamber 3a, the second valve chamber 3j of the right pump, and the first valve chamber 3g of the left pump are simultaneously opened, the volume of the right pump chamber 3l increases, and the volume of the first fluid replacement bag The dialysate sequentially flows through the first liquid replenishment valve cavity 3b, the second flow channel 3n, the second valve cavity 3j of the right pump, and the right pump flow channel 3p to enter the right pump chamber 3l. At the same time, the volume of the left pump chamber 3k shrinks, and the dialysate in the left pump chamber 3k flows 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 to enter the heating fluid bag for heating .

When the valve seats 313 in the first replenishment valve chamber 3b, the filling valve chamber 3a, the first valve chamber 3i of the right pump, and the second valve chamber 3h of the left pump are simultaneously opened, the volume of the left pump chamber 3k increases, and the first replenishment valve chamber 3b The dialysate inside flows through the first liquid replenishment valve cavity 3b, the second flow channel 3n, the second valve cavity 3h of the left pump, the left pump flow channel 3o, and enters the left pump chamber 3k. At the same time, the volume of the right pump chamber 3l shrinks, and the dialysate in the right pump chamber 3l flows through the right pump flow channel 3p, the right pump first valve cavity 3i, the first flow channel 3m, and the filling valve cavity 3a to enter the heating fluid bag for heating .

After the first rehydration bag is completed, continue the perfusion process. When the dialysate in the heating fluid bag is exhausted, the second rehydration bag will be refilled, specifically:

When the valve seat 313 in the second fluid replenishing valve chamber 3c, the filling valve chamber 3a, the second valve chamber 3j of the right pump, and the first valve chamber 3g of the left pump are simultaneously opened, the volume of the right pump chamber 3l increases, and the volume of the second fluid replenishing bag The dialysate sequentially flows through the second liquid inlet channel 3r, the second liquid replenishment valve chamber 3c, the second flow channel 3n, the right pump second valve chamber 3j, and the right pump flow channel 3p to enter the right pump chamber 3l. At the same time, the volume of the left pump chamber 3k shrinks, and the dialysate in the left pump chamber 3k flows 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 to enter the heating fluid bag for heating .

When the valve seats 313 in the second replenishment valve chamber 3c, the filling valve chamber 3a, the first valve chamber 3i of the right pump, and the second valve chamber 3h of the left pump are simultaneously opened, the volume of the left pump chamber 3k increases, and the second replenishment valve chamber 3c The dialysate inside flows through the second replenishment valve cavity 3c, the second flow channel 3n, the left pump second valve cavity 3h, the left pump flow channel 3o, and enters the left pump chamber 3k. At the same time, the volume of the right pump chamber 3l shrinks, and the dialysate in the right pump chamber 3l flows through the right pump flow channel 3p, the right pump first valve cavity 3i, the first flow channel 3m, and the filling valve cavity 3a to enter the heating fluid bag for heating .

After the completion of the second rehydration bag, continue the perfusion process. When the dialysate in the heating fluid bag is exhausted, the third rehydration bag will be refilled, specifically:

When the valve seat 313 in the third fluid replenishment valve chamber 3d, the filling valve chamber 3a, the second valve chamber 3j of the right pump, and the first valve chamber 3g of the left pump are opened simultaneously, the volume of the right pump chamber 3l increases, and the volume of the third fluid replenishment bag The dialysate flows through the third liquid replenishing valve chamber 3d, the second flow channel 3n, the right pump second valve chamber 3j, the right pump flow channel 3p and enters the right pump chamber 3l. At the same time, the volume of the left pump chamber 3k shrinks, and the dialysate in the left pump chamber 3k flows 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 to enter the heating fluid bag for heating .

When the valve seat 313 in the third replenishment valve chamber 3d, the filling valve chamber 3a, the first valve chamber 3i of the right pump, and the second valve chamber 3h of the left pump are simultaneously opened, the volume of the left pump chamber 3k increases, and the third replenishment valve chamber 3d The dialysate inside flows through the third rehydration valve cavity 3d, the second flow channel 3n, the second valve cavity 3h of the left pump, the left pump flow channel 3o, and enters the left pump chamber 3k. At the same time, the volume of the right pump chamber 3l shrinks, and the dialysate in the right pump chamber 3l flows through the right pump flow channel 3p, the right pump first valve cavity 3i, the first flow channel 3m, and the filling valve cavity 3a to enter the heating fluid bag for heating .

After the dialysate stays in the patient's body for a set time, it enters the waste process:

When the valve seat 313 in the human body connecting valve chamber 3e, waste liquid valve chamber 3f, the second valve chamber 3j of the right pump, and the first valve chamber 3g of the left pump are simultaneously opened, the volume of the right pump increases, and the waste liquid passes through the human body connecting valve chamber in sequence 3e, the second connecting channel, the second valve cavity of the right pump 3j, and the right pump connecting channel enter the right pump. At the same time, the volume of the left pump shrinks, and the liquid in the left pump chamber 3k is discharged through the left pump connecting channel, the first left pump valve cavity 3g, the first connecting channel, and the waste liquid valve cavity 3f in sequence.

When the valve seat 313 in the human body communication valve chamber 3e, waste fluid valve chamber 3f, right pump first valve chamber 3i, and left pump second valve chamber 3h is simultaneously opened, the volume of the left pump increases, and the waste liquid passes through the human body communication valve chamber in sequence 3e, the second connecting passage, the first valve chamber of the left pump 3g, the connecting passage of the left pump enters the left pump. At the same time, the volume of the right pump shrinks, and the liquid in the right pump chamber 3l is discharged through the right pump connecting channel, the first valve cavity 3i, the second connecting channel, and the waste liquid valve cavity 3f.

The present invention also provides a peritoneal dialysis machine, comprising a pressure control device and the cassette 3 as described above, the pressure control device includes a gas cylinder and a pneumatic device connected to the gas cylinder through a trachea (not shown in the figure) , the pneumatic device drives the soft diaphragm 32 of the cartridge 3 to compress or leave the base 31 under the pressure of the gas output from the gas cylinder. The pneumatic device includes a first pneumatic part, the first pneumatic part has a frame structure matched with the wall surface of the first side and the wall surface of the second side of the base body 31, and the first pneumatic part makes the soft diaphragm 32 and the wall surface of the second side The relative position of the frame is close to or away from the wall surface of the first side and the wall surface of the second side of the base body 31 to form various valve chambers, pump chambers and flow passages. The pneumatic device also includes a plurality of second pneumatic parts that are opposite to the plurality of valve seats 313 one by one, and the second pneumatic parts drive the soft diaphragm 32 to a position opposite to a certain valve seat 313 to make it close to or leave the valve seat 313. Valve seat 313, so as to realize the opening and closing of the liquid circuit; the pneumatic device also includes a third pneumatic part opposite to the left pump chamber 3k and a fourth pneumatic part opposite to the right pump chamber 3l, the third pneumatic device The pneumatic part and the fourth pneumatic part squeeze the soft diaphragm 32 in turn against the left pump chamber 3k and the right pump chamber 3l to make it discharge liquid, or alternately absorb the soft diaphragm 32 and the left pump chamber 3k and right pump chamber 3l relative position so that it absorbs the liquid.

The gas bottle of the peritoneal dialysis machine of the present invention includes a bottle body A and a cover body B. As shown in Figure 8, the bottle body A is provided with a large positive pressure air chamber 11, a large negative pressure air chamber 12, a small positive pressure air chamber 13 and a small negative pressure air chamber 14, which are independent of each other. 11. The large negative pressure air chamber 12, the small positive pressure air chamber 13 and the small negative pressure air chamber 14 are respectively closed. In this embodiment, as shown in Figure 6, a gasket C is provided between the cover body B and the bottle body A to form a seal between each air cavity. In this embodiment, a silicone gasket is used, which has good sealing performance , not easy to age, so that the cylinder has a longer service life. The outer wall of the bottle body A is provided with an installation protrusion A8, and the installation protrusion A8 is provided with an installation through hole, which can be fixed together with a fixing frame or other supports after passing through the installation through hole by a bolt. When the cover body B is fixed to the bottle body A, the cover body B forms the bottom wall of the gas cylinder, and the openings of 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 face the cover body b. As shown in Figure 5, the top wall of the gas cylinder is provided with a plurality of inlet and outlet holes for solenoid valves, which are used to install multiple solenoid valves. The connection relationship and function of each solenoid valve and solenoid valve hole will be carried out one by one below introduce. All the solenoid valves used in this embodiment are as shown in Fig. 7, which are two-position three-way valves with I port, II port and III port, and all the valves are normally closed valves.

Described bottle body A is provided with:

The air intake channel 15, as shown in Figure 12, is used to communicate with the positive pressure end of the air pump, and is used to receive the positive pressure airflow generated by the air pump;

The intake hole K24 of the large positive pressure air cavity air intake solenoid valve, as shown in FIG.

The outlet hole (not shown in the figure) of the large positive pressure air cavity intake solenoid valve), one end is used to connect with the II port of the large positive pressure air cavity intake solenoid valve 24, and the other end is connected with the large positive pressure air cavity 11;

Through the air intake channel 15, the air intake hole K24 of the large positive pressure air cavity intake solenoid valve, the air outlet hole of the large positive pressure air cavity intake solenoid valve and the large positive pressure air cavity intake solenoid valve 24, the air intake channel 15 can be controlled to enter the large positive pressure air cavity 11, so as to control the pressure in the large positive pressure air chamber 11, the bottle body A is provided with a plurality of pressure measuring through holes A9, each pressure measuring through hole A9 is equipped with a pagoda joint A6, and each pagoda joint A6 is connected with a trachea (not shown in the figure), the air pipe is connected to the air pressure sensor (not shown in the figure), and the port II of the air inlet K24 of the air intake solenoid valve of the large positive pressure air chamber communicates with one of the pressure measuring through holes A9, so that the large positive pressure can be detected The air pressure of the air pressure chamber 11. The air pressure of the large positive pressure air chamber is controlled at 0mbar～+500mbar. In this embodiment, the pressure in the large positive pressure air chamber 11 is controlled at about 400mbar. When the air pressure value of the large positive pressure air chamber 11 is lower than the set lower limit value, Make the port II of the electromagnetic valve 24 communicate with the port I, and the air intake channel 15 is paired with the large positive pressure air chamber 11 to replenish the air pressure to the set value.

Bottle A is also provided with:

The large positive pressure channel 17 communicates with the large positive pressure air cavity 11;

The intake holes K218I-K227I of multiple liquid circuit control solenoid valves, as shown in Figure 10, one end of the air intake holes K218I-K227I of multiple liquid circuit control solenoid valves is respectively connected with the said positive pressure channel 17, and the other end is connected with It is connected with ports I of multiple hydraulic control solenoid valves 218-227 in one-to-one correspondence;

Large negative air pressure channel 18;

The air outlets K218Ⅲ-K227Ⅲ of multiple liquid circuit control solenoid valves, as shown in Figure 11, one end of the air outlet K218Ⅲ-K227Ⅲ of multiple liquid circuit control solenoid valves is respectively connected with the large negative pressure channel 18, and the other end is used to communicate with the multiple The ports III of the two liquid circuit control solenoid valves 218-227 are connected in one-to-one correspondence, wherein Fig. 14 shows the air inlet K218I of the liquid circuit control solenoid valve 218, the air outlet K218III of the liquid circuit control solenoid valve, the liquid circuit control solenoid valve The control hole K218Ⅱ of the valve and the load hole A11 used to connect the control hole K218Ⅱ and the outside of the gas cylinder;

Air return channel 16, one end is used to communicate with the negative pressure end of the air pump;

The air intake hole (not shown in the figure) of the large negative pressure air chamber return air solenoid valve, one end communicates with the large negative pressure air chamber 12, and the other end is used to connect with the II of the large negative pressure air chamber return air solenoid valve 21. Mouth-to-mouth;

The air outlet K21 of the large negative pressure air chamber return air solenoid valve, as shown in Figure 13, one end is used to connect with the III port of the large negative pressure air chamber return air solenoid valve 21, and the other end communicates with the return air passage 16;

Through the above structure, the gas in the large positive pressure air chamber 11 can flow to the large positive pressure channel 17, and then enter multiple liquid circuit control solenoid valves 218-227. When the gas passes through the liquid circuit control solenoid valve 218-227, the positive pressure generated by the port II enters the corresponding second pneumatic part, so that the position of the soft diaphragm and the second pneumatic part is close to the corresponding valve seat, blocking the liquid circuit. make it disconnected. When the port II of a liquid circuit control solenoid valve 218-227 communicates with port III, the negative pressure generated by the gas passing through the port II of the liquid circuit control solenoid valve 218-227 and flowing back to port III causes the second pneumatic part to drive the soft The corresponding position of the diaphragm leaves the corresponding valve seat, so that the liquid circuit is connected. The pressure of the large negative pressure air chamber 12 is controlled at 0mbar˜-500mbar. In this embodiment, it is controlled at about -400mbar, and the port II of the outlet hole K21 of the return air solenoid valve of the large negative pressure air chamber communicates with one of the pressure measuring through holes A9, so that the air pressure of the large negative pressure air chamber 12 can be detected. When the absolute value of the air pressure in the large negative pressure air chamber 12 is lower than the set lower limit, the port II of the solenoid valve 21 is communicated with port III, and the pressure on the large negative pressure air chamber is restored to the set value, as shown in Fig. 15 shows the schematic diagram of the gas circuit of the gas cylinder, and it can be seen from Fig. 15 that each electromagnetic valve guides the gas flow direction.

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

The cylinder is also provided with:

The air inlet K29I of the small positive pressure air cavity air intake solenoid valve, as shown in Figure 14, has one end connected to the air intake passage 15, and the other end is used to connect with the I port of the small positive pressure air cavity air intake electromagnetic valve 29;

The air outlet K29II of the air inlet solenoid valve of the small positive pressure air chamber is used to connect with the II port of the air inlet solenoid valve 29 of the small positive pressure air chamber at one end, and the other end is connected with the small positive pressure air chamber 13;

Small positive pressure air cavity intake electromagnetic valve 29 can be set through the air inlet K29I and air outlet of small positive pressure air cavity air intake electromagnetic valve, and the air pressure of small positive pressure air cavity 13 can be controlled by small positive pressure air cavity intake electromagnetic valve 29. The air pressure of the positive pressure air chamber 13 is controlled at 0-500mbar, and in this embodiment it is controlled at about 300mbar. The air pressure of the negative air pressure chamber 13, when the air pressure value of the small positive pressure air chamber 14 exceeds the set value, the solenoid valve 29 is activated, that is, the I port of the solenoid valve 29 is communicated with the II port, and the air intake channel 15 is connected to the small positive pressure air chamber. 13 Make up the pressure to the air pressure setting value.

Described bottle body A is also provided with:

The left pump chamber channel 19, as shown in Figure 14, is used to communicate with the driver (not shown) that drives the membrane deformation of the left pump chamber of the liquid pump (not shown), thereby driving the liquid into the left pump chamber or discharged from the left pump chamber;

The right pump chamber channel 1a, as shown in Figure 14, is used to communicate with the driver (not shown) that drives the membrane deformation of the right pump chamber of the liquid pump, thereby driving the liquid to enter the right pump chamber or discharge from the right pump chamber;

As shown in Figure 14, the inlet hole K211I of the first electromagnetic valve of the air outlet of the small positive pressure air chamber has one end connected to the small positive pressure air chamber 13, and the other end is used to connect with the I port of the first electromagnetic valve of the air outlet of the small positive pressure air chamber;

The outlet hole K211II of the first electromagnetic valve for air outlet from the small positive pressure air chamber is used to connect with the port II of the first electromagnetic valve for air outlet from the small positive pressure air chamber, and the other end is connected to the channel 19 of the left pump chamber, as shown in Figure 14;

The air inlet K216I of the second electromagnetic valve of the air outlet of the small positive pressure air cavity, as shown in Figure 14, one end is connected with the small positive pressure air cavity 13, and the other end is used to connect with the I port of the second electromagnetic valve 216 of the air outlet of the small positive pressure air cavity;

The outlet hole K216II of the second solenoid valve for the air outlet of the small positive pressure air chamber is used to connect with the II port of the second electromagnetic valve for air outlet of the small positive pressure air chamber, and the other end communicates with the channel 1a of the right pump chamber, as shown in Figure 14;

Through the above structure, the first solenoid valve 211 for air outlet of the small positive pressure air chamber and the second solenoid valve 216 for air outlet of the small positive pressure air chamber can be set. The pneumatic part squeezes the position where the soft diaphragm is opposite to the left pump chamber, so that the volume of the left pump chamber becomes smaller, and at this time, the liquid in the left pump chamber is squeezed out. When the port I and port II of the second electromagnetic valve 216 of the small positive pressure air cavity are in communication, the gas enters the fourth pneumatic part and squeezes the soft diaphragm opposite to the right pump chamber, at this time, the liquid in the right pump chamber is squeezed out. The first solenoid valve 211 and the second solenoid valve 216 of the small positive pressure air chamber can be controlled to make the I port and the II port alternately communicated, thereby controlling the liquid in the left pump chamber and the right pump chamber to be squeezed out in turn.

The bottle A is also provided with:

The air intake hole of the first solenoid valve (not shown in the figure) of the small negative pressure air chamber is used to communicate with the driver of the film deformation of the left pump chamber of the driving liquid pump at one end, and the other end is used to communicate with the small negative pressure gas chamber. The port II of the first electromagnetic valve 213 of air intake chamber is connected;

The outlet hole (not shown in the figure) of the first electromagnetic valve of the air intake of the small negative pressure air cavity, one end is used to connect with the port III of the first electromagnetic valve 213 of the air intake of the small negative pressure air cavity, and the other end is connected with the small negative pressure air cavity. The compressed air chamber 14 is connected;

The air inlet hole of the second solenoid valve (not shown in the figure) of the small negative pressure air cavity is used to communicate with the driver of the membrane deformation of the right pump chamber of the driving liquid pump at one end, and the other end is used to communicate with the small negative pressure gas chamber. The port II of the second electromagnetic valve 214 of air intake chamber is connected;

The outlet hole (not shown in the figure) of the second electromagnetic valve of the air inlet of the small negative pressure air chamber, one end is used to be connected with the port III of the second electromagnetic valve 214 of the air inlet of the small negative pressure air chamber, and the other end is connected with the small negative pressure air chamber. The compressed air chamber 14 is connected;

The air inlet hole (not shown in the figure) of the air return solenoid valve of the small negative pressure air chamber, one end communicates with the small negative pressure air chamber 14, and the other end is used to connect with the port II of the air return solenoid valve 28 of the small negative pressure air chamber ;

As shown in FIG. 13 , the outlet hole K28 of the small negative pressure air chamber return air solenoid valve is used to connect with the III port of the small negative pressure air chamber return air solenoid valve 28 , and the other end communicates with the return air passage 16 .

Through the above structure, the first electromagnetic valve 213 for the intake of the small negative pressure air cavity, the second electromagnetic valve 214 for the intake of the air intake of the small negative pressure air cavity, and the solenoid valve 28 for the return air of the small negative pressure air cavity can be set, and the gas in the left pump chamber can pass through the small negative pressure air cavity. The first electromagnetic valve 213 of the negative pressure air chamber enters the small negative pressure air chamber 14. At this time, the third pneumatic part absorbs the position of the soft diaphragm and the left pump chamber, so that the cavity volume of the left pump chamber becomes larger and sucks liquid. The gas in the right pump chamber can enter the small negative pressure air chamber 14 through the second electromagnetic valve 214 of the small negative pressure air cavity. The volume of the chamber cavity becomes larger, and the right pump chamber sucks liquid at this time. Control the two solenoid valves 213, 214 to make the port III and port II of the two communicate in turn, so that the gas in the left pump chamber and the right pump chamber enters the small negative pressure air chamber 14 in turn, thereby discharging the liquid in turn. The air pressure of the small negative pressure air cavity 14 is controlled at -500mbar～0mbar, in this embodiment, it is controlled at about -300mbar, and one of the port II of the small negative pressure air cavity air return solenoid valve 28 and the pressure measuring through hole A9 connected, so that the air pressure of the small negative pressure chamber 14 can be detected, and when the air pressure value of the small negative pressure chamber 13 is lower than the set lower limit value, the solenoid valve 28 is activated to make the III port and the II port communicate, so that the small negative pressure gas The air pressure value of chamber 13 returns to the air pressure setting value.

In the air cylinder of the peritoneal dialysis machine of the present invention, the large positive pressure air cavity 11, the large negative pressure air cavity 12, the small positive pressure air cavity 13 and the small negative pressure air cavity 14 are all arranged on the gas cylinder, so that the electromagnetic valve can be directly installed on the gas cylinder In addition, no manifold is needed, and the functions of the existing gas cylinder and manifold can be realized, making the structure more simple and compact, and the volume occupied is also smaller, and there is no need to set a gas pipe between the gas cylinder and the manifold, thus also Reduced chance of gas leaks. The bottle body can be integrally formed, such as die-casting or casting, and then process the channels on the bottle body and the air inlets and air outlets for connecting and installing the electromagnetics, which makes the processing easier, reduces the processing difficulty and reduces the amount of processing .

As shown in FIG. 8 , the large negative pressure air chamber 12 , the large positive pressure air chamber 11 , the small positive pressure air chamber 13 and the small negative pressure air chamber 14 are arranged in parallel and in sequence. The large negative pressure air chamber 12, the large positive pressure air chamber 11, the small positive pressure air chamber 13 and the small negative pressure air chamber 14 are all provided with at least one reinforcing rib A5, and the reinforcing rib A5 is perpendicular to the length direction of each air chamber, so One end of the reinforcing rib A5 is connected to one side inner wall of each air cavity, and the other end is connected to the opposite inner wall of each air cavity. The reinforcing rib A5 can strengthen the structure of the rectangular air cavity, prevent the walls of each air cavity from deforming, and thus make the structure of the gas cylinder more stable.

As shown in Figure 6, the gas cylinder also includes the large positive pressure air cavity intake solenoid valve 24, a plurality of liquid circuit control solenoid valves 218-227, a large negative pressure air cavity return air solenoid valve 21, and a small positive pressure air cavity intake solenoid valve. 29. The first electromagnetic valve 211 for the air outlet of the small positive pressure air cavity, the second electromagnetic valve 216 for the air outlet of the small positive pressure air cavity, the first electromagnetic valve 213 for the air intake of the small negative pressure air cavity, the second electromagnetic valve 214 for the air intake of the small negative pressure air cavity and Small negative pressure air cavity air return solenoid valve 28, the gas cylinder also includes a circuit board D located on the bottle body A, the circuit board D is provided with all solenoid valves and air pumps in the present invention to be connected respectively to control The controller (not shown in the figure) of each electromagnetic valve and air pump, in the present invention, all air pressure sensors are connected with controller, the working parameter of air pump and the pressure value of each chamber are set to controller, in air pressure sensor When the transmitted data is lower than the set value, the corresponding solenoid valve is controlled to supply air to the corresponding chamber so that the internal air pressure returns to the set value.

The gas cylinder of the peritoneal dialysis machine of the present invention integrates 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, all electromagnetic valves and the circuit board D into a module, realizing a high It is integrated, has a more compact structure, reduces the number of manifolds, and reduces the cost increase caused by the separation of the gas cylinder and the solenoid valve in the prior art. In addition, the entire gas cylinder can be replaced when maintenance is required, improving maintenance speed and efficiency.

As shown in Figure 5 and Figure 6, the outer wall of the top wall of the bottle is provided with a plurality of raised columns A12, and the raised columns A12 and the circuit board D are all provided with mounting holes, and screws pass through the mounting holes of the raised columns A12 The circuit board D is installed on the gas cylinder in the same way as the mounting holes of the circuit board D. In this way, the circuit board can be quickly positioned and installed. In this embodiment, the number of hydraulic control solenoid valves 218-227 is 10, of course, the number of hydraulic control solenoid valves 218-227 can also be set according to actual needs.

The cylinder is also provided with:

The air inlet K27 of the high-pressure chamber intake solenoid valve, as shown in Figure 12, one end communicates with the air intake passage 15, and the other end is used to communicate with the I port of the high-pressure chamber intake solenoid valve 27;

The outlet hole (not shown in the figure) of the high-pressure chamber intake solenoid valve, one end is used to communicate with the II port of the high-pressure chamber intake solenoid valve 27, and the other end communicates with the high-pressure chamber;

The air inlet (not shown in the figure) of the high-pressure chamber air outlet first solenoid valve, one end communicates with the high-pressure chamber, and the other end is used to communicate with the I port of the high-pressure chamber air outlet first electromagnetic valve 210;

The air outlet hole (not shown in the figure) of the first electromagnetic valve for air outlet in the high-pressure chamber, one end is used to communicate with the II port of the first electromagnetic valve 210 for air outlet in the high-pressure chamber, and the other end is communicated with the left pump chamber passage 19;

The inlet hole (not shown in the figure) of the high-pressure chamber air outlet second solenoid valve, one end communicates with the high-pressure chamber, and the other end is used to communicate with the I port of the high-pressure chamber air outlet first solenoid valve 210;

The air outlet hole (not shown in the figure) of the second electromagnetic valve of the high-pressure chamber air outlet, one end is used to communicate with the II port of the second electromagnetic valve 217 of the high-pressure chamber air outlet, and the other end is communicated with the right pump chamber passage 1a, and the left pump chamber The channel is controlled at -500mbar~+500mbar. When negative air pressure is passed through it, the air pressure is controlled at -500mbar~0mbar. When negative air pressure is passed through it, the air pressure is controlled at 0mbar~+500mbar.

Described gas cylinder also comprises described high-pressure chamber inlet electromagnetic valve 27, high-pressure chamber outlet air first electromagnetic valve 210 and high-pressure chamber outlet second electromagnetic valve 217, and described high-pressure chamber inlet electromagnetic valve 27, high-pressure chamber outlet first electromagnetic valve The valve 210 and the second solenoid valve 217 of the high-pressure chamber outlet are respectively connected to the circuit board D. In this embodiment, the gas cylinder also includes a high-pressure chamber module (not shown in the figure), the high-pressure chamber module includes a high-pressure chamber, and the pressure range of the high-pressure chamber is 0mbar～+500mbar. In this embodiment, the pressure of the high-pressure chamber The air pressure is controlled at about 350mbar, and the port II of the high-pressure chamber intake solenoid valve 27 communicates with one of the pressure measuring through holes A9, so that the air pressure of the high-pressure chamber can be detected. The high-pressure chamber of the high-pressure chamber module can be connected to the port II of the high-pressure chamber intake solenoid valve 27 through the high-pressure chamber inlet pipe (not shown in the figure), and the high-pressure chamber and the high-pressure chamber can be connected through the high-pressure chamber outlet pipe (not shown). The I port of the air outlet first electromagnetic valve 210 is connected with the I port of the high pressure cavity air outlet second electromagnetic valve respectively. The left pump chamber passage 19 and the right pump chamber passage 1a are provided with an air pressure sensor (not shown in the figure), which is used to detect the pressure of the left pump chamber passage and the right pump chamber passage, and record its pressure and pressure change value, according to The gas state equation calculates the volume of liquid pumped by the left and right pump chambers.

Described gas bottle also offers the air intake hole of two airbag electromagnetic valves 25,26, as shown in Figure 12, the air inlet hole K25 of each airbag electromagnetic valve, one end of 26 is communicated with described air intake channel 15, and the other end Used to communicate with the I ports of the airbag solenoid valves 25 and 26. Described gas cylinder also comprises two described airbag solenoid valves 25,26, and in the present embodiment, described gas cylinder also comprises two airbags (not shown in the figure), two airbags and two airbag solenoid valves 25 , 26 mouths are connected one by one. One of the airbags is inflated and can be used to push the first pneumatic part. The first pneumatic part can squeeze the position corresponding to the soft diaphragm of the liquid cassette 3 of the peritoneal dialysis machine and the frame, so that the position of the soft diaphragm is in line with the frame. The wall surface on the first side of the base body is in close contact with the wall surface on the second side, so that multiple independent and sealed valve chambers, pump chambers and flow passages are formed in the cassette 3 . Another air bag can be deflated when the peritoneal dialysis machine fails to push the fifth pneumatic part to squeeze all the liquid lines to cut off the liquid path, so that the liquid in all the liquid lines cannot flow, thereby preventing the liquid from continuing to flow. Flow can cause harm to the human body. The II ports of the two airbag solenoid valves 25 and 26 communicate with two of the pressure measuring through holes A9 respectively, so that the air pressure of the two airbags can be detected respectively. When the air pressure is lower than the set value, the solenoid valve 25 or 26 is activated. , so that port I and port II are connected, the air bag is replenished to the set value through the air intake channel 15, and the air bag air pressure is controlled at 0mbar to +1000mbar. The cylinder is also provided with:

The air outlet K22 of the air intake solenoid valve of the air intake passage, as shown in Figure 13, has one end communicating with the return air passage 16, and the other end is used to communicate with the port III of the air intake solenoid valve 22 of the air intake passage;

The air inlet K23 of the gas outlet electromagnetic valve of the air inlet passage, as shown in Figure 12, one end communicates with the air inlet passage 15, and the other end is used to communicate with the I port of the air outlet electromagnetic valve 23 of the air inlet passage.

Described gas bottle also comprises described air intake channel air intake electromagnetic valve 22 and air intake channel air outlet electromagnetic valve 23, the II port of described air intake channel air intake electromagnetic valve 22 communicates with the atmosphere, air intake channel air outlet electromagnetic valve 23 Port II is connected to the atmosphere.

Through the air inlet solenoid valve 22 of the air inlet passage and the air outlet electromagnetic valve 23 of the air inlet passage, the communication between the air inlet passage 15 and the atmosphere can be realized, so as to realize air replenishment from the atmosphere and exhaust to the atmosphere. The wall of the bottle body A is also provided with an atmospheric through hole A10 communicating with the II port of the air inlet solenoid valve 22 of the air intake passage. The atmospheric through hole A10 connected to the second port of the electromagnetic valve 23 forms an exhaust port. The air inlet and the exhaust port are equipped with air filter columns A7 to filter the air entering and discharging from the gas cylinder. Filtration keeps the gas in the gas circuit dust-free and clean, reducing the risk of failures such as gas circuit blockage caused by dust, etc., and can also reduce working noise.

The cylinder is also provided with:

The air inlet hole (not shown) of the atmospheric solenoid valve in the left pump chamber, one end communicates with the driver of the membrane deformation of the left pump chamber of the liquid pump, and the other end is used to communicate with the II of the atmospheric solenoid valve 212 of the left pump chamber. oral communication;

The air inlet hole (not shown in the figure) of the atmospheric solenoid valve in the right pump chamber, one end communicates with the driver of the membrane deformation of the right pump chamber that drives the liquid pump, and the other end is used to communicate with the II of the atmospheric solenoid valve 215 in the right pump chamber. The mouth communicates.

Described gas cylinder also comprises described left pump room atmospheric electromagnetic valve 212 and right pump room atmospheric electromagnetic valve 215, and the I mouth of described left pump room atmospheric electromagnetic valve 212 communicates with atmosphere, and described right pump room atmospheric electromagnetic valve 215 The I port of the pump is connected to the atmosphere, which can control the left pump chamber and the right pump chamber to exhaust to the atmosphere.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications or equivalent replacements made to the present invention by those skilled in the art within the spirit and protection scope of the present invention also fall within the protection scope of the present invention.

Claims (19)

1. A liquid cassette for a peritoneal dialysis machine, comprising a base and a flexible membrane covering a first side wall and a second side wall of the base, the first side and the second side being opposite, the first side of the base being provided with a plurality of mutually independent liquid tanks and two mutually independent pump tanks recessed relative to the wall thereof, the second side of the base being provided with a plurality of flow-through tanks recessed relative to the wall thereof;

A cylindrical valve seat is arranged in each liquid tank, one end of the valve seat is communicated with the liquid tank, the other end of the valve seat is communicated with one of the liquid tanks, the bottom wall of the liquid tank is taken as a reference, and the distance between one end of the valve seat, which is far away from the reference, and the reference is smaller than the distance between the wall surface of the first side of the base body and the reference;

the soft diaphragm can seal a plurality of liquid grooves to form mutually independent filling valve cavities, liquid supplementing valve cavities, human body communicating valve cavities, waste liquid valve cavities, left pump first valve cavities, left pump second valve cavities, right pump first valve cavities and right pump second valve cavities when being pressed on the wall surfaces of the first side and the second side of the matrix, seal two pump grooves to form mutually independent left pump cavities and right pump cavities respectively, seal a plurality of circulating grooves to form mutually independent left pump flow channels, right pump flow channels, first flow channels and second flow channels respectively, and the matrix is also provided with a plurality of pipe connecting holes which are communicated with the filling valve cavities, the liquid supplementing valve cavities, the human body communicating valve cavities and the waste liquid valve cavities in a one-to-one correspondence manner;

the valve seat in the pouring valve cavity and the valve seat in the waste liquid valve cavity are communicated with the first flow channel, the valve seat in the fluid supplementing valve cavity and the valve seat in the human body communicating valve cavity are 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 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 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 and the left pump flow channel are communicated, and the right pump chamber and the right pump flow channel are communicated.

2. The cartridge of claim 1, wherein the cartridge comprises three of the fluid-refill chambers.

3. The cartridge according to claim 2, wherein four chambers among the filling valve chamber, the human body communication valve chamber, the waste liquid valve chamber and the three fluid supplementing valve chambers are arranged at the leftmost end of the cartridge in the width direction of the leftmost end of the cartridge, the four chambers are communicated with four connecting pipe holes positioned at the first side of the base body in a one-to-one correspondence manner, the other two chambers are arranged at the right side of the four chambers in the width direction of the cartridge, the second side of the base body is provided with two fluid inlet channels, the two fluid inlet channels are communicated with the other two chambers in a one-to-one correspondence manner, and the two fluid inlet channels are communicated with the two connecting pipe holes positioned at the second side of the base body in a one-to-one correspondence manner, and the connecting pipe holes are all arranged at the leftmost end of the base body.

4. A cartridge according to claim 3, wherein the two chambers are each one of a priming valve chamber and three fluid-replacement chambers.

5. A cartridge as in claim 3, wherein the left and right pump chambers are elliptical and the depth of the middle portions of the left and right pump chambers is greater than the depth of the rim, the left and left pump first and second valve chambers are located to the left of the left pump chamber, the left pump flow passage is opposite the rim of the left pump chamber adjacent the left and left pump first and second valve chambers, the right and right pump first and second valve chambers are located between the left and right pump chambers, and the right pump flow passage is opposite the rim of the right pump chamber adjacent the right and first valve chambers.

6. A cartridge according to claim 3, wherein the base body is provided with communication holes communicating the first side and the second side of the base body at positions where the two liquid inlet passages are opposed to the other two chambers, respectively, at positions where the left pump first valve chamber is opposed to the first flow passage, at positions where the right pump first valve chamber is opposed to the first flow passage, at positions where the left pump second valve chamber is opposed to the second flow passage, at positions where the right pump second valve chamber is opposed to the second flow passage, at positions where the left pump chamber is opposed to the left pump flow passage, and at positions where the right pump chamber is opposed to the right pump flow passage.

7. The cartridge of claim 1, wherein the base is integrally formed by injection molding.

8. The cartridge of any one of claims 1-7, wherein the base has a first vertical wall perpendicular to the first side wall and a second vertical wall opposite the first vertical wall, each of the first and second vertical walls connecting a left end and a right end of the cartridge, a right portion of the first vertical wall being closer to the second vertical wall than the left portion.

9. A cartridge according to any one of claims 1 to 7, comprising two sheets of said flexible membrane, each of said sheets being bonded to the edges of the sides of said substrate in a one-to-one correspondence.

10. A peritoneal dialysis machine comprising a pressure control device and a cassette according to any one of claims 1 to 9, the pressure control device comprising a gas cylinder and a pneumatic device connected to the gas cylinder by a gas line, the pneumatic device driving a flexible membrane of the cassette to compress or to move away from the substrate under the pressure of the gas output from the gas cylinder.

11. The peritoneal dialysis machine of claim 10 wherein the pneumatic arrangement comprises a first pneumatic element having a frame structure that mates with the wall of the first side and the wall of the second side of the base; the pneumatic device further comprises a plurality of second pneumatic pieces which are opposite to the valve seats one by one; the pneumatic device further includes a third pneumatic member opposite the left pump chamber and a fourth pneumatic member opposite the right pump chamber.

12. The peritoneal dialysis machine of claim 10 or 11, wherein the gas cylinder comprises a cylinder body and a cover body, the cylinder body being provided with:

the air inlet channel is used for communicating with the positive pressure end of the air pump;

a large positive pressure air cavity;

one end of the air inlet hole of the large positive pressure air cavity air inlet electromagnetic valve is connected with the air inlet channel, and the other end of the air inlet hole is connected with the I port of the large positive pressure air cavity air inlet electromagnetic valve;

One end of the air outlet hole of the large positive pressure air cavity air inlet electromagnetic valve is connected with the II port of the large positive pressure air cavity air inlet electromagnetic valve, and the other end of the air outlet hole is connected with the large positive pressure air cavity;

the large positive pressure air channel is communicated with the large positive pressure air cavity;

one end of the air inlet holes of the liquid path control electromagnetic valves is respectively communicated with the large positive air pressure channel, and the other end of the air inlet holes of the liquid path control electromagnetic valves is connected with the I ports of the liquid path control electromagnetic valves in a one-to-one correspondence manner;

the atmosphere negative pressure channel is connected with the III ports of the liquid path control electromagnetic valves;

one ends of the air outlet holes of the liquid path control electromagnetic valves are respectively communicated with the atmospheric pressure channels, and the other ends of the air outlet holes of the liquid path control electromagnetic valves are connected with the III ports of the liquid path control electromagnetic valves in a one-to-one correspondence manner;

the large negative pressure air cavity is communicated with the large negative pressure channel;

one end of the air return channel is communicated with the negative pressure end of the air pump;

one end of the air inlet hole of the air return electromagnetic valve of the large negative pressure air cavity is communicated with the large negative pressure air cavity, and the other end of the air inlet hole is connected with the II port of the air return electromagnetic valve of the large negative pressure air cavity;

one end of the air outlet hole of the air return electromagnetic valve of the large negative pressure air cavity is connected with the III port of the air return electromagnetic valve of the large negative pressure air cavity, and the other end of the air outlet hole is communicated with the air return channel;

A small positive pressure air cavity;

one end of the air inlet hole of the small positive pressure air cavity air inlet electromagnetic valve is connected with the air inlet channel, and the other end of the air inlet hole is connected with the I port of the small positive pressure air cavity air inlet electromagnetic valve;

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

a left pump chamber channel for communicating with a driver that drives a membrane of a left pump chamber of the liquid pump;

a right pump chamber channel for communicating with a driver that drives a membrane of a right pump chamber of the liquid pump;

one end of the air inlet hole of the first electromagnetic valve is connected with the small positive pressure air cavity, and the other end of the air inlet hole is connected with the first electromagnetic opening of the air outlet of the small positive pressure air cavity;

one end of the air outlet hole of the first air outlet electromagnetic valve of the small positive pressure air cavity is connected with the II port of the air outlet first electromagnetic valve of the small positive pressure air cavity, and the other end of the air outlet hole is communicated with the left pump chamber channel;

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

one end of the air outlet hole of the second electromagnetic valve is connected with the second electromagnetic port of the air outlet of the small positive pressure air cavity, and the other end of the air outlet hole is communicated with the right pump chamber channel;

A small negative pressure air cavity;

one end of the air inlet hole of the first air inlet electromagnetic valve of the small negative pressure air cavity is communicated with the left pump chamber channel, and the other end of the air inlet hole is connected with the II port of the first air inlet electromagnetic valve of the small negative pressure air cavity;

one end of the air outlet hole of the small negative pressure air cavity air inlet first electromagnetic valve is connected with the III port of the small negative pressure air cavity air inlet first electromagnetic valve, and the other end of the air outlet hole is communicated with the small negative pressure air cavity;

one end of the air inlet hole of the second air inlet electromagnetic valve of the small negative pressure air cavity is communicated with the right pump chamber channel, and the other end of the air inlet hole of the second air inlet electromagnetic valve of the small negative pressure air cavity is connected with the II port of the second air inlet electromagnetic valve of the small negative pressure air cavity;

one end of the air outlet hole of the second electromagnetic valve is connected with the III port of the second electromagnetic valve, and the other end of the air outlet hole is communicated with the small negative pressure air cavity;

one end of the air inlet hole of the small negative pressure air cavity air return electromagnetic valve is communicated with the small negative pressure air cavity, and the other end of the air inlet hole is connected with the II port of the small negative pressure air cavity air return electromagnetic valve;

one end of the air outlet hole of the small negative pressure air cavity air return electromagnetic valve is connected with the III port of the small negative pressure air cavity air return electromagnetic valve, and the other end of the air outlet hole is communicated with the air return channel;

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 are mutually independent, and the cover body forms sealing closure for 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 respectively;

The gas cylinder also comprises a large positive pressure air cavity air inlet electromagnetic valve, a plurality of liquid path control electromagnetic valves, a large negative pressure air cavity air return electromagnetic valve, a small positive pressure air cavity air inlet electromagnetic valve, a small positive pressure air cavity air outlet first electromagnetic valve, a small positive pressure air cavity air outlet second electromagnetic valve, a small negative pressure air cavity air inlet first electromagnetic valve, a small negative pressure air cavity air inlet second electromagnetic valve and a small negative pressure air cavity air return electromagnetic valve, and the gas cylinder also comprises a circuit board arranged on the cylinder body, wherein the circuit board is provided with a controller which is respectively connected with each electromagnetic valve and a gas pump so as to control each electromagnetic valve and the gas pump.

13. The peritoneal dialysis machine of claim 12, wherein the gas cylinder is further provided with:

one end of the air inlet hole of the high-pressure cavity air inlet electromagnetic valve is communicated with the air inlet channel, and the other end of the air inlet hole is communicated with the I port of the high-pressure cavity air inlet electromagnetic valve;

one end of the air outlet hole of the high-pressure cavity air inlet electromagnetic valve is communicated with the II port of the high-pressure cavity air inlet electromagnetic valve, and the other end of the air outlet hole is communicated with the high-pressure cavity;

one end of the air inlet hole of the first air outlet electromagnetic valve of the high-pressure cavity is communicated with the high-pressure cavity, and the other end of the air inlet hole is communicated with the I port of the first air outlet electromagnetic valve of the high-pressure cavity;

one end of the air outlet hole of the high-pressure cavity air outlet first electromagnetic valve is communicated with the II port of the high-pressure cavity air outlet first electromagnetic valve, and the other end of the air outlet hole is communicated with the left pump chamber channel;

One end of the air inlet hole of the high-pressure cavity air outlet second electromagnetic valve is communicated with the high-pressure cavity, and the other end of the air inlet hole is communicated with the I port of the high-pressure cavity air outlet second electromagnetic valve;

one end of the air outlet hole of the high-pressure cavity air outlet second electromagnetic valve is communicated with the II port of the high-pressure cavity air outlet second electromagnetic valve, and the other end of the air outlet hole is communicated with the right pump chamber channel;

the gas cylinder further comprises a high-pressure cavity gas inlet electromagnetic valve, a high-pressure cavity gas outlet first electromagnetic valve and a high-pressure cavity gas outlet second electromagnetic valve, and the high-pressure cavity gas inlet electromagnetic valve, the high-pressure cavity gas outlet first electromagnetic valve and the high-pressure cavity gas outlet second electromagnetic valve are respectively connected with the circuit board.

14. The peritoneal dialysis machine of claim 12, wherein the gas cylinder is further provided with air inlet holes of two air bag solenoid valves, one end of each air bag solenoid valve is communicated with the air inlet channel, the other end of each air bag solenoid valve is communicated with an I port of the air bag solenoid valve, the gas cylinder further comprises two air bag solenoid valves, and the two air bag solenoid valves are respectively connected with the circuit board.

15. The peritoneal dialysis machine of claim 12, wherein the gas cylinder is further provided with:

one end of the air outlet hole of the air inlet electromagnetic valve of the air inlet channel is communicated with the air return channel, and the other end of the air outlet hole is communicated with the III port of the air inlet electromagnetic valve of the air inlet channel;

One end of the air inlet hole of the air inlet channel air outlet electromagnetic valve is communicated with the air inlet channel, and the other end of the air inlet hole is communicated with the I port of the air inlet channel air outlet electromagnetic valve;

the gas cylinder further comprises the air inlet electromagnetic valve of the air inlet channel and the air outlet electromagnetic valve of the air inlet channel, the air inlet electromagnetic valve of the air inlet channel and the air outlet electromagnetic valve of the air inlet channel are respectively connected with the circuit board, the II port of the air inlet electromagnetic valve of the air inlet channel is communicated with the atmosphere, and the II port of the air outlet electromagnetic valve of the air inlet channel is communicated with the atmosphere.

16. The peritoneal dialysis machine of claim 12, wherein the gas cylinder is further provided with:

one end of the air inlet hole of the left pump chamber atmospheric electromagnetic valve is communicated with the left pump chamber channel, and the other end of the air inlet hole is communicated with the II port of the left pump chamber atmospheric electromagnetic valve;

one end of the air inlet hole of the right pump chamber atmospheric electromagnetic valve is communicated with the right pump chamber channel, and the other end of the air inlet hole is communicated with the II port of the right pump chamber atmospheric electromagnetic valve;

the gas cylinder also comprises a left pump chamber atmospheric electromagnetic valve and a right pump chamber atmospheric electromagnetic valve, wherein an I port of the left pump chamber atmospheric electromagnetic valve is communicated with the atmosphere, an I port of the right pump chamber atmospheric electromagnetic valve is communicated with the atmosphere, and the left pump chamber atmospheric electromagnetic valve and the right pump chamber atmospheric electromagnetic valve are respectively connected with the circuit board.

17. The peritoneal dialysis machine of claim 12, wherein the air pressures in the large positive pressure air chamber, the small positive pressure air chamber and the high pressure air chamber are all controlled to be within the range of 0mbar to +500mbar, and the air pressures in the large negative pressure air chamber and the small negative pressure air chamber are all controlled to be within the range of-500 mbar to 0mbar.

18. The peritoneal dialysis machine of claim 12, wherein the air pressure within the air bladder is controlled between 0mbar and +1000mbar.

19. The peritoneal dialysis machine of claim 12, wherein the air pressure in the left and right pumping chamber channels is controlled to be between-500 mbar and +500mbar.

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