Gas cylinder, gas power device and peritoneal dialysis machine for peritoneal dialysis machine

Abstract

The present invention relates to a gas cylinder, a gas power device and a peritoneal dialysis machine for a peritoneal dialysis machine. The gas cylinder includes a cylinder body and a cover body. The cylinder body is provided with: an air inlet channel, a large positive pressure air chamber, a large positive air pressure channel, air inlets of a plurality of liquid path control solenoid valves, air outlets of a plurality of liquid path control solenoid valves, a large negative pressure air chamber, a gas return channel, a small positive pressure air chamber, a left pump chamber channel, a right pump chamber channel, and a small negative pressure air chamber. 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. The cover body forms a sealed enclosure 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 respectively. The gas cylinder, the gas power device and the peritoneal dialysis machine for a peritoneal dialysis machine according to the present invention can overcome the disadvantages that the existing manifold has a complex structure and the connection between the gas cylinder and the manifold through an air pipe results in a high risk of air leakage.

Description

Technical Field

[0001] The present invention relates to the field of peritoneal dialysis, and particularly to a gas cylinder, a gas power device and a peritoneal dialysis machine for a peritoneal dialysis machine. Background Art

[0002] Automated peritoneal dialysis is an important means of renal replacement therapy, and has been increasingly concerned 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 instrument is the core device or equipment for realizing automated peritoneal dialysis treatment. At present, peritoneal dialysis instruments can be divided into pressure control type, gravity control type and hybrid control type according to the power sources of infusion and drainage. The currently commonly used clinical models are pressure control type. In the existing pressure control type or hybrid control type peritoneal dialysis instruments, the solenoid valve group and the gas cylinder are separated, that is, the gas in the gas cylinder enters an independent manifold. There is a complex gas path structure in the manifold, and the solenoid valve group is installed on the manifold. After the gas path of the manifold, the gas cylinder passes through each solenoid valve to control the on-off of each liquid path of peritoneal dialysis, so that the peritoneal dialysis instrument operates. The processing of the manifold is very complex, which results in the high cost of the solenoid valve group. In addition, since the manifold is separated from the gas cylinder, joints and air pipes are required to connect the manifold and the gas cylinder, which increases the gas path joints and air pipes. This not only increases the processing cost, but also increases the risk of gas path leakage. Summary of the Invention

[0003] The present invention provides a gas cylinder for a peritoneal dialysis machine, which can overcome the disadvantages that the existing manifold has a complex structure and the connection between the gas cylinder and the manifold through an air pipe leads to a large risk of air leakage.

[0004] The gas cylinder for a peritoneal dialysis machine of the present invention includes a cylinder body and a cover body, and the cylinder body is provided with:

[0005] An air inlet channel for communicating with the positive pressure end of an air pump;

[0006] A large positive pressure gas chamber;

[0007] An air inlet hole of a large positive pressure gas chamber inlet solenoid valve, one end of which is connected to the air inlet channel, and the other end is used for connecting to the port I of the large positive pressure gas chamber inlet solenoid valve;

[0008] An air outlet hole of the large positive pressure gas chamber inlet solenoid valve, one end of which is used for connecting to the port II of the large positive pressure gas chamber inlet solenoid valve, and the other end is connected to the large positive pressure gas chamber;

[0009] A large positive pressure gas channel communicating with the large positive pressure gas chamber;

[0010] Air inlet holes of a plurality of liquid path control solenoid valves, one ends of the air inlet holes of the plurality of liquid path control solenoid valves are respectively communicated with the large positive pressure gas channel, and the other ends are used for connecting to the port I of the plurality of liquid path control solenoid valves in one-to-one correspondence;

[0011] A large negative air pressure channel, connected to the port III of multiple said liquid path control solenoid valves;

[0012] The air outlet holes of multiple liquid path control solenoid valves, one ends of the air outlet holes of multiple liquid path control solenoid valves are respectively communicated with the large negative air pressure channel, and the other ends are used to be correspondingly connected to the port III of multiple liquid path control solenoid valves;

[0013] A large negative air pressure cavity, communicated with the large negative air pressure channel;

[0014] A return air channel, one end is used to be communicated with the negative pressure end of an air pump;

[0015] The air inlet hole of a large negative air pressure cavity return air solenoid valve, one end is communicated with the large negative air pressure cavity, and the other end is used to be connected to the port II of the large negative air pressure cavity return air solenoid valve;

[0016] The air outlet hole of a large negative air pressure cavity return air solenoid valve, one end is used to be connected to the port III of the large negative air pressure cavity return air solenoid valve, and the other end is communicated with the return air channel;

[0017] A small positive air pressure cavity;

[0018] The air inlet hole of a small positive air pressure cavity inlet solenoid valve, one end is connected to the inlet channel, and the other end is used to be connected to the port I of the small positive air pressure cavity inlet solenoid valve;

[0019] The air outlet hole of a small positive air pressure cavity inlet solenoid valve, one end is used to be connected to the port II of the small positive air pressure cavity inlet solenoid valve, and the other end is connected to the small positive air pressure cavity;

[0020] A left pump chamber channel, used to be communicated with the actuator of the membrane of the left pump chamber that drives a liquid pump;

[0021] A right pump chamber channel, used to be communicated with the actuator of the membrane of the right pump chamber that drives a liquid pump;

[0022] The air inlet hole of a small positive air pressure cavity outlet first solenoid valve, one end is connected to the small positive air pressure cavity, and the other end is used to be connected to the port I of the small positive air pressure cavity outlet first solenoid valve;

[0023] The air outlet hole of a small positive air pressure cavity outlet first solenoid valve, one end is used to be connected to the port II of the small positive air pressure cavity outlet first solenoid valve, and the other end is communicated with the left pump chamber channel;

[0024] The air inlet hole of a small positive air pressure cavity outlet second solenoid valve, one end is connected to the small positive air pressure cavity, and the other end is used to be connected to the port I of the small positive air pressure cavity outlet second solenoid valve;

[0025] The air outlet hole of a small positive air pressure cavity outlet second solenoid valve, one end is used to be connected to the port II of the small positive air pressure cavity outlet second solenoid valve, and the other end is communicated with the right pump chamber channel;

[0026] Small negative pressure air cavity;

[0027] The air inlet hole of the first solenoid valve for the small negative pressure air cavity is connected to the left pump chamber passage at one end and is used to connect to the port II of the first solenoid valve for the small negative pressure air cavity at the other end;

[0028] The air outlet hole of the first solenoid valve for the small negative pressure air cavity is used to connect to the port III of the first solenoid valve for the small negative pressure air cavity at one end and is connected to the small negative pressure air cavity at the other end;

[0029] The air inlet hole of the second solenoid valve for the small negative pressure air cavity is connected to the right pump chamber passage at one end and is used to connect to the port II of the second solenoid valve for the small negative pressure air cavity at the other end;

[0030] The air outlet hole of the second solenoid valve for the small negative pressure air cavity is used to connect to the port III of the second solenoid valve for the small negative pressure air cavity at one end and is connected to the small negative pressure air cavity at the other end;

[0031] The air inlet hole of the solenoid valve for the small negative pressure air cavity to return air is connected to the small negative pressure air cavity at one end and is used to connect to the port II of the solenoid valve for the small negative pressure air cavity to return air at the other end;

[0032] The air outlet hole of the solenoid valve for the small negative pressure air cavity to return air is used to connect to the port III of the solenoid valve for the small negative pressure air cavity to return air at one end and is connected to the return air passage at the other end;

[0033] 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 independent of each other, and the cover forms a sealed enclosure 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.

[0034] Preferably, the gas cylinder further includes the large positive pressure air cavity inlet solenoid valve, a plurality of liquid path control solenoid valves, the large negative pressure air cavity return solenoid valve, the small positive pressure air cavity inlet solenoid valve, the first small positive pressure air cavity outlet solenoid valve, the second small positive pressure air cavity outlet solenoid valve, the first small negative pressure air cavity inlet solenoid valve, the second small negative pressure air cavity inlet solenoid valve and the small negative pressure air cavity return solenoid valve. The gas cylinder further includes a circuit board provided on the cylinder body, and the circuit board is provided with a controller that is respectively connected to each solenoid valve and the air pump to control each solenoid valve and the air pump.

[0035] Preferably, the gas cylinder further has:

[0036] The air inlet hole of the high-pressure cavity inlet solenoid valve is communicated with the air inlet passage at one end and is used to communicate with the port I of the high-pressure cavity inlet solenoid valve at the other end;

[0037] The air outlet hole of the high-pressure cavity inlet solenoid valve is used to communicate with the port II of the high-pressure cavity inlet solenoid valve at one end and is connected to the high-pressure cavity at the other end;

[0038] The intake hole of the first high-pressure chamber outlet solenoid valve is connected to the high-pressure chamber at one end and is used to be connected to the port I of the first high-pressure chamber outlet solenoid valve at the other end;

[0039] The outlet hole of the first high-pressure chamber outlet solenoid valve is used to be connected to the port II of the first high-pressure chamber outlet solenoid valve at one end and is connected to the left pump chamber passage at the other end;

[0040] The intake hole of the second high-pressure chamber outlet solenoid valve is connected to the high-pressure chamber at one end and is used to be connected to the port I of the second high-pressure chamber outlet solenoid valve at the other end;

[0041] The outlet hole of the second high-pressure chamber outlet solenoid valve is used to be connected to the port II of the second high-pressure chamber outlet solenoid valve at one end and is connected to the right pump chamber passage at the other end.

[0042] The gas cylinder further includes the high-pressure chamber intake solenoid valve, the first high-pressure chamber outlet solenoid valve and the second high-pressure chamber outlet solenoid valve, and the high-pressure chamber intake solenoid valve, the first high-pressure chamber outlet solenoid valve and the second high-pressure chamber outlet solenoid valve are respectively connected to the circuit board.

[0043] Preferably, the gas cylinder is further provided with intake holes for two airbag solenoid valves. One end of each intake hole of the airbag solenoid valve is connected to the intake passage, and the other end is used to be connected to the port I 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.

[0044] Preferably, the gas cylinder is further provided with:

[0045] The outlet hole of the intake passage intake solenoid valve is communicated with the return air passage at one end and is used to be connected to the port III of the intake passage intake solenoid valve at the other end;

[0046] The intake hole of the intake passage outlet solenoid valve is communicated with the intake passage at one end and is used to be connected to the port I of the intake passage outlet solenoid valve at the other end.

[0047] The gas cylinder further includes the intake passage intake solenoid valve and the intake passage outlet solenoid valve. The intake passage intake solenoid valve and the intake passage outlet solenoid valve are respectively connected to the circuit board. The port II of the intake passage intake solenoid valve is communicated with the atmosphere, and the port II of the intake passage outlet solenoid valve is communicated with the atmosphere.

[0048] Preferably, the gas cylinder is further provided with:

[0049] The intake hole of the left pump chamber atmosphere solenoid valve is used to be communicated with the left pump chamber passage at one end and is used to be communicated with the port II of the left pump chamber atmosphere solenoid valve at the other end;

[0050] The air inlet hole of the right pump chamber atmosphere solenoid valve is used at one end to communicate with the right pump chamber passage and at the other end to communicate with port II of the right pump chamber atmosphere solenoid valve.

[0051] The gas cylinder further includes the left pump chamber atmosphere solenoid valve and the right pump chamber atmosphere solenoid valve. Port I of the left pump chamber atmosphere solenoid valve communicates with the atmosphere, port I of the right pump chamber atmosphere solenoid valve communicates with the atmosphere, and the left pump chamber atmosphere solenoid valve and the right pump chamber atmosphere solenoid valve are respectively connected to the circuit board.

[0052] Preferably, the large negative pressure air chamber, the large positive pressure air chamber, the small positive pressure air chamber, and the small negative pressure air chamber are arranged in parallel and in sequence. At least one reinforcing rib is arranged in each of the large negative pressure air chamber, the large positive pressure air chamber, the small positive pressure air chamber, and the small negative pressure air chamber. The reinforcing rib is perpendicular to the length direction of each air chamber, with one end connected to one inner wall of each air chamber and the other end connected to the inner wall on the opposite side of each air chamber.

[0053] Preferably, the number of the liquid path control solenoid valves is 10.

[0054] The present invention further provides a gas power device, including an air pump and the gas cylinder described above. The positive pressure end of the air pump is communicated with the air inlet passage of the gas cylinder, and the negative pressure end of the air pump is communicated with the air return passage of the gas cylinder.

[0055] The present invention further provides a peritoneal dialysis machine, which includes a liquid path device and the gas power device described in claim 14. The gas power device controls the opening and closing of the channels of each liquid path of the liquid path device.

[0056] The present invention has the following beneficial effects compared with the prior art:

[0057] For the gas cylinder of the peritoneal dialysis machine of the present invention, 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 all arranged on the gas cylinder, and each channel and the air inlet and outlet holes for connecting and installing each solenoid are processed on the gas cylinder. Thus, the solenoid valve can be directly installed on the gas cylinder without a manifold plate, realizing the functions of the existing gas cylinder and manifold plate, making the structure more concise and compact, occupying a smaller volume, and not requiring an air pipe to be arranged between the gas cylinder and the manifold plate, thereby reducing the probability of gas leakage.

[0058] For the gas cylinder of the peritoneal dialysis machine of the present invention, the large positive pressure air chamber, the large negative pressure air chamber, the small positive pressure air chamber, the small negative pressure air chamber, all the solenoid valves, and the circuit board are integrated into one module, reducing the manifold plate and the cost increase caused by the separation of the gas cylinder and the solenoid valve in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a schematic structural diagram of the gas cylinder for a peritoneal dialysis machine according to an embodiment of the present invention;

[0060] Figure 2 Schematic structural diagram of a gas cylinder for a peritoneal dialysis machine and each solenoid valve installed on the gas cylinder according to an embodiment of the present invention;

[0061] Figure 3 Schematic structural diagram of each solenoid valve of a gas cylinder for a peritoneal dialysis machine according to an embodiment of the present invention;

[0062] Figure 4 Schematic perspective structural diagram of the cylinder body of a gas cylinder for a peritoneal dialysis machine according to an embodiment of the present invention. The cylinder body in this figure is Figure 1 inverted;

[0063] Figure 5 Schematic structural diagram of a gas cylinder for a peritoneal dialysis machine according to an embodiment of the present invention in a top view direction;

[0064] Figure 6 Schematic cross-sectional structural diagram of a gas cylinder for a peritoneal dialysis machine according to an embodiment of the present invention along the Figure 5 L-L line in;

[0065] Figure 7 Schematic cross-sectional structural diagram of a gas cylinder for a peritoneal dialysis machine according to an embodiment of the present invention along the Figure 5 H-H line in;

[0066] Figure 8 Schematic cross-sectional structural diagram of a gas cylinder for a peritoneal dialysis machine according to an embodiment of the present invention along the Figure 5 I-I line in;

[0067] Figure 9 Schematic cross-sectional structural diagram of a gas cylinder for a peritoneal dialysis machine according to an embodiment of the present invention along the Figure 5 J-J line in;

[0068] Figure 10 Schematic cross-sectional structural diagram of a gas cylinder for a peritoneal dialysis machine according to an embodiment of the present invention along the Figure 5 K-K line in;

[0069] Figure 11 Schematic diagram of the gas path principle of a gas cylinder for a peritoneal dialysis machine according to an embodiment of the present invention.

[0070] Accompanying drawings

[0071] A Cylinder body, A1 First pump connection hole, A2 First pump connection, A3 Second pump connection hole, A4 Second pump connection, A5 Reinforcing rib, A6 Ferrule joint, A7 Air filter column, A8 Mounting projection, A9 Pressure measurement through hole, A10 Atmosphere through hole, A11 Load hole, A12 Raised column;

[0072] B Cover body;

[0073] C gasket;

[0074] D circuit board;

[0075] 11 large positive pressure air chambers, 12 large negative pressure air chambers, 13 small positive pressure air chambers, 14 small negative pressure air chambers,

[0076] 15 intake channels, 16 return air channels, 17 large positive pressure air channels, 18 large negative pressure air channels, 19 left pump chamber channels, 1a right pump chamber channels;

[0077] 21 large negative pressure air chamber return air solenoid valve,

[0078] 22 intake channel intake solenoid valve,

[0079] 23 intake channel outlet solenoid valve,

[0080] 24 large positive pressure air chamber intake solenoid valve,

[0081] 25, 26 airbag solenoid valves,

[0082] 27 high-pressure chamber intake solenoid valve,

[0083] 28 small negative pressure air chamber return air solenoid valve,

[0084] 29 small positive pressure air chamber intake solenoid valve,

[0085] 210 high-pressure chamber outlet first solenoid valve,

[0086] 211 small positive pressure air chamber outlet first solenoid valve,

[0087] 212 left pump chamber atmosphere solenoid valve,

[0088] 213 small negative pressure air chamber intake first solenoid valve,

[0089] 214 small negative pressure air chamber intake second solenoid valve,

[0090] 215 right pump chamber atmosphere solenoid valve,

[0091] 216 small positive pressure air chamber outlet second solenoid valve,

[0092] 217 high-pressure chamber outlet second solenoid valve,

[0093] 218 - 227 liquid path control solenoid valves,

[0094] K21 outlet hole of the large negative pressure air chamber return air solenoid valve,

[0095] K22 outlet hole of the intake channel intake solenoid valve,

[0096] K23 intake hole of the intake channel outlet solenoid valve,

[0097] The air inlet hole of the air inlet electromagnetic valve of the large positive pressure air chamber of K24

[0098] The air inlet holes of the air inlet electromagnetic valves of the air bags of K25 and K26

[0099] The air inlet hole of the air inlet electromagnetic valve of the high-pressure chamber of K27

[0100] The air outlet hole of the air return electromagnetic valve of the small negative pressure air chamber of K28

[0101] The air inlet hole of the air inlet electromagnetic valve of the small positive pressure air chamber of K29I

[0102] The air outlet hole of the air inlet electromagnetic valve of the small positive pressure air chamber of K29II

[0103] The air inlet hole of the first air outlet electromagnetic valve of the small positive pressure air chamber of K211I

[0104] The air outlet hole of the first air outlet electromagnetic valve of the small positive pressure air chamber of K211II

[0105] The air inlet hole of the second air outlet electromagnetic valve of the small positive pressure air chamber of K216I

[0106] The air outlet hole of the second air outlet electromagnetic valve of the small positive pressure air chamber of K216II

[0107] The air inlet holes of the liquid path control electromagnetic valves of K218I-K227I

[0108] The air outlet holes of the liquid path control electromagnetic valves of K218III-K227III

[0109] The present invention provides a gas cylinder for a peritoneal dialysis machine, which is used to direct the airflow generated by an air pump, as Figure 1 and Figure 2 shown. The gas cylinder includes a cylinder body A and a cover body B. As Figure 4 shown, the cylinder body A is provided with an independent 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. The cover body B forms a seal for 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 respectively. In this embodiment, as Figure 2 shown, a sealing gasket C is provided between the cover body B and the cylinder body A, so that a seal is formed between the respective air chambers. In this embodiment, a silica gel sealing gasket is used, which has good sealing performance and is not easy to age, so that the gas cylinder has a longer service life. The outer wall of the cylinder body A is provided with an installation protrusion A8, and the installation protrusion A8 is provided with an installation through hole, and a bolt can be passed through the installation through hole and then fixed to a fixing frame or other support. When the cover body B is fixed to the cylinder 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 Figure 1As shown in the figure, multiple solenoid valve holes are provided on the top wall of the gas cylinder for installing multiple solenoid valves. The connection relationships and functions of each solenoid valve with the solenoid valve holes will be introduced one by one below. All the solenoid valves used in this embodiment are as follows Figure 3 shown, which are two-way three-way valves, having port I, port II, and port III, and all the valves are normally closed valves.

[0110] The bottle body A is provided with:

[0111] An air intake passage 15, as shown in Figure 8 the figure, which is used to communicate with the positive pressure end of the air pump and receive the positive pressure air flow generated by the air pump;

[0112] The air intake hole K24 of the large positive pressure air chamber intake solenoid valve, as shown in Figure 8 the figure, one end is connected to the air intake passage 15, and the other end is used to connect to port I of the large positive pressure air chamber intake solenoid valve 24;

[0113] The air outlet hole (not shown in the figure) of the large positive pressure air chamber intake solenoid valve, one end is used to connect to port II of the large positive pressure air chamber intake solenoid valve 24, and the other end is connected to the large positive pressure air chamber 11;

[0114] Through the air intake passage 15, the air intake hole K24 of the large positive pressure air chamber intake solenoid valve, the air outlet hole of the large positive pressure air chamber intake solenoid valve, and the large positive pressure air chamber intake solenoid valve 24, the air flow entering the large positive pressure air chamber 11 from the air intake passage 15 can be controlled, thereby controlling the pressure in the large positive pressure air chamber 11. The bottle body A is provided with multiple pressure measurement through holes A9. Each pressure measurement through hole A9 is provided with a pagoda joint A6. Each pagoda joint A6 is connected with a trachea (not shown in the figure), and the trachea is connected with a pressure sensor (not shown in the figure). Port II of the air intake hole K24 of the large positive pressure air chamber intake solenoid valve is communicated with one of the pressure measurement through holes A9, so as to detect the air pressure in the large positive pressure air chamber 11. The pressure in the large positive pressure air chamber 11 is generally controlled at about 400 mbar. When the air pressure value in the large positive pressure air chamber 11 is lower than the set lower limit value, port II of the solenoid valve 24 is communicated with port I, and the air intake passage 15 replenishes air to the large positive pressure air chamber 11 until the air pressure reaches the set value.

[0115] The bottle body A is also provided with:

[0116] A large positive pressure air passage 17, as shown in Figure 6 the figure, which is communicated with the large positive pressure air chamber 11;

[0117] The air intake holes K218I-K227I of multiple liquid path control solenoid valves. One ends of the air intake holes K218I-K227I of multiple liquid path control solenoid valves are respectively communicated with the large positive pressure air passage 17, and the other ends are used to be correspondingly connected to port I of multiple liquid path control solenoid valves 218-227;

[0118] Large negative air pressure passage 18;

[0119] The air outlet holes K218Ⅲ - K227Ⅲ of multiple liquid path control solenoid valves, such as Figure 7 shown, one ends of the air outlet holes K218Ⅲ - K227Ⅲ of multiple liquid path control solenoid valves are respectively communicated with the large negative air pressure passage 18, and the other ends are used to be correspondingly connected to the Ⅲ ports of multiple liquid path control solenoid valves 218 - 227, where Figure 10 the air inlet hole K218Ⅰ of the liquid path control solenoid valve 218, the air outlet hole K218Ⅲ of the liquid path control solenoid valve, the control hole K218Ⅱ of the liquid path control solenoid valve and the load hole A11 for communicating the control hole K218Ⅱ with the outside of the gas cylinder are shown;

[0120] The air return passage 16, one end is used to be communicated with the negative pressure end of the air pump;

[0121] The air inlet hole (not shown in the figure) of the large negative air cavity air return solenoid valve, one end is communicated with the large negative air cavity 12, and the other end is used to be connected to the Ⅱ port of the large negative air cavity air return solenoid valve 21;

[0122] The air outlet hole K21 of the large negative air cavity air return solenoid valve, as Figure 9 shown, one end is used to be connected to the Ⅲ port of the large negative air cavity air return solenoid valve 21, and the other end is communicated with the air return passage 16;

[0123] Through the above structure, the gas in the large positive air cavity 11 can flow to the large positive air pressure passage 17, and then enter multiple liquid path control solenoid valves 218 - 227. When the Ⅱ port of a certain liquid path control solenoid valve 218 - 227 is communicated with the Ⅰ port, the positive pressure generated by the gas passing through the Ⅱ port of the liquid path control solenoid valve 218 - 227 drives the corresponding component to block the liquid path and make it disconnected. When the Ⅱ port of a certain liquid path control solenoid valve 218 - 227 is communicated with the Ⅲ port, the negative pressure generated by the gas flowing back from the Ⅱ port of the liquid path control solenoid valve 218 - 227 to the Ⅲ port drives the corresponding component away from the liquid path, thereby making the liquid path connected. The pressure of the large negative air cavity 12 is generally controlled at about -400 mbar. One of the Ⅱ port of the air outlet hole K21 of the large negative air cavity air return solenoid valve is communicated with one of the pressure measuring through holes A9, so as to detect the air pressure of the large negative air cavity 12. When the absolute value of the air pressure of the large negative air cavity 12 is lower than the set lower limit value, the Ⅱ port and the Ⅲ port of the solenoid valve 21 are made to be communicated to supplement the pressure of the large negative air cavity to make it recover to the set value, Figure 11 The gas path schematic diagram of the gas cylinder is shown, from Figure 11 it can be seen the guiding of the gas flow direction by each solenoid valve.

[0124] In this embodiment, as Figure 1 and Figure 2As shown, the wall of the bottle body A is provided with a first pump joint hole A1 connecting the intake passage 15 and the positive pressure end of the air pump, and a first pump joint A3 installed in the first pump joint hole A1. The wall of the bottle body A is also provided with a second pump joint hole A3 connecting the air return passage 16 and the negative pressure end of the air pump, and a second pump joint A4 installed in the second pump joint hole A3.

[0125] The gas cylinder is also provided with:

[0126] The intake hole K29I of the small positive pressure air chamber intake solenoid valve, as Figure 10 shown, one end is connected to the intake passage 15, and the other end is for connecting to port I of the small positive pressure air chamber intake solenoid valve 29;

[0127] The outlet hole K29Ⅱ of the small positive pressure air chamber intake solenoid valve, one end is for connecting to port II of the small positive pressure air chamber intake solenoid valve 29, and the other end is connected to the small positive pressure air chamber 13;

[0128] The small positive pressure air chamber intake solenoid valve 29 can be set through the intake hole K29I and the outlet hole of the small positive pressure air chamber intake solenoid valve. The air pressure in the small positive pressure air chamber 13 can be controlled through the small positive pressure air chamber intake solenoid valve 29. The air pressure in the small positive pressure air chamber 13 is generally controlled at about 300 mbar. Port II of the small positive pressure air chamber intake solenoid valve 29 communicates with one of the pressure measurement through holes A9, so as to detect the air pressure in the small negative pressure air chamber 13. When the air pressure value in the small positive pressure air chamber 14 exceeds the set value, the solenoid valve 29 is activated, that is, port I and port II of the solenoid valve 29 are made to communicate, and the intake passage 15 replenishes the pressure of the small positive pressure air chamber 13 to the set air pressure value.

[0129] The bottle body A is also provided with:

[0130] The left pump chamber passage 19, as Figure 10 shown, is used to communicate with a driver (not shown in the figure) that deforms the membrane of the left pump chamber of a driving liquid pump (not shown in the figure), so as to drive the liquid to enter the left pump chamber or discharge from the left pump chamber;

[0131] The right pump chamber passage 1a, as Figure 10 shown, is used to communicate with a driver (not shown in the figure) that deforms the membrane of the right pump chamber of a driving liquid pump (not shown in the figure), so as to drive the liquid to enter the right pump chamber or discharge from the right pump chamber;

[0132] The intake hole K211Ⅰ of the small positive pressure air chamber outlet first solenoid valve, as Figure 10 shown, one end is connected to the small positive pressure air chamber 13, and the other end is for connecting to port I of the small positive pressure air chamber outlet first solenoid;

[0133] The air outlet hole K211Ⅱ of the first electromagnetic valve for the small positive pressure air chamber outlet is used at one end to connect to the Ⅱ port of the first electromagnetic valve for the small positive pressure air chamber outlet, and the other end is connected to the left pump chamber passage 19, as Figure 10 shown;

[0134] The air inlet hole K216I of the second electromagnetic valve for the small positive pressure air chamber outlet, as Figure 10 shown, is connected to the small positive pressure air chamber 13 at one end and is used at the other end to connect to the I port of the second electromagnetic valve 216 for the small positive pressure air chamber outlet;

[0135] The air outlet hole K216Ⅱ of the second electromagnetic valve for the small positive pressure air chamber outlet is used at one end to connect to the Ⅱ port of the second electromagnetic valve for the small positive pressure air chamber outlet, and the other end is connected to the right pump chamber passage 1a, as Figure 10 shown;

[0136] Through the above structure, the first electromagnetic valve 211 for the small positive pressure air chamber outlet and the second electromagnetic valve 216 for the small positive pressure air chamber outlet can be set. When the I port and the Ⅱ port of the first electromagnetic valve 211 for the small positive pressure air chamber outlet are communicated, gas enters the driver that drives the membrane of the left pump chamber to deform, causing the volume of the left pump chamber to become smaller. At this time, the liquid in the left pump chamber is squeezed out. When the I port and the Ⅱ port of the second electromagnetic valve 216 for the small positive pressure air chamber outlet are communicated, gas enters the driver that drives the membrane of the right pump chamber to deform, causing it to squeeze the liquid in the right pump chamber. At this time, the liquid in the right pump chamber is squeezed out. The first electromagnetic valve 211 for the small positive pressure air chamber outlet and the second electromagnetic valve 216 for the small positive pressure air chamber outlet can be controlled so that their I ports and Ⅱ ports are alternately communicated, thereby controlling the liquid in the left pump chamber and the right pump chamber to be alternately squeezed out.

[0137] The bottle body A is also provided with:

[0138] The air inlet hole (not shown in the figure) of the first electromagnetic valve for the small negative pressure air chamber inlet is used at one end to communicate with the driver that drives the membrane of the left pump chamber of the liquid pump, and the other end is used to connect to the Ⅱ port of the first electromagnetic valve 213 for the small negative pressure air chamber inlet;

[0139] The air outlet hole (not shown in the figure) of the first electromagnetic valve for the small negative pressure air chamber inlet is used at one end to connect to the Ⅲ port of the first electromagnetic valve 213 for the small negative pressure air chamber inlet, and the other end is connected to the small negative pressure air chamber 14;

[0140] The air inlet hole (not shown in the figure) of the second electromagnetic valve for the small negative pressure air chamber inlet is used at one end to communicate with the driver that drives the membrane of the right pump chamber of the liquid pump, and the other end is used to connect to the Ⅱ port of the second electromagnetic valve 214 for the small negative pressure air chamber inlet;

[0141] The air outlet hole (not shown in the figure) of the second electromagnetic valve for the small negative pressure air chamber inlet is used at one end to connect to the Ⅲ port of the second electromagnetic valve 214 for the small negative pressure air chamber inlet, and the other end is connected to the small negative pressure air chamber 14;

[0142] The intake hole of the small negative pressure air chamber return air solenoid valve (not shown in the figure) is connected to the small negative pressure air chamber 14 at one end and is used to connect to port II of the small negative pressure air chamber return air solenoid valve 28 at the other end;

[0143] The air outlet hole K28 of the small negative pressure air chamber return air solenoid valve, as Figure 9 shown, is used to connect to port III of the small negative pressure air chamber return air solenoid valve 28 at one end and is connected to the return air passage 16 at the other end.

[0144] Through the above structure, the first solenoid valve 213 for intake of the small negative pressure air chamber, the second solenoid valve 214 for intake of the small negative pressure air chamber, and the small negative pressure air chamber return air solenoid valve 28 can be set. The gas in the left pump chamber can enter the small negative pressure air chamber 14 through the first solenoid valve 213 for intake of the small negative pressure air chamber. At this time, the membrane in the left pump chamber deforms under the action of negative pressure, making the volume of the left pump chamber cavity larger and sucking in the liquid. The gas in the right pump chamber can enter the small negative pressure air chamber 14 through the second solenoid valve 214 for intake of the small negative pressure air chamber. At this time, the membrane in the right pump chamber deforms under the action of negative pressure, making the volume of the right pump chamber cavity larger. At this time, the right pump chamber sucks in the liquid. By controlling these two solenoid valves 213 and 214, the III ports and II ports of the two are made to communicate alternately, so that the gas in the left pump chamber and the right pump chamber can alternately enter the small negative pressure air chamber 14, thereby alternately discharging the liquid. The air pressure in the small negative pressure air chamber 14 is generally controlled at about -300 mbar. Port II of the small negative pressure air chamber return air solenoid valve 28 communicates with one of the pressure measurement through holes A9, so that the air pressure in the small negative pressure air chamber 14 can be detected. When the air pressure value in the small negative pressure air chamber 13 is lower than the set lower limit value, the solenoid valve 28 is started to make its III port and II port communicate, so that the air pressure value in the small negative pressure air chamber 13 is restored to the set air pressure value.

[0145] The gas cylinder for the peritoneal dialysis machine of the present invention 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 on the gas cylinder, so that the solenoid valve can be directly installed on the gas cylinder, eliminating the need for a manifold. The functions of the existing gas cylinder and manifold can be achieved, making the structure more simple and compact, occupying less volume, and also eliminating the need to set an air pipe between the gas cylinder and the manifold, thereby reducing the probability of gas leakage. The cylinder body can be integrally formed, such as by die-casting or casting, and then each channel and the intake and outlet holes for connecting and installing each solenoid are machined on the cylinder body, making the machining simpler, reducing the machining difficulty and the amount of machining.

[0146] As Figure 4As shown, the large negative-pressure air chamber 12, large positive-pressure air chamber 11, small positive-pressure air chamber 13, and small negative-pressure air chamber 14 are arranged in parallel and in sequence. At least one reinforcing rib A5 is provided in each of the large negative-pressure air chamber 12, large positive-pressure air chamber 11, small positive-pressure air chamber 13, and small negative-pressure air chamber 14. The reinforcing rib A5 is perpendicular to the length direction of each air chamber. One end of the reinforcing rib A5 is connected to one inner wall of each air chamber, and the other end is connected to the inner wall on the opposite side of each air chamber. The reinforcing rib A5 can strengthen the structure of the rectangular air chamber, prevent the walls of each air chamber from deforming, and thus make the structure of the gas cylinder more stable.

[0147] As Figure 2 The gas cylinder further includes the large positive-pressure air chamber intake electromagnetic valve 24, a plurality of liquid path control electromagnetic valves 218 - 227, the large negative-pressure air chamber return electromagnetic valve 21, the small positive-pressure air chamber intake electromagnetic valve 29, the small positive-pressure air chamber outlet first electromagnetic valve 211, the small positive-pressure air chamber outlet second electromagnetic valve 216, the small negative-pressure air chamber intake first electromagnetic valve 213, the small negative-pressure air chamber intake second electromagnetic valve 214, and the small negative-pressure air chamber return electromagnetic valve 28. The gas cylinder further includes a circuit board D provided on the cylinder body A. The circuit board D is provided with a controller (not shown in the figure) that is respectively connected to all the electromagnetic valves and air pumps in the present invention to control each electromagnetic valve and air pump. In the present invention, all the pressure sensors are connected to the controller to set the working parameters of the air pump and the pressure values of each cavity for the controller. When the data transmitted by the pressure sensors is lower than the set value, the corresponding electromagnetic valves are controlled to supply air to the corresponding cavity to restore the internal air pressure to the set value.

[0148] The gas cylinder for the peritoneal dialysis machine of the present invention integrates the large positive-pressure air chamber 11, large negative-pressure air chamber 12, small positive-pressure air chamber 13, small negative-pressure air chamber 14, all the electromagnetic valves, and the circuit board D into a module, achieving a high degree of integration, a more compact structure, reducing the manifold plate, and reducing the cost increase caused by the separation of the gas cylinder and the electromagnetic valves in the prior art. In addition, when maintenance is required, the entire gas cylinder can be replaced, improving the maintenance speed and efficiency.

[0149] As Figure 1 and Figure 2 As shown, a plurality of protruding columns A12 are provided on the outer wall of the top wall of the cylinder body. Both the protruding columns A12 and the circuit board D are provided with mounting holes. The circuit board D is mounted on the gas cylinder by passing screws through the mounting holes of the protruding columns A12 and the mounting holes of the circuit board D. In this way, the circuit board can be quickly positioned and installed. In this embodiment, the number of the liquid path control electromagnetic valves 218 - 227 is 10. Of course, the number of the liquid path control electromagnetic valves 218 - 227 can also be set according to actual needs.

[0150] The gas cylinder further has:

[0151] The intake hole K27 of the high-pressure chamber intake electromagnetic valve, asFigure 8 As shown, one end communicates with the intake passage 15, and the other end is used to communicate with the port I of the high-pressure chamber intake solenoid valve 27;

[0152] The air outlet hole of the high-pressure chamber intake solenoid valve (not shown in the figure), one end is used to communicate with the port II of the high-pressure chamber intake solenoid valve 27, and the other end communicates with the high-pressure chamber;

[0153] The intake hole of the high-pressure chamber outlet first solenoid valve (not shown in the figure), one end communicates with the high-pressure chamber, and the other end is used to communicate with the port I of the high-pressure chamber outlet first solenoid valve 210;

[0154] The air outlet hole of the high-pressure chamber outlet first solenoid valve (not shown in the figure), one end is used to communicate with the port II of the high-pressure chamber outlet first solenoid valve 210, and the other end communicates with the left pump chamber passage 19;

[0155] The intake hole of the high-pressure chamber outlet second solenoid valve (not shown in the figure), one end communicates with the high-pressure chamber, and the other end is used to communicate with the port I of the high-pressure chamber outlet first solenoid valve 210;

[0156] The air outlet hole of the high-pressure chamber outlet second solenoid valve (not shown in the figure), one end is used to communicate with the port II of the high-pressure chamber outlet second solenoid valve 217, and the other end communicates with the right pump chamber passage 1a.

[0157] The gas cylinder further includes the high-pressure chamber intake solenoid valve 27, the high-pressure chamber outlet first solenoid valve 210, and the high-pressure chamber outlet second solenoid valve 217. The high-pressure chamber intake solenoid valve 27, the high-pressure chamber outlet first solenoid valve 210, and the high-pressure chamber outlet second solenoid valve 217 are respectively connected to the circuit board D. In this embodiment, the gas cylinder further includes a high-pressure chamber module (not shown in the figure). The high-pressure chamber module includes a high-pressure chamber. The pressure range of the high-pressure chamber is about 350 mbar. One of the ports II of the high-pressure chamber intake solenoid valve 27 communicates with one of the pressure measurement through holes A9, so that the air pressure in 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 a high-pressure chamber inlet pipe (not shown in the figure), and the high-pressure chamber is respectively connected to the port I of the high-pressure chamber outlet first solenoid valve 210 and the port I of the high-pressure chamber outlet second solenoid valve through a high-pressure chamber outlet pipe (not shown in the figure). Pressure sensors (not shown in the figure) are provided in the left pump chamber passage 19 and the right pump chamber passage 1a to detect the pressure in the left pump chamber passage and the right pump chamber passage, record their pressure and pressure change values, and calculate the volume of the liquid pumped out by the left pump chamber and the right pump chamber according to the gas law.

[0158] The gas cylinder is also provided with intake holes K25, K26 for two airbag solenoid valves 25, 26, as Figure 8As shown, one end of the air inlet holes K25 and K26 of each airbag solenoid valve is communicated with the air inlet passage 15, and the other end is used to be communicated with the I port of the airbag solenoid valves 25 and 26. As Figure 11 As shown, the gas cylinder further includes two such airbag solenoid valves 25 and 26. In this embodiment, the gas cylinder further includes two airbags (not shown in the figure), and the two airbags are communicated with the II ports of the two airbag solenoid valves 25 and 26 in a one-to-one correspondence. One of the airbags is inflated and can be used to push an extrusion member, and the extrusion member can extrude the membrane of the liquid cartridge of the peritoneal dialysis machine so that the membrane is in sealed contact with the structure in the cartridge, thereby forming a plurality of independent and sealed passages and cavities in the cartridge. The other airbag can be deflated when a failure occurs in the peritoneal dialysis machine to push another extrusion member to extrude all the liquid pipelines so that the liquid passage is cut off, and the liquid in all the liquid pipelines cannot flow, thereby preventing the liquid from continuing to flow and causing harm to the human body. The II ports of the two airbag solenoid valves 25 and 26 are respectively communicated with two of the pressure measurement through holes A9, so that the air pressures of the two airbags can be respectively detected. When the air pressure is lower than the set value, the solenoid valve 25 or 26 is started to make its I port and II port communicate, and the airbag is filled with air through the air inlet passage 15 to the set value.

[0159] The gas cylinder is further provided with:

[0160] The air outlet hole K22 of the air inlet passage air inlet solenoid valve, as Figure 9 shown, one end is communicated with the air return passage 16, and the other end is used to be communicated with the III port of the air inlet passage air inlet solenoid valve 22;

[0161] The air inlet hole K23 of the air inlet passage air outlet solenoid valve, as Figure 8 shown, one end is communicated with the air inlet passage 15, and the other end is used to be communicated with the I port of the air inlet passage air outlet solenoid valve 23.

[0162] The gas cylinder further includes the air inlet passage air inlet solenoid valve 22 and the air inlet passage air outlet solenoid valve 23. The II port of the air inlet passage air inlet solenoid valve 22 is communicated with the atmosphere, and the II port of the air inlet passage air outlet solenoid valve 23 is communicated with the atmosphere.

[0163] Through the intake passage intake solenoid valve 22 and the intake passage outlet solenoid valve 23, the intake passage 15 can be communicated with the atmosphere, thereby realizing air supplement from the atmosphere and exhausting air into the atmosphere. The wall of the cylinder A is also provided with an atmosphere through hole A10 communicating with the port II of the intake passage intake solenoid valve 22, and this atmosphere through hole A10 forms an air inlet. The wall of the cylinder A is also provided with an atmosphere through hole A10 communicating with the port II of the intake passage outlet solenoid valve 23, and this atmosphere through hole A10 forms an exhaust port. Air filter columns A7 are provided at both the air inlet and the exhaust port to filter the air entering and exiting the gas cylinder, keeping the gas in the gas path dust-free and clean, reducing the risk of faults such as gas path blockage caused by dust, etc., and at the same time, it can also play a role in reducing working noise.

[0164] The gas cylinder is also provided with:

[0165] The intake hole of the left pump chamber atmosphere solenoid valve (not shown in the figure), one end is communicated with the driver that drives the membrane deformation of the left pump chamber of the liquid pump, and the other end is used to communicate with the port II of the left pump chamber atmosphere solenoid valve 212;

[0166] The intake hole of the right pump chamber atmosphere solenoid valve (not shown in the figure), one end is communicated with the driver that drives the membrane deformation of the right pump chamber of the liquid pump, and the other end is used to communicate with the port II of the right pump chamber atmosphere solenoid valve 215.

[0167] The gas cylinder also includes the left pump chamber atmosphere solenoid valve 212 and the right pump chamber atmosphere solenoid valve 215. The port I of the left pump chamber atmosphere solenoid valve 212 is communicated with the atmosphere, and the port I of the right pump chamber atmosphere solenoid valve 215 is communicated with the atmosphere, which can control the left pump chamber and the right pump chamber to exhaust air into the atmosphere.

[0168] The present invention also provides a gas power device, which includes an air pump (not shown in the figure) and the gas cylinder as described above. The positive pressure end of the air pump is communicated with the intake passage 15 of the gas cylinder, and the negative pressure end of the air pump is communicated with the return air passage 16 of the gas cylinder. The air pump generates an airflow with pressure, and the gas cylinder is used to store the airflow, guide the airflow, and control the further flow direction of the airflow through the solenoid valve.

[0169] The present invention also provides a peritoneal dialysis machine, which includes a liquid path device (not shown in the figure) and the gas power device as described above. The gas power device controls the opening and closing of the channels of each liquid path of the liquid path device.

[0170] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art, within the essence and protection scope of the present invention, any modifications or equivalent replacements made to the present invention also fall within the protection scope of the present invention.

Claims

1. A gas cylinder for a peritoneal dialysis machine, characterized in that, It includes a bottle body and a cap body. The bottle body is provided with: An air inlet passage for communicating with the positive pressure end of an air pump; A large positive pressure air chamber; An air inlet hole of a large positive pressure air chamber inlet solenoid valve, one end of which is connected to the air inlet passage, and the other end is used for connecting to port I of the large positive pressure air chamber inlet solenoid valve; An air outlet hole of a large positive pressure air chamber inlet solenoid valve, one end of which is used for connecting to port II of the large positive pressure air chamber inlet solenoid valve, and the other end is connected to the large positive pressure air chamber; A large positive pressure air passage communicating with the large positive pressure air chamber; Air inlet holes of a plurality of liquid path control solenoid valves. One ends of the air inlet holes of the plurality of liquid path control solenoid valves are respectively communicated with the large positive pressure air passage, and the other ends are used for connecting to port I of the plurality of liquid path control solenoid valves in one-to-one correspondence; A large negative pressure air passage connected to port III of the plurality of liquid path control solenoid valves; Air outlet holes of a plurality of liquid path control solenoid valves. One ends of the air outlet holes of the plurality of liquid path control solenoid valves are respectively communicated with the large negative pressure air passage, and the other ends are used for connecting to port III of the plurality of liquid path control solenoid valves in one-to-one correspondence; A large negative pressure air chamber communicating with the large negative pressure air passage; A return air passage, one end of which is used for communicating with the negative pressure end of the air pump; An air inlet hole of a large negative pressure air chamber return air solenoid valve, one end of which is connected to the large negative pressure air chamber, and the other end is used for connecting to port II of the large negative pressure air chamber return air solenoid valve; An air outlet hole of a large negative pressure air chamber return air solenoid valve, one end of which is used for connecting to port III of the large negative pressure air chamber return air solenoid valve, and the other end communicates with the return air passage; A small positive pressure air chamber; An air inlet hole of a small positive pressure air chamber inlet solenoid valve, one end of which is connected to the air inlet passage, and the other end is used for connecting to port I of the small positive pressure air chamber inlet solenoid valve; An air outlet hole of a small positive pressure air chamber inlet solenoid valve, one end of which is used for connecting to port II of the small positive pressure air chamber inlet solenoid valve, and the other end is connected to the small positive pressure air chamber; A left pump chamber passage for communicating with a driver of a membrane of the left pump chamber for driving a liquid pump; A right pump chamber passage for communicating with a driver of a membrane of the right pump chamber for driving a liquid pump; An air inlet hole of a small positive pressure air chamber outlet first solenoid valve, one end of which is connected to the small positive pressure air chamber, and the other end is used for connecting to port I of the small positive pressure air chamber outlet first solenoid; An air outlet hole of a small positive pressure air chamber outlet first solenoid valve, one end of which is used for connecting to port II of the small positive pressure air chamber outlet first solenoid, and the other end is connected to the left pump chamber passage; An air inlet hole of a small positive pressure air chamber outlet second solenoid valve, one end of which is connected to the small positive pressure air chamber, and the other end is used for connecting to port I of the small positive pressure air chamber outlet second solenoid; An air outlet hole of a small positive pressure air chamber outlet second solenoid valve, one end of which is used for connecting to port II of the small positive pressure air chamber outlet second solenoid, and the other end is connected to the right pump chamber passage; A small negative pressure air chamber; An air inlet hole of a small negative pressure air chamber inlet first solenoid valve, one end of which is connected to the left pump chamber passage, and the other end is used for connecting to port II of the small negative pressure air chamber inlet first solenoid valve; An air outlet hole of a small negative pressure air chamber inlet first solenoid valve, one end of which is used for connecting to port III of the small negative pressure air chamber inlet first solenoid valve, and the other end is connected to the small negative pressure air chamber; An air inlet hole of a small negative pressure air chamber inlet second solenoid valve, one end of which is connected to the right pump chamber passage, and the other end is used for connecting to port II of the small negative pressure air chamber inlet second solenoid valve; The air outlet hole of the second solenoid valve for admitting air into the small negative pressure air chamber is used at one end to connect to port III of the second solenoid valve for admitting air into the small negative pressure air chamber, and at the other end to communicate with the small negative pressure air chamber; The air inlet hole of the solenoid valve for returning air from the small negative pressure air chamber is connected to the small negative pressure air chamber at one end and is used at the other end to connect to port II of the solenoid valve for returning air from the small negative pressure air chamber; The air outlet hole of the solenoid valve for returning air from the small negative pressure air chamber is used at one end to connect to port III of the solenoid valve for returning air from the small negative pressure air chamber, and at the other end to communicate with the air return 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 forms a sealed enclosure 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 respectively; The bottle body is further provided with an air inlet hole of the high-pressure chamber inlet solenoid valve, an air outlet hole of the high-pressure chamber inlet solenoid valve, an air inlet hole of the first high-pressure chamber outlet solenoid valve, an air outlet hole of the first high-pressure chamber outlet solenoid valve, an air inlet hole of the second high-pressure chamber outlet solenoid valve, an air outlet hole of the second high-pressure chamber outlet solenoid valve, and air inlet holes of two airbag solenoid valves.

2. The gas cylinder according to claim 1, characterized in that, The gas cylinder further includes the large positive pressure air chamber inlet solenoid valve, a plurality of liquid path control solenoid valves, the large negative pressure air chamber air return solenoid valve, the small positive pressure air chamber inlet solenoid valve, the first small positive pressure air chamber outlet solenoid valve, the second small positive pressure air chamber outlet solenoid valve, the first small negative pressure air chamber inlet solenoid valve, the second small negative pressure air chamber inlet solenoid valve, and the small negative pressure air chamber air return solenoid valve. The gas cylinder further includes a circuit board provided on the bottle body, and the circuit board is provided with a controller connected to each solenoid valve and the air pump respectively to control each solenoid valve and the air pump.

3. The gas cylinder according to claim 2, wherein: One end of the air inlet hole of the high-pressure chamber inlet solenoid valve communicates with the air inlet passage, and the other end is used to connect to port I of the high-pressure chamber inlet solenoid valve; One end of the air outlet hole of the high-pressure chamber inlet solenoid valve is used to connect to port II of the high-pressure chamber inlet solenoid valve, and the other end communicates with the high-pressure chamber; One end of the air inlet hole of the first high-pressure chamber outlet solenoid valve communicates with the high-pressure chamber, and the other end is used to connect to port I of the first high-pressure chamber outlet solenoid valve; One end of the air outlet hole of the first high-pressure chamber outlet solenoid valve is used to connect to port II of the first high-pressure chamber outlet solenoid valve, and the other end communicates with the left pump chamber passage; One end of the air inlet hole of the second high-pressure chamber outlet solenoid valve communicates with the high-pressure chamber, and the other end is used to connect to port I of the second high-pressure chamber outlet solenoid valve; One end of the air outlet hole of the second high-pressure chamber outlet solenoid valve is used to connect to port II of the second high-pressure chamber outlet solenoid valve, and the other end communicates with the right pump chamber passage.

4. The gas cylinder according to claim 3, characterized in that, The gas cylinder further includes the high-pressure chamber inlet solenoid valve, the first high-pressure chamber outlet solenoid valve, and the second high-pressure chamber outlet solenoid valve, and the high-pressure chamber inlet solenoid valve, the first high-pressure chamber outlet solenoid valve, and the second high-pressure chamber outlet solenoid valve are respectively connected to the circuit board.

5. The gas cylinder according to claim 2, characterized in that, One end of the air inlet hole of each airbag solenoid valve communicates with the air inlet passage, and the other end is used to connect to port I of the airbag solenoid valve.

6. The gas cylinder according to claim 5, wherein, The gas cylinder further includes two airbag solenoid valves, and the two airbag solenoid valves are respectively connected to the circuit board.

7. The gas cylinder according to any one of claims 2-5, characterized in that, The gas cylinder is further provided with: The air outlet hole of the intake passage intake electromagnetic valve is communicated with the return air passage at one end and is used to communicate with the port Ⅲ of the intake passage intake electromagnetic valve at the other end; The air inlet hole of the intake passage outlet electromagnetic valve is communicated with the intake passage at one end and is used to communicate with the port I of the intake passage outlet electromagnetic valve at the other end.

8. The gas cylinder according to claim 7, characterized in that, The gas cylinder further includes the intake passage intake electromagnetic valve and the intake passage outlet electromagnetic valve. The intake passage intake electromagnetic valve and the intake passage outlet electromagnetic valve are respectively connected to the circuit board. The port Ⅱ of the intake passage intake electromagnetic valve is communicated with the atmosphere, and the port Ⅱ of the intake passage outlet electromagnetic valve is communicated with the atmosphere.

9. The gas cylinder according to any one of claims 2-5, characterized in that, The gas cylinder is further provided with: The air inlet hole of the left pump chamber atmosphere electromagnetic valve is used to communicate with the left pump chamber passage at one end and is used to communicate with the port Ⅱ of the left pump chamber atmosphere electromagnetic valve at the other end; The air inlet hole of the right pump chamber atmosphere electromagnetic valve is used to communicate with the right pump chamber passage at one end and is used to communicate with the port Ⅱ of the right pump chamber atmosphere electromagnetic valve at the other end.

10. The gas cylinder according to claim 9, characterized in that, The gas cylinder further includes the left pump chamber atmosphere electromagnetic valve and the right pump chamber atmosphere electromagnetic valve. The port I of the left pump chamber atmosphere electromagnetic valve is communicated with the atmosphere, the port I of the right pump chamber atmosphere electromagnetic valve is communicated with the atmosphere, and the left pump chamber atmosphere electromagnetic valve and the right pump chamber atmosphere electromagnetic valve are respectively connected to the circuit board.

11. The gas cylinder according to any one of claims 1-5, characterized in that, The large negative pressure air chamber, the large positive pressure air chamber, the small positive pressure air chamber and the small negative pressure air chamber are arranged in parallel and in sequence.

12. The gas cylinder according to any one of claims 1-5, characterized in that, At least one reinforcing rib is arranged in each of the large negative pressure air chamber, the large positive pressure air chamber, the small positive pressure air chamber and the small negative pressure air chamber. The reinforcing rib is perpendicular to the length direction of each air chamber. One end of the reinforcing rib is connected to one inner wall of each air chamber, and the other end is connected to the inner wall on the opposite side of each air chamber.

13. The gas cylinder according to any one of claims 2-5, characterized in that, The number of the liquid path control electromagnetic valves is 10.

14. A gas power device, characterized in that, It includes an air pump and the gas cylinder according to any one of claims 1-13. The positive pressure end of the air pump is communicated with the intake passage of the gas cylinder, and the negative pressure end of the air pump is communicated with the return air passage of the gas cylinder.

15. A peritoneal dialysis machine, characterized in that, The peritoneal dialysis machine includes a liquid path device and the gas power device according to claim 14. The gas power device controls the on and off of the channels of each liquid path of the liquid path device.

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