CN114642810A - Anesthesia machine gas circuit system and ventilation method thereof - Google Patents

Abstract

In order to overcome the problems of large oxygen consumption and limited use scenarios in the existing anesthesia machine, the present invention provides an anesthesia machine air circuit system, including an oxygen supply module, a nitrous oxide supply module, an air supply module, a driving gas switching valve, a breathing gas A mixing module, a breathing end module and a driving end module, the driving end module is used to provide the gas inhalation pressure of the breathing end, the oxygen supply module has a first oxygen shunt and a second oxygen shunt, and the air supply module has a first air shunt and In the second air split, the first oxygen split and the first air split are respectively conducted to the driving gas switching valve, and the driving gas switching valve is conducted to the driving end module. At the same time, the present invention also discloses a ventilation method for the air circuit system of the anesthesia machine. The air circuit system of the anesthesia machine provided by the invention can reduce the consumption of oxygen to a certain extent, and reduce the pressure limit of the oxygen gas source, and improve the stability of the anesthesia machine system.

Description

An anesthesia machine air circuit system and its ventilation method

technical field

The invention belongs to the technical field of inhalation anesthesia equipment, and in particular relates to a ventilation method for an air circuit system of an anesthesia machine.

Background technique

The so-called anesthesia refers to the temporary loss of consciousness in all or part of the organism for surgical treatment. There are various methods of anesthesia, such as acupuncture anesthesia, injection anesthesia and inhalation anesthesia. At present, the method of general anesthesia used in hospitals is still mainly inhalation anesthesia. Inhalation anesthesia has been perfected since 1846, when Browning first applied ether anesthesia. The development of modern pharmacology, the progress of science and technology, especially the application of computer technology, have greatly improved the level of modern inhalation anesthesia. Inhalation anesthesia is easy to control, safe and effective. It is the first choice for surgery in the current hospital. An anesthesia machine is an instrument that uses inhalation anesthesia for general anesthesia.

The anesthesia machines in the current market are mainly pneumatic and electronically controlled, which use gas to drive the bellows of the anesthetic breathing system to provide sufficient pressure for the patient to breathe. At the same time, in special cases, the oxygen supply pressure is insufficient or there is no oxygen, and the machine cannot be used, which limits the usage scenarios of the machine.

SUMMARY OF THE INVENTION

Aiming at the problems of large oxygen consumption and limited usage scenarios in the existing anesthesia machine, the present invention provides a ventilation method for the air circuit system of the anesthesia machine.

The technical scheme adopted by the present invention to solve the above-mentioned technical problems is as follows:

In one aspect, the present invention provides an air circuit system for an anesthesia machine, including an oxygen supply module, a nitrous oxide supply module, an air supply module, a driving gas switching valve, a breathing gas mixing module, a breathing end module and a driving end module. The end module is used to provide the gas inhalation pressure of the breathing end, the oxygen supply module has a first oxygen split and a second oxygen split, the air supply module has a first air split and a second air split, the first oxygen split The shunt and the first air shunt are respectively conducted to the driving gas switching valve, the driving gas switching valve is led to the driving end module, the second oxygen shunt, the nitrous oxide supply module and the The second air shunts are respectively connected to the breathing gas mixing modules, and the breathing gas mixing modules are connected to the breathing end modules.

Optionally, the air circuit system of the anesthesia machine further includes a first pressure reducing valve, a second pressure reducing valve and a third pressure reducing valve, and the second oxygen shunt is connected to the A breathing gas mixing module, the nitrous oxide supply module is connected to the breathing gas mixing module via the second relief valve, and the air supply module is connected to the breathing gas mixing module via the third relief valve.

Optionally, the oxygen supply module includes a pipeline oxygen source supply branch, a backup oxygen source supply branch and a first gas source selection switching valve, the pipeline oxygen source supply branch, the standby oxygen source supply branch, The first oxygen split flow and the second oxygen split flow are respectively connected to the first gas source selection switching valve, and the first gas source selection switching valve is used to switch the pipeline oxygen source supply branch and the backup oxygen A source supply branch supplies oxygen to the first oxygen split and the second oxygen split.

Optionally, the nitrous oxide supply module includes a pipeline nitrous oxide source supply branch, a backup nitrous oxide source supply branch and a second gas source selection switching valve, the pipeline nitrous oxide source supply branch, the backup nitrous The source supply branch is respectively connected to the second gas source selection switching valve, and the second gas source selection switching valve is used to switch the nitrous oxide of the pipeline nitrous oxide source supply branch and the standby nitrous oxide source supply branch. supply.

Optionally, the air supply module includes a pipeline air source supply branch, a backup air source supply branch and a third air source selection switching valve, the pipeline air source supply branch, the standby air source supply branch, The first air split flow and the second air split flow are respectively connected to the third air source selection switching valve, and the third air source selection switching valve is used to switch the pipeline air source supply branch and the backup air A source supply branch supplies air to the first air split and the second air split.

Optionally, the breathing gas mixing module includes a system switch, an oxygen shut-off valve, a flow meter module, a vaporizer module and an ACGO switch module, and the second oxygen shunt goes through the system switch and the oxygen shut-off valve in turn. connected to the flow meter module, the nitrous oxide supply module is connected to the flow meter module via the oxygen shut-off valve, the second air split is connected to the flow meter module via the system switch, the The flowmeter module is connected to the vaporizer module, the vaporizer module is connected to the ACGO switch module, the ACGO switch module is connected to the breathing end module, and the ACGO switch module is provided with an ACGO interface.

Optionally, the breathing gas mixing module further includes a rapid oxygenation pipeline, and the rapid oxygenation pipeline is decomposed and connected to the second oxygen shunt and the ACGO switch module.

Optionally, the driving end module includes a bellows, and the driving gas switching valve is respectively connected to the bellows, the first oxygen split and the first air split.

Optionally, the breathing end module includes an inhalation pipeline and an exhalation pipeline, and the inhalation pipeline is sequentially provided with a first one-way valve, an oxygen concentration detection module and a first flow monitoring module, and the exhalation pipeline is provided with a first one-way valve, an oxygen concentration detection module and a first flow monitoring module. A second flow detection module, a second one-way valve, a carbon dioxide absorption device, an exhalation valve and an exhaust gas recovery module are sequentially arranged on the pipeline, and the bellows is connected to the inhalation pipeline and the exhalation pipeline.

On the other hand, the present invention provides the above-mentioned ventilation method for the air circuit system of an anesthesia machine, comprising the following operation steps:

The oxygen supply module outputs oxygen via the first oxygen shunt and the second oxygen shunt respectively, the air supply module outputs air respectively via the first air shunt and the second air shunt, and the nitrous oxide supply module outputs nitrous oxide. gas;

Controlling and switching the first oxygen sub-flow or the first air sub-flow as the driving gas of the driving end module through the driving gas switching valve;

The proportions of oxygen, nitrous oxide and air supplied by the second oxygen shunt, the nitrous oxide supply module and the second air shunt are adjusted and mixed by the breathing gas mixing module, and the mixed gas is output to the breathing The end module is for patient inhalation, and the drive end module provides the gas inhalation pressure of the breathing end.

According to the air circuit system of the anesthesia machine provided by the present invention, the second oxygen shunt of the oxygen supply module and the second air shunt of the air supply module are used as the nitrous oxide mixed gas of the breathing end module of the anesthesia machine at the same time. Oxygen dependence; at the same time, the first oxygen shunt of the oxygen supply module and the first air shunt of the air supply module can be alternatively used as the driving gas of the driving end module. In different usage scenarios, the operator switches the valve through the driving gas Optionally use air or oxygen to drive the drive end module, thereby providing the breathing end module with the pressure required to assist the patient's breathing, which can reduce the consumption of oxygen to a certain extent, and reduce the pressure limit for the oxygen source, oxygen and air The drive gas alternatively serving as the drive end module also improves the stability of the anesthesia machine system.

Description of drawings

FIG. 1 is a schematic diagram of a module of the air circuit system of an anesthesia machine provided by the present invention.

The reference numerals in the accompanying drawings are as follows:

1. Oxygen supply module; 1a, first oxygen split; 1b, second oxygen split; 11, pipeline oxygen source supply branch; 12, standby oxygen source supply branch; 13, first gas source selection switching valve; 14, High pressure gas source inlet of oxygen pipeline; 15, first filter; 16, first pressure relief valve; 17, third check valve; 18, oxygen backup gas source module; 19, fourth check valve; 2, nitrous oxide Supply module; 21, pipeline nitrous oxide source supply branch; 22, standby nitrous oxide source supply branch; 23, second gas source selection switching valve; 24, nitrous oxide pipeline high-pressure gas source inlet; 25, second filter; 26, the second pressure relief valve; 27, the fifth one-way valve; 28, the nitrous oxide backup air source module; 29, the sixth one-way valve; 3, the air supply module; 3a, the first air shunt; 3b, the second Air diversion; 31, pipeline air source supply branch; 32, standby air source supply branch; 33, third air source selection switching valve; 34, air pipeline high pressure air source inlet; 35, third filter; 36, No. Three pressure relief valves; 37, the seventh one-way valve; 38, the air backup air source module; 39, the eighth one-way valve; 4, the driving gas switching valve; 5, the breathing gas mixing module; 51, the system switch; 52, Oxygen laughter stop valve; 53, flow meter module; 54, vaporizer module; 55, ACGO switch module; 56, ACGO interface; 6, drive end module; 7, breathing end module; 71, first check valve; 72, Oxygen concentration detection module; 73, first flow monitoring module; 74, second flow detection module; 75, pressure detection device; 76, second one-way valve; 77, carbon dioxide absorption device; 78, exhalation valve; 79, exhaust gas Recovery module; 101, a first pressure reducing valve; 102, a second pressure reducing valve; 103, a third pressure reducing valve; 104, an oxygen flow meter; 105, an air flow meter.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Referring to FIG. 1, an embodiment of the present invention provides an air circuit system for an anesthesia machine, including an oxygen supply module 1, a nitrous oxide supply module 2, an air supply module 3, a driving gas switching valve 4, a breathing gas mixing module 5, A breathing end module 7 and a driving end module 6, the driving end module 6 is used to provide the gas inhalation pressure of the breathing end, the oxygen supply module 1 has a first oxygen shunt 1a and a second oxygen shunt 1b, the air supply The module 3 has a first air split flow 3a and a second air split flow 3b, the first oxygen split flow 1a and the first air split flow 3a are respectively conducted to the driving gas switching valve 4, and the driving gas switching valve 4 conducts. Lead to the drive end module 6, the second oxygen shunt 1b, the nitrous oxide supply module 2 and the second air shunt 3b are respectively lead to the breathing gas mixing module 5, the breathing gas mixing module 5 is connected to the breathing end module 7 .

The use of the second oxygen shunt 1b of the oxygen supply module 1 and the second air shunt 3b of the air supply module 3 as the nitrous oxide mixed gas of the breathing end module 7 of the anesthesia machine can reduce the dependence of the air circuit system of the anesthesia machine on oxygen; at the same time, The first oxygen partial flow 1a of the oxygen supply module 1 and the first air partial flow 3a of the air supply module 3 can be alternatively used as the driving gas of the driving end module 6. In different usage scenarios, the operator switches the valve 4 through the driving gas. Optionally use air or oxygen to drive the driving end module 6, and then provide the pressure required for the breathing end module 7 to assist the patient's breathing, which can reduce the consumption of oxygen to a certain extent, and reduce the pressure limit for the oxygen gas source. The use of air and air as the driving gas for the driving end module 6 also improves the stability of the anesthesia machine system.

In one embodiment, the air circuit system of the anesthesia machine further includes a first pressure reducing valve 101, a second pressure reducing valve 102 and a third pressure reducing valve 103, and the second oxygen shunt 1b passes through the first pressure reducing valve 103. The pressure valve 101 is connected to the breathing gas mixing module 5, the nitrous oxide supply module 2 is connected to the breathing gas mixing module 5 through the second pressure reducing valve 102, and the air supply module 3 is connected to the breathing gas mixing module 5 through the third pressure reducing valve 102. The pressure relief valve 103 is connected to the breathing gas mixing module 5 .

The pressure difference between the first oxygen partial flow 1a and the second oxygen partial flow 1b is achieved by setting the first pressure reducing valve 101, and the pressure between the first air partial flow 3a and the second air partial flow 3b is achieved by setting the third pressure reducing valve 103 Therefore, when driving the driving end module 6 to run, it can provide the first oxygen shunt 1a and the first air shunt 3a with higher air pressure; when it is used as breathing gas, it can provide the second oxygen shunt 1b with lower air pressure The same oxygen supply module 1 and air supply module 3 function as driving power and breathing gas at the same time.

In one embodiment, an oxygen flow meter 104 is provided on the second oxygen partial flow 1b, and an air flow meter 105 is set on the second air partial flow 3b to monitor the second oxygen partial flow 1b and the second oxygen partial flow 1b. The flow of oxygen and air on the air split 3b facilitates subsequent control of the amount of oxygen and air to be supplied.

In one embodiment, the oxygen supply module 1 includes a pipeline oxygen source supply branch 11, a backup oxygen source supply branch 12 and a first gas source selection switching valve 13. The pipeline oxygen source supply branch 11, the The backup oxygen source supply branch 12, the first oxygen split flow 1a and the second oxygen split flow 1b are respectively connected to the first gas source selection switching valve 13, and the first gas source selection switching valve 13 is used to switch all the The pipeline oxygen source supply branch 11 and the backup oxygen source supply branch 12 supply oxygen to the first oxygen partial flow 1a and the second oxygen partial flow 1b.

Specifically, the oxygen source supply branch 11 of the pipeline is provided with an oxygen pipeline high-pressure gas source inlet 14, a first filter 15 and a third one-way valve 17 in sequence, and the oxygen pipeline high-pressure gas source inlet 14 is used for connecting High-pressure oxygen pipeline, the first filter 15 is used to filter the input high-pressure oxygen to prevent impurities from entering the oxygen source supply branch 11 of the pipeline, and the third one-way valve 17 is used to avoid the backflow of oxygen and Leakage; the backup oxygen source supply branch 12 is provided with an oxygen backup gas source module 18 and a fourth one-way valve 19 in turn, and the oxygen backup gas source module 18 is a detachable oxygen cylinder or other oxygen storage or preparation device , the fourth one-way valve 19 is used to avoid backflow and leakage of oxygen; the third one-way valve 17 and the fourth one-way valve 19 are respectively connected to the first gas source selection switching valve 13 .

When the high-pressure gas source inlet 14 of the oxygen pipeline and the oxygen backup gas source module 18 are connected to the gas source at the same time, under the action of the first gas source selection switching valve 13, the pipeline gas source is preferentially selected to be supplied to the subsequent gas circuit system; When only one of the oxygen source supply branch 11 and the backup oxygen source supply branch 12 is connected, select the connected gas source for oxygen supply, which can adapt to different scenarios to switch oxygen supply to ensure the normal and stable air circuit system of the anesthesia machine run.

In one embodiment, the pipeline oxygen source supply branch 11 is provided with a first pressure relief valve 16, and the first pressure relief valve 16 is used to relieve the pressure when the pressure of the pipeline oxygen source is too large to avoid Safety hazards caused by excessive pipeline pressure.

In one embodiment, the nitrous oxide supply module 2 includes a pipeline nitrous oxide source supply branch 21, a backup nitrous oxide source supply branch 22 and a second gas source selection switching valve 23. The pipeline nitrous oxide source supply branch 21. The standby nitrous oxide source supply branch 22 is respectively connected to the second gas source selection switching valve 23, and the second gas source selection switching valve 23 is used to switch the pipeline nitrous oxide source supply branch 21 and all The nitrous oxide supply of the backup nitrous gas source supply branch 22 is described.

Specifically, the pipeline nitrous oxide source supply branch 21 is sequentially provided with a nitrous oxide pipeline high-pressure gas source inlet 24, a second filter 25 and a fifth one-way valve 27. The nitrous oxide pipeline high-pressure gas source inlet 24 is used for In order to access the high-pressure nitrous oxide pipeline, the second filter 25 is used to filter the input high-pressure nitrous oxide to prevent impurities from entering the pipeline nitrous oxide source supply branch 21, and the fifth one-way valve 27 is used for In order to avoid the backflow and leakage of nitrous oxide; the backup nitrous oxide source supply branch 22 is sequentially provided with nitrous oxide backup gas source module 28 and the sixth one-way valve 29, and the nitrous oxide backup gas source module 28 is detachable The nitrous oxide bottle or other nitrous oxide storage or preparation device, the sixth one-way valve 29 is used to avoid the backflow and leakage of nitrous oxide; the fifth one-way valve 27 and the sixth one-way valve 29 are respectively connected to the The second gas source selection switching valve 23 .

When the high-pressure gas source inlet 24 of the nitrous oxide pipeline and the nitrous oxide backup gas source module 28 are connected to the gas source at the same time, under the action of the second gas source selection switching valve 23, the pipeline gas source is preferentially selected to be supplied to the subsequent gas circuit system; When there is only one connection between the pipeline nitrous oxide source supply branch 21 and the standby nitrous oxide source supply branch 22, select the connected gas source for nitrous oxide supply, which can adapt to different scenarios to switch nitrous oxide supply to ensure the anesthesia machine The normal and smooth operation of the pneumatic system.

In one embodiment, the pipeline nitrous oxide source supply branch 21 is provided with a second pressure relief valve 26, and the second pressure relief valve 26 is used to relieve pressure when the pipeline nitrous oxide source pressure is too large. , to avoid potential safety hazards caused by excessive pipeline pressure.

In one embodiment, the air supply module 3 includes a pipeline air source supply branch 31, a backup air source supply branch 32 and a third air source selection switching valve 33. The pipeline air source supply branch 31, the The backup air source supply branch 32 , the first air branch flow 3a and the second air branch flow 3b are respectively connected to the third air source selection switching valve 33, and the third air source selection switching valve 33 is used to switch all the air sources. The ducted air source supply branch 31 and the backup air source supply branch 32 supply air to the first air branch 3a and the second air branch 3b.

Specifically, the pipeline air source supply branch 31 is provided with an air pipeline high-pressure air source inlet 34, a third filter 35 and a seventh one-way valve 37 in sequence, and the air pipeline high-pressure air source inlet 34 is used for connecting The high-pressure air pipeline, the third filter 35 is used to filter the input high-pressure air to prevent impurities from entering the pipeline air source supply branch 31, and the seventh one-way valve 37 is used to avoid air backflow and Leakage; the backup air source supply branch 32 is provided with an air backup air source module 38 and an eighth one-way valve 39 in turn, and the air backup air source module 38 is an air compressor or other high-pressure air supply device. The eighth one-way valve 39 is used to avoid backflow and leakage of air; the seventh one-way valve 37 and the eighth one-way valve 39 are respectively connected to the third air source selection switching valve 33 .

When the high-pressure air source inlet 34 of the air pipeline and the air backup air source module 38 are connected to the air source at the same time, under the action of the third air source selection switching valve 33, the pipeline air source is preferentially selected to be supplied to the subsequent air circuit system; When only one of the air source supply branch 31 and the backup air source supply branch 32 is connected, select the connected air source for air supply, which can adapt to different scenarios to switch the air supply to ensure the normal and stable air circuit system of the anesthesia machine run.

In one embodiment, the pipeline air source supply branch 31 is provided with a third pressure relief valve 36, and the third pressure relief valve 36 is used to relieve the pressure when the pressure of the pipeline air source is too large to avoid Safety hazards caused by excessive pipeline pressure.

In one embodiment, the breathing gas mixing module 5 includes a system switch 51, an oxygen shut-off valve 52, a flow meter module 53, a vaporizer module 54 and an ACGO switch module 55 (Auxiliary Common Gas Outlet, auxiliary common gas outlet), The second oxygen shunt 1b is sequentially connected to the flow meter module 53 via the system switch 51 and the oxygen shut-off valve 52, and the nitrous oxide supply module 2 is connected to the oxygen shut-off valve 52. Flow meter module 53, the second air split 3b is connected to the flow meter module 53 via the system switch 51, the flow meter module 53 is connected to the vaporizer module 54, and the vaporizer module 54 is connected to the The ACGO switch module 55 is connected to the breathing end module 7 , and the ACGO switch module 55 is provided with an ACGO interface 56 .

The system switch 51 is used to control the air and oxygen supply of the second air shunt 3b and the second oxygen shunt 1b to the breathing end module 7; the oxygen shut-off valve 52 is used to regulate oxygen and nitrous oxide Specifically, the flow rate of oxygen, nitrous oxide and air in the vaporizer module 54 is respectively detected by the flow meter module 53, and the oxygen and nitrous oxide cut-off valve 52 respectively controls the second oxygen shunt 1b and the on-off of the nitrous oxide supply module 2, the system switch 51 controls the on-off of the second air shunt 3b and the second oxygen shunt 1b respectively, the vaporizer module 54 is used for oxygen, A mixture of air and air.

The ACGO switch module 55 is used to switch the breathing gas between the breathing end module 7 and the ACGO interface 56 , and deliver fresh gas to the external artificial respiration system through the ACGO interface 56 .

In an embodiment, the breathing gas mixing module 5 further includes a rapid oxygen filling pipeline, and the rapid oxygen filling pipeline is decomposed and connected to the second oxygen shunt 1b and the ACGO switch module 55 .

The rapid oxygenation pipeline is used to rapidly and directly supply oxygen to the ACGO switch module 55 using the second oxygen split flow 1b.

In one embodiment, the driving end module 6 includes a bellows, and the driving gas switching valve 4 is respectively connected to the bellows, the first oxygen partial flow 1a and the first air partial flow 3a, and is switched by the driving gas. The valve 4 switches the first oxygen shunt 1a and the first air shunt 3a as the driving gas of the bellows, and the bellows provides the auxiliary pressure of the breathing end module 7 to assist the patient to breathe and ensure that the nitrous oxide enters the patient. the lungs to achieve a stable anesthetic effect.

In one embodiment, the breathing end module 7 includes an inspiratory pipeline and an expiratory pipeline, and the inspiratory pipeline is provided with a first one-way valve 71, an oxygen concentration detection module 72 and a first flow monitoring module in sequence. 73. A second flow detection module 74, a second one-way valve 76, a carbon dioxide absorption device 77, an exhalation valve 78 and an exhaust gas recovery module 79 are sequentially arranged on the exhalation pipeline, and the bellows is connected to the inhalation pipeline and the expiratory circuit.

When the patient inhales, the mixed gas in the vaporizer module 54 reaches the patient end through the first one-way valve 71, the oxygen concentration detection module 72 and the first flow monitoring module 73 to complete the inspiratory phase; when the patient exhales, the exhaled gas It enters the carbon dioxide absorption device 77 through the second flow detection module 74 and the second one-way valve 76 at the proximal end of the patient, and is discharged through the exhalation valve 78 and the exhaust gas recovery module 79 to complete the expiratory phase.

In one embodiment, a pressure detection device 75 is further provided on the exhalation pipeline.

Another embodiment of the present invention provides the above-mentioned ventilation method for the air circuit system of an anesthesia machine, including the following operation steps:

The oxygen supply module 1 outputs oxygen through the first oxygen partial flow 1a and the second oxygen partial flow 1b, respectively, the air supply module 3 outputs air through the first air partial flow 3a and the second air partial flow 3b, respectively. The nitrous oxide supply module 2 outputs nitrous gas;

Control and switch the first oxygen partial flow 1a or the first air partial flow 3a as the driving gas of the driving end module 6 through the driving gas switching valve 4;

The ratios of oxygen, nitrous oxide and air supplied by the second oxygen shunt 1b, the nitrous oxide supply module 2 and the second air shunt 3b are adjusted and mixed by the breathing gas mixing module 5, and the mixed gas is output To the breathing end module 7 for patient inhalation, the driving end module 6 provides the gas suction pressure of the breathing end.

By setting the breathing gas mixing module 5 to switch the breathing gas mixture, and simultaneously setting the driving gas switching valve 4 to switch the driving gas source of the driving end module 6, it is possible to effectively deal with problems such as insufficient oxygen pressure or lack of oxygen. The supply situation ensures the stable operation of the anesthesia machine and expands the applicable scenarios of the anesthesia machine.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. an anesthesia machine air circuit system, is characterized in that, comprises oxygen supply module, nitrous oxide supply module, air supply module, driving gas switching valve, breathing gas mixing module, breathing end module and driving end module, described driving end The module is used to provide the gas inhalation pressure of the breathing end, the oxygen supply module has a first oxygen split and a second oxygen split, the air supply module has a first air split and a second air split, and the first oxygen split and the first air shunt are respectively conducted to the drive gas switching valve, the drive gas switching valve is conducted to the drive end module, the second oxygen shunt, the laughing gas supply module and the first The two air shunts are respectively connected to the breathing gas mixing module, and the breathing gas mixing module is connected to the breathing end module. 2. The anesthesia machine air circuit system according to claim 1, wherein the anesthesia machine air circuit system further comprises a first pressure reducing valve, a second pressure reducing valve and a third pressure reducing valve. The dioxygen shunt is connected to the breathing gas mixing module via the first relief valve, the nitrous oxide supply module is connected to the breathing gas mixing module via the second relief valve, and the air supply module is connected to the breathing gas mixing module via the second relief valve. The third pressure relief valve is connected to the breathing gas mixing module. 3. The air circuit system of an anesthesia machine according to claim 1, wherein the oxygen supply module comprises a pipeline oxygen source supply branch, a backup oxygen source supply branch and a first gas source selection switching valve, and the pipeline The oxygen source supply branch, the backup oxygen source supply branch, the first oxygen shunt and the second oxygen shunt are respectively connected to the first gas source selection switching valve, and the first gas source selection switching valve is used for The oxygen supply of the first oxygen split flow and the second oxygen split flow is performed by switching the pipeline oxygen source supply branch and the backup oxygen source supply branch. 4. the anesthesia machine air circuit system according to claim 1, is characterized in that, described nitrous oxide supply module comprises pipeline nitrous oxide source supply branch, standby nitrous oxide source supply branch and second gas source selection switching valve, The pipeline nitrous oxide source supply branch and the standby nitrous oxide source supply branch are respectively connected to the second gas source selection switching valve, and the second gas source selection switching valve is used to switch the pipeline nitrous oxide source supply. The branch circuit and the backup nitrous gas source supply branch circuit for the supply of nitrous oxide. 5. The air circuit system of an anesthesia machine according to claim 1, wherein the air supply module comprises a pipeline air source supply branch, a backup air source supply branch and a third air source selection switching valve, and the pipeline The air source supply branch, the backup air source supply branch, the first air branch and the second air branch are respectively connected to the third air source selection switching valve, and the third air source selection switching valve is used for and switching the air supply of the duct air source supply branch and the backup air source supply branch to the air supply of the first air branch and the second air branch. 6. The air circuit system of an anesthesia machine according to claim 1, wherein the breathing gas mixing module comprises a system switch, an oxygen shut-off valve, a flow meter module, a vaporizer module and an ACGO switch module, and the second The oxygen shunt is sequentially connected to the flow meter module via the system switch and the oxygen shut-off valve, the nitrous oxide supply module is connected to the flow meter module via the oxygen shut-off valve, and the second air shunt is connected to the flow meter module. Connected to the flow meter module via the system switch, the flow meter module is connected to the vaporizer module, the vaporizer module is connected to the ACGO switch module, the ACGO switch module is connected to the breathing end module, so The ACGO switch module is provided with an ACGO interface. 7 . The air circuit system of an anesthesia machine according to claim 6 , wherein the breathing gas mixing module further comprises a rapid oxygenation pipeline, and the rapid oxygenation pipeline is decomposed and communicated with the second oxygen shunt and all the other components. 8 . Describe the ACGO switch module. 8 . The air circuit system of an anesthesia machine according to claim 1 , wherein the driving end module comprises a bellows, and the driving gas switching valve is respectively connected to the bellows, the first oxygen shunt and the first oxygen shunt. 9 . Air diversion. 9 . The air circuit system of an anesthesia machine according to claim 8 , wherein the breathing end module comprises an inhalation pipeline and an exhalation pipeline, and the inhalation pipeline is sequentially provided with a first check valve, An oxygen concentration detection module and a first flow monitoring module, a second flow detection module, a second one-way valve, a carbon dioxide absorption device, an exhalation valve and an exhaust gas recovery module are sequentially arranged on the exhalation pipeline, and the bellows is connected to the Inspiratory circuit and the expiratory circuit. 10. The ventilation method for an anesthesia machine air circuit system according to any one of claims 1 to 9, characterized in that it comprises the following operation steps: The oxygen supply module outputs oxygen via the first oxygen shunt and the second oxygen shunt respectively, the air supply module outputs air respectively via the first air shunt and the second air shunt, and the nitrous oxide supply module outputs nitrous oxide. gas; Controlling and switching the first oxygen sub-flow or the first air sub-flow as the driving gas of the driving end module through the driving gas switching valve; The proportions of oxygen, nitrous oxide and air supplied by the second oxygen shunt, the nitrous oxide supply module and the second air shunt are adjusted and mixed by the breathing gas mixing module, and the mixed gas is output to the breathing The end module is for patient inhalation, and the drive end module provides the gas inhalation pressure of the breathing end.

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