CN120919476A

CN120919476A - Anesthesia machine

Info

Publication number: CN120919476A
Application number: CN202511311069.0A
Authority: CN
Inventors: 孙新兴; 刘加龙; 乔桂新
Original assignee: Hebei Yian Aomei Medical Equipment Co ltd
Current assignee: Hebei Yian Aomei Medical Equipment Co ltd
Priority date: 2025-09-15
Filing date: 2025-09-15
Publication date: 2025-11-11

Abstract

This application discloses an anesthesia machine, comprising: a gas supply system, a flow control system, an anesthetic gas delivery system, and a circuit system; the gas supply system includes a nitrous oxide assembly for providing nitrous oxide, an oxygen assembly for providing oxygen, and an air assembly for providing air; the flow control system includes a first flow control branch and a second flow control branch; the anesthetic gas delivery system includes a bypass valve, an vaporizer, and an auxiliary fresh gas outlet switch for generating and delivering anesthetic gas; the circuit system includes an inhalation branch, an expiratory branch, a paramagnetic oxygen sensor, an anesthetic gas concentration detection assembly, a manual/mechanical control switch, an automatic assisted breathing branch, a manual assisted breathing branch, and a heating assembly. The anesthesia machine of this application reduces the space required for gas source pressure monitoring, lowers the risk of gas leakage, and can supply oxygen even in the event of a power outage, thus improving the safety of the anesthesia machine.

Description

Anesthesia machine

Technical Field

The application relates to the technical field of anesthesia machines, in particular to an anesthesia machine.

Background

The anesthesia machine is used for controlling the anesthesia state of a patient and maintaining vital signs (respiratory support) in the operation process, and mainly helps to safely complete the operation in a painless state by accurately delivering anesthetic gas and oxygen.

The prior art of the traditional anesthesia machine has the defects that the air source pressure of the traditional anesthesia machine obtains a pressure value through the reading of a mechanical pressure gauge, and the mechanical pressure gauge has lower precision; the high-pressure reducer of the traditional anesthesia machine can obviously lower the output pressure along with the increase of the output flow, most of the flowmeter of the traditional anesthesia machine is of a mechanical float type, the flow output precision is low, the floats are easy to jump, some anesthesia machines are provided with electric control flowmeters, the volume is large and abnormal sound is easy to occur, the auxiliary oxygen supply flow of the traditional anesthesia machine is generally within 15L/min, the maximum value of the output flow is smaller and cannot meet clinical requirements, the driving gas of the traditional anesthesia machine is generally only oxygen, the oxygen consumption of the driving gas is high, the oxygen consumption cost is high, the outlet pressure of the driving gas reducing valve of the traditional anesthesia machine is not provided with a detection device, the abnormal working condition of the anesthesia machine is caused when the output of the driving gas pressure is abnormal, the IP valve of the traditional anesthesia machine is easy to generate abnormal sound in a system gas path, the oxygen concentration of the detection end of the traditional anesthesia machine is generally used by an oxygen battery, the oxygen battery is a consumable material and has short effective period, the traditional anesthesia machine is not designed for the expiratory pressure monitoring, the PEEP value is inaccurate, the fresh gas of the traditional anesthesia machine is far away from an air suction check valve at the inlet position of an absorption loop, the gas concentration is slow to rise, the automatic calibration gas is high, the automatic calibration gas is not used, the automatic calibration device is not easy to detect the oxygen consumption sensor is used, the automatic calibration device is not used, the automatic calibration device is accurate, the sensor is used for detecting the expiratory flow sensor is not used, the breathing gas has a time is easy to take time has a time sensor is used, and the function is used for sensing the function is used and has no air sensor has a time sensor has and has a function required to be used and has a high sensor and has a function convenient function.

Disclosure of Invention

The application aims to overcome the defects of the prior art and provides an anesthesia machine.

An anesthesia machine comprises an air supply system, a flow control system and a safety oxygen component which are connected with the air supply system, and an anesthesia gas conveying system and a loop system which are connected with the flow control system and the safety oxygen component;

The gas supply system comprises a laughing gas component for providing laughing gas, an oxygen component for providing oxygen and an air component for providing air, wherein pressure sensors and high-pressure decompressors are arranged in the laughing gas component, the oxygen component and the air component;

the flow control system comprises a first flow control branch and a second flow control branch, and is used for providing laughing gas and air or laughing gas and oxygen after flow control for the anesthetic gas delivery system when power is supplied;

One end of the safety oxygen component is connected with the oxygen component, the other end of the safety oxygen component is connected with the flow control system and is used for controlling the flow of oxygen when the anesthesia machine is powered off, and the safety oxygen component comprises a safety oxygen transfer switch 50, an electromagnetic valve 21, a safety oxygen regulating valve 25 and a safety oxygen flowmeter 20 which are connected;

the anesthetic gas delivery system comprises a bypass valve 23, a vaporizer 24 and an auxiliary fresh gas outlet switch 36 for generating and delivering anesthetic gas;

The circuit system comprises an inhalation branch, an exhalation branch, a paramagnetic oxygen sensor 44, an anesthetic gas concentration detection assembly 43, a manual control transfer switch 35, an automatic auxiliary breathing branch, a manual auxiliary breathing branch and a heating assembly 46, and is connected with the anesthetic gas delivery system through the inhalation branch.

In some embodiments, the laughing gas assembly comprises a first laughing gas branch, a second laughing gas branch and a pressure reducing valve 12, wherein the first laughing gas branch comprises a laughing gas pipeline gas source 1, a filter 6, a low-pressure sensor 10 and a one-way valve 9 which are connected, and the second laughing gas branch comprises a laughing gas high-pressure gas cylinder 2, a filter 6, a high-pressure sensor 8, a second high-pressure reducer 11 and a one-way valve 9 which are connected;

The air assembly comprises an air pipeline air source 3, a filter 6, the low pressure sensor 10, a one-way valve 9 and the pressure reducing valve 12 which are connected;

The oxygen assembly comprises a first oxygen branch, a second oxygen branch and a pressure reducing valve 12, wherein the first oxygen branch comprises an oxygen pipeline air source 4, a filter 6, a low-pressure sensor 10 and a one-way valve 9 which are connected, the second oxygen branch comprises an oxygen high-pressure air bottle 5, the filter 6, a second high-pressure sensor 8, a first high-pressure reducer 7 and the one-way valve 9 which are connected, and the one-way valve 9 of the first oxygen branch and the one-way valve 9 of the second oxygen branch are connected with the pressure reducing valve 12.

In some embodiments, the first flow control branch is connected to the smile component or the air component, and the second flow control branch is connected to the oxygen component;

the first flow control branch comprises an electromagnetic valve 15, a proportional valve 16 and an electronic flowmeter 17 which are respectively connected with the laughing gas assembly and the air assembly, so that the first flow control branch is connected with the laughing gas assembly or the air assembly by controlling the on-off of the electromagnetic valve 15;

the second flow control branch comprises a solenoid valve 15, a proportional valve 16 and an electronic flowmeter 17 which are connected with the oxygen component;

The outlets of the electromagnetic valve 15 in the first flow control branch and the second flow control branch are opposite to the air passage between the inlets of the proportional valve 16, and the aperture of the air passage outlet of the electromagnetic valve 15 is larger than that of the air passage outlet of the proportional valve 16.

In some embodiments, the bypass valve 23 is connected to the first flow control branch and the second flow control branch, respectively.

In some embodiments, the suction branch includes a suction differential pressure assembly 41, a first airway pressure sensor 47, a second airway pressure sensor 60, a suction check valve 38, and a soda-lime tank 37;

One end of the air suction differential pressure assembly 41 is connected with the patient 42, the other end of the air suction differential pressure assembly 41 is connected with one end of the air suction check valve 38, the first air passage pressure sensor 47 and the second air passage pressure sensor 60 are arranged between the air suction differential pressure assembly 41 and the air suction check valve 38, the other end of the air suction check valve 38 is connected with the auxiliary fresh air outlet switch 36, the other end of the air suction check valve 38 is connected with one end of the soda lime tank 37, and the other end of the soda lime tank 37 is respectively connected with the automatic auxiliary breathing branch and the manual auxiliary breathing branch;

the exhalation branch includes an exhalation differential pressure assembly 40, an exhalation pressure sensor 53, and an exhalation check valve 39;

One end of the expiratory pressure difference component 40 is connected with the patient 42, the other end is connected with the expiratory one-way valve 39, the expiratory pressure sensor 53 is arranged between the expiratory pressure difference component 40 and the expiratory one-way valve 39, and the expiratory one-way valve 39 is respectively connected with the automatic auxiliary breathing branch and the manual auxiliary breathing branch;

The paramagnetic oxygen sensor 44 and the anesthetic gas concentration detection assembly 43 are connected to the inhalation branch and the exhalation branch, respectively.

In some embodiments, the inspiratory differential pressure assembly 41 comprises a first solenoid valve 54, a second solenoid valve 55, and an inspiratory flow sensor 58, and the expiratory differential pressure assembly 40 comprises a third solenoid valve 56, a fourth solenoid valve 57, and an expiratory flow sensor 59.

In some embodiments, the automatic assisted breathing circuit includes a drive gas transfer switch 13, a pressure relief valve 26, a drive gas pressure sensor 52, a gas circuit module assembly, a gas barrier 29, an IP valve 30, an exhalation valve 32, an exhaust treatment device 48, and a coil 34 for automatic assisted breathing;

The first end of the driving air change-over switch 13 is connected with the oxygen component, the second end is arranged in the air, the third end is connected with one end of the pressure reducing valve 26, the other end of the pressure reducing valve 26 is connected with the first end of the air passage module component, the second end of the air passage module component is connected with one end of the air resistor 29, the third end is connected with the coil 34, the coil 34 is connected with the manual control change-over switch 35, the driving air pressure sensor 52 is arranged between the pressure reducing valve 26 and the air passage module component, one end of the air exhaling valve 32 is arranged between the air passage module component and the coil 34, the other end is connected with the waste gas treatment device 48, the other end of the air resistor 29 is connected with one end of the IP valve 30, and the other end of the IP valve 30 is arranged in the air;

the manual assisted breathing branch comprises a bellows 45 for manual assisted breathing.

In some embodiments, the air circuit module assembly comprises an air suction valve 28, a filter 6, a flow sensor 51, a safety valve 31 and a solenoid valve 27, wherein one end of the air suction valve 28 is connected with the pressure reducing valve 26, the other end of the air suction valve is connected with one end of the filter 6, the other end of the filter 6 is connected with one end of the flow sensor 51, the other end of the flow sensor 51 is connected with the coil 34, the flow sensor 31 is arranged between the flow sensor 51 and the coil 34, one end of the solenoid valve 27 is connected with the pressure reducing valve 26, and the other end of the solenoid valve 27 is connected with one end of the air resistor 29.

In some embodiments, further comprising an oxygen therapy assembly and a safety oxygen assembly, the oxygen therapy assembly coupled to the oxygen assembly for providing supplemental supply of oxygen, the oxygen therapy assembly comprising a rotary regulated flow regulator valve (19) and a 60L flow meter 18;

One end of the safety oxygen component is connected with the oxygen component, the other end of the safety oxygen component is connected with the flow control system and is used for controlling the flow of oxygen when the anesthesia machine is powered off, and the safety oxygen component comprises a safety oxygen transfer switch 50, an electromagnetic valve 21, a safety oxygen regulating valve 25 and a safety oxygen flowmeter 20 which are connected.

In some embodiments, a rapid oxygen supply assembly 22 is further included, one end of the rapid oxygen supply assembly 22 is connected to the oxygen assembly, and the other end is connected to the anesthetic gas delivery system for diluting anesthetic gas concentration.

Compared with the prior art, the application has the advantages that:

(1) According to the laughing gas pressure monitoring device, the laughing gas assembly, the air assembly and the oxygen assembly are sampled and monitored through the pressure sensor, so that the arrangement space for monitoring the gas source pressure is reduced, the risk of gas leakage is reduced, and the electronization of the gas source pressure monitoring is realized;

(2) The high-pressure reducer can make the difference between the outlet pressure and the pressure of 0.3MPa in initial adjustment not obvious, and the difference is within +/-0.03 MPa;

(3) The intelligent flow control device can accurately output flow through the flow control system to realize electronic control adjustment of flow output, the whole electronic control flowmeter is highly integrated, the ingenious gas circuit design avoids abnormal sound problems easily occurring in the electronic control flowmeter, the accuracy of reading of a flow sensor in the electronic control flowmeter is guaranteed in a limited space, meanwhile, high flow of oxygen can be realized, the accurate output flow can reach 60L/min, meanwhile, oxygen supply can be carried out when the anesthesia machine loses electricity through the safety oxygen component, and the safety of the anesthesia machine is improved.

(5) According to the application, the driver change-over switch can be used for selecting the driving gas from air and oxygen, and the air can be automatically selected for driving when the air exists, so that the gas use cost in the operation is reduced;

(6) The electronic pressure sensor is arranged at the outlet of the driving gas to monitor, so that the risk of inaccurate inhalation and exhalation tidal volume caused by insufficient or overlarge driving gas pressure is reduced;

(7) The front end of the valve port of the IP valve is provided with the air volume space, so that the problem of abnormal sound of the IP valve under specific conditions can be effectively prevented;

(8) The oxygen concentration monitoring device has the advantages that the oxygen concentration monitoring device has no consumable, has a calibration function, and can calibrate the electromagnetic valve at the front end of the inlet of the paramagnetic oxygen module when power is supplied, so that the oxygen concentration is normally monitored when power is lost, and the risk that the oxygen concentration cannot be monitored due to the failure of the electromagnetic valve is reduced;

(9) The front end of the expiration one-way valve is provided with the electronic expiration pressure sensor, so that a correct feedback signal is provided for the closed-loop control of PEEP, and the end expiration airway pressure of a patient is accurately controlled;

(10) The inlet position of the fresh gas in the gas suction branch is very close to (in front of) the gas suction check valve, so that the gas suction amount of a patient contains all fresh gas which is newly supplied during each gas suction, and the concentration rising rate of anesthetic gas is improved;

(11) The automatic calibration device has the functions of automatically calibrating the inspiration flow sensor and the expiration flow sensor, avoids the problem of inaccurate tidal volume after long service time, has high calibration speed, and saves time and labor compared with manual calibration;

(12) The driving gas adopts a coil pipe type gas circuit built-in design, so that the gas discharge of anesthetic gas in a loop system can be reduced, the consumption of gunpowder is saved, the volume required by the driving gas function is reduced, and the gas leakage risk is reduced;

(13) The inhalation flow sensor and the exhalation flow sensor have the function of automatic zero correction, and inaccurate detection of the tidal volume caused by zero drift of the sensor is avoided.

Drawings

FIG. 1 is a schematic diagram of the air path structure of an anesthesia machine provided by the embodiment of the application;

FIG. 2 is a schematic view of the gas circuit structure of the laughing gas assembly provided by the embodiment of the application;

FIG. 3 is a schematic view of an air circuit structure of an air module according to an embodiment of the present application;

FIG. 4 is a schematic diagram of the gas circuit structure of an oxygen assembly according to the present application;

FIG. 5 is a schematic diagram of the air path structure of the flow control system according to the embodiment of the present application;

FIG. 6 is a schematic diagram of the gas circuit structure of the anesthetic gas delivery system according to the embodiment of the present application;

FIG. 7 is a schematic diagram of the circuit configuration of the inspiration limb and expiration limb provided by the present application;

FIG. 8 is a schematic diagram of the structure of an automatic auxiliary breathing circuit and a manual auxiliary breathing circuit provided by the embodiment of the application;

FIG. 9 is a schematic diagram of a safety oxygen component gas circuit structure provided by the embodiment of the application;

FIG. 10 is a schematic diagram of the gas circuit structure of the rapid feeding assembly according to the present application;

FIG. 11 is a schematic view of the gas circuit structure of an oxygen therapy assembly according to an embodiment of the present application;

FIG. 12 is a schematic diagram of an auxiliary power air circuit structure provided by the embodiment of the application;

FIG. 13 is a schematic diagram of an IP valve structure according to an embodiment of the present application;

Fig. 14 is a cross-sectional view of an IP valve provided by an embodiment of the present application.

Reference numeral 1, laughing gas pipeline gas source; 2, laughing gas high-pressure gas cylinder; 3, an air pipeline air source; an oxygen line source, 5, oxygen high pressure cylinder, 6, filter, 7, first high pressure reducer, 8, high pressure sensor, 9, one-way valve, 10, low pressure sensor, 11, second high pressure reducer, 12, pressure relief valve, 13, drive gas transfer switch, 14, atmospheric end, 15, solenoid valve, 16, proportional valve, 17, electronic flowmeter, 18, 60L flowmeter, 19, flow regulating valve, 20, safety oxygen flow meter, 21, solenoid valve, 22, rapid oxygen supply assembly, 23, bypass valve, 24, evaporator, 25, safety oxygen regulating valve, 26, pressure relief valve, 27, solenoid valve, 28, inhalation valve, 29, pneumatic resistor, 30, IP valve, 31, safety valve, 32, exhalation valve, 33, APL valve, 34, coil, 35, manual drive gas transfer switch, 36, auxiliary fresh gas outlet switch, 37, sodium lime tank, 38, inhalation one-way valve, 39, inhalation one-way valve, 40, differential pressure assembly, 41, inhalation assembly, 42, patient, 43, gas pressure sensor, 46, air pressure sensor, 48, air sensor, 35, air pressure sensor, 35, air sensor, 31, air resistance, 31, 32, air pressure sensor, 32, 33, air sensor, 33, 35, air sensor, 30, valve, 30, valve, 30 valve, 30, valve 30, 306, a gas volume space and a steady flow porous plate.

Detailed Description

The technical scheme of the application is described in detail below with reference to the accompanying drawings and examples.

An embodiment of the present application provides an anesthesia machine for anesthetizing a patient 42 during a surgical procedure, and in particular, as shown in fig. 1, the anesthesia machine includes an air supply system, a flow control system connected to the air supply system, an anesthetic gas delivery system connected to the flow control system, and a loop system connected to the anesthetic gas delivery system. Wherein, the air supply system is used for providing air and laughing gas, or providing oxygen and laughing gas. The flow control system is used for controlling the flow of the supplied air and laughing gas or the supplied oxygen and laughing gas. The anesthetic gas conveying system is used for mixing the vaporized anesthetic drug with the gas provided by the gas supply system to generate anesthetic gas and conveying the anesthetic gas to the loop system. The circuit system is used to deliver anesthetic gases to the patient's lungs to anesthetize the patient, while also being used to assist the patient in breathing.

Further, the method comprises the steps of. The gas supply system comprises a laughing gas component for providing laughing gas, an oxygen component for providing oxygen and an air component for providing air, wherein the laughing gas component, the oxygen component and the air component are respectively provided with a pressure sensor and a high-pressure reducer. Specifically, the laughing gas assembly comprises a first laughing gas branch, a second laughing gas branch and a pressure reducing valve 12, the first laughing gas branch comprises a laughing gas pipeline gas source 1, a filter 6, a low-pressure sensor 10 and a one-way valve 9 which are connected, the second laughing gas branch comprises a laughing gas high-pressure gas cylinder 2, the filter 6, a high-pressure sensor 8, a second high-pressure reducer 11 and the one-way valve 9 which are connected, and the one-way valve 9 of the first laughing gas branch and the one-way valve 9 of the second laughing gas branch are connected with the pressure reducing valve 12. Specifically, if laughing gas is supplied from the laughing gas pipe gas source 1, the laughing gas is filtered by the filter 6 and then enters the pressure reducing valve 12 through the one-way valve 9, the laughing gas enters the flow control system after the pressure reduction of the laughing gas is completed, meanwhile, the low pressure sensor 10 is used for monitoring the pressure of the laughing gas, if the laughing gas is supplied from the laughing gas high pressure gas cylinder 2, the laughing gas is filtered by the filter 6 and then enters the second high pressure reducer 11 for first pressure reduction, the laughing gas after the first pressure reduction enters the pressure reducing valve 12 through the one-way valve 9, the laughing gas enters the flow control system after the second pressure reduction of the laughing gas is completed, and meanwhile, the high pressure sensor 8 is used for monitoring the pressure of the laughing gas.

The air assembly comprises an air pipeline air source 3, a filter 6, a low pressure sensor 10, a one-way valve 9 and a pressure reducing valve 12 which are connected. Specifically, referring to fig. 3, after the air of the air pipe air source 3 is filtered by the filter 6, the air enters the pressure reducing valve 12 through the check valve 9, and is subjected to pressure reduction, and then the flow control system is controlled, and at the same time, the air pressure is monitored by the low pressure sensor 10.

Referring to fig. 4, the oxygen assembly comprises a first oxygen branch, a second oxygen branch and a pressure reducing valve 12, wherein the first oxygen branch comprises an oxygen pipeline air source 4, a filter 6, a low-pressure sensor 10 and a one-way valve 9 which are connected, the second oxygen branch comprises an oxygen high-pressure air bottle 5, the filter 6, a high-pressure sensor 8, a first high-pressure reducer 7 and the one-way valve 9 which are connected, and the one-way valve 9 of the first oxygen branch and the one-way valve 9 of the second oxygen branch are connected with the pressure reducing valve 12. Specifically, if oxygen is provided by the oxygen pipeline air source 4, the oxygen is filtered by the filter 6 and then enters the pressure reducing valve 12 through the one-way valve 9, the oxygen enters the flow control system after the pressure reduction of the oxygen is completed, meanwhile, the low pressure sensor 10 is used for monitoring the air pressure of the oxygen, if the oxygen is provided by the oxygen high pressure air cylinder 5, the oxygen is filtered by the filter 6 and then enters the first high pressure reducer 10 for first pressure reduction, laughing gas enters the pressure reducing valve 12 through the one-way valve 9 after the first pressure reduction, and the laughing gas enters the flow control system after the second pressure reduction of the oxygen is completed, and meanwhile, the high pressure sensor 8 is used for monitoring the air pressure of the laughing gas.

In one example, the first high pressure reducer 7 is 350kPa, the second high pressure reducer 11 is 300kPa, and the pressure reducing valve 12 is 250kPa. The filter 6, the high-pressure sensor 8, the first high-pressure reducer 7 and the one-way valve 9 in the second oxygen branch circuit can be integrated into an oxygen high-pressure reducer, and the filter 6, the high-pressure sensor 8, the second high-pressure reducer 11 and the one-way valve 9 can be integrated into a laughing gas high-pressure reducer. By integrating the components, the arrangement space of the components can be reduced.

In the gas supply system, under special conditions, when the laughing gas pipeline gas source 1, the air pipeline gas source 3 and the oxygen pipeline gas source 4 do not have gas output, the laughing gas high-pressure gas cylinder 2 and the oxygen high-pressure gas cylinder 5 can be opened to provide necessary gas supply for the rear end, so that the accident that the anesthesia machine cannot normally operate due to sudden stop of the pipeline gas source under the special conditions is avoided.

The low pressure sensor 10 can monitor the pressure of the laughing gas pipeline gas source 1, the air pipeline gas source 3 and the oxygen pipeline gas source 4 in real time, and an alarm prompt can be given when the pressure is too low or too high. Specifically, the filter 6 in the gas supply system can filter impurities in the gas source, the one-way valve 9 can prevent the gas from flowing back, the low pressure sensor 10 can monitor the pressure of the gas source, the gas source can give a warning when the pressure of the gas source is too low, the high pressure sensor 8 can monitor the pressure of the high pressure gas cylinder, the pressure reducing valve 12 can reduce the pressure (2.8 bar to 6 bar) of the gas source to 2.5bar, and a stable and safe gas supply environment is provided for the rear end.

The initial outlet of the oxygen high-pressure reducer is regulated to 350kPa, the effective pore space of the valve port is larger, the outlet pressure reduction amplitude is within 30kPa at the high flow rate of 120L/min, the stable pressure of the driving gas oxygen supply can be ensured, and the stable gas pressure is provided for the front end of the suction valve 28.

According to the embodiment of the application, the laughing gas assembly, the air assembly and the oxygen assembly are monitored through the pressure sensor, so that the arrangement space for monitoring the gas source pressure is reduced, the risk of gas leakage is reduced, the electronization of the gas source pressure monitoring is realized, and meanwhile, the high-pressure reducer can make the difference between the outlet pressure and the pressure of 0.3MPa in the initial adjustment not obvious, and the difference is within +/-0.03 MPa.

Further, the flow control system of the anesthesia machine comprises a first flow control branch connected with the laughing gas assembly or the air assembly, and a second flow control branch connected with the oxygen assembly and used for providing laughing gas and air or laughing gas and oxygen after flow control for the flow control system. Specifically, the first flow control branch is connected with the laughing gas assembly or the air assembly, and the second flow control branch is connected with the oxygen assembly.

The first flow control branch comprises an electromagnetic valve 15, a proportional valve 16 and an electronic flowmeter 17 which are respectively connected with the laughing gas assembly and the air assembly, so that the first flow control branch is connected with the laughing gas assembly or the air assembly by controlling the on-off of the electromagnetic valve 15. Specifically, referring to fig. 5, the first control branch includes 2 solenoid valves 15, one solenoid valve 15 is connected to the pressure reducing valve 12 in the laughing gas assembly, and the other electronic valve is connected to the pressure reducing valve 12 in the air assembly.

The second flow control branch comprises a solenoid valve 15 connected to the oxygen assembly, a proportional valve 16 and an electronic flow meter 17.

The air passage between the outlet of the electromagnetic valve 15 in the first flow control branch and the inlet of the proportional valve 16 is opposite, and the aperture of the air passage outlet of the electromagnetic valve 15 is larger than that of the air passage outlet of the proportional valve 16.

Specifically, the electromagnetic valve 15 of the flow control system is a normally closed electromagnetic valve, the gas circuit can be controlled to be opened and closed by switching on and off the gas circuit, the gas circuit is not opened when the gas circuit is switched off, the opening of the valve port can be controlled by supplying current to the proportional valve 16, so that the flow of gas can be controlled, the electronic flowmeter 17 can measure the flow of gas, the proportional valve 16 and the electronic flowmeter 17 are matched to realize closed-loop control of the flow output of the electronic flowmeter, the oxygen output by an oxygen component outputting a certain flow of the electronic flowmeter is taken as an example, after the oxygen flow is set to be a certain value, the electromagnetic valve 15 of the oxygen component is electrically opened, the proportional valve 16 of the oxygen component can be opened and the valve port is controlled according to a control curve of the flow and the current and the set value, the electronic flowmeter 17 can detect the oxygen flow value, if the detected flow value is inconsistent with the set value, the new current value can be obtained by the proportional valve 16, the valve port of the proportional valve 16 can be changed accordingly, the output oxygen flow can approach to the set value until the set value is consistent with the detected value of the electronic flowmeter 17, and the stable state of the oxygen flow output is reached. Further, the anesthesia machine according to the embodiment of the application further comprises a display screen, and the detection value of the electronic flowmeter 17 is displayed on the display screen of the anesthesia machine in real time.

In one example, the flow control system is a component consisting of 3 solenoid valves 15, 2 proportional valves 16, and 2 electronic flowmeters 17 integrated together.

Specifically, the flow control system is highly integrated, oxygen, air or laughing gas is respectively arranged on a display screen, the electric control flowmeter can automatically regulate and control, the flow of different types of gases is accurately output, the air passage between the electromagnetic valve 15 and the proportional valve 16 avoids the high integration of the vertical electric control flowmeter, oxygen, air or laughing gas is respectively arranged on the display screen, the electric control flowmeter can automatically regulate and control, the flow of different types of gases is accurately output, the air passage between the electromagnetic valve (NC) 15 and the proportional valve 16 avoids vertical intersection, the air passage between the outlet of the electromagnetic valve 15 and the inlet of the proportional valve 16 is opposite, the aperture is not smaller than the aperture required by the outlet of the proportional valve 16, the abnormal sound problem of the proportional valve is effectively avoided, the air passage between the outlet of the proportional valve 16 and the inlet of the electronic flowmeter 17 is reduced as much as possible, the aperture is approximately equal to the inner diameter of the inlet of the electronic flowmeter 17, and the grid-type steady flow device is required to be added at the inlet of the electronic flowmeter 17, thereby ensuring that the thermal electronic flowmeter 17 can accurately read the flow value of the gases, and the problem of small fluctuation of the display value during output flow is avoided. The air path between the outlet of the electromagnetic valve (NC) 15 and the inlet of the proportional valve 16 is opposite, the aperture is not smaller than the aperture required by the outlet of the proportional valve 16, the problem of abnormal sound of the proportional valve is effectively avoided, the air path between the outlet of the proportional valve 16 and the inlet of the electronic flowmeter 17 reduces the curved path as much as possible, the aperture is approximately equal to the inner diameter of the inlet of the electronic flowmeter 17, and a grid type flow stabilizer is needed to be added at the inlet of the electronic flowmeter 17, so that the thermal electronic flowmeter 17 can accurately read the gas flow value, and the problem of tiny jump of the display value during the output flow is avoided. The flow control system of the embodiment of the application carries out electric control adjustment on flow output, can accurately output flow, has high integration of the whole electric control flowmeter, ingenious gas circuit design avoids abnormal sound problems easily occurring in the electric control flowmeter, ensures the accuracy of the reading of the flow sensor in the electric control flowmeter in a limited space, and can realize high flow of oxygen and accurate output flow of 60L/min.

Further, the anesthetic gas delivery system according to an embodiment of the present application includes a bypass valve 23, an evaporator 24, and an auxiliary fresh gas outlet switch 36 for generating and delivering anesthetic gas. Specifically, referring to fig. 6, after the gas in the flow control system enters the anesthetic gas delivery system through the bypass valve 23, the anesthetic drug is gasified by the evaporator 24, and mixed after the gasification is completed, so as to generate anesthetic gas, and meanwhile, the generated anesthetic gas is selectively delivered to the loop system or output to other positions through the auxiliary fresh gas outlet switch 36. Wherein the outlet end of the auxiliary fresh gas outlet switch 36 (i.e. the inlet of fresh gas in the circuit system) is designed to be positioned close to the inhalation check valve, ensuring that the inhalation volume of the patient contains all fresh gas newly supplied during each inhalation, and increasing the concentration rising rate of anesthetic gas.

In one example, the bypass valve 23 is a two-position three-way valve, when the evaporator 24 is in a closed state, the electric control flowmeter 17 flows out to the loop system without passing through the evaporator 24, when the evaporator 24 is opened, a top column on the evaporator 24 can be inserted into the bypass valve 23, the electric control flowmeter is changed to enter the evaporator 24, the anesthetic mixed gas is output, a dial is arranged on the evaporator 24, and the concentration of the anesthetic gas can be accurately output by rotating the dial to different scale values.

Further, referring to fig. 7, the circuit system of the embodiment of the present application includes an inhalation branch, an exhalation branch, a paramagnetic oxygen sensor 44, an anesthetic gas concentration detection assembly 43, a manual control change-over switch 35, an automatic auxiliary breathing branch, a manual auxiliary breathing branch, and a heating assembly 46, and is connected to the anesthetic gas delivery system through the inhalation branch. The inhalation branch is connected with an auxiliary fresh gas outlet switch 36 for delivering anesthetic gas to a patient 42, the exhalation branch is used for delivering gas exhaled by the patient 42, a paramagnetic oxygen sensor 44 is respectively connected with the inhalation branch and the exhalation branch and used for detecting the oxygen concentration of the loop system, an anesthetic gas concentration detection component 43 is respectively connected with the inhalation branch and the exhalation branch and used for detecting the anesthetic gas concentration of the loop system, a manual control change-over switch 35 is used for selecting an automatic auxiliary breathing branch or a manual auxiliary breathing branch for auxiliary breathing, and a heating component 46 is arranged between the inhalation branch and the exhalation branch and used for heating gas in the loop system.

Wherein, the air pump on the paramagnetic oxygen sensor 44 during operation can realize the sampling function of bleeding, and the solenoid valve of paramagnetic oxygen module entry front end is when getting the electricity, paramagnetic oxygen module entry and atmosphere are led to, and the atmospheric gas of air pump extraction to realize the calibration function of oxygen concentration, the gas of the end of breathing in of air pump extraction patient 42 when losing the electricity realizes the detection function of the end oxygen concentration of breathing in of patient 42, and the scheme that the solenoid valve obtains the electricity calibration has reduced the risk that leads to oxygen concentration unable monitoring because of the solenoid valve trouble.

Specifically, referring further to FIG. 7, the suction branch includes a suction differential pressure assembly 41, a first airway pressure sensor 47, a second airway pressure sensor 60, a suction check valve 38, and a soda lime tank 37. Wherein, one end of the inspiration differential pressure component 41 is connected with the patient 42, the other end is connected with one end of the inspiration check valve 38, the first airway pressure sensor 47 and the second airway pressure sensor 60 are arranged between the inspiration differential pressure component and the inspiration check valve, the other end of the inspiration check valve 38 is connected with the auxiliary fresh gas outlet switch 36, the other end is connected with one end of the soda lime tank 37, and the other end of the soda lime tank 37 is respectively connected with the automatic auxiliary breathing branch and the manual auxiliary breathing branch.

The expiratory limb includes an expiratory pressure differential assembly 40, an expiratory pressure sensor 53 and an expiratory one-way valve 39.

One end of the expiratory pressure difference component 40 is connected with the patient 42, the other end is connected with the expiratory one-way valve 39, the expiratory pressure sensor 53 is arranged between the expiratory pressure difference component and the expiratory one-way valve 39, and the expiratory one-way valve 39 is respectively connected with the automatic auxiliary breathing branch and the manual auxiliary breathing branch.

Specifically, during anesthesia, anesthetic gas enters the soda lime canister 37 during inspiration, sequentially passes through the inspiration one-way valve 38 and the inspiration pressure difference assembly 41 to enter the patient's lungs, and during expiration, anesthetic gas enters the expiration pressure difference assembly 40 and passes through the expiration one-way valve 39. During the anesthetic process, the anesthetic gas concentration detection unit 43 anesthezes the gas concentration, and the paramagnetic oxygen sensor 44 detects the oxygen concentration.

Further, the inspiratory differential pressure assembly 41 includes a first solenoid valve 54, a second solenoid valve 55, and an inspiratory flow sensor 8, and the expiratory differential pressure assembly 40 includes a third solenoid valve 56, a fourth solenoid valve 57, and an expiratory flow sensor 59. Wherein the expiratory pressure sensor 53 provides a correct feedback signal for closed loop control of PEEP, thereby accurately controlling the end-tidal airway pressure of the patient 42.

Specifically, the inspiration differential pressure assembly 41 and the expiration differential pressure assembly 40 are essentially flow valves which are convenient for the differential pressure sensors to measure flow, the inspiration flow sensor 58 can calculate the inspiration flow by monitoring the pressure before and after the valve port of the inspiration differential pressure assembly 41 and convert the inspiration flow into the inspiration tidal volume to be displayed on a display screen, the expiration flow sensor 59 can calculate the expiration flow by monitoring the pressure before and after the valve port of the expiration differential pressure assembly 40 and convert the expiration flow into the expiration tidal volume to be displayed on the display screen, in order to ensure the accuracy of the tidal volume calculated by the inspiration flow sensor 58 and the expiration flow sensor 59, zero calibration is needed after a period of use, the electromagnetic valves 54, 55, 56 and 57 are two-position three-way valves, when the zero calibration function is started, the electromagnetic valves enable the inspiration flow sensor 58 and the expiration flow sensor 59 to be communicated with the atmosphere, the monitoring function of the expiration tidal volume is realized by monitoring the electromagnetic valves before and after the zero calibration is finished, the inspiration flow sensor 58 and the expiration flow sensor 59 are communicated with the airway, and the pressure sensor 58 in the anesthesia machine is used for acquiring the zero calibration flow of the expiration flow sensor 58 and the expiration flow sensor 59. The heating assembly 46 maintains the circuit system at a temperature that ensures proper temperature of the gas flowing into the patient and prevents the gas exhaled by the patient from condensing to liquid water in the circuit system, the inhalation check valve 38 ensures that the gas exhaled by the patient does not flow back during exhalation, thereby preventing the patient from repeatedly inhaling contaminated gas during the next respiratory cycle, the exhalation check valve 39 ensures that the gas exhaled during the previous respiratory cycle of the patient does not flow back into the patient during inhalation, and the soda lime tank 37 absorbs the carbon dioxide exhaled by the patient to prevent the carbon dioxide content of the circuit system from becoming too high.

Further, with continued reference to fig. 8, the automatic assisted breathing circuit includes a drive gas transfer switch 13, a pressure relief valve 26, a drive gas pressure sensor 52, a gas circuit module assembly, a gas barrier 29, an IP valve 30, an exhalation valve 32, an exhaust treatment device 48, and a coil 34 for automatic assisted breathing. The first end of the driving air switch 13 is connected with an oxygen component, the second end of the driving air switch is arranged in air, the third end of the driving air switch is connected with one end of the pressure reducing valve 26, the other end of the pressure reducing valve 26 is connected with the first end of the air passage module component, the second end of the air passage module component is connected with one end of the air resistor 29, the third end of the air passage module component is connected with the coil 34, the coil 34 is connected with the manual control switch 35, the driving air pressure sensor 52 is arranged between the pressure reducing valve 26 and the air passage module component, one end of the exhalation valve 32 is arranged between the air passage module component and the coil 34, the other end of the exhalation valve 32 is connected with the exhaust gas treatment device 48, the other end of the air resistor 29 is connected with one end of the IP valve 30, the other end of the IP valve 30 is arranged in air, and the manual auxiliary respiratory branch comprises a leather bag 45 and a pressure regulating limiting valve 33 for manual auxiliary respiratory. The IP valve 30 is an electromagnet type electromagnetic valve, and controls the opening size of the valve port by controlling the power supply of the coil, and the front end of the valve port is designed with a larger air capacity to prevent abnormal sound from occurring when the valve port is opened to a specific position.

Specifically, referring to fig. 13-14, the IP valve 30 according to the embodiment of the present application includes a PEEP gas control port 301, a first gas outlet 302, a second gas outlet 303, a gas inlet 304, a gas volume space 305, and a steady flow porous plate 306, where the gas volume space 305 is disposed at a valve port of the IP valve, and through the gas volume space, the problem of abnormal noise of the IP valve under specific conditions can be effectively prevented.

Specifically, the air path module assembly comprises an air suction valve 28, a filter 6, a flow sensor 51, a safety valve 31 and an electromagnetic valve 27, wherein one end of the air suction valve 28 is connected with the pressure reducing valve 26, the other end of the air suction valve is connected with one end of the filter 6, the other end of the filter 6 is connected with one end of the flow sensor 51, the other end of the flow sensor 51 is connected with a coil 34, the flow sensor 31 is arranged between the flow sensor 51 and the coil 34, one end of the electromagnetic valve 27 is connected with the pressure reducing valve 26, and the other end of the electromagnetic valve 27 is connected with one end of the air resistor 29. The flow sensor 51 and the inhalation valve 28 can realize a closed-loop control function of flow output, and can automatically calibrate the inhalation flow sensor 58 and the exhalation flow sensor 59, so that the problem of inaccurate tidal volume after long service time is avoided, and the calibration speed is high, so that the manual calibration is time-saving and labor-saving.

Specifically, the driving air conversion switch 13 is an electric air control two-position three-way valve, when the anesthesia machine control mode has an air source, the electromagnetic valve on the driving air conversion switch 13 is powered on, air drives the valve core position through the electromagnetic valve to move from the air inlet to the oxygen inlet and seal the oxygen inlet, the driving air is output to the air channel module assembly at the rear end, when the electromagnetic valve is powered off, the valve core of the driving air conversion switch 13 seals the air inlet due to the elasticity of the spring, and the driving air and the oxygen are output to the air channel module assembly at the rear end. Thus, the driving air pressure sensor 52 can detect the air pressure at the outlet of the pressure reducing valve (175 kPa) 26, so as to prevent the pressure at the outlet from being too low due to the failure of the pressure reducing valve (175 kPa) 26, and the too low pressure at the outlet of the pressure reducing valve (175 kPa) 26 directly influences the peak flow rate of the air suction valve 28 and the accuracy of the tidal volume, and an alarm prompt can be given when the pressure detected by the driving air pressure sensor 52 is too high or too low. The pressure reducing valve 26 reduces the pressure of the driving gas to 175kPa, the valve port of the air suction valve 28 is changed along with the change of the obtained current value, the filter 6 can filter impurities in the gas, the flow sensor 51 can detect the flow value output by the proportional valve 28 in real time, the safety valve 31 can release pressure to protect a patient when the airway pressure is too high, the electromagnetic valve 27 is a normally closed electromagnetic valve, the electromagnetic valve is opened when the electricity is obtained, the air passage is on, the electromagnetic valve is closed when the electricity is disconnected, the air passage is disconnected, the air resistance 29 is a constant air resistance, the IP valve 30 is essentially an electromagnetic valve, the opening of the IP valve can be realized by changing the current value, the exhalation valve 32 is a pneumatic spring mechanical valve, and the opening difficulty of the valve port is controlled along with the air pressure. when the anesthesia machine is set to the machine control mode, the electromagnetic valve 27 is powered on, the manual machine control change-over switch 35 is opened to the machine control state by the control gas flowing out of the electromagnetic valve 27, and the other gas flowing out of the electromagnetic valve 27 flows through the gas barrier 29, When the end expiratory pressure is set to be 0, the IP valve 30 is powered less and the valve port is opened greatly when the patient exhales, the air control pressure between the air resistor 29 and the air path of the IP valve 30 is negligible, the air in the lung of the patient is discharged to the waste gas treatment device 48 through the expiratory valve 32, in order to prevent the lung of the patient from being not stretched, a certain end expiratory pressure is set in the end expiratory state of the patient, the IP valve 30 is powered at a certain current value to enable the valve port to be opened to a position, the air control pressure between the air resistor 29 and the air path of the IP valve 30 is applied to the expiratory valve 32, a part of air remains at the end expiratory end of the lung of the patient to prop up the alveoli, the more the end expiratory positive pressure value is set, the air control pressure applied to the expiratory valve 32 between the air resistor 29 and the air path of the IP valve 30 is larger, and the air pressure in the lung of the patient is larger when the lung of the patient exhales. When a certain tidal volume is set in the mechanical control mode, the air suction valve 28 is opened to a certain position according to the valve port of the current-flow calibration curve, a certain flow gas is output and is monitored by the flow sensor 51, and when the set tidal volume value is inconsistent with the flow value monitored by the flow sensor 51, the system automatically changes the current of the air suction valve 28 so as to change the size of the valve port of the air suction valve, and then the output flow value is changed until the set tidal volume value is consistent with the output flow value monitored by the flow sensor 51.

Specifically, in manual assisted breathing, the patient is assisted by manually pinching the bellows 45.

Specifically, a vortex-shaped cavity is arranged in the coil pipe 34, the size of the cavity determines the upper limit value which can be achieved by the tidal volume, the pressure regulating limiting valve 33 is used in a manual mode, the upper limit value of the airway pressure can be regulated by regulating the pressure regulating limiting valve 33, when the airway pressure is larger than the set value of the pressure regulating limiting valve, the airway is decompressed, so that the end-expiratory airway pressure is limited, the patient is protected, and in the manual mode of the anesthesia machine, the breathing support can be provided for the patient without spontaneous breathing by pressing the leather bag 45 at a certain frequency. The coil 34 can reduce the gas discharge of anesthetic gas in the loop system, save the consumption of anesthetic, reduce the volume required for realizing the driving pneumatic function, and reduce the risk of air leakage.

Specifically, taking an example of providing respiratory support for a patient in the manual mode of the anesthesia machine, when the leather bag 45 is pinched by hand, anesthetic gas flows through the soda lime tank 37, carbon dioxide is filtered, the anesthetic gas flows into the patient through the inspiration one-way valve 38 and the inspiration pressure difference component 41, and when the leather bag is loosened by hand, the gas flows through the expiration one-way valve 39 from the patient into the leather bag 45, so that the function of providing respiratory support for the patient in the manual mode is realized.

Taking the anesthesia machine control mode as an example, when the manual control switch 35 is switched to the machine control position to provide the inspiration function support for the patient, the exhalation valve 32 is closed, the system provides a certain current for the inhalation valve 28 to enable the valve port to be opened to a certain position, gas flows out of the inhalation valve 28, flows through the filter 6 and the flow sensor 51 in sequence to form air pressure at the coil 34, the manual control change-over switch 35 is opened to further provide power for anesthetic gas in the inhalation branch, the anesthetic gas flows through the soda lime tank 37, the inhalation one-way valve 38 and the inhalation pressure difference assembly 41 to the patient, the output flow rate of the inhalation valve is related to the set tidal volume, the inhalation valve can realize closed-loop control of the output flow rate according to the setting of the tidal volume, when the patient exhales, the inhalation valve 28 is closed, the exhalation valve is opened, the gas in the patient sequentially flows through the exhalation pressure difference assembly 40 and the exhalation one-way valve 39, and simultaneously when exhales, the exhalation valve 32 is opened, the air pressure of the coil 34 is reduced, thereby the anesthetic gas loses driving force, and auxiliary breathing is completed.

Further, the anesthesia machine according to the embodiment of the present application further includes an oxygen therapy assembly and a safety oxygen assembly, as described with reference to FIG. 11

An oxygen therapy assembly is shown coupled to the oxygen assembly for providing supplemental supply of oxygen, the oxygen therapy assembly including a rotary regulated flow regulator valve 19 and a 60L flow meter (18). The flow output range of the oxygen therapy component is 0-60L/min, the 60L flowmeter 18 is a mechanical float flowmeter, the flow output is realized by rotating and adjusting the opening of the flow regulating valve 19, a certain value air resistance is designed at the front end of the 60L flowmeter 18, the risk that the actual flow is far more than 60L/min due to overlarge opening of the throttle valve is prevented, the threads of the flow regulating valve 19 are fine threads, the screw is a metal external thread, the internal thread is made of a plastic wear-resistant material, and the threads are tightly matched with the internal threads, so that the vertical jumping of a float of the 60L flowmeter 18 caused by the shaking of the screw under high flow is avoided, the risk of air leakage is also avoided, the inner diameter of an air outlet of the oxygen therapy device is not smaller than 6mm, and the inaccurate flow output caused by the influence of back pressure is prevented. The oxygen therapy device is a component consisting of a 60L flowmeter 18 and a flow rate regulating valve 19.

In one example, where the patient is physically weak but spontaneously breathing, breathing is more difficult for a person, and is prone to hypoxia, the oxygen therapy assembly may continue to provide oxygen to the patient's nose.

Referring to fig. 9, one end of the safety oxygen assembly is connected to the oxygen assembly, and the other end is connected to the flow control system for controlling the flow of oxygen when the anesthesia machine is powered down, and the safety oxygen assembly includes a safety oxygen transfer switch 50, a solenoid valve 21, a safety oxygen regulating valve 25 and a safety oxygen flowmeter 20, which are connected. If the anesthesia machine is in a starting state, the electromagnetic valve 21 is electrified, the safe oxygen path is not electrified, the electromagnetic valve 21 is powered off after the safe oxygen change-over switch 50 is pressed, the safe oxygen path is smooth, the safe oxygen regulating valve 25 is regulated to regulate the flow, the safe oxygen flowmeter 20 is a mechanical float type flowmeter, the flow value can be read by observing the position of a float, and the flow value detected by the electronic flowmeter 17 after the oxygen flowing out of the safe oxygen component flows through the electronic flowmeter 17 can be displayed on a display screen of the anesthesia machine. The safety oxygen component is a component composed of a safety oxygen flow meter 20, a solenoid valve 21, a safety oxygen regulating valve 25, and a safety oxygen change-over switch 50.

Further, the anesthesia machine according to the embodiment of the application further comprises a rapid oxygen supply assembly 22, wherein one end of the rapid oxygen supply assembly 22 is connected with the oxygen assembly, and the other end of the rapid oxygen supply assembly is connected with the anesthetic gas delivery system for diluting the anesthetic gas concentration. Before the airway intubation is carried out on a patient, the patient needs to be pre-filled with sufficient oxygen in a short time, the leather bag 45 can be filled with oxygen rapidly by pressing the rapid oxygen supply 22, the patient is manually ventilated, the pre-oxygenation time of the patient is greatly shortened, and when the operation is finished, the anesthetic gas in the air channel can be rapidly exhausted by pressing the rapid oxygen supply due to a large amount of anesthetic gas in the air channel, so that the patient is quickened to wake up.

Further, the anesthesia machine according to the embodiment of the application further comprises an auxiliary power air component 49, wherein one end of the auxiliary power air component 49 is connected with the oxygen component, and can provide power air for other medical instruments in the operating room, for example, can provide power air for the negative pressure aspirator, so that the negative pressure aspirator realizes the negative pressure aspiration function.

Further, when the anesthesia machine of the embodiment of the application works, because the pressure of the air source of the air supply system is relatively high, the air supplied by the air supply system can be used for supplying oxygen, air and laughing gas to the electric control flowmeter 17 after being depressurized by the depressurization valve 12, the electric control flowmeter 17 can accurately control the output of different types of air, the air output by the electric control flowmeter 17 can supply power for the anesthetic gas output by the evaporator 24, the anesthetic mixed gas can be accurately output by adjusting the evaporator 24, the anesthetic mixed gas output by the evaporator 24 can be controlled by the auxiliary fresh gas outlet switch 36 to be output to an inspiration branch or supplied to the outside of the equipment, the anesthesia machine is divided into a manual mode and a mechanical control mode by the manual control transfer switch 35, when the mechanical ventilation mode is the manual mode, the anesthesia machine can realize the mechanical control function according to a certain breathing frequency by a patient, when the anesthesia machine is powered by a power supply, the mechanical ventilation mode is the mechanical control function can be realized by the patient, the air supply system can supply driving oxygen or air to replace the manual control bag, the anesthetic mixed gas can be controlled by the auxiliary fresh gas outlet switch 36 to be output to the inspiration branch or supply the anesthetic mixed gas to the outside of the equipment, the anesthesia machine can be controlled by the manual control function by the manual control transfer switch 35, and when the manual ventilation is not can be realized by the manual control function of the manual control valve, and the manual ventilation function is realized by the manual control valve is realized, and the manual ventilation is realized by the manual control of the manual control valve is realized, and the manual ventilation function is realized by the manual control valve is provided by the manual control, and the manual control function is provided by the manual control valve.

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present application and are not limiting. Although the present application has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present application, which is intended to be covered by the appended claims.

Claims

1. An anesthesia machine, characterized in that it comprises: a gas supply system, a flow control system and a safety oxygen assembly connected to the gas supply system, and an anesthetic gas delivery system and a circuit system connected to the flow control system and the safety oxygen assembly;

The gas supply system includes a nitrous oxide assembly for providing nitrous oxide, an oxygen assembly for providing oxygen, and an air assembly for providing air. Each of the nitrous oxide assembly, the oxygen assembly, and the air assembly is equipped with a pressure sensor and a high-pressure regulator.

The flow control system includes a first flow control branch and a second flow control branch, used to provide nitrous oxide and air, or nitrous oxide and oxygen, to the anesthetic gas delivery system after flow control when energized.

One end of the safety oxygen component is connected to the oxygen component, and the other end is connected to the flow control system. It is used to control the oxygen flow when the anesthesia machine loses power. The safety oxygen component includes a safety oxygen changeover switch (50), a solenoid valve (21), a safety oxygen regulating valve (25), and a safety oxygen flow meter (20) connected to each other.

The anesthetic gas delivery system includes a bypass valve (23), an vaporizer (24), and an auxiliary fresh gas outlet switch (36) for generating and delivering anesthetic gas;

The circuit system includes an inspiratory branch, an expiratory branch, a paramagnetic oxygen sensor (44), an anesthetic gas concentration detection component (43), a manual control switch (35), an automatic assisted breathing branch, a manual assisted breathing branch, and a heating component (46). The circuit system is connected to the anesthetic gas delivery system through the inspiratory branch.

2. The anesthesia machine according to claim 1, characterized in that the nitrous oxide assembly includes a first nitrous oxide branch, a second nitrous oxide branch, and a pressure reducing valve (12); the first nitrous oxide branch includes a connected nitrous oxide pipeline gas source (1), a filter (6), a low-pressure sensor (10), and a one-way valve (9); the second nitrous oxide branch includes a connected nitrous oxide high-pressure cylinder (2), a filter (6), a high-pressure sensor (8), a second high-pressure pressure reducer (11), and a one-way valve (9); the one-way valve (9) of the first nitrous oxide branch and the one-way valve (9) of the second nitrous oxide branch are both connected to the pressure reducing valve (12);

The air assembly includes a connected air duct air source (3), a filter (6), a low-pressure sensor (10), a one-way valve (9), and a pressure reducing valve (12).

The oxygen assembly includes a first oxygen branch, a second oxygen branch, and the pressure reducing valve (12); the first oxygen branch includes a connected oxygen pipeline gas source (4), the filter (6), the low-pressure sensor (10), and the one-way valve (9); the second oxygen branch includes a connected high-pressure oxygen cylinder (5), the filter (6), the high-pressure sensor (8), the first high-pressure pressure reducer (7), and the one-way valve (9); the one-way valve (9) of the first oxygen branch and the one-way valve (9) of the second oxygen branch are both connected to the pressure reducing valve (12).

3. The anesthesia machine according to claim 1, wherein the first flow control branch is connected to the nitrous oxide assembly or the air assembly, and the second flow control branch is connected to the oxygen assembly;

The first flow control branch includes a solenoid valve (15), a proportional valve (16), and an electronic flow meter (17) respectively connected to the nitrous oxide assembly and the air assembly, so as to connect the first flow control branch to the nitrous oxide assembly or the air assembly by controlling the opening and closing of the solenoid valve (15).

The second flow control branch includes the solenoid valve (15), the proportional valve (16), and the electronic flow meter (17) connected to the oxygen assembly.

In the first flow control branch and the second flow control branch, the outlet of the solenoid valve (15) and the inlet of the proportional valve (16) are directly opposite each other, and the outlet diameter of the solenoid valve (15) is larger than the outlet diameter of the proportional valve (16).

4. The anesthesia machine according to claim 3, wherein the bypass valve (23) is connected to the first flow control branch and the second flow control branch respectively.

5. The anesthesia machine according to claim 1, wherein the inspiratory branch includes an inspiratory pressure differential assembly (41), a first airway pressure sensor (47), a second airway pressure sensor (60), an inspiratory one-way valve (38), and a soda lime container (37).

One end of the inspiratory pressure differential assembly (41) is connected to the patient (42), and the other end is connected to one end of the inspiratory one-way valve (38). The first airway pressure sensor (47) and the second airway pressure sensor (60) are disposed between the inspiratory pressure differential assembly (41) and the inspiratory one-way valve (38). The other end of the inspiratory one-way valve (38) is connected to the auxiliary fresh gas outlet switch (36) and the other end is connected to one end of the soda lime container (37). The other end of the soda lime container (37) is connected to the automatic assisted breathing branch and the manual assisted breathing branch, respectively.

The expiratory branch includes an expiratory pressure differential assembly (40), an expiratory pressure sensor (53), and an expiratory one-way valve (39).

One end of the expiratory pressure differential assembly (40) is connected to the patient (42), and the other end is connected to the expiratory one-way valve (39). The expiratory pressure sensor (53) is disposed between the expiratory pressure differential assembly (40) and the expiratory one-way valve (39). The expiratory one-way valve (39) is connected to the automatic assisted breathing branch and the manual assisted breathing branch, respectively.

The paramagnetic oxygen sensor (44) and the anesthetic gas concentration detection component (43) are respectively connected to the inspiratory branch and the expiratory branch.

6. The anesthesia machine according to claim 5, wherein the inspiratory pressure differential assembly (41) includes a first solenoid valve (54), a second solenoid valve (55) and an inspiratory flow sensor (58); and the expiratory pressure differential assembly (40) includes a third solenoid valve (56), a fourth solenoid valve (57) and an expiratory flow sensor (59).

7. The anesthesia machine according to claim 1, wherein the automatic assisted breathing branch includes a driving gas conversion switch (13) for selecting the driving gas, a pressure reducing valve (26), a driving gas pressure sensor (52), a gas path module assembly, a gas resistance (29), an IP valve (30), an exhalation valve (32), a waste gas treatment device (48), and a coil (34) for automatic assisted breathing;

The first end of the drive gas switching switch (13) is connected to the oxygen assembly, the second end is placed in the air, and the third end is connected to one end of the pressure reducing valve (26); the other end of the pressure reducing valve (26) is connected to the first end of the gas path module assembly, the second end of the gas path module assembly is connected to one end of the gas resistance (29), and the third end is connected to the coil (34); the coil (34) is connected to the manual control switching switch (35); the drive gas pressure sensor (52) is located between the pressure reducing valve (26) and the gas path module assembly; one end of the exhalation valve (32) is located between the gas path module assembly and the coil (34), and the other end is connected to the waste gas treatment device (48); the other end of the gas resistance (29) is connected to one end of the IP valve (30), and the other end of the IP valve (30) is placed in the air;

The manual assisted breathing circuit includes a cuff (45) and a pressure limiting valve (33) for artificial assisted breathing;

The IP valve has a gas-filled space at the front end of its valve port.

8. The anesthesia machine according to claim 7, characterized in that the gas path module assembly includes an inhalation valve (28), a filter (6), a flow sensor (51), a safety valve (31), and a solenoid valve (27); one end of the inhalation valve (28) is connected to the pressure reducing valve (26), and the other end is connected to one end of the filter (6), the other end of the filter (6) is connected to one end of the flow sensor (51), and the other end of the flow sensor (51) is connected to the coil (34); the flow sensor (31) is disposed between the flow sensor (51) and the coil (34); one end of the solenoid valve (27) is connected to the pressure reducing valve (26), and the other end is connected to one end of the gas resistance (29).

9. The anesthesia machine according to claim 1, characterized in that it further includes an oxygen therapy component and a safety oxygen component, the oxygen therapy component being connected to the oxygen component for providing auxiliary oxygen supply, the oxygen therapy component including a rotary flow regulating valve (19) and a 60L flow meter (18).

10. The anesthesia machine according to claim 1, characterized in that it further includes a rapid oxygen supply component (22), one end of which is connected to the oxygen component and the other end is connected to the anesthetic gas delivery system for diluting the concentration of anesthetic gas.