WO2024255910A1 - Anesthesia machine - Google Patents

Abstract

An anesthesia machine, comprising a first fresh gas branch, a second fresh gas branch, a breathing circuit, a driving gas branch, a gas pressurizing apparatus, and an anesthetic delivery apparatus. The first fresh gas branch and the second fresh gas branch are communicated with the anesthetic delivery apparatus. The first fresh gas branch is used for providing oxygen and/or nitrous oxide. The second fresh gas branch is used for providing air. The anesthetic delivery apparatus is configured to mix an anesthetic with the gas provided by the first fresh gas branch and/or mix an anesthetic with the air provided by the second fresh gas branch to acquire mixed gas, and deliver the mixed gas into the breathing circuit. The breathing circuit is used for receiving the mixed gas output by the anesthetic delivery apparatus. The driving gas branch is used for driving the mixed gas in the breathing circuit to be delivered to a patient. The gas pressurizing apparatus is configured to pressurize air entering the second fresh gas branch, so that the second fresh gas branch provides pressurized air by means of an air outlet.

Description

Anesthesia Machine Technical Field

The present invention relates to the field of medical devices, and in particular to an anesthesia machine.

Background Art

Existing anesthesia machines usually use external air compressors or external high-pressure gas sources to supply fresh gas, which not only increases the cost of using the anesthesia machine, but also generates a lot of noise during operation, affecting the patient's rest.

Summary of the invention

The present invention provides an anesthesia machine, which can provide fresh gas for the anesthesia machine through a gas pressurizing device built into the anesthesia machine, thereby improving the use convenience of the anesthesia machine.

The present invention also provides an anesthesia machine, comprising:

A first fresh gas branch for providing oxygen and/or laughing gas;

A second fresh gas branch for providing air;

an anesthetic delivery device, the first fresh gas branch and the second fresh gas branch being in communication with the anesthetic delivery device, the anesthetic delivery device being used for mixing anesthetic with gas provided by the first fresh gas branch and/or mixing anesthetic with air provided by the second fresh gas branch to obtain a mixed gas, and delivering the mixed gas to a breathing circuit;

a breathing circuit, for receiving the mixed gas output by the anesthetic delivery device; and

A driving gas branch, used for driving the mixed gas in the breathing circuit to be delivered to the patient, so as to provide anesthesia breathing support for the patient;

Among them, the anesthesia machine also includes a gas pressurizing device built into the anesthesia machine, the second fresh gas branch has an air inlet and an air outlet, and the gas pressurizing device is arranged between the air inlet and the air outlet, and is used to pressurize the air entering the second fresh gas branch through the air inlet, so that the second fresh gas branch provides pressurized air through the air outlet.

The technical solution provided by the embodiment of the present application may include the following beneficial effects: the anesthesia machine of the present application is equipped with a built-in gas pressurizing device, which can pressurize the air entering the second fresh gas branch to obtain pressurized air, without the need to use an external high-pressure gas source, thereby reducing the use cost of the anesthesia machine.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

FIG1 is a block diagram of a partial structure of an anesthesia machine according to an embodiment of the present application;

FIG2 is a schematic diagram of a second fresh gas branch circuit according to an embodiment of the present application;

FIG3 is a schematic diagram of a partial structure of an anesthesia machine according to an embodiment of the present application;

FIG4 is a schematic diagram of the structure of a gas pressurizing device according to an embodiment of the present application;

FIG5 is a schematic diagram of a gas pressurizing device provided in an embodiment of the present application at another angle;

FIG6 is a schematic diagram of the connection between the first filter and the first muffler provided in one embodiment of the present application;

FIG. 7 is a cross-sectional schematic diagram of a first filter and a first muffler according to an embodiment of the present application.

Description of reference numerals:

100, first fresh gas branch; 200, second fresh gas branch; 201, normally closed pressure relief branch; 300, anesthetic delivery device; 400, driving gas branch; 500, breathing circuit;

10. Gas pressurizing device; 11. Pump body; 12. Fixing plate; 13. Support member; 131. Support plate; 132. Base; 133. First shock absorbing member; 14. Second shock absorbing member; 15. Limiting member; 20. Normally closed overflow valve; 30. First filter; 31. First connector; 32. First filter port; 40. First muffler; 41. Gas output port; 42. Gas input port; 50. Second muffler; 60. Soft rubber seal; 61. Soft rubber interface; 70. First pressure sensor; 80. Second filter; 90. One-way valve.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

It should also be understood that the terms used in this specification are only for the purpose of describing specific In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

As shown in FIGS. 1 to 7 , the present application provides an anesthesia machine, including a first fresh gas branch 100, a second fresh gas branch 200, a breathing circuit 500, a driving gas branch 400 and an anesthetic delivery device 300, wherein the first fresh gas branch 100 and the second fresh gas branch 200 are connected to the anesthetic delivery device 300, the first fresh gas branch 100 is used to provide oxygen and/or nitrous oxide, the second fresh gas branch 200 is used to provide air, and the anesthetic delivery device 300 is used to mix the anesthetic with the gas provided by the first fresh gas branch 100 and/or the anesthetic with the air provided by the second fresh gas branch 200 to obtain a mixed gas, and deliver the mixed gas to the breathing circuit 500. The breathing circuit 500 is used to receive the mixed gas output by the anesthetic delivery device 300, and the driving gas branch 400 is used to drive the mixed gas in the breathing circuit 500 to be delivered to the patient, so as to provide anesthesia breathing support for the patient.

In this embodiment, the anesthesia machine also includes a gas pressurizing device 10 built into the anesthesia machine. The second fresh gas branch 200 has an air inlet and an air outlet. The gas pressurizing device 10 is arranged between the air inlet and the air outlet, and is used to pressurize the air entering the second fresh gas branch 200 through the air inlet, so that the second fresh gas branch 200 provides pressurized air through the air outlet, which is used to provide air with a certain pressure to the patient. By providing air through the built-in gas pressurizing device 10, the anesthesia machine of the present application does not need to supply air through an external high-pressure gas source, and the use cost is lower. The first fresh gas branch 100 also includes an air inlet and an air outlet. The air inlet of the first fresh gas branch 100 can be connected to a high-pressure oxygen source. The high-pressure oxygen source can be, for example, a high-pressure oxygen cylinder or a wall gas in a hospital.

In an optional embodiment, as shown in FIG. 2 and FIG. 3 , the second fresh gas branch 200 is provided A normally closed pressure relief branch 201 is provided, and the normally closed pressure relief branch 201 is connected to the output port of the gas pressurizing device 10. If the air inlet and the air outlet of the second fresh gas branch 200 are used as the main route, the normally closed pressure relief branch 201 is connected to the main route in a bypass manner. Among them, a pressure controller is installed on the normally closed pressure relief branch 201, which is used to control the air pressure of the second fresh gas branch 200 by adjusting the on-off state of the normally closed pressure relief branch 201. When a system failure occurs, the normally closed pressure relief branch 201 is in a conducting state, that is, the air can flow out of the branch at this time, which can prevent the excessive pressure caused by the system failure, play a role in protecting the pump body and stabilizing the rear-end output pressure; when there is no system failure, the normally closed pressure relief branch 201 is in a cut-off state, that is, the air will not flow out at this time, which can significantly reduce the noise compared with the normally open design of the prior art.

Exemplarily, the pressure controller is used to control the conduction or cutoff of the normally closed pressure relief branch 201, so that when the air pressure in the second fresh gas branch 200 is higher than the safe value for normal operation of the system, the pressure controller opens to divert the air in the second fresh gas branch 200 to the external environment, thereby ensuring that the air pressure in the second fresh gas branch 200 does not exceed a certain value, thereby ensuring the safe operation of the anesthesia machine.

In an optional embodiment, as shown in FIG. 2 and FIG. 3 , the pressure controller includes a normally closed relief valve 20, which is used to guide the normally closed pressure relief branch 201 when the air pressure of the second fresh gas branch 200 is higher than the working pressure, so that part of the gas or all of the gas on the second fresh gas branch 200 can flow out from the normally closed pressure relief branch 201. The normally closed relief valve 20 can form a double insurance device with the first pressure sensor 70 in the second fresh gas branch 200. In actual operation, the first pressure sensor 70 can detect the air pressure in the second fresh gas branch 200 in real time, so that the anesthesia machine controls the gas pressurizing device 10 according to the detection result of the air pressure, and the normally closed relief valve 20 can set an additional overflow pressure within the pressure range detected by the first pressure sensor 70 or set the overflow pressure when the first pressure sensor 70 has an operating failure, thereby ensuring that the second fresh gas branch 200 can output a stable air pressure and gas volume, so that the anesthetic delivery device 300 is safer and more stable during the anesthesia process. For example, the normally closed relief valve 20 is a mechanical valve. When the air pressure in the second fresh gas branch 200 reaches a certain level, the normally closed relief valve 20 can open the valve under the pressure of the air to achieve pressure relief. The mechanical valve can better avoid electrical control failures and truly ensure the operating safety of the anesthesia machine.

In an optional embodiment, the pressure controller includes a switch valve and a second pressure sensor. The switch valve can also be used to control the on-off of the normally closed pressure relief branch 201. The anesthesia machine controls the on-off of the switch valve according to the air pressure of the normally closed pressure relief branch 201 output by the second pressure sensor, so that the air on the second fresh gas branch 200 can flow out of the normally closed pressure relief branch 201 when the switch valve is opened. The second pressure sensor can also form a double insurance device with the pressure sensor 70. The two pressure sensors form a double detection to improve the safety of the anesthesia machine.

Exemplarily, when the gas pressurizing device 10 is working, the gas pressurizing device 10 inhales air from the atmosphere through the air inlet and provides pressurized air through the air outlet of the second fresh gas branch 200. Since the second fresh gas branch 200 is provided with a normally closed pressure relief branch 201, the gas pressurized by the gas pressurizing device 10 is divided into two air flows, one of which is input to the anesthetic delivery device 300 through the air outlet, and the other flows through the normally closed pressure relief branch 201. The normally closed pressure relief branch 201 is connected with a normally closed overflow valve 20 or a switch valve, so that when the air pressure inside the second fresh gas branch 200 is too high, the normally closed overflow valve 20 or the switch valve can guide the normally closed pressure relief branch 201 and discharge excess air from the pressure relief branch, so that the gas pressurizing device 10 can provide air to the patient according to a predetermined air pressure.

The normally closed relief valve 20 is in a normally closed state when the air pressure inside the second fresh gas branch 200 is normal, that is, the normally closed pressure relief branch 201 is disconnected from the external environment, and when the air pressure inside the second fresh gas branch 200 is too high, the normally closed relief valve 20 opens openings of different sizes according to the air pressure, so that the air in the second fresh gas branch 200 can be discharged through the openings of the normally closed relief valve 20 of different sizes, thereby realizing the overpressure relief function of the normally closed relief valve 20. The switch valve can also ensure that the air pressure inside the second fresh gas branch 200 will not be overloaded. When the second pressure sensor detects that the air pressure in the second fresh gas branch 200 is too high, the switch valve is controlled to open the normally closed pressure relief branch 201, so that the air on the second fresh gas branch 200 can flow out from the normally closed pressure relief branch 201.

In an optional embodiment, as shown in FIG. 2 and FIG. 3 , the second fresh gas branch 200 includes a first filter 30 and a first muffler 40. The first filter 30 is disposed between the air inlet and the gas pressurizing device 10, and is mainly used to filter the air entering the gas pressurizing device 10, thereby preventing impurities in the air from polluting the gas pressurizing device 10, thereby helping to ensure the service life of the gas pressurizing device 10. The first muffler 40 is disposed between the first filter 30 and the gas pressurizing device 10, and is used to eliminate the noise generated by the air entering the gas pressurizing device 10 from the first filter 30, and to avoid the noise generated by the gas pressurizing device 10 due to excessive pressure during the pressurization process.

In this embodiment, the connection portion between the first filter 30 and the first muffler 40 is sealed by a flexible member, such as a soft rubber seal, to achieve a better sealing effect and reduce the noise generated when air enters the gas pressurizing device 10 .

Exemplarily, as shown in FIG6 and FIG7 , the second fresh gas branch 200 includes a soft glue seal 60 , and the soft glue seal 60 has a soft glue receiving groove and a soft glue interface 61 communicating with the soft glue receiving groove. The first filter 30 is provided with a first connector 31, and the first muffler 40 is provided with a gas input port 42 and a gas output port 41. The gas output port 41 is a tubular connector, and at least part of the first muffler 40 is accommodated in the soft glue receiving groove. When the first muffler 40 is accommodated in the soft glue receiving groove, the gas output port 41 extends out of the soft glue receiving groove and is connected to the gas pressurizing device 10, the gas input port 42 faces the soft glue interface 61 and is connected to the soft glue interface 61, and the first connector 31 is sealed and connected to the soft glue interface 61. The air enters through the first filter port 32 of the first filter 30, and then flows to the first muffler 40 through the connection between the first connector 31 and the gas input port 42, and the first muffler 40 then inputs the air to be pressurized to the gas pressurizing device 10 through the gas output port 41.

In an optional embodiment, the soft rubber seal 60 is a silicone sleeve, the first muffler 40 is sealed and connected in the soft rubber containing groove, the gas output port 41 extends out of the soft rubber containing groove and is connected to the gas pressurizing device 10 through a pipeline, and the gas input port 42 is sealed and connected to the first connector 31 through a soft rubber interface 61 to ensure the sealing between the first connector 31 and the gas input port 42, so that the first connector 31 can be completely sealed with the gas input port 42, with a simple structure and easy installation.

In an optional embodiment, the first filter 30 is a HEPA filter, and the first muffler 40 is provided with a labyrinth structure. After being filtered by the HEPA filter, the air enters the gas pressurizing device 10 through the labyrinth structure under the action of the negative pressure of the gas pressurizing device 10, thereby reducing the noise generated by the excessive negative pressure of the air. The narrow and tortuous labyrinth structure can eliminate the noise generated when the air flows, and the HEPA filter can prevent impurities in the air from polluting the gas pressurizing device 10.

In an optional embodiment, as shown in FIG. 2 , the second fresh gas branch 200 further includes a second filter 80 , which is disposed between the gas outlet and the gas pressurizing device 10 , and is used to filter the air output by the gas pressurizing device 10 to ensure the quality of air input into the anesthetic delivery device 300 .

In an optional embodiment, the anesthesia machine includes a processor, and the second fresh gas branch 200 further includes a first valve and a first pressure sensor 70. The first valve is arranged at the gas outlet of the second fresh gas branch, and is used to support the user to adjust the air flow of the second fresh gas branch 200. The first valve can be, for example, a needle valve. The first pressure sensor 70 is arranged between the output port of the gas pressurizing device 10 and the first valve, and is used to monitor the air pressure of the second fresh gas branch 200. The processor is used to adjust the output capacity of the gas pressurizing device 10 according to the air pressure output by the first pressure sensor 70, so that the gas pressurizing device 10 can provide gas to the patient according to the pre-user demand.

The output of the first pressure sensor 70 can be used as the opening characterization quantity of the first valve. The processor can adjust the air flow output by the gas pressurizing device 10 according to the change of the opening characterization quantity; for example, The processor can adjust the speed of the gas pressurizing device 10 according to the change of the opening characteristic quantity of the first valve. When the air pressure detected by the first pressure sensor 70 becomes smaller, the processor increases the speed of the gas pressurizing device 10; when the air pressure detected by the first pressure sensor 70 becomes larger, the processor decreases the speed of the gas pressurizing device 10.

The value of the air pressure monitored by the first pressure sensor 70 is negatively correlated with the opening of the first valve, so that the gas pressurizing device 10 can output accurate air flow to the anesthetic delivery device 300. Negative correlation means that when the air flow of the second fresh gas branch 200 is adjusted from small to large, the pressure at the output end of the air pressure pressurizing device 10 will decrease; when the air flow of the second fresh gas branch 200 is adjusted from large to small, the pressure at the output end of the air pressure pressurizing device 10 will increase. That is, the processor can sense the user's adjustment of the air flow through the change in the air pressure at the output end of the air pressure pressurizing device 10. When the processor detects that the air flow needs to increase, it can increase the speed of the gas pressurizing device 10 to meet the requirement; when it detects that the air flow needs to decrease, it can reduce the speed of the gas pressurizing device 10.

In an optional embodiment, the driving gas branch 400 includes an electronically controlled driving module, which is built into the anesthesia machine and is used to provide a driving gas flow, so that the driving gas branch 400 can push the mixed gas in the breathing circuit 500 to the patient. After adopting the above technical solution, since the electronically controlled driving module is built into the anesthesia machine, the driving gas can be directly generated without consuming an additional external gas source, and the use cost is lower.

In an optional embodiment, the anesthesia machine also includes a body column, and the electronically controlled drive module and the gas pressurizing device 10 are both built into the body column. The electronically controlled drive module is used to provide a driving airflow so that the driving gas branch 400 can push the mixed gas in the breathing circuit 500 to the patient; and the gas pressurizing device 10 can output air as fresh gas to the anesthetic delivery device 300.

In an optional embodiment, the electronically controlled driving module includes a voice coil motor and a turbine box, and the voice coil motor cooperates with the turbine box to control the flow rate of the driving gas flowing out through the driving gas branch 400 .

In a specific application, the breathing circuit 500 has a _CO2 absorber and a bellows. When the patient inhales, the turbine box inputs driving gas into the bellows, compresses the folding bag in the bellows, and pushes the gas stored in the folding bag and the fresh gas of the first fresh gas branch and the second fresh gas branch received by the anesthesia machine to the breathing circuit 500, and finally delivered to the patient.

When the patient exhales, the patient's exhaled gas is transported into the folded bag and pushes up the folded bag. When the folded bag is pushed up to the top of the bellows, if there is still exhaled gas entering the folded bag, the excess exhaled gas will be discharged. The flow rate of the driving gas can be controlled by the turbine speed of the turbine box and the first voice coil motor. Collaborative control enables more efficient and accurate control of the flow rate of the driving gas.

In an optional embodiment, the gas pressurizing device 10 includes a shell and a gas pump assembly. A accommodating cavity is formed in the shell, and the gas pump assembly is arranged in the accommodating cavity. The shell is installed in the anesthesia machine to achieve fixed installation of the gas pump assembly. At the same time, the gas pump assembly can also be protected to avoid safety accidents caused by collision, and the structural distribution is reasonable.

Exemplarily, as shown in Figures 3 to 5, the gas pump assembly includes a pump body 11, a fixed plate 12, a first shock absorber 133 and a support member 13 connected to the outer shell. The pump body 11 is connected to the support member 13 through the fixed plate 12, and the fixed plate 12 and the support member 13 are floatingly connected. The first shock absorber 133 is arranged between the fixed plate 12 and the support member 13 to achieve a shock-absorbing effect and also reduce the noise generated when the pump body 11 is working.

In an optional embodiment, the gas pump assembly further includes a limiter 15, through which the fixed plate 12 is floatingly connected to the support member 13, and the first shock absorber 133 is arranged between the fixed plate 12 and the support member 13, that is, the limiter 15 can be used to limit the movable position of the fixed plate 12 relative to the support member 13, so as to prevent the first shock absorber from falling off and breaking in extreme cases. The support member 13 is provided with an opening through which the limiter 15 is passed. The first end of the limiter 15 is connected to the fixed plate 12, and the second end is passed through the side of the support member 13 facing away from the fixed plate 12, and the size of the second end of the limiter is designed to ensure that it will not fall out of the opening of the support member 13.

In an optional embodiment, the support member 13 includes a base 132 connected to the shell, and the first shock absorber 133 includes at least four buffer silicones, which are arranged between the fixing plate 12 and the base 132 and are arranged at intervals on the base 132 to play a buffering and supporting role.

In an optional embodiment, the support member 13 also includes a support plate 131 and a second shock absorber 14. The support plate 131 is connected to the fixed plate 12 and is arranged between the fixed plate 12 and the base 132. The second shock absorber 14 is arranged between the support plate 131 and the fixed plate 12, which can further prevent the pump body 11 from colliding with the fixed plate 12 due to vibration during operation, thereby improving the service life of the pump body 11 and reducing the working noise of the pump body 11.

As shown in Figures 3 to 5, the limiting member 15 is two limiting columns, and the second shock-absorbing member 14 includes four shock-absorbing springs, which are arranged at intervals at the four corners where the fixed plate 12 and the support plate 131 are connected, and the two limiting columns are connected in the middle of the fixed plate 12 and the support plate 131.

In an optional embodiment, the second fresh gas branch 200 further includes a muffler structure, a filter structure and a one-way valve 90, wherein the pressure control element, the muffler structure, the filter structure, the one-way valve 90 and the pressure sensor are all arranged on the outside of the housing, and the one-way valve 90 is mainly used to limit the pressure in the second fresh gas branch 200. The direction of air flow to prevent air backflow.

In this embodiment, the muffler structure includes the first muffler 40, the filter structure includes the first filter 30, and the first muffler 40 is installed on the housing through the first filter 30. The first filter 30 is provided with a first connector 31, and the first muffler 40 is provided with a gas input port 42, which is sealed and connected to the first connector 31.

Specifically, the gas input port 42 is sealed and connected to the first connector 31 through a soft rubber seal 60, wherein the soft rubber seal 60 has a soft rubber containing groove and a soft rubber interface 61 connected to the soft rubber containing groove, the first filter 30 is provided with a first connector 31, and the first muffler 40 is provided with a gas input port 42 and a gas output port 41, the gas output port 41 is a tubular connector, when the first muffler 40 is accommodated in the soft rubber containing groove, the gas output port 41 extends out of the soft rubber containing groove and is connected to the gas pressurizing device 10, the gas input port 42 faces the soft rubber interface 61 and is connected to the soft rubber interface 61, the first connector 31 is sealed and connected in the soft rubber interface 61, so that the gas can enter through the first filter port 32 of the first filter 30, and then flow to the first muffler 40 through the connection between the first connector 31 and the gas input port 42, and the first muffler 40 then inputs the air to be pressurized to the gas pressurizing device 10 through the gas output port 41.

In an optional embodiment, the soft rubber seal 60 is a silicone sleeve, the first muffler 40 is sealed and connected in the soft rubber containing groove, the gas output port 41 extends out of the soft rubber containing groove and is connected to the gas pressurizing device 10 through a pipeline, and the gas input port 42 is sealed and connected to the first connector 31 through a soft rubber interface 61 to ensure the sealing between the first connector 31 and the gas input port 42, so that the first connector 31 can be completely sealed with the gas input port 42, with a simple structure and easy installation.

In an optional embodiment, the muffler structure further includes a second muffler 50 , which is disposed at the end of the normally closed relief valve 20 to eliminate the noise generated by the airflow when the normally closed pressure relief branch 201 overflows.

In an optional embodiment, the operating pressure range of the gas pressurizing device 10 is less than 400 KPa, the required air pressure is not high, and the air consumption is small. The air entering the second fresh gas branch 200 through the air inlet can be effectively pressurized, so that the second fresh gas branch 200 provides pressurized air through the air outlet. At the same time, the working noise and vibration are small, and even a vibration-free effect can be achieved through the first shock absorber 133 and the second shock absorber 14. The airflow noise of the second fresh gas branch 200 can be processed by the first muffler 40, which can adapt to different working environments and will not affect the patient.

In the description of this application, it should be noted that, unless otherwise clearly specified or limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, they can be fixedly connected or Removable connection, or integral connection. Can be mechanical connection, or electrical connection. Can be directly connected, or indirectly connected through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and/or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and/or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can be aware of the application of other processes and/or the use of other materials.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims (17)

An anesthesia machine, characterized by comprising: A first fresh gas branch for providing oxygen and/or laughing gas; A second fresh gas branch for providing air; an anesthetic delivery device, the first fresh gas branch and the second fresh gas branch being in communication with the anesthetic delivery device, the anesthetic delivery device being used for mixing anesthetic with gas provided by the first fresh gas branch and/or mixing anesthetic with air provided by the second fresh gas branch to obtain a mixed gas, and delivering the mixed gas to a breathing circuit; a breathing circuit, for receiving the mixed gas output by the anesthetic delivery device; and A driving gas branch, used for driving the mixed gas in the breathing circuit to be delivered to the patient, so as to provide anesthesia breathing support for the patient; Among them, the anesthesia machine also includes a gas pressurizing device built into the anesthesia machine, the second fresh gas branch has an air inlet and an air outlet, and the gas pressurizing device is arranged between the air inlet and the air outlet, and is used to pressurize the air entering the second fresh gas branch through the air inlet, so that the second fresh gas branch provides pressurized air through the air outlet. The anesthesia machine according to claim 1 is characterized in that the second fresh gas branch is provided with a normally closed pressure relief branch, the normally closed pressure relief branch is connected to the output port of the gas pressurizing device, and a pressure controller is installed on the normally closed pressure relief branch for controlling the air pressure of the second fresh gas branch by adjusting the on-off state of the normally closed pressure relief branch. The anesthesia machine according to claim 2 is characterized in that the pressure controller includes a normally closed relief valve, which is used to open the normally closed pressure relief branch when the air pressure of the second fresh gas branch is higher than the working pressure, so that the air on the second fresh gas branch can flow out from the normally closed pressure relief branch. The anesthesia machine according to claim 2 is characterized in that the pressure controller includes a switch valve and a second pressure sensor, and the anesthesia machine controls the on-off of the switch valve according to the air pressure at the output port of the gas pressurizing device output by the second pressure sensor, so that the air on the second fresh gas branch can flow out from the normally closed pressure relief branch. The anesthesia machine according to claim 1, characterized in that the second fresh gas branch comprises a first filter arranged between the air inlet and the gas pressurizing device, and a first muffler arranged between the first filter and the gas pressurizing device; A connecting portion of the muffler is sealed by a flexible member. The anesthesia machine according to claim 5 is characterized in that the first filter is a HEPA filter, the first muffler is provided with a labyrinth structure, and the air is filtered by the HEPA filter and then enters the gas pressurizing device through the labyrinth structure under the negative pressure of the gas pressurizing device. The anesthesia machine according to claim 1 is characterized in that the second fresh gas branch includes a second filter arranged between the gas outlet and the gas pressurizing device, which is used to filter the air output by the gas pressurizing device. The anesthesia machine according to claim 1, further comprising: a first pressure sensor disposed between the gas outlet and an output port of the gas pressurizing device, for monitoring the air pressure of the second fresh gas branch; and The processor is used to adjust the output capacity of the gas pressurizing device according to the air pressure output by the pressure sensor. The anesthesia machine according to claim 8 is characterized in that the second fresh gas branch also includes a first valve, and the first valve is used to adjust the air flow of the second fresh gas branch where the gas pressurization device is located; the first pressure sensor is arranged between the output port of the gas pressurization device and the first valve, and the change of the air pressure monitored by the pressure sensor is negatively correlated with the opening size of the first valve. The anesthesia machine according to claim 1 is characterized in that the driving gas branch includes an electronically controlled driving module, which is built into the anesthesia machine and is used to provide driving gas to push the mixed gas in the breathing circuit to the patient through the driving gas. The anesthesia machine according to claim 10 is characterized in that the anesthesia machine also includes a body column, and the electronically controlled drive module and the air pressure pressurizing device are both built into the body column. The anesthesia machine according to claim 10, characterized in that the electronically controlled driving module includes a voice coil motor, and the voice coil motor cooperates with the electronically controlled driving module to control the flow rate of the driving gas flowing out through the driving gas branch. The anesthesia machine according to claim 1, characterized in that the gas pressurizing device comprises a housing and a gas pump assembly, a receiving cavity is formed in the housing, and the gas pump assembly is arranged in the receiving cavity; The gas pump assembly includes a pump body, a fixing plate, a first shock absorbing member, a limiting member and a The pump body is connected to the support member through the fixing plate, and the first shock absorbing member is arranged between the fixing plate and the support member; the fixing plate is floatingly connected to the support member through the limiting member. The anesthesia machine according to claim 13, characterized in that the support member includes a base connected to the housing, the first shock absorbing member includes a plurality of buffer silica gels, the buffer silica gels are arranged between the fixing plate and the base, and are arranged on the base at intervals; Furthermore, the support member also includes a support plate and a second shock absorbing member, wherein the support plate is connected to the fixing plate and is arranged between the fixing plate and the base, and the second shock absorbing member is arranged between the support plate and the fixing plate. The anesthesia machine according to claim 13 is characterized in that the second fresh gas branch also includes a pressure control component, a silencer structure, a filter structure, a one-way valve and a pressure sensor, and the pressure control component, the silencer structure, the filter structure, the one-way valve and the pressure sensor are all arranged on the outside of the shell. The anesthesia machine according to claim 15 is characterized in that the silencer structure includes a first silencer, the filtering structure includes a first filter, the first silencer is installed on the housing through the first filter, the first filter is provided with a first connector, the first silencer is installed in a soft rubber seal, the first connector is connected to the soft rubber seal and is connected to the gas input port of the first silencer, and the gas output port of the first silencer is connected to the pump body. The anesthesia machine according to any one of claims 1 to 16, characterized in that the gas pressurizing device operates in a pressure range of less than 400 KPa.