Fully automatic proportioning device and method for nitric oxide inhalation

Abstract

The present invention provides a fully automatic proportioning device for nitric oxide inhalation, belonging to the technical field of proportioning and mixing equipment. The fully automatic proportioning device for nitric oxide inhalation comprises a first raw gas pipeline, a second raw gas pipeline, a mixed gas pipeline, a mixed gas storage component, a gas distribution valve group, a bus assembly and a control module. The fully automatic proportioning method for nitric oxide inhalation adopts the above-mentioned fully automatic proportioning device for nitric oxide inhalation. The present invention uses the control module to automatically proportion and mix the first raw gas and the second raw gas according to the weight of the first raw gas and the second raw gas filled into the mixed gas storage component through the cooperation of the first raw gas pipeline, the second raw gas pipeline, the mixed gas pipeline, the mixed gas storage component, the gas distribution valve group, the bus assembly and the control module, so that not only the proportioning accuracy is high, but also it is not affected by the external temperature, and no manual intervention is required in the whole process, which can save manpower.

Description

Technical Field

[0001] The invention belongs to the technical field of proportioning and mixing equipment, and more specifically, relates to a fully automatic proportioning device and method for nitric oxide inhalation. Background Art

[0002] Nitric oxide inhaler is a preparation made by mixing nitric oxide and nitrogen in a certain proportion. The main production processes include nitric oxide preparation (including purification and separation), nitrogen preparation (including purification), proportioning and mixing of nitric oxide and nitrogen, and filling (filling) of the mixed gas. At present, the traditional way of mixing two or more gases is mainly to release the gases in a mixing pipe at the same time and achieve mixing during the flow of the gases. However, since nitric oxide inhaler is a medical preparation, the accuracy of the ratio is relatively high. When the gas flow mixing method is adopted, the accuracy of the ratio will be affected by factors such as temperature and gas delivery pressure. Therefore, it is necessary to design a fully automatic ratioing device and method for nitric oxide inhaler. Summary of the invention

[0003] The purpose of the present invention is to provide a fully automatic proportioning device and method for nitric oxide inhalation, so as to solve the technical problem in the prior art that when using a gas flow mixing method, the proportioning accuracy will be affected by factors such as temperature and gas delivery pressure, resulting in the proportioning accuracy being difficult to meet the requirements.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a fully automatic proportioning device for nitric oxide inhalation, including a first raw gas pipeline, a second raw gas pipeline, a mixed gas pipeline, a mixed gas storage component, a gas distribution valve group, a bus assembly and a control module, the first raw gas pipeline is provided with a first control valve to control the on-off of the first raw gas pipeline; the second raw gas pipeline is provided with a second control valve to control the on-off of the second raw gas pipeline; the mixed gas pipeline is provided with a third control valve to control the on-off of the mixed gas pipeline; the mixed gas storage component is connected to the mixed gas pipeline and is provided with a weighing module to weigh the internal gas; the gas distribution valve group is used to be connected to the gas filling component; the bus assembly is respectively connected to the first raw gas pipeline, the second raw gas pipeline, the mixed gas pipeline and the gas distribution valve group; the control module is respectively electrically connected to the first control valve, the second control valve, the third control valve, the gas distribution valve group and the weighing module to control the actions of the first control valve, the second control valve, the third control valve and the gas distribution valve group according to the data signal of the weighing module.

[0005] In combination with the above technical solution, in a possible implementation method, the first raw gas pipeline, the second raw gas pipeline and the mixed gas pipeline are all provided with gas supply and vent pipelines, and the fully automatic proportioning device for nitric oxide inhaler also includes a main pipeline vent pipeline and a vacuum pump pipeline, and the main pipeline vent pipeline and the vacuum pump pipeline are both connected to the gas distribution valve group.

[0006] In combination with the above technical solution, in a possible implementation, the fully automatic proportioning device for nitric oxide inhalation further includes a plurality of gas filling components, and the plurality of gas filling components are connected to the gas distribution valve group.

[0007] In combination with the above technical solution, in a possible implementation method, the air distribution valve group includes a first air distribution valve, a second air distribution valve and a diverter bar assembly, the first air distribution valve and the second air distribution valve are connected to the bus assembly at one end and connected to the diverter bar assembly at the other end, and the first air distribution valve and the second air distribution valve are electrically connected to the control module; wherein the ventilation volume of the first air distribution valve is greater than the ventilation volume of the second air distribution valve.

[0008] In combination with the above technical solution, in a possible implementation method, the mixed gas storage assembly includes an air cabin, an air intake nozzle and a docking pressure hose, the air cabin is connected to a weighing module to weigh the air cabin; the air intake nozzle is arranged on the air cabin, and one end extends into the air cabin; one end of the docking pressure hose is connected to the air intake nozzle, and the other end is connected to the mixed gas pipeline.

[0009] In combination with the above technical solution, in a possible implementation, a cylindrical cavity is provided inside the air cabin, and the air intake nozzle is a curved pipe structure.

[0010] In combination with the above technical solution, in a possible implementation, a Tesla valve is provided at the end of the intake nozzle, and the intake nozzle is connected to the middle of the Tesla valve; the Tesla valve is a bent pipe structure.

[0011] In combination with the above technical scheme, in a possible implementation method, a sealing shell, a plurality of flexible sealing rings, an elastic plate, a plurality of buffer elastic parts and a filling body are also provided on the intake nozzle. The sealing shell is fixedly connected to the inner wall of the air cabin to form a sealed cavity. The Tesla valve and the part of the intake nozzle located in the air cabin are located in the sealed cavity, and the sealing shell is provided with a through hole for the end of the Tesla valve to pass through; a plurality of flexible sealing rings are provided on the through hole to seal the sealing shell and the Tesla valve; the elastic plate is provided in the sealed cavity and connected to the intake nozzle; a plurality of buffer elastic parts are connected to the Tesla valve at one end and to the elastic plate at the other end; the filling body is filled in the sealed cavity to reduce shock and dissipate energy.

[0012] In combination with the above technical scheme, in a possible implementation method, the mixed gas storage assembly also includes a pump air assembly, a buffer air bag and a buffer airbag, the pump air assembly is arranged on the air cabin; the buffer air bag is arranged on the air cabin; the buffer airbag is arranged in the air cabin and connected to the buffer air bag through the pump air assembly; wherein, the buffer air bag and the buffer airbag are filled with buffer gas, and when the air intake nozzle inflates the air cabin, the pump air assembly pumps air from the buffer airbag to the buffer airbag, causing the buffer airbag to shrink; when the air cabin is deflated through the air intake nozzle, the pump air assembly pumps air from the buffer airbag to the buffer airbag, causing the buffer airbag to expand.

[0013] In combination with the above technical solution, in a possible implementation method, the mixed gas storage assembly also includes a pneumatic mixing mechanism, which is arranged in the air cabin. The pneumatic mixing mechanism includes a rotating shaft bracket, a rotating shaft, a pneumatic wheel, a stirring blade and an inertia wheel. The rotating shaft bracket is arranged in the air cabin; the rotating shaft is rotatably connected to the rotating shaft bracket; the pneumatic wheel is arranged on the rotating shaft, and the air intake nozzle faces the pneumatic wheel so as to rotate driven by the gas ejected from the air intake nozzle; the stirring blade is arranged on the rotating shaft; and the inertia wheel is arranged on the rotating shaft.

[0014] To achieve the above object, the present invention also adopts a technical solution of: providing a fully automatic proportioning method for nitric oxide inhalation, using the above-mentioned fully automatic proportioning device for nitric oxide inhalation, comprising the following steps:

[0015] S100, the control module controls the first control valve and the third control valve to open, and controls the second control valve and the gas distribution valve group to close, so that the first raw gas enters the mixed gas storage assembly through the first raw gas pipeline, the bus assembly and the mixed gas pipeline;

[0016] S200, the control module receives the weight signal detected by the weighing module. When the weight signal reaches the first rated value, the control module controls the first control valve to close and controls the second control valve to open, so that the second raw gas enters the mixed gas storage assembly through the second raw gas pipeline, the bus assembly and the mixed gas pipeline;

[0017] S300: When the weight signal reaches the second rated value, the control module controls the second control valve and the third control valve to close.

[0018] The beneficial effect of the fully automatic proportioning device and method for nitric oxide inhaler provided by the present invention is that: compared with the prior art, the present invention cooperates with the first raw gas pipeline, the second raw gas pipeline, the mixed gas pipeline, the mixed gas storage component, the gas distribution valve group, the bus assembly and the control module, and uses the control module to automatically proportion and mix the first raw gas and the second raw gas according to the weight of the first raw gas and the second raw gas filled into the mixed gas storage component. Not only is the proportioning accuracy high, but it is also not affected by the external temperature. In addition, no manual intervention is required in the whole process, which can save manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A schematic diagram of the piping structure of a fully automatic proportioning device for nitric oxide inhalation provided in an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A partial enlarged structural schematic diagram of the first raw gas pipeline;

[0022] Figure 3 for Figure 1 A partial enlarged structural schematic diagram of the second raw gas pipeline;

[0023] Figure 4 for Figure 1 A partial enlarged structural diagram of the mixed gas pipeline;

[0024] Figure 5 for Figure 1 An enlarged structural diagram of the center gas distribution valve group;

[0025] Figure 6 for Figure 1 An enlarged structural diagram of the gas filling component in the middle;

[0026] Figure 7 for Figure 1 An enlarged structural diagram of the venting pipeline of the middle main pipeline;

[0027] Figure 8 A schematic diagram of the structure of a mixed gas storage component of a fully automatic proportioning device for nitric oxide inhalation provided by an embodiment of the present invention;

[0028] Fig. 9 A schematic cross-sectional view of the mixed gas storage component of the fully automatic proportioning device for nitric oxide inhalation provided by an embodiment of the present invention;

[0029] Fig.10 A schematic diagram of the structure of the air intake nozzle portion of the fully automatic proportioning device for nitric oxide inhalation provided by an embodiment of the present invention;

[0030] Fig.11 A schematic cross-sectional view of the air intake nozzle portion of the fully automatic proportioning device for nitric oxide inhalation provided by an embodiment of the present invention;

[0031] Fig.12 A schematic cross-sectional view of the air intake nozzle portion of a fully automatic proportioning device for nitric oxide inhalation provided in another embodiment of the present invention.

[0032] Among them, the reference numerals in the figures are as follows:

[0033] 10. First raw gas pipeline; 11. First control valve; 12. Gas supply and vent pipeline;

[0034] 20. Second raw material gas pipeline; 21. Second control valve;

[0035] 30. Mixed gas pipeline; 31. Third control valve;

[0036] 40. Mixed gas storage assembly; 41. Weighing module; 42. Air chamber; 43. Intake nozzle;

[0037] 431, Tesla valve; 432, sealing shell; 433, flexible sealing ring; 434, elastic plate; 435, buffer elastic member; 436 filling body;

[0038] 44. Connecting pressure hose; 45. Pump air assembly; 46. Buffer air bag; 47. Buffer air bag;

[0039] 481, rotating shaft bracket; 482, rotating shaft; 483, pneumatic wheel; 484, stirring blade; 485, inertia wheel;

[0040] 50. Gas distribution valve group; 51. First gas distribution valve; 52. Second gas distribution valve; 53. Diverter bar assembly;

[0041] 60. Busbar assembly; 70. Gas filling assembly; 80. Main pipeline venting pipeline; 90. Vacuum pump pipeline. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0043] It should be further explained that the drawings and implementation modes of the present invention mainly describe the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0044] When an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0045] The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. The directions or positional relationships indicated by the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. 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 invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0047] The fully automatic proportioning device and method for nitric oxide inhalation provided by the present invention are now described.

[0048] like Figures 1 to 7 As shown, the first embodiment of the present invention provides a fully automatic proportioning device for nitric oxide inhalation, including a first raw gas pipeline 10, a second raw gas pipeline 20, a mixed gas pipeline 30, a mixed gas storage component 40, a gas distribution valve group 50, a bus assembly 60 and a control module, the first raw gas pipeline 10 is provided with a first control valve 11 to control the on-off of the first raw gas pipeline 10; the second raw gas pipeline 20 is provided with a second control valve 21 to control the on-off of the second raw gas pipeline 20; the mixed gas pipeline 30 is provided with a third control valve 31 to control the on-off of the mixed gas pipeline 30; the mixed gas storage component 40 is connected to the mixed gas pipeline 30, and is provided with a weighing module 41 for weighing the internal gas; the gas distribution valve group 50 is used to connect with the gas filling component 70; the bus assembly 60 is respectively connected to the first raw gas pipeline 10, the second raw gas pipeline 20, the mixed gas pipeline 30 and the gas distribution valve group 50; the control module is respectively electrically connected to the first control valve 11, the second control valve 21, the third control valve 31, the gas distribution valve group 50 and the weighing module 41 to control the actions of the first control valve 11, the second control valve 21, the third control valve 31 and the gas distribution valve group 50 according to the data signal of the weighing module 41.

[0049] At the same time, based on the same inventive concept, this embodiment also provides a fully automatic proportioning method for nitric oxide inhalation, using the above-mentioned fully automatic proportioning device for nitric oxide inhalation, comprising the following steps:

[0050] S100, the control module controls the first control valve 11 and the third control valve 31 to open, and controls the second control valve 21 and the gas distribution valve group 50 to close, so that the first raw gas enters the mixed gas storage assembly 40 through the first raw gas pipeline 10, the bus assembly 60 and the mixed gas pipeline 30;

[0051] S200, the control module receives the weight signal detected by the weighing module 41. When the weight signal reaches the first rated value, the control module controls the first control valve 11 to close, and controls the second control valve 21 to open, so that the second raw gas enters the mixed gas storage assembly 40 through the second raw gas pipeline 20, the bus assembly 60 and the mixed gas pipeline 30;

[0052] S300. When the weight signal reaches the second rated value, the control module controls the second control valve 21 and the third control valve 31 to close, and the fully automatic proportioning is completed at this time; then when the gas filling component 70 needs gas, the third control valve 31 and the gas distribution valve group 50 are controlled to open, and gas is supplied to the gas filling component 70 through the mixed gas storage component 40.

[0053] The first raw material gas may be one of nitric oxide and nitrogen, and the second raw material gas may be the other of nitric oxide and nitrogen, so as to achieve the proportioned mixing preparation of nitric oxide inhalant.

[0054] Compared with the prior art, the fully automatic proportioning device and method for nitric oxide inhaler provided in the present embodiment, through the cooperation of the first raw gas pipeline 10, the second raw gas pipeline 20, the mixed gas pipeline 30, the mixed gas storage component 40, the gas distribution valve group 50, the bus assembly 60 and the control module, utilizes the control module to automatically proportion and mix the first raw gas and the second raw gas according to the weight of the first raw gas and the second raw gas filled into the mixed gas storage component 40, not only has high proportioning accuracy, but is also not affected by the external temperature, and no manual intervention is required in the whole process, which can save manpower.

[0055] like Figures 1 to 12 As shown, a specific implementation manner provided by the present invention based on the first implementation manner is as follows.

[0056] like Figure 1 As shown, in some embodiments, the first raw gas pipeline 10, the second raw gas pipeline 20 and the mixed gas pipeline 30 are all provided with a gas supply venting pipeline 12, and the fully automatic proportioning device for nitric oxide inhalation further includes a main pipeline venting pipeline 80 and a vacuum pump pipeline 90, and the main pipeline venting pipeline 80 and the vacuum pump pipeline 90 are both connected to the gas distribution valve group 50. In this way, the excess gas in the pipeline can be released through the venting pipeline, or it can be connected to the vacuum pump through the vacuum pump pipeline 90, so as to evacuate the gas in the pipeline to avoid affecting the mixing ratio of the subsequent gas.

[0057] The fully automatic proportioning device for nitric oxide inhalation further comprises a plurality of gas filling assemblies 70, and the plurality of gas filling assemblies 70 are connected to the gas distribution valve assembly 50. The mixed gas can be filled into a storage and transportation device such as a gas cylinder through the gas filling assemblies 70.

[0058] The gas distribution valve group 50 includes a first gas distribution valve 51, a second gas distribution valve 52 and a diverter assembly 53. The first gas distribution valve 51 and the second gas distribution valve 52 are connected to the bus assembly 60 at one end and connected to the diverter assembly 53 at the other end, and the first gas distribution valve 51 and the second gas distribution valve 52 are both electrically connected to the control module; wherein, the ventilation volume of the first gas distribution valve 51 is greater than the ventilation volume of the second gas distribution valve 52. Several gas filling assemblies 70, main pipeline venting pipeline 80 and vacuum pump pipeline 90 are all connected to the diverter assembly 53. In this way, through two groups of gas distribution valves with different ventilation volumes, the ventilation volume can be controlled more flexibly, and the opening and closing of different gas distribution valves can be controlled according to the gas consumption of the gas-using end such as the rear-end gas filling assembly 70, so as to avoid the instability or sudden change of the internal air pressure of the pipeline caused by the instantaneous flow change at the gas-using end, thereby avoiding the impact on the filling quality and avoiding the danger.

[0059] like Figure 8 and Fig. 9 As shown, in some embodiments, the mixed gas storage assembly 40 includes an air cabin 42, an air intake nozzle 43 and a docking pressure hose 44, the air cabin 42 is connected to a weighing module 41 to weigh the air cabin 42; the air intake nozzle 43 is disposed on the air cabin 42, and one end extends into the air cabin 42; one end of the docking pressure hose 44 is connected to the air intake nozzle 43, and the other end is connected to the mixed gas pipeline 30.

[0060] In order to facilitate the preparation of products with different proportions, a venting pipeline may be provided in the gas chamber 42 so as to vent the mixed gas in the gas chamber 42 .

[0061] In some specific embodiments, a cylindrical cavity is provided inside the air cabin 42, and the air intake nozzle 43 is a curved pipe structure, so that when air is taken in, the gas passing through the air intake nozzle 43 promotes the flow of gas in the air cabin 42, thereby promoting the mixing of different gases.

[0062] like Figures 9 to 11 As shown, in some other specific embodiments, a Tesla valve 431 is provided at the end of the intake nozzle 43, and the intake nozzle 43 is connected to the middle of the Tesla valve 431.

[0063] Tesla valve 431 is a one-way conducting fluid valve without any moving parts. Since Tesla valve 431 is provided with a plurality of annular rotating channels, the fluid encounters relatively little resistance when passing through Tesla valve 431 in the forward direction and can pass through smoothly. However, when passing through Tesla valve 431 in the reverse direction, the fluid will recoil when passing through the rotating channel, making the resistance very large and difficult to pass through smoothly. Moreover, the greater the flow rate of the passing fluid, the greater the resistance.

[0064] Through this structure, when the air capsule 42 is inflated, due to the relatively high gas flow rate, a Venturi tube structure can be formed between the Tesla valve 431 and the intake nozzle 43, that is, the intake of the intake nozzle 43 drives one end of the Tesla valve 431 to inhale air and eject it from the other end, which is more conducive to the mixing of the gas in the air capsule 42; and when the air capsule 42 is deflated, most of the gas quickly passes through the Tesla valve 431 from one end to enter the intake nozzle 43, and a small amount of gas can slowly enter the intake nozzle 43 from the other end of the Tesla valve 431 at a low flow rate, which makes the intake volume of the intake nozzle 43 more sufficient, thereby improving the deflation efficiency.

[0065] Furthermore, the Tesla valve 431 is a curved pipe structure to prevent the gas discharged from one end of the Tesla valve 431 from directly entering the other end of the Tesla valve 431 again after circulating in the gas chamber 42 for one cycle; that is, it is more conducive to the mixing of the gas in the gas chamber 42. The curved pipe structure is preferably a curved pipe structure with an axis on a vertical plane to facilitate the flow of gas up and down in the gas chamber 42.

[0066] Furthermore, if Fig.12 As shown, in order to reduce the vibration on the Tesla valve 431, thereby reducing noise and metal fatigue, the intake nozzle 43 is also provided with a sealing shell 432, a plurality of flexible sealing rings 433, an elastic plate 434, a plurality of buffer elastic members 435 and a filling body 436. The sealing shell 432 is fixedly connected to the inner wall of the air cabin 42 to form a sealed cavity. The Tesla valve 431 and the portion of the intake nozzle 43 located in the air cabin 42 are located in the sealed cavity, and the sealing shell 432 is provided with a through hole for the end of the Tesla valve 431 to pass through; a plurality of flexible sealing rings 433 are provided on the through hole to seal between the sealing shell 432 and the Tesla valve 431; the elastic plate 434 is provided in the sealed cavity and connected to the intake nozzle 43; one end of the plurality of buffer elastic members 435 is connected to the Tesla valve 431, and the other end is connected to the elastic plate 434; the filling body 436 is filled in the sealed cavity to reduce vibration and dissipate energy.

[0067] When air flows through the Tesla valve 431 and generates vibration, a small part of the vibration is dissipated through the flexible sealing ring 433, and most of it is transmitted to the buffer elastic member 435 and the filling body 436 for energy dissipation. If the vibration is more severe, the buffer elastic member 435 transmits the vibration to the elastic plate 434, and uses resonance to drive the elastic plate 434 to move in the filling body 436 for energy dissipation.

[0068] The filler 436 mainly provides friction, thereby reducing shock and dissipating energy. The filler 436 can be a viscous liquid fluid, or a fluid solid such as fine sand. In some specific embodiments, the filler 436 is a non-Newtonian fluid filled in an elastic capsule, and one or more of the elastic capsules are filled in the sealed cavity, so that fluid leakage can be prevented from entering the air chamber 42.

[0069] Specifically, the buffer elastic member 435 can be a component such as a spring, a linear rope, etc. that has a strong buffering effect, or it can be a component such as a wire rope, a connecting rod, etc. that can transmit vibration to the elastic plate 434; the elastic plate 434 can be fixed to the air intake nozzle 43 by welding or the like, or it can be sleeved on the air intake nozzle 43 and connected to the air intake nozzle 43 through a buffer gasket to enhance the shock absorption and energy dissipation effect.

[0070] In a specific embodiment, the elastic plate 434 is an elliptical plate parallel to the plane where the Tesla valve 431 is located, and the Tesla valve 431 is connected to the buffer elastic member 435 through a clamp, and the elastic plate 434 is connected to the buffer elastic member 435 through a hanging hole or a hanging ring.

[0071] In some specific embodiments, Fig. 9 As shown, the mixed gas storage assembly 40 also includes a pump air assembly 45, a buffer air bag 46 and a buffer airbag 47. The pump air assembly 45 is arranged on the air cabin 42; the buffer air bag 46 is arranged on the air cabin 42; the buffer airbag 47 is arranged in the air cabin 42 and is connected to the buffer air bag 46 through the pump air assembly 45; wherein, the buffer air bag 46 and the buffer airbag 47 are filled with buffer gas, and when the air intake nozzle 43 inflates the air cabin 42, the pump air assembly 45 pumps air from the buffer airbag 47 to the buffer airbag 46, so that the buffer airbag 47 shrinks, thereby making the air cabin 42 have a larger space to accommodate the raw material gas; when the air cabin 42 is deflated through the air intake nozzle 43, the pump air assembly 45 pumps air from the buffer air bag 46 to the buffer airbag 47, so that the buffer airbag 47 expands, thereby making the space for accommodating the raw material gas in the air cabin 42 smaller. Through this form, the pressure change in the air chamber 42 can be reduced, so that the pressure is more stable when the air chamber 42 is inflated and deflated, so as to facilitate the stable operation of the gas filling assembly 70.

[0072] In order to ensure the shape of the cushioning airbag 47 , a telescopic bracket or other mechanism may be provided inside the cushioning airbag 47 for support.

[0073] In some specific embodiments, Fig. 9 As shown, the mixed gas storage assembly 40 also includes a pneumatic mixing mechanism, which is arranged in the air cabin 42. The pneumatic mixing mechanism includes a rotating shaft bracket 481, a rotating shaft 482, a pneumatic wheel 483, a stirring blade 484 and an inertia wheel 485. The rotating shaft bracket 481 is arranged in the air cabin 42; the rotating shaft 482 is rotatably connected to the rotating shaft bracket 481; the pneumatic wheel 483 is arranged on the rotating shaft 482, and the air intake nozzle 43 faces the pneumatic wheel 483, so as to rotate under the drive of the gas ejected from the air intake nozzle 43; the stirring blade 484 is arranged on the rotating shaft 482; and the inertia wheel 485 is arranged on the rotating shaft 482.

[0074] When the air intake nozzle 43 inflates the air chamber 42, the gas ejected from the air intake nozzle 43 drives the pneumatic wheel 483 to rotate, and drives the rotating shaft 482, the stirring blades 484 and the inertia wheel 485 to rotate, so as to stir and mix the gas in the air chamber 42. Moreover, when the first raw gas enters, a certain rotational inertia can be accumulated through the inertia wheel 485, so that when the second raw gas enters, the stirring effect can be improved.

[0075] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully automatic proportioning device for nitric oxide inhalation, characterized in that: include: The first raw gas pipeline (10) is provided with a first control valve (11) to control the opening and closing of the first raw gas pipeline (10); The second raw gas pipeline (20) is provided with a second control valve (21) to control the opening and closing of the second raw gas pipeline (20); The mixed gas pipeline (30) is provided with a third control valve (31) to control the opening and closing of the mixed gas pipeline (30); A mixed gas storage assembly (40) is connected to the mixed gas pipeline (30) and is provided with a weighing module (41) for weighing the gas inside; A gas distribution valve assembly (50), used for connecting to a gas filling assembly (70); a busbar assembly (60) connected to the first raw gas pipeline (10), the second raw gas pipeline (20), the mixed gas pipeline (30) and the gas distribution valve assembly (50), respectively; a control module electrically connected to the first control valve (11), the second control valve (21), the third control valve (31), the gas distribution valve group (50) and the weighing module (41) respectively, so as to control the actions of the first control valve (11), the second control valve (21), the third control valve (31) and the gas distribution valve group (50) according to a data signal from the weighing module (41); The mixed gas storage assembly (40) comprises: An air chamber (42) connected to the weighing module (41) so as to weigh the air chamber (42); An air intake nozzle (43) is disposed on the air cabin (42), and one end of the nozzle extends into the air cabin (42); A connecting pressure hose (44) having one end connected to the air intake nozzle (43) and the other end connected to the mixed gas pipeline (30); A Tesla valve (431) is provided at the end of the air intake nozzle (43), and the air intake nozzle (43) is connected to the middle of the Tesla valve (431).

2. The fully automatic proportioning device for nitric oxide inhalation according to claim 1, characterized in that: The first raw gas pipeline (10), the second raw gas pipeline (20) and the mixed gas pipeline (30) are all provided with a gas supply vent pipeline (12), and the fully automatic proportioning device for nitric oxide inhalation further comprises a main pipeline vent pipeline (80) and a vacuum pump pipeline (90), and the main pipeline vent pipeline (80) and the vacuum pump pipeline (90) are both connected to the gas distribution valve group (50).

3. The fully automatic proportioning device for nitric oxide inhalation according to claim 1, characterized in that: The fully automatic proportioning device for nitric oxide inhalation further comprises a plurality of gas filling assemblies (70), wherein the plurality of gas filling assemblies (70) are connected to the gas distribution valve assembly (50).

4. The fully automatic proportioning device for nitric oxide inhalation according to claim 1, characterized in that: The gas distribution valve group (50) comprises a first gas distribution valve (51), a second gas distribution valve (52) and a flow distribution bar assembly (53); one end of each of the first gas distribution valve (51) and the second gas distribution valve (52) is connected to the bus bar assembly (60) and the other end is connected to the flow distribution bar assembly (53); and each of the first gas distribution valve (51) and the second gas distribution valve (52) is electrically connected to the control module; wherein the air flow rate of the first gas distribution valve (51) is greater than the air flow rate of the second gas distribution valve (52).

5. The fully automatic proportioning device for nitric oxide inhalation according to claim 1, characterized in that: The air intake nozzle (43) is also provided with: A sealing shell (432) is fixedly connected to the inner wall of the air chamber (42) to form a sealed cavity, wherein the Tesla valve (431) and the portion of the air intake nozzle (43) located in the air chamber (42) are located in the sealed cavity, and the sealing shell (432) is provided with a through hole for the end of the Tesla valve (431) to pass through; A plurality of flexible sealing rings (433) are provided on the through hole and are used to seal between the sealing shell (432) and the Tesla valve (431); An elastic plate (434) is disposed in the sealing cavity and connected to the air intake nozzle (43); A plurality of buffer elastic members (435), one end of which is connected to the Tesla valve (431) and the other end of which is connected to the elastic plate (434); A filling body (436) is filled in the sealing cavity to reduce vibration and dissipate energy.

6. The fully automatic proportioning device for nitric oxide inhalation according to claim 1, characterized in that: The mixed gas storage assembly (40) further includes: A pump air assembly (45) disposed on the air chamber (42); A buffer air bag (46) is arranged on the air cabin (42); A cushioning air bag (47) is arranged in the air chamber (42) and is connected to the cushioning air bag (46) via the air pump assembly (45); The buffer air bag (46) and the buffer airbag (47) are filled with buffer gas. When the air intake nozzle (43) inflates the air chamber (42), the air pumping assembly (45) pumps air from the buffer airbag (47) to the buffer air bag (46), so that the buffer airbag (47) contracts. When the air chamber (42) is deflated through the air intake nozzle (43), the air pumping assembly (45) pumps air from the buffer air bag (46) to the buffer airbag (47), so that the buffer airbag (47) expands.

7. The fully automatic proportioning device for nitric oxide inhalation according to claim 1, characterized in that: The mixed gas storage assembly (40) further comprises a pneumatic mixing mechanism, the pneumatic mixing mechanism being arranged in the air chamber (42), the pneumatic mixing mechanism comprising: A rotating shaft support (481) is arranged in the air chamber (42); A rotating shaft (482) is rotatably connected to the rotating shaft support (481); A pneumatic wheel (483) is arranged on the rotating shaft (482), and the air intake nozzle (43) faces the pneumatic wheel (483) so as to rotate under the drive of the gas ejected from the air intake nozzle (43); A stirring blade (484) is disposed on the rotating shaft (482); The inertia wheel (485) is arranged on the rotating shaft (482).

8. A fully automatic proportioning method for nitric oxide inhalation, characterized in that: The fully automatic proportioning device for nitric oxide inhalation according to any one of claims 1 to 7 comprises the following steps: S100, the control module controls the first control valve (11) and the third control valve (31) to open, and controls the second control valve (21) and the gas distribution valve assembly (50) to close, so that the first raw gas enters the mixed gas storage assembly (40) via the first raw gas pipeline (10), the bus assembly (60) and the mixed gas pipeline (30); S200, the control module receives a weight signal detected by the weighing module (41); when the weight signal reaches a first rated value, the control module controls the first control valve (11) to close, and controls the second control valve (21) to open, so that the second raw material gas enters the mixed gas storage assembly (40) via the second raw material gas pipeline (20), the bus assembly (60), and the mixed gas pipeline (30); S300: When the weight signal reaches a second rated value, the control module controls the second control valve (21) and the third control valve (31) to close.

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