An airway structure for a ventilator

Abstract

The application belongs to the technical field of medical equipment, and particularly discloses a gas path structure of a breathing machine, which comprises an oxygen supply branch, an air supply branch, an air-oxygen mixing pipe, and an air-oxygen output branch, wherein the oxygen supply branch is provided with a first airflow smoothing assembly and a first flowmeter, the air supply branch is provided with a second airflow smoothing assembly and a second flowmeter, and the air-oxygen output branch is provided with a third flowmeter, a third airflow smoothing assembly, and a fourth airflow smoothing assembly; oxygen and air are mixed in the air-oxygen mixing pipe. The oxygen supply branch, the air supply branch, and the air-oxygen output branch are provided with corresponding airflow smoothing assemblies to reduce the stress of airflow in the gas path, thereby reducing the turbulence of the gas path of the breathing machine, smoothing the airflow, stabilizing the flow, improving the inhalation comfort of patients, and setting the flowmeters to accurately measure and monitor the flow of each gas path, so that the breathing machine works stably.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to the airway structure of a ventilator. Background Technology

[0002] A ventilator is a device that can replace, control, or alter a person's normal physiological breathing, increase lung ventilation, improve respiratory function, reduce the work of breathing, and conserve cardiac reserve. Ventilators are widely used in the treatment of respiratory failure from various causes, sleep apnea-hypopnea syndrome, and other diseases. They occupy a very important position in modern medicine, and people are increasingly valuing their comfort.

[0003] A ventilator typically consists of a main unit, air source, air circuit, humidifier, and external tubing. Most modern ventilators use an electric system to supply air to the patient, employing a turbine fan to provide pressure and flow. This air is then processed by the air circuit and humidifier before being delivered to the patient through external tubing. During the air supply process, the main unit provides respiratory management, monitoring the air-oxygen mixture according to set parameters, including ventilation volume, pressure, flow rate, and volume. This monitoring ensures the ventilator's operational stability, providing the patient with optimal respiratory status and significantly aiding in recovery.

[0004] However, one of the monitoring parameters, flow rate, is affected by factors such as airflow velocity, airflow pattern, and the size of the flow path structure. The airflow is prone to turbulence, which can affect the accuracy of the flow meter measurement, resulting in poor working stability of the ventilator and affecting the patient's inspiratory comfort. Summary of the Invention

[0005] The purpose of this invention is to provide a ventilator airway structure that reduces turbulence in the ventilator airway, resulting in smoother airflow and stable flow, thereby improving the patient's inspiratory comfort; and the flow meter accurately measures and monitors the airway flow, ensuring stable ventilator operation.

[0006] The objective of this invention is achieved through the following technical solution: an airway structure for a ventilator, comprising:

[0007] The oxygen supply branch includes a high-pressure proportional valve, a first airflow smoothing component, a first flow meter, a first oxygen pipe, and a second oxygen pipe; the high-pressure proportional valve is connected to an external oxygen supply device to control the proportion of oxygen entering; one end of the first oxygen pipe is connected to the high-pressure proportional valve, and the other end is connected to one end of the first flow meter; the first airflow smoothing component is installed in the first oxygen pipe; one end of the second oxygen pipe is connected to the other end of the first flow meter.

[0008] An air supply branch includes a turbine fan, a second airflow smoothing component, an air duct, and a second flow meter; the turbine fan is provided with an air inlet, one end of the second flow meter is connected to the turbine fan, and the other end is connected to one end of the second airflow smoothing component, and the other end of the second airflow smoothing component is connected to the air duct.

[0009] An air-oxygen mixing pipe, one end of which is connected to a second oxygen pipe and an air pipe, respectively; and

[0010] The air-oxygen output branch includes an air-oxygen output pipe, a third airflow smoothing component, a fourth airflow smoothing component, and a third flow meter. One end of the third flow meter is connected to the air-oxygen mixing pipe, and the other end of the third flow meter is connected to the air-oxygen output pipe. The air-oxygen output pipe is provided with an air outlet. The third airflow smoothing component and the fourth airflow smoothing component are arranged alternately in the air-oxygen output pipe.

[0011] Preferably, the first airflow smoothing component includes two sets of first honeycomb cores, which are respectively spaced apart in the first oxygen pipe; the second airflow smoothing component includes a first porous guide plate and a buffer tube, one end of the buffer tube is connected to a second flow meter, and the other end is connected to an air pipe, and the first porous guide plate is installed in the middle of the buffer tube; the third airflow smoothing component is a second honeycomb core, which is installed at one end of the air-oxygen output pipe and close to the air-oxygen mixing pipe; the fourth airflow smoothing component is a second porous guide plate, which is installed at the end of the air-oxygen output pipe close to the outlet.

[0012] Preferably, the middle part of the buffer tube is cylindrical, and the buffer tube has an inner cavity, the inner diameter of which gradually decreases from the middle part of the buffer tube to the two ends.

[0013] Preferably, the first porous guide plate is provided with a plurality of guide holes of equal diameter, wherein one guide hole is located at the center of the first porous guide plate, and the remaining guide holes are evenly spaced along the circumference of the first porous guide plate.

[0014] Preferably, the air-oxygen mixing pipe is inclined and has a first stirring plate and a second stirring plate. The first stirring plate and the second stirring plate have semi-circular through holes and are spaced apart in the air-oxygen mixing pipe.

[0015] Preferably, the semi-circular through holes of the first stirring plate and the second stirring plate are staggered.

[0016] Preferably, bosses are provided at both ends of the air-oxygen mixing pipe, and the first and second stirring plates are respectively provided with grooves that mate with the corresponding bosses, with the bosses being embedded in the grooves.

[0017] Preferably, the air duct includes an air duct body, a bend, and a connecting pipe. One end of the air duct body is connected to the second airflow smoothing component, and the other end is connected to one end of the bend. The other end of the bend is connected to one end of the connecting pipe, and the other end of the connecting pipe is connected to the air-oxygen mixing duct.

[0018] Preferably, the inner diameter of the air-oxygen output pipe is larger than the inner diameter of the air-oxygen mixing pipe.

[0019] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0020] The aforementioned ventilator's airway structure includes corresponding airflow smoothing components in the oxygen supply branch, air supply branch, and air-oxygen output branch, reducing airflow turbulence in the ventilator's airway, resulting in smoother airflow and stable flow, thus improving the patient's inhalation comfort; flow meters are installed in each airway branch to accurately monitor the flow rate of the branch, thereby ensuring stable ventilator operation. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the airway structure of a ventilator according to the present invention;

[0023] Figure 2 This is a schematic diagram of the oxygen supply branch circuit;

[0024] Figure 3 This is a schematic diagram of the air supply branch circuit;

[0025] Figure 4 This is a schematic diagram of the air-oxygen mixing pipe.

[0026] Figure 5 This is a schematic diagram of the air / oxygen output branch.

[0027] Figure 6 This is a schematic diagram of the first honeycomb core structure.

[0028] Figure label:

[0029] 1-Oxygen supply branch, 11-High-pressure proportional valve, 12-First airflow smoothing component, 121-First honeycomb core, 13-First flow meter, 14-First oxygen inlet pipe, 15-Second oxygen inlet pipe

[0030] 2-Air supply branch, 21-Turbine fan, 211-Air inlet, 22-Second airflow smoothing component, 221-First perforated guide plate, 222-Buffer box, 223-Guide hole, 23-Air pipe, 231-Air pipe body, 232-Bend, 233-Connecting pipe, 24-Second flow meter

[0031] 3-Air-oxygen mixing pipe; 31-First stirring plate; 32-Second stirring plate; 33-Semi-circular through hole; 34-Boss; 35-Groove.

[0032] 4-Air and oxygen output branch, 41-Air and oxygen output pipe, 411-Outlet, 42-Third airflow smoothing component, 43-Fourth airflow smoothing component, 431-Second perforated guide plate, 44-Third flow meter. Detailed Implementation

[0033] Please see Figures 1 to 5 A ventilator's airway structure includes: an oxygen supply branch 1, an air supply branch 2, an air-oxygen mixing tube 3, and an air-oxygen output branch 4.

[0034] Oxygen supply branch 1 includes a high-pressure proportional valve 11, a first airflow smoothing component 12, a first flow meter 13, a first oxygen conduit 14, and a second oxygen conduit 15. The high-pressure proportional valve 11 is connected to an external oxygen supply device to control the oxygen intake ratio. One end of the first oxygen conduit 14 is connected to the high-pressure proportional valve 11, and the other end is connected to one end of the first flow meter 13. The first airflow smoothing component 12 is disposed in the first oxygen conduit 14. One end of the second oxygen conduit 15 is connected to the other end of the first flow meter 13. Air supply branch 2 includes a turbine fan 2121, a second airflow smoothing component 22, an air conduit 23, and a second flow meter 24. The turbine fan 21 has an air inlet 211. One end of the second flow meter 24 is connected to the turbine fan 21, and the other end is connected to one end of the second airflow smoothing component 22. The other end of the second airflow smoothing component 22 is connected to the air conduit 23. One end of the air-oxygen mixing conduit 3 is connected to the second oxygen conduit 15 and the air conduit 23, respectively. The air-oxygen output branch 4 includes an air-oxygen output pipe 41, a third airflow smoothing component 42, a fourth airflow smoothing component 43, and a third flow meter 44. One end of the third flow meter 44 is connected to the air-oxygen mixing pipe 3, and the other end of the third flow meter 44 is connected to the air-oxygen output pipe 41. The air-oxygen output pipe 41 is provided with an air outlet 411. The third airflow smoothing component 42 and the fourth airflow smoothing component 43 are spaced apart in the air-oxygen output pipe 41.

[0035] Specifically, the high-pressure proportional valve 11 connects to external high-pressure oxygen equipment, such as an oxygen cylinder. The high-pressure proportional valve 11 adjusts the oxygen pressure and flow rate. The adjusted oxygen enters the first oxygen conduit 14, which is equipped with a first airflow smoothing component 12. The first airflow smoothing component 12 buffers the oxygen flow stress. The first flow meter 13 measures and monitors the oxygen flow rate. The oxygen then enters the second oxygen conduit 15. Ordinary outside air enters through the air inlet 211, is compressed by the turbine fan 21, and enters the second flow meter 24. The second flow meter 24 measures and monitors the compressed air flow rate. The compressed air enters the air conduit 23 through the second airflow smoothing component 22, buffering the air flow stress. Both the air conduit 23 and the second oxygen conduit 15 are connected to the input end of the air-oxygen mixing conduit 3, where air and oxygen are thoroughly mixed. The air-oxygen mixture passes through a third flow meter 44, which measures and monitors its flow rate. After passing through a third airflow smoothing component 42 and a fourth airflow smoothing component 43, the buffered air-oxygen gas is output from the outlet 411 for patient use. Preferably, the first flow meter 13, the second flow meter 24, and the third flow meter are all model SFM3119, and the turbine fan 21 is model C65MS1.

[0036] This invention discloses a ventilator airway structure in which the oxygen supply branch 1 and the air supply branch 2 are independently configured, allowing for individual buffering and adjustment, as well as individual parameter monitoring. This facilitates precise adjustment of the oxygen flow rate in the oxygen supply branch 1 and the air flow rate in the air supply branch 2 by the operator, thereby achieving accurate control of the output flow rate and oxygen concentration. Airflow smoothing components and flow meters are respectively installed in the oxygen supply branch 1, the air supply branch 2, and the air-oxygen output branch 4. Real-time monitoring of each airway branch reduces airflow stress and turbulence, resulting in smooth airflow in the airways. This stabilizes the ventilator's operation, ensures a stable airflow from the air-oxygen output branch 4, and improves patient comfort.

[0037] Please see Figures 2 to 5 Furthermore, the first airflow smoothing component 12 includes two sets of first honeycomb cores 121, which are respectively spaced apart in the first oxygen pipe 14; the second airflow smoothing component 22 includes a first porous guide plate 221 and a buffer tube 222, one end of the buffer tube 222 is connected to the second flow meter 24, and the other end is connected to the air pipe 23, and the first porous guide plate 221 is installed in the middle of the buffer tube 222; the third airflow smoothing component 42 is a second honeycomb core, which is installed at one end of the air-oxygen output pipe 41 and close to the air-oxygen mixing pipe 3; the fourth airflow smoothing component 43 is a second porous guide plate 431, which is installed at one end of the air-oxygen output pipe 41 close to the outlet 411.

[0038] Specifically, the buffer tube 222 has a cylindrical shape in the middle and an inner cavity with an inner diameter that gradually decreases from the middle to both ends. A first porous guide plate 221 is fixedly installed in the middle of the cylindrical shape. Conical tubes are symmetrically arranged on both sides of the cylinder, with their inner diameters gradually decreasing from the cylinder to the ends, and are connected to other components. This structure allows the compressed airflow to enter a relatively large space, which is beneficial for airflow buffering. The first porous guide plate 221 further guides the airflow, thereby reducing airflow stress and velocity. The first flow meter 13 has external threads on both sides, and the turbine fan 21 and the buffer tube 222 each have internal threads that match the external threads. The first flow meter 13 is threaded to both the turbine fan 21 and the buffer tube 222. The second porous guide plate 431 adopts the same structure as the first porous guide plate 221. Similarly, it further guides the air-oxygen mixture airflow, allowing for a smooth output of the air-oxygen mixture and improving the patient's inhalation comfort.

[0039] When the first honeycomb core 121 is subjected to a certain pressure of oxygen flow, it can disperse the oxygen flow to each honeycomb cell, easing airflow and stress, thereby avoiding excessive stress concentration of the oxygen flow and reducing oxygen flow stress and velocity. The second honeycomb core adopts the same structure as the first honeycomb core 121. Similarly, the second honeycomb core reduces the stress and velocity of the air-oxygen mixture. Preferably, the first honeycomb core 121 and the second honeycomb core are made of aluminum, and each honeycomb cell is polygonal.

[0040] Please see Figure 3 Furthermore, the first porous guide plate 221 is provided with a plurality of guide holes 223 of equal diameter, one of which is located at the center of the first porous guide plate 221, and the remaining guide holes 223 are evenly spaced along the circumference of the first porous guide plate 221. Specifically, the centers of the spaced guide holes 223 are on the same circumference. The diameter of the guide holes 223 is determined by the size of the first porous guide plate 221. Preferably, there are a total of 9 guide holes 223, one of which is located at the center of the first porous guide plate 221, and the other 8 are evenly spaced along the circumference of the first porous guide plate 221. With this structure, air flows out from each guide hole 223, thereby changing the original state of the gas having a fast velocity in the middle and a slow velocity at the edge in the tube, and changing it to a uniform distribution along the radial direction of the tube, with a stable flow velocity, reducing flow measurement errors, and improving the performance of the ventilator.

[0041] The second porous guide plate 431 has the same structure as the first porous guide plate 221.

[0042] Please see Figure 1 and Figure 4Furthermore, the air-oxygen mixing pipe 3 is inclined and has a first stirring plate 31 and a second stirring plate 32. Both the first stirring plate 31 and the second stirring plate 32 have semi-circular through holes 33, and are spaced apart within the air-oxygen mixing pipe 3. The inclined arrangement of the air-oxygen mixing pipe 3 increases its length, allowing for more thorough mixing of air and oxygen. The semi-circular through holes 33 allow the air-oxygen mixture to flow through, reducing the airflow rate and thus ensuring more thorough mixing of oxygen and air.

[0043] Please see Figure 4 Furthermore, the semi-circular through-hole 33 of the first stirring plate 31 is offset from the semi-circular through-hole 33 of the second stirring plate 32. The gas passes through the air-oxygen mixing pipe 3 in an "S" shape, ensuring thorough mixing of oxygen and air.

[0044] Please see Figure 4 Furthermore, protrusions 34 are provided at both ends of the air-oxygen mixing pipe 3, and the first stirring plate 31 and the second stirring plate 32 are respectively provided with grooves 35 that mate with the corresponding protrusions 34, with the protrusions 34 being embedded in the grooves 35. This structure prevents the first stirring plate 31 and the second stirring plate 32 from rotating in the air-oxygen mixing pipe 3, avoids gas turbulence caused by the rotation of the first stirring plate 31 and the second stirring plate 32, and improves the stability of the airflow.

[0045] Please see Figure 3 Furthermore, the air duct 23 includes an air duct body 231, a bend 232, and a connecting pipe 233. One end of the air duct body 231 is connected to the second airflow smoothing component 22, and the other end is connected to the bend 232. The other end of the bend 232 is connected to one end of the connecting pipe 233, and the other end of the connecting pipe 233 is connected to the air-oxygen mixing duct 3. By using the bend 232 and the connecting pipe 233, the airflow is prevented from flowing directly into the air-oxygen mixing duct 3, which can rectify the airflow and reduce collisions and turbulence between airflows of different directions.

[0046] Please see Figure 1 Furthermore, the inner diameter of the air-oxygen output pipe 41 is larger than the inner diameter of the air-oxygen mixing pipe 3.

[0047] The aforementioned ventilator's airway structure incorporates corresponding airflow smoothing components in the oxygen supply branch 1, air supply branch 2, and air-oxygen output branch 4. A bend 232 is incorporated to alter the flow direction in the air supply branch 2. The varying branch diameters and configurations reduce turbulence in the ventilator's airway, lowering stress on the airflow within the branch channels, resulting in smoother airflow and stable flow. Flow meters are installed in each branch to accurately monitor flow, thus ensuring stable ventilator operation and improving patient inspiratory comfort. Replacing the conventional air-oxygen mixer with an air-oxygen mixing tubing 3 not only saves material costs but also reduces the ventilator's size.

[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas circuit structure of a respirator, characterized by, The utility model relates to a kind of breathing machine, including: Oxygen supply branch (1), including high-pressure proportional valve (11), first airflow gentle component (12) and first flowmeter (13), first oxygen pipe (14) and second oxygen pipe (15);High-pressure proportional valve (11) is connected with external oxygen supply equipment, for controlling oxygen to enter proportion;First oxygen pipe (14) one end is communicated with high-pressure proportional valve (11), the other end is communicated with one end of first flowmeter (13), and first airflow gentle component (12) is set in first oxygen pipe (14);Second oxygen pipe (15) one end is communicated with the other end of first flowmeter (13); Air supply branch (2), including turbine fan (21), second airflow gentle component (22), air pipe (23) and second flowmeter (24);Turbine fan (21) is equipped with air inlet (211), and second flowmeter (24) one end is communicated with turbine fan (21), and the other end is communicated with one end of second airflow gentle component (22), and the other end of second airflow gentle component (22) is communicated with air pipe (23); Oxygen-air mixture pipe (3), and oxygen-air mixture pipe (3) one end is communicated with second oxygen pipe (15) and air pipe (23) respectively; Oxygen-air output branch (4), including oxygen-air output pipe (41), third airflow gentle component (42), fourth airflow gentle component (43) and third flowmeter (44), third flowmeter (44) one end is communicated with oxygen-air mixture pipe (3), and the other end of third flowmeter (44) is communicated with oxygen-air output pipe (41), and oxygen-air output pipe (41) is equipped with air outlet (411), and third airflow gentle component (42) and fourth airflow gentle component (43) are spaced apart and set in oxygen-air output pipe (41); Oxygen supply branch (1), air supply branch (2), oxygen-air output branch (4) are set with corresponding airflow gentle component, so that the airflow in the breathing machine gas path is relatively gentle; First airflow gentle component (12) includes two groups of first honeycomb core (121), and is spaced apart and set in first oxygen pipe (14) respectively;Second airflow gentle component (22) includes first porous flow guide plate (221) and buffer tube (222), and buffer tube (222) one end is connected with second flowmeter (24), and the other end is connected with air pipe (23), and first porous flow guide plate (221) is installed in the middle part of buffer tube (222);Third airflow gentle component (42) is second honeycomb core, and second honeycomb core is installed in one end of oxygen-air output pipe (41), and is close to oxygen-air mixture pipe (3);Fourth airflow gentle component (43) is second porous flow guide plate (431), and second porous flow guide plate (431) is installed in one end of oxygen-air output pipe (41) close to air outlet (411);Oxygen-air mixture pipe (3) is obliquely arranged, is equipped with first stirring plate (31) and second stirring plate (32), first stirring plate (31) and second stirring plate (32) are equipped with semicircular through hole (33), and first stirring plate (31) and second stirring plate (32) are spaced apart and set in oxygen-air mixture pipe (3); The middle part of the buffer tube (222) is cylindrical, and the buffer tube (222) is provided with an inner cavity, and the inner diameter of the inner cavity gradually decreases from the middle part of the buffer tube (222) to the two ports.

2. The gas path structure of a respirator according to claim 1, wherein The first porous flow guide plate (221) is provided with a plurality of flow guide holes (223) with equal hole diameters, one of which is arranged at the center of the first flow guide plate, and the remaining flow guide holes (223) are uniformly and circumferentially spaced apart along the first porous flow guide plate (221).

3. The gas path structure of a respirator according to claim 1 or 2, wherein The semicircular through hole (33) of the first stirring plate (31) is arranged in a staggered manner with the semicircular through hole (33) of the second stirring plate (32).

4. The gas path structure of a respirator according to claim 1 or 2, wherein The air-oxygen mixing pipe (3) is provided with a boss (34) at both ends, and the first stirring plate (31) and the second stirring plate (32) are respectively provided with a groove (35) matched with the corresponding boss (34), and the boss (34) is embedded and clamped in the groove (35).

5. The gas path structure of a respirator according to claim 3, wherein The air-oxygen mixing pipe (3) is provided with a boss (34) at both ends, and the first stirring plate (31) and the second stirring plate (32) are respectively provided with a groove (35) matched with the corresponding boss (34), and the boss (34) is embedded and clamped in the groove (35).

6. The gaspath structure of a respirator according to claim 1, 2 or 5, wherein, The air pipe (23) comprises an air pipe body (231), an elbow pipe (232) and a connecting pipe (233), one end of the air pipe body (231) is in communication with the second air flow gentle assembly (22), the other end is in communication with one end of the elbow pipe (232), the other end of the elbow pipe (232) is in communication with one end of the connecting pipe (233), and the other end of the connecting pipe (233) is in communication with the air-oxygen mixing pipe (3).

7. The gaspath structure of a respirator according to claim 1, 2 or 5, wherein, The inner diameter of the air-oxygen output pipe (41) is greater than the inner diameter of the air-oxygen mixing pipe (3).

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