Ventilator gas circuit module

Abstract

The present application discloses a ventilator gas circuit module, comprising: a housing, wherein a gas inlet chamber, an oxygen inlet chamber and a mixing chamber are arranged in the housing, the gas inlet chamber is separated from the mixing chamber by means of a first baffle rib, the oxygen inlet chamber is separated from the mixing chamber by means of a second baffle rib, the first baffle rib is provided with an air inlet configured to make the gas inlet chamber communicated with the mixing chamber, and the second baffle rib is provided with an oxygen inlet configured to make the oxygen inlet chamber communicated with the mixing chamber; and a fan module, wherein at least part of the fan module is arranged in the mixing chamber, a flow mixing chamber is formed between the fan module and the inner wall of the mixing chamber, the fan module is provided with an air inlet and an air outlet, and the air inlet is communicated with the flow mixing chamber. In the present application, a gas inlet module, an oxygen inlet module and the mixing module can be integrally arranged and jointly mounted inside the housing, so that the internal gas circuit module of the ventilator is completely integrated on the housing, thereby eliminating the need for structural connection and gas circuit connection, and making the arrangement of the modules more compact, and thus the size of the gas circuit module is effectively reduced.

Description

A breathing machine gas path module

[0001] The present application claims priority to the Chinese patent application No. 202410716591.6, filed on June 4, 2024, and entitled "A breathing machine gas path module", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application belongs to the technical field of medical equipment, and specifically relates to a breathing machine gas path module. BACKGROUND

[0003] With the development of science and technology and the improvement of life quality, the use of breathing machines is promoted, which is commonly used to assist patients with breathing difficulties or unable to breathe independently to complete the breathing process. The gas path system of the breathing machine generally includes an air inlet module, an oxygen inlet module and a mixing module. The air inlet module is in communication with the outside air for inhaling air inside. The oxygen inlet module is in communication with the oxygen generating module to make oxygen enter the inside of the breathing machine. The oxygen and air entering the inside of the breathing machine are mixed in the mixing module and pressurized by a fan, so as to form a mixed gas flow for the patient to breathe and delivered to the patient end.

[0004] Generally, the air inlet module, the oxygen inlet module and the mixing module inside the breathing machine are three independent modules, which are independently arranged separately and connected by pipelines. This not only leads to a complex internal structure of the breathing machine and a relatively disordered structure layout, but also causes the breathing machine to have a large size, which seriously restricts the miniaturization development. Moreover, the many pipelines make the connection of each pipeline difficult, the assembly process complex, and the arrangement of various pipelines disordered. Especially when a certain module inside the breathing machine is maintained or repaired, each pipeline needs to be frequently connected or disassembled, which reduces the reliability of the pipeline connection and easily causes air leakage. SUMMARY

[0005] The present application provides a breathing machine gas path module to solve the problem that the internal gas path modules of the breathing machine are independently arranged and connected by pipelines, which leads to a complex internal structure, a large size of the breathing machine, and difficult installation and maintenance, and low reliability of the pipeline connection.

[0006] The technical solution adopted by the present application is as follows:

[0007] The ventilator gas path module comprises a shell, an air inlet chamber, an oxygen inlet chamber and a mixing chamber are arranged in the shell, the air inlet chamber and the mixing chamber are separated by a first partition rib, the oxygen inlet chamber and the mixing chamber are separated by a second partition rib, the first partition rib is provided with an air inlet for communicating the air inlet chamber and the mixing chamber, and the second partition rib is provided with an oxygen inlet for communicating the oxygen inlet chamber and the mixing chamber; a fan module, at least part of the fan module is arranged in the mixing chamber, a mixing chamber is formed between the fan module and the inner wall of the mixing chamber, the fan module is provided with an air inlet and an air outlet, and the air inlet is communicated with the mixing chamber.

[0008] The ventilator gas path module of the present application further comprises the following additional technical features:

[0009] The first partition rib has a first partition section and a second partition section, the air inlet is located between the first partition section and the second partition section, and the air inlet chamber and the oxygen inlet chamber are separated by the second partition section.

[0010] The oxygen inlet is arranged away from the air inlet.

[0011] The mixing chamber has a mixing gas path between the air inlet and the air inlet, and the oxygen inlet is communicated with the mixing gas path.

[0012] The mixing gas path has an inlet end and an outlet end, the air inlet is located at the inlet end, and a flow guide rib is arranged at the oxygen inlet, and the flow guide rib is inclined to make the oxygen inlet inclined to the outlet end.

[0013] The second partition rib cooperates with the shell to form the oxygen inlet, and the flow guide rib is arranged on the second partition rib and / or the shell.

[0014] The cavity wall of the oxygen inlet chamber is provided with an oxygen inlet interface for connecting with an oxygen source module.

[0015] The gas path module further comprises a cover body capable of covering the mixing chamber, the fan module comprises a fan and a sound insulation cover, the sound insulation cover is located in the mixing chamber and covers the outer side of the fan, and the sound insulation cover is provided with a communication port for communicating the mixing chamber and the air inlet.

[0016] The communication port is located on the side of the mixing chamber away from the air inlet.

[0017] The sound insulation cover has a protruding abutting portion towards the cover body, and the abutting portion abuts with the cover body to form a noise reduction chamber between the sound insulation cover and the cover body.

[0018] The outer side wall of the abutting portion has an isolation portion abutting with the inner side wall of the mixing chamber, the isolation portion divides the mixing chamber into two flow channels, and the gas enters the fan through the flow channel where the communication port is located.

[0019] The shell further comprises a mounting chamber, the mounting chamber and the mixing chamber are correspondingly arranged on two sides of the shell, the fan module is fixed in the mounting chamber, and the air inlet extends to the inside of the mixing chamber through the cavity wall of the mixing chamber.

[0020] A first damping member is arranged between the inner wall of the mounting chamber and the fan module, and the first damping member abuts against the fan module and the inner wall of the mounting chamber respectively.

[0021] The fan module comprises a mounting seat and a fan, and a second damping member is arranged between the mounting seat and the fan to have a gap between the mounting seat and the fan.

[0022] The fan module and the inner wall of the mounting chamber have a mounting gap, and a noise reduction member is filled in the mounting gap.

[0023] The ventilator gas path module further comprises an air outlet pipeline, the air outlet pipeline is in communication with the air outlet, and the air outlet pipeline is provided with a backflow branch, the backflow branch is in communication with the mixed flow cavity.

[0024] The gas path module further comprises an air outlet pipeline, an exhalation pipeline and a purge module, the air outlet pipeline is in communication with the air outlet, the purge module comprises a control valve and an air inlet branch and a purge branch in communication with the control valve respectively, the air inlet branch is in communication with the air outlet pipeline, and the purge branch is in communication with the exhalation pipeline.

[0025] Due to the adoption of the above technical scheme, the application has the following beneficial effects:

[0026] 1、In the application, the air inlet chamber, the oxygen inlet chamber and the mixing chamber are formed in the shell and are separated by a plurality of ribs, and the ribs are provided with openings for communicating the chambers, so that on the one hand, the air inlet module, the oxygen inlet module and the mixing module can be arranged integrally and installed in the shell, so that the internal gas path module of the ventilator is completely integrated on the shell, not only saving the connection of the structure and the gas path, but also making the arrangement of the modules more concentrated, effectively reducing the volume of the gas path module, and helping to realize the miniaturization design of the ventilator. On the other hand, the ribs and the openings on the ribs realize the communication of the chambers, so that the internal structure of the shell realizes the gas path communication of the modules, without using additional pipelines to connect the gas paths between the modules, greatly simplifying the structure of the gas path module, making the gas path module more simple, and facilitating the overall installation and disassembly of the gas path module and the modules inside.

[0027] In addition, since the connecting pipeline is cancelled, the connection sealing between the modules will not be affected by the reliability of the pipeline connection, as long as the modules are installed in place, the channels in the shell can separate and communicate the chambers, greatly reducing the possibility of gas leakage of the gas path module, improving the use reliability and stability, and improving the use experience.

[0028] Moreover, the air and oxygen are preliminarily mixed in the mixing cavity before entering the fan module, and in this process, the air and oxygen are partially mixed, and the flow direction of the mixed gas flow is guided to be more regular in the mixing cavity, so that the air, oxygen and mixed gas flow enter the fan module in approximately the same direction, are further mixed and pressurized. In this way, the mixing effect of the air and oxygen can be improved, and the noise generated by the collision or impact of the air and oxygen during mixing can be reduced, the wind noise in the respirator is reduced, the respirator works more quietly, and the user experience is improved.

[0029] 2. As an embodiment of the present application, the first barrier rib has a first partition section and a second partition section, and the air inlet is located between the first partition section and the second partition section, and the air inlet chamber and the oxygen inlet chamber are separated by the second partition section. The air inlet is located between the first partition section and the second partition section, which ensures that the air inlet does not directly communicate with the oxygen inlet chamber, avoids the air directly entering the oxygen inlet chamber, and communicates with the oxygen inlet to mix the air and oxygen in the mixing cavity. The air inlet is closer to the oxygen chamber, and when the patient uses the respirator to inhale, the fan module normally operates to pressurize the mixed gas flow of air and oxygen and deliver it to the patient's inhalation end, and forms a suction force on the air inlet chamber to suck external air. When the patient exhales, the fan module is paused or operates at a lower power, which greatly reduces the suction force on the air, oxygen and mixed gas flow, and the speed of external air entering is greatly reduced, while the oxygen source module continuously delivers oxygen to the oxygen inlet chamber and enters the mixing cavity through the oxygen inlet. At this time, this part of oxygen can flow into the air inlet chamber through the air inlet in the mixing cavity, and then be discharged to the outside of the gas flow module. Thus, the air flow resistance experienced by the patient during exhalation is greatly reduced, making exhalation more smooth and easy.

[0030] 3. As an embodiment of the present application, the mixing cavity has a mixed gas path between the air inlet and the air inlet, the mixed gas path has an inlet end and an outlet end, the air inlet is located at the inlet end, and a guide rib is provided at the oxygen inlet, and the guide rib is inclined to make the oxygen inlet inclined toward the outlet end. The oxygen inlet is located between the air inlet and the air inlet, and is inclined toward the air inlet, that is, the oxygen flows into the mixing cavity and flows in the mixed gas path during the flow of the air, so that the oxygen and air are mixed earlier to improve the mixing effect. Moreover, the flow direction of the oxygen is approximately the same as that of the air, so that the flow of the air is not greatly disturbed by the flow of the oxygen, the flow efficiency and direction of the gas flow are ensured, and the oxygen and air are not violently collided to avoid turbulence or turbulence to generate vibration or noise.

[0031] 4. As one embodiment of this application, the airflow module further includes a cover that can cover the mixing chamber. The fan module includes a fan and a silencer cover. The silencer cover has a protruding abutment portion that abuts against the cover to form a noise reduction cavity between the silencer cover and the cover. The protruding abutment portion of the silencer cover, after the cover closes the housing, abuts against the cover to form a sealed noise reduction cavity. The mixing chamber is located on the outer periphery of the noise reduction cavity. Air and oxygen enter the air inlet from the mixing chamber but do not enter the noise reduction cavity. The noise reduction cavity is a sealed chamber, which can effectively isolate noise, preventing noise from the internal airflow and the noise generated by the fan during operation from being transmitted to the outside through the air in the noise reduction cavity, thereby further improving the noise reduction effect of the airflow module.

[0032] 5. As one embodiment of this application, the ventilator airway module further includes an outlet tubing, which is connected to the air outlet. The outlet tubing has a return branch, which is connected to the mixing chamber. The fan module pressurizes the mixed airflow and delivers it to the patient input end through the outlet tubing. When the patient inhales, the mixed airflow flows towards the patient end at a certain pressure, which can promote the patient's inhalation and make the inhalation smoother, especially for patients who cannot breathe independently. The mixed airflow flowing towards the patient end at a certain pressure can replace the patient's inhalation action. However, when the patient exhales, if the outlet tubing is shared with the inhalation, the patient will exhale air to the fan outlet, which will encounter greater resistance, making the patient feel difficulty exhaling. In this embodiment, a return branch is set in the air outlet pipeline, so that when the patient exhales, the exhaled airflow can return to the mixing chamber through the return pipeline, which is the air inlet of the fan module. This allows the exhaled airflow to avoid the fan, thereby greatly reducing the resistance during exhalation and making it easier and smoother for the patient to exhale. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0034] Figure 1 is an exploded view of a portion of the ventilator structure according to one embodiment of this application;

[0035] Figure 2 is an assembly diagram of the gas path module and oxygen source module according to one embodiment of this application;

[0036] Figure 3 is a schematic diagram of the air circuit module according to one embodiment of this application;

[0037] Figure 4 is an exploded view of the gas path module in Figure 3;

[0038] Figure 5 is a schematic diagram of the internal structure of the air inlet chamber according to an embodiment of the present application, in which the arrows indicate the direction of air flow;

[0039] Figure 6 is a schematic diagram of the structure of the housing according to an embodiment of the present application, in which the arrows indicate the direction of air flow;

[0040] Figure 7 is a sectional view of the housing according to an embodiment of the present application, in which the arrows indicate the direction of air flow;

[0041] Figure 8 is an exploded view of the structure of the fan module according to an embodiment of the present application;

[0042] Figure 9 is a schematic diagram of one side of the structure of the housing according to an embodiment of the present application;

[0043] Figure 10 is a schematic diagram of the other side of the structure of the housing according to an embodiment of the present application;

[0044] Figure 11 is a schematic diagram of the assembly of the fan and the mounting seat according to an embodiment of the present application;

[0045] Figure 12 is an exploded view of the structure of the purge module according to an embodiment of the present application;

[0046] Figure 13 is a schematic diagram of the structure of the oxygen source module according to an embodiment of the present application;

[0047] Figure 14 is a sectional view of the oxygen source module according to an embodiment of the present application;

[0048] Figure 15 is a sectional view of the oxygen source module according to an embodiment of the present application, from another perspective;

[0049] Wherein: 1 gas path module; 11 shell; 111 first blocking rib; 1111 first separation section; 1112 second separation section; 112 second blocking rib; 113 first cavity; 114 second cavity; 12 gas inlet cavity; 13 oxygen inlet cavity; 131 oxygen inlet; 132 flow guide rib position; 133 oxygen inlet interface; 14 mixing cavity; 15 gas outlet pipeline; 151 gas pipe pressing plate; 16 cover; 17 mounting cavity; 171 mounting gap; 18 second cover; 19 backflow branch; 2 gas inlet module; 21 gas inlet; 22 gas outlet; 221 air inlet; 23 filter channel; 24 filter; 241 first filter part; 242 second filter part; 25 noise reduction channel; 251 buffer zone; 252 first noise reduction section; 253 second noise reduction section; 254 third noise reduction section; 255 gas outlet channel; 256 first airflow corner; 257 second airflow corner; 26 air outlet; 27 first airflow baffle; 271 flow dividing piece; 272 communication channel; 28 second airflow baffle; 281 flow guide camber; 3 oxygen source module; 31 valve seat; 311 oxygen inlet; 312 oxygen outlet; 313 oxygen outlet channel; 314 pressure reduction cavity; 315 diameter expansion section; 32 pressure sensor; 33 functional valve body; 331 pressure reduction valve; 332 proportional valve; 34 flow sensor; 35 air inlet filter element; 36 first filter element; 37 second filter element; 4 fan module; 41 fan; 42 soundproof cover; 421 communication port; 422 abutment part; 423 mixed flow cavity; 424 mixed gas pipeline; 425 noise reduction cavity; 426 isolation part; 43 mounting seat; 44 heat dissipation fin; 45 air inlet; 46 air outlet; 5 first damping element; 6 second damping element; 7 purge module; 71 control valve; 711 adjustment valve seat; 712 adjustment needle; 713 sealing ring; 72 air inlet branch; 73 purge branch; 74 detection pipeline. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0051] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0052] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0053] In this application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixedly" mean to be connected, fixedly connected, or integrated together, and can be, for example, fixedly connected, removably connected, or interconnected; can be, for example, mechanical connection, electrical connection, or communication connection; can be, for example, direct connection, or indirect connection via an intermediate medium; can be, for example, two elements internally interact with each other, or two elements interact with each other. The specific meaning of the above terms in the present application can be understood according to the specific circumstances by those skilled in the art.

[0054] In this application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the specification, the description of the terms "embodiment", "example", "one embodiment", "exemplary" or "specific example" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0055] As shown in FIG. 1, FIG. 4 to FIG. 6, an embodiment of the present application provides a breathing machine gas circuit module 1, which comprises a shell 11, an air inlet chamber 12, an oxygen inlet chamber 13 and a mixing chamber 14 are arranged in the shell 11, the air inlet chamber 12 and the mixing chamber 14 are separated by a first rib 111, the oxygen inlet chamber 13 and the mixing chamber 14 are separated by a second rib 112, the first rib 111 is provided with an air inlet 221 for communicating the air inlet chamber 12 and the mixing chamber 14, the second rib 112 is provided with an oxygen inlet 131 for communicating the oxygen inlet chamber 13 and the mixing chamber 14; a fan module 4, at least part of the fan module 4 is arranged in the mixing chamber 14, a mixing chamber 423 is formed between the fan module 4 and the inner wall of the mixing chamber 14, the fan module 4 is provided with an air inlet 45 and an air outlet 46, the air inlet 45 and the mixing chamber 423 are communicated.

[0056] In an embodiment of the present application, the air inlet chamber 12, the oxygen inlet chamber 13 and the mixing chamber 14 are all formed in the shell 11 and are separated by a plurality of ribs, and openings are provided on the ribs to communicate the chambers. On the one hand, the air inlet module 2, the oxygen inlet module and the mixing module can be arranged integrally and installed inside the shell 11, so that the internal air path module 1 of the breathing machine is completely integrated on the shell 11, which not only saves the connection of the structure and the air path, but also makes the arrangement of the modules more concentrated, effectively reduces the volume of the air path module 1, and helps to realize the miniaturization design of the breathing machine. On the other hand, the communication between the chambers is realized by the ribs and the openings on the ribs, so that the air path communication between the modules is realized by the internal structure of the shell 11, without the need for additional pipelines to connect the air paths between the modules, which greatly simplifies the structure of the air path module 1 and makes the air path module more simple, thereby facilitating the overall installation and removal of the air path module and the internal modules.

[0057] In addition, since the connecting pipeline is cancelled, the connection sealing between the modules will not be affected by the reliability of the pipeline connection. As long as the modules are installed in place, the passages inside the shell 11 can separate and communicate the chambers, greatly reducing the possibility of air leakage of the air path module 1, improving the use reliability and stability, and improving the use experience.

[0058] It should be noted that the breathing machine air path module 1 also includes an air inlet module 2 and an oxygen inlet module, and the air inlet module 2 and the oxygen inlet module are respectively provided with an air path structure. The air inlet module 2 and the oxygen inlet module can be directly formed in the corresponding air inlet chamber 12 and oxygen inlet chamber 13 to realize the integrated design of the air path module 1. In an embodiment, as shown in FIG. 4, the air inlet module 2 and the oxygen inlet module are independent of the shell 11, so that the air inlet module 2 and the oxygen inlet module can be installed into the air inlet chamber 12 and the oxygen inlet chamber 13 respectively, so that the air inlet module 2, the oxygen inlet module and the fan module 4 can be individually removed from the shell 11 as an independent module for cleaning or maintenance without the need to disassemble other modules, thereby reducing the maintenance difficulty. Specifically, as shown in FIG. 9, the air inlet module 2 and the oxygen inlet module are fixed to the shell 11 by screws.

[0059] It can be understood that the shell 11 is provided with a plurality of recess structures, and the recesses are separated by ribs. The air path module 1 also includes a cover 16, which, after covering the shell 11, cooperates with the recesses on the shell 11 to form the air inlet chamber 12, the oxygen inlet chamber 13 and the mixing chamber 14. When the cover 16 is removed, the chambers are exposed, which facilitates the removal or cleaning of the air path modules installed in the chambers.

[0060] The fan module 4 and the inner wall of the mixing chamber 14 form a mixing cavity 423, so that the air and oxygen are preliminarily mixed in the mixing cavity 423 before entering the fan module 4. In this process, the oxygen and air have been partially mixed, and the flow direction of the mixed gas flow is also guided in the mixing cavity 423 to become more regular, so that the air and oxygen and the mixed gas flow enter the inside of the fan module 4 in approximately the same direction, are further mixed and pressurized. In this way, not only the mixing effect of the air and oxygen can be improved, but also the noise generated by the collision or collision of the air and oxygen during the mixing process can be reduced, the wind noise inside the ventilator is reduced, the ventilator works more quietly, and the user experience is improved.

[0061] In an embodiment of the present application, as shown in FIGS. 6 and 9, the first barrier rib 111 has a first separation section 1111 and a second separation section 1112, and the air inlet 221 is located between the first separation section 1111 and the second separation section 1112. The air inlet chamber 12 and the oxygen inlet chamber 13 are separated by the second separation section 1112.

[0062] The air inlet 221 is located between the first separation section 1111 and the second separation section 1112, which ensures that the air inlet 221 does not directly communicate with the oxygen inlet chamber 13, avoids the air directly entering the oxygen inlet chamber 13, and respectively communicates with the oxygen inlet 311 and the mixing cavity 423, so that the air and oxygen are mixed in the mixing cavity 423. The air inlet 221 is closer to the oxygen chamber, when the patient uses the ventilator to inhale, the fan module 4 normally operates, pressurizes the mixed gas flow of air and oxygen, and delivers it to the patient's inhalation end, and forms a suction force on the air inlet chamber 12, so that external air is sucked in. When the patient exhales, the fan module 4 is paused or operates at a lower power, at which time the suction force on the air, oxygen and mixed gas flow is greatly reduced, the entering speed of external air is greatly reduced, and the oxygen source module 3 still continuously delivers oxygen to the oxygen inlet chamber 13 and enters the mixing cavity 423 through the oxygen inlet 131. At this time, the oxygen inlet chamber 13 can communicate with the outside atmosphere through the air inlet chamber 12, the oxygen entering the oxygen inlet chamber 13 can flow to the air inlet chamber 12 through the air inlet 221 in the mixing cavity 423, and then be discharged to the outside of the air flow module. Thus, the air flow resistance suffered by the patient during exhalation is greatly reduced, making the patient's exhalation more smooth and easy.

[0063] As shown in FIGS. 6 and 9, the oxygen inlet 131 is arranged away from the air inlet 221, so that the positions of the oxygen inlet and the air inlet in the mixing cavity 423 are far apart, appropriately reducing the kinetic energy of the oxygen and air when mixed, relieving the collision and collision between them, ensuring the flow efficiency, and reducing the noise generated when the two gas flows are mixed.

[0064] In an embodiment, as shown in FIG. 9, the first barrier rib 111 and the second barrier rib 112 are arranged vertically, in the view of the drawing, the first barrier rib 111 extends horizontally, the second barrier rib 112 extends vertically, and the first barrier rib 111 is located on the upper side of the second barrier rib 112, the upper side of the first barrier rib 111 forms the air inlet chamber 12, the second partition section 1112 of the first barrier rib 111 and the second barrier rib 112 form the oxygen inlet chamber 13, and the first partition section 1111 and the second barrier rib 112 form the mixing chamber 14. The air inlet 221 is arranged close to the oxygen inlet chamber 13, and the oxygen inlet 131 is arranged at the lower end of the second barrier rib 112.

[0065] In an embodiment, as shown in FIG. 6 and FIG. 9, the mixing chamber 423 has a mixing gas path 424 between the air inlet 221 and the air inlet 45, and the oxygen inlet 131 communicates with the mixing gas path 424.

[0066] The oxygen inlet 131 is located between the air inlet 221 and the air inlet 45, that is, the oxygen is mixed into the air during the process of the air flowing to the air inlet 45 in the mixing gas path 424, so that the oxygen and the air are mixed earlier, and the mixing effect is improved.

[0067] Further, as shown in FIG. 6 and FIG. 9, the mixing gas path 424 has an inlet end and an outlet end, the air inlet 221 is located at the inlet end, and the oxygen inlet 131 is provided with a flow guide rib position 132, which is arranged obliquely to make the oxygen inlet 131 obliquely face the outlet end.

[0068] The oxygen inlet 131 faces the outlet end of the mixing gas path 424, and the direction of the oxygen flowing into is approximately the same as the direction of the air flowing, so that the oxygen flowing into does not greatly interfere with the air flowing, ensuring the flow efficiency and direction of the air flow, avoiding the oxygen and the air colliding violently, and avoiding the occurrence of turbulence or turbulence to emit vibration or noise.

[0069] For example, in the view of the drawing, the mixing gas path 424 extends upward and downward, the upper end is the inlet end, and the lower end is the outlet end, the second barrier rib 112 forms the side wall of one side of the mixing gas path 424, and the oxygen inlet 131 obliquely faces downward. However, the inclination angle of the oxygen inlet 131 is not limited in this embodiment, since the oxygen inlet chamber 13 is located on one side of the mixing gas path 424, the oxygen inlet 131 can only flow into the mixing gas path 424 from one side, but as long as the direction of the oxygen inlet 131 is not perpendicular to the extension direction of the mixing gas path 424, but obliquely faces downward.

[0070] The present embodiment does not limit the setting position of the flow guide rib position 132. In one embodiment, as shown in FIG. 6, the end of the second blocking rib 112 cooperates with the inner wall of the shell 11 to enclose the oxygen inlet 131, and the flow guide rib position 132 is arranged on the inner wall of the shell 11. For example, as shown in FIG. 6 and FIG. 9, the inner wall of the shell 11 is curved to form an arc surface structure at the oxygen inlet 131 to constitute the flow guide rib position 132. Alternatively, the flow guide rib position 132 is designed as a structure independent of the shell 11, and guides the oxygen by being installed at the oxygen inlet 131 of the shell 11. In another embodiment, the end of the second blocking rib 112 cooperates with the inner wall of the shell 11 to enclose the oxygen inlet 131, or the oxygen inlet 131 is opened in the middle of the second blocking rib 112, and the flow guide rib position 132 is arranged on the second blocking rib 112 (which can be integrally formed with the second blocking rib 112 or separately formed and assembled to the second blocking rib 112) to guide the oxygen.

[0071] In one embodiment, as shown in FIG. 9, the cavity wall of the oxygen inlet chamber 13 is provided with an oxygen inlet interface 133 for connecting and communicating with the oxygen source module 3.

[0072] The oxygen inlet chamber 13 is a hollow structure, which is connected and communicated with the oxygen source module 3 through the oxygen inlet interface 133. The oxygen source module 3 serves as the oxygen source, and supplies oxygen into the oxygen inlet chamber 13 through the oxygen inlet interface 133. However, the oxygen output by the oxygen source module 3 has a relatively large pressure. After the oxygen enters the oxygen inlet chamber 13, the pressure of the oxygen will quickly decrease and diffuse in the cavity of the oxygen inlet chamber 13 due to the relatively large space in the oxygen inlet chamber 13, thereby effectively reducing the pressure of the oxygen and enabling the oxygen to be more fully mixed with the air.

[0073] In one embodiment, as shown in FIG. 13 to FIG. 15, the oxygen source module includes a valve seat 31 and at least one functional valve body 33 arranged in the valve seat 31. The valve seat 31 has an oxygen inlet 311 and an oxygen outlet 312, and the oxygen outlet 312 is connected and communicated with the oxygen inlet interface 133. The valve seat 31 is provided with an oxygen passage and a pressure reduction chamber 314. The oxygen passage is connected in sequence with each functional valve body 33, and then connected with the pressure reduction chamber 314, so that the oxygen in the oxygen source module also undergoes at least one pressure reduction, appropriately reduces the flow rate and pressure of the oxygen, and reduces the noise generated during the flow.

[0074] In an example, as shown in FIG. 13 and FIG. 14, the air inlet 21 is provided with an air filter 35 and a pressure sensor 32, the functional valve body 33 includes a pressure reducing valve 331 and a proportional valve 332, and the oxygen outlet 312 is provided with a flow sensor 34. In the flow direction of oxygen, the air filter 35 first filters the oxygen source to ensure the cleanliness of the oxygen source; then the pressure of the oxygen source is controlled by the pressure reducing valve 331, which facilitates the realization of oxygen mixing precision; the pressure sensor 32 monitors the oxygen pressure after pressure reduction in real time; then the proportional valve 332 is used to control the size of the oxygen flow output, thereby controlling the output oxygen concentration; and the oxygen flow sensor 34 outputs a flow signal, which facilitates the control of the software algorithm.

[0075] In an example, as shown in FIG. 15, the valve seat 31 is further provided with an oxygen outlet channel 313 inside, and the oxygen outlet channel 313 has a diameter expanding section 315 with gradually increasing flow area, so as to further reduce the oxygen pressure. The upstream of the diameter expanding section 315 is provided with a first filter 36, and the downstream of the diameter expanding section 315 is provided with a second filter 37, so as to pass through the two filters again when the oxygen is output, which can comb the airflow on the one hand and reduce the signal noise of the flow sensor 34, and reduce the aerodynamic noise of the output oxygen on the other hand.

[0076] In an example, as shown in FIG. 4 and FIG. 5, the ventilator gas path module 1 further includes an air inlet module 2 installed in the air inlet chamber 12, the air inlet chamber 12 includes an air inlet 21 and an air outlet 22, the air outlet 22 is in communication with an air inlet 221, and the air inlet module 2 includes a noise reduction channel 25 located in the air inlet chamber 12, one end of the noise reduction channel 25 is in communication with the air inlet 21, and the other end is in communication with the air outlet 22, and the noise reduction channel 25 includes at least two bending angles to change the flow direction of the gas at least twice during the flow process.

[0077] The present application does not limit the forming mode of the noise reduction channel 25, in an example, the inside of the shell 11 is provided with a partition rib to form the bending and extending noise reduction channel 25 in the air inlet chamber 12. In another example, as shown in FIG. 4, the air inlet module 2 includes a cooperating piece provided separately from the shell 11, the noise reduction channel 25 is provided on the cooperating piece, and the noise reduction channel 25 is embedded in the air inlet chamber 12 by assembling the cooperating piece in the air inlet chamber 12 of the shell 11. In yet another example, as shown in FIG. 5, part of the structure of the noise reduction channel 25 is formed on the cooperating piece provided separately from the shell 11, and the other part of the structure of the noise reduction channel 25 is formed by the cooperating piece and the shell 11 after the cooperating piece is assembled in the air inlet chamber 12, so that the two parts jointly form the complete noise reduction channel 25.

[0078] In an embodiment of the present application, one end of the noise reduction channel 25 is communicated with the air inlet 21, and the other end is communicated with the air outlet 22. After the external air enters the air inlet chamber 12, the air flows to the air outlet 22, and in the process, the air passes through the noise reduction channel 25. The noise reduction channel 25 includes at least two bending angles. On the one hand, the noise reduction channel 25 can play a role in air straightening, so that the air flowing in different directions in the air inlet chamber 12 is guided by the at least two bending angles and is turned in a unified direction, so that the air flow is more regular, the collision and turbulence between the air flowing in different directions are reduced, and the generation of vibration and noise is reduced. On the other hand, the noise reduction channel 25 is bent and extended, so that the flow path of the air in the air inlet chamber 12 is longer and more tortuous, the flow rate of the air is reduced to a certain extent, the whistling sound generated during the air flow is reduced, and the impact force of the air on the inner wall of the air inlet chamber 12 is reduced, and the noise generated by the collision is reduced. Moreover, the tortuous air path also lengthens the path of the sound wave, so that the noise in the noise reduction channel 25 is difficult to transmit to the outside, has a good noise reduction effect, and improves the use experience.

[0079] In an embodiment, the at least two bending angles are bent in the same direction, for example, the at least two bending angles are bent in the clockwise direction, so that at least part of the noise reduction channel 25 extends in a spiral manner, thereby saving the internal space of the air inlet chamber 12 and helping to realize miniaturization design. However, the bending direction of only part of the bending angles is limited here, and the bending angle of the bending angle is not limited, which can be bent at any angle, and the bending angle of each bending angle can be the same or different.

[0080] In an embodiment, the noise reduction channel 25 extends in a Z shape as a whole to form a bending angle at each of the two corners. In another embodiment, the noise reduction channel 25 extends in an S shape to make the bending angle more rounded.

[0081] In an embodiment of the present application, as shown in FIG. 5, first and second air flow baffles 27 and 28 are arranged in the noise reduction channel 25 along the air flow direction. The first and second air flow baffles 27 and 28 divide the noise reduction channel 25 into a first noise reduction section 252, a second noise reduction section 253, and a third noise reduction section 254 communicated in sequence. The first and third noise reduction sections 252 and 254 extend in a first direction, and the second noise reduction section 253 extends in a direction opposite to the first direction.

[0082] The air flows along the first noise reduction section 252, the second noise reduction section 253 and the third noise reduction section 254 in turn, and when switching between two noise reduction sections, a steering of about 180° is required, and the sound will be obviously reduced or eliminated when making a large-angle turn, so the extension directions of the three noise reduction sections are designed to make the airflow complete two large-angle steering in the noise reduction channel 25 in turn, which has a better noise reduction and elimination effect. At the same time, although the extension directions of the adjacent two noise reduction sections are opposite, the three noise reduction sections are still parallel to each other, so that the three noise reduction sections can be arranged side by side, thereby helping to reduce the volume of the noise reduction channel 25 and save the internal space of the air inlet chamber 12, thereby helping to realize the miniaturization of the breathing machine, and more convenient for family use.

[0083] In an embodiment, as shown in FIG. 5, the end of the first airflow baffle 27 and the shell 11 form a flow port, and a flow dividing piece 271 is arranged at the flow port to divide the flow port into at least two communication channels 272.

[0084] The flow port is used to communicate the first noise reduction section 252 and the second noise reduction section 253, and the flow dividing piece 271 is located at the flow port to divide the flow port into a plurality of communication channels 272, so that the air in the first noise reduction section 252 is divided into a plurality of streams at this position and enters the second noise reduction section 253. Since the air needs to be steered by about 180° at this position, the steering angle is large, and if a large air flow passes through the flow port, the air will collide with the inner wall of the noise reduction channel 25 in a high-speed flow state, thereby generating vibration or noise, and the air will also produce a loud whistle when it is steered. Therefore, the flow dividing piece 271 divides the air at the flow port, so that the airflow passes through the corner at a small flow rate, which can slow down the air flow and make the air steering more smooth and smooth, ensuring the flow efficiency while effectively reducing the noise.

[0085] In an embodiment, as shown in FIG. 5, the flow dividing piece 271 is a transverse rib extending from the end of the first airflow baffle 27, and the number of the rib can be one as shown in the figure to divide the flow port into two communication channels 272 arranged above and below, or the rib can be multiple and arranged at intervals above and below to form more communication channels 272. The other end of the flow dividing piece 271 can be in contact with the inner wall of the air inlet chamber 12, or there can be a gap between the other end of the flow dividing piece 271 and the inner wall of the air inlet chamber 12.

[0086] Of course, the flow dividing piece 271 can also be a rib extending from the inner wall of the air inlet chamber 12 towards the first airflow baffle 27, or the flow dividing piece 271 and the air inlet chamber 12 can be separately formed and assembled to the inner wall of the first airflow baffle 27 or the air inlet chamber 12, which is not limited here.

[0087] In an embodiment of the present application, as shown in FIG. 5, the end of the second air flow baffle 28 is provided with a flow guide camber 281 to make the air flow along the flow guide camber 281 from the second noise reduction section 253 to the third noise reduction section 254.

[0088] The air is guided by the flow guide camber 281 to achieve a smooth transition between the two noise reduction sections, improve the air flow efficiency, prevent the air flow from being turbulent, and reduce the noise caused by the air colliding with the inner wall of the noise reduction passage 25.

[0089] It should be noted that the present embodiment does not limit the forming method of the flow guide camber 281. In an embodiment, as shown in FIG. 5, the second air flow baffle 28 is a folded bending rib, and the bending part of the bending rib forms the flow guide camber 281. In an embodiment, as shown in FIG. 5, the bending rib is bent to form the flow guide camber 281 at the end, and the bending rib has two wall surfaces on both sides of the flow guide camber 281, wherein the two wall surfaces can be parallel, and the bending rib extends in a U shape. As shown in FIG. 5, the two wall surfaces of the bending rib are not parallel, and the distance between the two wall surfaces gradually decreases from the flow guide camber 281 to the other end, so that the width of the second noise reduction passage 25 and the third noise reduction passage 25 changes along the air flow direction.

[0090] In another embodiment, the second air flow baffle 28 can not be bent, and a circular arc surface is processed at the end of the second air flow baffle 28 to form the flow guide camber 281, which is not limited here.

[0091] As shown in FIG. 5, the flow area of the second noise reduction section 253 gradually decreases along the air flow direction, and the flow area of the third noise reduction section 254 gradually increases along the air flow direction.

[0092] When the air flows in the second noise reduction section 253, the flow area of the second noise reduction section 253 gradually decreases in the flow direction, so that the air pressure gradually increases when the air flows in the second noise reduction passage 25, and the flow rate of the air gradually increases, which can help the air to flow quickly through the second noise reduction section 253, ensure the air flow efficiency, and further ensure the intake efficiency of the breathing machine.

[0093] In the first direction, the flow area of the third noise reduction section 254 gradually increases, which increases the flow area of the third noise reduction section 254 at the outlet end, improves the air outflow efficiency, helps to form a relatively negative pressure at the air outlet 22, accelerates the air in the air inlet chamber 12 to flow towards the air outlet 22, and further improves the air inlet efficiency. At the same time, the air can flow out of the air outlet at a smaller air pressure, which can help to better mix with oxygen and avoid colliding or colliding with oxygen.

[0094] It should be noted that the flow area of the second noise reduction section 253 and the third noise reduction section 254 can be changed by changing the extension direction of the second air flow baffle 28, so that the width of the second noise reduction section 253 and the third noise reduction section 254 changes. The flow area of the second noise reduction section 253 and the third noise reduction section 254 can also be changed by setting the structure of the bottom of the noise reduction channel 25, so that the height of the channel of the second noise reduction section 253 and the third noise reduction section 254 changes, thereby changing the flow area. For example, the bottom wall of the noise reduction channel 25 gradually rises in the air flow direction in the area corresponding to the second noise reduction section 253, so that the height of the channel of the second noise reduction section 253 gradually decreases in the air flow direction. The bottom wall of the noise reduction channel 25 gradually decreases in the first direction in the area corresponding to the third noise reduction section 254, so that the height of the channel of the third noise reduction section 254 gradually increases in the air flow direction.

[0095] In addition, as shown in FIG. 5, the second air flow baffle 28 is arranged closer to the first air flow baffle 27 to further reduce the width of the second noise reduction section 253 and increase the width of the third noise reduction section 254.

[0096] In an embodiment, the noise reduction channel 25 further comprises a buffer zone 251, which is located upstream of the first noise reduction section 252, so that air enters the first noise reduction section 252 through the buffer zone 251. The buffer zone 251 and the first noise reduction section 252 have a first air flow corner 256 therebetween.

[0097] In an embodiment, the extension direction of the buffer zone 251 is perpendicular to the first noise reduction section 252 to form the first air flow corner 256 therebetween. The buffer zone 251 is perpendicular to the first noise reduction section 252, so that the angle of the first air flow corner 256 is 90°, so that the air flow is turned by about 90° when entering the first noise reduction section 252 from the buffer zone 251, thereby playing a role of straightening the air flow direction to make the air flow direction more consistent.

[0098] In other embodiments, the noise reduction channel 25 comprises a buffer zone 251 and a noise reduction zone that are in communication with each other, and the included angle between the buffer zone 251 and the noise reduction zone can also be other angles, as long as the air can be turned at this point to play a role of straightening the air flow, which is not limited herein.

[0099] In an embodiment, as shown in FIG. 5, the buffer zone 251 has an inlet, and the flow area of the buffer zone 251 is greater than that of the inlet. After the air enters the buffer zone 251, the pressure and flow rate will decrease rapidly, and then the air will diffuse in the noise reduction channel 25, thereby further reducing the air flow rate and kinetic energy and reducing the noise generated by the air flow.

[0100] As shown in FIG. 5, in an embodiment, the buffer zone 251 is a hollow structure. In other embodiments, a sound-absorbing material (such as sound-absorbing foam) can also be filled in the buffer zone 251 to further improve the sound-absorbing effect.

[0101] In an embodiment, as shown in FIG. 5, the noise reduction channel 25 further comprises an air outlet channel 255 that is in communication with the air outlet 22, and the extending direction of the air outlet channel 255 is perpendicular to the extending direction of the third noise reduction section 254, so as to form a second air flow corner 257 between the third noise reduction section 254 and the air outlet channel 255.

[0102] The air outlet channel 255 is used to guide the air in the air inlet chamber 12 to the air outlet 22, and the air is turned again when entering the air outlet channel 255, so as to further lengthen the air flow path and re-straighten the noise-reduced air, so that the air can enter the mixing chamber 14 through the air outlet 22, thereby improving the mixing effect of the air and oxygen.

[0103] In an embodiment, a surrounding rib is arranged at the air outlet 22, and the surrounding rib surrounds the air outlet channel 255. Of course, the air outlet channel 255 can also be formed in other ways, for example, the end of the noise reduction channel 25 is bent by 90° to form the air outlet channel 255.

[0104] It should be noted that the above-mentioned embodiments or examples can be implemented alone or in combination. For example, as an example, after the air enters the noise reduction channel 25, the air first enters the buffer zone 251 to be buffered, then is turned for the first time at the first air flow corner 256 between the buffer zone 251 and the first noise reduction section 252, then is turned for the second time in the first noise reduction section 252, the second noise reduction section 253 and the third noise reduction section 254 in turn, and finally is turned for the fourth time at the second air flow corner 257 of the air outlet channel 255 to enter the mixing chamber 14 from the air outlet 22. In this way, the air is turned for four times in the noise reduction channel 25.

[0105] In an embodiment of the present application, as shown in FIG. 5, the air inlet chamber 12 comprises a filter channel 23, one end of the filter channel 23 is in communication with the air inlet 21, and the other end of the filter channel 23 is in communication with the noise reduction channel 25.

[0106] The breathing machine can mix air and oxygen in a certain proportion to form mixed gas for the patient to inhale, wherein the air comes from the outside, and the outside air contains a lot of dust and impurities. When the outside air is sucked into the air inlet chamber 12, it first enters the filter channel 23 to be filtered, and then is noise-reduced and mixed.

[0107] Further, as shown in FIG. 5, the filter channel 23 is provided with a filter 24, and at least part of the filter 24 is arranged at the air inlet 21.

[0108] In an embodiment, the filter 24 comprises a first filter part 241 and a second filter part 242, the first filter part 241 is filter cotton and is arranged at the air inlet 21, and the second filter part 242 is arranged in the filter channel 23, so that after the ambient air enters from the air inlet 21, it passes through the filter cotton and the second filter part 242 in turn, and completes two filtrations in succession.

[0109] Further, the first filter part 241 is dust filter cotton, and the second filter part 242 is a HEPA filter.

[0110] Further, an air inlet grille is arranged at the air inlet 21 to shunt the ambient air into the air inlet chamber 12, and can filter large particles of impurities in the ambient air to ensure the cleanliness of the air.

[0111] Further, as shown in FIG. 5, an air passage 26 is arranged between the filter channel 23 and the noise reduction channel 25, and the flow area of the air passage 26 is smaller than the flow area of the filter channel 23 and / or the noise reduction channel 25.

[0112] After the air enters the air inlet chamber 12 from the air inlet 21, it first passes through the filter channel 23, and then enters the noise reduction channel 25 through the air passage 26. The flow area of the air passage 26 is smaller than that of the filter channel 23, so the filter 24 can reduce the flow rate of the air and make the air more dispersed. Therefore, the small-diameter air passage 26 can play a role in converging and rectifying the filtered air, and accelerate the air, so that the air enters the noise reduction channel 25 through the air passage 26 at a faster flow rate.

[0113] Since the flow area of the air passage 26 is smaller than that of the noise reduction channel 25, the air passing through the air passage 26 at a faster flow rate enters the noise reduction channel 25, and the space suddenly becomes open, so the pressure and flow rate of the air quickly decrease, and the air then diffuses in the noise reduction channel 25. Further, the effect of reducing the flow rate and kinetic energy of the air is achieved, so that the air is buffered when it first enters the noise reduction channel 25, and then passes through the noise reduction channel 25 in a slow flow rate, making the turning of the air more smooth, and the contact of the air with the inner wall of the noise reduction channel 25 more gentle, avoiding the air from colliding with the inner wall of the noise reduction channel 25 when turning and making noise.

[0114] Further, as shown in FIG. 5, the extension direction of the filter channel 23 is parallel to the extension direction of the buffer zone 251 of the noise reduction channel 25, so that the air enters the noise reduction channel 25 more smoothly.

[0115] In an embodiment of the present application, as shown in FIG. 3, FIG. 4, FIG. 6, FIG. 7, the air path module 1 further comprises a cover 16 capable of covering the mixing chamber 14, the fan module 4 comprises a fan 41 and a soundproof cover 42 located in the mixing chamber 14 and covering the outside of the fan 41, and the soundproof cover 42 is provided with a communication port 421 for communicating the mixing chamber 423 and the air inlet 45.

[0116] The soundproof cover 42 covers the outside of the fan 41, which can block the noise generated by the fan 41 during operation and the noise generated by vibration, and reduce the noise transmitted outward by the fan 41. At the same time, the arrangement of the soundproof cover 42 makes the airflow in the mixing chamber 423 unable to directly enter the inside of the fan 41, but enters the air inlet 45 through the communication port 421, thereby lengthening the airflow path and further relieving the noise generated by the airflow in the mixing chamber 423, and improving the noise reduction effect.

[0117] Further, as shown in FIG. 6, FIG. 9, the communication port 421 is located on the side of the mixing chamber 14 away from the air inlet 221.

[0118] For example, taking the viewing angle shown in the figure as an example, the air inlet 221 is located above the mixing chamber 14, the communication port 421 is located below the mixing chamber 14 and faces the lower side, and the oxygen inlet 131 is located between the two, which not only increases the path from the air inlet 221 to the communication port 421, but also completes the influx of oxygen during the air flow process, and completes the preliminary mixing.

[0119] Further, as shown in FIG. 6, FIG. 7, the soundproof cover 42 has a protruding abutting portion 422 facing the cover 16, and the abutting portion 422 abuts with the cover 16 to form a noise reduction chamber 425 between the soundproof cover 42 and the cover 16.

[0120] The protruding abutting portion 422 of the soundproof cover 42 forms a sealed noise reduction chamber 425 in cooperation with the cover 16 after the cover 16 covers the shell 11, the mixing chamber 423 is located at the outer periphery of the noise reduction chamber 425, and the air and oxygen enter the air inlet 45 from the mixing chamber 423 without entering the noise reduction chamber 425. The noise reduction chamber 425 is a sealed chamber, which can have a good isolation effect on noise, so that the noise of the internal airflow flow and the noise generated by the operation of the fan 41 cannot be transmitted to the outside through the air in the noise reduction chamber 425, thereby further improving the noise reduction effect of the air path module 1.

[0121] Further, as shown in FIG. 9, the outer side wall of the abutting portion 422 has an isolation portion 426 abutting with the inner side wall of the mixing chamber 14, and the isolation portion 426 divides the mixing chamber 423 into two flow channels, and the gas enters the fan 41 through the flow channel where the communication port 421 is located.

[0122] As shown in FIG. 9, the mixed flow cavity 423 extends along the outer periphery of the fan module 4, and after the air enters the mixed flow cavity 423 from the air inlet 221, the air can flow in two directions (counterclockwise or clockwise along the periphery of the fan module 4), and in this embodiment, the isolation portion 426 of the soundproof cover 42 abuts against the inner wall of the mixing chamber 14, thereby separating the mixed flow cavity 423 into two flow channels, and the communication port 421 is located in one of the flow channels, and the other flow channel is closed. Therefore, the oxygen and the air can only enter the communication port 421 along the flow channel in which the communication port 421 is located, and the air inlet 221 and the oxygen inlet 131 are both located on the path of the flow channel, so that the oxygen and the air can be mixed in advance, and the flow directions of the two air flows are more similar, thereby avoiding the collision between the air and the oxygen to form turbulence.

[0123] Further, for example, in the view shown in the figure, the air inlet 221 is located above the mixed flow cavity 423, the isolation portion 426 is located on the left side of the communication port 421, and the oxygen inlet 131 is located on the right side of the communication port 421, so that after the air enters the mixed flow cavity 423 from the air inlet 221, the left air duct is closed, and the air can only flow to the right side of the fan module 4 to the communication port 421, and before reaching the communication port 421, the oxygen is mixed, and the mixed air flow flows to the communication port 421.

[0124] As shown in FIG. 9, the isolation portion 426 can be a structure that protrudes outward from the abutting portion 422 to abut against the inner wall of the mixing chamber 14, or the mixing chamber 14 can be recessed inward at the position corresponding to the isolation portion 426 to abut against the isolation portion 426. As shown in FIG. 9, the isolation portion 426 can protrude outward, and the inner wall of the mixing chamber 14 can be recessed inward.

[0125] In this way, the external air enters the inside of the air inlet chamber 12 and completes multiple noise reduction in the noise reduction passage 25 in the air inlet chamber 12. The oxygen completes multiple noise reduction in the oxygen source module 3. The air and the oxygen complete multiple noise reduction in the mixing chamber 14, so that the air flow completes multiple-stage noise reduction in the air path module 1 of the present application, thereby greatly improving the noise reduction effect.

[0126] In an embodiment of the present application, as shown in FIGS. 7, 8 and 10, the shell 11 further includes a mounting chamber 17, and the mounting chamber 17 and the mixing chamber 14 are correspondingly arranged on both sides of the shell 11, and the fan module 4 is fixed in the mounting chamber 17, and the air inlet 45 extends to the inside of the mixing chamber 14 through the cavity wall of the mixing chamber 14.

[0127] The fan module 4 is fixed in the mounting chamber 17, which can leave a larger space for the air flow in the mixing chamber 14, thereby widening the flow area of the mixed flow cavity 423, and achieving the effect of reducing noise. The air flow in the mixed flow cavity 423 enters the inside of the fan module 4 through the air inlet 45.

[0128] In an embodiment, as shown in FIG. 8 and FIG. 10, a first damping member 5 is arranged between the inner wall of the mounting chamber 17 and the fan module 4, and the first damping member 5 is in abutment with the fan module 4 and the inner wall of the mounting chamber 17 respectively.

[0129] The first damping member 5 is in abutment between the fan module 4 and the inner wall of the mounting chamber 17, which can alleviate the vibration generated when the fan 41 is working, and avoid the shell 11 from being vibrated by the fan 41.

[0130] Further, the first damping member 5 is multiple and is arranged along the circumference of the fan module 4, so as to improve the damping effect and the positioning effect of the fan module 4. The first damping member 5 is made of a flexible material, such as soft rubber, so as to better absorb and buffer the vibration of the fan module 4.

[0131] In an embodiment, as shown in FIG. 11, the fan module 4 comprises a mounting seat 43 and a fan 41, and a second damping member 6 is arranged between the mounting seat 43 and the fan 41, so as to have a gap between the mounting seat 43 and the fan 41.

[0132] The gap between the mounting seat 43 and the fan 41 makes the vibration of the fan 41 unable to be transmitted to the mounting seat 43 by contact, so as to improve the stability and reduce the generation of vibration and noise. In addition, the mounting seat 43 and the fan 41 are in abutment through the second damping member 6, which not only makes the mounting seat 43 better support the fan 41, but also absorbs the vibration of the fan 41 by the second damping member 6, so as to improve the damping effect.

[0133] Further, the second damping member 6 is multiple and is arranged along the circumference of the fan 41, so as to improve the support stability of the fan 41. As shown in FIG. 11, the second damping member 6 is integrally formed with the mounting seat 43, or the second damping member 6 is separately formed with the mounting seat 43 and is assembled on the mounting seat 43 or the fan 41.

[0134] Further, as shown in FIG. 7 and FIG. 10, the fan module 4 and the inner wall of the mounting chamber 17 have a mounting gap 171, and the mounting gap 171 is filled with a noise reduction member. By filling the noise reduction member, such as sound-absorbing foam, in the space outside the circumference of the fan module 4, the noise generated by the vibration of the fan module 4 can be further absorbed.

[0135] Further, as shown in FIG. 8, the motor tail of the fan module 4 is further provided with a heat sink 44 for heat dissipation of the fan module 4.

[0136] In an embodiment, as shown in FIG. 8, the air path module 1 further comprises a second cover 18 for covering the installation chamber 17, the second cover 18 is provided with a matching port for matching with the motor output shaft of the fan module 4, so as to position the fan module 4.

[0137] In an embodiment, as shown in FIG. 4, the ventilator air path module 1 further comprises an air outlet pipeline 15, the air outlet pipeline 15 is connected and communicated with the air outlet 46, and the air outlet pipeline 15 is provided with a backflow branch 19 connected and communicated with the mixed flow cavity 423.

[0138] The fan module 4 pressurizes the mixed gas flow and then outputs the mixed gas flow to the patient end through the air outlet pipeline 15. When the patient inhales, the mixed gas flow flows to the patient end at a certain pressure, which can promote the patient to inhale and make the patient inhale more smoothly. Especially for patients who cannot breathe autonomously, the mixed gas flow flows to the patient end at a certain pressure, which can replace the patient's inhalation action. However, when the patient exhales, if the air outlet pipeline 15 is shared with inhalation, the patient will exhale to the air outlet 46 of the fan 41, which will cause a large impedance at this time, making the patient feel difficult to exhale. According to the embodiment, the backflow branch 19 is arranged on the air outlet pipeline 15, so that when the patient exhales, the exhaled gas flow can flow back to the mixed flow cavity 423, that is, the air inlet 45 of the fan module 4, so that the exhaled gas flow avoids the fan 41, thereby greatly reducing the impedance when exhaling, making the patient exhale more easily and smoothly, and improving the comfort of the patient.

[0139] Of course, the backflow branch 19 can also be connected and communicated with other parts in the air path module 1, as long as the connection position is upstream of the fan 41, which is not limited here.

[0140] In an embodiment, as shown in FIG. 1, FIG. 2 and FIG. 12, the air path module 1 further comprises an air outlet pipeline 15, an exhalation pipeline and a purge module, the air outlet pipeline 15 is connected and communicated with the air outlet 46, and the purge module comprises a control valve 71 and an air inlet branch 72 and a purge branch 73 connected and communicated with the control valve 71, respectively, the air inlet branch 72 is connected and communicated with the air outlet pipeline 15, and the purge branch 73 is connected and communicated with the exhalation pipeline.

[0141] The fan module 4 pressurizes the mixed gas flow and then outputs the mixed gas flow to the patient end through the air outlet pipeline 15. At the same time, part of the gas flow in the air outlet pipeline 15 flows to the control valve 71 through the air inlet branch 72, and further flows to the exhalation pipeline through the purge branch 73. Then, the exhalation pipeline is reversely purged (the purging direction is opposite to the patient's exhalation direction), so that the condensed water, sputum and the like remaining in the exhalation pipeline are blown out, thereby ensuring the cleanliness of the exhalation pipeline.

[0142] The purging process can be performed before the patient wears and uses the breathing machine, or after the patient uses the breathing machine, to avoid blowing impurities in the exhalation line to the patient end by the purging module.

[0143] The control valve 71 comprises a regulating valve seat 711 and a regulating needle 712 located inside the regulating valve seat 711, the regulating needle 712 is tapered and matched with a vent of the regulating valve seat 711, a sealing ring 713 is arranged between the regulating needle 712 and the vent, and the regulating needle 712 can be displaced forward and backward along the axis to adjust the size of the air flow of the vent. The purging module 7 further comprises a detection line 74, one end of which is connected with the control valve 71, and the other end is connected with a sensor.

[0144] Further, the air path module 1 further comprises an oxygen concentration detection device, which is in communication with the air outlet 46 of the fan module 4 or the gas outlet line 15, for detecting the oxygen concentration content after mixing of air and oxygen.

[0145] As shown in FIG. 4, one end of the gas outlet line 15 is connected to the air outlet 46 of the fan module 4 through an air tube pressing plate 151, and the other end is connected to a patient interface, the gas outlet line 15 is also in communication with the proximal flow sensor 34 through a line, which detects the size of the output air flow and feeds back to the control system for control, and each connection link is a sealed connection.

[0146] As shown in FIG. 1, the application further discloses a breathing machine, comprising the above-mentioned air path module 1, and further comprising an electrical module, the breathing machine has a first chamber 113 and a second chamber 114 inside, the electrical module is located in the first chamber 113, and at least part of the air path module 1 is located in the second chamber 114, so that the electrical module and the air path module 1 are arranged in different areas inside the breathing machine.

[0147] The two are arranged relatively independently, the air flow completely flows inside the air path module 1 and does not flow to the electrical module, and the arrangement of the electrical module does not affect the air duct inside the air path module 1, so that the work of the two modules does not affect each other. In addition, during maintenance or maintenance, the electrical module or the air path module 1 can be taken out from the inside of the shell alone for separate maintenance, for example, when the electrical module is removed, the air path module 1 does not need to be removed, and thus the air duct of the air path module 1 is not affected, thereby ensuring the sealing and connection reliability of the air ducts inside the air path module 1, and avoiding the sealing of the air ducts from being affected due to frequent assembly and disassembly. At the same time, when the electrical units of the electrical module are air-cooled and cooled, the air flow for cooling will not enter the air duct inside the air path module 1, and will not interfere with the flow of the internal air flow, thereby ensuring the reliable flow of the internal air flow of the air path module 1.

[0148] It should be noted that the application is arranged in an electrically separated manner, so that the main part of the gas path module 1 is arranged in the second cavity 114, but since the gas path module 1 needs to be connected with many pipelines, part of the area or part of the pipeline extends to the outside of the second cavity 114, which is not limited here.

[0149] The places not mentioned in the application can be realized by using or referring to the existing technology.

[0150] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments.

[0151] The above only describes the embodiments of the application and is not used to limit the application. The application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the scope of the claims of the application.

Claims

1. A ventilator gaspath module, wherein, The gas path module comprises: a shell, an air inlet chamber, an oxygen inlet chamber and a mixing chamber are arranged in the shell, the air inlet chamber and the mixing chamber are separated by a first partition rib, the oxygen inlet chamber and the mixing chamber are separated by a second partition rib, the first partition rib is provided with an air inlet for communicating the air inlet chamber and the mixing chamber, and the second partition rib is provided with an oxygen inlet for communicating the oxygen inlet chamber and the mixing chamber; a fan module, at least part of the fan module is arranged in the mixing chamber, a mixing chamber is formed between the fan module and the inner wall of the mixing chamber, the fan module is provided with an air inlet and an air outlet, and the air inlet and the mixing chamber are communicated.

2. The ventilator gaspath module of claim 1, wherein, The first partition rib has a first partition section and a second partition section, and the air inlet is located between the first partition section and the second partition section, and the air inlet chamber and the oxygen inlet chamber are separated by the second partition section.

3. The ventilator gaspath module of claim 2, wherein, The oxygen inlet is arranged away from the air inlet.

4. The ventilator gaspath module of claim 1, wherein, The mixing chamber has a mixed gas path between the air inlet and the air inlet, and the oxygen inlet is communicated with the mixed gas path.

5. The ventilator gaspath module of claim 4, wherein, The mixed gas path has an inlet end and an outlet end, the air inlet is located at the inlet end, and a guide rib position is arranged at the oxygen inlet, and the guide rib position is inclined to make the oxygen inlet inclined to the outlet end.

6. The ventilator gaspath module of claim 5, wherein, The second partition rib cooperates with the shell to form the oxygen inlet, and the guide rib position is arranged on the second partition rib and / or the shell.

7. The ventilator gaspath module of claim 1, wherein, The cavity wall of the oxygen inlet chamber is provided with an oxygen inlet interface for connecting with an oxygen source module.

8. The ventilator gaspath module of claim 1, wherein, The gas path module further comprises a cover body capable of covering the mixing chamber, the fan module comprises a fan and a sound insulation cover, the sound insulation cover is located in the mixing chamber and covers the outer side of the fan, and the sound insulation cover is provided with a communication port for communicating the mixing chamber and the air inlet.

9. The ventilator gaspath module of claim 8, wherein, The communication port is located on the side of the mixing chamber away from the air inlet.

10. The ventilator gaspath module of claim 8, wherein, The sound insulation cover has a protruding abutting portion towards the cover body, and the abutting portion abuts with the cover body to form a noise reduction chamber between the sound insulation cover and the cover body.

11. The ventilator gaspath module of claim 10, wherein, The outer side wall of the abutting portion has an isolation portion abutting with the inner side wall of the mixing chamber, and the isolation portion divides the mixing chamber into two flow channels, and the gas enters the fan through the flow channel where the communication port is located.

12. The ventilator gaspath module of claim 1, wherein, The shell further comprises a mounting chamber, the mounting chamber and the mixing chamber are correspondingly arranged on two sides of the shell, the fan module is fixed in the mounting chamber, and the air inlet extends to the inside of the mixing chamber through the cavity wall of the mixing chamber.

13. The ventilator gaspath module of claim 12, wherein, A first damping member is arranged between the inner wall of the mounting chamber and the fan module, and the first damping member abuts with the inner wall of the mounting chamber and the fan module respectively.

14. The ventilator gaspath module of claim 12, wherein, The fan module comprises a mounting seat and a fan, and a second damping member is arranged between the mounting seat and the fan to have a gap between the mounting seat and the fan.

15. The ventilator gaspath module of claim 12, wherein, The fan module and the inner wall of the mounting chamber have a mounting gap, and a noise reduction member is filled in the mounting gap.

16. The ventilator gaspath module of claim 1, wherein, The ventilator gas path module further comprises an air outlet pipeline, the air outlet pipeline is in communication with the air outlet, and the air outlet pipeline is provided with a backflow branch, the backflow branch is in communication with the mixed flow cavity.

17. The ventilator gaspath module of claim 1, wherein, The gas path module further comprises an air outlet pipeline, an exhalation pipeline and a purge module, the air outlet pipeline is in communication with the air outlet, the purge module comprises a control valve and an air inlet branch and a purge branch in communication with the control valve, the air inlet branch is in communication with the air outlet pipeline, and the purge branch is in communication with the exhalation pipeline.

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