One-way valve for ventilator

Abstract

The invention discloses a one-way valve for a ventilator, comprising: a housing component, the housing component comprising a flow channel, the flow channel being provided with an exhaust port; a flow guide component, the flow guide component being provided in the flow channel, the flow guide component comprising a first flow blocking kit and a second flow blocking kit arranged at intervals along the axial direction of the flow channel, a first flow opening being provided between the first flow blocking kit and the inner wall of the flow channel, the first flow blocking kit being inclined toward the exhaust port with the end away from the first flow opening as a reference, the second flow blocking kit being inclined in the same direction as the first flow blocking kit, the second flow blocking kit being opposite to the first flow opening, and the projection surface of the second flow blocking kit on the cross section of the flow channel completely covering the projection surface of the first flow opening on the cross section of the flow channel. The invention can effectively prevent gas reflux, can prevent the airflow of the humidifier and the patient end from flowing back to the inside of the ventilator, effectively prevent the invasion of water vapor and pathogens inside the ventilator, and protect the internal components from being corroded by water vapor and contaminated by pathogens.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a one-way valve for a ventilator. Background Art

[0002] A ventilator is a vital medical device that can prevent and treat respiratory failure, reduce complications, and save and prolong the life of patients. In modern clinical medicine, as an effective means of artificially replacing the spontaneous ventilation function, it has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support therapy, and emergency resuscitation. It occupies a very important position in the field of modern medicine. When using a ventilator, an external humidifier is generally required. During the patient's breathing process, the direction of the airflow will change. When the patient inhales, the airflow is sent out from the inspiratory branch of the ventilator and reaches the patient end through the humidifier. During this process, the humidifier will heat and humidify the airflow. When the patient exhales, the machine stops supplying air. Due to the end-expiratory pressure in the expiratory branch or the leak hole, part of the patient's exhaled airflow will pass through the humidifier and enter the inspiratory branch. The airflow entering the inspiratory branch encounters the tube wall with a lower temperature, and the water vapor will condense into liquid water on the tube wall. After being purged by the airflow, it is blown into the ventilator, causing the internal components of the ventilator to fail under the long-term erosion of condensed water, affecting the service life of the ventilator.

[0003] The existing technical solution mainly uses a diaphragm-type one-way valve to prevent condensed water from entering the internal components of the ventilator, and realizes the function of one-way gas flow by fixing a silicone diaphragm on a bracket. The silicone diaphragm is fixed on one side of the bracket. During forward ventilation, the diaphragm is blown open, and during reverse ventilation, the diaphragm is pressed against the bracket. The sealing is achieved by pressing the silicone diaphragm and the bracket, thereby realizing the function of one-way ventilation.

[0004] The main problems with the existing technical solutions are: sealing is achieved by opening and closing the silicone diaphragm and the bracket. When the diaphragm is opened and closed, the impact between the diaphragm and the bracket will increase the noise level of the whole machine and affect the actual use experience of the whole machine; at the same time, in order to achieve a rapid response of the silicone diaphragm and reduce the resistance of the silicone diaphragm to the airflow, the thickness of the silicone diaphragm is generally thin, and the silicone diaphragm may be damaged after long-term use. Once the silicone diaphragm is damaged, it cannot prevent the reverse flow of airflow, which seriously limits the service life and also brings certain safety hazards to patients. Summary of the invention

[0005] In order to solve the defects of the diaphragm type one-way valve used in the ventilator in the prior art, such as high noise and easy damage of the diaphragm, the present application proposes a new type of one-way valve for the ventilator.

[0006] The technical solution adopted by the invention is: a one-way valve for a ventilator, comprising: a shell component, the shell component comprising a flow channel, the flow channel is provided with an exhaust port; a flow guide component, the flow guide component is arranged in the flow channel, the flow guide component comprises a first flow baffle kit and a second flow baffle kit arranged at intervals along the axial direction of the flow channel, a first flow opening is provided between the first flow baffle kit and the inner wall of the flow channel, the first flow baffle kit is inclined toward the exhaust port with the end away from the first flow opening as a reference, the second flow baffle kit has the same inclination as the first flow baffle kit, the second flow baffle kit is opposite to the first flow opening, and the projection surface of the second flow baffle kit on the cross section of the flow channel completely covers the projection surface of the first flow opening on the cross section of the flow channel.

[0007] Furthermore, the flow channel is also provided with an air inlet, and the first flow baffle kit includes a first baffle, and the first flow opening is formed between the first baffle and the inner wall of the flow channel, and the first baffle has an arc, and the outer arc surface of the first baffle faces the air inlet, and the inner arc surface faces the exhaust port.

[0008] Furthermore, the first flow baffle kit also includes at least one first rectifying plate, the first rectifying plate is close to the air inlet, the first rectifying plate is close to the exhaust port, the first rectifying plate is arranged in the middle of the flow channel, and a second flow port and a third flow port are formed between the two ends of the first rectifying plate and the inner wall of the flow channel, the second flow port is opposite to the first flow port, and the third flow port is opposite to the first deflector.

[0009] Furthermore, the second baffle kit includes a second baffle, a fourth flow opening is formed between the second baffle and the inner wall of the flow channel, the second baffle has an arc, the outer arc surface of the second baffle faces the air inlet, and the inner arc surface faces the exhaust port.

[0010] Furthermore, the second flow baffle kit also includes at least one second straightening plate, the second straightening plate is close to the air inlet, the second straightening plate is close to the exhaust port, the second straightening plate is arranged in the middle of the flow channel, and a fifth flow port and a sixth flow port are formed between the two ends of the second straightening plate and the inner wall of the flow channel, the fifth flow port is opposite to the fourth flow port, and the sixth flow port is opposite to the second straightening plate.

[0011] Furthermore, the projection areas of the first flow opening and the fourth flow opening on the flow passage cross section are smaller than one half of the flow passage cross section area.

[0012] Furthermore, the housing assembly includes a pipe sleeve and a sealing sleeve. A positioning protrusion is provided on the outside of the sealing sleeve. Both ends of the sealing sleeve are provided with annular stops. The guide assembly is provided between the two annular stops of the sealing sleeve.

[0013] Further, the first baffle kit includes: a first outer ring, a first baffle and a first rectifying plate, the first baffle and the first rectifying plate are arranged on the inner side of the first outer ring, and the first baffle and the first rectifying plate are used for guiding flow; the second baffle kit includes: a second outer ring, a second baffle and a second rectifying plate, the second baffle and the second rectifying plate are arranged on the inner side of the second outer ring, and the second baffle and the second rectifying plate are used for guiding flow; the end faces of the first outer ring and the second outer ring abut against each other and are installed in the sealing sleeve.

[0014] Further, the first outer ring includes: a first baffle outer ring, the first baffle plate is arranged in the first baffle outer ring; a first rectifying outer ring, the first rectifying plate is arranged in the first rectifying outer ring; the second outer ring includes: a second baffle outer ring, the second baffle plate is arranged in the second baffle outer ring; a second rectifying outer ring, the second rectifying plate is arranged in the second rectifying outer ring; the first baffle outer ring and the second baffle outer ring are both standard baffle outer ring parts, and the first baffle outer ring and the second baffle outer ring are 180° away from the axis; the first rectifying outer ring and the second rectifying outer ring are both standard rectifying outer ring parts, and the first rectifying outer ring and the second rectifying outer ring are 180° away from the axis.

[0015] Furthermore, each of the two circumferential surfaces of the deflector outer ring standard part is provided with a positioning protrusion, and the two positioning protrusions are symmetrically distributed with respect to the cross-section of the deflector outer ring standard part; each of the two circumferential surfaces of the rectifying outer ring standard part is provided with a positioning groove, and the position correspondence between one positioning groove and another positioning groove is: symmetrical with respect to the cross-section of the rectifying outer ring standard part and rotated 180° with respect to the axial direction of the rectifying outer ring standard part.

[0016] Compared with the prior art, the present invention arranges a first flow baffle kit and a second flow baffle kit in the flow channel, and the gas from the air inlet of the flow channel is smoothly conducted to the exhaust port through the first flow baffle kit and the second flow baffle kit. Both the first flow baffle kit and the second flow baffle kit are inclined to the exhaust port. The second flow baffle kit is opposite to the first flow port, and the projection surface of the second flow baffle kit on the cross section of the flow channel completely covers the projection surface of the first flow port on the cross section of the flow channel, which can effectively prevent gas reflux and prevent the airflow of the humidifier and the patient end from flowing back to the inside of the ventilator, effectively preventing the invasion of water vapor and pathogens inside the ventilator, and protecting the internal devices from corrosion by water vapor and contamination by pathogens.

[0017] At the same time, compared with the existing solutions, this solution does not use a movable silicone diaphragm. The first flow baffle kit and the second flow baffle kit are fixedly arranged in the flow channel, which can effectively reduce the noise of the whole machine and effectively reduce the failure rate of the one-way valve, improve the operating stability of the product, and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the one-way valve in the present invention;

[0020] Figure 2 It is a schematic diagram of the explosion structure of the one-way valve in the present invention;

[0021] Figure 3 It is a schematic cross-sectional structure diagram of a one-way valve in the first embodiment of the present invention;

[0022] Figure 4 It is a schematic cross-sectional structure diagram of a one-way valve in a second embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of the airflow state when the patient inhales in the present invention;

[0024] Figure 6 It is a schematic diagram of the airflow state when the patient exhales in the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the baffle outer ring standard component in the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the rectifier outer ring standard component in the present invention.

[0027] 1. Shell assembly; 11. Pipe sleeve; 12. Sealing sleeve; 121. Annular gear; 2. Flow guide assembly; 21. First flow blocking kit; 211. First deflector; 212. First flow port; 213. First rectifier; 214. Second flow port; 215. Third flow port; 216. First outer ring; 217. First baffle outer ring; 218. First rectifier outer ring; 22. Second flow blocking kit; 221. Second deflector; 222. Fourth flow port; 223. Second rectifier; 224. Fifth flow port; 225. Sixth flow port; 226. Second outer ring; 227. Second baffle outer ring; 228. Second rectifier outer ring; 3. Flow channel; 31. Air inlet; 32. Exhaust port; 4. Baffle outer ring standard parts; 41. Positioning protrusion; 5. Rectifier outer ring standard parts; 51. Positioning groove. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] The present invention provides a one-way valve for a ventilator. Figure 1 , 2 As shown, the one-way valve in the present invention includes two parts: a shell component 1 and a flow guide component 2. The shell component 1 includes an internal flow channel 3. One end of the flow channel 3 is provided with an air inlet 31, and the other end is provided with an exhaust port 32. One end of the air inlet 31 is connected to the ventilator, and one end of the exhaust port 32 is connected to the humidifier on the patient's side. The function of the one-way valve is to ensure that when the patient inhales, the gas can only flow from the ventilator to the patient, and when the patient exhales, the gas will not flow back from the one-way valve to the inside of the ventilator; the flow guide component 2 is arranged in the flow channel 3, and the flow guide component 2 is used to guide the flow direction of the gas. It is a key structure to prevent the gas from flowing back to the ventilator. The flow guide component 2 in the present application includes a first flow blocking kit 21 and a second flow blocking kit 22. The first flow blocking kit 21 and the second flow blocking kit 22 are arranged at intervals along the axial direction of the flow channel 3, and the arrangement method includes but is not limited to: A first baffle kit 21 and a second baffle kit 22; a first baffle kit 21, a second baffle kit 22 and a first baffle kit 21; or a first baffle kit 21, a second baffle kit 22, a first baffle kit 21 and a second baffle kit 22; wherein, a first flow opening 212 is provided between the first baffle kit 21 and the inner wall of the flow channel 3, the first baffle kit 21 is inclined toward the exhaust port 32 with the end away from the first flow opening 212 as a reference, the second baffle kit 22 has the same inclination as the first baffle kit 21, and the second baffle kit 22 is opposite to the first flow opening 212, and the projection surface of the second baffle kit 22 on the cross section of the flow channel 3 completely covers the projection surface of the first flow opening 212 on the cross section of the flow channel 3, thereby playing the role of guiding the airflow from the air inlet 31 to the exhaust port 32 and preventing the gas from flowing back to the air inlet 31.

[0030] Furthermore, the first baffle kit 21 includes a first deflector 211 and at least one first rectifier plate 213. Since most of the flow path structures on the market are circular, the circular flow path is introduced as the basic design in this embodiment, but at the same time, flow paths of other shapes should be included in the protection scope of this application; the first baffle plate 211 is designed to be arched, and the curved side of the first baffle plate 211 is fitted and connected to the inner wall of the flow channel 3, and the straight side of the first baffle plate 211 is located inside the flow channel 3, and the straight side of the first baffle plate 211 leaves a gap with the inner wall of the flow channel 3. There is an opening, which is the first flow port 212. In the present embodiment, the first baffle 211 has an arc, the outer arc surface of the first baffle 211 faces the air inlet 31, and the inner arc surface faces the exhaust port 32. Designing the plate surface of the first baffle 211 to have an arc surface can achieve a good flow guiding effect, reduce the resistance of the ventilator's air intake, and ensure smooth breathing of the patient. In other alternative embodiments, the first baffle 211 can also be designed as an ordinary flat surface. Although this plate surface can also play a role in guiding flow, the air resistance is relatively large, which is not conducive to the patient's inhalation. The first baffle plate 211 is close to the air inlet 31, the first rectifier plate 213 is close to the exhaust port 32, and the first rectifier plate 213 is arranged in the middle of the flow channel 3, so two openings are formed between the first rectifier plate 213 and the inner wall of the flow channel 3, which are named as the second flow port 214 and the third flow port 215, wherein the second flow port 214 is opposite to the first flow port 212, and the third flow port 215 is opposite to the first baffle plate 211, so that the second flow port 214 will not affect the gas flow of the first flow port 212, and the design of the third flow port 215 can ensure that when the gas flows in from the exhaust port 32, Part of the gas can come into contact with the inner arc surface of the first baffle plate 211, and the inner arc surface will continue to guide the gas entering from the exhaust port 32 to the second flow port 214, and send it out of the exhaust port 32 from the second flow port 214. Therefore, the design of the first rectifier plate 213 can ensure that the first baffle plate 211 has a good effect of guiding the airflow, and the gas of the exhaust port 32 is diverted to avoid the noise caused by the huge impact of the gas entering and exiting from a channel. To a certain extent, it can play a better noise reduction role, and such a design can greatly improve the service life of the product and reduce the failure rate of the product.

[0031] Furthermore, the second flow baffle kit 22 in the present application can adopt the same design concept or a different design concept. In this embodiment, in order to reduce design costs and manufacturing costs, the second flow baffle kit 22 and the first flow baffle kit 21 are designed with the same template. The second flow baffle kit 22 and the first flow baffle kit 21 only have a certain difference in installation angle. In order to ensure that the second flow baffle kit 22 is opposite to the first flow opening 212, the first flow baffle kit 21 and the second flow baffle kit 22 in this embodiment are spaced apart, and the second flow baffle kit 22 forms a 180° deviation with the first flow baffle kit 21, thereby ensuring that the first flow baffle kit 21 completely covers the first flow opening 212. Specifically, the second baffle kit 22 includes a second baffle plate 221 and at least one second rectifier plate 223. The second baffle plate 221 is designed to be arched. The curved side surface of the second baffle plate 221 is fitted and connected to the inner wall of the flow channel 3. The straight side surface of the second baffle plate 221 is located inside the flow channel 3. An opening is left between the straight side surface of the second baffle plate 221 and the inner wall of the flow channel 3. The opening is a fourth flow port 222. In this embodiment, the second baffle plate 221 has an arc. The outer arc surface of the second baffle plate 221 faces the first baffle plate 211, and the inner arc surface faces the exhaust port 32. Designing the plate surface of the second baffle plate 221 to have an arc surface can have a good guiding effect, reduce the resistance of the ventilator's air intake, and ensure smooth breathing of the patient. In other alternative embodiments, the second baffle plate 221 can also be designed as an ordinary flat surface. Although this plate surface can also play a guiding role, the air resistance is relatively large, which is not conducive to the patient's inhalation.The second deflector 221 is close to the first deflector 211 and is opposite to the first flow port 212, and the fourth flow port 222 is opposite to the first baffle kit 21, so that the first flow port 212 and the fourth flow port 222 are actually staggered with each other, which is used to guide the gas of the first flow port 212 to flow out from the fourth flow port 222; the second rectifier 223 is close to the exhaust port 32, and the second rectifier 223 is arranged in the middle of the flow channel 3, so two openings are formed between the second rectifier 223 and the inner wall of the flow channel 3, which are named as the fifth flow port 224 and the sixth flow port 225, wherein the fifth flow port 224 is opposite to the fourth flow port 222, and the sixth flow port 225 is opposite to the second deflector 221, so that the fifth flow port 224 will not affect The gas flows through the fourth flow port 222, and the design of the sixth flow port 225 can ensure that when the gas flows in from the exhaust port 32, a part of the gas can contact the inner arc surface of the second baffle plate 221, and the inner arc surface will continue to guide the gas entering from the exhaust port 32 to the fifth flow port 224, and send it out of the exhaust port 32 from the fifth flow port 224. Therefore, the design of the second rectifier plate 223 can ensure that the second baffle plate 221 has a good effect of guiding the airflow, and the gas of the exhaust port 32 is diverted to avoid the noise caused by the huge impact brought by the gas entering and exiting from one channel. To a certain extent, it can play a better noise reduction role, and such a design can greatly improve the service life of the product and reduce the failure rate of the product.

[0032] It should be noted that, in other embodiments, it is also feasible to design the first baffle 211 and / or the second baffle 221 as a straight plate body.

[0033] Preferably, the projected areas of the first flow port 212 and the fourth flow port 222 on the cross section of the flow channel 3 are less than one half of the cross-sectional area of ​​the flow channel 3. This ensures that when the second flow baffle kit 22 and the first flow baffle kit 21 adopt the same template, the first flow port 212 can be opposite to the second deflector 221, and the fourth flow port 222 can also be opposite to the first deflector 211, thereby greatly reducing the accuracy of design and installation, ensuring the formation of a deflection of the gas entering the exhaust port 32, and avoiding the gas from flowing back from the inlet to the inside of the ventilator.

[0034] Furthermore, the shell component 1 and the guide component 2 can be designed into various styles of assembly forms according to actual needs, such as an integrated structure and an assembled structure. In order to better reduce the assembly and design costs and achieve more flexible assembly forms and matching, the assembly structure of the shell component 1 and the guide component 2 is also optimized in this application.

[0035] See attached Figure 4 , 5When the gas flows in the forward direction (from the air inlet 31 to the exhaust port 32), the airflow first passes through the outer curved surface of the first deflector 211, the airflow direction changes, and flows along the outer curved surface, and then passes through the rectifying plate without changing the airflow direction; when encountering the second deflector 221, the airflow direction changes, flows along the outer curved surface, and then flows out of the exhaust port 32 after passing through the rectifying plate.

[0036] See attached Figure 4 , 6 When the gas flows in the opposite direction (from the exhaust port 32 to the air inlet 31), the airflow first passes through the second rectifying plate 223 and is divided into two parts by the second rectifying plate 223. One part passes through the sixth flow port 225 and is changed in flow direction by the second deflector 221. When passing through the second deflector 221, the direction is changed again and flows along the inner curved surface of the second deflector 221. When the airflow flows out along the second deflector 221, it meets the reverse flow airflow. Since the second deflector 221 changes the direction of the airflow, the airflow has a backward flow velocity component. Therefore, when meeting the reverse airflow, the reverse flow airflow velocity is offset, the resistance of the gas reverse flow increases, and the airflow flowing to the air inlet 31 decreases. Another part of the airflow flows toward the first baffle kit 21 through the fourth flow port 222 and the fifth flow port 224. When the airflow flows through the first rectifying plate 213 and the first deflector 211, the airflow velocity of the reverse flow is further offset, and the resistance of the reverse flow is further increased. After multiple flow direction changes and offsets, the airflow to the air inlet 31 can be reduced to an acceptable range, thereby achieving the purpose of the airflow only flowing in the forward direction and not in the reverse direction.

[0037] The present application can effectively prevent gas reflux, prevent the airflow from the humidifier and the patient end from flowing back to the inside of the ventilator, effectively prevent the intrusion of water vapor and germs inside the ventilator, and protect the internal components from being corroded by water vapor and contaminated by germs. At the same time, compared with the existing solutions, it can effectively reduce the noise of the whole machine, effectively reduce the failure rate of the one-way valve, improve the operating stability of the product, and reduce maintenance costs.

[0038] For details, see the attached Figure 2 , 4As shown, in the present application, the housing component 1 is designed to include a pipe sleeve 11 and a sealing sleeve 12. The pipe sleeve 11 is arranged in the outermost layer. The pipe sleeve 11 has high toughness and hardness, and can provide good protection for the entire one-way valve structure. The sealing sleeve 12 is made of silicone material, and the sealing sleeve 12 is sleeved inside the pipe sleeve 11. A sealing ring is also provided between the sealing sleeve 12 and the pipe sleeve 11 to improve the matching degree between the sealing sleeve 12 and the pipe sleeve 11, reduce the gap, form a good sealing effect, and avoid the defect that the sealing sleeve 12 shakes in the gap and generates noise. The sealing sleeve 12 is the above-mentioned embodiment. The flow channel 3 and the sealing sleeve 12 are used to ensure the sealing of the flow channel 3. The guide component 2 is installed in the sealing sleeve 12 to realize the function of unidirectional airflow. Through this installation method, during assembly, it is only necessary to adjust the position of the guide component 2 first, install the fixed guide component 2 into the sealing sleeve 12, and finally insert the sealing sleeve 12 into the pipe sleeve 11 and fix it. By adopting such a package method, each component is split and designed, and the user can flexibly disassemble or replace accessories according to needs or functions, which not only successfully reduces the design and manufacturing costs, but also realizes low-cost maintenance in the later stage.

[0039] Furthermore, annular stops 121 are designed at the front and rear end surfaces of the sealing sleeve 12, and the guide component 2 is arranged between the two annular stops 121 of the sealing sleeve 12. The annular stops 121 can axially constrain the guide component 2 to prevent the guide component 2 from shifting when airflow blows through.

[0040] For further information, see Appendix Figure 3 In the first embodiment, the flow guide assembly 2 is modularly designed. The first flow baffle assembly 21 includes: a first outer ring 216, a first baffle plate 211 and a first rectifying plate 213, and the first baffle plate 211 and the first rectifying plate 213 are arranged on the inner side of the first outer ring 216; the second flow baffle assembly 22 includes: a second outer ring 226, a second baffle plate 221 and a second rectifying plate 223, and the second baffle plate 221 and the second rectifying plate 223 are arranged on the inner side of the second outer ring 226; the flow guide assembly 2 is formed by positioning the end faces of the first outer ring 216 and the second outer ring 226 against each other and installing them together in the sealing sleeve 12 to realize the one-way valve function. In this embodiment, the first flow baffle assembly 21 and the second flow baffle assembly 22 are modularly designed respectively. The user can freely match the number and arrangement of the first flow baffle assembly 21 and the second flow baffle assembly 22 according to actual conditions, which is also convenient for replacing the first flow baffle assembly 21 and the second flow baffle assembly 22 later.

[0041] For further information, see Appendix Figure 2 , 4, 7, 8, in the second embodiment, the modular split design can also be continued on the basis of the modular design of the first baffle kit 21 and the second baffle kit 22, such as: the first outer ring includes a first baffle outer ring 217 and a first rectifying outer ring 218, the first baffle plate 211 is arranged in the first baffle outer ring 217, and the first rectifying plate 213 is arranged in the first rectifying outer ring 218; the second outer ring includes a second baffle outer ring 227 and a second rectifying outer ring 228, the second baffle plate 221 is arranged in the second baffle outer ring 227, and the second rectifying plate 223 is arranged in the second rectifying outer ring 228; the first baffle outer ring 217 and the second baffle outer ring 227 are both designed as baffle outer ring standard parts 4, and the first rectifying plate 211 is arranged in the first baffle outer ring 217, and the first rectifying plate 213 is arranged in the first rectifying outer ring 218. The outer ring 218 and the second rectifying outer ring 228 are both standard rectifying outer ring parts 5. During installation, it is only necessary to ensure that the first baffle outer ring 217 and the second baffle outer ring 227 are docked at an axial deviation of 180°, and the first rectifying outer ring 218 and the second rectifying outer ring 228 are docked at an axial deviation of 180°. In this way, the number of the first baffle outer ring 217, the second baffle outer ring 227, the first rectifying outer ring 218 and the second rectifying outer ring 228 can be randomly matched. For example, more than two first rectifying outer rings 218 can be designed at the rear end of one or more than two first baffle outer rings 217, or more than two second rectifying outer rings 228 can be designed at the rear end of one or more than two second baffle outer rings 227. Flexible configuration of the guide assembly 2 is achieved by uniformly designing the first rectifying outer ring 218 and the second rectifying outer ring 228 as rectifying outer ring standard parts 5, and uniformly designing the first baffle outer ring 217 and the second baffle outer ring 227 as baffle outer ring standard parts 4.

[0042] Furthermore, in order to more conveniently fix the position of the first baffle kit 21 and the second baffle kit 22, the present application provides a positioning protrusion 41 on each of the two circumferential surfaces of the baffle outer ring standard component 4, and the two positioning protrusions 41 are symmetrically distributed with the cross section of the baffle outer ring standard component 4; a positioning groove 51 is provided on each of the two circumferential surfaces of the rectifying outer ring standard component 5, and the position correspondence between one positioning groove 51 and another positioning groove 51 is as follows: one positioning groove 51 is symmetrical with the other positioning groove 51 with the cross section of the rectifying outer ring standard component 5, and is rotated 180° with the axial direction of the rectifying outer ring standard component 5 as the center, so that during installation, a baffle outer ring standard component 4 (the first baffle kit 21) is first installed on the annular gear position 121 of the sealing sleeve 12, and then Install a rectifying outer ring standard component 5 (first baffle kit 21) into the sealing sleeve 12. After adjusting the position, the positioning groove 51 of the rectifying outer ring standard component 5 and the positioning protrusion 41 of the deflector outer ring standard component 4 can be interlocked to achieve positioning. Then continue to put in the next deflector outer ring standard component 4 (second baffle kit 22), and the positioning protrusions 41 of the deflector outer ring standard component 4 are mutually interlocked in the positioning groove 51 of the rectifying outer ring standard component 5. Then continue to install a rectifying outer ring standard component 5 (second baffle kit 22) into the sealing sleeve 12 and position it to achieve installation. In the process of assembly, the first baffle kit 21 and the second baffle kit 22 can be automatically deflected 180°, which plays a role in positioning and preventing misalignment during assembly, thereby improving assembly efficiency.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A one-way valve for a ventilator, characterized in that: include: A housing component (1), the housing component (1) comprising a flow channel (3), the flow channel (3) being provided with an air inlet (31) and an air outlet (32); A flow guide assembly (2), the flow guide assembly (2) being arranged in the flow channel (3), the flow guide assembly (2) comprising a first flow blocking assembly (21) and a second flow blocking assembly (22) arranged at intervals along the axial direction of the flow channel (3), a first flow opening (212) being provided between the first flow blocking assembly (21) and the inner wall of the flow channel (3), the first flow blocking assembly (21) being inclined toward the exhaust port (32) with an end away from the first flow opening (212) as a reference, the second flow blocking assembly (22) having the same inclination as the first flow blocking assembly (21), the second flow blocking assembly (22) being opposite to the first flow opening (212), and the projection surface of the second flow blocking assembly (22) on the cross section of the flow channel (3) completely covering the projection surface of the first flow opening (212) on the cross section of the flow channel (3); The first flow baffle assembly (21) comprises a first baffle plate (211), the first flow opening (212) being formed between the first baffle plate (211) and the inner wall of the flow channel (3), the first baffle plate (211) having an arc, the outer arc surface of the first baffle plate (211) facing the air inlet (31), and the inner arc surface of the first baffle plate (211) facing the air outlet (32); The first flow baffle assembly (21) further comprises at least one first flow rectifying plate (213), the first flow rectifying plate (211) being close to the air inlet (31), the first flow rectifying plate (213) being close to the exhaust port (32), the first flow rectifying plate (213) being arranged in the middle of the flow channel (3), a second flow opening (214) and a third flow opening (215) being formed between two ends of the first flow rectifying plate (213) and the inner wall of the flow channel (3), the second flow opening (214) being opposite to the first flow opening (212), and the third flow opening (215) being opposite to the first flow rectifying plate (211); The second baffle assembly (22) comprises a second baffle plate (221), a fourth flow opening (222) is formed between the second baffle plate (221) and the inner wall of the flow channel (3), the second baffle plate (221) has an arc, an outer arc surface of the second baffle plate (221) faces the air inlet (31), and an inner arc surface of the second baffle plate (221) faces the air outlet (32); The second flow baffle kit (22) further comprises at least one second rectifying plate (223), wherein the second deflector plate (221) is close to the air inlet (31), and the second rectifying plate (223) is close to the exhaust port (32), and the second rectifying plate (223) is arranged in the middle of the flow channel (3), and a fifth flow opening (224) and a sixth flow opening (225) are formed between the two ends of the second rectifying plate (223) and the inner wall of the flow channel (3), wherein the fifth flow opening (224) is opposite to the fourth flow opening (222), and the sixth flow opening (225) is opposite to the second deflector plate (221).

2. The one-way valve for a ventilator according to claim 1, characterized in that: The projection areas of the first flow opening (212) and the fourth flow opening (222) on the cross section of the flow channel (3) are less than half of the cross section area of ​​the flow channel (3).

3. The one-way valve for a ventilator according to claim 1, characterized in that: The housing component (1) comprises a pipe sleeve (11) and a sealing sleeve (12); a positioning protrusion (41) is provided on the outside of the sealing sleeve (12); both ends of the sealing sleeve (12) are provided with annular stops (121); and the flow guide component (2) is arranged between the two annular stops (121) of the sealing sleeve (12).

4. The one-way valve for a ventilator according to claim 3, characterized in that: The first baffle assembly (21) comprises: a first outer ring (216), a first baffle plate (211) and a first rectifying plate (213); the first baffle plate (211) and the first rectifying plate (213) are arranged on the inner side of the first outer ring (216); the first baffle plate (211) and the first rectifying plate (213) are used for guiding flow; The second baffle assembly (22) comprises: a second outer ring (226), a second baffle plate (221) and a second rectifying plate (223), wherein the second baffle plate (221) and the second rectifying plate (223) are arranged on the inner side of the second outer ring (226), and the second baffle plate (221) and the second rectifying plate (223) are used for guiding flow; The end surfaces of the first outer ring (216) and the second outer ring (226) abut against each other and are installed in the sealing sleeve (12).

5. The one-way valve for a ventilator according to claim 4, characterized in that: The first outer ring comprises: a first baffle outer ring (217), wherein the first baffle plate (211) is arranged inside the first baffle outer ring; a first rectifying outer ring (218), wherein the first rectifying plate (213) is arranged inside the first rectifying outer ring (218); The second outer ring comprises: a second baffle outer ring (227), wherein the second baffle plate (221) is arranged inside the second baffle outer ring (227); a second rectifying outer ring (228), wherein the second rectifying plate (223) is arranged inside the second rectifying outer ring (228); The first baffle outer ring (217) and the second baffle outer ring (227) are both baffle outer ring standard parts (4), and the first baffle outer ring (217) and the second baffle outer ring (227) have an axis deviation of 180°; the first rectifying outer ring (218) and the second rectifying outer ring (228) are both rectifying outer ring standard parts (5), and the first rectifying outer ring (218) and the second rectifying outer ring (228) have an axis deviation of 180°.

6. The one-way valve for a breathing machine according to claim 5, characterized in that: Each of the two circumferential surfaces of the deflection outer ring standard component (4) is provided with a positioning protrusion (41), and the two positioning protrusions (41) are symmetrically distributed with respect to the cross section of the deflection outer ring standard component (4); each of the two circumferential surfaces of the rectification outer ring standard component (5) is provided with a positioning groove (51), and the position correspondence between one positioning groove (51) and another positioning groove (51) is as follows: symmetrical with respect to the cross section of the rectification outer ring standard component (5) and rotated 180° with respect to the axial direction of the rectification outer ring standard component (5).

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