Oxygen-saving oxygen generator testing device capable of simulating respiration

Abstract

The invention discloses an oxygen-saving oxygenerator testing device capable of simulating respiration. The oxygen-saving oxygenerator testing device comprises negative pressure source equipment, a throttling valve, a three-way electronic valve I, a timer, a three-way electronic valve II and an airflow analyzer, an air suction port of the negative pressure source equipment is communicated with a connector at one end of the throttling valve, the other connector of the throttling valve is communicated with a connector at one end of the three-way electronic valve I, and a connector at the other end of the three-way electronic valve I is used for being communicated with a pressure sensing connector of the oxygen-saving oxygen generator; an oxygen outlet of the oxygen-saving oxygen generator is communicated with a connector at one end of a three-way electronic valve II, and a connector at the other end of the three-way electronic valve II is communicated with an air inlet of an airflow analyzer; and the timer is respectively connected with the three-way electronic valve I and the three-way electronic valve II. The action of the three-way electronic valve I and the three-way electronic valve II is controlled through the timer, different breathing frequencies and effective breathing time can be accurately simulated, the testing environment is closer to the real breathing condition of a human body, and more reliable simulation conditions are provided for testing.

Description

Technical Field

[0001] The present invention relates to the technical field of testing instruments, and more particularly to a testing device for an oxygen-saving oxygen generator that simulates breathing. Background Art

[0002] An oxygen-saving oxygen concentrator uses molecular sieve technology to separate nitrogen and other impurities in the air, extract high-purity oxygen, and automatically deliver oxygen according to the user's breathing rate. The traditional test method for this device is to connect the oxygen concentrator, flow meter, and oxygen concentration analyzer in sequence through connecting pipes, measure and record the oxygen flow and concentration. This test method cannot evaluate the impact of changes in the patient's breathing rate on the performance of the oxygen concentrator system. According to the standard ISO 80601-2-67:2020, the effective inhalation time (delivered oxygen capture time) of the oxygen concentrator at different breathing rates is approximately 60% of the total inhalation time (Inspiratory time). Therefore, traditional test methods make it difficult to truly evaluate the system performance of the oxygen-saving oxygen concentrator when simulating normal use. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] In order to achieve these purposes and other advantages according to the present invention, there is provided a test device for an oxygen-saving oxygen concentrator for simulating breathing, comprising: a negative pressure source device, a throttle valve, a three-way electronic valve I, a timer, a three-way electronic valve II and an airflow analyzer; The air inlet of the negative pressure source device is connected to one end interface of the throttle valve, the other end interface of the throttle valve is connected to one end interface of the three-way electronic valve I, and the other end interface of the three-way electronic valve I is used to communicate with the pressure sensing interface of the oxygen-saving oxygen generator; The oxygen outlet of the oxygen-saving oxygen generator is connected to one end interface of the three-way electronic valve II, the other end interface of the three-way electronic valve II is connected to the air inlet of the gas flow analyzer, and the third end interface of the three-way electronic valve II is connected to the atmosphere; The timer is connected to the three-way electronic valve I to control the number of times the three-way electronic valve I is connected to the negative pressure source device and the oxygen-saving oxygen generator per minute to simulate different breathing frequencies. The timer is also connected to the three-way electronic valve II to control the duration of each connection between the three-way electronic valve II and the oxygen-saving oxygen generator to simulate the effective breathing time.

[0005] Preferably, when the duration of each connection between the three-way electronic valve II and the oxygen-saving oxygen generator and the airflow analyzer reaches the effective breathing time, the three-way electronic valve II connects the oxygen-saving oxygen generator and the third end interface of the three-way electronic valve II to allow the oxygen output by the oxygen-saving oxygen generator to be discharged into the air.

[0006] Preferably, the oxygen outlet of the oxygen-saving oxygen concentrator is connected to an interface at one end of the three-way electronic valve II through a trachea simulation device, and the trachea simulation device comprises: A simulation box, wherein a first vertical partition plate and a second vertical partition plate are arranged inside the simulation box to divide the interior of the simulation box into a front space, a middle space and a back space, and a third horizontal partition plate is arranged between the first partition plate and the second partition plate to divide the middle space into a middle upper space and a middle lower space; Two pipe assemblies, which are respectively arranged in the middle upper space and the middle lower space, the pipe assembly is in a binary tree structure, the root pipe of the pipe assembly is connected to the first partition plate, the first partition plate is provided with a first through hole connected to the root pipe of the pipe assembly, the terminal pipes of the pipe assembly are respectively connected to the second partition plate, the second partition plate is provided with a plurality of second through holes correspondingly connected to the terminal pipes of the pipe assembly, the pipe assembly located in the middle upper space is made of plastic, and the pipe assembly located in the middle lower space is made of rubber; A switching assembly, which is disposed on the plate surface of the first partition plate located in the front space, and is used to selectively open one of the two first through holes and close the other; Wherein, an air inlet is provided on the side plate of the simulation box opposite to the first partition plate, and an air outlet is provided on the side plate of the simulation box opposite to the second partition plate.

[0007] Preferably, the switching component comprises: A rotating shaft connected to the plate surface of the first partition plate located in the front space and located between the two first through holes; a circular baffle, which is coaxially rotatably connected to the rotating shaft, and the circular baffle is closely attached to the first partition plate, the circular baffle covers the two first through holes, and a third through hole is further provided on the circular baffle, the diameter of the third through hole is the same as the diameter of the first through hole, and the distance from the third through hole to the axis of the circular baffle is the same as the distance from the first through hole to the axis of the circular baffle, so that during the rotation of the circular baffle, the third through hole can be opposite to one of the two first through holes, and the circumferential surface of the circular baffle is provided with teeth; a gear disposed in the front space and meshing with the circular baffle; The servo motor is arranged in the front space, the gear is coaxially installed on the output shaft of the servo motor, and the controller of the servo motor is arranged outside the simulation box.

[0008] Preferably, the inner diameter of the pipes in the pipe assembly gradually decreases from the root pipe to the distal pipe, the inner diameter of the root pipe is 15-25 mm, and the inner diameter of the distal pipe is 1-5 mm.

[0009] Preferably, the simulation box is made of a transparent acrylic plate.

[0010] Preferably, an annular sealing groove is provided on the edge of the plate surface of the circular baffle plate facing the first partition plate, and a sealing ring is provided in the annular sealing groove.

[0011] The present invention includes at least the following beneficial effects: by controlling the actions of the three-way electronic valves I and II through the timer, different breathing frequencies and effective breathing times can be accurately simulated, so that the test environment is closer to the actual breathing conditions of the human body, thereby providing more reliable simulation conditions for the performance test of the oxygen-saving oxygen concentrator. The airflow analyzer can detect the key parameters such as the flow rate and concentration of the oxygen output by the oxygen-saving oxygen concentrator in real time, helping the tester to fully understand the oxygen production performance of the oxygen-saving oxygen concentrator under different breathing conditions, including whether the oxygen production is stable and whether the concentration meets the standard, etc., which is conducive to evaluating the overall quality and applicability of the oxygen-saving oxygen concentrator. The throttle valve can adjust the negative pressure entering the oxygen-saving oxygen concentrator, and can simulate the pressure changes under different breathing intensities; at the same time, the timer can flexibly set the breathing frequency and effective breathing time, and can diversify the test conditions according to different test requirements and research purposes to meet the performance test of the oxygen-saving oxygen concentrator in different scenarios. The structure of the entire test device is relatively simple, composed of common equipment components, low cost and easy to maintain. The connections between the components are clear and the operation is convenient, which is conducive to the promotion and use in different testing sites (such as laboratories, production workshops, etc.) and improves the testing efficiency and quality of the oxygen-saving oxygen concentrator.

[0012] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the pipeline connection of the oxygen-saving oxygen generator test device for simulating breathing according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the external structure of the trachea simulation device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal top view of the trachea simulation device according to an embodiment of the present invention; Figure 4 It is a front view schematic diagram of the first partition plate, circular baffle plate, gear and servo motor in an embodiment of the present invention; In the figure: 1-negative pressure source equipment, 2-throttle valve, 3-three-way electronic valve I, 4-timer, 5-three-way electronic valve II, 6-air flow analyzer, 7-simulation box, 8-first partition plate, 9-second partition plate, 10-pipeline assembly, 11-rotating shaft, 12-circular baffle, 13-gear, 14-servo motor. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0015] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0016] like Figure 1 As shown, the present invention provides a test device for an oxygen-saving oxygen generator for simulating breathing, comprising: a negative pressure source device 1, a throttle valve 2, a three-way electronic valve I 3, a timer 4, a three-way electronic valve II 5 and an airflow analyzer 6; The air inlet of the negative pressure source device 1 is connected to one end interface of the throttle valve 2, and the other end interface of the throttle valve 2 is connected to one end interface of the three-way electronic valve I3, and the other end interface of the three-way electronic valve I3 is used to communicate with the pressure sensing interface of the oxygen-saving oxygen generator; The oxygen outlet of the oxygen-saving oxygen generator is connected to one end interface of the three-way electronic valve II5, the other end interface of the three-way electronic valve II5 is connected to the air inlet of the gas flow analyzer 6, and the third end interface of the three-way electronic valve II5 is connected to the atmosphere; The timer 4 is connected to the three-way electronic valve I3, and is used to control the number of times per minute that the three-way electronic valve I3 connects to the negative pressure source device 1 and the oxygen-saving oxygen generator to simulate different breathing frequencies. The timer 4 is also connected to the three-way electronic valve II5, and is used to control the duration of each connection between the three-way electronic valve II5 and the oxygen-saving oxygen generator and the airflow analyzer 6 to simulate the effective breathing time.

[0017] Specifically, the negative pressure source device 1 can use a rotary vane vacuum pump, which is suitable for scenarios where the negative pressure requirements are not particularly high but the cost control is relatively strict. It has a simple structure and a relatively low price, and can meet the basic requirements for negative pressure in general oxygen-saving oxygen generator tests. For example, in some small laboratories or tests in the initial research and development stage, its pumping rate and ultimate vacuum degree can meet the negative pressure requirements under simulated normal breathing frequencies.

[0018] The throttle valve 2 can be a stop-type throttle valve 2, which has a simple structure, good sealing and easy operation. For some test scenarios that do not require particularly stringent adjustment accuracy but focus on cost and maintenance convenience, the stop-type throttle valve 2 is a good choice. In the performance test of ordinary oxygen-saving oxygen generators, it can meet basic adjustment requirements.

[0019] The three-way electronic valve can be a pilot-operated three-way solenoid valve, which has a fast response speed and is suitable for tests that require rapid switching of gas passages. When simulating a high respiratory rate, the pilot-operated three-way solenoid valve can quickly transmit negative pressure to the oxygen conserving oxygen generator or switch the oxygen flow to the gas flow analyzer 6 to ensure the accuracy of the test. It also has high working stability and can maintain good performance in frequent switching actions.

[0020] The timer 4 can be a programmable timer 4, which has high precision and flexible programming functions and can set complex timing modes. For tests that need to simulate a variety of different breathing frequencies and effective breathing time combinations, the programmable timer 4 can accurately control the action of the three-way electronic valve according to a preset program to meet diverse testing needs.

[0021] The gas flow analyzer 6 can be a multi-parameter gas mass flow analyzer, which can simultaneously detect multiple parameters such as oxygen flow, concentration, temperature, etc., and is suitable for testing the comprehensive evaluation of the performance of the oxygen-saving oxygen generator. It has high detection accuracy and can provide detailed oxygen parameter data to help testers gain a deep understanding of the working status of the oxygen-saving oxygen generator.

[0022] Before using the above-mentioned simulated breathing oxygen-saving oxygen concentrator test device, check whether the connection of each device is correct, and ensure that the pipelines between the negative pressure source device 1, the throttle valve 2, the three-way electronic valve I3, the timer 4, the three-way electronic valve II5 and the airflow analyzer 6 are tightly connected without leakage. According to the test requirements, set the parameters of the timer 4 to determine the simulated breathing frequency (i.e., set the number of times the three-way electronic valve I3 connects the negative pressure source device 1 and the oxygen-saving oxygen concentrator per minute) and the effective breathing time (set the duration of each connection of the three-way electronic valve II5 to the oxygen-saving oxygen concentrator and the airflow analyzer 6).

[0023] Here, the respiratory rate and effective respiratory time can refer to the requirements in the standard ISO 80601-2-67:2020, as shown in Table 1 below: Table 1 Oxygen delivery test parameters <![CDATA[Respiratory rate (min -1 ).]]> Inspiratory time (s) Delivery oxygen capture time (s) 15 1.33 0.80 20 1.00 0.60 25 0.80 0.48 30 0.67 0.40 35 0.57 0.34 40 0.50 0.30 Note: Effective breathing time is the time for oxygen delivery and capture Turn on the negative pressure source device 1 to generate negative pressure. The negative pressure airflow passes through the throttle valve 2. By adjusting the opening of the throttle valve 2, the gas flow and pressure entering the three-way electronic valve Ⅰ3 can be controlled. When the three-way electronic valve Ⅰ3 is opened at the frequency set by the timer 4, the negative pressure is transmitted to the pressure sensing interface of the oxygen conserving oxygen generator, simulating the negative pressure process of inhalation during human breathing.

[0024] The oxygen-saving oxygen generator starts working after sensing negative pressure, generating oxygen and outputting it through its oxygen outlet. At this time, the three-way electronic valve II5 opens according to the effective breathing time set by the timer 4, allowing the oxygen output by the oxygen-saving oxygen generator to flow into the airflow analyzer 6, which detects and analyzes the flow rate, concentration and other parameters of the oxygen. When the three-way electronic valve II5 is closed, part of the oxygen is discharged through its third end interface connected to the atmosphere, simulating the situation where excess gas is discharged from the body during human exhalation.

[0025] During the entire test process, the airflow analyzer 6 collects oxygen-related data in real time and transmits the data to relevant data processing equipment (such as a computer) for recording and analysis. According to different test stages and set parameters, the above steps are repeated multiple times to obtain the performance data of the oxygen-saving oxygen concentrator under different simulated breathing conditions.

[0026] In the above-mentioned oxygen-saving oxygen concentrator test device for simulating breathing, the actions of the three-way electronic valves Ⅰ3 and Ⅱ are controlled by the timer 4, which can accurately simulate different breathing frequencies and effective breathing times, making the test environment closer to the actual breathing conditions of the human body, thereby providing more reliable simulation conditions for the performance test of the oxygen-saving oxygen concentrator. The airflow analyzer 6 can detect the key parameters such as the flow rate and concentration of the oxygen output by the oxygen-saving oxygen concentrator in real time, helping the tester to fully understand the oxygen production performance of the oxygen-saving oxygen concentrator under different breathing conditions, including whether the oxygen production is stable and whether the concentration meets the standard, etc., which is conducive to evaluating the overall quality and applicability of the oxygen-saving oxygen concentrator. The throttle valve 2 can adjust the negative pressure entering the oxygen-saving oxygen concentrator, and can simulate the pressure changes under different breathing intensities; at the same time, the timer 4 can flexibly set the breathing frequency and effective breathing time, and can diversify the test conditions according to different test requirements and research purposes to meet the performance test of the oxygen-saving oxygen concentrator in different scenarios. The structure of the entire test device is relatively simple, composed of common equipment components, low cost and easy to maintain. The connections between the components are clear and the operation is convenient, which is conducive to the promotion and use in different testing sites (such as laboratories, production workshops, etc.) and improves the testing efficiency and quality of the oxygen-saving oxygen concentrator.

[0027] In another embodiment, when the duration of each connection between the three-way electronic valve II5 and the oxygen-saving oxygen generator and the airflow analyzer 6 reaches the effective breathing time, the three-way electronic valve II5 connects the oxygen-saving oxygen generator and the third end interface of the three-way electronic valve II5 to allow the oxygen output by the oxygen-saving oxygen generator to be discharged into the air.

[0028] If the oxygen conserving oxygen generator continues to output oxygen to the gas flow analyzer 6, the gas pressure in the analyzer may be too high, affecting the detection accuracy or even damaging the equipment. This solution discharges oxygen in time after the effective breathing time, avoiding gas accumulation in the gas flow analyzer 6, ensuring the safety of the equipment, and ensuring that the analyzer can accurately detect oxygen flow, concentration and other parameters under normal working pressure every time, thereby improving the accuracy of the test data.

[0029] The oxygen-saving oxygen generator test device in the above embodiment mainly simulates the respiratory frequency and effective breathing time by controlling the three-way electronic valve through the timer 4, but the breathing process is not just a simple combination of frequency and time. In actual human breathing, the pressure change curves of inhalation and exhalation are complex and are also affected by various factors such as respiratory resistance. However, this device does not take these factors into consideration, but simply simulates the frequency and time of breathing, which cannot fully and truly reflect the performance of the oxygen-saving oxygen generator in the human use environment. Therefore, a trachea simulation device is added in the following embodiment, and pipes with different resistance characteristics are used to simulate the human respiratory tract, which more realistically simulates various situations in the human breathing process, thereby more comprehensively testing the performance of the oxygen-saving oxygen generator.

[0030] In another embodiment, the oxygen outlet of the oxygen-saving oxygen generator is connected to an interface at one end of the three-way electronic valve II5 through a trachea simulation device, and the trachea simulation device includes: A simulation box 7 is provided with a first vertical partition plate 8 and a second vertical partition plate 9 inside the simulation box 7 to divide the interior of the simulation box 7 into a front space, a middle space and a back space, and a third horizontal partition plate is provided between the first partition plate 8 and the second partition plate 9 to divide the middle space into a middle upper space and a middle lower space; Two pipe assemblies 10 are respectively arranged in the middle upper space and the middle lower space, the pipe assembly 10 is in a binary tree structure, the root pipe of the pipe assembly 10 is connected to the first partition plate 8, the first partition plate 8 is provided with a first through hole connected to the root pipe of the pipe assembly 10, the terminal pipes of the pipe assembly 10 are respectively connected to the second partition plate 9, the second partition plate 9 is provided with a plurality of second through holes corresponding to the terminal pipes of the pipe assembly 10, the pipe assembly 10 located in the middle upper space is made of plastic, and the pipe assembly 10 located in the middle lower space is made of rubber; A switching assembly, which is arranged on the plate surface of the first partition plate 8 located in the front space, and is used to selectively open one of the two first through holes and close the other; An air inlet is provided on the side plate of the simulation box 7 opposite to the first partition plate 8 , and an air outlet is provided on the side plate of the simulation box 7 opposite to the second partition plate 9 .

[0031] Before testing the oxygen-saving oxygen generator, according to the simulation requirements, the switching component is used to select and open the first through hole corresponding to the middle upper space or the middle lower space pipe component 10. If it is necessary to simulate a relatively unobstructed respiratory tract with less resistance, the first through hole connected to the plastic pipe component 10 can be opened; if it is necessary to simulate a certain obstruction in the respiratory tract with greater resistance, the first through hole connected to the rubber pipe component 10 is opened, and the other first through hole is closed at the same time.

[0032] The oxygen-saving oxygen generator starts working, and the generated oxygen flows out from the oxygen outlet and enters the front space through the air inlet of the simulation box 7. Due to the effect of the switching component, oxygen can only enter the corresponding pipeline component 10 through the first open through hole. In the pipeline component 10, oxygen is diverted according to a binary tree structure, simulating the branching structure of the human trachea, so that the oxygen produces different pressure and flow rate changes during the flow process. The oxygen passes through the terminal pipeline, enters the rear space through the second through hole, and then flows out from the air outlet, flows into the three-way electronic valve II5, and then enters the air flow analyzer 6 for detection and analysis.

[0033] During the test, if the simulated airway resistance needs to be changed, the pipeline component 10 can be switched by switching the component without stopping the test, thereby realizing the conversion of different simulation conditions conveniently and quickly to obtain more diverse test data.

[0034] In the above embodiment, the pipe assembly 10 with a binary tree structure can well simulate the branching of the human trachea, so that the flow of oxygen therein is closer to the gas flow state in the human trachea, including the gas diversion, flow rate change, etc., which provides the possibility for the oxygen-saving oxygen generator to be tested in a more realistic tracheal environment, and helps to improve the accuracy of the test results. By setting the pipe assembly 10 of different materials (plastic and rubber), taking advantage of the characteristics that the inner wall of the plastic pipe is smooth and has low resistance, and the inner wall of the rubber pipe is relatively rough and has high resistance, it can flexibly simulate the resistance of the human respiratory tract under different health conditions, such as normal respiratory tract and respiratory tract with mild obstruction, and comprehensively evaluate the performance of the oxygen-saving oxygen generator under different resistance conditions. The switching assembly can conveniently switch different pipe assemblies 10 during the test process, realize the rapid adjustment of different simulation conditions, without complicated disassembly and installation operations, greatly improve the test efficiency, and at the same time, more test data under different conditions can be obtained, providing a richer basis for the performance evaluation of the oxygen-saving oxygen generator. The partition structure of the simulation box 7 is reasonably designed, integrating spaces with different functions, making the entire tracheal simulation device compact and easy to install and maintain. Moreover, the device is simply connected to the entire test system and can be easily integrated into an existing oxygen-saving oxygen generator test device, thereby improving the overall performance of the test device.

[0035] In another embodiment, the switching component comprises: A rotating shaft 11, which is connected to the plate surface of the first partition plate 8 located in the front space and is located between the two first through holes; a circular baffle 12, which is coaxially rotatably connected to the rotating shaft 11, and the circular baffle 12 is closely attached to the first partition plate 8, the circular baffle 12 covers the two first through holes, and a third through hole is further provided on the circular baffle 12, the diameter of the third through hole is the same as the diameter of the first through hole, and the distance from the third through hole to the axis of the circular baffle 12 is the same as the distance from the first through hole to the axis of the circular baffle 12, so that during the rotation of the circular baffle 12, the third through hole can be opposite to one of the two first through holes, and the circumferential surface of the circular baffle 12 is provided with teeth; a gear 13, which is disposed in the front space and meshes with the circular baffle 12; The servo motor 14 is arranged in the front space, the gear 13 is coaxially mounted on the output shaft of the servo motor 14 , and the controller of the servo motor 14 is arranged outside the simulation box 7 .

[0036] Before testing the oxygen-saving oxygen generator, the operator sets the rotation direction and angle of the motor through the controller of the servo motor 14 outside the simulation box 7 according to the needs of simulating different respiratory resistances. For example, if oxygen is to pass through the plastic pipe assembly 10, the servo motor 14 needs to be controlled to drive the gear 13 to rotate. Since the gear 13 is engaged with the circular baffle 12, the circular baffle 12 is driven to rotate around the rotating shaft 11. Start the servo motor 14, the motor output shaft drives the gear 13 to rotate, and the gear 13 drives the circular baffle 12 to rotate. During the rotation process, the third through hole on the circular baffle 12 gradually approaches and corresponds to the first through hole of the plastic pipe assembly 10. When the two are fully aligned, stop the servo motor 14. At this time, the oxygen output by the oxygen-saving oxygen generator can enter the plastic pipe assembly 10 through the air inlet, the first through hole, and the third through hole, completing the setting of simulating the unobstructed state of the respiratory tract. During the test, if it is necessary to change the simulated airway resistance, such as switching from simulating an unobstructed airway to simulating an obstructed airway, the operator again sends a command to the servo motor 14 through the controller, and the motor reverses or rotates forward by a certain angle, driving the circular baffle 12 to continue rotating, so that the third through hole is opposite to the first through hole of the corresponding rubber pipe assembly 10, thereby switching the pipe assembly 10 and redirecting the oxygen into the rubber pipe assembly 10.

[0037] In the above embodiment, the user uses the servo motor 14 to drive the circular baffle 12 to rotate, and the rotation angle and direction of the motor can be accurately set through the controller, so as to accurately control the position of the circular baffle 12 and ensure that the third through hole is accurately aligned with the target first through hole. Compared with manual operation, automatic control avoids human errors, improves the accuracy and reliability of switching, and provides more stable and accurate simulation conditions for the performance test of the oxygen-saving oxygen generator. The simulation box 7 has good sealing performance and there is no risk of detection error caused by oxygen leakage. The controller of the servo motor 14 is set outside the simulation box 7, and the operator does not need to directly contact the complex mechanical structure inside the simulation box 7, and can remotely control the switching component at a safe distance. This not only facilitates operation, but also avoids interference caused by the operator approaching the simulation box 7, which is particularly suitable for some scenarios with high requirements for the stability of the test environment, and improves the convenience and safety of the test. The servo motor 14 has a fast response speed and can complete the rotation switching of the circular baffle 12 in a short time. When it is necessary to frequently simulate different airway resistance conditions, the fast switching speed can greatly improve the test efficiency, enable testers to obtain a variety of test data in a shorter time, and speed up the process of performance evaluation of the oxygen-saving oxygen generator.

[0038] In another embodiment, the inner diameter of the pipe in the pipe assembly 10 gradually decreases from the root pipe to the distal pipe, the inner diameter of the root pipe is 15-25 mm, and the inner diameter of the distal pipe is 1-5 mm.

[0039] The inner diameter of the human trachea gradually decreases from the main trachea to the various levels of bronchi and then to the bronchioles. The inner diameter of the pipeline assembly 10 gradually decreases from the root pipeline to the terminal pipeline, and the inner diameter of the root pipeline is 15~25mm, which is close to the diameter of the human trachea, and the inner diameter of the terminal pipeline is 1~5mm, which is close to the diameter of the bronchioles. It can highly restore the structural characteristics of the human trachea, so that the flow state of oxygen output by the oxygen-saving oxygen generator in the pipeline assembly 10 is more similar to that in the human trachea, which helps to improve the authenticity and reliability of the test and lay the foundation for accurately evaluating the performance of the oxygen-saving oxygen generator. Under different breathing conditions, the flow rate and pressure distribution of the gas in the trachea are different. A smaller inner diameter of the terminal pipeline will increase the gas flow rate and increase the resistance, simulating the rapid flow of gas and increased resistance in the bronchioles when the human body takes a deep breath or breathes rapidly; while a larger inner diameter of the root pipeline can simulate the relatively stable flow state of gas in the main trachea. Through this change in pipe diameter, various breathing states can be simulated more comprehensively, so as to more deeply test the performance of the oxygen-saving oxygen concentrator under different breathing conditions, such as detecting whether it can stably provide oxygen with appropriate flow and pressure under different breathing conditions. The combination of pipes with different inner diameters can produce a variety of gas flow characteristics. During the test, the gas flow analyzer 6 can collect rich data such as oxygen flow and pressure. These diverse data can provide more comprehensive information for the performance evaluation of the oxygen-saving oxygen concentrator, and help R&D personnel or testers to find possible problems with the oxygen-saving oxygen concentrator under different gas flow conditions, such as whether there is insufficient oxygen supply or abnormal pressure in high-flow and low-inner-diameter pipes, thereby promoting product optimization and improvement.

[0040] In another embodiment, the simulation box 7 is made of a transparent acrylic plate.

[0041] The use of transparent acrylic plate enables the operator to directly observe the gas flow inside the simulation box 7 and the working status of the switching component. During the test, the flow path of oxygen in different pipeline components 10 and the alignment of the circular baffle 12 with the first through hole and the third through hole can be viewed in real time. This helps the operator to promptly discover possible problems, such as inadequate switching, so as to adjust and maintain the equipment in time to ensure the accuracy and reliability of the test. Since the internal structure can be clearly seen, the maintenance personnel can quickly locate the fault point during equipment maintenance. For example, if the switching component is found to be stuck, the meshing between the gear 13 and the circular baffle 12 can be directly observed to determine whether there is a foreign object stuck or the parts are worn, thereby improving maintenance efficiency, reducing equipment downtime, and reducing maintenance costs. Acrylic plate has good chemical stability and weather resistance, and can maintain stable performance under different test environments. It is not easily corroded by gases such as oxygen, can adapt to certain temperature and humidity changes, is not easy to deform or age, ensures the long-term service life of the simulation box 7, reduces the frequency of equipment replacement due to material problems, and provides reliable hardware support for the long-term testing of oxygen-saving oxygen generators. The transparent acrylic plate has a beautiful appearance, making the entire test device more technological. At the same time, the acrylic plate is relatively light, and compared with some metal simulation boxes 7, it is easier to install and move, which is convenient for testers to adjust the position of the test device according to actual needs, thereby improving the flexibility and applicability of the test device.

[0042] In another embodiment, an annular sealing groove is provided on the plate edge of the circular baffle plate 12 facing the first partition plate 8, and a sealing ring is provided in the annular sealing groove.

[0043] An annular sealing groove is set on the edge of the plate surface of the circular baffle 12 facing the first partition plate 8, and a sealing ring is installed, which can effectively fill the gap between the circular baffle 12 and the first partition plate 8. When the circular baffle 12 rotates to switch different pipeline components 10, the sealing ring fits tightly against the first partition plate 8 to prevent gas from leaking from the gap between the two. This ensures that the oxygen output by the oxygen-saving oxygen generator can only enter the corresponding pipeline component 10 through the designated first through hole and the third through hole, ensures the accuracy of the simulated gas flow path, avoids the simulated environment from being inconsistent with the actual situation due to gas leakage, and thus improves the reliability of the test. Good sealing performance makes the oxygen flow rate, concentration and other data collected by the gas flow analyzer 6 more accurate during the test. Because gas leakage will cause deviations in the measurement data, it will affect the evaluation of the performance of the oxygen-saving oxygen generator. Through the sealing effect of the sealing ring, a stable and pure gas environment can be provided for the test, so that the test results can more truly reflect the working state of the oxygen-saving oxygen generator under simulated respiratory conditions, and provide a reliable basis for product performance optimization and quality inspection. The sealing ring can reduce the erosion and wear of the gas on the contact part between the circular baffle 12 and the first partition plate 8. During the long-term testing process, the continuous gas flow may cause corrosion or wear to the metal parts, and the presence of the sealing ring plays an isolation and protection role. This can not only extend the service life of the circular baffle 12 and the first partition plate 8 and reduce the maintenance and replacement costs of the equipment, but also ensure the long-term stable operation of the switching assembly and ensure the reliability and stability of the entire testing device. Since the sealing ring effectively prevents gas leakage and component wear, the number of equipment failures caused by sealing problems and component damage is reduced. This means that the frequency of equipment maintenance is reduced and the maintenance cost is also reduced accordingly. At the same time, when the sealing ring needs to be replaced, the operation is relatively simple and the cost is low, which further reduces the overall maintenance cost and improves the cost performance of the testing device.

[0044] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A test device for an oxygen-saving oxygen generator simulating breathing, characterized in that: include: Negative pressure source equipment, throttle valve, three-way electronic valve I, timer, three-way electronic valve II and airflow analyzer; The air inlet of the negative pressure source device is connected to one end interface of the throttle valve, the other end interface of the throttle valve is connected to one end interface of the three-way electronic valve I, and the other end interface of the three-way electronic valve I is used to communicate with the pressure sensing interface of the oxygen-saving oxygen generator; The oxygen outlet of the oxygen-saving oxygen generator is connected to one end interface of the three-way electronic valve II, the other end interface of the three-way electronic valve II is connected to the air inlet of the gas flow analyzer, and the third end interface of the three-way electronic valve II is connected to the atmosphere; The timer is connected to the three-way electronic valve I to control the number of times the three-way electronic valve I is connected to the negative pressure source device and the oxygen-saving oxygen generator per minute to simulate different breathing frequencies. The timer is also connected to the three-way electronic valve II to control the duration of each connection between the three-way electronic valve II and the oxygen-saving oxygen generator to simulate the effective breathing time.

2. The oxygen-saving oxygen concentrator test device for simulating breathing as claimed in claim 1, characterized in that: When the duration of each connection between the three-way electronic valve II and the oxygen-saving oxygen generator and the airflow analyzer reaches the effective breathing time, the three-way electronic valve II connects the oxygen-saving oxygen generator and the third end interface of the three-way electronic valve II to discharge the oxygen output by the oxygen-saving oxygen generator into the air.

3. The oxygen-saving oxygen concentrator test device for simulating breathing as claimed in claim 1, characterized in that: The oxygen outlet of the oxygen-saving oxygen generator is connected to an interface at one end of the three-way electronic valve II through a trachea simulation device, and the trachea simulation device includes: A simulation box, wherein a first vertical partition plate and a second vertical partition plate are arranged inside the simulation box to divide the interior of the simulation box into a front space, a middle space and a back space, and a third horizontal partition plate is arranged between the first partition plate and the second partition plate to divide the middle space into a middle upper space and a middle lower space; Two pipe assemblies, which are respectively arranged in the middle upper space and the middle lower space, the pipe assembly is in a binary tree structure, the root pipe of the pipe assembly is connected to the first partition plate, the first partition plate is provided with a first through hole connected to the root pipe of the pipe assembly, the terminal pipes of the pipe assembly are respectively connected to the second partition plate, the second partition plate is provided with a plurality of second through holes correspondingly connected to the terminal pipes of the pipe assembly, the pipe assembly located in the middle upper space is made of plastic, and the pipe assembly located in the middle lower space is made of rubber; A switching assembly, which is disposed on the plate surface of the first partition plate located in the front space, and is used to selectively open one of the two first through holes and close the other; Wherein, an air inlet is provided on the side plate of the simulation box opposite to the first partition plate, and an air outlet is provided on the side plate of the simulation box opposite to the second partition plate.

4. The oxygen-saving oxygen concentrator test device for simulating breathing as claimed in claim 3, characterized in that: The switching component comprises: A rotating shaft connected to the plate surface of the first partition plate located in the front space and located between the two first through holes; a circular baffle, which is coaxially rotatably connected to the rotating shaft, and the circular baffle is closely attached to the first partition plate, the circular baffle covers the two first through holes, and a third through hole is further provided on the circular baffle, the diameter of the third through hole is the same as the diameter of the first through hole, and the distance from the third through hole to the axis of the circular baffle is the same as the distance from the first through hole to the axis of the circular baffle, so that during the rotation of the circular baffle, the third through hole can be opposite to one of the two first through holes, and the circumferential surface of the circular baffle is provided with teeth; a gear disposed in the front space and meshing with the circular baffle; The servo motor is arranged in the front space, the gear is coaxially installed on the output shaft of the servo motor, and the controller of the servo motor is arranged outside the simulation box.

5. The oxygen-saving oxygen concentrator test device for simulating breathing as claimed in claim 3, characterized in that: The inner diameter of the pipe in the pipe assembly gradually decreases from the root pipe to the distal pipe, the inner diameter of the root pipe is 15-25 mm, and the inner diameter of the distal pipe is 1-5 mm.

6. The oxygen-saving oxygen concentrator test device for simulating breathing as claimed in claim 4, characterized in that: The simulation box is made of transparent acrylic plate.

7. The oxygen-saving oxygen concentrator test device for simulating breathing as claimed in claim 4, characterized in that: An annular sealing groove is arranged on the edge of the plate surface of the circular baffle plate facing the first partition plate, and a sealing ring is arranged in the annular sealing groove.

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