Triggering type oxygen generator with ACW air capturing function

Abstract

The invention discloses a trigger type oxygen generator with an ACW air capturing function, relates to the field of oxygen generators, and aims to solve the technical problems that a humidification bottle of an existing trigger type oxygen generator blocks a negative pressure signal, and internal heat dissipation negative pressure disturbs pressure compensation. The oxygen generator comprises an oxygen generator outer shell, a trigger plate, a humidification bottle and an internal structure assembly, a three-way pipe is arranged in the humidification bottle, an independent negative pressure signal acquisition channel is formed, and a water body barrier is bypassed; an ACW interface is formed in the side face of the outer shell and connected with a micro-pressure sensor with the detection precision being + / -0.001 MPa through an ACW connecting pipe, and a real-time external environment pressure reference is provided. Internal structural components form an air inlet channel, an air outlet channel and an exclusive heat dissipation and noise reduction channel, and stable and low-noise operation of equipment is guaranteed. According to the invention, both the humidifying function and accurate triggering are realized, the internal negative pressure interference is effectively counteracted, the signal attenuation and mistaken triggering are avoided, the synchronism of oxygen supply and breathing is improved, the energy is saved, the efficiency is high, the comfort is high, and the device is suitable for the scenes of clinical treatment, family oxygen therapy and the like.

Description

Technical Field

[0001] This invention relates to the field of oxygen concentrators, and more particularly to a trigger-type oxygen concentrator with ACW air capture function. Background Technology

[0002] As a core medical device in clinical treatment and home oxygen therapy, the accuracy of oxygen supply and the comfort of use of oxygen concentrators directly affect the effectiveness of oxygen therapy. With the development of oxygen therapy technology, trigger-type oxygen concentrators, which can supply oxygen on demand according to the patient's inhalation, are more energy-efficient and better match the human respiratory rhythm compared to traditional continuous flow oxygen concentrators. They can reduce oxygen waste and the "human-machine asynchrony" phenomenon, and have become one of the mainstream development directions in the market.

[0003] To improve patient comfort during oxygen therapy and avoid dry oxygen irritating the respiratory mucosa, existing trigger-type oxygen concentrators are generally equipped with humidification bottles, which humidify oxygen by contacting water before delivery to the patient. However, the application of humidification bottles has raised key technical challenges: Traditional trigger-type oxygen concentrators share the same channel for negative pressure signal transmission and oxygen humidification. When water is added to the humidification bottle, it creates a physical barrier. The negative pressure signal generated by the patient's inhalation must penetrate the water surface to reach the sensor inside the machine. However, in normal oxygen inhalation scenarios, water from the humidification bottle is not drawn into the tubing, resulting in the complete blockage of the negative pressure signal. The sensor cannot receive a valid trigger signal, and the device cannot provide accurate oxygen delivery. In simpler terms, the machine relies on the "suction signal generated during inhalation" (professionally referred to as the negative pressure signal) to determine when oxygen is being delivered. This signal must travel from the nose through the tube back to the small sensor inside the machine. But when water is added to the humidification bottle, the water acts like a wall, blocking this weak suction signal. The signal cannot pass through the water, the sensor cannot receive the signal, and naturally, it cannot accurately deliver oxygen in sync with breathing.

[0004] A more significant problem is that existing trigger-type oxygen concentrators have a core structural flaw: to ensure stable compressor operation, they are equipped with a turbine fan for cooling. When this fan operates, it draws air out of the casing and exhausts it through the vent, creating a continuous low-pressure environment inside the casing. The pressure compensation port for the sensor in traditional oxygen concentrators is typically located inside the casing, and its pressure compensation value is directly affected by this internal low-pressure environment, deviating from the actual external environmental pressure and causing inaccurate compensation. This, combined with the negative pressure signal attenuation from the approximately 2-meter nasal cannula between the patient and the concentrator, ultimately results in either insufficient sensor sensitivity, failing to respond promptly to the patient's inhalation, or false triggering, severely impacting the accuracy of oxygen delivery.

[0005] Existing technologies have not yet offered an effective solution to the internal pressure imbalance problem caused by heat dissipation. The ACW (Air Capture Window) structure designed in this patent is an innovative design specifically designed to solve this core problem: its core function is to provide a real-time, accurate external environmental pressure reference for the sensor's pressure compensation port through direct communication with the outside air, achieving pressure stabilization and calibration. Existing oxygen concentrators, lacking this type of structure, cannot eliminate the interference of internal heat dissipation negative pressure on compensation accuracy, resulting in unstable triggering performance.

[0006] Furthermore, the negative pressure signal blockage caused by the humidification bottle and the internal pressure imbalance caused by the turbine fan are two major problems that combine to make existing trigger-type oxygen concentrators unable to meet the core requirements of "humidification" and "precise triggering", and it is also difficult to eliminate the dual interference through simple structural optimization.

[0007] In summary, existing trigger-type oxygen concentrators have significant shortcomings in trigger accuracy and functional compatibility, limiting their widespread application in various oxygen therapy scenarios. Therefore, developing a trigger-type oxygen concentrator that integrates an ACW voltage stabilization structure and optimized signal transmission design for the humidification bottle has become an urgent technical requirement to be addressed in this field. Summary of the Invention

[0008] To address the technical problems of existing trigger-type oxygen concentrators where the humidification bottle blocks the negative pressure signal and internal heat dissipation negative pressure interferes with pressure compensation, this invention provides a trigger-type oxygen concentrator with ACW air capture function.

[0009] The present invention is achieved by the following technical solution: a trigger-type oxygen generator with ACW air capture function, including an oxygen generator shell and a trigger plate disposed inside the shell. A humidification bottle is fixedly connected to the side of the shell, and a humidification bottle tee is connected inside the humidification bottle. An ACW interface is opened on the surface of the shell, and a flow tube is connected to the outside of the trigger plate. A tee connector is connected to the flow tube. The humidification bottle's three-way tube includes three interface ends. The first interface end is sealed and connected to the air inlet channel of the humidification bottle. The second interface end extends into the humidification bottle and its port is located above the highest water level line of the humidification bottle. The third interface end is sealed and connected to the oxygen inlet through a flexible tube, forming an independent negative pressure signal acquisition path. One end of the tee connector, which is directly connected to the flow tube, is connected to the oxygen inlet connector on the outside. The tee connector is connected to a branch connector on the outside. The branch connector is connected to a micro-pressure sensor on the outside. The surface of the micro-pressure sensor is connected to an ACW connector. The ACW connector is connected to the ACW interface, and the oxygen inlet connector is connected to the oxygen inlet on the surface of the outer casing. The outer casing houses structural components, including an intake and exhaust silencer box, a pump core silencer box, connecting clips, a molecular sieve barrel, a pressure regulating valve, a first connecting pipe, a three-way valve, a second connecting pipe, a third connecting pipe, a normally closed valve, a normally open valve, a turbo fan, a compressor, an intake bend, an intake pipe, an atmospheric valve bend, an exhaust bend, an exhaust pipe, a straight connector, and an SNT assembly. The intake bend and intake pipe form an intake channel with the compressor, while the exhaust bend, exhaust pipe, and straight connector form an exhaust channel, creating an internal dual-channel system. The three-way valve is connected to the first, second, and third connecting pipes, respectively. The third connecting pipe connects the normally closed and normally open valves in series. The molecular sieve barrel is secured with clips and forms a gas processing passage with the pressure regulating valve and the three-way valve.

[0010] As a further optimization of the present invention, the ACW interface is located on the side of the oxygen concentrator housing and is directly connected to the outside air. One end of the ACW connector is sleeved and engaged with the ACW interface. This optimization effectively prevents gas leakage through the sleeved and engaged connection method, ensuring that the micro-pressure sensor can continuously collect the external environmental pressure and guarantee the accuracy of pressure compensation.

[0011] As a further optimization of the present invention, the detection accuracy of the micro-pressure sensor is ±.MPa, and its surface is provided with two connectors of the same specification. The two connectors are respectively connected to the branch pipe and the ACW pipe through interference fit. This optimization scheme, through the high-precision sensor and interference fit connection, can accurately capture the weak negative pressure signal generated by the patient's inhalation and the external environmental pressure, avoid distortion during signal transmission, and improve the accuracy of trigger response.

[0012] As a further optimization of the present invention, the trigger board integrates a signal amplification module and a filtering module for processing the negative pressure signal transmitted by the micro-pressure sensor. This optimization can specifically amplify the negative pressure signal attenuated by the long pipeline and humidification bottle, while filtering out noise interference caused by airflow disturbance, making the signal transmitted to the main control system purer and avoiding false triggering or trigger delay of the equipment.

[0013] As a further optimization of the present invention, the intake and exhaust silencer box and the pump core silencer box are fixed together by connecting buckles. The top of the pump core silencer box has a flow port and a silencer is installed at the top. The exhaust silencer box has a turbine fan fixed inside by a shell frame, and the air outlet of the turbine fan is connected to the flow port. The flow port is correspondingly connected to the intake and exhaust silencer boxes. This optimization solution forms a complete noise reduction airflow channel, which can effectively reduce turbulence noise and component vibration noise during gas flow, significantly reduce equipment operating noise, and improve patient comfort.

[0014] As a further optimization of the present invention, the exhaust port of the turbine fan faces the heat dissipation fins of the compressor inside the pump core silencer box, and the air inlet of the turbine fan is connected to the heat dissipation airflow outlet of the intake and exhaust silencer box; this optimization solution forms a dedicated heat dissipation airflow path, which can continuously remove the heat generated by the compressor during operation, ensure the compressor operating temperature is stable, and avoid component aging or operational failure caused by overheating.

[0015] As a further optimization of the present invention, the second port of the three-way valve is sealed to one end of the second connecting pipe, and the other end of the second connecting pipe is connected to the normally closed valve; the third port of the three-way valve is sealed to one end of the third connecting pipe, and the other end of the third connecting pipe is fixedly connected to the air inlet of the normally open valve; this optimization scheme, through the segmented sealing connection structure, ensures no leakage at the gas path interface, guarantees the pressure stability of the gas processing passage, avoids fluctuations in oxygen supply concentration or distortion of trigger signals due to leakage, and improves the response accuracy of mode switching.

[0016] As a further optimization of the present invention, the outlet end of the pressure regulating valve is sealed and sleeved with one end of the first connecting pipe, and the other end of the first connecting pipe is locked and fixed to the first interface of the three-way valve by threads; this optimization forms a reliable gas conduction path between the molecular sieve barrel and the three-way valve, and the pressure regulating valve can stabilize the high concentration of oxygen produced by the molecular sieve barrel, avoiding damage to the respiratory tract due to excessive pressure or affecting the oxygen supply efficiency due to excessively low pressure.

[0017] As a further optimization of the present invention, the second interface end of the humidification bottle three-way pipe is located above the highest water level line of the humidification bottle, and the third interface end is sealed and connected to the oxygen inlet through a flexible tube; this optimization solution forms an independent negative pressure signal acquisition path, allowing the negative pressure signal to bypass the water body barrier, ensuring that the humidification function of the humidification bottle and the transmission of negative pressure signals do not interfere with each other, and solving the problem that underwater signals cannot penetrate in the prior art.

[0018] As a further optimization of the present invention, the flow pipe arrangement path avoids the airflow influence area of ​​the turbine fan; this optimization can reduce the interference of heat dissipation airflow on negative pressure signal transmission, ensure signal stability during transmission, and avoid signal noise caused by airflow disturbance.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention innovatively solves the key problem of internal heat dissipation negative pressure interference pressure compensation through an ACW air capture structure. The ACW interface on the side of the outer casing directly connects to the outside air, providing a continuous and accurate environmental pressure reference for the micro-pressure sensor. Combined with a high-precision sensor and interference fit connection, it accurately calibrates the negative pressure signal attenuated by the 2-meter nasal oxygen tube, effectively offsetting the influence of the small internal negative pressure generated by the turbine fan cooling, avoiding insufficient trigger sensitivity or false triggering. The device can respond to the patient's respiratory rhythm in real time, supplying oxygen promptly during inhalation and stopping during exhalation, reducing oxygen waste and improving the synchronicity of oxygen supply and respiration, significantly optimizing the oxygen therapy effect.

[0020] 2. This invention effectively resolves the core contradiction between humidification and precise triggering in traditional trigger-type oxygen concentrators. It constructs an independent negative pressure signal acquisition path through a three-way connector on the humidification bottle, completely eliminating the industry pain point of water blocking the negative pressure signal. Oxygen is fully humidified by underwater bubbling, avoiding dry oxygen irritating the respiratory mucosa and ensuring comfort during oxygen therapy. The negative pressure signal bypasses the water body through an interface extending above the highest water level, precisely transmitting through a sealed, independent path. This ensures the device captures the patient's inhalation in real time, eliminating oxygen supply delays caused by signal blockage, achieving "humidification without signal interference." It balances oxygen therapy comfort and triggering accuracy, making it suitable for diverse scenarios such as clinical treatment and home oxygen therapy.

[0021] 3. The optimized signal processing and hardware configuration of this invention further improves the trigger response accuracy. The signal amplification module integrated into the trigger board amplifies the weak negative pressure signal by 50-100 times, and the filtering module effectively filters out noise interference caused by airflow disturbances, ensuring that the signal transmitted to the main control system is pure and stable. The interference fit between the high-precision micro-pressure sensor and the tubing eliminates signal transmission distortion, and can accurately capture the weak negative pressure signal generated by the patient's inhalation even in long-distance nasal oxygen cannula usage scenarios. This design effectively solves the problems of signal attenuation and noise interference, avoids trigger delays or false triggers, ensures the timeliness and accuracy of oxygen supply response, and enhances the reliability of the equipment in complex operating environments.

[0022] 4. This invention achieves a balance between equipment stability and user comfort through systematic optimization of its internal structure. The turbine fan and silencer box form a dedicated heat dissipation airflow path, precisely targeting the compressor's heat dissipation fins to efficiently remove operating heat, ensuring stable compressor temperature, preventing component aging or malfunctions caused by overheating, and extending the equipment's lifespan. Simultaneously, the intake and exhaust silencers and silencers form a complete noise reduction channel, significantly reducing airflow turbulence and component vibration noise, improving the patient's experience. The sealed design of the airway interface and the pressure stabilization function of the pressure regulating valve ensure balanced oxygen concentration and pressure, preventing concentration fluctuations caused by leakage, eliminating irritation to the respiratory tract from excessively high or low pressure, and comprehensively improving the safety and comfort of oxygen therapy. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure of region A in the middle; Figure 3 For the present invention Figure 1 Enlarged schematic diagram of the structure of region B in the middle; Figure 4 For the present invention Figure 1 Schematic diagram of the split structure on the back of the inner and outer shells; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure of region C in the middle; Figure 6 This is a schematic diagram of the humidification bottle connection structure of the present invention; Figure 7 This is a schematic diagram of the disassembled structure of the humidification bottle of the present invention; Figure 8 This is a schematic diagram of the internal structure of the oxygen generator of the present invention; Figure 9 This is a schematic diagram of the ACW working component structure of the present invention; Figure 10 For the present invention Figure 8 Diagram of the split state of the middle structure; Figure 11 For the present invention Figure 10 Diagram of the split state of the middle structure; Figure 12 For the present invention Figure 11 Enlarged schematic diagram of the upper middle section structure; Figure 13 For the present invention Figure 12 Schematic diagram of the disassembled state of the middle structure; Figure 14 This is a schematic diagram of the compressor connection structure of the present invention; Figure 15 For the present invention Figure 14 Schematic diagram of the mid-plane structure connection; Figure 16 For the present invention Figure 14 A schematic diagram of the second perspective of the structure.

[0024] Explanation of key symbols: 1. Oxygen concentrator housing; 2. Structural components; 21. Inlet and outlet silencer box; 22. Pump core silencer box; 221. Flow port; 222. Silencer; 23. Connecting clip; 24. Molecular sieve barrel; 25. Pressure regulating valve; 26. First connecting pipe; 27. Three-way valve; 28. Second connecting pipe; 29. ​​Third connecting pipe; 210. Normally closed valve; 211. Normally open valve; 212. Turbine fan; 213. Compressor; 214. Inlet bend; 215. Inlet pipe; 216. Atmospheric valve bend; 217. Outlet bend; 218. Outlet pipe; 219. Straight-through interface; 220. SNT025, component; 3. Humidification bottle; 31. Humidification bottle tee; 311. First interface end; 312. Second interface end; 313. Third interface end; 32. Nasal oxygen cannula; 4. ACW interface; 5. Trigger board; 6. Flow tube; 7. T-connector; 8. Oxygen inhalation port connector; 81. Oxygen inhalation port; 9. Branch connector; 10. Micro-pressure sensor; 11. ACW connector. Detailed Implementation

[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] Example 1: Please combine Figures 1-9 This embodiment solves the problem that the negative pressure signal is blocked after water is added to the humidification bottle, and transmits the signal by bypassing the water surface through a dedicated three-way tube; the negative pressure interference caused by heat dissipation inside the machine is calibrated by using the ACW interface to connect to the outside air for correction. This embodiment specifically proposes a trigger-type oxygen generator with ACW air capture function, including an oxygen generator housing 1 and a trigger plate 5 disposed inside the housing 1. A humidification bottle 3 is fixedly connected to the side of the housing 1, and a humidification bottle three-way pipe 31 is connected inside the humidification bottle 3. An ACW interface 4 is opened on the surface of the housing 1, and a flow pipe 6 is connected to the outside of the trigger plate 5. A three-way connector 7 is connected to the flow pipe 6. The humidifier bottle 3 has a three-way pipe 31 with three interface ends. The first interface end 311 is sealed and connected to the air inlet channel of the humidifier bottle 3. The second interface end 312 extends into the humidifier bottle 3 and its port is located above the highest water level line of the humidifier bottle. The third interface end 313 is sealed and connected to the oxygen inlet 81 through a hose, forming an independent negative pressure signal acquisition path. The specific technical solution involves the high-concentration oxygen produced by the oxygen generator being first delivered to the humidification bottle 3 via a gas path. The humidification bottle 3 is filled with an appropriate amount of water, with the water level between the highest and lowest water level lines. Its core function is to humidify the dry oxygen, preventing irritation to the patient's respiratory mucosa. After entering the humidification bottle 3, the oxygen is connected to the air inlet channel of the humidification bottle 3 through the first interface 311 of the three-way tube 31, extending directly underwater. The oxygen is humidified by bubbling underwater and making full contact with the water. The humidified oxygen is then discharged from the output end of the humidification bottle 3, and then sequentially connected to the nasal cannula 32 through the oxygen inhalation port connector 8 and the oxygen inhalation port 81, ultimately being delivered to the patient.

[0027] Furthermore, the key technical problem solved is that traditional humidifier bottles block negative pressure signal transmission after water is added. This problem is solved through the special design of the humidifier bottle's three-way tube 31: the second interface end 312 of the humidifier bottle's three-way tube 31 extends above the highest water level inside the humidifier bottle 31, specifically for collecting negative pressure signals, avoiding contact with water to prevent obstruction; the third interface end 313 is sealed and connected to the oxygen inhalation port 81 through a flexible tube, forming a negative pressure signal collection path independent of the oxygen humidification path. When the patient inhales, the generated negative pressure signal is transmitted to the oxygen inhalation port 81 through the nasal cannula 32, and then enters the humidifier bottle's three-way tube 31 through the third interface end 313. After bypassing the water surface obstruction, it is led out from the second interface end 312 to the subsequent signal transmission pipeline, ensuring that the negative pressure signal is not blocked by water, thus solving the industry pain point of "underwater signals cannot penetrate" in existing technologies.

[0028] Among them, the end of the three-way connector 7 directly connected to the flow pipe 6 is connected to the oxygen inhalation port connector 8, the three-way connector 7 is connected to the branch connector 9, the branch connector 9 is connected to the micro pressure sensor 10, and the surface of the micro pressure sensor 10 is connected to the ACW connector 11. Among them, ACW connector 11 is connected to ACW interface 4, and oxygen inlet connector 8 is connected to oxygen inlet 81 opened on the surface of outer shell 1.

[0029] It should be noted that the ACW interface 4 is located on the side of the oxygen concentrator housing 1 and is directly connected to the outside air. One end of the ACW connector 11 is sleeved and engaged with the ACW interface 4 to prevent gas leakage.

[0030] The specific technical solution involves the internal turbine fan 212 of the oxygen concentrator drawing air out of the casing during operation, creating a slight negative pressure. If the sensor pressure compensation port is located within this internal environment, it will cause distortion in compensation accuracy. This, combined with the signal attenuation from the two-meter nasal oxygen cannula 3232, can lead to trigger malfunction or false triggering. This problem is addressed through collaborative solutions using ACW-related structures. ACW interface 4 is located on the side of the oxygen concentrator housing 1, directly connected to the outside air, and always in a continuous state of connection without the need for switch control. Its core function is to provide an external environmental pressure reference for the micro-pressure sensor 10. One end of the ACW connector 11 is connected to the ACW interface 4 through a locking and sealing fit, and the other end is fixed to one of the connectors of the micro-pressure sensor 10 through an interference fit, enabling the micro-pressure sensor 10 to collect external environmental pressure in real time.

[0031] Furthermore, the micro-pressure sensor 10 has a detection accuracy of ±0.001MPa. The surface of the micro-pressure sensor 10 has two identical connectors, which are respectively connected to the branch connector 9 and the ACW connector 11 via interference fit. The trigger board 5 integrates a signal amplification module and a filtering module for processing the negative pressure signal transmitted by the micro-pressure sensor 10.

[0032] The micro-pressure sensor 10 has a detection accuracy of ±0.001MPa. Its other connector is connected to the branch pipe 9 via an interference fit to receive the patient's inhalation negative pressure signal transmitted from the negative pressure signal acquisition channel. Since the negative pressure signal will attenuate after being transmitted through the two-meter nasal oxygen tube 32 and the humidification bottle 3 chamber, the micro-pressure sensor 10 obtains the external environmental pressure through the ACW pipe 11 as a compensation benchmark to calibrate the attenuated negative pressure signal in real time, thereby offsetting the interference of the small negative pressure inside the oxygen concentrator and ensuring that the signal accuracy received by the sensor meets the triggering requirements, avoiding the problem of "weak signal leading to failure to trigger or false triggering" in the prior art.

[0033] Furthermore, the negative pressure signal collected and exported by the tee tube 31 of the humidification bottle is transmitted to the tee connector 7 through a pipeline. The tee connector 7 is connected to the pipeline outside the trigger plate 5 through the flow pipe 6, and at the same time, the negative pressure signal is diverted to the micro-pressure sensor 10 through the branch pipe 9. The flow pipe 6 is arranged to avoid the airflow area of ​​the internal cooling fan, reducing the impact of airflow interference on signal transmission and ensuring stable signal transmission.

[0034] The trigger board 5 integrates a signal amplification module and a filtering module. Addressing the issue of weak negative pressure signals in existing technologies, the signal amplification module amplifies the weak negative pressure signal transmitted by the micro-pressure sensor 10 by 50-100 times, filtering out noise interference during signal transmission and resulting in a purer signal. The processed, precise negative pressure signal is then transmitted to the oxygen concentrator's main control system as the core control signal for triggering oxygen supply, ensuring that the main control system can accurately identify the patient's inhalation.

[0035] Example 2: Please combine Figures 10-16The outer casing 1 contains a structural component 2; the structural component 2 includes an intake and exhaust silencer box 21, a pump core silencer box 22, a connecting buckle 23, a molecular sieve barrel 24, a pressure regulating valve 25, a first connecting pipe 26, a three-way valve 27, a second connecting pipe 28, a third connecting pipe 29, a normally closed valve 210, a normally open valve 211, a turbine fan 212, a compressor 213, an intake bend 214, an intake pipe 215, an atmospheric valve bend 216, an exhaust bend 217, an exhaust pipe 218, a straight-through interface 219, and an SNT025 component 220; The intake bend 214, intake pipe 215 and compressor 213 form an intake channel, and the outlet bend 217, outlet pipe 218 and straight interface 219 form an outlet channel. The two channels constitute an internal double channel. The three-way valve 27 is connected to the first connecting pipe 26, the second connecting pipe 28 and the third connecting pipe 29 respectively. The third connecting pipe 29 is connected in series with the normally closed valve 210 and the normally open valve 211. The molecular sieve barrel 24 is snapped and fixed. The molecular sieve barrel 24, together with the pressure regulating valve 25 and the three-way valve 27, forms a gas treatment passage.

[0036] The exhaust muffler box 21 and the pump core muffler box 22 are fixed together by a connecting buckle 23. The top of the pump core muffler box 22 has a flow port 221 and a muffler 222 is installed on the top of the pump core muffler box 22. The exhaust muffler box 21 has a turbine fan 212 fixed inside by a shell frame. The air outlet of the turbine fan 212 is connected to the flow port 221. The flow port 221 is connected to the intake and exhaust muffler boxes 21 to form a noise reduction airflow channel.

[0037] The air outlet of the turbine fan 212 faces the heat dissipation fins of the compressor 213 inside the pump core silencer box 22, and the air inlet of the turbine fan 212 is connected to the heat dissipation air outlet of the intake and exhaust silencer box 21 to form a heat dissipation airflow passage.

[0038] The second port of the three-way valve 27 is sealed to one end of the second connecting pipe 28, and the other end of the second connecting pipe 28 is connected to the normally closed valve 210; the third port of the three-way valve 27 is sealed to one end of the third connecting pipe 29, and the other end of the third connecting pipe 29 is fixedly connected to the air inlet of the normally open valve 211.

[0039] The outlet of the pressure regulating valve 25 is sealed to one end of the first connecting pipe 26, and the other end of the first connecting pipe 26 is locked to the first interface of the three-way valve 27 by threads, forming a gas conduction passage between the molecular sieve barrel 24 and the three-way valve 27.

[0040] In the specific technical solution, external air first enters the intake pipe 215 through the intake bend 214, and after pressure balance is achieved through the atmospheric valve bend 216, it is delivered to the compressor 213 for compression. The compressed gas is delivered to the molecular sieve barrel 24 through the outlet bend 217 and outlet pipe 218. The molecular sieve barrel 24 is fixed to the inner wall of the intake and exhaust silencer box 21 and the pump core silencer box 22 by snap-fit. The molecular sieve barrel 24 separates nitrogen and oxygen inside to generate high-concentration oxygen. After the molecular sieve barrel 24 completes oxygen production and separation, the high-concentration oxygen is stabilized by the pressure regulating valve 25, and then the normally closed valve 210 and normally open valve 211 are used to control the flow. The external air is compressed and oxygen produced according to the process of "inlet bend 214 → inlet pipe 215 → atmospheric valve bend 216 → compressor 213 → outlet bend 217 → outlet pipe 218 → molecular sieve barrel 24". The high-concentration oxygen is discharged through the molecular sieve barrel 24 to the pressure regulating valve 25 and adjusted to a stable pressure.

[0041] Working principle: I. Working Principle of Oxygen Humidification and Negative Pressure Signal Acquisition Path The high-concentration oxygen produced by the oxygen concentrator is first delivered to the humidification bottle 3 via the gas path. The humidification bottle 3 is filled with an appropriate amount of water (the water level is between the highest and lowest water level lines). Its core function is to humidify the dry oxygen, preventing irritation to the patient's respiratory mucosa. After entering the humidification bottle 3, the oxygen is connected to the air inlet channel of the humidification bottle 3 through the first interface 311 of the humidification bottle's three-way tube 31, extending directly underwater. The oxygen is humidified by bubbling underwater and making full contact with the water. The humidified oxygen is then discharged from the output end of the humidification bottle 3, and then sequentially connected to the nasal cannula 32 through the oxygen inhalation port connector 8 and the oxygen inhalation port 81, ultimately being delivered to the patient.

[0042] The key technical problem solved is that traditional humidifier bottles block negative pressure signal transmission after water is added. This problem is solved through the special design of the humidifier bottle's three-way tube 31: the second interface end 312 of the humidifier bottle's three-way tube 31 extends above the highest water level inside the humidifier bottle 31, specifically for collecting negative pressure signals, avoiding contact with water to prevent obstruction; the third interface end 313 is sealed and connected to the oxygen inhalation port 81 through a flexible tube, forming a negative pressure signal collection path independent of the oxygen humidification path. When the patient inhales, the generated negative pressure signal is transmitted to the oxygen inhalation port 81 through the nasal cannula 32, and then enters the humidifier bottle's three-way tube 31 through the third interface end 313. After bypassing the water surface obstruction, it is led out from the second interface end 312 to the subsequent signal transmission pipeline, ensuring that the negative pressure signal is not blocked by water, thus solving the industry pain point of "underwater signals cannot penetrate" in existing technologies.

[0043] II. Working Principle of ACW Pressure Compensation and Signal Calibration The outlet of the turbine fan 212 faces the heat dissipation fins of the compressor 213 inside the pump core silencer box 22. The inlet of the turbine fan 212 is connected to the heat dissipation air outlet of the intake and exhaust silencer box 21, forming a heat dissipation airflow path of "intake and exhaust silencer box 21 - turbine fan 212 - compressor 213", which continuously removes the heat generated by the compressor 213 during operation and prevents the equipment from affecting the stability of operation due to overheating.

[0044] When the internal turbine fan 212 of the oxygen concentrator is running, it draws air out of the casing, creating a slight negative pressure. If the sensor pressure compensation port is located in this internal environment, it will cause distortion in the compensation accuracy. This, combined with the signal attenuation caused by the two-meter nasal oxygen cannula 3232, can lead to trigger failure or false triggering. This problem is solved through the coordinated design of related ACW structures: ACW interface 4 is located on the side of the oxygen concentrator housing 1, directly connected to the outside air, and always in a continuous state of connection without the need for switch control. Its core function is to provide an external environmental pressure reference for the micro-pressure sensor 10. One end of the ACW connector 11 is connected to the ACW interface 4 through a locking and sealing fit, and the other end is fixed to one of the connectors of the micro-pressure sensor 10 through an interference fit, enabling the micro-pressure sensor 10 to collect external environmental pressure in real time.

[0045] The micro-pressure sensor 10 has a detection accuracy of ±0.001MPa. Its other connector is connected to the branch pipe 9 via an interference fit to receive the patient's inhalation negative pressure signal transmitted from the negative pressure signal acquisition channel. Since the negative pressure signal will attenuate after being transmitted through the two-meter nasal oxygen tube 32 and the humidification bottle 3 chamber, the micro-pressure sensor 10 obtains the external environmental pressure through the ACW pipe 11 as a compensation benchmark to calibrate the attenuated negative pressure signal in real time, thereby offsetting the interference of the small negative pressure inside the oxygen concentrator and ensuring that the signal accuracy received by the sensor meets the triggering requirements, avoiding the problem of "weak signal leading to failure to trigger or false triggering" in the prior art.

[0046] III. Working Principle of Negative Pressure Signal Transmission and Processing The negative pressure signal collected and exported by the tee tube 31 of the humidification bottle is transmitted to the tee connector 7 through the pipeline. The tee connector 7 is connected to the pipeline outside the trigger plate 5 through the flow pipe 6, and at the same time, the negative pressure signal is diverted to the micro-pressure sensor 10 through the branch pipe 9. The flow pipe 6 is arranged to avoid the airflow area of ​​the internal cooling fan, reducing the impact of airflow interference on signal transmission and ensuring stable signal transmission.

[0047] The trigger board 5 integrates a signal amplification module and a filtering module. Addressing the issue of weak negative pressure signals in existing technologies, the signal amplification module amplifies the weak negative pressure signal transmitted by the micro-pressure sensor 10 by 50-100 times, filtering out noise interference during signal transmission and resulting in a purer signal. The processed, precise negative pressure signal is then transmitted to the oxygen concentrator's main control system as the core control signal for triggering oxygen supply, ensuring that the main control system can accurately identify the patient's inhalation.

[0048] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A trigger-type oxygen generator with an ACW air capturing function, characterized in that, The application relates to an oxygen generator shell (1) and a trigger plate (5) arranged in the shell (1), the side surface of the shell (1) is fixedly connected with a humidification bottle (3), the inside of the humidification bottle (3) is connected with a humidification bottle three-way pipe (31), the humidification bottle three-way pipe (31) is connected with a nasal oxygen tube (32), the surface of the shell (1) is provided with an ACW interface (4), the outside of the trigger plate (5) is connected with a flow pipe (6), and the flow pipe (6) is connected with a three-way joint (7). The humidification bottle three-way pipe (31) in the humidification bottle (3) comprises three interface ends, a first interface end (311) is sealingly connected with an air inlet channel of the humidification bottle (3), a second interface end (312) extends into the humidification bottle (3) and has a port located above the highest water level line of the humidification bottle, and a third interface end (313) is sealingly communicated with an oxygen inhalation port (81) through a hose, thereby forming an independent negative pressure signal collection channel. One end of the three-way joint (7) is connected with an oxygen inhalation port connecting pipe (8) outside via the flow pipe (6), the three-way joint (7) is connected with a branch connecting pipe (9) outside, the branch connecting pipe (9) is connected with a micro pressure sensor (10) outside, and the surface of the micro pressure sensor (10) is connected with an ACW connecting pipe (11). The ACW connecting pipe (11) is connected with the ACW interface (4), and the oxygen inhalation port connecting pipe (8) is connected with an oxygen inhalation port (81) arranged on the surface of the shell (1).

2. The trigger-type oxygen generating apparatus having an ACW air trapping function according to claim 1, wherein The ACW interface (4) is arranged on the side surface of the oxygen generator shell (1) and is directly communicated with external air, one end of the ACW connecting pipe (11) is sleeved and engaged with the ACW interface (4), and gas leakage is prevented.

3. The trigger-type oxygen generating apparatus having an ACW air trap function according to claim 1, wherein The detection precision of the micro pressure sensor (10) is + / -0.001MPa, two identical mouthpieces are arranged on the surface of the micro pressure sensor (10), and the two mouthpieces are connected with the branch connecting pipe (9) and the ACW connecting pipe (11) through interference fit.

4. The trigger-type oxygen generating apparatus having an ACW air trap function according to claim 1, wherein A signal amplification module and a filter module are integrated on the trigger plate (5) and used for processing the negative pressure signal transmitted by the micro pressure sensor (10).

5. The trigger-type oxygen generating apparatus having an ACW air trap function according to claim 1, wherein A structure assembly (2) is arranged in the shell (1); the structure assembly (2) comprises an air inlet and outlet silencer box (21), a pump core silencer box (22), a connecting buckle (23), a molecular sieve barrel (24), a pressure regulating valve (25), a first connecting pipe (26), a three-way valve (27), a second connecting pipe (28), a third connecting pipe (29), a normally closed valve (210), a normally open valve (211), a turbine fan (212), a compressor (213), an air inlet elbow (214), an air inlet pipe (215), an atmospheric valve elbow (216), an air outlet elbow (217), an air outlet pipe (218), a straight-through interface (219) and an SNT025 assembly (220). The intake elbow (214), the intake pipe (215) and the compressor (213) form an intake passage, the outlet elbow (217), the outlet pipe (218) and the straight-through interface (219) form an outlet passage, and the two passages constitute an internal double passage; the three-way valve (27) is connected with the first connecting pipe (26), the second connecting pipe (28) and the third connecting pipe (29) respectively, the third connecting pipe (29) is connected with the normally closed valve (210) and the normally open valve (211) in sequence, the molecular sieve barrel (24) is clamped and fixed, the molecular sieve barrel (24) is connected with the pressure regulating valve (25) and the three-way valve (27) to form a gas treatment passage.

6. The trigger-type oxygen generating apparatus having an ACW air trap function according to claim 5, wherein The exhaust silencer box (21) and the pump core silencer box (22) are clamped and fixed through the connecting buckle (23), the top end of the pump core silencer box (22) is provided with a flow-through port (221), and the top end of the pump core silencer box (22) is provided with a silencer (222); the inside of the exhaust silencer box (21) is fixed with a turbine fan (212) through a shell frame, and the air outlet of the turbine fan (212) communicates with the flow-through port (221); the flow-through port (221) communicates with the intake and exhaust silencer box (21) in correspondence, forming a noise reduction air flow passage.

7. The trigger-type oxygen generating apparatus having an ACW air trap function according to claim 5, wherein The air outlet of the turbine fan (212) faces the heat dissipation fins of the compressor (213) in the pump core silencer box (22), the air inlet of the turbine fan (212) communicates with the heat dissipation air outlet of the intake and exhaust silencer box (21), forming a heat dissipation air flow passage.

8. The trigger-type oxygen generating apparatus having an ACW air trap function according to claim 5, wherein The second interface of the three-way valve (27) is sealingly connected with one end of the second connecting pipe (28), and the other end of the second connecting pipe (28) is connected with the normally closed valve (210); the third interface of the three-way valve (27) is sealingly connected with one end of the third connecting pipe (29), and the other end of the third connecting pipe (29) is fixedly connected with the air inlet end of the normally open valve (211).

9. The trigger-type oxygen generating apparatus having an ACW air trap function according to claim 5, wherein The air outlet end of the pressure regulating valve (25) is sealingly sleeved with one end of the first connecting pipe (26), the other end of the first connecting pipe (26) is fixedly connected with the first interface of the three-way valve (27) through threads, forming a gas conduction passage between the molecular sieve barrel (24) and the three-way valve (27).

Images