Dual-mode oxygen generator with internal dual channels

Abstract

The invention discloses a dual-mode oxygen generator with two channels inside, and relates to the field of medical oxygen generators. The oxygen generator comprises an oxygen generator outer shell and an internal structure assembly, wherein the structure assembly comprises key components such as an air intake and exhaust silencing box, a molecular sieve barrel, a three-way valve, a normally-closed valve, a normally-open valve and a turbofan. The oxygen generator is internally provided with two independent channels consisting of an air inlet channel and an air outlet channel, and has a continuous flow mode and a triggering mode, wherein the continuous flow mode is continuously adjustable at 1-5L / min through throttling adjustment; the triggering mode responds to a negative pressure signal through double-valve alternate electrification, the oxygen flow rate peak value reaches 16 L / min, and the two modes can be switched independently. The equipment is further provided with a special heat dissipation channel and a noise reduction structure, it is ensured that the working temperature of the compressor is stabilized at 40-60 DEG C, and operation noise is remarkably reduced. The oxygen therapy device is suitable for requirements of patients with different hypoxia degrees, oxygen therapy accuracy and breathing comfort are improved, and the oxygen therapy device is suitable for clinical treatment and family oxygen therapy scenes.

Description

Technical Field

[0001] This invention relates to the field of medical oxygen concentrators, and more particularly to a dual-mode oxygen concentrator with internal dual channels. Background Technology

[0002] Oxygen concentrators are commonly used devices in the medical and health field. They can be used for both clinical treatment in hospitals and for supplementing oxygen to people with hypoxia at home. Their core function is to provide hypoxic patients with a stable, high concentration of oxygen to help them improve their hypoxic state and alleviate discomfort symptoms. With the development of oxygen therapy technology, most oxygen concentrators on the market are based on a continuous flow mode of "constantly producing oxygen," and a few models have tried a "trigger mode." However, these oxygen concentrators still have many unresolved problems in actual use, and cannot simultaneously meet the patient's physiological respiratory needs and ensure long-term stable operation of the equipment.

[0003] Most traditional oxygen concentrators currently only have one operating mode—continuous flow mode. In this mode, the flow control valve regulates the output of oxygen at a fixed rate (generally 1-5 liters per minute). However, human breathing involves alternating inhalation and exhalation. An adult can normally inhale 600-800 ml of air in one breath (this is called tidal volume). Even at the highest setting (5 liters per minute), traditional oxygen concentrators, when spread over a single inhalation, only deliver about 100 ml of effective oxygen, which is far from meeting the needs of a patient. Insufficient oxygen causes patients to unconsciously inhale large amounts of air, diluting the actual oxygen concentration and significantly reducing the effectiveness of oxygen supplementation. This problem is particularly pronounced in severely ill patients with poor oxygen intake, or in the elderly.

[0004] Moreover, this continuous oxygen delivery mode is inherently out of sync with the rhythm of human breathing: while the patient exhales, the oxygen concentrator continues to deliver oxygen into the respiratory tract, creating a "human-machine conflict"—the air delivered by the machine is working against the action of exhalation. This not only makes breathing more difficult and uncomfortable for the patient, but also, in the long run, can damage the nasal mucosa. More importantly, continuous oxygen delivery during exhalation blocks the normal expulsion of carbon dioxide from the body, making it easy for carbon dioxide to accumulate and affecting the normal functioning of the respiratory and circulatory systems.

[0005] To address these issues, some oxygen concentrators have implemented a "trigger mode": this detects the slight suction force generated when a patient inhales (called a negative pressure signal) and then triggers the machine to deliver oxygen. However, this design relies on a single valve control, which has inherent structural flaws. Firstly, this valve is mostly controlled by an electronic throttle valve, which is difficult to completely close, resulting in some oxygen leakage. This small amount of leaked oxygen interferes with the weak suction signal, especially when a two-meter-long oxygen tubing connects the patient and the concentrator. The already weak suction signal becomes even weaker, leading to slow machine response, insufficient sensitivity, and inability to deliver oxygen promptly. Secondly, this single valve requires continuous power to operate, consuming a lot of electricity and causing premature valve wear, shortening the concentrator's lifespan and increasing subsequent maintenance costs.

[0006] In summary, existing oxygen concentrators have significant shortcomings in terms of oxygen supply adaptability, breathing comfort, triggering accuracy, and equipment durability, and cannot simultaneously meet the physiological needs of patients and the requirements for stable operation of the equipment.

[0007] Based on this, we propose a dual-mode oxygen generator with internal dual channels. Summary of the Invention

[0008] To address the technical problems of existing oxygen concentrators in terms of oxygen supply adaptability, breathing comfort, triggering accuracy, and equipment durability, this invention provides a dual-mode oxygen concentrator with internal dual channels.

[0009] This invention employs the following technical solution: To address the technical problems of insufficient oxygen supply adaptability, breathing comfort, triggering accuracy, and equipment durability in existing oxygen concentrators, this invention provides a dual-mode oxygen concentrator with internal dual channels, comprising an oxygen concentrator housing and structural components disposed within the housing; the structural components include 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 turbine fan, a compressor, an intake bend, an intake pipe, an atmospheric valve bend, an exhaust bend, an exhaust pipe, a straight-through interface, and an SNT025 component.

[0010] The intake bend, intake pipe and compressor form an intake channel, the outlet bend, outlet pipe and straight interface form an outlet channel, the two channels constitute an internal dual channel; the three-way valve is connected to the first connecting pipe, the second connecting pipe and the third connecting pipe respectively, wherein the second connecting pipe is connected to the normally closed valve and the third connecting pipe is connected to the normally open valve. These two outlet paths are connected in parallel. The molecular sieve barrel is clamped and fixed, and forms a gas treatment passage with the pressure regulating valve and the three-way valve. The compressor is fixed to the mounting base inside the pump core silencer box by bolts, ensuring that the shock-absorbing pad at the bottom of the compressor is completely in contact with the mounting base to reduce the transmission of operating vibration; the turbine fan is fixed to the inside of the intake and exhaust silencer box by bolts to the housing frame, and the fan angle is adjusted so that the air outlet is directly facing the heat dissipation fins of the compressor, and the air inlet is aligned and connected with the heat dissipation air outlet of the intake and exhaust silencer box.

[0011] The exhaust muffler box and the pump core muffler box are fixed together by connecting buckles. The top of the pump core muffler box has a flow port and a muffler is installed on the top of the pump core muffler box. The exhaust muffler box has a turbine fan fixed inside by the shell frame. The air outlet of the turbine fan is connected to the flow port. The flow port is connected to the intake and exhaust muffler boxes to form a noise reduction airflow channel.

[0012] Assembly of the outer casing and the muffler box: The intake and exhaust muffler box and the pump core muffler box are aligned and snapped together by connecting buckles, ensuring that the buckles are fully embedded in the slots to achieve a tight fixation between the two; a muffler is embedded at the top of the pump core muffler box and fixed by an interference fit to prevent loosening noise when airflow passes through.

[0013] The two ends of the molecular sieve barrel are respectively snapped into the inner walls of the inlet and outlet silencer box and the pump core silencer box by buckles. The air inlet end of the molecular sieve barrel and the air inlet end of the pressure regulating valve are sealed and connected by a rubber hose.

[0014] The two ends of the molecular sieve barrel are inserted into the positioning grooves of the upper and lower frames to achieve horizontal fixation of the molecular sieve barrel; an oxygen-resistant silicone rubber hose is used to seal the gas inlet end of the molecular sieve barrel with the gas inlet end of the pressure regulating valve to prevent high-pressure gas leakage.

[0015] The exhaust port of the turbo fan faces the heat dissipation fins of the compressor inside the pump core silencer box, and the air inlet of the turbo fan is connected to the heat dissipation air outlet of the intake and exhaust silencer box, forming a heat dissipation airflow path from the intake and exhaust silencer box to the turbo fan and the compressor.

[0016] The outlet of the pressure regulating valve is sealed to one end of the first connecting pipe, and the other end of the first connecting pipe is threaded and locked to the first port of the three-way valve, forming a gas conduction path between the molecular sieve barrel and the three-way valve. 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 a 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 inlet of the normally open valve.

[0017] The oxygen concentrator has two external modes: continuous flow mode and trigger mode. In continuous flow mode, the flow rate is continuously adjustable from 1 to 5 L / min through throttling. In this mode, the normally closed valve and normally open valve are kept de-energized. The oxygen flow through the normally open valve relies on the throttling valve to regulate the flow rate, avoiding wear and tear on the solenoid valve caused by prolonged energization. In trigger mode, the normally closed valve and normally open valve alternately operate in response to the negative pressure signal generated by human inhalation. In this mode, the gas can be delivered through the gas processing passage, the trigger mode control passage, and the outlet passage. The two modes can be switched independently through internal dual channels.

[0018] As a further optimization of the present invention, the 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 using an interference fit. A turbine fan is fixed inside the exhaust silencer box by bolts to the shell frame. The air outlet of the turbine fan is connected to the flow port, and the flow port is connected to the inlet and exhaust silencer boxes to form a noise-reducing airflow channel. This optimization solution can effectively reduce turbulence noise and component vibration noise during gas flow by using a snap-fit ​​sealing silencer box, embedded installation of the silencer, and optimization of the airflow channel. This reduces the operating noise of the equipment, improves the comfort of patients, and is especially suitable for home nighttime oxygen therapy scenarios.

[0019] 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, forming a heat dissipation airflow path of intake and exhaust silencer box - turbine fan - compressor; the turbine fan runs at a default speed of 1500-2000 rpm, and achieves closed-loop temperature control with the help of a temperature sensor. When the compressor temperature exceeds 60℃, the speed is automatically increased to 2500 rpm, which can stabilize the compressor operating temperature within the range of 40-60℃, avoiding component aging or malfunction caused by overheating.

[0020] 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 snapped and fixed 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; through the segmented sealing connection structure of the three-way valve and the valve, it can be ensured that there is no leakage at the gas circuit interface, the pressure stability of the gas processing passage can be guaranteed, the fluctuation of oxygen supply concentration or the distortion of trigger signal caused by leakage can be avoided, and the response accuracy of mode switching can be improved.

[0021] As a further optimization of the present invention, the continuous flow mode achieves continuous adjustment of 1-5L / min through throttling regulation. In this mode, the normally closed valve and the normally open valve remain de-energized. The oxygen conduction of the normally open valve relies on the electronic proportional throttling valve for closed-loop flow control, with a flow accuracy error of ≤±5%. The trigger mode is achieved by alternating power-on of the normally closed valve and the normally open valve in response to the negative pressure signal generated by human inhalation. The negative pressure signal feedback delay is ≤0.3 seconds. After the normally open valve is de-energized and gas conduction is initiated, the peak oxygen flow rate can reach 16L / min. The normally closed valve is energized with a delay of 0.1 seconds to assist in pressure stabilization. This optimization scheme, through dual-mode independent control logic, not only meets the needs of patients with severe hypoxia for continuous and stable oxygen supply, but also adapts to the rhythmic oxygen supply needs of patients with mild to moderate hypoxia. The power consumption in the trigger mode is significantly reduced compared to the continuous flow mode, while avoiding long-term power loss of the solenoid valve and extending the valve's service life.

[0022] 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 connection structure can form a reliable gas conduction path between the molecular sieve barrel and the three-way valve, and the pressure regulating valve can stabilize the pressure of the high-concentration oxygen produced by the molecular sieve barrel within a safe range of 0.045-0.08MPa, which avoids damage to the respiratory tract due to excessive pressure and prevents the oxygen supply efficiency from being affected by excessively low pressure, thus ensuring a constant output oxygen pressure.

[0023] As a further optimization of the present invention, the two ends of the molecular sieve barrel are respectively snapped into position with the inner walls of the inlet and outlet silencer box and the pump core silencer box by snap-fit. The air inlet end of the molecular sieve barrel and the air inlet end of the pressure regulating valve are sealed and connected by an oxygen-resistant silicone rubber hose. The snap-fit ​​positioning structure facilitates the disassembly and maintenance of the molecular sieve barrel. The silicone rubber hose can resist long-term oxygen corrosion, avoid pipeline aging and cracking, ensure the long-term reliability of the gas transmission path after oxygen production by the molecular sieve, and reduce equipment maintenance costs.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention significantly improves oxygen supply efficiency and oxygenation effect, solving the problem of insufficient oxygen supply adaptability in traditional oxygen concentrators. In trigger mode, the normally closed and normally open valves alternately respond to negative pressure signals, achieving a peak oxygen flow rate of up to 16L / min and increasing the actual tidal volume to 200-300 liters. This effectively avoids oxygen concentration dilution caused by air mixing, making it particularly beneficial for critically ill or elderly patients with poor oxygenation. It also features a continuously adjustable flow rate mode of 1-5L / min, with independent switching between the two modes. This meets the needs of severely hypoxic patients for continuous and stable oxygen supply while also adapting to the rhythmic oxygen supply needs of mild to moderate hypoxic patients, comprehensively improving the accuracy and effectiveness of oxygen therapy.

[0025] 2. This invention optimizes respiratory comfort and reduces the risk of mucosal damage and carbon dioxide retention. Addressing the "human-machine conflict" inherent in traditional continuous flow oxygen therapy, it employs an alternating valve opening and closing mechanism to achieve precise oxygen delivery during inhalation and closure of the passage during exhalation. This prevents backflow of air from irritating the nasal mucosa and reduces the risk of mucosal damage from long-term oxygen therapy. Simultaneously, the absence of oxygen obstruction during exhalation ensures smooth carbon dioxide expulsion, effectively resolving gas retention, reducing respiratory resistance, and improving patient respiratory comfort. It is more suitable for nighttime oxygen therapy and long-term home oxygen therapy, enhancing the patient experience.

[0026] 3. This invention effectively solves the problem of insufficient oxygen supply adaptability in existing oxygen concentrators through its internal independent dual-channel and dual-mode design. The continuous flow mode achieves precise adjustment from 1-5L / min via throttling, with a flow accuracy error ≤±5%, meeting the continuous and stable oxygen supply needs of patients with severe hypoxia. The trigger mode relies on the alternating power-on response of normally closed and normally open valves, with a negative pressure feedback delay ≤0.3 seconds and a peak oxygen flow rate of 16L / min, precisely matching the human respiratory rhythm. The two modes can be switched independently without airflow interruption, avoiding the "human-machine conflict" and carbon dioxide retention of the continuous flow mode, and solving the defects of signal attenuation and leakage in the single-valve trigger mode, significantly improving the oxygen therapy effect and respiratory comfort for patients with different degrees of hypoxia.

[0027] 4. This invention features an optimized structural design. In trigger mode, alternating energization of dual valves avoids the energy loss associated with prolonged energization of a single valve, significantly reducing power consumption compared to continuous flow mode. This offers the dual advantages of energy saving and extended valve lifespan. The coordinated action of the normally closed and normally open valves ensures rapid response and pressure stability in trigger mode while eliminating the leakage risks associated with electronic throttle valves, thus improving the accuracy of gas path control. Furthermore, in continuous flow mode, the valve remains closed, relying solely on the throttle valve for regulation, further reducing solenoid valve wear, lowering the probability of equipment failure and subsequent maintenance costs, and achieving a balance between high performance and low operating costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structural components connection structure of the oxygen generator of the present invention; Figure 3 For the present invention Figure 2 Diagram of the split state of the middle structure; Figure 4 For the present invention Figure 3 Diagram of the split state of the middle structure; Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the upper middle section structure; Figure 6 For the present invention Figure 5 Schematic diagram of the disassembled state of the middle structure; Figure 7 This is a schematic diagram of the compressor connection structure of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the mid-plane structure connection; Figure 9 For the present invention Figure 7 A schematic diagram of the second perspective of the structure.

[0029] Explanation of key symbols: 1. Oxygen concentrator outer casing; 2. Oxygen concentrator internal structural components; 21. Inlet and outlet silencer box; 22. Pump core silencer box; 221. Flow port; 222. Silencer; 23. Connecting buckle; 24. Molecular sieve barrel; 25. Pressure regulating valve; 26. First connecting pipe; 27. Three-way valve; 28. First 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. Detailed Implementation

[0030] 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.

[0031] Example 1: Please combine Figures 1-9 This embodiment proposes a dual-mode oxygen generator with internal dual channels, including an oxygen generator housing 1 and a structural component 2 disposed inside the housing 1; 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. The specific installation of the core power components: The compressor 213 is fixed to the pre-set mounting base inside the pump core silencer box 22 by bolts, ensuring that the shock-absorbing pad at the bottom of the compressor is completely in contact with the mounting base to reduce the transmission of operating vibration; the turbine fan 212 is fixed to the inside of the intake and exhaust silencer box 21 by bolts to the housing frame, and the fan angle is adjusted so that the air outlet is directly facing the heat dissipation fins of the compressor 213, and the air inlet is aligned and connected with the heat dissipation airflow outlet of the intake and exhaust silencer box 21.

[0032] The oxygen concentrator has two external modes: continuous flow mode and trigger mode. The continuous flow mode is adjustable from 1 to 5 L / min through throttling regulation. The trigger mode is achieved by alternating power-on of normally closed valve 210 and normally open valve 211 in response to negative pressure signals. The two modes are independently switched through internal dual channels.

[0033] In a further technical solution, the exhaust muffler box 21 and the pump core muffler box 22 are fixedly connected 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.

[0034] Specifically, the outer casing is assembled with the muffler box: the intake and exhaust muffler box 21 and the pump core muffler box 22 are aligned and snapped together by connecting buckles 23, ensuring that the buckles are fully embedded in the slots and the two are tightly fixed; a muffler 222 is embedded at the top of the pump core muffler box 22 and fixed by interference fit to prevent loose noise when airflow passes through.

[0035] It should be noted that the two ends of the molecular sieve barrel 24 are respectively engaged and positioned with the inner side walls of the inlet and outlet silencer box 21 and the pump core silencer box 22 by snap-fit. The air inlet end of the molecular sieve barrel 24 and the air inlet end of the pressure regulating valve 25 are sealed and connected by a rubber hose.

[0036] The specific connection between the molecular sieve barrel and the pressure regulating valve is as follows: the two ends of the molecular sieve barrel 24 are inserted into the positioning grooves of the upper and lower frames to achieve horizontal fixation of the molecular sieve barrel 24; an oxygen-resistant silicone rubber hose is used to seal the air inlet end of the molecular sieve barrel 24 with the air inlet end of the pressure regulating valve 25 to prevent high-pressure gas leakage.

[0037] It should be noted that 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 airflow outlet of the intake and exhaust silencer box 21, forming a heat dissipation airflow passage from the intake and exhaust silencer box 21 to the turbine fan 212 to the compressor 213.

[0038] 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 threadedly locked to the first interface of the three-way valve 27, forming a gas conduction passage between the molecular sieve barrel 24 and the three-way valve 27. The second interface 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 interface 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 inlet of the normally open valve 211.

[0039] The input end of the SNT025 component 220 is threadedly connected to the output end of the through interface 219, and a leak-proof gasket is provided at the connection between the SNT025 component 220 and the through interface 219.

[0040] It should be noted that the oxygen concentrator has two external modes: continuous flow mode and trigger mode. In continuous flow mode, the flow rate is continuously adjustable from 1 to 5 L / min through throttling. In this mode, the normally closed valve 210 and normally open valve 211 are kept de-energized. The oxygen flow through the normally open valve relies on the throttling valve to regulate the flow rate, avoiding wear and tear on the solenoid valve caused by prolonged energization. In trigger mode, the normally closed valve 210 and normally open valve 211 are alternately energized in response to the negative pressure signal generated by human inhalation. In this mode, the gas can be delivered through the gas processing passage, the trigger mode control passage, and the outlet passage. The two modes can be switched independently through internal dual channels.

[0041] A more detailed plan, including the assembly of gas piping and valves: Air intake passage: One end of the air intake bend 214 is connected to the air intake grille of the oxygen concentrator housing 1, and the other end is sealed to the air intake pipe 215. The other end of the air intake pipe 215 is fixed to the air intake port of the compressor 213 through a flange. Air outlet passage: Connect one end of the air outlet bend 217 to the air outlet of the compressor 213, and seal the other end to the air outlet pipe 218. The end of the air outlet pipe 218 is threaded to the straight-through interface 219, and a leak-proof gasket is installed at the interface. The three-way valve is connected to the valve as follows: one end of the first connecting pipe 26 is sealed to the outlet of the pressure regulating valve 25, and the other end is locked to the first port of the three-way valve 27 by thread; one end of the second connecting pipe 28 is sealed to the second port of the three-way valve 27, and the other end is snapped to the inlet of the normally closed valve 210; one end of the third connecting pipe 29 is sealed to the third port of the three-way valve 27, and the other end is fixed to the inlet of the normally open valve 211, forming a complete gas treatment passage.

[0042] II. Basic Principles of Dual-Channel Operation This oxygen concentrator has a dual-channel internal system, including an intake channel and an exhaust channel. These two channels operate independently yet work together to ensure efficient and stable gas flow. Air intake channel: External air is introduced through the intake bend 214 and delivered to the atmospheric valve bend 216 through the intake pipe 215 for pressure balancing to avoid airflow fluctuations affecting compression efficiency; the balanced air enters the compressor 213 and is compressed to a high pressure of 0.15-0.25MPa to provide a pressure basis for subsequent molecular sieve oxygen production.

[0043] Air outlet channel: The high-pressure air output by the compressor is delivered to the molecular sieve barrel 24 through the air outlet bend 217 and air outlet pipe 218. Nitrogen is removed by the adsorption and separation effect of the molecular sieve to generate high-concentration oxygen with a concentration of ≥90%. After the oxygen is stabilized to 0.045-0.08MPa by the pressure regulating valve 25, it is output to the user end.

[0044] III. Dual-mode operation control logic (a) Continuous Flow Mode Mode activation conditions: The user selects "Continuous Flow Mode" through the oxygen generator control panel and sets the target flow rate, which is adjustable within the range of 1-5L / min. After receiving the signal, the main control board controls the normally closed valve 210 and normally open valve 211 to remain de-energized, and only activates the throttle valve and the core gas path.

[0045] Flow regulation mechanism: The throttle valve adopts an electronic proportional regulating valve. The main control board outputs a corresponding control signal to adjust the opening of the throttle valve according to the flow value set by the user. The output flow is fed back in real time through the flow sensor to form a closed-loop control, ensuring that the flow accuracy is controlled within ±5%.

[0046] Operational advantages: In this mode, the solenoid valve does not need to be energized for a long time, avoiding the wear and tear caused by continuous operation of the solenoid valve and extending the service life of the equipment; at the same time, through precise adjustment by the throttle valve, it can meet the needs of scenarios that require continuous and stable oxygen supply, such as nighttime oxygen therapy for patients with severe hypoxia and sleep apnea syndrome.

[0047] (ii) Triggering mode Mode activation conditions: After the user selects "trigger mode", the main control board activates the pressure sensor and valve control module, the normally closed valve 210 and normally open valve 211 are in the ready-to-trigger state, and the core gas circuit maintains high-pressure oxygen reserve.

[0048] Negative pressure triggering and valve action: When the user inhales, the negative pressure generated in the respiratory tract is transmitted to the pressure sensor through the oxygen delivery tubing. After the sensor detects the negative pressure signal, it feeds back to the main control board within 0.3 seconds. The main control board immediately controls the normally open valve 211 to open, forming a high-flow-rate path, with a peak oxygen flow rate of up to 16L / min, quickly meeting the user's oxygen supply needs during inhalation; at the same time, it controls the normally closed valve 210 to open after a 0.1-second delay, assisting in stabilizing the airflow pressure and avoiding flow fluctuations. When the user exhales, the negative pressure in the pipeline disappears, the pressure sensor feeds back a positive pressure signal, and the main control board controls the normally closed valve 210 and normally open valve 211 to close simultaneously, cutting off the oxygen supply path on both sides at the same time to avoid oxygen waste and "human-machine conflict".

[0049] Mode adaptation scenarios: Suitable for patients with mild to moderate hypoxia with stable respiratory rhythm, such as patients with chronic obstructive pulmonary disease undergoing oxygen therapy during daily activities. It can reduce oxygen loss during exhalation, improve the efficiency of oxygen therapy, and at the same time reduce device power consumption, which is significantly lower than that of continuous flow mode.

[0050] (III) Mode Switching Mechanism The two modes are independently controlled by the main control board and support real-time switching without airflow interruption during the switching process. When switching from continuous flow mode to trigger mode, the main control board first closes the throttle valve, and after a delay of 0.5 seconds, activates the pressure sensor and valve control module to ensure a stable transition of gas pressure. When switching from trigger mode to continuous flow mode, the main control board first de-energizes the normally closed valve 210 and normally open valve 211, activates the throttle valve and adjusts it to the set opening, and completes the switching after the flow stabilizes.

[0051] (iv) Working mechanism of heat dissipation and noise reduction system Cooling system: The heat generated by the compressor 213 during operation is dissipated through the heat dissipation fins. The turbine fan 212 runs at a speed of 1500-2000 rpm, drawing in cool air from the intake and exhaust silencer box 21 and blowing it onto the heat dissipation fins through the air outlet. The hot airflow formed after carrying away the heat is discharged through the heat dissipation holes of the pump core silencer box 22. The compressor temperature is monitored in real time by a temperature sensor. When the temperature exceeds 60℃, the main control board controls the fan speed to increase to 2500 rpm to ensure that the compressor operating temperature is stable within the range of 40-60℃, avoiding overheating that could affect operational stability.

[0052] The working principle of the overall technical solution of this invention: I. Internal Dual-Channel Basic Gas Flow and Treatment Principle The core operation of this oxygen generator relies on an internal dual-channel architecture. Its basic gas flow and processing flow runs through two working modes: 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 oxygen separation is completed in molecular sieve tank 24, the high-concentration oxygen is stabilized by pressure regulating valve 25, and then the flow is controlled by normally closed valve 210 and normally open valve 211. The specific process is as follows: Molecular sieve oxygen generation and oxygen extraction: The molecular sieve barrel 24 separates high-concentration oxygen by adsorbing nitrogen and releasing oxygen through the molecular sieve. The separated high-concentration oxygen flows out from the outlet of the molecular sieve barrel 24 and is sealed to the inlet of the pressure regulating valve 25 through a sealed pipeline, forming an oxygen outlet path of "molecular sieve barrel 24 → pressure regulating valve 25".

[0053] The pressure stabilizing function of the pressure regulating valve: The pressure regulating valve 25 regulates the pressure of the incoming high-concentration oxygen, stabilizing the oxygen pressure within a safe range suitable for the patient, avoiding excessive pressure that could damage the respiratory tract and excessive pressure that could affect the oxygen supply efficiency, and ensuring that the oxygen pressure delivered afterward is constant. The regulated oxygen flows out from the outlet of the pressure regulating valve 25 and enters the first connecting pipe 26, which is sealed to the first interface of the three-way valve 27, in preparation for subsequent valve control.

[0054] Logic for controlling the flow of normally closed and normally open valves: The regulated oxygen is delivered to the three-way valve 27 via the first connecting pipe 26. The three-way valve 27 is then switched between normally closed valve 210 and normally open valve 211 via its interface. The second port of the three-way valve 27 is sealed to the normally closed valve 210 via the second connecting pipe 28. The normally closed valve 210 is in the closed state by default and is only opened when powered on in the trigger mode to assist in adjusting the stability of oxygen flow. The third port of the three-way valve 27 is fixedly connected to the air inlet of the normally open valve 211 through the third connecting pipe 29. The normally open valve 211 is in the open / closed state by default. In the trigger mode, it can open when the power is cut off to form a large flow channel, instantly increasing the oxygen flow rate to a peak value of 16L / min as detected by the third party. Both control methods, through alternating power-on or on-demand switching, jointly regulate the opening and closing of the oxygen passage and the flow rate, ultimately enabling oxygen to be delivered to the oxygen outlet through subsequent pipelines, thus achieving precise oxygen supply.

[0055] (a) Pathway operation under continuous flow mode Basic path startup External air is compressed and oxygen produced through 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”. High-concentration oxygen is discharged through molecular sieve barrel 24 to pressure regulating valve 25 and adjusted to a stable pressure.

[0056] Valve status and flow control: In this mode, normally closed valve 210 and normally open valve 211 remain de-energized and closed. The regulated oxygen enters the outlet passage through the preset straight channel of the three-way valve 27, directly into the outlet bend branch → straight interface 219, and then the flow rate is continuously adjustable from 1-5L / min by the throttle valve, and finally stable oxygen is output through the oxygen outlet.

[0057] (ii) Path operation in trigger mode Basic pathway preparation The oxygen generation core circuit continuously operates with air intake, compression, oxygen generation, and pressure regulation. The pressure regulating valve 25 outputs oxygen at a stable pressure, which is then delivered to the three-way valve 27 via the first connecting pipe 26, awaiting a negative pressure trigger signal.

[0058] Negative pressure triggering and valve action The negative pressure signal generated by the patient's inhalation is transmitted to the sensor, triggering the normally closed valve 210 and normally open valve 211 to be energized alternately: when the normally open valve 211 is de-energized, the valve opens to form a high-flow passage, and when the normally closed valve 210 is energized, the valve opens to assist in stabilizing the pressure, and oxygen is quickly delivered to the patient; during exhalation, the two valves close simultaneously to cut off the passage and avoid "patient-ventilator asynchrony".

[0059] Working principle of heat dissipation and noise reduction system: During the operation of the oxygen concentrator, the heat dissipation and noise reduction systems work simultaneously to ensure equipment stability: the intake and exhaust silencer box 21 and the pump core silencer box 22 are fixed together by connecting buckles 23. The turbine fan 212 is fixed inside the intake and exhaust silencer box 21 by the shell frame. The air outlet of the turbine fan 212 is connected to the flow port 221 opened at the top of the pump core silencer box 22. The flow port 221 and the intake and exhaust silencer box 21 are connected to form a noise reduction airflow channel, which can reduce the noise during the gas flow process. At the same time, the air outlet of the turbine fan 212 faces the heat dissipation fins of the compressor 213 inside the pump core silencer box 22. The air inlet of the turbine fan 212 is connected to the heat dissipation airflow 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 avoids the equipment from affecting the operational stability due to overheating.

[0060] 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.

[0061] 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 dual-mode oxygen generator with internal dual channels, characterized in that, The device includes an oxygen generator housing (1) and structural components (2) disposed inside the housing (1); the structural components (2) include 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-through 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) and the pressure regulating valve (25) and the three-way valve (27) form a gas processing passage. The oxygen generator has two external modes: continuous flow mode and trigger mode. The continuous flow mode is continuously adjustable from 1 to 5 L / min through throttling adjustment. The trigger mode is achieved by alternating power-on operation of normally closed valve (210) and normally open valve (211) in response to negative pressure signals. The two modes are independently switched through internal dual channels.

2. A dual-mode oxygen generator with internal dual channels as described in claim 1, characterized in that, 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) is provided with a flow port (221). A muffler (222) is installed on the top of the pump core muffler box (22). The exhaust muffler box (21) is fixed with a turbine fan (212) inside the 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 box (21) to form a noise reduction airflow channel.

3. A dual-mode oxygen generator with internal dual channels as described in claim 1, characterized in that, 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.

4. A dual-mode oxygen generator with internal dual channels as described in claim 1, characterized in that, 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).

5. A dual-mode oxygen generator with internal dual channels as described in claim 1, characterized in that, 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).

6. A dual-mode oxygen generator with internal dual channels as described in claim 1, characterized in that, The continuous flow mode achieves a continuously adjustable flow rate of 1-5 L / min through throttling adjustment. In this mode, the normally closed valve (210) and normally open valve (211) remain de-energized. The oxygen conduction path of the normally open valve (211) relies on the throttling valve to regulate the flow rate, avoiding the wear and tear of the solenoid valve caused by long-term energization. The trigger mode is achieved by alternating energization of the normally closed valve (210) and normally open valve (211) in response to the negative pressure signal generated by human inhalation. In this mode, the gas can be transported through the gas processing passage - trigger mode control passage - outlet passage, and the two modes can be switched independently through internal dual channels.

7. A dual-mode oxygen generator with internal dual channels as described in claim 1, characterized in that, 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 thread, forming a gas conduction passage between the molecular sieve barrel (24) and the three-way valve (27).

8. A dual-mode oxygen generator with internal dual channels as described in claim 1, characterized in that, The input end of the SNT025 component (220) is threadedly connected to the output end of the through interface (219), and a leak-proof gasket is provided at the connection between the SNT025 component (220) and the through interface (219).

9. A dual-mode oxygen generator with internal dual channels as described in claim 1, characterized in that, The two ends of the molecular sieve barrel (24) are respectively snapped and positioned with the inner walls of the inlet and outlet silencer box (21) and the pump core silencer box (22) by buckles. The air inlet end of the molecular sieve barrel (24) and the air inlet end of the pressure regulating valve (25) are sealed and connected by a rubber hose.

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