Oxygen generator

Abstract

This application relates to the field of gas separation technology, and provides an oxygen generator, including a chassis, a compressor assembly, and an oxygen generating assembly. The compressor assembly and the oxygen generating assembly are disposed within the chassis. The gas outlet of the compressor assembly is connected to the inlet of the oxygen generating assembly. The generator also includes: an external filter assembly; the chassis has an air inlet connecting the internal cavity of the chassis to the external environment; and an internal filter assembly fixed inside the chassis. The inlet of the internal filter assembly is connected to the internal cavity of the chassis, and the outlet of the internal filter assembly is connected to the gas inlet of the compressor assembly. Outside air enters the compressor after being initially intercepted by the external filter assembly and then finely filtered by the internal filter assembly. This effectively reduces dust erosion of the compressor and downstream oxygen generating assembly, extends component life, and ensures stable oxygen production.

Description

Technical Field

[0001] This application relates to the field of gas separation technology, and more particularly to an oxygen generator. Background Technology

[0002] With the increasing application of portable respiratory support equipment in engineering construction, mining operations, and confined space work, users have placed higher demands on the portability and environmental adaptability of oxygen generators. Especially in working environments with high dust concentrations, oxygen generators not only need to have stable and reliable gas separation capabilities, but also need to effectively cope with the corrosion of delicate internal components by airborne particles.

[0003] Portable oxygen generators in related technologies typically have only a single-layer filter structure at the air inlet of their casing. After the outside air passes through this filter structure to initially intercept particulate matter, it enters the compressor for compression. The compressed gas then passes through a molecular sieve tower for oxygen-nitrogen separation, and the separated oxygen-enriched gas is supplied to the user for inhalation.

[0004] However, in dusty environments, fine particulate matter in the air can easily penetrate the single-layer filter structure and enter the compressor. This dust contaminates the compressor cylinder and piston components, accelerating mechanical wear and reducing compression efficiency and lifespan. Furthermore, dust travels with the compressed gas into the molecular sieve tower, covering the surface of the molecular sieve particles and causing a continuous decline in the adsorption capacity and separation efficiency of the molecular sieve, ultimately affecting the oxygen production concentration and stability of the oxygen generation components. Additionally, dust adhering to the inner walls of the pipes can impede airflow and increase system energy consumption. Moreover, the single-layer filter structure has a high filtration load in dusty environments, making the filter element prone to saturation and clogging. Frequent filter replacements increase maintenance costs and downtime, severely limiting the reliability and economy of the oxygen concentrator in harsh environments. Summary of the Invention

[0005] This application provides an oxygen generator to solve the problem in the prior art where insufficient filtration in dusty environments leads to easy corrosion of internal compressor components by dust.

[0006] This application provides an oxygen concentrator, including a chassis, a compressor assembly, and an oxygen generating assembly. The compressor assembly and the oxygen generating assembly are disposed within the chassis. The gas outlet of the compressor assembly is connected to the inlet of the oxygen generating assembly. The device further includes: an external filter assembly, wherein the chassis has an air inlet connected to the internal cavity of the chassis and the external environment, and the external filter assembly is disposed at the air inlet; and an internal filter assembly, fixed inside the chassis, wherein the inlet of the internal filter assembly is connected to the internal cavity of the chassis, and the outlet of the internal filter assembly is connected to the gas inlet of the compressor assembly.

[0007] According to one embodiment of this application, the external filter assembly includes: an outer grid plate, detachably connected to the chassis and located outside the air inlet; an inner grid plate, fixedly connected to the chassis and located inside the air inlet; and a first filter element located between the outer grid plate and the inner grid plate.

[0008] According to one embodiment of this application, the chassis includes an outer shell and a base fixedly disposed inside the outer shell. The internal filter assembly includes: a filter box fixed to the base, the filter box having a filter groove and an air nozzle, the air nozzle communicating with the filter groove; a pressure cap detachably disposed in the filter box and located at the opening of the filter groove, the pressure cap having an air inlet; a second filter element disposed in the filter groove; and a connecting pipe, one end of the connecting pipe communicating with the air nozzle and the other end communicating with the gas inlet of the compressor assembly.

[0009] According to one embodiment of this application, it further includes: a power supply battery, a main compartment and a battery compartment are formed between the base and the outer shell, the compressor assembly and the oxygen generation assembly are disposed in the main compartment, the battery compartment has a first communication port, the first communication port is connected to the main compartment, the power supply battery is disposed in the battery compartment, a gas flow channel is formed between the power supply battery and the outer shell, one end of the gas flow channel is connected to the air inlet, and the other end extends to the first communication port.

[0010] According to one embodiment of this application, the battery compartment has a second connection port, which connects to one end of the gas flow channel opposite to the air inlet. At least two external filter components are provided, wherein a portion of the external filter components connects to the main compartment, and another portion connects to the second connection port. The oxygen generator further includes: an adjustment component disposed on the base for adjusting the opening degree of the first and second connection ports; a first temperature measuring unit disposed on the base for detecting the temperature inside the battery compartment; and a control unit electrically connected to the adjustment component and the first temperature measuring unit. The control unit is configured to: when the temperature inside the battery compartment is greater than a first threshold, control the adjustment component to decrease the opening degree of the first connection port and increase the opening degree of the second connection port; when the temperature inside the battery compartment is less than a second threshold, control the adjustment component to increase the opening degree of the first connection port and decrease the opening degree of the second connection port, wherein the second threshold is less than the first threshold.

[0011] According to one embodiment of this application, the adjustment assembly includes: an adjustment seat located inside the battery compartment, having an adjustment cavity and a first adjustment port, a second adjustment port, and an air outlet communicating with the adjustment cavity; the first adjustment port communicating with a first communication port, the second adjustment port communicating with a second communication port, and the air outlet communicating with one end of the gas flow channel away from the air inlet; a rotating cylinder rotatably disposed in the adjustment cavity, one end of the rotating cylinder being always connected to the air outlet, and the other end being provided with an end plate; the peripheral wall of the rotating cylinder being provided with a first through hole corresponding to the first adjustment port and a second through hole corresponding to the second adjustment port; and a rotating shaft passing through the adjustment seat, one end of the rotating shaft being fixed to the end plate. A fixed connection is provided, with the other end extending out from the adjustment seat and the battery compartment; a driving device is disposed outside the battery compartment and is connected to the rotating shaft for driving the rotating cylinder to rotate between a first angle and a second angle; wherein, when the rotating cylinder is located at the first angle, the first through hole and the first adjustment port are directly connected, and the cylinder wall of the rotating cylinder closes the second adjustment port; when the rotating cylinder is located at the second angle, the second through hole and the second adjustment port are directly connected, and the cylinder wall of the rotating cylinder closes the first adjustment port; when the rotating cylinder is located between the first angle and the second angle, the first through hole and the first adjustment port are partially connected, and the second through hole and the second adjustment port are partially connected.

[0012] According to one embodiment of this application, it further includes: a cooling fan disposed within the main compartment and above the compressor assembly, the cooling fan's airflow direction being downward; an exhaust control assembly, the outer casing having an exhaust port communicating with the main compartment and the external environment, the exhaust control assembly disposed within the outer casing and electrically connected to the control unit, for adjusting the opening degree of the exhaust port; a second temperature measuring unit, electrically connected to the control unit, for detecting the temperature within the main compartment; wherein, the control unit is further configured to: activate the cooling fan when the main compartment temperature exceeds a third threshold, and adjust the airflow accordingly. The exhaust control component increases the opening of the exhaust vent based on the difference between the main cabin temperature and the third threshold. When the main cabin temperature is lower than the fourth threshold, the cooling fan is turned off, and the exhaust control component decreases the opening of the exhaust vent based on the difference between the main cabin temperature and the fourth threshold. When the battery compartment temperature is lower than the second threshold and the main cabin temperature is lower than the fifth threshold, the control unit turns off the cooling fan and decreases the opening of the exhaust vent. Wherein, the second threshold is less than the fifth threshold, the fourth threshold is less than the fifth threshold, and the fifth threshold is less than the third threshold.

[0013] According to one embodiment of this application, an oxygen control component is also included. The oxygen control component includes a gas storage box, an oxygen control solenoid valve, a flow control unit, a micro-pressure sensor, an oxygen outlet nozzle, and a controller. The inlet of the gas storage box is connected to the oxygen outlet of the oxygen generating component, and the outlet of the gas storage box is connected to the inlet of the flow control unit through the oxygen control solenoid valve. The micro-pressure sensor and the oxygen outlet nozzle are connected in parallel to the outlet of the flow control unit. The controller is electrically connected to the micro-pressure sensor, the oxygen control solenoid valve, and the flow control unit, respectively. The controller is configured to control the on / off state of the oxygen control solenoid valve and / or the output flow of the flow control unit based on the pressure signal detected by the micro-pressure sensor.

[0014] According to one embodiment of this application, it also includes an oxygen inhalation assembly, which includes an oxygen inhalation tube and a sponge sleeve. One end of the oxygen inhalation tube is connected to the oxygen outlet nozzle, and the other end is provided with an oxygen outlet port. The sponge sleeve is fitted onto the oxygen outlet port.

[0015] According to one embodiment of this application, the oxygen generating assembly includes an oxygen generating solenoid valve, a first molecular sieve tower, and a second molecular sieve tower. The inlet of the first molecular sieve tower and the inlet of the second molecular sieve tower are connected to the gas outlet of the compressor assembly through the oxygen generating solenoid valve. The oxygen outlet of the first molecular sieve tower and the oxygen outlet of the second molecular sieve tower are both connected to the oxygen control solenoid valve.

[0016] The oxygen concentrator provided in this application features an external filter assembly at the air inlet of the casing and an internal filter assembly inside the casing, connected to the gas inlet of the compressor assembly. Before entering the compressor assembly, outside air flows sequentially through both the external and internal filter assemblies. The external filter assembly initially intercepts larger particles in the air, while the internal filter assembly further filters residual dust passing through the casing cavity. The clean air, purified by this dual filtration, then enters the compressor assembly, effectively reducing the possibility of dust entering the compressor assembly and preventing dust corrosion of the compressor assembly and downstream oxygen-generating components. This extends the service life of the compressor assembly and ensures the stability of oxygen production. Furthermore, because the internal filter assembly is fixed inside the casing and its inlet connects to the casing cavity, the suction negative pressure generated by the compressor assembly during operation ensures that outside air passes sequentially through the external filter assembly, the casing cavity, and the internal filter assembly before entering the compressor, guaranteeing the reliability of the filtered airflow path. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an oxygen generator according to an embodiment of this application;

[0019] Figure 2 This is an exploded view of an external filter assembly according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the internal structure of an oxygen generator according to an embodiment of this application;

[0021] Figure 4 This is an exploded view of an internal filter component according to an embodiment of this application;

[0022] Figure 5 This is a cross-sectional view of an adjustment component according to an embodiment of this application;

[0023] Figure 6 This is a longitudinal sectional view of an adjustment component according to an embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the overall structure of an oxygen generator according to another embodiment of this application;

[0025] Figure 8 This is a schematic diagram of the overall structure of an oxygen generator according to another embodiment of this application;

[0026] Figure 9 This is a partially enlarged view of an oxygen delivery assembly according to an embodiment of this application;

[0027] Figure label:

[0028] 100. Chassis; 110. Outer shell; 120. Base; 121. First connecting port; 122. Second connecting port; 123. Gas flow channel; 130. Air inlet; 140. Inner cavity; 141. Main compartment; 142. Battery compartment; 150. Exhaust vent;

[0029] 200. Compressor assembly; 210. Gas inlet;

[0030] 300. Oxygen generating assembly; 310. Oxygen generating solenoid valve; 320. First molecular sieve tower; 330. Second molecular sieve tower;

[0031] 400. External filter assembly; 410. External grid plate; 420. Internal grid plate; 430. First filter element;

[0032] 500. Internal filter assembly; 510. Filter box; 511. Filter tank; 512. Air nozzle; 520. Pressure cap; 521. Air inlet; 530. Second filter element;

[0033] 600, power supply battery;

[0034] 700, First Temperature Measurement Unit;

[0035] 800, Adjustment assembly; 810, Adjustment seat; 811, Adjustment chamber; 812, First adjustment port; 813, Second adjustment port; 814, Air outlet; 820, Rotating cylinder; 821, First through hole; 822, Second through hole; 830, Rotating shaft; 840, Drive device;

[0036] 900, Control Unit;

[0037] 1000, Cooling fan;

[0038] 1100. Exhaust control components;

[0039] 1300, Second temperature measuring unit;

[0040] 1410. Gas storage box; 1420. Oxygen control solenoid valve; 1430. Flow control unit; 1440. Micro-pressure sensor; 1450. Oxygen outlet; 1460. Controller;

[0041] 1500, Oxygen inhalation assembly; 1510, Oxygen inhalation tube; 1520, Oxygen outlet port; 1530, Sponge sleeve. Detailed Implementation

[0042] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0043] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "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 the embodiments of 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 the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0045] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] The following is combined Figures 1-9 This application describes an oxygen generator according to an embodiment.

[0048] Combination Figures 1 to 3 In some embodiments, the oxygen concentrator includes a casing 100, a compressor assembly 200, and an oxygen generating assembly 300. The compressor assembly 200 and the oxygen generating assembly 300 are disposed within the casing 100. The gas outlet of the compressor assembly 200 is connected to the inlet of the oxygen generating assembly 300. The casing 100 is provided with an air inlet 130, which connects the inner cavity 140 of the casing 100 to the external environment. The oxygen concentrator also includes an external filter assembly 400 and an internal filter assembly 500. The external filter assembly 400 is disposed at the air inlet 130. The internal filter assembly 500 is fixed inside the casing 100, with its inlet connected to the inner cavity 140 of the casing 100 and its outlet connected to the gas inlet 210 of the compressor assembly 200.

[0049] For example, the chassis 100 serves as a support and protective structure for the oxygen concentrator, with an internal installation space for accommodating and securing the compressor assembly 200, the oxygen generation assembly 300, and other functional components. The chassis 100 can be made of sheet metal using sheet metal forming technology, or it can be made of engineering plastic using injection molding technology. The outer wall of the chassis 100 isolates the internal components from the external environment, providing protection and noise reduction.

[0050] The compressor assembly 200 is used to compress air. It can be a miniature reciprocating piston compressor, which drives the piston to reciprocate in the cylinder through a crank-connecting rod mechanism to achieve air intake and compression. Alternatively, the compressor assembly 200 can be a scroll compressor, which forms a continuously changing compression chamber through the relative motion of the moving scroll and the stationary scroll to achieve continuous air compression.

[0051] The oxygen generator 300 is used to separate oxygen and nitrogen from compressed air to produce oxygen-enriched gas that can be inhaled by the human body.

[0052] An air inlet 130 penetrating the wall of the chassis 100 is provided on the chassis 100, through which air from the outside environment enters the inner cavity 140 of the chassis 100. An external filter assembly 400 is disposed at the air inlet 130 to perform preliminary filtration of the air entering the inner cavity 140 of the chassis 100, intercepting larger particles such as sand, dust clumps, or fibrous debris. An internal filter assembly 500 is fixed to the inside of the chassis 100, with its inlet communicating with the inner cavity 140 of the chassis 100, and its outlet (see reference)... Figure 3 The air nozzle 512 in the middle is connected to the air intake of the compressor assembly 200 through a pipe (the pipe is hidden in the figure).

[0053] When the compressor assembly 200 is working, the piston or rotor inside it generates a suction negative pressure. This negative pressure is transmitted through the inner filter assembly 500 to the inner cavity 140 of the casing 100, and then acts on the outer filter assembly 400. Under the drive of the negative pressure, the outside air actively flows through the outer filter assembly 400 into the inner cavity 140 of the casing 100, and then enters the compressor assembly 200 after being further filtered by the inner filter assembly 500.

[0054] A dual filtration structure is formed by setting up an external filter assembly 400 and an internal filter assembly 500. The external filter assembly 400 is responsible for intercepting larger particles, while the internal filter assembly 500 is responsible for filtering out fine dust that escapes, thereby effectively reducing the possibility of dust entering the compressor assembly 200. Dust is abrasive, and once it enters the compressor assembly 200, it will aggravate the wear between the piston rings and cylinder walls, as well as moving parts such as bearings, shortening the service life of the compressor assembly 200. At the same time, after the dust enters the downstream oxygen generating assembly 300 with the compressed gas, it will adhere to the surface of the molecular sieve particles, clogging the micropores of the molecular sieve, resulting in a decrease in the adsorption capacity of the molecular sieve, and consequently reducing the oxygen production concentration and output stability of the oxygen generating assembly 300.

[0055] The dual filtration structure in this embodiment can effectively avoid the above-mentioned problems. The inner filter assembly 500 is fixed inside the chassis 100 and its inlet is connected to the inner cavity 140 of the chassis 100. The air passage between the inner filter assembly 500 and the compressor assembly 200 is a closed path. The clean air filtered by the inner filter assembly 500 can directly enter the air intake of the compressor assembly 200. The clean air will not be contaminated again by the suspended dust in the inner cavity 140 of the chassis 100 during the transmission process.

[0056] In addition, after the compressor assembly 200 stops, the external filter assembly 400 and the internal filter assembly 500 still protect the inner cavity 140 of the chassis 100. Dust from the external environment will not flow back into the chassis 100 through the air inlet 130, thus ensuring the cleanliness of the inside of the chassis 100.

[0057] Combination Figure 2 In some embodiments, the external filter assembly 400 includes an outer grid plate 410, an inner grid plate 420, and a first filter element 430. The outer grid plate 410 is detachably connected to the housing 100 and is located outside the air inlet 130. The inner grid plate 420 is fixedly connected to the housing 100 and is located inside the air inlet 130. The first filter element 430 is located between the outer grid plate 410 and the inner grid plate 420.

[0058] For example, the outer grille 410 is a panel structure with multiple vent holes, located outside the air inlet 130 of the housing 100, i.e., the side exposed to the external environment. The outer grille 410 can prevent larger foreign objects such as branches and stones from entering the air inlet 130, and can also avoid causing excessive air intake resistance. The outer grille 410 is detachably connected to the housing 100, such as by a snap-fit ​​connection or a screw connection. This connection method allows the user to periodically remove the outer grille 410 to replace or clean the first filter element 430.

[0059] The inner grid plate 420 is located inside the air inlet 130, that is, on the side facing the inner cavity 140 of the chassis 100. The inner grid plate 420 is fixedly connected to the chassis 100, for example by integral molding or fasteners. The inner grid plate 420 provides inner support for the first filter element 430 to prevent the first filter element 430 from being recessed or displaced towards the inner cavity 140 of the chassis 100 under negative pressure.

[0060] The first filter element 430 is sandwiched between the outer grid plate 410 and the inner grid plate 420, and is fixed and limited by the outer grid plate 410 and the inner grid plate 420. The first filter element 430 may be made of non-woven filter material, foam sponge or pleated filter paper, etc.

[0061] Driven by negative pressure, outside air first passes through the vents of the outer grille 410. The outer grille 410 provides initial airflow rectification, ensuring even airflow distribution and blocking large debris such as branches and leaves. The air then flows through the first filter element 430, which intercepts and filters larger particles in the air. After being filtered by the first filter element 430, the air passes through the inner grille 420 and enters the inner cavity 140 of the chassis 100.

[0062] In this embodiment, by making the outer grid plate 410 a detachable structure, the user can open the outer grid plate 410 and remove the first filter element 430 for cleaning or replacement without the need for special tools, thus reducing maintenance difficulty. The fixed setting of the inner grid plate 420 ensures that even during the replacement of the first filter element 430, the inner grid plate 420 always maintains protection of the internal structure of the chassis 100, preventing external debris from falling directly into the inner cavity 140 of the chassis 100. Multiple layers of filter cotton can also be attached to the inner side of the outer grid plate 410. These multiple layers of filter cotton are located between the outer grid plate 410 and the first filter element 430, and are used to pre-filter the air before it enters the first filter element 430, intercepting large particles of dust and impurities in the air, reducing the filtration load on the first filter element 430, thereby extending the service life of the first filter element 430.

[0063] Combination Figure 4 and Figure 5 In some embodiments, the chassis 100 includes an outer shell 110 and a base 120 fixedly disposed inside the outer shell 110. The internal filter assembly 500 includes a filter box 510, a pressure cap 520, a second filter element 530, and a connecting pipe (not shown in the figure). The filter box 510 is fixed to the base 120 and is provided with a filter groove 511 and an air nozzle 512, the air nozzle 512 communicating with the filter groove 511. The pressure cap 520 is detachably disposed in the filter box 510 and is located at the opening of the filter groove 511, and the pressure cap 520 has an air inlet 521. The second filter element 530 is disposed in the filter groove 511 and is located between the air inlet 521 and the air nozzle 512. One end of the connecting pipe communicates with the air nozzle 512, and the other end communicates with the gas inlet 210 of the compressor assembly 200.

[0064] For example, the housing 110 forms the outer contour of the chassis 100, and the base 120 is fixed to the inner bottom or side wall of the housing 110. The base 120 can be fixedly connected to the housing 110 by screws or welding, and the base 120 provides a mounting base for the internal filter assembly 500.

[0065] The filter box 510 is made of plastic or metal and is fixed to the base 120 by screws or clips. Inside the filter box 510, a filter groove 511 is formed. The filter groove 511 is a concave structure with an open top, used to accommodate the second filter element 530. An air nozzle 512 is provided on the side of the filter groove 511 opposite to the groove opening, allowing filtered air to flow out of the filter groove 511. A cover 520 covers the groove opening of the filter groove 511. The cover 520 and the filter box 510 are detachably connected, for example, by snap-fit ​​or screws, to facilitate opening the cover 520 to remove and replace the second filter element 530. An air inlet 521 is provided on the cover 520. This air inlet 521 serves as the inlet of the internal filter assembly 500, allowing air from the inner cavity 140 of the housing 100 to enter the filter groove 511 through the air inlet 521. The second filter element 530 is disposed inside the filter tank 511, located in the airflow path between the air inlet 521 and the air nozzle 512. The second filter element 530 may adopt a composite structure of activated carbon filter layer, high-efficiency air filter material layer or non-woven fabric layer, and its filtration accuracy is higher than that of the first filter element 430. It is used to finely filter the fine dust that still remains in the air after the initial filtration by the external filter component 400.

[0066] Optionally, the second filter element 530 adopts a multi-layer composite structure, including a nylon mesh layer, an activated carbon layer, a polyurethane sponge layer, and a non-woven fabric layer, wherein the nylon mesh layer, activated carbon layer, polyurethane sponge layer, and non-woven fabric layer are stacked sequentially along the airflow direction. Outside air passes through the nylon mesh layer, activated carbon layer, polyurethane sponge layer, and non-woven fabric layer sequentially under negative pressure. The nylon mesh layer, as the first filtration layer, is used to intercept larger particles in the air; the activated carbon layer adsorbs harmful gases and odors in the air; the polyurethane sponge layer has high porosity and is used to intercept medium-sized dust particles; the non-woven fabric layer, as the final filtration layer, has fine fibers and is used to intercept submicron-sized fine dust. The pore size of the nylon mesh layer, activated carbon layer, polyurethane sponge layer, and non-woven fabric layer decreases sequentially. This progressive filtration structure can classify and intercept particles of different sizes, preventing all particles from accumulating on the same filtration layer, thereby extending the overall service life of the second filter element 530.

[0067] Optionally, a rubber ring is provided inside the filter groove 511 of the filter box 510, and the rubber ring is fitted against the groove wall of the filter groove 511. After the cover 520 is inserted into the filter groove 511, the outer peripheral wall of the cover 520 and the inner wall of the rubber ring are interference-fitted, and the rubber ring undergoes elastic deformation, clamping and fixing the cover 520 in the filter groove 511. The interference fit of the rubber ring achieves the positioning of the cover 520. The cover 520 presses the second filter element 530 tightly into the filter groove 511. When it is necessary to replace the second filter element 530, the user only needs to overcome the elastic clamping force of the rubber ring to open the cover 520, and the second filter element 530 can be removed from the filter groove 511 without the need for special tools, making the operation simple and quick.

[0068] Optionally, a limiting groove is provided on the wall of the filter tank 511, and a corresponding limiting protrusion is provided on the outer peripheral wall of the pressure cap 520. When the pressure cap 520 is installed, the limiting protrusion is embedded in the limiting groove, which serves to prevent fooling and guide, ensuring that the pressure cap 520 is installed into the filter tank 511 in the correct direction. Furthermore, a snap-fit ​​structure can be provided between the pressure cap 520 and the filter box 510, allowing the user to quickly open and close the pressure cap 520 by pressing the snap-fit, facilitating daily maintenance and replacement of the filter element.

[0069] When the compressor assembly 200 operates, the resulting negative pressure is transmitted to the air nozzle 512, creating a negative pressure environment within the filter tank 511. Air in the inner cavity 140 of the housing 100 is drawn into the filter tank 511 through the air inlet 521 of the pressure cap 520 under atmospheric pressure, and passes through the second filter element 530. The clean air filtered by the second filter element 530 flows out of the filter tank 511 through the air nozzle 512 and enters one end of the connecting pipe. The other end of the connecting pipe is connected to the air intake of the compressor assembly 200, allowing clean air to be directly delivered to the air intake of the compressor assembly 200 via the connecting pipe.

[0070] The connecting pipe can be made of rubber hose or corrugated pipe, which has a certain degree of flexibility and can absorb the vibration generated when the compressor assembly 200 is working, so as to prevent the vibration from being transmitted to the filter box 510 and causing the connection to loosen.

[0071] The filter box 510 is fixed to the base 120, ensuring a stable relative position between the inner filter assembly 500 and the chassis 100, preventing the connecting pipe from loosening or falling off due to vibration. The removable design of the cover 520 allows users to periodically open the cover 520 to inspect or replace the second filter element 530, ensuring continuous filtration efficiency. The second filter element 530 is positioned between the air inlet 521 and the air nozzle 512, ensuring that all air entering the filter chamber 511 must pass through the second filter element 530 before reaching the air nozzle 512. There is no bypass of unfiltered airflow, thus guaranteeing the cleanliness of the air entering the compressor assembly 200.

[0072] Combination Figure 5 and Figure 6 In some embodiments, the oxygen generator also includes a power supply battery 600. A main compartment 141 and a battery compartment 142 are formed between the base 120 and the outer casing 110. A compressor assembly 200 and an oxygen generating assembly 300 are disposed within the main compartment 141. The battery compartment 142 has a first connection port 121, which connects to the main compartment 141. The power supply battery 600 is disposed within the battery compartment 142. A gas flow channel 123 is formed between the power supply battery 600 and the outer casing 110, with one end of the gas flow channel 123 connected to an air inlet 521 and the other end extending to the first connection port 121.

[0073] For example, after the base 120 is fixed to the inside of the outer casing 110, the base 120 and the inner wall of the outer casing 110 together enclose two independent compartments, namely the main compartment 141 and the battery compartment 142. The main compartment 141 provides installation space for the compressor assembly 200 and the oxygen generation assembly 300, etc., while the battery compartment 142 provides installation space for the power supply battery 600 and the internal filter assembly 500. The power supply battery 600 is used to provide power to various electrical components in the oxygen generator, such as the drive motor, control unit 900, and various solenoid valves in the compressor assembly 200. The power supply battery 600 can be a rechargeable lithium-ion battery pack or a nickel-metal hydride battery pack. The battery compartment 142 has a first connecting port 121, which connects the battery compartment 142 and the main compartment 141, allowing gas to flow between the battery compartment 142 and the main compartment 141. After the power supply battery 600 is installed in the battery compartment 142, there is a gap between the outer surface of the power supply battery 600 and the inner wall of the outer casing 110, which forms a gas flow channel 123. One end of the gas flow channel 123 is connected to the air inlet 521 of the inner filter assembly 500, and the other end of the gas flow channel 123 extends to the first connection port 121.

[0074] When the compressor assembly 200 operates, the suction negative pressure is transferred to the filter tank 511 via the connecting pipe and the air nozzle 512, and then to the gas flow channel 123 via the air inlet 521 of the pressure cap 520. This causes air in the main compartment 141 to be drawn into the gas flow channel 123 through the first connecting port 121, and flows along the gas flow channel 123 to the air inlet 521, ultimately entering the inner filter assembly 500. During this process, the air in the battery compartment 142, as it flows over the surface of the power supply battery 600, can regulate the temperature of the power supply battery 600. For example, it can carry away the heat generated by the power supply battery 600 during operation, providing air cooling; or, in low-temperature environments, it can utilize the heat generated by the compressor in the main compartment 141 to heat the power supply battery 600, ensuring that the power supply battery 600 operates at a suitable temperature.

[0075] This embodiment utilizes the suction negative pressure of the compressor assembly 200 to drive airflow across the surface of the power supply battery 600, thereby achieving temperature regulation of the power supply battery 600. This eliminates the need for additional cooling fans or heating wires, reducing overall energy consumption and noise. Placing the power supply battery 600 in a separate battery compartment 142 facilitates individual temperature regulation. This avoids heat buildup caused by direct proximity between the power supply battery 600 and the compressor assembly 200 and oxygen generation assembly 300, and also facilitates the efficient recovery and utilization of heat generated by the compressor assembly 200 and other equipment.

[0076] In some embodiments, the battery compartment 142 has a second connection port 122, which connects to one end of the gas flow channel 123 opposite to the air inlet 521. At least two external filter assemblies 400 are provided, with one portion of the external filter assembly 400 connecting to the main compartment 141 and the other portion connecting to the second connection port 122. The oxygen generator also includes an adjustment assembly 800, a first temperature measuring unit 700, and a control unit 900. The adjustment assembly 800 is disposed on the base 120 and is used to adjust the opening degree of the first connection port 121 and the second connection port 122. The first temperature measuring unit 700 is disposed on the base 120 and is used to detect the temperature inside the battery compartment 142. The control unit 900 is electrically connected to the adjustment assembly 800 and the first temperature measuring unit 700. The control unit 900 is configured to: when the temperature inside the battery compartment 142 is greater than a first threshold, control the adjustment assembly 800 to decrease the opening degree of the first connection port 121 and increase the opening degree of the second connection port 122. When the temperature inside the battery compartment 142 is lower than the second threshold, the control adjustment component 800 increases the opening of the first connection port 121 and decreases the opening of the second connection port 122, wherein the second threshold is lower than the first threshold.

[0077] For example, the battery compartment 142 is also provided with a second connection port 122, which connects the battery compartment 142 to the external environment. There are at least two external filter components 400. One part of the external filter components 400 is installed at the air inlet 130 corresponding to the main compartment 141, and the filtered air directly enters the main compartment 141. The other part of the external filter components 400 is installed at the air inlet 130 corresponding to the battery compartment 142, and the filtered air enters the battery compartment 142 through the second connection port 122. The second connection port 122 connects to the end of the gas flow channel 123 opposite to the air inlet 521, that is, the second connection port 122 is located at the upstream end of the gas flow channel 123.

[0078] An adjustment component 800 is mounted on the base 120 and is used to adjust the opening area of ​​the first connecting port 121 and the opening area of ​​the second connecting port 122, thereby controlling the gas flow between the battery compartment 142 and the main compartment 141 and the gas flow between the battery compartment 142 and the external environment.

[0079] The first temperature measuring unit 700 is installed inside the battery compartment 142 and is used to detect the temperature inside the battery compartment 142 in real time. The first temperature measuring unit 700 can be a thermocouple or a thermistor temperature sensor, which converts the detected temperature into an electrical signal and transmits it to the control unit 900.

[0080] The control unit 900 is electrically connected to the regulating component 800 and the first temperature measuring unit 700 respectively. The control unit 900 receives the temperature signal fed back by the first temperature measuring unit 700 and sends a control command to the regulating component 800 according to the temperature signal.

[0081] When the temperature inside the battery compartment 142 rises and exceeds the first threshold, it indicates that the power supply battery 600 is operating under high load or the ambient temperature is high, requiring enhanced cooling. At this time, the control unit 900 controls the regulating component 800 to decrease the opening of the first connection port 121 while simultaneously increasing the opening of the second connection port 122. This allows more air to enter the battery compartment 142 from the outside environment after being filtered by the external filter component 400 and passing through the second connection port 122. The air then flows over the surface of the power supply battery 600 and enters the gas flow channel 123, ultimately reaching the internal filter component 500. Because the introduced air is cooler ambient air, its cooling effect on the power supply battery 600 is superior to the scheme of recirculating the hot air inside the main compartment 141, thereby improving heat dissipation efficiency. When the temperature inside the battery compartment 142 drops below the second threshold, it indicates that the temperature of the power supply battery 600 is low and does not require excessive cooling. At this time, the control unit 900 controls the regulating component 800 to increase the opening of the first connection port 121 while decreasing the opening of the second connection port 122. This allows more air to enter the battery compartment 142 from the main compartment 141 through the first connection port 121 when the compressor component 200 draws in air. After flowing over the surface of the power supply battery 600, the air enters the gas flow channel 123. Since the air inside the main compartment 141 has been heated by the heat dissipation process of the compressor component 200 and the oxygen generation component 300, the higher air temperature helps maintain the temperature of the battery compartment 142 within a suitable operating range, preventing the power supply battery 600 from experiencing increased internal resistance and decreased discharge capacity due to excessively low temperature.

[0082] By setting the first and second thresholds, the temperature of the battery compartment 142 is controlled within a certain range, ensuring that the power supply battery 600 always operates within a suitable temperature range. This avoids both the damage to battery life caused by high temperatures and the adverse effects of low temperatures on battery discharge performance.

[0083] In some embodiments, the adjustment assembly 800 includes an adjustment seat 810, a rotating cylinder 820, a rotating shaft 830, and a drive device 840. The adjustment seat 810 is located within the battery compartment 142 and has an adjustment cavity 811 and a first adjustment port 812, a second adjustment port 813, and an air outlet 814 communicating with the adjustment cavity 811. The first adjustment port 812 communicates with a first connecting port 121, the second adjustment port 813 communicates with a second connecting port 122, and the air outlet 814 communicates with one end of the gas flow channel 123 opposite to the air inlet 521. The rotating cylinder 820 is rotatably disposed in the adjustment cavity 811. One end of the rotating cylinder 820 is always in communication with the air outlet 814, and the other end is provided with an end plate. The peripheral wall of the rotating cylinder 820 is provided with a first through hole 821 corresponding to the first adjustment port 812 and a second through hole 822 corresponding to the second adjustment port 813. A rotating shaft 830 passes through an adjusting seat 810. One end of the rotating shaft 830 is fixedly connected to an end plate, and the other end extends out of the adjusting seat 810 and the battery compartment 142. A driving device 840 is located outside the battery compartment 142 and is connected to the rotating shaft 830 for driving the rotating cylinder 820 to rotate between a first angle and a second angle. When the rotating cylinder 820 is at the first angle, the first through hole 821 and the first adjusting port 812 are directly connected, and the cylinder wall of the rotating cylinder 820 closes the second adjusting port 813. When the rotating cylinder 820 is at the second angle, the second through hole 822 and the second adjusting port 813 are directly connected, and the cylinder wall of the rotating cylinder 820 closes the first adjusting port 812. When the rotating cylinder 820 is between the first angle and the second angle, the first through hole 821 and the first adjusting port 812 are partially connected, and the second through hole 822 and the second adjusting port 813 are partially connected.

[0084] Exemplarily, the regulating seat 810 is a shell structure with an internal cavity, which is fixed inside the battery compartment 142. The cavity inside the regulating seat 810 is the regulating cavity 811. The regulating seat 810 has a first regulating port 812, a second regulating port 813, and an air outlet 814, all three openings being in communication with the regulating cavity 811. The first regulating port 812 is connected to the first connecting port 121 of the battery compartment 142, allowing the regulating cavity 811 to communicate with the main compartment 141 through the first connecting port 121. The second regulating port 813 is connected to the second connecting port 122 of the battery compartment 142, allowing the regulating cavity 811 to communicate with the external environment through the second connecting port 122. The air outlet 814 is connected to the end of the gas flow channel 123 opposite to the air inlet 521, allowing air in the regulating cavity 811 to enter the gas flow channel 123 through the air outlet 814.

[0085] The rotating cylinder 820 has a cylindrical structure, with its outer diameter being less than or equal to the inner diameter of the adjusting cavity 811. The rotating cylinder 820 is rotatably mounted inside the adjusting cavity 811. One axial end of the rotating cylinder 820 is an open end, which is always in communication with the air outlet 814. Regardless of the angle to which the rotating cylinder 820 rotates, the air outlet 814 remains connected to the internal space of the rotating cylinder 820. The other axial end of the rotating cylinder 820 is a closed end, equipped with an end plate that closes this end. A first through hole 821 and a second through hole 822 are formed on the peripheral wall of the rotating cylinder 820. The position of the first through hole 821 corresponds to the position of the first adjusting port 812, and the position of the second through hole 822 corresponds to the position of the second adjusting port 813.

[0086] One end of the rotating shaft 830 passes through the wall of the adjusting seat 810 and extends into the adjusting cavity 811, where it is fixedly connected to the end plate of the rotating cylinder 820. The other end of the rotating shaft 830 extends out of the adjusting seat 810 and further out of the battery compartment 142, extending into the main compartment 141. The drive device 840 is located outside the battery compartment 142, specifically inside the main compartment 141. Its output end is connected to the rotating shaft 830. The drive device 840 drives the rotating cylinder 820 to rotate around its own axis within the adjusting cavity 811 via the rotating shaft 830, with the rotation range between a first angle and a second angle. The drive device 840 can be a stepper motor or a servo motor. A stepper motor can precisely control the rotation angle, facilitating stepless adjustment of the opening.

[0087] When the control unit 900 controls the rotating cylinder 820 to rotate to the first angle, the first through hole 821 is directly aligned with the first adjustment port 812, so that the first adjustment port 812 is connected to the inside of the rotating cylinder 820. At the same time, the cylinder wall of the rotating cylinder 820 completely seals the second adjustment port 813. At this time, the suction negative pressure generated by the compressor assembly 200 causes air to flow from the chamber through the first connecting port 121 and the first adjustment port 812 into the inside of the rotating cylinder 820, and then through the air outlet 814 into the gas flow channel 123, and then into the inner filter assembly 500. When the rotating cylinder 820 rotates to the second angle, the second through hole 822 is directly aligned with and connected to the second regulating port 813, allowing the second regulating port 813 to communicate with the interior of the rotating cylinder 820. Simultaneously, the cylinder wall of the rotating cylinder 820 completely seals the first regulating port 812. At this time, air flows from the external environment to the external filter assembly 400, passes through the second connecting port 122 and the second regulating port 813, and then enters the rotating cylinder 820 through the air outlet 814 into the gas flow channel 123, and finally into the internal filter assembly 500. When the rotating cylinder 820 is located at any intermediate position between the first and second angles, the first through hole 821 is partially connected to the first regulating port 812, and the second through hole 822 is partially connected to the second regulating port 813. That is, both the first regulating port 812 and the second regulating port 813 are in a semi-open state. Air simultaneously enters the rotating cylinder 820 from both the main cabin 141 and the external environment, and the air intake ratio of the two sources continuously changes with the rotation angle of the rotating cylinder 820.

[0088] By adjusting the angle of the rotating cylinder 820, continuous stepless adjustment of the opening degree of the first connecting port 121 and the second connecting port 122 is achieved, allowing the air intake source of the battery compartment 142 to be distributed as needed between the air in the main compartment 141 and the ambient air. The drive device 840 is located on the outside of the battery compartment 142, preventing the heat generated by the drive device 840 from directly accumulating inside the battery compartment 142, which helps to maintain a stable thermal environment inside the battery compartment 142. A seal can be provided at the point where the rotating shaft 830 exits the battery compartment 142 to prevent air from leaking out of the battery compartment 142 from the point where the rotating shaft 830 exits, ensuring the airflow path is sealed.

[0089] Combination Figure 3 and Figure 7In some embodiments, the oxygen generator further includes a cooling fan 1000, an exhaust control assembly 1100, and a second temperature measuring unit 1300. The cooling fan 1000 is located inside the main compartment 141 and above the compressor assembly 200, with its exhaust direction downwards. The exhaust control assembly 1100 is located on the outer casing 110 and is electrically connected to the control unit 900, used to adjust the opening of the exhaust port 150. The outer casing 110 has an exhaust port 150 connecting the main compartment 141 to the external environment. The second temperature measuring unit 1300 is electrically connected to the control unit 900 and used to detect the temperature inside the main compartment 141. The control unit 900 is further configured to: activate the cooling fan 1000 when the temperature of the main compartment 141 is higher than a third threshold, and control the exhaust control assembly 1100 to increase the opening of the exhaust port 150 based on the difference between the temperature of the main compartment 141 and the third threshold. When the temperature of the main compartment 141 is below the fourth threshold, the cooling fan 1000 is turned off, and the exhaust control component 1100 is controlled to reduce the opening of the exhaust vent 150 based on the difference between the temperature of the main compartment 141 and the fourth threshold. When the temperature of the battery compartment 142 is below the second threshold and the temperature of the main compartment 141 is below the fifth threshold, the control unit 900 turns off the cooling fan 1000 and reduces the opening of the exhaust vent 150. The second threshold is less than the fifth threshold, the fourth threshold is less than the fifth threshold, and the fifth threshold is less than the third threshold.

[0090] For example, a cooling fan 1000 is installed inside the main compartment 141, above the compressor assembly 200, with its airflow direction downwards, blowing air towards the compressor assembly 200. The cooling fan 1000 can be an axial fan or a centrifugal fan. After the cooling fan 1000 starts, the downward airflow directly impacts the surface of the compressor assembly 200, dissipating the heat generated during the operation of the compressor assembly 200 and accelerating the convective heat transfer of the air around the compressor assembly 200. An exhaust port 150 is opened on the outer casing 110, connecting the interior space of the main compartment 141 to the external environment, allowing hot air inside the main compartment 141 to be discharged to the external environment through the exhaust port 150. To prevent debris from entering the main compartment 141 through the exhaust port 150, a third filter can be installed in the exhaust port 150. The third filter can have the same or similar structure as the first or second filter. An exhaust control assembly 1100 is located at the exhaust port 150 and is electrically connected to the control unit 900. Under the control of the control unit 900, it adjusts the opening area of ​​the exhaust port 150, thereby controlling the flow rate of hot air discharged from the main cabin 141. The exhaust control assembly 1100 can be an electric valve or a sliding baffle structure. A second temperature measuring unit 1300 is located inside the main cabin 141 and is used to detect the air temperature inside the main cabin 141 and feed the temperature signal back to the control unit 900. The second temperature measuring unit 1300 can be a thermocouple or a thermistor temperature sensor. The control unit 900 monitors the temperature of the main cabin 141 in real time and executes corresponding heat dissipation control strategies.

[0091] When the second temperature sensing unit 1300 detects that the temperature of the main cabin 141 has risen and exceeded the third threshold, it indicates that the temperature inside the main cabin 141 is too high and active cooling measures need to be implemented. The control unit 900 starts the cooling fan 1000 to operate, and the cooling fan 1000 blows air downwards to force-cool the compressor assembly 200. At the same time, the control unit 900 calculates the difference between the current temperature of the main cabin 141 and the third threshold. The larger the difference, the more urgent the cooling demand. The control unit 900 controls the exhaust control assembly 1100 to increase the opening of the exhaust port 150 as much as possible, allowing more hot air to be discharged from the main cabin 141 through the exhaust port 150, accelerating the replacement of hot air inside the main cabin 141 with the cool air of the outside environment. When the second temperature sensing unit 1300 detects that the temperature of the main cabin 141 has dropped and fallen below the fourth threshold, it indicates that the temperature inside the main cabin 141 has dropped to a reasonable range and no further active cooling is needed. Control unit 900 shuts down cooling fan 1000 to save power and reduce noise. At the same time, control unit 900 calculates the difference between the current temperature of main cabin 141 and the fourth threshold. The larger the difference, the lower the temperature. Control unit 900 controls exhaust control component 1100 to reduce the opening of exhaust port 150 as much as possible to reduce the heat exchange between the air in main cabin 141 and the outside environment, so as to avoid the internal temperature of main cabin 141 being too low in winter or low temperature environment, which would affect the normal operation of oxygen generation component 300.

[0092] When the temperature of battery compartment 142 is below the second threshold and the temperature of main compartment 141 is below the fifth threshold, it indicates that both battery compartment 142 and main compartment 141 are in a low-temperature state, and the oxygen generator is in a low-temperature operating condition. Control unit 900 shuts off cooling fan 1000 and reduces the opening of exhaust vent 150 to reduce heat loss from the main compartment 141, allowing the heat generated by compressor assembly 200 and oxygen generation assembly 300 to accumulate within the main compartment 141, helping to raise the temperature of both main compartment 141 and battery compartment 142 to a suitable operating temperature. In terms of the temperature threshold hierarchy, the second threshold is lower than the fifth threshold, the fourth threshold is lower than the fifth threshold, and the fifth threshold is lower than the third threshold. This hierarchy ensures that the control logic in different temperature ranges does not conflict, achieving a smooth switch between low-temperature protection and high-temperature heat dissipation. This embodiment, while meeting the heat dissipation requirements of main compartment 141, can ensure the stability of the thermal energy provided to battery compartment 142 in low-temperature environments, thereby enabling the oxygen generator to adapt to a wider range of ambient temperatures.

[0093] It should be noted that the first, second, third, fourth, and fifth thresholds mentioned above can be determined based on the battery type and compressor type, or can be calibrated experimentally. For example, the first threshold is 5°C, the second threshold is 45°C, the third threshold is 50°C, the fourth threshold is 20°C, and the fifth threshold is 10°C.

[0094] Combination Figure 1 , Figure 3 and Figure 8 In some embodiments, the oxygen generator further includes an oxygen control component. The oxygen control component includes a gas storage box 1410, an oxygen control solenoid valve 1420, a flow control unit 1430, a micro-pressure sensor 1440, an oxygen outlet 1450, and a controller 1460. The inlet of the gas storage box 1410 is connected to the oxygen outlet of the oxygen generator 300. The outlet of the gas storage box 1410 is connected to the inlet of the flow control unit 1430 via the oxygen control solenoid valve 1420. The micro-pressure sensor 1440 and the oxygen outlet 1450 are connected in parallel to the outlet of the flow control unit 1430. The controller 1460 is electrically connected to the micro-pressure sensor 1440, the oxygen control solenoid valve 1420, and the flow control unit 1430, respectively. The controller 1460 is configured to control the on / off state of the oxygen control solenoid valve 1420 and the output flow of the flow control unit 1430 based on the pressure signal detected by the micro-pressure sensor 1440.

[0095] For example, the oxygen control component is used to store and release the oxygen-enriched gas produced by the oxygen generator 300 on demand, realizing intelligent control of the user's oxygen inhalation process. In environments with high dust concentrations, such as construction sites or enclosed spaces, users typically need to wear protective masks or maintain a sealed environment for oxygen inhalation. The utilization rate of oxygen directly affects operational safety and economy. The gas storage box 1410 is a container with an internal buffer volume. Its inlet is connected to the oxygen outlet of the oxygen generator 300 through a pipeline. The oxygen-enriched gas produced by the oxygen generator 300 first enters the gas storage box 1410 for temporary storage. The gas storage box 1410 plays a buffering and pressure stabilizing role. On the one hand, it avoids the problem of unstable oxygen supply caused by small fluctuations in the oxygen flow rate of the oxygen generator 300. On the other hand, it can release a sufficient flow of oxygen the moment the oxygen control solenoid valve 1420 opens, meeting the user's demand for a larger flow rate when taking deep breaths.

[0096] The outlet of the gas storage box 1410 is connected to the inlet of the oxygen control solenoid valve 1420 via a pipeline, and the outlet of the oxygen control solenoid valve 1420 is connected to the inlet of the flow control unit 1430. The oxygen control solenoid valve 1420 is an electrically controlled on / off valve, which switches between open and closed states according to the instructions of the controller 1460. When the oxygen control solenoid valve 1420 is open, the oxygen-enriched gas in the gas storage box 1410 flows to the flow control unit 1430 through the oxygen control solenoid valve 1420; when the oxygen control solenoid valve 1420 is closed, the oxygen-enriched gas in the gas storage box 1410 is intercepted.

[0097] The flow control unit 1430 is an electronically controlled flow regulator used to precisely regulate the oxygen flow through the oxygen control solenoid valve 1420. The flow control unit 1430 can be an electronic expansion valve or a proportional control valve. The flow control unit 1430 has one inlet and two outlets. The first outlet is connected to the micro-pressure sensor 1440, and the second outlet is connected to the oxygen outlet 1450. The micro-pressure sensor 1440 and the oxygen outlet 1450 are connected in parallel to the outlet of the flow control unit 1430. That is, the gas path branch containing the micro-pressure sensor 1440 and the gas path branch containing the oxygen outlet 1450 are interconnected inside the flow control unit 1430 or at its outlet, and both are at the same pressure node. Therefore, the pressure value detected by the micro-pressure sensor 1440 is consistent with the pressure value at the oxygen outlet 1450. Since there is almost no airflow within the sensor branch, this parallel structure will not cause any shunting loss to the oxygen output of the oxygen outlet 1450, while being able to sensitively detect minute pressure fluctuations at the oxygen outlet 1450 caused by the user's inhalation and exhalation.

[0098] The pressure signal output terminal of the micro-pressure sensor 1440 is electrically connected to the signal input terminal of the controller 1460, transmitting the real-time detected pressure signal to the controller 1460. The control terminal of the oxygen control solenoid valve 1420 is electrically connected to the control signal output terminal of the controller 1460, and the control terminal of the flow control unit 1430 is also electrically connected to the control signal output terminal of the controller 1460. The controller 1460 judges and executes corresponding control actions based on the pressure signal fed back by the micro-pressure sensor 1440.

[0099] When a user inhales, a negative pressure is generated in the user's respiratory tract. This negative pressure is transmitted to the oxygen outlet 1450, causing a decrease in the tubing pressure near the outlet 1450. The micro-pressure sensor 1440 detects this pressure decrease signal and sends it to the controller 1460. The controller 1460 determines that the user is inhaling and immediately controls the oxygen control solenoid valve 1420 to open. Simultaneously, it controls the flow control unit 1430 to output oxygen according to a preset flow rate. The oxygen in the gas storage box 1410 flows through the oxygen control solenoid valve 1420 and the flow control unit 1430 to the oxygen outlet 1450 for the user to inhale. During inhalation, the micro-pressure sensor 1440 continuously monitors the tubing pressure, and the controller 1460 adjusts the output flow rate of the flow control unit 1430 in real time based on changes in the pressure signal to ensure a continuous oxygen output throughout the entire inhalation phase.

[0100] When the user switches to exhalation mode, the pressure in the user's respiratory tract increases and is transmitted to the oxygen outlet 1450. The micro-pressure sensor 1440 detects the pressure increase signal, and the controller 1460 determines that the user is exhaling. It then controls the oxygen control solenoid valve 1420 to close, cutting off the oxygen output path and preventing oxygen from being wasted while the user is exhaling.

[0101] By pre-setting flow control parameters in the controller 1460, the continuous oxygen supply time of the oxygen outlet 1450 during a single inhalation can reach several seconds. In construction or enclosed spaces, workers often need to take deep breaths, and the single inhalation cycle is relatively long. In this embodiment, the oxygen control component can adaptively adjust the timing and duration of oxygen supply according to the user's breathing rhythm, ensuring that oxygen is supplied throughout the user's deep breathing process, thus avoiding the problems of short single oxygen injection time and low oxygen utilization rate of traditional oxygen concentrators.

[0102] The buffering effect of the gas storage box 1410 ensures that sufficient oxygen is available for output the instant the oxygen control solenoid valve 1420 opens, avoiding insufficient oxygen supply caused by the oxygen generation rate of the oxygen generating component 300 lagging behind the oxygen supply demand. The parallel connection between the micro-pressure sensor 1440 and the oxygen outlet 1450 allows the sensor to sensitively capture minute pressure changes at the oxygen outlet 1450. The controller 1460 responds quickly accordingly, achieving an intelligent following effect of oxygen supply during inhalation and oxygen cutoff during exhalation, significantly improving oxygen utilization efficiency.

[0103] Combination Figure 1 and Figure 9 In some embodiments, the oxygen generator further includes an oxygen delivery assembly 1500. The oxygen delivery assembly 1500 includes an oxygen delivery tube 1510 and a sponge sleeve 1530. One end of the oxygen delivery tube 1510 is connected to an oxygen outlet nozzle 1450, and the other end is provided with an oxygen outlet port 1520. The sponge sleeve 1530 is fitted onto the oxygen outlet port 1520.

[0104] For example, the oxygen inhalation assembly 1500 is used to guide oxygen output from the oxygen control assembly to the user's nasal cavity for inhalation. The oxygen inhalation tube 1510 is a flexible medical-grade tubing, which can be made of polyvinyl chloride or silicone rubber, possessing a certain degree of flexibility and elasticity to allow for free movement when worn by the user. One end of the oxygen inhalation tube 1510 is connected to the oxygen outlet 1450, and the connection method can be a plug-in or threaded connection, ensuring a good seal at the connection to prevent oxygen leakage. The other end of the oxygen inhalation tube 1510 is a free end and is provided with an oxygen outlet port 1520, which is used to insert into the user's nasal cavity, and oxygen flows out from the oxygen outlet port 1520 and enters the user's nasal cavity.

[0105] The sponge sleeve 1530 is a sleeve-shaped component made of porous elastic sponge material, with a central through-hole. The sponge sleeve 1530 is fitted over the oxygen outlet port 1520 through this central through-hole. In its natural state, the outer diameter of the sponge sleeve 1530 is slightly larger than the inner diameter of the human nasal cavity. When the oxygen outlet port 1520 is inserted into the nasal cavity, the sponge sleeve 1530 undergoes elastic deformation under the pressure of the nasal cavity wall, filling the gap between the outer wall of the oxygen outlet port 1520 and the inner wall of the nasal cavity. The softness of the sponge sleeve 1530 prevents damage to the nasal mucosa, while its elastic deformation capability allows it to adapt to nasal cavities of different sizes and shapes, ensuring a good fit with the inner wall of the nasal cavity.

[0106] During the oxygen supply process, the sponge sleeve 1530 plays a dual role: on the one hand, it prevents oxygen from leaking outward from the gap between the outer wall of the oxygen outlet 1520 and the inner wall of the nasal cavity, avoiding waste caused by oxygen loss and ensuring that as much oxygen as possible enters the user's respiratory tract; on the other hand, it prevents dust in the external environment from being inhaled into the nasal cavity through this gap during the user's breathing process.

[0107] In construction or enclosed spaces, a large amount of fine dust is suspended in the air. If this dust enters the user's respiratory tract through respiration, it can irritate the nasal mucosa and throat. Long-term inhalation can also cause irreversible damage to organs such as the lungs. The sealing effect of the sponge sleeve 1530 effectively prevents dust from entering the body through nasal gaps, improving oxygen safety. In addition, the sponge sleeve 1530 also has a certain filtering function. Even if there is a trace amount of residual dust inside the oxygen tubing 1510, the sponge sleeve 1530 can still perform a final filtration of the oxygen about to enter the nasal cavity, further ensuring the cleanliness of the inhaled air.

[0108] Combination Figure 3 In some embodiments, the oxygen generating assembly 300 includes an oxygen generating solenoid valve 310, a first molecular sieve tower 320, and a second molecular sieve tower 330. The inlets of the first molecular sieve tower 320 and the second molecular sieve tower 330 are connected to the gas outlet of the compressor assembly 200 via the oxygen generating solenoid valve 310. The oxygen outlets of both the first and second molecular sieve towers 320 and 330 are connected to the oxygen control solenoid valve 1420.

[0109] For example, the oxygen generating assembly 300 uses the pressure swing adsorption principle for oxygen-nitrogen separation. The oxygen generating solenoid valve 310 is a two-position five-way reversing valve or a combination of two two-position three-way valves. Its inlet is connected to the gas outlet of the compressor assembly 200 through a pipeline, and it has two outlets, which are respectively connected to the inlet of the first molecular sieve tower 320 and the inlet of the second molecular sieve tower 330. Under the control of the control unit 900, the oxygen generating solenoid valve 310 periodically switches its conduction direction, alternately sending compressed air into the first molecular sieve tower 320 and the second molecular sieve tower 330. Both the first molecular sieve tower 320 and the second molecular sieve tower 330 are sealed containers filled with zeolite molecular sieve adsorbent. Zeolite molecular sieves have a preferential adsorption capacity for nitrogen. When compressed air flows through the molecular sieve tower, the nitrogen in the air is adsorbed by the molecular sieve under pressure, while oxygen flows out from the oxygen outlet of the molecular sieve tower as the unadsorbed component. The oxygen outlets of the first molecular sieve tower 320 and the second molecular sieve tower 330 are both connected to the inlet of the oxygen control solenoid valve 1420 via pipelines. The oxygen-enriched gas produced by the two molecular sieve towers is transported to the oxygen control solenoid valve 1420 and then further supplied to the user via the oxygen control solenoid valve 1420 and the flow control unit 1430.

[0110] When the oxygen-generating solenoid valve 310 introduces compressed air into the first molecular sieve tower 320, the internal pressure of the first molecular sieve tower 320 increases, entering the adsorption oxygen generation stage, and its oxygen outlet outputs oxygen-enriched gas. Simultaneously, the second molecular sieve tower 330 connects to the exhaust port, its internal pressure decreases, and the adsorbed nitrogen gas desorbs from the molecular sieve and is discharged to the external environment through the exhaust port; the second molecular sieve tower 330 enters the desorption regeneration stage. After a preset time, the oxygen-generating solenoid valve 310 switches its conduction direction, introducing compressed air into the second molecular sieve tower 330, which then enters the adsorption oxygen generation stage, while the first molecular sieve tower 320 switches to connect to the exhaust port, entering the desorption regeneration stage.

[0111] By periodically switching the oxygen-generating solenoid valve 310, the first molecular sieve tower 320 and the second molecular sieve tower 330 alternately perform adsorption oxygen generation and desorption regeneration, achieving a continuous and stable oxygen production. Since the oxygen outlets of both the first and second molecular sieve towers are connected to the oxygen control solenoid valve 1420, the oxygen produced by both towers can be transported to the solenoid valve 1420 via the same path. This parallel and integrated structural design simplifies the pipeline layout, reduces the number of pipe joints, lowers the risk of gas leakage, and avoids the pipeline complexity issues associated with separate oxygen supply pipelines for each molecular sieve tower. At the moment the oxygen-generating solenoid valve 310 switches, a small amount of residual oxygen in the molecular sieve tower switching from the adsorption oxygen generation stage to the desorption regeneration stage may be discharged with the waste gas, but the other molecular sieve tower is entering the adsorption oxygen generation stage and continuously producing oxygen, thus not affecting the continuity of oxygen supply at the outlet.

[0112] In some embodiments, the first molecular sieve tower 320 has a first exhaust port, and the second molecular sieve tower 330 has a second exhaust port. The oxygen generator also includes an exhaust pipe, the inlet of which is connected to the first and second exhaust ports respectively, and the outlet of which extends to the outside of the casing 100. The first molecular sieve tower 320 and the second molecular sieve tower 330 alternately perform adsorption oxygen generation and desorption regeneration. When the first molecular sieve tower 320 is in the desorption regeneration stage, the nitrogen desorbed inside it flows into the exhaust pipe through the first exhaust port and is discharged to the outside of the casing 100; when the second molecular sieve tower 330 is in the desorption regeneration stage, the nitrogen desorbed inside it flows into the exhaust pipe through the second exhaust port and is discharged to the outside of the casing 100. By installing an exhaust pipe, the waste gas released from the first molecular sieve tower 320 and the second molecular sieve tower 330 during desorption and regeneration can be discharged to the outside of the casing 100 in a timely and smooth manner, preventing the waste gas from accumulating inside the casing 100 and affecting the normal operation of the oxygen generator. At the same time, the exhaust pipe extends the exhaust outlet to the outside of the casing 100, preventing nitrogen-rich waste gas from diluting the oxygen concentration inside the casing 100 and ensuring the safety of the gas environment inside the main compartment 141.

[0113] In some embodiments, the compressor assembly 200 includes a compressor and a filter cotton disposed at the compressor intake end. This filter cotton serves as the final filtration barrier at the compressor intake end, used to further filter the gas about to enter the compressor. After being filtered through the outer filter assembly 400 and the inner filter assembly 500, the air flows through the filter cotton before entering the compressor intake port. The filter cotton provides final interception of any trace dust that may remain in the airflow, further reducing the risk of dust entering the compressor cylinder.

[0114] The filter cotton can be made of non-woven fabric or foam sponge material, which has high filtration efficiency and low flow resistance. Since the filter cotton is located at the air inlet of the compressor, it is in the air passage between the internal filter assembly 500 and the compressor. The airflow has a high degree of cleanliness after being filtered by the internal filter assembly 500. Therefore, the filter cotton has a small filtration load and a long service life, and does not need to be replaced frequently.

[0115] At the same time, the filter cotton also plays a role in noise reduction, which can reduce the pulsating noise generated when the airflow enters the compressor intake.

[0116] The triple filtration system, consisting of the external filter assembly 400, the internal filter assembly 500, and the compressor intake filter cotton, forms a complete filtration chain from the outside of the casing 100 to the inside of the compressor, effectively ensuring the cleanliness of the air entering the compressor.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An oxygen generator, characterized in that, The system includes a chassis, a compressor assembly, and an oxygen generating assembly. The compressor assembly and the oxygen generating assembly are disposed within the chassis. The gas outlet of the compressor assembly is connected to the inlet of the oxygen generating assembly. The system also includes: An external filter assembly is provided, wherein the chassis is provided with an air inlet, the air inlet connecting the internal cavity of the chassis to the external environment, and the external filter assembly is disposed at the air inlet; and An internal filter assembly is fixed inside the chassis. The inlet of the internal filter assembly is connected to the inner cavity of the chassis, and the outlet of the internal filter assembly is connected to the gas inlet of the compressor assembly.

2. The oxygen generator according to claim 1, characterized in that, The external filter assembly includes: The outer grille is detachably connected to the chassis and is located outside the air inlet; The inner grille is fixedly connected to the chassis and is located inside the air inlet; The first filter element is located between the outer grid plate and the inner grid plate.

3. The oxygen generator according to claim 2, characterized in that, The chassis includes an outer shell and a base fixedly disposed inside the outer shell, and the internal filter assembly includes: A filter box is fixed to the base. The filter box is provided with a filter groove and an air nozzle, and the air nozzle is connected to the filter groove. A pressure cap is detachably mounted on the filter box and located at the opening of the filter groove; the pressure cap has an air inlet. The second filter element is disposed within the filter tank; and A connecting pipe, one end of which is connected to the gas nozzle and the other end of which is connected to the gas inlet of the compressor assembly.

4. The oxygen generator according to claim 3, characterized in that, Also includes: The power supply battery is provided, and the base and the outer shell form a main compartment and a battery compartment. The compressor assembly and the oxygen generation assembly are disposed in the main compartment. The battery compartment has a first communication port that connects to the main compartment. The power supply battery is disposed in the battery compartment. A gas flow channel is formed between the power supply battery and the outer shell. One end of the gas flow channel is connected to the air inlet, and the other end extends to the first communication port.

5. The oxygen generator according to claim 4, characterized in that, The battery compartment has a second connection port, which connects to the end of the gas flow channel opposite to the air inlet. At least two external filter assemblies are provided, with one portion of the external filter assembly connected to the main compartment and the other portion connected to the second connection port. The oxygen generator also includes: An adjustment component, disposed on the base, is used to adjust the opening degree of the first communication port and the second communication port; The first temperature measuring unit is disposed on the base and is used to detect the temperature inside the battery compartment; The control unit is electrically connected to the regulating component and the first temperature measuring unit, and the control unit is configured as follows: When the temperature inside the battery compartment exceeds a first threshold, the regulating component is controlled to reduce the opening of the first connection port and increase the opening of the second connection port. When the temperature inside the battery compartment is less than a second threshold, the regulating component is controlled to increase the opening of the first connection port and decrease the opening of the second connection port, wherein the second threshold is less than the first threshold.

6. The oxygen generator according to claim 5, characterized in that, The adjustment component includes: An adjustment seat, located inside the battery compartment, has an adjustment cavity and a first adjustment port, a second adjustment port, and an air outlet communicating with the adjustment cavity. The first adjustment port is communicating with the first communication port, the second adjustment port is communicating with the second communication port, and the air outlet is communicating with the end of the gas flow channel away from the air inlet. A rotating cylinder is rotatably disposed in the adjustment cavity. One end of the rotating cylinder is always connected to the air outlet, and the other end is provided with an end plate. The peripheral wall of the rotating cylinder is provided with a first through hole corresponding to the first adjustment port and a second through hole corresponding to the second adjustment port. A rotating shaft passes through the adjustment seat, one end of which is fixedly connected to the end plate, and the other end extends out of the adjustment seat and the battery compartment. A drive unit, located outside the battery compartment and connected to the rotating shaft, is used to drive the rotating cylinder to rotate between a first angle and a second angle. When the rotating cylinder is at the first angle, the first through hole and the first adjustment port are directly connected, and the cylinder wall of the rotating cylinder closes the second adjustment port; When the rotating cylinder is at the second angle, the second through hole and the second adjustment port are directly connected, and the cylinder wall of the rotating cylinder closes the first adjustment port; When the rotating cylinder is located between the first angle and the second angle, the first through hole is partially connected to the first adjustment port, and the second through hole is partially connected to the second adjustment port.

7. The oxygen generator according to claim 5, characterized in that, Also includes: A cooling fan is installed inside the main compartment and above the compressor assembly, with the airflow direction of the cooling fan pointing downwards. An exhaust control assembly is provided in the outer casing, which has an exhaust port connecting the main cabin and the external environment. The exhaust control assembly is disposed in the outer casing and electrically connected to the control unit for adjusting the opening of the exhaust port. The second temperature measuring unit is electrically connected to the control unit and is used to detect the temperature inside the main cabin; The control unit is further configured as follows: When the main cabin temperature is higher than the third threshold, the cooling fan is activated, and the exhaust control component is controlled to increase the opening of the exhaust port according to the difference between the main cabin temperature and the third threshold. When the main cabin temperature is lower than the fourth threshold, the cooling fan is turned off, and the exhaust control component is controlled to reduce the opening of the exhaust port based on the difference between the main cabin temperature and the fourth threshold. When the temperature of the battery compartment is lower than the second threshold and the temperature of the main compartment is lower than the fifth threshold, the control unit shuts down the cooling fan and reduces the opening of the exhaust vent. Wherein, the second threshold is less than the fifth threshold, the fourth threshold is less than the fifth threshold, and the fifth threshold is less than the third threshold.

8. The oxygen generator according to any one of claims 1 to 7, characterized in that, It also includes an oxygen control component, which includes a gas storage box, an oxygen control solenoid valve, a flow control unit, a micro-pressure sensor, an oxygen outlet nozzle, and a controller. The inlet of the gas storage box is connected to the oxygen outlet of the oxygen generation component, and the outlet of the gas storage box is connected to the inlet of the flow control unit through the oxygen control solenoid valve. The micro-pressure sensor and the oxygen outlet nozzle are connected in parallel to the outlet of the flow control unit. The controller is electrically connected to the micro-pressure sensor, the oxygen control solenoid valve, and the flow control unit, respectively. The controller is configured to control the on / off state of the oxygen control solenoid valve and / or the output flow of the flow control unit based on the pressure signal detected by the micro-pressure sensor.

9. The oxygen generator according to claim 8, characterized in that, It also includes an oxygen inhalation assembly, which includes an oxygen inhalation tube and a sponge sleeve. One end of the oxygen inhalation tube is connected to the oxygen outlet nozzle, and the other end is provided with an oxygen outlet port. The sponge sleeve is fitted onto the oxygen outlet port.

10. The oxygen generator according to claim 8, characterized in that, The oxygen generating assembly includes an oxygen generating solenoid valve, a first molecular sieve tower, and a second molecular sieve tower. The inlets of the first and second molecular sieve towers are connected to the gas outlet of the compressor assembly through the oxygen generating solenoid valve. The oxygen outlets of the first and second molecular sieve towers are both connected to the oxygen control solenoid valve.

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