Adsorption device for portable oxygen generator

Abstract

The invention relates to the technical field of portable oxygen production equipment, and particularly discloses an adsorption device for a portable oxygen generator, the adsorption device comprises a portable machine shell and an adsorption mechanism, the portable machine shell is provided with an air inlet through hole and an air outlet through hole, the adsorption mechanism comprises an oxygen-enriched element, the portable machine shell is provided with an air supply pipe head, and the air supply pipe head is provided with an air outlet through hole. An airflow pipeline is connected between the oxygen-enriched element and the air supply pipe head; the oxygen enrichment device further comprises an air supply air pump located between the oxygen enrichment element and the air supply pipe head, an auxiliary air pipe, an auxiliary air valve and a humidity sensor, the auxiliary air valve is located on the auxiliary air pipe, one end of the auxiliary air pipe is connected with the airflow pipeline, and the connecting point is located between the oxygen enrichment element and the air supply air pump. The humidity sensor is used for detecting humidity in the airflow pipeline. According to the invention, the auxiliary gas pipe is connected in parallel beside the oxygen-enriched element, so that gas can enter the gas flow pipeline without passing through the oxygen-enriched element when water in the gas flow pipeline is removed, the water removal effect is relatively high, and the consumption of oxygen is relatively low.

Description

Technical Field

[0001] The present invention relates to the technical field of portable oxygen generators, and in particular to an adsorption device for a portable oxygen generator. Background Art

[0002] A portable oxygen concentrator is a medical device that can provide high-concentration oxygen anytime and anywhere, and is mainly used to improve the body's hypoxic state. It extracts oxygen from the air through physical or chemical means to help people with respiratory diseases or in low-oxygen environments such as plateaus maintain normal blood oxygen levels. Compared with traditional large oxygen concentrators, it weighs less than 5 kilograms and is smaller than an ordinary backpack. The built-in battery can support several hours of continuous work, making it suitable for use at home, outings, and even travel. For patients with chronic obstructive pulmonary disease, pulmonary fibrosis, and people with heart failure, portable oxygen concentrators can significantly improve their ability to carry out daily activities. In recent years, with technological advances, this type of equipment has been significantly improved in noise control, oxygen concentration stability, and other aspects, and has become an important tool in the field of respiratory support.

[0003] Oxygen-enriching membranes are the core components of oxygen concentrators that use physical oxygen production methods. Made from polymer materials such as polydimethylsiloxane (PDMS) and polypropylene (PP), these membranes employ an oxygen adsorption-diffusion mechanism, whereby gas molecules first dissolve in the membrane material and then diffuse to the other side via a concentration gradient. Oxygen has a higher solubility and diffusion coefficient in the membrane than nitrogen, enabling separation. Passing a single layer of oxygen-enriched membrane can increase the oxygen content in air by approximately 30%, resulting in energy savings of 10%-25% compared to traditional oxygen production methods.

[0004] Chinese patent document CN220432354U discloses a portable oxygen concentrator gas circuit system, comprising an oxygen concentrator circuit, an auxiliary concentrator circuit, and a controller electrically connected to the oxygen concentrator circuit and the auxiliary concentrator circuit. The oxygen concentrator circuit and the auxiliary concentrator circuit each have their inlet and outlet sealed to the concentrator's inlet, while the oxygen concentrator circuit's outlet and the auxiliary concentrator's outlet are sealed to the concentrator's outlet. The oxygen concentrator circuit includes a continuous oxygen supply circuit and a pulsed oxygen supply circuit, as well as an air pump for driving air flow. The auxiliary concentrator circuit is used to cool and dissipate heat in the oxygen concentrator circuit and accelerate air flow through the oxygen concentrator components within the circuit.

[0005] In the above technical solution, two parallel, fully enclosed airflow pipelines run from the oxygen-enriched membrane assembly to the three-way valve. When this oxygen concentrator is used in high-altitude environments or other environments with large temperature differences, water vapor condenses easily inside the concentrator, producing mist or water droplets. Once water vapor accumulates in the pipeline, the exhaust port becomes the only outlet for the water vapor, forcing it to be removed by airflow through the oxygen-enriched membrane assembly. Consequently, the water vapor formed in the pipeline has a significant negative impact on the pipeline's smooth flow and the purity of the subsequent gas supply. If the air pump is turned on before use to allow high-speed airflow to expel the water vapor from the pipeline, the oxygen produced by the oxygen-enriched membrane assembly will be significantly wasted. Summary of the Invention

[0006] The present invention provides an adsorption device for a portable oxygen concentrator, aiming to improve the negative impact of water vapor in a pipeline in the related art.

[0007] An adsorption device for a portable oxygen concentrator of the present invention comprises a portable housing and an adsorption mechanism, wherein the portable housing is provided with an air inlet hole and an air outlet hole, the adsorption mechanism comprises an oxygen enrichment element, the portable housing is provided with an air supply pipe head, an air flow pipeline is connected between the oxygen enrichment element and the air supply pipe head; further comprising an air supply air pump, the air supply air pump being located between the oxygen enrichment element and the air supply pipe head, an auxiliary air pipe and an auxiliary air valve being located on the auxiliary air pipe, one end of the auxiliary air pipe being connected to the air flow pipeline and the connection point being located between the oxygen enrichment element and the air supply air pump, and further comprising a humidity sensor, the humidity sensor being used to detect the humidity in the air flow pipeline.

[0008] The effect is that the oxygen-enriching element is used to produce oxygen, and the auxiliary air pipe and the oxygen-enriching element form two air inlet ports for gas to enter the air flow pipeline. When in use, the auxiliary air valve is closed, and the air flow enters the portable case from the air inlet hole and passes through the oxygen-enriching element. The oxygen-enriching element collects and supplies oxygen under the action of the air flow. Before use, the auxiliary air valve is opened first. Under the action of the air supply air pump, the gas entering the air flow pipeline through the auxiliary air pipe flows at a higher flow rate. Since the air flow resistance at the oxygen-enriching element is greater, the air flow passing through the oxygen-enriching element at this time is relatively weak, and the oxygen collected by the oxygen-enriching element is consumed less, that is, the oxygen content of the gas actually flowing into the air flow pipe is smaller and the air flow intensity is higher, which can effectively carry the condensed water in the air flow pipeline to the air supply pipe head, thereby achieving the discharge of water vapor in the pipeline while reducing the waste of oxygen molecules, reducing the negative impact of water vapor in the air flow pipeline on the high-oxygen gas during use.

[0009] Preferably, the oxygen-enriching element includes a supporting frame and an oxygen-enriching membrane, the oxygen-enriching membrane and the supporting frame are fixedly connected, an oxygen-enriched space is formed in the supporting frame through the oxygen-enriched membrane, the supporting frame is fixedly connected to a supporting core, the supporting core is located in the oxygen-enriched space, and a fixed pipe head is fixedly connected to the supporting frame, one end of the fixed pipe head is connected to the airflow pipeline, and the other end is connected to the oxygen-enriched space.

[0010] The effect is that when air passes through the oxygen-enriched element, the gas molecules first dissolve in the membrane material and then diffuse to the side close to the oxygen-enriched space through the concentration gradient; the solubility and diffusion coefficient of oxygen in the membrane are higher than those of nitrogen, thereby achieving separation and the capture of oxygen by the oxygen-enriched membrane. Under the premise of turning on the air supply pump, the oxygen-enriched membrane is subjected to a greater airflow pressure, and the support core supports the oxygen-enriched membrane in the oxygen-enriched space, thereby improving the structural stability of the oxygen-enriched membrane.

[0011] Preferably, there are multiple oxygen-enriched elements, and the multiple support frames are arranged in parallel. The fixed pipe heads of the multiple oxygen-enriched elements are commonly connected to the same oxygen-enriched main air pipe. A wind gap is formed between two adjacent oxygen-enriched elements. The opening directions of the air inlet hole and the air outlet hole are parallel, and the oxygen-enriched element is located between the air outlet hole and the air inlet hole. The membrane surface of the oxygen-enriched membrane is perpendicular to the arrangement direction of the multiple oxygen-enriched elements and parallel to the opening direction of the air inlet hole. An air intake fan is provided in the portable casing and at the air inlet hole.

[0012] The effect is that the air intake fan improves the gas flow efficiency inside the portable housing, the contact efficiency between the oxygen-enriched membrane and fresh air becomes higher, and thus the oxygen collection rate of the oxygen-enriched membrane is increased.

[0013] Preferably, an air flow pressure stabilizing tank is fixedly connected to the portable housing, and the air flow pressure stabilizing tank is connected to the air flow pipeline between the air supply pipe head and the air supply air pump, and the air outlet of the air flow pressure stabilizing tank is coaxial with the air supply pipe head.

[0014] The effect is that: after the gas carrying water vapor enters the air flow pressure regulating tank, the flow rate decreases, and liquid water accumulates and gathers in the air flow pressure regulating tank; after the amount of water accumulated in the air flow pressure regulating tank increases, it becomes fluid, and the operator can invert the portable casing so that the air supply pipe head faces the ground to pour out the water in the air flow pressure regulating tank.

[0015] Preferably, the support frames located on both sides of the wind gap slide relatively close to or away from each other, and the adsorption mechanism further includes an adjustment component, which is used to control the movement of the support frames. When the auxiliary air valve is opened, the adjacent support frames are in contact with each other.

[0016] The effect is that controlling the movement of the support frame can change the width of the air gap between two adjacent support frames. When the gap between the two support frames disappears, the oxygen-enriched membrane between the two adjacent support frames is no longer in contact with the external space, that is, the amount of air passing through this part of the oxygen-enriched membrane after the air supply pump is started is reduced, and the oxygen consumption on this oxygen-enriched membrane is also reduced.

[0017] Preferably, the adjustment assembly includes an adjustment guide column, a pressure piece and a matching spring. The adjustment guide column and the portable housing are relatively fixed. The length direction of the adjustment guide column is parallel to the arrangement direction of multiple support frames. The adjustment guide column passes through multiple support frames. The matching spring is coaxially sleeved on the adjustment guide column. The two ends of the matching spring are respectively connected to two adjacent support frames. The pressure piece is used to apply thrust to the support frame, and the direction of the thrust is parallel to the extension and contraction direction of the matching spring.

[0018] The effect is: the guide column is adjusted to position and support each support frame, and provide guidance for the sliding of the support frame. The thrust of the pressure piece on the edge support frame and the elastic force of the matching spring on the support frame are in opposite directions. The two forces cooperate with each other to achieve position adjustment of the support frame.

[0019] Preferably, the number of the support frames is three, the pressure piece is a pressure box, the pressure box includes two connecting end plates and two force push rods, the connecting end plates and the force push rods are fixedly connected, the connecting end plates and the support frame located in the middle are rotatably connected, the rotation axis is perpendicular to the arrangement direction of the support frame, the length direction of the force push rod is parallel to the rotation axis of the connecting end plate, the three support frames are located between the two force push rods, and the force push rods generate a thrust toward the wind gap on the support frame located at the edge.

[0020] The effect is that when the pressure frame rotates, its two force push rods push the support frames at the two edges from both sides of the oxygen-enriched element, so that the two support frames can move toward the middle support frame at the same time, and finally each support frame is closely abutted in turn.

[0021] Preferably, the oxygen-enriched main gas pipe includes a rigid straight tube portion and a telescopic tube portion. A single rigid straight tube portion is fixedly connected and communicated with a fixed pipe head on a support frame. Two adjacent rigid straight tube portions are communicated through a telescopic tube portion, and the axial length of the telescopic tube portion is variable.

[0022] The effect is that the telescopic tube portion can undergo axial deformation, thereby the oxygen-enriched main air pipe can undergo axial deformation. During the movement of the support frame, the movement of the support frame is accompanied by changes in the relative positions of the various fixed pipe heads. The axially deformable oxygen-enriched main air pipe can maintain continuous and stable sealed connection between the oxygen-enriched space and the airflow pipeline.

[0023] Preferably, the support frame and the adjustment guide column in the middle are fixedly connected, one end of the adjustment guide column is rotatably connected to a mounting threaded barrel, a mounting screw is fixedly connected to the inner wall of the portable housing, and the mounting screw and the mounting threaded barrel are coaxially threaded.

[0024] The effect is that the mounting threaded barrel is threadedly connected to the mounting screw, the mounting threaded barrel is relatively connected and fixed to the portable casing, and the adjustment guide column is connected and installed with the portable casing through the mounting threaded barrel, thereby realizing the installation of various oxygen-enriched components on the adjustment guide column inside the portable casing.

[0025] Preferably, a driving motor is provided in the portable housing, and a connecting shaft is fixedly connected to the connecting end plate. The connecting shaft is rotatably connected to the supporting frame located in the middle, and a mating sleeve is coaxially slidingly provided at the end of the connecting shaft away from the supporting frame. A connecting spring is connected between the mating sleeve and the connecting shaft. The cross-sections of the output shaft of the driving motor and the mating sleeve are both non-circular. In a natural state, when the axes of the connecting shaft and the output shaft of the driving motor coincide, the mating sleeve is sleeved on the output shaft of the driving motor.

[0026] The effect is that after the oxygen enrichment element is installed in the portable housing through the adjustment guide column and the installation threaded cylinder, the matching sleeve on the connecting shaft can be sleeved on the output shaft of the driving motor and the two can cooperate with each other. The output shaft of the driving motor can transmit torque to the pressure frame through the matching sleeve and the connecting shaft, so that the pressure frame can rotate.

[0027] By adopting the above technical solution, the beneficial effects of the present invention are: The present invention arranges the auxiliary air valve, the auxiliary air pipe and the oxygen-enriching element in parallel. When water vapor accumulates in the air flow pipeline, the auxiliary air valve is opened. Since the communication resistance between the auxiliary air pipe and the outside world is small, a high-intensity airflow can be formed in the air flow pipeline after the air supply pump is turned on, which produces a pushing force on the liquid water along the way, so that the water can be discharged smoothly, and the consumption of oxygen molecules accumulated on the oxygen-enriched membrane is small. On this basis, the adjustment component changes the utilization rate of the oxygen-enriched membrane by changing the relative positions of the support frames, thereby further improving the air resistance at the oxygen-enriched element in the water removal mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 1 is a schematic diagram of the overall structure of an adsorption device for a portable oxygen concentrator in the first embodiment of the present invention.

[0029] Figure 2 1 is a schematic diagram of a gas passage of an adsorption device for a portable oxygen concentrator in the first embodiment of the present invention.

[0030] Figure 3It is a structural schematic diagram of the adsorption mechanism in the first embodiment of the present invention.

[0031] Figure 4 It is a structural diagram of the oxygen enrichment element in the second embodiment of the present invention.

[0032] Figure 5 It is a schematic structural diagram of an oxygen-enriching element in oxygen collection mode in the second embodiment of the present invention.

[0033] Figure 6 It is a schematic structural diagram of the oxygen enrichment element in the water removal mode in the second embodiment of the present invention.

[0034] Figure 7 It is a schematic diagram of the matching structure of the driving motor and the connecting shaft in the second embodiment of the present invention.

[0035] Reference numerals: 1. Portable housing; 11. Air inlet hole; 12. Air outlet hole; 13. Air supply pipe head; 14. Mounting screw; 15. Humidity sensor; 16. Oxygen concentration sensor; 17. Control circuit board; 171. Battery module; 18. Display screen; 2. Air supply pump; 21. Air flow pipeline; 22. Auxiliary air valve; 221. Auxiliary air pipe; 23. Air flow regulator tank; 3. Adsorption mechanism; 31. Air intake fan; 32. Oxygen enrichment element; 321. Oxygen enrichment membrane; 322. Support frame; 323. Oxygen enrichment Oxygen space; 324, support core; 325, fixed pipe head; 33, oxygen-enriched main air pipe; 331, rigid straight pipe part; 332, telescopic pipe part; 34, air gap; 4, adjustment component; 41, adjustment guide column; 411, installation threaded cylinder; 42, matching spring; 43, pressure piece; 431, pressure box; 4311, connecting end plate; 4312, force push rod; 4313, contact sleeve; 432, connecting shaft; 44, matching sleeve; 441, connecting spring; 45, driving motor. DETAILED DESCRIPTION

[0036] The following combination Figures 1 to 7 The present invention describes an adsorption device for a portable oxygen concentrator.

[0037] Example 1: This embodiment discloses an adsorption device for a portable oxygen concentrator. Figure 1 、 Figure 2 and Figure 3As shown, the oxygen concentrator includes a portable housing 1, which is internally equipped with an adsorption mechanism 3, an air supply pump 2, a battery module 171, a control circuit board 17, and an oxygen concentration sensor 16. The portable housing 1 is provided with an air inlet hole 11 and an air outlet hole 12 for gas to enter and exit. A gas supply pipe head 13 is fixedly mounted on the portable housing 1. The adsorption mechanism 3 is used to capture oxygen molecules from the airflow entering the portable housing 1. The adsorption mechanism 3 includes an oxygen enrichment element 32. The oxygen enrichment element 32, the air supply pump 2, the oxygen concentration sensor 16, and the air supply pipe head 13 are sequentially connected via an airflow pipeline 21. The oxygen concentration sensor 16 is used to detect the oxygen content in the passing gas. In this embodiment, the portable housing 1 is a rectangular plastic shell with operating buttons and a display screen 18 on one side. The air supply pipe head 13 is located on the same side as the display screen 18. The display screen 18 displays information such as the battery level, operating mode, oxygen concentration of the supplied gas, and humidity. During use, the portable housing 1 can be easily held by the operator. The air supply pipe head 13 is vertically oriented, with the upper side being the upper side. The air inlet 11 and air outlet 12 are located on opposite side walls of the portable housing 1 near the bottom. A battery module 171 is used to power the control circuit board 17, the oxygen concentration sensor 16, the air supply pump 2, and the display screen 18.

[0038] like Figure 1 and Figure 3 As shown, the oxygen-enriching element 32 includes a supporting frame 322 and an oxygen-enriching membrane 321. The oxygen-enriching membrane 321 is fixedly mounted on the supporting frame 322. The supporting frame 322 is a square frame. There are three oxygen-enriching elements 32. The number of oxygen-enriching membranes 321 on a single supporting frame 322 is two. The two oxygen-enriching membranes 321 are respectively located on opposite sides of the supporting frame 322 and the membrane surfaces are parallel to each other. Three support frames 322 are arranged side by side, perpendicular to the surface of the oxygen-enriching membrane 321. A windage gap 34 is formed between adjacent oxygen-enriching elements 32. The openings of the air inlet 11 and the air outlet 12 are parallel, and the oxygen-enriching elements 32 are located between the air outlet 12 and the air inlet 11. The openings of the air outlet 12 and the air inlet 11 are parallel to the surface of the oxygen-enriching membrane 321. This means that airflow enters the air inlet 11 without changing its direction, then directly passes through the windage gap 34 and exits the portable case 1 through the air outlet 12. An air intake fan 31 is fixedly mounted within the portable case 1 at the air inlet 11. When in operation, the air intake fan 31 generates airflow from the external space into the interior of the portable case 1, thereby increasing the speed at which fresh air enters the portable case 1.

[0039] like Figure 3As shown, an oxygen-enriched space 323 is formed in the support frame 322 through the oxygen-enriched membrane 321, and a fixed pipe head 325 is fixedly connected to the support frame 322. The fixed pipe heads 325 of the three oxygen-enriched elements 32 are commonly connected to the same oxygen-enriched main gas pipe 33, and the oxygen-enriched main gas pipe 33 is connected to the port of the air flow pipeline 21. When the air supply air pump 2 is started, a negative pressure is generated in the oxygen-enriched space 323, and the oxygen molecules captured on the oxygen-enriched membrane 321 are brought into the air flow pipeline 21. Finally, the air supply pipe head 13 can supply gas with a higher oxygen concentration to the outside. The support frame 322 is fixedly connected to the support core 324, which is located in the oxygen-enriched space 323 and is used to provide structural support for the oxygen-enriched membrane 321; the support core 324 is a plastic plate with a surface covered with a raised groove structure. Under the action of the air supply pump 2, when the gas passes through the oxygen-enriched membrane 321 and enters the oxygen-enriched space 323, the effect of the air pressure will cause the oxygen-enriched membrane 321 to have a bending deformation tendency toward the oxygen-enriched space 323. The support core 324 can generate a supporting force for the anti-deformation of the oxygen-enriched membrane 321, thereby improving the structural stability of the oxygen-enriched membrane 321. At the same time, the groove structure it has itself can also enable the gas entering the oxygen-enriched space 323 to flow relatively freely.

[0040] like Figure 1 and Figure 2 As shown, the portable housing 1 is also equipped with an air flow regulator 23, which is connected to the air supply line between the oxygen concentration sensor 16 and the air supply pipe head 13. The adsorption device also includes an auxiliary air pipe 221, an auxiliary air valve 22, and a humidity sensor 15. One end of the auxiliary air pipe 221 is connected to the air flow line 21, with the connection point located between the oxygen enrichment element 32 and the air supply pump 2, while the other end is open. The auxiliary air valve 22 is located on the auxiliary air pipe 221 and is a solenoid valve powered by the battery module 171. The opening and closing of the auxiliary air valve 22 controls the flow of the auxiliary air pipe 221. Water vapor in the air flow line 21 primarily condenses between the air supply pump 2 and the air flow regulator 23. The humidity sensor 15's detection point is located on the air supply line between the air supply pump 2 and the oxygen concentration sensor 16, and between the oxygen concentration sensor 16 and the air flow regulator 23. The gas outlet of the air flow stabilizing tank 23 is coaxial with the gas supply pipe head 13 . After the gas enters the air flow stabilizing tank 23 , the flow rate decreases, and liquid water accumulates and gathers in the air flow stabilizing tank 23 .

[0041] The working process and principle of this embodiment are as follows: when the humidity sensor 15 detects condensation in the air flow pipe 21, it provides feedback to the control circuit board 17. The operator can then control the auxiliary air valve 22 to open, and the auxiliary air pipe 221 to be connected. At this time, the air supply pump 2 is started, and the device enters the drainage mode. The air flow in the portable housing 1 can smoothly enter the air flow pipe 21 through the auxiliary air pipe 221. Since the air resistance in the auxiliary air pipe 221 is relatively small, the gas flow rate in the air flow pipe 21 is relatively high, and the gas entrains the condensed water in the air flow pipe 21 and moves toward the air supply pipe head 13. Due to the presence of the oxygen enrichment membrane 321, the resistance of air entering the air flow pipe 21 through the oxygen enrichment element 32 is relatively large, so the air flow here is greatly reduced, and the molecular weight of oxygen that can be removed from the oxygen enrichment membrane 321 by the air pressure is also small. As a result, the oxygen content of the gas in the air flow pipe 21 is low, and the oxygen collected by the oxygen enrichment element 32 is less consumed. When the amount of water stored in the air flow stabilizing tank 23 increases, it forms water droplets, thus becoming fluid. The operator can invert the portable housing 1 so that the air supply pipe head 13 faces the ground and gently shake it to pour out the water in the air flow stabilizing tank 23 under the action of gravity.

[0042] Example 2: like Figure 4 、 Figure 5 and Figure 6 As shown, the difference from Example 1 is that the adsorption mechanism 3 also includes an adjustment component 4, which is used to control the movement of the two support frames 322 located at the edge, and the movement direction is perpendicular to the membrane surface of the oxygen-enriched membrane 321. The adjustment component 4 includes an adjustment guide column 41, a pressure piece 43 and a matching spring 42. The length direction of the adjustment guide column 41 is parallel to the arrangement direction of the multiple support frames 322. The number of the adjustment guide columns 41 is four, and the four adjustment guide columns 41 are respectively located at the four corner edges of the support frame 322. Each adjustment guide column 41 passes through the three support frames 322. The matching spring 42 is coaxially sleeved on the adjustment guide column 41 and is located between two adjacent support frames 322. The two ends of the matching spring 42 are respectively connected to the two adjacent support frames 322. When the matching spring 42 is in a natural state, the width of the air gap 34 between two adjacent oxygen-enriched elements 32 is 1.5 cm. The central support frame 322 is fixedly connected to the adjustment guide post 41, while the support frames 322 on either side are slidably connected to the adjustment guide post 41, with the sliding direction being the length of the adjustment guide post 41. One end of the adjustment guide post 41 is coaxially rotatably connected to a mounting threaded barrel 411. A mounting screw 14 is fixedly connected to the inner wall of the portable housing 1. The mounting screw 14 and the mounting threaded barrel 411 are coaxially threadedly connected, thereby enabling the adjustment guide post 41 and each oxygen enrichment element 32 to be installed within the portable housing 1.

[0043] like Figure 4 、 Figure 5 and Figure 6As shown, the pressure member 43 is used to apply a thrust to the support frames 322 located at the edges, causing the support frames 322 to move toward the center support frame 322. The pressure member 43 is a pressure frame 431, which includes two connecting end plates 4311 and two force-applying push rods 4312. The surfaces of the two connecting end plates 4311 are parallel, and the two force-applying push rods 4312 are located between the two connecting end plates 4311, with the surfaces of the connecting end plates 4311 and the length directions of the force-applying push rods 4312 perpendicular. A connecting shaft 432 is fixedly connected to the connecting end plates 4311. The connecting shaft 432 is rotatably connected to the support frame 322 located at the center, with the rotation axis perpendicular to the arrangement direction of the support frames 322. The length directions of the force-applying push rods 4312 are parallel to the rotation axis of the connecting end plates 4311. The three support frames 322 are located within the space formed by the two force-applying push rods 4312 and the two connecting end plates 4311. When the connecting end plate 4311 rotates, the force-applying push rod 4312 can generate a thrust on the support frame 322 at the edge toward the wind gap 34. A contact sleeve 4313 is coaxially mounted on the force-applying push rod 4312. When the force-applying push rod 4312 applies pressure to the support frame 322, the outer wall of the contact sleeve 4313 directly rolls against the support frame 322.

[0044] like Figure 4 and Figure 7 As shown, a driving motor 45 is provided in the portable housing 1, and a mating sleeve 44 is coaxially slidably provided at one end of the connecting shaft 432 away from the supporting frame 322. After each mounting threaded cylinder 411 and each mounting screw 14 are mated and connected, the mating sleeve 44 and the output shaft of the driving motor 45 are coaxial. The cross-sections of the output shaft of the driving motor 45, the connecting shaft 432 and the mating sleeve 44 are all square. A connecting spring 441 is connected between the mating sleeve 44 and the connecting shaft 432. In a natural state, when the oxygen-enriching element 32 is connected to the portable housing 1 through the cooperation of the mounting screw 14 and the mounting threaded cylinder 411, the mating sleeve 44 is sleeved on the output shaft of the driving motor 45, that is, when the output shaft of the driving motor 45 rotates, it can transmit torque to the mating sleeve 44 and the connecting shaft 432 to make them rotate synchronously, thereby realizing the rotation control of the pressure frame 431; when the oxygen-enriching element 32 is disassembled and assembled, the mating sleeve 44 is pushed in the direction that can compress the connecting spring 441, so that the output shaft of the driving motor 45 will not hinder the movement of the mating sleeve 44. After the driving motor 45 is started, the pressure box 431 rotates, and the force push rod 4312 pushes the support frames 322 on both sides to move closer to the middle support frame 322, and finally the two adjacent support frames 322 abut against each other, and the air gap 34 between the two adjacent support frames 322 disappears.

[0045] like Figure 5As shown, in order to keep the air path from the oxygen-enriched element 32 to the airflow pipeline 21 sealed and unobstructed when the support frame 322 moves, the oxygen-enriched main air pipe 33 in this embodiment includes three rigid straight pipe portions 331 and two telescopic pipe portions 332. A single rigid straight pipe portion 331 is fixedly connected and communicated with a fixed pipe head 325 on a support frame 322, and two adjacent rigid straight pipe portions 331 are communicated through a telescopic pipe portion 332. The telescopic pipe portion 332 is a telescopic bellows, and its end is coaxially fixedly connected to the pipe mouth of the rigid straight pipe portion 331.

[0046] The working process and principle of this embodiment are as follows: when collecting and supplying oxygen, the air gap 34 remains and each oxygen-enriched membrane 321 is in working condition; when discharging water vapor, the adjustment mechanism controls the support frames 322 at the two edges to move toward the middle support frame 322, and the air gap 34 no longer exists. The number of oxygen-enriched membranes 321 that can allow air to pass through and enter the oxygen-enriched space 323 is reduced from six to two, that is, only the oxygen-enriched membranes 321 on the side of the two edge support frames 322 facing away from the middle support frame 322 are available for air to enter. Then, the resistance to entering the airflow pipeline 21 through the oxygen-enriching element 32 is further increased, and the airflow intensity is further reduced, thereby further improving the relative airflow intensity entering the airflow pipeline 21 through the auxiliary air valve 22 and reducing the consumption of oxygen molecules on the oxygen-enriching element 32.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the textual descriptions and drawings of the above embodiments are exemplary and are intended to be used to explain the inventive concept of the present invention. They cannot be understood as limitations on the present invention. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. An adsorption device for a portable oxygen concentrator, comprising a portable housing (1) and an adsorption mechanism (3), wherein the portable housing (1) is provided with an air inlet through-hole (11) and an air outlet through-hole (12), the adsorption mechanism (3) comprises an oxygen enrichment element (32), the portable housing (1) is provided with an air supply pipe head (13), and an air flow pipeline (21) is connected between the oxygen enrichment element (32) and the air supply pipe head (13); It is characterized by: The device further comprises an air supply pump (2), the air supply pump (2) being located between the oxygen enrichment element (32) and the air supply pipe head (13), an auxiliary air pipe (221) and an auxiliary air valve (22), the auxiliary air valve (22) being located on the auxiliary air pipe (221), one end of the auxiliary air pipe (221) being connected to the air flow pipeline (21), and the connection point being located between the oxygen enrichment element (32) and the air supply pump (2), and a humidity sensor (15), the humidity sensor (15) being used to detect the humidity in the air flow pipeline (21).

2. The adsorption device for a portable oxygen concentrator according to claim 1, characterized in that: The oxygen-enriching element (32) comprises a support frame (322) and an oxygen-enriching membrane (321), wherein the oxygen-enriching membrane (321) and the support frame (322) are fixedly connected, an oxygen-enriched space (323) is formed in the support frame (322) through the oxygen-enriching membrane (321), the support frame (322) is fixedly connected to a support core (324), the support core (324) is located in the oxygen-enriched space (323), and a fixed pipe head (325) is fixedly connected to the support frame (322), one end of the fixed pipe head (325) is connected to the airflow pipeline (21), and the other end is connected to the oxygen-enriched space (323).

3. The adsorption device for a portable oxygen concentrator according to claim 2, characterized in that: There are a plurality of oxygen-enriching elements (32), and a plurality of support frames (322) are arranged in parallel. The fixed pipe heads (325) of the plurality of oxygen-enriching elements (32) are commonly connected to the same oxygen-enriching main air pipe (33). An airflow gap (34) is formed between two adjacent oxygen-enriching elements (32). The opening directions of the air inlet hole (11) and the air outlet hole (12) are parallel, and the oxygen-enriching element (32) is located between the air outlet hole (12) and the air inlet hole (11). The membrane surface of the oxygen-enriching membrane (321) is perpendicular to the arrangement direction of the plurality of oxygen-enriching elements (32) and is parallel to the opening direction of the air inlet hole (11). An air intake fan (31) is provided in the portable housing (1) and at the air inlet hole (11).

4. The adsorption device for a portable oxygen concentrator according to any one of claims 1 to 3, characterized in that: An air flow pressure stabilizing tank (23) is fixedly connected to the portable housing (1). The air flow pressure stabilizing tank (23) is connected to the air flow pipeline (21) between the air supply pipe head (13) and the air supply air pump (2). The air outlet of the air flow pressure stabilizing tank (23) is coaxial with the air supply pipe head (13).

5. The adsorption device for a portable oxygen concentrator according to claim 3, characterized in that: The support frames (322) located on both sides of the air gap (34) slide relatively close to or away from each other. The adsorption mechanism (3) also includes an adjustment component (4), and the adjustment component (4) is used to control the movement of the support frames (322). When the auxiliary air valve (22) is opened, the adjacent support frames (322) are in contact with each other.

6. The adsorption device for a portable oxygen concentrator according to claim 5, characterized in that: The adjustment assembly (4) includes an adjustment guide column (41), a pressure piece (43) and a matching spring (42). The adjustment guide column (41) and the portable housing (1) are relatively fixed. The length direction of the adjustment guide column (41) is parallel to the arrangement direction of the multiple support frames (322). The adjustment guide column (41) passes through the multiple support frames (322). The matching spring (42) is coaxially sleeved on the adjustment guide column (41). The two ends of the matching spring (42) are respectively connected to two adjacent support frames (322). The pressure piece (43) is used to apply a thrust to the support frame (322), and the direction of the thrust is parallel to the expansion and contraction direction of the matching spring (42).

7. The adsorption device for a portable oxygen concentrator according to claim 6, characterized in that: The number of the support frames (322) is three, the pressure member (43) is a pressure box (431), the pressure box (431) includes two connecting end plates (4311) and two force push rods (4312), the connecting end plates (4311) and the force push rods (4312) are fixedly connected, the connecting end plates (4311) and the support frame (322) located in the middle are rotatably connected, the rotation axis is perpendicular to the arrangement direction of the support frames (322), the length direction of the force push rods (4312) is parallel to the rotation axis of the connecting end plates (4311), the three support frames (322) are located between the two force push rods (4312), and the force push rods (4312) generate a thrust toward the wind gap (34) on the support frame (322) located at the edge.

8. The adsorption device for a portable oxygen concentrator according to claim 6 or 7, characterized in that: The oxygen-enriched main gas pipe (33) includes a rigid straight pipe portion (331) and a telescopic pipe portion (332). A single rigid straight pipe portion (331) is fixedly connected and communicated with a fixed pipe head (325) on a support frame (322). Two adjacent rigid straight pipe portions (331) are communicated via a telescopic pipe portion (332). The axial length of the telescopic pipe portion (332) is variable.

9. The adsorption device for a portable oxygen concentrator according to claim 7, characterized in that: The support frame (322) located in the middle is fixedly connected to the adjustment guide column (41), one end of the adjustment guide column (41) is rotatably connected to a mounting threaded barrel (411), and a mounting screw (14) is fixedly connected to the inner wall of the portable housing (1), and the mounting screw (14) and the mounting threaded barrel (411) are coaxially threadedly connected.

10. The adsorption device for a portable oxygen concentrator according to claim 9, characterized in that: The portable housing (1) is provided with a driving motor (45), and a connecting shaft (432) is fixedly connected to the connecting end plate (4311). The connecting shaft (432) is rotatably connected to the support frame (322) located in the middle. A matching sleeve (44) is coaxially slidably provided at one end of the connecting shaft (432) away from the support frame (322). A connecting spring (441) is connected between the matching sleeve (44) and the connecting shaft (432). The cross-sections of the output shaft of the driving motor (45) and the matching sleeve (44) are both non-circular. In a natural state, when the axes of the connecting shaft (432) and the output shaft of the driving motor (45) coincide, the matching sleeve (44) is sleeved on the output shaft of the driving motor (45).

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