Portable oxygen generator

Abstract

The invention relates to the technical field of oxygen generators, in particular to a portable oxygen generator which comprises a machine shell, an adsorption cavity, a fan bin, an air compressor bin and a battery bin are formed in the machine shell, and a three-cavity adsorption tower module is arranged in the adsorption cavity; one sides of the top ends and the bottom ends of the oxygen storage cavity and the two molecular sieve cavities are respectively communicated with corresponding interfaces, an upper gas path block and a lower gas path block which are connected with corresponding interfaces of the three-cavity adsorption tower module are respectively arranged in the adsorption cavity, and the two molecular sieve cavities are communicated with the oxygen storage cavity through gas inlet electromagnetic valves; an oxygen outlet communicated with the oxygen storage cavity is formed in one side of the upper air path block, and the oxygen storage cavity is communicated with the oxygen outlet through an air outlet electromagnetic valve; and one side and the top of the lower gas path block are respectively provided with a gas inlet and a nitrogen outlet which are respectively communicated with the two molecular sieve cavities. The whole structure is optimized, the air compressor is convenient to overhaul and maintain, the desorption efficiency of the molecular sieve can be improved, stable pulse gas output is provided for experiencers, and the design of a heat dissipation path enables equipment to operate stably.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen concentrators, in particular to a portable oxygen concentrator. Background Art

[0002] The oxygen concentrator uses physical pressure swing adsorption technology, using an air compressor to adsorb oxygen and nitrogen in the air through a molecular sieve to separate nitrogen and oxygen, thereby obtaining continuous high-concentration oxygen. Compared with conventional oxygen concentrators, portable pulse oxygen concentrators first use smaller air compressors, fans, adsorption towers and other components, making the overall volume smaller and easier to carry; secondly, because its components are smaller, its oxygen production capacity is correspondingly weakened, so it is necessary to detect the user's breathing so that it can output oxygen in a pulsed manner when inhaling, thereby improving oxygen utilization and achieving therapeutic effects.

[0003] As for the adsorption tower part of the portable oxygen generator, the replacement method is usually adopted to improve the adsorption and desorption effect of the molecular sieve. For example, the patent with the patent number "201911412898.2" discloses "a molecular sieve tank replacement structure for a portable oxygen generator". It is designed with two air inlets and an oxygen outlet on the top of the molecular sieve tank. It is divided into three cavities as a whole. The molecular sieves are filled on the left and right sides, and the middle is used as an oxygen storage chamber. The characteristic of this technology is that the left and right molecular sieve chambers are connected to the middle oxygen storage chamber on the inside of the bottom. The bottom can be designed with a flow blocking device. The adsorption and desorption cycle process is realized by switching the oxygen production solenoid valve, so as to continuously produce oxygen. However, this scheme still has the following defects: 1. Due to the small size of the molecular sieve of the portable oxygen generator, in order to maximize its oxygen production efficiency, it is necessary to quickly balance the pressure of the two adsorption chambers at the moment of switching between adsorption and desorption of the two molecular sieves, so as to quickly complete the desorption and improve the desorption efficiency. In the above scheme, the two molecular sieve outlet ends are fixedly connected to the internal oxygen outlet chamber, and no additional balancing valve can be added; 2. In order to ensure the stability of the pulsed gas output, it is necessary to control the oxygen inlet and outlet of the oxygen storage chamber to ensure the internal pressure is constant, but the oxygen storage chamber inlet in the above scheme cannot control the air inlet of the oxygen storage chamber. Therefore, for the portable pulse oxygen generator, its replaceable adsorption tower structure still needs to be optimized.

[0004] As for the air compressor part, the air compressor of the portable oxygen concentrator is different from that of the conventional oxygen concentrator and is smaller in size, so its fixing method is different from that of the conventional air compressor. Currently, the common portable oxygen concentrators on the market fix the air compressor by fixing the bottom and then installing the silent cover from top to bottom. This means that when the air compressor needs to be repaired or replaced, the components on the upper side of the silent cover need to be removed one by one before the silent cover can be removed for repair, resulting in unchanged operation. Therefore, there is still room for optimization in the fixing structure of the air compressor of the portable oxygen concentrator.

[0005] Regarding heat dissipation design, portable oxygen concentrators usually dissipate heat by providing airflow through a heat dissipation fan to bring the high-temperature gas generated inside to the outside of the machine. The main internal heat sources are the air compressor, electronic control board, solenoid valve and battery. The batteries of common portable oxygen concentrators on the market need to be designed to be detachable, and are generally designed to be fixed on the bottom by slide rails and snap-fits. The whole is equivalent to being located on the outside of the host. The heat generated is generally released naturally, which causes the battery to become hot after a long period of use, affecting the user experience. Therefore, there is still room for optimization of the heat dissipation structure of the built-in battery of the portable oxygen concentrator. Summary of the invention

[0006] In order to solve the above technical problems, the present invention specifically adopts the following technical solutions.

[0007] A portable oxygen concentrator is designed, comprising a casing, an adsorption chamber is provided on one side of the casing, and a fan compartment, an air compressor compartment, and a battery compartment are provided on the other side in order from top to bottom, a heat dissipation fan, an air compressor body, and a power supply battery are provided in the fan compartment, the air compressor compartment, and the battery compartment, respectively, a three-chamber adsorption tower module is provided in the adsorption chamber, the three-chamber adsorption tower module comprises two molecular sieve chambers and an oxygen storage chamber located between the two molecular sieve chambers, and an air outlet of the air compressor body is connected to an inlet of the molecular sieve chamber;

[0008] The tops of the oxygen storage chamber and the two molecular sieve chambers are respectively connected with upper interfaces, an upper gas path block fixed to the top of the casing is provided at the top of the adsorption chamber, upper docking interfaces corresponding to and sealingly matching the upper interfaces are respectively provided on the upper gas path blocks, a mounting port connected to the adsorption chamber is provided on one side of the casing, the three-chamber adsorption tower module is inserted in the adsorption chamber through the mounting port, an air inlet solenoid valve and an air outlet solenoid valve are respectively provided on the upper gas path block, the two molecular sieve chambers are connected to the oxygen storage chamber through the air inlet solenoid valve, an oxygen outlet connected to the oxygen storage chamber is provided on one side of the upper gas path block, and the oxygen storage chamber is connected to the oxygen outlet through the air outlet solenoid valve;

[0009] A lower gas circuit block fixed on the casing is provided on one side of the adsorption chamber, lower interfaces are respectively connected to the bottom ends of the two molecular sieve chambers, a lower docking interface corresponding to and sealingly matched with the lower interface is opened at the bottom of the lower gas circuit block, air inlets respectively connected to the two molecular sieve chambers are provided on one side of the lower gas circuit block, nitrogen exhaust ports respectively connected to the two molecular sieve chambers are provided on the top of the lower gas circuit block, and oxygen-generating solenoid valves installed on the lower gas circuit block are provided between the two molecular sieve chambers and the nitrogen exhaust port and the air inlet.

[0010] Preferably, a pressure detection port for detecting the pressure of the oxygen storage chamber is provided on the channel between the oxygen storage chamber and the air outlet solenoid valve on one side of the upper air circuit block, and a micro-pressure difference detection port for detecting the breathing state is provided on the channel between the air outlet solenoid valve and the oxygen outlet on one side of the upper air circuit block.

[0011] Preferably, the pressure detection port and the micro-pressure differential detection port are located on the same side, and a detection electronic control board is sealedly connected to the pressure detection port and the micro-pressure differential detection port, and a pressure sensor and a micro-pressure differential sensor are respectively provided on one side of the detection electronic control board, which are sealed corresponding to the pressure detection port and the micro-pressure differential detection port.

[0012] Preferably, a cover is provided at the bottom of the casing at the lower end of the adsorption chamber, and screws are provided on the cover, and the three-chamber adsorption tower module is fixed in the adsorption chamber by the screws on the cover.

[0013] Preferably, a shock-absorbing slot is provided at the bottom of the air compressor compartment, a shock-absorbing speaker pad is installed in the shock-absorbing slot, the air compressor body is arranged on the upper surface of the shock-absorbing speaker pad, and an air outlet silicone sleeve, an S-shaped expansion strip, and an I-shaped card-mounting block are connected to the air outlet of the air compressor body from bottom to top in sequence, and an I-shaped slot is provided at the bottom end of the fan compartment on one side of the heat dissipation fan, the card-mounting block is installed in the I-shaped slot, and the other end thereof is against the heat dissipation fan.

[0014] Preferably, a ventilation gap is left between the air compressor compartment and the inner wall of the casing, the ventilation gap is connected with the fan compartment, and an air inlet is provided above one end of the battery compartment, a filter block is provided at the air inlet, ventilation spaces are respectively provided in the air compressor compartment, the battery compartment and the fan compartment, and the air compressor compartment, the battery compartment and the fan compartment are all connected to each other, a lower air outlet and a side air outlet are respectively provided at the bottom of one side and the front and rear sides of the battery compartment, the heat dissipation fan allows external cold air to enter the ventilation gap, the fan compartment, the air compressor compartment and the battery compartment in turn from the air inlet, and discharges the hot air in the casing from the lower air outlet and the side air outlet.

[0015] Preferably, a disassembly and assembly port for installing the battery is provided at one end of the battery compartment, and a battery cover is provided on the housing at the disassembly and assembly port.

[0016] Preferably, the upper end of the battery cover is rotatably mounted on the casing, and micro-rebounders are respectively provided at the bottom of the two side walls of the disassembly and assembly port, and two column trapezoidal heads that are snap-fitted with the micro-rebounders are respectively provided on both sides of the lower end of the battery cover, and the air inlet is located between the upper end of the battery cover and the casing.

[0017] Preferably, a balancing valve is provided in the upper gas path block, and the two molecular sieve cavities are connected via the balancing valve.

[0018] Preferably, a front sponge and a tail sponge are respectively provided at both ends of the power supply battery, wherein the front sponge is located between the battery cover and the power supply battery to isolate the air inlet from the lower air outlet and the side air outlet, and the tail sponge is arranged between the inner wall of one side of the battery compartment and the power supply battery.

[0019] The beneficial effects of the present invention are:

[0020] 1. The three-chamber adsorption tower module of the present invention is easy to install through the installation port, convenient for inspection and maintenance, especially when there is no need to replace the air compressor, it only needs to remove the side panels and the bottom cover to operate, which greatly simplifies the maintenance process.

[0021] 2. The present invention realizes precise regulation of the oxygen storage chamber pressure and real-time monitoring of the breathing state through the solenoid valves (including air inlet and air outlet solenoid valves and a balancing valve) and precision sensors (pressure sensors and micro-pressure differential sensors) integrated in the upper and lower air path blocks, thereby ensuring the continuity and stability of the oxygen supply.

[0022] 3. The present invention adopts a built-in battery, which not only optimizes the appearance integration, but also realizes the rapid replacement and maintenance of the battery through the convenient battery disassembly and assembly port and the unique battery cover locking mechanism (equipped with a micro rebounder). At the same time, the built-in sponge design effectively improves the safe installation and thermal isolation performance of the battery.

[0023] 4. The present invention takes into account the thermal management of heat-generating components such as the air compressor body and power supply battery, and uses a heat dissipation fan to guide external cold air through the air inlet into the negative pressure ventilation path arranged in the casing, thereby effectively removing the internal heat of the casing through the lower air outlet and two side air outlets at the bottom of the casing, thereby maintaining the stability of the equipment during long-term operation.

[0024] 5. The present invention monitors the pressure of the oxygen storage chamber by detecting the pressure sensor on the electronic control panel, automatically adjusts the solenoid valve switch, and maintains the pressure of the oxygen storage chamber within a preset range, thereby providing a stable pulse gas output and optimizing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0027] Figure 3 It is a side structural schematic diagram of the present invention;

[0028] Figure 4 It is a schematic diagram of the installation structure of the air outlet silicone sleeve, S-shaped telescopic strip, and I-shaped card-mounting block;

[0029] Figure 5 It is to show the schematic diagram of the installation structure of the battery cover;

[0030] Figure 6 It is a schematic diagram of the structure of the battery cover and the micro rebounder cooperating to lock;

[0031] Figure 7 It is a structural diagram to show the installation position of the air inlet and the power supply battery;

[0032] Figure 8 It is a ventilation and heat dissipation path diagram of the cooling fan guiding the external cold air inside the casing;

[0033] Fig. 9 and Fig.10 It is a structural schematic diagram of a three-chamber adsorption tower module and a lower gas path block;

[0034] Fig.11 It is a schematic diagram of the structure of the electric control board and the upper gas path block;

[0035] Fig.12 It is a structural schematic diagram of the upper gas path block;

[0036] Fig.13 It is a schematic diagram of the internal channel layout structure of the lower gas path block;

[0037] Fig.14 It is a schematic diagram of the internal channel layout structure of the upper gas path block;

[0038] Fig.15 It is a working principle diagram of the present invention;

[0039] Fig.16 It is a working principle diagram of the user during the inhalation action;

[0040] Fig.17 It is a diagram of the working principle of the user during breathing action;

[0041] The numbers in the figure are: 1 oxygen outlet pipeline, 2 lower gas block, 201 oxygen solenoid valve, 202 air inlet, 203 lower docking port, 204 air inlet channel, 205 nitrogen exhaust channel, 206 nitrogen exhaust port, 3 casing, 4 upper gas block, 401 molecular sieve channel, 402 oxygen storage channel, 403 oxygen outlet channel, 404 oxygen channel, 405 pressure balance channel, 41 oxygen outlet, 42 air inlet solenoid valve, 43 balance valve, 44 air outlet solenoid valve, 45 upper docking port, 46 micro-pressure difference detection port, 47 pressure detection port, 48 electric control board fixing hole, 5 three-chamber adsorption tower module, 50 lower interface, 51 upper interface, 52 molecular sieve chamber, 53 oxygen storage chamber, 6 cover, 7 lower outlet Air vent, 8 side air outlet, 9 battery cover, 10 installation port, 11 air inlet, 12 ventilation gap, 13 air compressor body, 14 cooling fan, 15 air compressor outlet pipe, 16 pressure sensor, 17 electronic control board, 18 micro pressure difference sensor, 19 O-ring, 20 oxygen concentration sensor, 21 telescopic strip, 22 air outlet silicone sleeve, 23 shock-absorbing card slot, 24 shock-absorbing speaker pad, 25 adsorption chamber, 26 fan compartment, 27 battery compartment, 28 solenoid valve chamber, 29 air compressor compartment, 30 speaker pad pressing piece, 31 card mounting block, 32 slot, 33 power supply battery, 34 filter block, 35 micro rebounder, 36 column trapezoidal head, 37 front sponge, 38 tail sponge. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0043] Example 1

[0044] A portable oxygen concentrator, such as Figures 1 to 17 As shown, it includes a casing 3, an adsorption chamber 25 is provided on one side of the casing 3, and a fan compartment 26, an air compressor compartment 29, and a battery compartment 27 are provided on the other side from top to bottom. A heat dissipation fan 14, an air compressor body 13, and a power supply battery 33 are provided in the fan compartment 26, the air compressor compartment 29, and the battery compartment 27, respectively. The built-in battery can reduce the appearance requirements of the oxygen generator for the power supply battery 33, such as appearance defects such as color errors and color differences in coordination with the casing 3. A three-chamber adsorption tower module 5 is provided in the adsorption chamber 25. The three-chamber adsorption tower module 5 includes two molecular sieve chambers 52 and an oxygen storage chamber 53 located between the two molecular sieve chambers 52. The air outlet of the air compressor body 13 is connected to the inlet of the molecular sieve chamber 52.

[0045] After the compressed air enters the molecular sieve chamber 52 of the three-chamber adsorption tower module 5, impurities such as nitrogen in the air are adsorbed by the molecular sieve, and oxygen passes through the molecular sieve into the oxygen storage chamber 53. The two molecular sieve chambers 52 perform adsorption and desorption operations alternately, and when one molecular sieve chamber 52 is adsorbing, the other is desorbing.

[0046] The tops of the oxygen storage chamber 53 and the two molecular sieve chambers 52 are respectively connected with upper interfaces 51, and the top of the adsorption chamber 25 is provided with an upper gas path block 4 fixed to the top of the casing 3, and the upper gas path block 4 is respectively provided with upper docking ports 45 corresponding to and sealingly matched with the upper interfaces 51. A mounting port 10 connected to the adsorption chamber 25 is opened on one side of the casing 3, and a side panel is provided at the mounting port 10, which can be fixed to the casing 3 by bolts. When maintenance and debugging are required without replacing the air compressor body, it is only necessary to remove the side panel to see the air compressor body 13 and its pipelines, thereby facilitating operation. The three-chamber adsorption tower module 5 is inserted into the adsorption chamber 25 through the installation port 10, and an air inlet solenoid valve 42, an air outlet solenoid valve 44, and a balancing valve 43 are respectively provided on the upper gas path block 4. The two molecular sieve chambers 52 are connected to the oxygen storage chamber 53 through the air inlet solenoid valve 42. An oxygen outlet 41 connected to the oxygen storage chamber 53 is provided on one side of the upper gas path block 4, and the oxygen storage chamber 53 is connected to the oxygen outlet 41 through the air outlet solenoid valve 44.

[0047] A pressure detection port 47 for detecting the pressure of the oxygen storage chamber 53 is provided on the channel between the oxygen storage chamber 53 and the air outlet solenoid valve 44 on one side of the upper air path block 4, and a micro-pressure difference detection port 46 for detecting the breathing state is provided on the channel between the air outlet solenoid valve 44 and the oxygen outlet 41 on one side of the upper air path block 4. The pressure detection port 47 and the micro-pressure difference detection port 46 are located on the same side, and a detection electric control board 17 is sealed and connected at the pressure detection port 47 and the micro-pressure difference detection port, and a pressure sensor 16 and a micro-pressure difference sensor 18 are respectively provided on one side of the detection electric control board 17, which are sealed and matched with the pressure detection port 47 and the micro-pressure difference detection port 46.

[0048] Specifically, two molecular sieve channels 401 and an oxygen storage channel 402 corresponding to the three upper docking ports 45 are respectively arranged in parallel inside the upper gas path block 4, and two pressure balance channels 405 and an oxygen channel 404 perpendicular to the oxygen storage channel 402 are respectively arranged in the upper gas path block 4, and throttling holes are respectively arranged at both ends of the oxygen channel 404 between the two molecular sieve channels 401, and the two ends of the oxygen channel 404 are respectively connected to the two molecular sieve cavities 52, and the oxygen storage channel 402, the pressure balance channel 405 and the oxygen channel 404, and the two molecular sieve channels 401 are respectively arranged in layers in the thickness direction of the upper gas path block 4, and at one end of the two molecular sieve channels 401, and the pressure balance channel 405, the oxygen channel Both ends of 404 are respectively provided with plugs for blocking, the oxygen storage channel 402 is connected to the oxygen channel 404 through the air inlet solenoid valve 42, the pressure detection port 47 is connected to the oxygen storage channel 402, and the oxygen outlet channel 403 connected to the oxygen outlet 41 is connected to the oxygen storage channel 402 near the pressure detection port 47, and the oxygen outlet channel 403 is connected to the oxygen storage channel 402 through the air outlet solenoid valve 44, and the pressure balance channel 405 is respectively connected to the two molecular sieve channels 401 through the balance valve 43. The setting of the balance valve 43 can be opened briefly at the switching moment of the adsorption and desorption of the two molecular sieves to quickly balance the pressure in the two molecular sieve chambers 52, thereby effectively improving the desorption efficiency of the molecular sieve adsorption tower, and then improving the oxygen production efficiency. Among them, the balance valve 43, the air inlet solenoid valve 42, and the air outlet solenoid valve 44 are all miniature two-position two-way valves.

[0049] A lower gas circuit block 2 fixed on the casing 3 is provided on one side of the adsorption chamber 25, and lower interfaces 50 are respectively connected to the bottom ends of the two molecular sieve chambers 52, and a lower docking port 203 corresponding to and sealingly matched with the lower interface 50 is opened at the bottom of the lower gas circuit block 2, and an air inlet 202 respectively connected to the two molecular sieve chambers 52 is provided on one side of the lower gas circuit block 2, and a nitrogen exhaust port 206 respectively connected to the two molecular sieve chambers 52 is provided on the top of the lower gas circuit block 2, and an oxygen production solenoid valve 201 installed on the lower gas circuit block 2 is provided between the two molecular sieve chambers 52 and the nitrogen exhaust port 206 and the air inlet 202.

[0050] Specifically, an air intake channel 204 and a nitrogen exhaust channel 205 connected to the air intake port 202 and the nitrogen exhaust port 206 are respectively provided in the lower gas path block 2, and the two lower docking ports 203 are respectively connected to the air intake channel 204 and the nitrogen exhaust channel 205 through the oxygen production solenoid valve 201, and the oxygen production solenoid valve 201 is a two-position three-way valve.

[0051] A cover 6 is provided at the bottom of the casing 3 at the lower end of the adsorption chamber 25 , and screws are provided on the cover 6 . The three-chamber adsorption tower module 5 is fixed in the adsorption chamber 25 by the screws on the cover 6 .

[0052] The above gas circuit arrangement can facilitate the inspection, debugging and disassembly and assembly of the air compressor body 13 . The sealing connection between the upper docking port 45 and the upper port 51 and the lower docking port 203 and the lower port 50 can be achieved by using an O-ring 19 .

[0053] A shock-absorbing card slot 23 is provided at the bottom of the air compressor compartment 29, a shock-absorbing speaker pad 24 is clamped in the shock-absorbing card slot 23, the air compressor body 13 is arranged on the upper surface of the shock-absorbing speaker pad 24, and the air outlet of the air compressor body 13 is connected with an air outlet silicone sleeve 22, an S-shaped telescopic strip 21, and an I-shaped card block 31 in sequence from bottom to top, and a straight groove 32 is provided at the bottom end of the fan compartment 26 on one side of the heat dissipation fan 14, and the card block 31 is clamped in the straight groove 32, and the other end thereof abuts against the heat dissipation fan 14. When the air compressor needs to be replaced, only the heat dissipation fan 14 and the speaker pad pressing piece 30 need to be removed, and the air compressor body 13 can be taken out from the installation port 10, avoiding the removal of too many other components during maintenance, which improves the maintenance efficiency on the one hand, and avoids the hidden trouble caused by secondary disassembly on the other hand.

[0054] The air compressor body 13 works in the air compressor compartment 29 in the housing 3, compresses the external air, and then delivers it to the molecular sieve cavity 52 through the air outlet. The compressed air passes through the air outlet silicone sleeve 22, the S-shaped telescopic strip 21 and the clamping block 31, and is finally connected to the air compressor outlet next to the heat dissipation fan 14, ensuring the stability and flexibility of the air path connection.

[0055] A ventilation gap 12 is left between the air compressor compartment 29 and the inner wall of the casing 3, and the ventilation gap 12 is connected to the fan compartment 26, and an air inlet 11 is provided above one end of the battery compartment 27, and a filter block 34 is provided at the air inlet 11. Ventilation spaces are provided in the air compressor compartment 29, the battery compartment 27, and the fan compartment 26, respectively. The air compressor compartment 29, the battery compartment 27, and the fan compartment 26 are all connected to each other. A solenoid valve chamber 28 is provided below the air compressor compartment 29 and between the battery compartment 27 and the adsorption chamber 25. A lower air path block 2 is installed in the solenoid valve chamber 28, and the lower interface 50 extends The solenoid valve cavity 28 is sealed and docked with the lower docking port 203 on the lower air path block 2, and the solenoid valve cavity 28 is connected to the battery compartment 27, and the air compressor compartment 29 is connected to the solenoid valve cavity 28. A lower air outlet 77 and a side air outlet 8 are respectively provided at the bottom of one side and the front and rear sides of the battery compartment 27. The heat dissipation fan 14 allows external cold air to enter the ventilation gap 12, the fan compartment 26, the air compressor compartment 29, the solenoid valve cavity 28, and the battery compartment 27 from the air inlet 11 in sequence, and discharges the hot air in the casing 3 from the lower air outlet and the side air outlet 8, thereby ensuring the normal operating temperature of the equipment.

[0056] Furthermore, a disassembly opening for installing the battery is provided at one end of the battery compartment 27 , and a battery cover 9 is provided on the housing 3 at the disassembly opening.

[0057] Furthermore, the upper end of the battery cover 9 is rotatably mounted on the casing 3, and micro-rebounders 35 are respectively provided at the bottom of the two side walls of the disassembly and assembly port, and two column trapezoidal heads 36 that are snap-fitted with the micro-rebounders 35 are respectively provided on both sides of the lower end of the battery cover 9. They are stuck when pressed and bounce up when pressed again, thereby realizing the locking and bouncing of the battery cover 9. The air inlet 11 is located between the upper end of the battery cover 9 and the casing 3.

[0058] Furthermore, a front sponge 37 and a rear sponge 38 are respectively provided at both ends of the power supply battery 33, wherein the front sponge 37 is located between the battery cover 9 and the power supply battery 33 to isolate the air inlet 11 from the lower air outlet 77 and the side air outlet 8, and the rear sponge 38 is provided between the inner wall of one side of the battery compartment 27 and the power supply battery 33 to provide installation buffering for the power supply battery 33.

[0059] In the present invention, when the micro-pressure difference sensor 18 detects an inhalation action at the oxygen outlet 41, the air inlet solenoid valve 42 is closed, and the air outlet solenoid valve 44 is opened, and the oxygen in the oxygen storage chamber 53 passes through the air outlet solenoid valve 44 and the oxygen outlet 41 at one time, thereby meeting the user's oxygen inhalation needs; when the micro-pressure difference sensor 18 detects an exhalation action at the oxygen outlet 41, and the pressure sensor 16 detects that the pressure in the oxygen storage chamber 53 is insufficient, the air inlet solenoid valve 42 of the oxygen storage chamber 53 is opened, and the air outlet solenoid valve 44 of the oxygen storage chamber 53 is closed. The oxygen produced after adsorption and filtration in the molecular sieve chamber 52 enters the oxygen storage chamber 53, thereby replenishing oxygen for the oxygen storage chamber 53, so that the pressure of the oxygen storage chamber 53 increases until it reaches a preset value; when the pressure of the oxygen storage chamber 53 is higher than the preset value, the air inlet solenoid valve 42 is closed, and the oxygen produced by the molecular sieve chamber 52 in the adsorption state is completely used for desorption operation in another molecular sieve chamber 52, thereby ensuring the stability of the pressure in the oxygen storage chamber 53, and then achieving a more stable pulse gas output, thereby improving the performance of the whole machine and further enhancing the user experience.

[0060] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable oxygen concentrator, characterized in that: The invention comprises a casing, wherein an adsorption chamber is provided on one side of the casing, and a fan compartment, an air compressor compartment, and a battery compartment are provided on the other side in order from top to bottom, wherein a heat dissipation fan, an air compressor body, and a power supply battery are provided in the fan compartment, the air compressor compartment, and the battery compartment, respectively, and a three-chamber adsorption tower module is provided in the adsorption chamber, wherein the three-chamber adsorption tower module comprises two molecular sieve chambers and an oxygen storage chamber located between the two molecular sieve chambers, and an air outlet of the air compressor body is connected to an inlet of the molecular sieve chamber; The tops of the oxygen storage chamber and the two molecular sieve chambers are respectively connected with upper interfaces, an upper gas path block fixed to the inner top wall of the casing is provided at the top of the adsorption chamber, and upper docking interfaces corresponding to and sealingly matching the upper interfaces are respectively provided on the upper gas path blocks, and a mounting port connected to the adsorption chamber is opened on one side of the casing, and the three-chamber adsorption tower module is inserted in the adsorption chamber through the mounting port, and an air inlet solenoid valve and an air outlet solenoid valve are respectively provided on the upper gas path block, the two molecular sieve chambers are connected to the oxygen storage chamber through the air inlet solenoid valve, an oxygen outlet connected to the oxygen storage chamber is provided on one side of the upper gas path block, and the oxygen storage chamber is connected to the oxygen outlet through the air outlet solenoid valve; A lower gas circuit block fixed on the casing is provided on one side of the adsorption chamber, lower interfaces are respectively connected to the bottom ends of the two molecular sieve chambers, a lower docking interface corresponding to and sealingly matched with the lower interface is opened at the bottom of the lower gas circuit block, air inlets respectively connected to the two molecular sieve chambers are provided on one side of the lower gas circuit block, nitrogen exhaust ports respectively connected to the two molecular sieve chambers are provided on the top of the lower gas circuit block, and oxygen-generating solenoid valves installed on the lower gas circuit block are provided between the two molecular sieve chambers and the nitrogen exhaust port and the air inlet.

2. The portable oxygen concentrator according to claim 1, characterized in that: A pressure detection port for detecting the pressure of the oxygen storage chamber is provided on a channel between the oxygen storage chamber and the air outlet solenoid valve on one side of the upper air path block, and a micro-pressure difference detection port for detecting the breathing state is provided on a channel between the air outlet solenoid valve and the oxygen outlet on one side of the upper air path block.

3. The portable oxygen concentrator according to claim 2, characterized in that: The pressure detection port and the micro-pressure differential detection port are located on the same side, and a detection electronic control board is sealed and connected at the pressure detection port and the micro-pressure differential detection port. A pressure sensor and a micro-pressure differential sensor are respectively provided on one side of the detection electronic control board, which are sealed and matched with the pressure detection port and the micro-pressure differential detection port.

4. The portable oxygen concentrator according to claim 1, characterized in that: A cover is provided at the bottom of the casing at the lower end of the adsorption chamber, and screws are provided on the cover. The three-chamber adsorption tower module is fixed in the adsorption chamber by the screws.

5. The portable oxygen concentrator according to claim 1, characterized in that: A shock-absorbing slot is provided at the bottom of the air compressor compartment, a shock-absorbing speaker pad is provided in the shock-absorbing slot, the air compressor body is provided on the upper surface of the shock-absorbing speaker pad, an air outlet silicone sleeve, an S-shaped telescopic strip, and an I-shaped card-mounting block are sequentially connected to the air outlet of the air compressor body from bottom to top, a straight slot is provided at one side of the heat dissipation fan at the bottom end of the fan compartment, the card-mounting block is card-mounted in the straight slot, and the other end thereof is against the heat dissipation fan.

6. The portable oxygen concentrator according to claim 1, characterized in that: A ventilation gap is left between the air compressor compartment and the inner wall of the casing, the ventilation gap is connected with the fan compartment, and an air inlet is provided above one end of the battery compartment, a filter block is provided at the air inlet, ventilation spaces are respectively provided in the air compressor compartment, the battery compartment and the fan compartment, and the air compressor compartment, the battery compartment and the fan compartment are all connected to each other, a lower air outlet and a side air outlet are respectively provided at the bottom of one side and the front and rear sides of the battery compartment, the heat dissipation fan allows external cold air to enter the ventilation gap, the fan compartment, the air compressor compartment and the battery compartment in turn from the air inlet, and discharges the hot air in the casing from the lower air outlet and the side air outlet.

7. The portable oxygen concentrator according to claim 6, characterized in that: A disassembly and assembly opening for installing the battery is provided at one end of the battery compartment, and a battery cover is provided on the housing at the disassembly and assembly opening.

8. The portable oxygen concentrator according to claim 7, characterized in that: The upper end of the battery cover is rotatably mounted on the casing, and micro-rebounders are respectively provided at the bottom of the two side walls of the disassembly and assembly port, and two column trapezoidal heads that are snap-fitted with the micro-rebounders are respectively provided on both sides of the lower end of the battery cover, and the air inlet is located between the upper end of the battery cover and the casing.

9. The portable oxygen concentrator according to claim 1, characterized in that: A balancing valve is arranged in the upper gas path block, and the two molecular sieve cavities are connected through the balancing valve.

10. The portable oxygen concentrator according to claim 7, characterized in that: A front sponge and a tail sponge are respectively provided at both ends of the power supply battery, wherein the front sponge is located between the battery cover and the power supply battery to isolate the air inlet from the lower air outlet and the side air outlet, and the tail sponge is arranged between the inner wall of one side of the battery compartment and the power supply battery.

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