阅读说明：本技术 便携式制氧机 (Portable oxygen generator ) 是由 王超 于 2021-03-12 设计创作，主要内容包括：一种便携式制氧机,包括：机箱；设置在机箱内的第一分子筛吸附塔和第二分子筛吸附塔；以及设置在机箱内的反吹阀,其包括阀体和电控件,阀体上设有：用于与第一分子筛吸附塔的出口连接的第一进气孔和与第二分子筛吸附塔的出口连接的第二进气孔；分别与第一进气孔和第二进气孔连通的第一反吹通道和第二反吹通道,电控件控制第一反吹通道和第二反吹通道之间的通断；以及分别与第一进气孔和第二进气孔连通的出气孔。本发明通过反吹阀的设计,能够利用其中一个分子筛吸附塔输出的氧气对另一个分子筛吸附塔进行增压,便于其氮气排出,通过电控件精确控制第一反吹通道和第二反吹通道之间的通断的时机,实现交替反吹操作,提高分子筛吸附塔的工作效率。(A portable oxygen generator comprising: a chassis; the first molecular sieve adsorption tower and the second molecular sieve adsorption tower are arranged in the case; and the blowback valve is arranged in the case and comprises a valve body and an electric control part, wherein the valve body is provided with: the first air inlet is connected with the outlet of the first molecular sieve adsorption tower, and the second air inlet is connected with the outlet of the second molecular sieve adsorption tower; the electric control part controls the connection and disconnection between the first back-blowing channel and the second back-blowing channel; and air outlet holes respectively communicated with the first air inlet hole and the second air inlet hole. According to the invention, through the design of the back flushing valve, the oxygen output by one molecular sieve adsorption tower can be utilized to pressurize the other molecular sieve adsorption tower, so that the nitrogen can be conveniently discharged, the on-off time between the first back flushing channel and the second back flushing channel is accurately controlled through the electric control part, the alternate back flushing operation is realized, and the working efficiency of the molecular sieve adsorption tower is improved.)

1. A portable oxygen generator, comprising:

a chassis;

a power supply assembly disposed within the chassis;

the first molecular sieve adsorption tower and the second molecular sieve adsorption tower are arranged in the case; and

the setting is in blowback valve in the quick-witted case, it includes valve body and electric control, be equipped with on the valve body:

the first air inlet is connected with the outlet of the first molecular sieve adsorption tower, and the second air inlet is connected with the outlet of the second molecular sieve adsorption tower;

the electric control controls the on-off of the first back blowing channel and the second back blowing channel; and

and the air outlet holes are respectively communicated with the first air inlet hole and the second air inlet hole.

2. The portable oxygen generator as claimed in claim 1, wherein the valve body of the back flushing valve is further provided with:

the first air outlet channel is communicated between the first air inlet hole and the air outlet hole; and

the second air outlet channel is communicated between the second air inlet hole and the air outlet hole;

a one-way valve assembly is arranged on the first air outlet channel, so that air flows from the first air inlet hole to the air outlet hole in a one-way mode; and a one-way valve assembly is arranged on the second air outlet channel, so that the air flows from the second air inlet hole to the air outlet hole in a one-way mode.

3. The portable oxygen generator of claim 1, wherein the power supply assembly is disposed at the bottom of the case and comprises:

the battery box body and the battery box cover are mutually covered;

the battery support is arranged in the battery box body, and is provided with a plurality of support sheets which extend longitudinally and are parallel to each other and a plurality of arched structures which are arranged below the support sheets and extend transversely;

a battery pack disposed within the arch of the battery support;

a battery motherboard disposed on the battery pack.

4. The portable oxygen generator as claimed in any one of claims 1 to 3, further comprising a compressor and a pilot valve connected to the outlet of the compressor, the inlet of the first molecular sieve adsorption tower and the inlet of the second molecular sieve adsorption tower respectively, for supplying air to the first molecular sieve adsorption tower and the second molecular sieve adsorption tower and discharging nitrogen.

5. The portable oxygen generator as claimed in claim 4, further comprising a nitrogen discharge muffler connected to the nitrogen discharge port of the pilot valve, an oxygen storage tank connected to the air outlet of the blowback valve, and an oxygen sensor for detecting the oxygen concentration in the oxygen storage tank.

6. The portable oxygen generator as claimed in claim 5, further comprising an oxygen-saving valve connected to the outlet of the oxygen storage tank, an oxygen-saving controller connected to the oxygen-saving valve, and a pressure sensor for detecting the vacuum degree generated by inhalation of a user, wherein the oxygen-saving controller is configured to control the on/off of the oxygen-saving valve according to the detection value of the pressure sensor, or to control the on/off of the oxygen-saving valve according to a fixed frequency.

7. The portable oxygen generator as claimed in claim 6, further comprising an upper bracket disposed at an upper portion of the cabinet, and a lower bracket disposed at a lower portion of the cabinet; the compressor is arranged in the middle of the lower support, the first molecular sieve adsorption tower and the second molecular sieve adsorption tower are respectively arranged on the lower support and located on two sides of the lower support, the upper support is respectively erected on the first molecular sieve adsorption tower and the second molecular sieve adsorption tower through two sides of the upper support, and the pilot valve, the oxygen-saving valve and the oxygen-saving controller are arranged on the upper support.

8. The portable oxygen generator as claimed in claim 7, further comprising a liner casing, wherein the bottom of the liner casing is open and mounted on the lower frame, and a fan is further disposed at the bottom of the lower frame for dissipating heat inside the liner casing; the compressor is arranged in the inner container shell.

9. The portable oxygen generator of claim 8, further comprising a spring shock absorber disposed on the lower bracket, the compressor being disposed on the spring shock absorber.

10. The portable oxygen generator as claimed in claim 8, wherein the oxygen storage tank and the nitrogen discharging muffler are respectively provided on both side shoulders of the inner container case.

Technical Field

The invention relates to a portable oxygen generator.

Background

Most of the oxygen generators in the market adopt a Pressure Swing Adsorption (PSA) method to prepare oxygen, and the principle is to separate gas mixtures by utilizing the difference of adsorption performance of molecular sieves on different gas molecules. The method takes air as a raw material, and separates nitrogen and oxygen in the air by utilizing the selective adsorption performance of a high-efficiency and high-selectivity solid adsorbent on the nitrogen and the oxygen. In the prior art, the work efficiency of the oxygen generator is low, and the effect is not good.

Disclosure of Invention

According to an aspect of the present invention, there is provided a portable oxygen generator comprising:

a chassis;

a power supply assembly disposed within the chassis;

the first molecular sieve adsorption tower and the second molecular sieve adsorption tower are arranged in the case; and

the blowback valve of setting in quick-witted incasement, it includes valve body and automatically controlled piece, is equipped with on the valve body:

the first air inlet is connected with the outlet of the first molecular sieve adsorption tower, and the second air inlet is connected with the outlet of the second molecular sieve adsorption tower;

the electric control part controls the connection and disconnection between the first back-blowing channel and the second back-blowing channel; and

and the air outlet holes are respectively communicated with the first air inlet hole and the second air inlet hole.

According to the portable oxygen generator, through the design of the back flushing valve, oxygen output by one molecular sieve adsorption tower can be used for pressurizing the other molecular sieve adsorption tower, so that nitrogen can be conveniently discharged, the on-off time between the first back flushing channel and the second back flushing channel is accurately controlled through the electric control part, the alternate back flushing operation is realized, the working efficiency of the molecular sieve adsorption tower is improved, and the nitrogen discharging and oxygen generating effects are improved.

In some embodiments, the valve body of the blowback valve is further provided with:

the first air outlet channel is communicated between the first air inlet hole and the air outlet hole; and

the second air outlet channel is communicated between the second air inlet hole and the air outlet hole;

the first air outlet channel is provided with a one-way valve assembly, so that air flows from the first air inlet hole to the air outlet hole in a one-way mode; and a one-way valve assembly is arranged on the second air outlet channel, so that the air flows from the second air inlet hole to the air outlet hole in a one-way mode.

In some embodiments, the power supply assembly is disposed at a bottom of the chassis, and includes:

the battery box body and the battery box cover are mutually covered;

the battery support is arranged in the battery box body, and is provided with a plurality of support sheets which extend longitudinally and are parallel to each other and a plurality of arch structures which are arranged below the support sheets and extend transversely;

a battery pack disposed within the arch of the battery support;

a battery main board disposed on the battery pack.

In some embodiments, the portable oxygen generator further comprises a compressor and a pilot valve, wherein the pilot valve is respectively connected with an outlet of the compressor, an inlet of the first molecular sieve adsorption tower and an inlet of the second molecular sieve adsorption tower, and is used for providing air for the first molecular sieve adsorption tower and the second molecular sieve adsorption tower and discharging nitrogen.

In some embodiments, the portable oxygen generator further comprises a nitrogen discharge muffler connected to the nitrogen discharge port of the pilot valve, an oxygen storage tank connected to the air outlet of the blowback valve, and an oxygen sensor for detecting the oxygen concentration in the oxygen storage tank.

In some embodiments, the portable oxygen generator further comprises an oxygen-saving valve connected to the outlet of the oxygen storage tank, an oxygen-saving controller connected to the oxygen-saving valve, and a pressure sensor for detecting a vacuum degree generated by inhalation of a user, wherein the oxygen-saving controller is configured to control the on/off of the oxygen-saving valve according to a detection value of the pressure sensor, or to control the on/off of the oxygen-saving valve according to a fixed frequency.

In some embodiments, the portable oxygen generator further comprises an upper bracket arranged at the upper part of the case, and a lower bracket arranged at the lower part of the case; the compressor is arranged in the middle of the lower support, the first molecular sieve adsorption tower and the second molecular sieve adsorption tower are respectively arranged on the lower support and positioned on two sides of the lower support, the upper support is respectively erected on the first molecular sieve adsorption tower and the second molecular sieve adsorption tower through two sides of the upper support, and the pilot valve, the oxygen-saving valve and the oxygen-saving controller are arranged on the upper support.

In some embodiments, the portable oxygen generator further comprises a liner shell, the bottom of the liner shell is open and is mounted on the lower support, and the bottom of the lower support is further provided with a fan for dissipating heat inside the liner shell; the compressor is arranged in the inner container shell.

In some embodiments, the portable oxygen generator further comprises a spring damping device disposed on the lower bracket, and the compressor is disposed on the spring damping device.

In some embodiments, the oxygen tank and the nitrogen discharge muffler are respectively provided on both side shoulders of the liner case.

Drawings

FIG. 1 is a schematic diagram of a portable oxygen generator according to some embodiments of the present invention;

FIG. 2 is a schematic view of the internal structure of a portable oxygen generator according to some embodiments of the present invention (with the cabinet removed);

FIG. 3 is a schematic view of the internal structure of a portable oxygen generator according to some embodiments of the present invention (with the front housing of the case and the inner container removed);

FIG. 4 is a schematic diagram of a blowback valve according to some embodiments of the present invention;

FIG. 5 is a cross-sectional view of a blowback valve according to some embodiments of the present invention;

FIG. 6 is a schematic diagram of the structure of a power module according to some embodiments of the present invention;

FIG. 7 is a schematic view of the internal structure of a portable oxygen generator according to some embodiments of the present invention, viewed from the back (with the cabinet removed);

FIG. 8 is a schematic view of the internal structure of a portable oxygen generator according to some embodiments of the present invention, as viewed from the back (with the cabinet and circuit board removed);

FIG. 9 is a schematic structural view of a bladder shell according to some embodiments of the present invention;

FIG. 10 is a schematic structural view of the liner shell according to some embodiments of the present invention, as viewed from the back;

FIG. 11 is a schematic structural view of an upper brace according to some embodiments of the present invention;

FIG. 12 is a schematic structural view from the back of an upper rack according to some embodiments of the present invention;

FIG. 13 is a schematic structural view of a lower support according to some embodiments of the present invention;

fig. 14 is a schematic structural view of a lower bracket according to some embodiments of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1-3 schematically show a portable oxygen generator according to some embodiments of the present invention, which comprises a case 1, and an oxygen generation and delivery module, a power supply assembly 3, a nitrogen discharge muffler 4, an oxygen concentration sensor 5, an internal support, a liner housing 7, a fan 8, a spring damping device 9 and a circuit board 10, which are arranged in the case 1, wherein the oxygen generation and delivery module comprises a compressor 21, a pilot valve 22, a molecular sieve adsorption tower, a blowback valve 24, an oxygen storage tank 25 and an oxygen saving valve 26, which are connected in sequence, and an oxygen saving controller and a pressure sensor.

The molecular sieve adsorption tower includes a first molecular sieve adsorption tower 231 and a second molecular sieve adsorption tower 232 connected in parallel. The pilot valve 22 is connected to the outlet of the compressor 21, the inlet of the first molecular sieve adsorption tower 231, the inlet of the second molecular sieve adsorption tower 232, and the nitrogen discharge muffler 4, respectively. Air is alternately sent to the first molecular sieve adsorption tower 231 and the second molecular sieve adsorption tower 232 for adsorption by the compressor 21. The nitrogen gas alternately discharged from the first molecular sieve adsorption tower 231 and the second molecular sieve adsorption tower 232 is delivered to the nitrogen discharge muffler 4 through the nitrogen discharge port of the pilot valve 22, and is discharged after being noise-reduced.

Referring to fig. 4-5, the blowback valve 24 is connected to the outlet of the first molecular sieve adsorption tower 231, the outlet of the second molecular sieve adsorption tower 232, and the oxygen storage tank 25, respectively. Firstly, air is introduced into an inlet of the first molecular sieve adsorption tower 231, nitrogen is adsorbed in the molecular sieve, after adsorption is completed, oxygen is output from an outlet of the first molecular sieve adsorption tower 231, a part of oxygen is directly output to the oxygen storage tank 25 through the blowback valve 24, a part of oxygen is blowback into the second molecular sieve adsorption tower 232 through the blowback valve 24, nitrogen in the molecular sieve of the second molecular sieve adsorption tower 232 is removed by air pressure pressurization, and the nitrogen is discharged to the pilot valve 22 from an inlet of the second molecular sieve adsorption tower 232. After the completion, the air is let in to the entry of second molecular sieve adsorption tower 232, nitrogen gas is adsorbed in the molecular sieve, adsorb the back, oxygen is from the export output of second molecular sieve adsorption tower 232, partly oxygen directly exports oxygen storage tank 25 through blowback valve 24, partly oxygen is in first molecular sieve adsorption tower 231 through blowback valve 24 is anti-blowd in, nitrogen gas in the molecular sieve of first molecular sieve adsorption tower 231 is deviate from through atmospheric pressure boost help, and discharge to pilot valve 22 from the entry of first molecular sieve adsorption tower 231, so alternate circulation, make oxygen and arrange nitrogen.

Specifically, the blowback valve 24 includes a valve body 241, an electrical control 242, and valve connections including a first valve connection 2431, a second valve connection 2432, and a third valve connection 2433. The valve body 241 is provided with a first air inlet 2411 connected with the outlet of the first molecular sieve adsorption tower 231 and a second air inlet 2412 connected with the outlet of the second molecular sieve adsorption tower 232, and the first valve joint 2431 and the second valve joint 2432 are respectively arranged on the first air inlet 2411 and the second air inlet 2412 so as to be connected with a connecting pipeline. The valve body 241 is further provided with a first back-blowing channel 2414 and a second back-blowing channel 2415 which are respectively communicated with the first air inlet hole 2411 and the second air inlet hole 2412, and the electric control part 242 is used for controlling the on-off of the first back-blowing channel 2414 and the second back-blowing channel 2415. For example, the electronic control element 242 may control the valve element to move through electromagnetic induction to switch on and off the first back-blowing channel 2414 and the second back-blowing channel 2415, so as to communicate or close the first air inlet 2411 and the second air inlet 2412, and the electronic control element 242 may also control the timing and duration of the communication, so as to control the timing and duration of the back-blowing of oxygen. The valve body 241 is further provided with an air outlet 2413, a first air outlet channel 2416, a second air outlet channel 2417 and a third air outlet channel 2418, wherein a third valve joint 2433 is arranged on the air outlet 2413 so as to be connected with an inlet of an air storage tank through a connecting pipeline. The third air outlet channel 2418 is communicated with the air outlet 2413, the front end of the first air outlet channel 2416 is communicated with the first air inlet hole 2411, the tail end of the first air outlet channel 2416 is communicated with the third air outlet channel 2418, the front end of the second air outlet channel 2417 is communicated with the second air inlet hole 2412, and the tail end of the second air outlet channel 2417 is communicated with the third air outlet channel 2418. The first air outlet channel 2416 is further provided with a one-way valve assembly 2419, so that air flows from the first air inlet hole 2411 to the air outlet hole 2413 in a one-way manner, and the second air outlet channel 2417 is also provided with the one-way valve assembly 2419, so that air flows from the second air inlet hole 2412 to the air outlet hole 2413 in a one-way manner. The check valve assembly 2419 includes a movable valve plate disposed on the first air outlet channel 2416 or the second air outlet channel 2417, and a spring for returning the movable valve plate. In some embodiments, the first air inlet hole 2411 and the second air inlet hole 2412 are coaxially disposed, and the third air outlet channel 2418 is disposed in parallel with the first air inlet hole 2411 and the second air inlet hole 2412; the first back-blowing channel 2414, the second back-blowing channel 2415, the first air outlet channel 2416, the second air outlet channel 2417 and the air outlet 2413 are parallel to each other and are all perpendicular to the first air inlet hole 2411, the second air inlet hole 2412 and the third air outlet channel 2418.

When the back-blowing valve 24 works, when oxygen is output to the first air inlet 2411 from the outlet of the first molecular sieve adsorption tower 231, the electric control 242 controls the first back-blowing channel 2414 to be communicated with the second back-blowing channel 2415, a part of the oxygen enters the second air inlet 2412 through the first back-blowing channel 2414 and the second back-blowing channel 2415, so as to be reversely blown into the outlet of the second molecular sieve adsorption tower 232, after the back-blowing is finished, the electric control 242 controls the first back-blowing channel 2414 to be disconnected from the second back-blowing channel 2415, and the other part of the oxygen flows in a single direction through the first air outlet channel 2416, and after flowing through the third air outlet channel 2418, the oxygen is output to the oxygen storage tank 25 through the air outlet 2413. On the contrary, similarly, when the oxygen is output from the outlet of the second molecular sieve adsorption tower 232 to the second air inlet 2412, the electric control 242 controls the first back-blowing channel 2414 to communicate with the second back-blowing channel 2415, a part of the oxygen enters the first air inlet 2411 through the first back-blowing channel 2414 and the second back-blowing channel 2415, so as to be back-blown into the outlet of the first molecular sieve adsorption tower 231, after the back-blowing is finished, the electric control 242 controls the first back-blowing channel 2414 to disconnect from the second back-blowing channel 2415, and another part of the oxygen flows in a single direction through the second air outlet channel 2417, and after flowing through the third air outlet channel 2418, the oxygen is output to the oxygen storage tank 25 through the air outlet 2413.

This economize on oxygen valve 26 and the exit linkage of gas holder, this economize on oxygen valve 26 is used for controlling the output of oxygen, this economize on oxygen controller is connected with economize on oxygen valve 26 electricity, this pressure sensor is used for detecting that the user breathes in and produces the vacuum, the economize on oxygen controller sets up to switch between two kinds of modes, under automatic mode, the economize on oxygen controller can be according to pressure sensor's detected value control economize on oxygen valve 26's break-make, make the output of oxygen automatically adapt to user's respiratory frequency, under the fixed frequency mode, the economize on oxygen controller can be according to the break-make of fixed frequency control economize on oxygen valve 26, make oxygen output with preset frequency.

Referring to fig. 2, the oxygen concentration sensor 5 is used to detect the oxygen concentration in the oxygen tank 25.

Referring to fig. 6, the power module 3 includes a battery case 31, a battery case cover 32, a battery holder 33, a battery pack 34, and a battery main board 35. The battery case body 31 and the battery case cover 32 are fitted to each other. The battery holder 33 is disposed in the battery case 31, the battery holder 33 is provided with a plurality of holder pieces 331 extending in a longitudinal direction and parallel to each other, and a plurality of arch structures 332 extending in a transverse direction and disposed below the holder pieces 331, and the battery pack 34 is disposed in the arch structures 332. The battery main board 35 is provided on the battery pack 34.

Referring to fig. 9-10, the inner shell 7 is used for placing the compressor 21 to reduce noise. The inner container shell 7 comprises an inner container front shell 71 and an inner container rear shell 72 which are mutually covered front and rear. At least two corresponding sets of concave parts 73, in this embodiment four sets, are respectively provided at the edges of the liner front shell 71 and the liner rear shell 72, and the bottom surfaces of the concave parts 73 are provided with first mounting holes 74, and the first mounting holes 74 are used for passing through bolts to fix the liner front shell 71 and the liner rear shell 72 to each other. The bottoms of the inner container front shell 71 and the inner container rear shell 72 are open, the bottom surfaces of the inner container front shell and the inner container rear shell are provided with eighth mounting holes 715 for connecting with the lower support 62, and the inner container shell 7 is connected with the lower support 62, so that the heat dissipation inside the inner container shell 7 is realized through the fan 8 arranged below the lower support 62. The front end surface of the liner front case 71 is provided with a second mounting hole 75 for fixing the oxygen concentration sensor 5. The front end surface of the inner container front shell 71 and the rear end surface of the inner container rear shell 72 are formed with arc surfaces 714 corresponding to the outer shell of the compressor 21 so as to adapt to the shape of the compressor 21 and facilitate the installation of the compressor 21. Two shoulders of the inner container front shell 71 and the inner container rear shell 72 are respectively provided with a first step 712 and a second step 713 which are sunken inwards, the first step 712 is used for installing the oxygen storage tank 25, and the second step 713 is used for installing the nitrogen discharging silencer 4. The top surfaces of the inner container front shell 71 and the inner container rear shell 72 are provided with third mounting holes 76 for passing through a connecting pipeline between the compressor 21 and the pilot valve 22. The top of the inner container rear case 72 is also provided with an air inlet hole 711 for heat dissipation. The inner container rear shell 72 is also provided with a fourth mounting hole 77 for a nitrogen exhaust pipeline to extend into, the front end of the nitrogen exhaust pipeline is connected with an outlet of the nitrogen exhaust silencer 4, and the tail end of the nitrogen exhaust pipeline extends into the inner container shell 7 to exhaust nitrogen through the fan 8 at the bottom of the inner container shell 7. The bottom center of the rear end face of the liner rear shell 72 is also provided with a fifth mounting hole 78 for exhausting air from the air outlet 2413 of the blowback valve 24. The inner container rear case 72 is further provided with sixth mounting holes 79 on both sides of the bottom of the rear end surface thereof for mounting the circuit board 10. The front shell 71 of the inner container and two side surfaces of the rear side of the inner container are respectively provided with a seventh mounting hole 710 for a connecting pipeline between outlets of the first molecular sieve adsorption tower 231 and the second molecular sieve adsorption tower 232 and the blowback valve 24 to pass through.

The inner support includes an upper support 61 and a lower support 62. Referring to fig. 11 to 12, first steps 611 are symmetrically disposed on left and right sides of the upper support 61, and are respectively configured to be disposed on the first molecular sieve adsorption tower 231 and the second molecular sieve adsorption tower 232, and first connection holes 613 are disposed on the first steps 611, and are respectively configured to mount the upper support 61 on the first molecular sieve adsorption tower 231 and the second molecular sieve adsorption tower 232. The left side and the right side of the upper bracket 61 are also respectively provided with a first groove 619 for the connection pipeline between the pilot valve 22 and the first molecular sieve adsorption tower 231 and the second molecular sieve adsorption tower 232 to pass through. The middle part of the upper bracket 61 is symmetrically provided with a second step 612 which is respectively used for being arranged on the oxygen storage tank 25 and the nitrogen discharging muffler 4, and the second step 612 is provided with a second connecting hole 614 which is respectively used for installing the upper bracket 61 on the oxygen storage tank 25 and the nitrogen discharging muffler 4. The center of the upper bracket 61 is also provided with a third connecting hole 615 for mounting the pilot valve 22. The center of the upper bracket 61 is also provided with a fourth connection hole 616 for passing through a connection pipe between the pilot valve 22 and the nitrogen discharge muffler 4. The front edge of the center of the upper bracket 61 is also vertically provided with a first blocking piece 6110, and the first blocking piece 6110 is provided with a fifth connecting hole 617 for installing the oxygen-saving valve 26. The rear edges of the left and right sides of the upper bracket 61 are also vertically provided with second baffles 6111, and the second baffles 6111 are provided with sixth connecting holes 618 for mounting the circuit board 10. Referring to fig. 13 to 14, the lower bracket 62 is provided with a seventh connecting hole 621 for mounting the fan 8, and a circulation hole 628 for circulating air through the fan 8. The lower bracket 62 is further provided with an eighth connecting hole 622 for mounting the liner case 7, and a ninth connecting hole 623 for mounting the first molecular sieve adsorption tower 231 and the second molecular sieve adsorption tower 232, respectively. The lower bracket 62 is further provided with a tenth connecting hole 624 for mounting the spring damper 9 and an eleventh connecting hole 625 for mounting the blowback valve 24. A third blocking piece 627 is vertically arranged at the rear edge of the lower bracket 62, and a twelfth connecting hole 626 for installing the circuit board 10 is arranged on the third blocking piece 627.

When the whole machine is assembled, the power supply assembly 3 is arranged at the bottom of the case 1, the lower bracket 62 is arranged above the power supply assembly 3, the fan 8 is arranged at the bottom of the lower bracket 62, the compressor 21 is arranged on the lower bracket 62 through the spring damping device 9, the liner shell 7 is sleeved on the compressor 21 and fixed on the lower bracket 62, and the blowback valve 24 is arranged on the lower bracket 62 and is positioned in the central space of the spring damping device 9. The oxygen concentration sensor 5 is fixed to the front end surface of the liner front case 71. The first molecular sieve adsorption tower 231 and the second molecular sieve adsorption tower 232 are respectively arranged on the lower bracket 62 and positioned at two sides of the liner housing 7. The oxygen storage tank 25 and the nitrogen discharging muffler 4 are respectively arranged on the shoulders at the two sides of the liner shell 7. The upper bracket 61 is provided with a first molecular sieve adsorption tower 231 and a second molecular sieve adsorption tower 232 respectively on both sides thereof, and the pilot valve 22, the oxygen-saving valve 26 and the oxygen-saving controller are arranged on the upper bracket 61. Referring to fig. 7, the circuit board 10 is fixed at the rear edges of the upper and lower brackets 61 and 62.

According to the portable oxygen generator, through the design of the back flushing valve, oxygen output by one molecular sieve adsorption tower can be used for pressurizing the other molecular sieve adsorption tower, so that nitrogen can be conveniently discharged, the on-off time between the first back flushing channel and the second back flushing channel is accurately controlled through the electric control part, the alternate back flushing operation is realized, the working efficiency of the molecular sieve adsorption tower is improved, and the nitrogen discharging and oxygen generating effects are improved. In addition, through the setting of inner bag casing, can carry out the noise reduction to the noise that the compressor produced, through the setting of inside support, install each part rationally inside quick-witted incasement portion, can improve the space utilization of quick-witted case, be favorable to the miniaturization of portable oxygenerator, light-duty design.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made, or combinations of the above-described embodiments can be made, without departing from the spirit of the invention, and all such changes and modifications, including combinations of features of the various embodiments described above, are within the scope of the invention.