Micro-pressure oxygen cabin

Abstract

The utility model provides a kind of micro-pressure oxygen cabin, including cabin, the central position of cabin top is equipped with carrier plate, and the central position of one end of cabin is provided with control panel, the door body is hinged on the side wall of cabin in control panel side, and the inboard of door body is provided with sealing ring.Compared with prior art, the utility model has the beneficial effects as follows: in gas pressure regulating mechanism, the distribution pipe of both ends of cabin top cooperates with the branch pipe of bottom even distribution, can synchronously transport oxygen or compressed air from both sides of cabin to different areas inside, avoid the problem of local concentration too high caused by single gas inlet, realize the preliminary even distribution of gas, the high-speed rotation of gas mixing fan blade in one end of mounting box under the drive of second driving motor, can quickly agitate cabin air, promote the full fusion of input high concentration oxygen and original air, eliminate the oxygen concentration gradient in different positions in cabin, ensure that user can enjoy consistent oxygen inhalation effect in any area in cabin.

Description

Technical Field

[0001] This utility model is a micro-pressure oxygen chamber, belonging to the field of oxygen chambers. Background Technology

[0002] With the rapid development of the health industry and the continuous upgrading of medical and health care needs, micro-pressure oxygen chambers, as a type of device that can improve blood oxygen saturation, promote metabolism, and relieve fatigue by increasing the oxygen concentration and ambient air pressure inside the chamber, have been widely used in many fields such as medical rehabilitation, high-altitude acclimatization training, post-exercise recovery, and daily health care. Its core principle is to create a micro-pressure environment slightly higher than atmospheric pressure in a relatively sealed chamber and provide high-purity oxygen, so that the human body can more efficiently absorb oxygen during breathing, thereby quickly improving the body's hypoxic state. It has a positive effect on the rehabilitation of cardiovascular and cerebrovascular diseases, the treatment of sleep disorders, and the enhancement of immunity.

[0003] Traditional oxygen chambers often employ a single air inlet or a localized air distribution design. After oxygen is introduced, it is difficult to quickly and thoroughly mix with the air inside the chamber, resulting in significant differences in oxygen concentration in different areas. The concentration is too high in areas near the air inlet and insufficient in areas far from the air inlet. Secondly, the existing gas sampling and detection mechanisms mostly use fixed-point sampling, which cannot fully reflect the true oxygen distribution inside the chamber. This leads to deviations in the detection data received by the controller, which in turn affects the response accuracy of the pressure regulation mechanism and makes it difficult to maintain the stability of the oxygen concentration and pressure inside the chamber within the set range. Therefore, it is necessary to design a micro-pressure oxygen chamber. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a micro-pressure oxygen chamber to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a micro-pressure oxygen chamber, comprising: The cabin has a carrier plate installed at the center of the top, and a control panel is installed at the center of one end of the cabin. A door is hinged to the side wall of the cabin on one side of the control panel, and a sealing ring is provided on the inside of the door. The air pressure regulating mechanism is located on the top of the cabin; Mounting box, fixed to the bottom of the carrier plate; The mounting bracket is fixed to the center of the bottom of the mounting box by bolts. The mounting bracket includes a central sleeve and two inverted "L"-shaped support brackets symmetrically welded to both sides of the sleeve. A pressure sensor is fixed to the side of the bottom horizontal plate of the support bracket away from the sleeve. The gas extraction mechanism extends vertically through the sleeve and upwards into the mounting box; The oxygen content detector is located in the center of the installation box, and the output end of the gas sampling mechanism is rotatably connected to the input end of the oxygen content detector. The controller is located on one side inside the mounting box; Mixing fan blades are located at one end of the mounting box; The drive mechanism, located at one end of the bottom of the mounting box, is used to drive the mixing fan blades and the gas collection mechanism to rotate.

[0006] Furthermore, an installation slot is provided at the center of the top of the cabin, and the length and width of the carrier plate are greater than the length and width of the installation slot. The shape of the installation box matches the inner contour of the installation slot, and the installation box passes through the installation slot and extends into the cabin. An upwardly protruding shielding edge is provided at the edge of the top of the cabin, and a ladder is fixed on one side of the cabin.

[0007] Furthermore, the air pressure regulating mechanism includes a compressed air pump, a filter box, a two-in-one-out solenoid valve, a one-in-two-out solenoid valve, an air guide pipe, and a distribution pipe. The filter box and an oxygen generator are fixed to the top of the carrier plate, with the input end of the oxygen generator connected to the output end of the filter box. A compressed air pump is installed on the side of the filter box away from the oxygen generator, and the input end of the filter box is connected to the output end of the compressed air pump via a conduit. Distribution pipes are fixed to both ends of the top of the chamber, and branch pipes are evenly distributed at the bottom of both distribution pipes. The branch pipe extends through the top of the cabin and into the cabin body. The input end of the compressed air pump is connected to the outlet of the two-in-one-out solenoid valve. One inlet of the two-in-one-out solenoid valve is connected to two distribution pipes through an inverted "U"-shaped air guide pipe. The other inlet of the two-in-one-out solenoid valve is connected to the external environment. The output end of the oxygen generator is connected to the inlet of the one-in-two-out solenoid valve. One outlet of the one-in-two-out solenoid valve is connected to two distribution pipes through an inverted "U"-shaped air guide pipe. The other outlet of the one-in-two-out solenoid valve is connected to the external environment.

[0008] Furthermore, the filter box has three vertically arranged slots evenly distributed inside, and each of the three slots is fitted with a filter assembly. The filter assembly includes an outer frame that matches the slot, a sealing baffle fixed to the top of the outer frame, a handle located at the center of the top of the sealing baffle, and a filter screen located inside the outer frame. The three filter screens are respectively configured as a primary polyester fiber filter, a medium-efficiency HEPA filter, and a high-efficiency activated carbon filter along the airflow direction.

[0009] Furthermore, the gas sampling mechanism includes a main pipe, side pipes, gas sampling buckets, a movable cylinder, a transmission rod, a rotary bearing, and a sealed rotary joint. The movable cylinder is located inside the sleeve, with its bottom extending out of the sleeve. The main pipe is installed at the bottom of the movable cylinder, and multiple side pipes are distributed at equal angles around the outer periphery of the main pipe. Gas sampling buckets are evenly arranged on the side pipes. The transmission rod is vertically inserted into the top of the movable cylinder, and its top extends out of the movable cylinder and into the mounting box. The transmission rod is rotatably connected to the center of the bottom of the mounting box via a rotary bearing, and its top is rotatably and sealed to the input end of the oxygen content detector via a sealed rotary joint.

[0010] Furthermore, the inner diameter of the sleeve matches the outer diameter of the movable cylinder, and limit bolts are installed at the bottom of both sides of the sleeve. An elliptical guide groove is provided on the outer surface of the movable cylinder, and the bottom of the movable cylinder is threadedly connected to the main pipe through a threaded connector. The end of the limit bolt is designed in an arc shape and is inserted into the elliptical guide groove. Four vertical convex ridges are provided at equal angles on the outer surface of the transmission rod inside the sleeve, and a limit ridge groove matching the shape of the convex ridges is provided on the inner side wall of the movable cylinder.

[0011] Furthermore, the drive mechanism includes a protective shell, a first drive motor, a second drive motor, and a main bevel gear. The protective shell is fixed at the center of one end of the bottom of the mounting box, and the first drive motor and the second drive motor with opposite output ends are installed inside the protective shell. The output end of the second drive motor extends out of the protective shell and is connected to the center of the air mixing fan blade, and the output end of the first drive motor extends out of the protective shell and is connected to the main bevel gear. A secondary bevel gear that meshes with the main bevel gear is fixed on the transmission rod between the movable cylinder and the mounting box.

[0012] The beneficial effects of this utility model are: 1. In the air pressure regulation mechanism, the distribution pipes at both ends of the top of the chamber, together with the evenly distributed branch pipes at the bottom, can simultaneously deliver oxygen or compressed air from both sides of the chamber to different areas inside, avoiding the problem of excessively high local concentration caused by a single air inlet, and achieving preliminary uniform distribution of gas. The mixing fan blades at one end of the chamber rotate at high speed under the drive of the second drive motor, which can quickly agitate the air inside the chamber, promote the full mixing of the input high-concentration oxygen with the original air, eliminate the oxygen concentration gradient in different locations inside the chamber, and ensure that users can enjoy a consistent oxygen inhalation effect in any area inside the chamber. In addition, by switching the opening and closing of the two-in-one-out solenoid valve and the one-in-two-out solenoid valve, in conjunction with the operation of the oxygen generator, the chamber can be equipped with air intake, pressurization, oxygenation, and the discharge or re-filtration of the gas inside the chamber.

[0013] 2. The gas sampling mechanism adopts a three-dimensional structure of "main pipe + multiple side pipes + gas sampling bucket" and is linked to the drive mechanism. The first drive motor drives the transmission rod to rotate through the main bevel gear and the secondary bevel gear. The transmission rod then drives the movable cylinder to rotate through the cooperation of the convex edge and the limiting groove. This causes the gas sampling bucket to move around the axis of the transmission rod with the movable cylinder. At the same time, the cooperation of the elliptical guide groove and the limiting bolt allows the movable cylinder to move up and down during rotation. This ultimately enables gas sampling at different heights and different circumferential positions in the chamber, avoiding the limitations of fixed sampling and providing comprehensive and accurate oxygen concentration data in the chamber for the oxygen content detector. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a micro-pressure oxygen chamber according to the present invention; Figure 2 This is a schematic diagram of the cabin structure of a micro-pressure oxygen chamber according to the present invention; Figure 3 This is a schematic diagram of the air pressure regulating mechanism of a micro-pressure oxygen chamber according to the present invention; Figure 4 This is a partial cross-sectional schematic diagram of the drive mechanism of a micro-pressure oxygen chamber according to the present invention; Figure 5 This is a cross-sectional view of the gas sampling mechanism of a micro-pressure oxygen chamber according to the present invention. In the picture: 1. Hull; 101. Sheath edge; 102. Mounting through slot; 2. Door body; 201. Sealing ring; 3. Climbing ladders; 4. Air pressure regulating mechanism; 401. Compressed air pump; 402. Filter box; 4021. Slot; 403. Filter assembly; 404. Oxygen generator; 405. Two-in-one-out solenoid valve; 406. One-in-two-out solenoid valve; 407. Air guide pipe; 408. Distribution pipe; 4081. Branch pipe; 5. Control Panel; 6. Installation box; 7. Mounting bracket; 701. Sleeve; 7011. Limit bolt; 702. Support bracket; 8. Mixing fan blades; 9. Drive mechanism; 901. Protective housing; 902. First drive motor; 903. Second drive motor; 904. Main bevel gear; 10. Oxygen content detector; 11. Controller; 12. Gas extraction mechanism; 1201. Main pipe; 1202. Side pipe; 1203. Gas extraction bucket; 1204. Movable cylinder; 12041. Threaded connector; 12042. Elliptical guide groove; 12043. Limiting groove; 1205. Transmission rod; 12051. Protruding ridge; 1206. Secondary bevel gear; 1207. Rotary bearing; 1208. Sealed rotary joint; 13. Barometric pressure sensor; 14. Carrier plate. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] Please see Figures 1 to 5 This utility model provides a technical solution: a micro-pressure oxygen chamber, including a chamber body 1, a carrier plate 14 installed at the center of the top of the chamber body 1, and a control panel 5 located at the center of one end of the chamber body 1. A door 2 is hinged to the side wall of the chamber body 1 on one side of the control panel 5, and a sealing ring 201 is provided on the inner side of the door 2. An air pressure regulating mechanism 4 is located at the top of the chamber body 1. A mounting box 6 is fixed to the bottom of the carrier plate 14, and a mounting frame 7 is fixed to the center of the bottom of the mounting box 6 by bolts. The mounting frame 7 includes... The system includes a central sleeve 701 and two symmetrically welded inverted "L"-shaped support frames 702 on both sides of the sleeve 701. Pressure sensors 13 are fixed to the side of the bottom horizontal plate of each support frame 702 away from the sleeve 701. A gas sampling mechanism 12 vertically penetrates the sleeve 701 and extends upwards into the mounting box 6. An oxygen content detector 10 is located in the center of the mounting box 6, and the output end of the gas sampling mechanism 12 is rotatably connected to the input end of the oxygen content detector 10. A controller 11 is located inside the mounting box 6. On one side, the mixing fan blade 8 is located at one end of the mounting box 6, and the drive mechanism 9 is located at one end of the bottom of the mounting box 6. It is used to drive the mixing fan blade 8 and the gas sampling mechanism 12 to rotate. The inner side of the door 2 hinged to the side wall of the chamber 1 is provided with a sealing ring 201, which can tightly fit the inner wall of the chamber 1 when the door 2 is closed, effectively preventing leakage of micro-pressure gas in the chamber and ensuring the stability of the micro-pressure environment. The drive mechanism 9 can drive the mixing fan blade 8 and the gas sampling mechanism 12 to rotate at the same time, without the need to configure separate drive devices for the two, reducing equipment energy consumption and failure points. The mixing fan blade 8 rotates at high speed under the drive of the second drive motor 903, which can quickly agitate the air in the chamber and provide power for the gas delivered by the pressure regulating mechanism 4 to mix with the air in the chamber. The rotational connection between the gas sampling mechanism 12 and the oxygen content detector 10 does not affect the movement sampling of the gas sampling mechanism 12, and ensures that the sampled gas is stably delivered to the oxygen content detector 10, ensuring the accuracy of the detection data and providing a reliable basis for the controller 11 to regulate the opening and closing of the solenoid valve of the pressure regulating mechanism 4 and the operation of the oxygen generator 404.

[0017] Please see Figure 2 An installation slot 102 is provided at the center of the top of the cabin 1, and the length and width of the carrier plate 14 are greater than the length and width of the installation slot 102. The shape of the installation box 6 matches the inner contour of the installation slot 102, and the installation box 6 passes through the installation slot 102 and extends into the cabin 1. A protruding shielding edge 101 is provided at the edge of the top of the cabin 1, and a ladder 3 is fixed on one side of the cabin 1. The length and width of the carrier plate 14 are greater than the installation slot 102, which can completely cover the top of the installation slot 102, further enhancing the sealing effect. The ladder 3 makes it easy for workers to climb to the top of the cabin 1 to maintain the air pressure regulating mechanism 4.

[0018] Please see Figure 3The air pressure regulating mechanism 4 includes a compressed air pump 401, a filter box 402, a two-in-one-out solenoid valve 405, a one-in-two-out solenoid valve 406, an air guide pipe 407, and a distribution pipe 408. The filter box 402 and an oxygen generator 404 are fixed to the top of the carrier plate 14, with the input end of the oxygen generator 404 connected to the output end of the filter box 402. The compressed air pump 401 is installed on the side of the filter box 402 away from the oxygen generator 404, and the input end of the filter box 402 is connected to the output end of the compressed air pump 401 via a conduit. Distribution pipes 408 are fixed to both ends of the top of the cabin 1. The bottom of each chamber is evenly equipped with branch pipes 4081, which extend through the top of the chamber 1 into the chamber 1. The input end of the compressed air pump 401 is connected to the outlet of the two-inlet-one-outlet solenoid valve 405. One inlet of the two-inlet-one-outlet solenoid valve 405 is connected to two distribution pipes 408 through an inverted "U"-shaped air guide pipe 407. The other inlet of the two-inlet-one-outlet solenoid valve 405 is connected to the external environment. The output end of the oxygen generator 404 is connected to the inlet of the one-inlet-two-outlet solenoid valve 406. One outlet of the one-inlet-two-outlet solenoid valve 406 is connected to two distribution pipes 408 through an inverted "U"-shaped air guide pipe 407. The other outlet of the one-in-one-out solenoid valve 406 is connected to the external environment. During operation, the airflow direction is always along the path from the two-in-one-out solenoid valve 405, the compressed air pump 401, the filter box 402, the oxygen generator 404, to the one-in-one-out solenoid valve 406. By switching the opening and closing states of the two-in-one-out solenoid valve 405 and the one-in-one-out solenoid valve 406, in conjunction with the operation of the oxygen generator 404, various gas control functions within the cabin can be achieved. When the "external environment air intake" channel of the two-in-one-out solenoid valve 405 is open and the compressed air pump 401 is running, the external environment air is filtered and delivered to the distribution pipe 408, and then through the branch pipe. 4081 introduces fresh air into the chamber; if pressurization is required, the power of the compressed air pump 401 can be increased to improve the intake rate and raise the chamber pressure; when the two-in-one-out solenoid valve 405 "chamber intake" channel is opened and the oxygen generator 404 is running, the gas in the chamber is filtered by the filter box 402, mixed with oxygen, and then sent into the chamber through the air guide pipe 407, distribution pipe 408, and branch pipe 4081 to increase the oxygen concentration in the chamber; when the chamber pressure is too high or the air needs to be renewed, the one-in-two-out solenoid valve 406 "exhaust" channel is opened, and excess gas or turbid air in the chamber can be directly exhausted.

[0019] Please see Figure 3The filter box 402 has three vertically arranged slots 4021 evenly spaced inside, and each of the three slots 4021 is fitted with a filter assembly 403. The filter assembly 403 includes an outer frame adapted to the slot 4021, a sealing baffle fixed to the top of the outer frame, a handle located at the center of the top of the sealing baffle, and filter screens located inside the outer frame. The three filter screens are respectively configured as a primary polyester fiber filter, a medium-efficiency HEPA filter, and a high-efficiency activated carbon filter along the airflow direction. The three slots 4021 inside the filter box 402 are respectively fitted with... The filter assembly 403 contains a primary polyester fiber filter that removes large particulate impurities such as dust and hair from the gas, a medium-efficiency HEPA filter that filters fine particulate matter such as PM2.5 and pollen, and a high-efficiency activated carbon filter that adsorbs formaldehyde, odors, and microorganisms. Both the ambient air and the recirculated gas inside the cabin must undergo three stages of filtration to ensure that the gas entering the cabin is pure and unpolluted. The outer frame of the filter assembly 403 is compatible with the slot 4021, and the sealing baffle on the top ensures that the inside of the filter box 402 is sealed to prevent the leakage of unfiltered gas.

[0020] Please see Figure 5The gas extraction mechanism 12 includes a main pipe 1201, side pipes 1202, a gas extraction bucket 1203, a movable cylinder 1204, a transmission rod 1205, a rotary bearing 1207, and a sealed rotary joint 1208. The movable cylinder 1204 is disposed inside the sleeve 701, and the bottom of the movable cylinder 1204 extends out of the sleeve 701. The main pipe 1201 is installed at the bottom of the movable cylinder 1204, and multiple side pipes 1202 are distributed at equal angles on the outer periphery of the main pipe 1201, and the side pipes 1202 are evenly arranged. A gas sampling bucket 1203 is provided. A transmission rod 1205 is vertically inserted into the top of the movable cylinder 1204, and the top of the transmission rod 1205 extends out of the movable cylinder 1204 and into the mounting box 6. The transmission rod 1205 is rotatably connected to the center of the bottom of the mounting box 6 through a rotary bearing 1207, and the top of the transmission rod 1205 is rotatably and sealed to the input end of the oxygen content detector 10 through a sealed rotary joint 1208. Multiple side pipes 1202 cooperate with the gas sampling buckets evenly arranged on the side pipes 1202. 1203 can simultaneously collect gas from different horizontal directions within the chamber, ensuring that the sampling data accurately reflects the actual oxygen concentration within the chamber after the gas pressure regulating mechanism 4 delivers the gas. This provides accurate data for the controller 11 to adjust the opening and closing of the solenoid valve and the power of the oxygen generator 404. The transmission rod 1205 is rotatably connected to the bottom of the mounting box 6 via a rotary bearing 1207, which can drive the movable cylinder 1204, main pipe 1201, side pipe 1202, and gas sampling bucket 1203 to rotate. Under the dynamic environment of the mixing fan blade 8 stirring the air inside the chamber, dynamic sampling in the circumferential direction within the chamber is achieved, avoiding the limitation of fixed sampling which can only detect local areas. The top of the transmission rod 1205 is connected to the oxygen content detector 10 via a sealed rotary joint 1208, which ensures gas sealing when the transmission rod 1205 rotates, preventing gas leakage from affecting detection accuracy, and also stably delivers the sampling gas to the oxygen content detector 10, ensuring accurate detection data and allowing the controller 11 to accurately judge the control effect of the gas pressure regulating mechanism 4.

[0021] Please see Figure 5The inner diameter of the sleeve 701 matches the outer diameter of the movable cylinder 1204, and limit bolts 7011 are installed on the bottom of both sides of the sleeve 701. An elliptical guide groove 12042 is formed on the outer surface of the movable cylinder 1204, and the bottom of the movable cylinder 1204 is threadedly connected to the main pipe 1201 via a threaded connector 12041. The end of the limit bolt 7011 is arc-shaped and inserted into the elliptical guide groove 12042. Four vertical convex ribs 12051 are equally angled on the outer surface of the transmission rod 1205 inside the sleeve 701, and a limit groove 12043 matching the shape of the convex ribs 12051 is formed on the inner wall of the movable cylinder 1204. The matching of the inner diameter of the sleeve 701 and the outer diameter of the movable cylinder 1204 provides precise guidance for the rotation and vertical movement of the movable cylinder 1204, preventing the movable cylinder 1204 from... The movement deflects the gas sampling bucket 1203 to ensure that it can sample along the preset trajectory. The limiting bolts 7011 on both sides of the sleeve 701 are inserted into the elliptical guide grooves 12042 of the movable cylinder 1204, and the ends of the limiting bolts 7011 are arc-shaped. When the movable cylinder 1204 rotates, it can guide the movable cylinder 1204 to move up and down reciprocally through the trajectory of the elliptical guide grooves 12042, realizing "rotation + up and down" composite motion sampling, further expanding the sampling range, and ensuring that gas at different heights and different circumferential positions in the chamber can be collected, providing more comprehensive data for judging the uniformity of the gas delivered by the pressure regulating mechanism 4. The protrusion 12051 of the transmission rod 1205 cooperates with the limiting groove 12043 of the movable cylinder 1204 to ensure that the transmission rod 1205 can drive the movable cylinder 1204 to rotate synchronously when it rotates, avoiding relative slippage between the two and causing the sampling trajectory to deflect.

[0022] Please see Figure 4 The drive mechanism 9 includes a protective shell 901, a first drive motor 902, a second drive motor 903, and a main bevel gear 904. The protective shell 901 is fixed at the center of one end of the bottom of the mounting box 6. The first drive motor 902 and the second drive motor 903, with their output ends facing away from each other, are installed inside the protective shell 901. The output end of the second drive motor 903 extends out of the protective shell 901 and connects to the center of the air mixing fan blade 8. The output end of the first drive motor 902 extends out of the protective shell 901 and connects to the main bevel gear 904. The transmission rod 12 between the movable cylinder 1204 and the mounting box 6... A secondary bevel gear 1206 is fixed on the 05 and meshes with the main bevel gear 904. The output end of the first drive motor 902 is connected to the main bevel gear 904. By meshing with the secondary bevel gear 1206 on the transmission rod 1205, the transmission rod 1205 and the gas sampling mechanism 12 are driven to move, ensuring that the gas sampling mechanism 12 can collect the cabin data after the gas pressure regulating mechanism 4 delivers gas in real time. The output end of the second drive motor 903 is directly connected to the mixing fan blade 8, which drives it to rotate at high speed, so that the gas delivered by the gas pressure regulating mechanism 4 through the distribution pipe 408 and the branch pipe 4081 is fully mixed with the cabin air.

[0023] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-pressure oxygen chamber, characterized in that, include: The cabin (1) has a carrier plate (14) installed at the center of the top, and a control panel (5) is provided at the center of one end of the cabin (1). A door (2) is hinged to the side wall of the cabin (1) on one side of the control panel (5), and a sealing ring (201) is provided on the inner side of the door (2). A pressure regulating mechanism (4) is located on the top of the cabin (1); Mounting box (6) is fixed to the bottom of carrier plate (14); The mounting bracket (7) is fixed to the center of the bottom of the mounting box (6) by bolts. The mounting bracket (7) includes a central sleeve (701) and two inverted "L"-shaped support brackets (702) symmetrically welded to both sides of the sleeve (701). A pressure sensor (13) is fixed on the side of the bottom horizontal plate of the support bracket (702) away from the sleeve (701). The gas extraction mechanism (12) extends vertically through the sleeve (701) and upwards into the mounting box (6); The oxygen content detector (10) is located in the center of the installation box (6), and the output end of the gas sampling mechanism (12) is rotatably connected to the input end of the oxygen content detector (10). The controller (11) is located on one side inside the mounting box (6); Mixing fan blade (8) is located at one end of the mounting box (6); The drive mechanism (9) is located at one end of the bottom of the mounting box (6) and is used to drive the mixing fan blade (8) and the gas collection mechanism (12) to rotate.

2. A micro-pressure oxygen chamber according to claim 1, characterized in that: An installation slot (102) is provided at the center of the top of the cabin (1), and the length and width of the carrier plate (14) are greater than the length and width of the installation slot (102). The shape of the installation box (6) matches the inner contour of the installation slot (102), and the installation box (6) passes through the installation slot (102) and extends into the cabin (1). An upwardly protruding shielding edge (101) is provided at the edge of the top of the cabin (1), and a ladder (3) is fixed on one side of the cabin (1).

3. A micro-pressure oxygen chamber according to claim 1, characterized in that: The air pressure regulating mechanism (4) includes a compressed air pump (401), a filter box (402), a two-in-one-out solenoid valve (405), a one-in-two-out solenoid valve (406), an air guide pipe (407), and a distribution pipe (408). The filter box (402) and an oxygen generator (404) are fixed on the top of the carrier plate (14), and the input end of the oxygen generator (404) is connected to the output end of the filter box (402). The compressed air pump (401) is installed on the side of the filter box (402) away from the oxygen generator (404), and the input end of the filter box (402) is connected to the output end of the compressed air pump (401) through a conduit. The two ends of the top of the cabin (1) are fixed with distribution pipes (408), and the bottoms of the two distribution pipes (408) are evenly distributed. A branch pipe (4081) is provided, which extends through the top of the cabin (1) and into the cabin (1). The input end of the compressed air pump (401) is connected to the outlet of the two-in-one-out solenoid valve (405). One inlet of the two-in-one-out solenoid valve (405) is connected to two distribution pipes (408) through an inverted "U"-shaped air guide pipe (407). The other inlet of the two-in-one-out solenoid valve (405) is connected to the external environment. The output end of the oxygen generator (404) is connected to the inlet of the one-in-two-out solenoid valve (406). One outlet of the one-in-two-out solenoid valve (406) is connected to two distribution pipes (408) through an inverted "U"-shaped air guide pipe (407). The other outlet of the one-in-two-out solenoid valve (406) is connected to the external environment.

4. A micro-pressure oxygen chamber according to claim 3, characterized in that: The filter box (402) has three vertically arranged slots (4021) evenly distributed inside, and each of the three slots (4021) is fitted with a filter assembly (403). The filter assembly (403) includes an outer frame that is adapted to the slot (4021), a sealing baffle fixed to the top of the outer frame, a handle set in the center of the top of the sealing baffle, and a filter screen set in the outer frame. The three filter screens are respectively set as a primary polyester fiber filter, a medium-efficiency HEPA filter, and a high-efficiency activated carbon filter along the airflow direction.

5. A micro-pressure oxygen chamber according to claim 1, characterized in that: The gas extraction mechanism (12) includes a main pipe (1201), side pipes (1202), a gas extraction bucket (1203), a movable cylinder (1204), a transmission rod (1205), a rotary bearing (1207), and a sealed rotary joint (1208). The movable cylinder (1204) is located inside the sleeve (701), and the bottom of the movable cylinder (1204) extends out of the sleeve (701). The main pipe (1201) is installed at the bottom of the movable cylinder (1204), and multiple side pipes (1202) are distributed at equal angles on the outer periphery of the main pipe (1201). 02), and gas sampling buckets (1203) are evenly arranged on the side pipe (1202). A transmission rod (1205) is vertically inserted into the top of the movable cylinder (1204), and the top of the transmission rod (1205) extends out of the movable cylinder (1204) and into the mounting box (6). The transmission rod (1205) is rotatably connected to the center of the bottom of the mounting box (6) through a rotary bearing (1207), and the top of the transmission rod (1205) is rotatably and sealed to the input end of the oxygen content detector (10) through a sealed rotary joint (1208).

6. A micro-pressure oxygen chamber according to claim 5, characterized in that: The inner diameter of the sleeve (701) matches the outer diameter of the movable cylinder (1204), and limit bolts (7011) are installed at the bottom of both sides of the sleeve (701). An elliptical guide groove (12042) is provided on the outer surface of the movable cylinder (1204), and the bottom of the movable cylinder (1204) is threadedly connected to the main pipe (1201) through a threaded connector (12041). The end of the limit bolt (7011) is designed in an arc shape, and the limit bolt (7011) is inserted into the elliptical guide groove (12042). Four vertical convex ridges (12051) are provided at equal angles on the outer surface of the transmission rod (1205) inside the sleeve (701), and a limit ridge groove (12043) matching the shape of the convex ridges (12051) is provided on the inner side wall of the movable cylinder (1204).

7. A micro-pressure oxygen chamber according to claim 6, characterized in that: The drive mechanism (9) includes a protective shell (901), a first drive motor (902), a second drive motor (903), and a main bevel gear (904). The protective shell (901) is fixed at the center of one end of the bottom of the mounting box (6). The first drive motor (902) and the second drive motor (903) with opposite output ends are installed inside the protective shell (901). The output end of the second drive motor (903) extends out of the protective shell (901) and is connected to the center of the air mixing fan blade (8). The output end of the first drive motor (902) extends out of the protective shell (901) and is connected to the main bevel gear (904). A secondary bevel gear (1206) that meshes with the main bevel gear (904) is fixed on the transmission rod (1205) between the movable cylinder (1204) and the mounting box (6).

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