Micro hyperbaric oxygen chamber

Abstract

The invention provides a micro hyperbaric oxygen chamber, and belongs to the technical field of medical treatment. A micro-hyperbaric oxygen chamber comprises a chamber body assembly, the chamber body assembly is provided with a cavity, the chamber body assembly is provided with an access channel for a human body to go in and out, and the periphery of the access channel is provided with a reinforcing part; the cabin door is rotationally connected to the cabin body assembly, and when the cabin door is closed, the cabin door is in non-contact clearance fit with the reinforcing part on the periphery of the access channel; the dynamic sealing system comprises at least one inflatable sealing body arranged around the inlet and outlet channel, a closed annular air channel structure is arranged in the inflatable sealing body, and radial expansion is achieved through air pressure driving so as to make contact with the reinforcing part for sealing; the interlocking pressure maintaining device comprises a pneumatic actuator, a mechanical pilot valve and an electromagnetic control valve, the mechanical pilot valve is provided with a main circulation hole and a bypass pressure relief hole, and a piston rod of the pneumatic actuator and the bypass pressure relief hole can form linear sealing.

Description

Technical Field

[0001] The present invention belongs to the field of medical technology, and particularly relates to a micro hyperbaric oxygen chamber. Background Art

[0002] In the prior art, hyperbaric oxygen chambers are widely used in medical treatment, rehabilitation, diving and other fields to provide a high-oxygen environment to promote the recovery of patients. However, there are certain technical bottlenecks in the sealing performance of traditional hyperbaric oxygen chambers.

[0003] Firstly, the sealing structure of traditional oxygen chambers usually relies on mechanical locking or static rubber sealing rings to prevent oxygen leakage. However, during long-term use, the rubber sealing rings are prone to aging, deformation or permanent compression deformation, resulting in a decline in sealing performance and affecting the safety and airtightness of the oxygen chamber.

[0004] Secondly, to ensure good sealing effect, the closing of the traditional oxygen chamber door usually requires a large mechanical pressure to make the sealing strip closely adhere to the edge of the chamber door. This not only increases the operation difficulty, making the process of opening and closing the door laborious, but also may cause excessive wear of the sealing parts, further shortening their service life.

[0005] In addition, in the existing sealing structure, due to the fixed sealing strip, its adaptability is poor. When the chamber body has slight deformation due to manufacturing errors or thermal expansion and contraction, the original sealing structure may not be able to fully adapt, thereby affecting the overall sealing effect of the oxygen chamber. Summary of the Invention

[0006] The purpose of the present invention is to address the above problems existing in the prior art and propose a micro hyperbaric oxygen chamber. The present invention realizes adaptive sealing through a dynamic sealing system and ensures sealing reliability and chamber pressure safety with the dual pressure feedback mechanism of an interlock pressure maintaining device.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A micro hyperbaric oxygen chamber, comprising:

[0009] A chamber body assembly, the chamber body assembly having a chamber, the chamber body assembly being provided with an access passage for a human body to enter and exit, and a strengthening portion being provided on the periphery of the access passage;

[0010] A chamber door, rotatably connected to the chamber body assembly, and forming a non-contact clearance fit with the strengthening portion on the periphery of the access passage when closed;

[0011] A dynamic sealing system, including at least one inflatable sealing body arranged around the access passage, the inflatable sealing body being internally provided with a closed annular air duct structure, and realizing radial expansion through air pressure drive to contact the strengthening portion for sealing;

[0012] The interlocking pressure-holding device includes a pneumatic actuator, a mechanical pilot valve, and an electromagnetic control valve. The mechanical pilot valve is provided with a main flow passage hole and a bypass pressure-relief hole. The piston rod of the pneumatic actuator can form a linear seal with the bypass pressure-relief hole. The air chamber of the pneumatic actuator is communicated with the chamber to form pressure linkage. One end of the main flow passage hole is communicated with a closed annular air passage structure, and the other end is communicated with the electromagnetic control valve.

[0013] In the above-mentioned micro-high-pressure oxygen chamber, the interlocking pressure-holding device further includes an elastic member. The elastic member is a spiral compression spring, which is coaxially sleeved on the outer periphery of the piston rod. One end of it is fixed on the piston rod of the pneumatic actuator, and the other end abuts against the end face of the mechanical pilot valve body to form a dynamic balance under the dual action of pressure and spring.

[0014] In the above-mentioned micro-high-pressure oxygen chamber, the cabin door includes a frame body and an observation window. A sealing groove is provided on the frame body, and the observation window is tightly connected to the frame body. Among them, the sealing groove forms a fitting seal with the inflatable seal body.

[0015] In the above-mentioned micro-high-pressure oxygen chamber, the reinforcing part is provided with an installation groove. The ratio of the depth of the installation groove to the height of the inflatable seal body in the unexpanded state is 1:0.8 - 1, and the installation groove forms an interference fit with the inflatable seal body.

[0016] In the above-mentioned micro-high-pressure oxygen chamber, the cross-section of the sealing groove is arc-shaped. When the inflatable seal body bulges, the outer surface of the inflatable seal body forms an arc-shaped contact surface, and the contact surface forms a surface seal with the depression.

[0017] In the above-mentioned micro-high-pressure oxygen chamber, in the non-working state of the inflatable seal body, the minimum gap between the outer surface of the inflatable seal body and the surface of the frame body is ≥2 mm, forming a clear non-contact state.

[0018] In the above-mentioned micro-high-pressure oxygen chamber, the dynamic sealing system includes two inflatable seal bodies arranged at intervals along the circumferential direction, which are respectively located at the inner and outer edges of the closing surface of the cabin door to form a redundant sealing structure.

[0019] In the above-mentioned micro-high-pressure oxygen chamber, in the closed state, the frame body is located inside the cabin body assembly so that the frame body is subjected to the internal air pressure and fits on the inflatable seal body.

[0020] In the above-mentioned micro-high-pressure oxygen chamber, when the cabin door is in the open state, at least part of the cabin door is received in the chamber.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] In this application, the inflatable seal is driven by air pressure to expand radially, forming an adaptive sealing interface with the door reinforcement. When the door is closed, it only has a clearance fit with the cabin body, avoiding mechanical wear and extending the service life. It only expands and seals when pressurized, with a dual-path control logic. The solenoid valve controls the air source to supply air to the seal, driving the seal to expand. The mechanical pilot valve is linked with the pneumatic actuator to automatically relieve pressure in case of abnormal pressure. The air chamber of the pneumatic actuator is directly connected to the cabin pressure to achieve real-time feedback of pressure-mechanical displacement. When the solenoid valve fails, the mechanical pilot valve maintains the cabin pressure safety through the linear sealing bypass hole of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structure in this application;

[0024] Figure 2 is a sectional view structure diagram of a cabin assembly and a door in this application;

[0025] Figure 3 is Figure 2 a partial enlarged view of position A in

[0026] Figure 4 is Figure 2 a partial enlarged view of position B in

[0027] Figure 5 is a schematic structural diagram after the dynamic sealing system is started based on 4;

[0028] Figure 6 is Figure 2 a partial enlarged view of position C in

[0029] Figure 7 is Figure 6 a schematic structural diagram of the sealing bypass pressure relief hole of the pneumatic actuator based on

[0030] In the figure,

[0031] 2. Cabin assembly; 21. Chamber; 22. Inlet and outlet passage; 23. Reinforcement; 231. Installation groove;

[0032] 3. Door; 31. Frame; 311. Sealing groove; 32. Observation window;

[0033] 4. Dynamic sealing system; 41. Inflatable seal; 411. Closed annular air duct structure; 412. Contact surface;

[0034] 5. Interlocking pressure maintaining device; 51. Pneumatic actuator; 511. Piston rod; 52. Mechanical pilot valve; 521. Bypass pressure relief hole; 53. Solenoid valve;

[0035] 6. Elastic member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0037] As Figures 1 to 7 shown, a micro-hyperbaric oxygen chamber includes: a cabin assembly 2, a cabin door 3, a dynamic sealing system 4, and an interlock pressure maintaining device 5. The cabin assembly 2 has a chamber 21, and the cabin assembly 2 is provided with an access passage 22 for the human body to enter and exit. A reinforcing portion 23 is provided on the periphery of the access passage 22; the cabin door 3 is rotatably connected to the cabin assembly 2, and when closed, forms a non-contact clearance fit with the reinforcing portion 23 on the periphery of the access passage 22; the dynamic sealing system 4 includes at least one inflatable seal 41 arranged around the access passage 22. The inflatable seal 41 is internally provided with a closed annular airway structure 411, and realizes radial expansion through air pressure drive to contact the reinforcing portion 23 for sealing; the interlock pressure maintaining device 5 includes a pneumatic actuator 51, a mechanical pilot valve 52, and an electromagnetic control valve 53. The mechanical pilot valve 52 is provided with a main flow passage hole and a bypass pressure relief hole 521. The piston rod 511 of the pneumatic actuator 51 can form a linear seal with the bypass pressure relief hole 521. The air chamber of the pneumatic actuator 51 is communicated with the chamber 21 and forms a pressure linkage. One end of the main flow passage hole is communicated with the closed annular airway structure 411, and the other end is communicated with the electromagnetic control valve 53.

[0038] In this application, the cabin door rotates upward and towards the cabin assembly 2. Specifically, it moves while being attached to the upper wall of the cabin assembly 2 (not shown in the figure).

[0039] In this application, as Figures 2 to 5 shown, when the cabin door 3 rotates to the closed position, it forms a non-contact clearance fit with the reinforcing portion 23 on the periphery of the access passage 22.

[0040] At this time, as Figures 4 to 5 shown, the inflatable seal 41 in the dynamic sealing system 4 begins to play a key role. The inflatable seal 41 is internally provided with a closed annular airway structure 411. When sealing is required, through air pressure drive, gas enters the closed annular airway structure 411. As the gas is continuously injected, the inflatable seal 41 realizes radial expansion until it contacts the reinforcing portion 23 on the periphery of the access passage 22, thereby completing the sealing process and preventing oxygen leakage.

[0041] Meanwhile, gas is also introduced into the chamber 21 to increase the internal pressure, and the interlock pressure-holding device 5 also starts to work. The air chamber of the pneumatic actuator 51 in the interlock pressure-holding device 5 is connected to the chamber 21 of the cabin assembly 2 to form pressure linkage. When the pressure in the chamber 21 changes, the pneumatic actuator 51 can promptly sense this pressure change. The mechanical pilot valve 52 is provided with a main flow passage hole and a bypass pressure relief hole 521. When the internal pressure in the chamber 21 increases, the piston rod 511 of the pneumatic actuator 51 moves and forms a linear seal with the bypass pressure relief hole 521, as Figures 6 to 7 shown. After the pressure in the closed annular air passage structure 411 is sufficient, the solenoid valve 53 can be closed. When the solenoid valve 53 is closed, the pneumatic actuator 51 pushes the piston rod 511 through the internal pressure in the chamber 21 to maintain a linear seal, ensuring that the bypass pressure relief hole 521 remains closed continuously.

[0042] Another significant advantage of this interlock pressure-holding device 5 is that even in the event of a power outage or the failure of the solenoid valve 53, as long as there is a certain pressure in the cabin assembly 2, the piston rod 511 of the pneumatic actuator 51 can continuously close the bypass pressure relief hole 521, thereby ensuring the pressure holding inside the chamber 21 and enabling the customer to continue to enjoy the treatment effect. In addition, a manual pressure relief valve is provided on the cabin assembly 2. The other end of the solenoid valve 53 is connected to the air source.

[0043] If the pressure in the chamber 21 decreases, the gas in the closed annular air passage structure 411 will push open the piston rod 511 of the pneumatic actuator 51 from the bypass pressure relief hole 521 and reduce the internal pressure of the inflatable seal 41, so that the inflatable seal 41 resets and the cabin door 3 is in an openable state.

[0044] Specifically, as Figure 2 、 Figure 6 、 Figure 7 shown, the interlock pressure-holding device 5 further includes an elastic member 6. The elastic member 6 is a helical compression spring, which is coaxially sleeved on the outer periphery of the piston rod 511. One end of it is fixed on the piston rod 511 of the pneumatic actuator 51, and the other end abuts against the end face of the valve body of the mechanical pilot valve 52 to form a dynamic balance under the dual action of pressure and spring.

[0045] When the pressure in the chamber 21 abnormally decreases, the piston rod 511 of the pneumatic actuator 51 will open the bypass pressure relief hole 521 under the action of the elastic member 6, so that part of the gas in the inflatable seal 41 is discharged through the bypass pressure relief hole 521, thereby reducing the pressure in the inflatable seal 41 and making the cabin door 3 in an openable state. Through the setting of the elastic member 6, it can be ensured that after the chamber pressure decreases, the inflatable seal 41 can be smoothly depressurized.

[0046] Based on pneumatic drive and superimposed with spring pre-tightening force, a composite drive system of pneumatic active compensation + spring passive buffering is formed. When the cabin pressure changes suddenly, the spring force can respond within a short time.

[0047] Specifically, as Figures 1 to 5 shown, the cabin door 3 includes a frame 31 and an observation window 32. A sealing groove 311 is provided on the frame 31, and the observation window 32 is tightly connected to the frame 31; among them, the sealing groove 311 forms a fitting seal with the inflatable seal 41.

[0048] The sealing groove 311 machined on the inner side wall of the frame 31 forms a fitting seal with the inflatable seal 41, which is the second and more critical sealing measure.

[0049] The setting of the observation window 32 provides a clear observation field of view for users and medical staff, facilitating the observation of the situation inside the cabin at any time during the treatment process and timely understanding of the patient's condition.

[0050] Specifically, as Figures 2 to 5 shown, the reinforcing part 23 is provided with an installation groove 231. The ratio of the depth of the installation groove 231 to the height of the inflatable seal 41 in the unexpanded state is 1:0.8 - 1, and the installation groove 231 forms an interference fit with the inflatable seal 41.

[0051] The installation groove 231 and the inflatable seal 41 are in interference fit. When the inflatable seal 41 is not expanded, they are already in close contact. When the inflatable seal 41 is driven by air pressure to expand, due to the accurate setting of the ratio of the depth of the installation groove 231 to the height in the unexpanded state at 1:0.8 - 1, it can quickly and fully fill the remaining space of the installation groove 231, fit the groove wall without gaps in all directions, and extend towards the outside and abut against the groove, thus forming an effective seal.

[0052] Because the ratio of the depth of the installation groove 231 to the height in the unexpanded state is accurately set at 1:0.8 - 1, it can be avoided that when not in the startup state, the opening and closing of the cabin door 3 will not touch the cabin body assembly 2, and the frictional damage of the inflatable seal 41 is avoided. Normally, the inflatable seal 41 will be hidden in the installation groove 231. Preferably, the ratio of the depth of the installation groove 231 to the height in the unexpanded state is accurately set at 1:1.

[0053] Specifically, as Figure 5 shown, the cross-section of the sealing groove 311 is arc-shaped. When the inflatable seal 41 bulges, an arc-shaped contact surface 412 is formed on the outer surface of the inflatable seal 41, and the contact surface 412 forms a surface seal with the depression.

[0054] When the inflatable seal 41 bulges, the arc-shaped contact surface 412 formed on its outer surface fits with the arc-shaped depression of the seal groove 311. Compared with the traditional line seal or point seal, the surface seal significantly increases the area of the seal contact surface 412, can more effectively prevent oxygen leakage, thereby improving the sealing performance of the cabin, ensuring a stable high-oxygen environment inside the cabin, and guaranteeing the treatment effect.

[0055] Specifically, as Figures 2 to 5 shown, when the inflatable seal 41 is in a non-working state, the minimum gap between the outer surface of the inflatable seal 41 and the surface of the frame 31 is ≥ 2 mm, forming a clear non-contact state.

[0056] In the non-working state, the inflatable seal 41 is not in contact with the surface of the frame 31, avoiding wear and damage caused by long-term friction and extrusion between the two. The seal remains in its natural state when not under external force, reducing material fatigue and aging, thereby extending its service life and reducing the frequency of seal replacement and maintenance costs.

[0057] The clear non-contact state makes the opening and closing of the cabin door 3 smoother, without increasing the operation difficulty due to friction or jamming between the seal and the surface of the frame 31.

[0058] Specifically, the dynamic seal system 4 includes two inflatable seals 41 arranged at intervals along the circumferential direction, located at the inner and outer edges of the closing surface of the cabin door 3 respectively, forming a redundant seal structure.

[0059] The two inflatable seals 41 arranged at intervals along the circumferential direction build two tight lines of defense at the inner and outer edges of the closing surface of the cabin door 3 respectively. When the sealing efficiency of the inner inflatable seal 41 decreases due to accidents (such as local aging, minor damage), the outer seal can quickly take over the sealing task and continuously prevent oxygen leakage, ensuring the stability of the high-oxygen environment inside the cabin, greatly improving the safety and effectiveness during the treatment process, and providing reliable treatment conditions for patients.

[0060] Specifically, as Figure 2 shown, when in a closed state, the frame 31 is located inside the cabin assembly 2, so that the frame 31 is subjected to the internal air pressure and fits on the inflatable seal 41.

[0061] When the treatment cabin is in a closed state and the internal air pressure increases, the pressure inside the cabin acts on the frame 31, causing the frame 31 to tightly fit on the inflatable seal 41, which is a two-way contact, improving the airtightness.

[0062] Specifically, as Figure 2 shown, when the cabin door 3 is in an open state, the cabin door 3 is at least partially received in the chamber 21.

[0063] The hatch 3 is stored in the chamber 21 in the open state, greatly reducing the possibility of being collided by external objects. If the outward-opening hatch 3 may cause collision injuries to surrounding personnel during the opening process.

[0064] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back..., are only used to explain the relative positional relationship and movement conditions between the components in a certain specific posture, as shown in the attached drawings. If this specific posture changes, then the directional indication also changes accordingly.

[0065] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. At the same time, the meaning of "and / or" appearing throughout the text is that it includes three scenarios. Taking "A and / or B" as an example, it includes the scenario of A, or the scenario of B, or the scenario where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0066] The above components are all common standard components or components known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or by conventional experimental methods.

[0067] The specific embodiments described herein are only examples of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the present invention or exceed the scope defined by the appended claims.

Claims

1. A micro hyperbaric oxygen chamber, characterized in that, Comprising: A cabin assembly (2), the cabin assembly (2) having a chamber (21), the cabin assembly (2) being provided with an access passage (22) for a human body to enter and exit, and a reinforcing portion (23) being provided on the periphery of the access passage (22); A cabin door (3), rotatably connected to the cabin assembly (2), and when closed, forming a non-contact clearance fit with the reinforcing portion (23) on the periphery of the access passage (22); A dynamic sealing system (4), comprising at least one inflatable seal body (41) arranged around the access passage (22), and a closed annular air passage structure (411) being provided inside the inflatable seal body (41), and realizing radial expansion through air pressure drive to contact the reinforcing portion (23) for sealing; An interlock pressure maintaining device (5), comprising a pneumatic actuator (51), a mechanical pilot valve (52) and an electromagnetic control valve (53), the mechanical pilot valve (52) being provided with a main flow passage hole and a bypass pressure relief hole (521), a piston rod (511) of the pneumatic actuator (51) being able to form a linear seal with the bypass pressure relief hole (521), an air chamber of the pneumatic actuator (51) being communicated with the chamber (21) and forming a pressure linkage, one end of the main flow passage hole being communicated with the closed annular air passage structure (411), and the other end being communicated with the electromagnetic control valve (53).

2. The micro-hyperbaric oxygen chamber according to claim 1, characterized in that, The interlock pressure maintaining device (5) further includes an elastic member (6), the elastic member (6) being a helical compression spring, coaxially sleeved on the outer periphery of the piston rod (511), one end thereof being fixed on the piston rod (511) of the pneumatic actuator (51), and the other end abutted against the end face of the valve body of the mechanical pilot valve (52), forming a dynamic balance under the dual action of pressure and spring.

3. The micro hyperbaric oxygen chamber according to claim 1, characterized in that The cabin door (3) comprises a frame body (31) and an observation window (32), a sealing groove (311) being provided on the frame body (31), and the observation window (32) being tightly connected with the frame body (31); wherein, the sealing groove (311) forms a fitting seal with the inflatable seal body (41).

4. The micro-hyperbaric oxygen chamber according to claim 3, characterized in that, The reinforcing portion (23) is provided with a mounting groove (231), and the ratio of the groove depth of the mounting groove (231) to the height of the inflatable seal body (41) in the unexpanded state is 1:0.8 - 1, and the mounting groove (231) forms an interference fit with the inflatable seal body (41).

5. The micro hyperbaric oxygen chamber according to claim 3, wherein The cross section of the sealing groove (311) is arc-shaped, and when the inflatable seal body (41) bulges, an arc-shaped contact surface (412) is formed on the outer surface of the inflatable seal body (41), and the contact surface (412) forms a surface seal with the depression.

6. The micro hyperbaric oxygen chamber according to claim 1, characterized in that, When the inflatable seal body (41) is in a non-working state, the minimum clearance between the outer surface of the inflatable seal body (41) and the surface of the frame body (31) is ≥2 mm, forming a clear non-contact state.

7. The micro-hyperbaric oxygen chamber according to claim 1, wherein The dynamic sealing system (4) comprises two inflatable seal bodies (41) arranged at intervals in the circumferential direction, respectively located at the inner and outer edges of the closing surface of the cabin door (3), forming a redundant sealing structure.

8. The micro-hyperbaric oxygen chamber according to claim 1, wherein In a closed state, the frame body (31) is located inside the cabin assembly (2), so that the frame body (31) is subjected to internal air pressure and fits on the inflatable seal body (41).

9. The micro hyperbaric oxygen chamber according to claim 1, characterized in that, When the hatch (3) is in the open state, at least a part of the hatch (3) is received in the chamber (21).

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