A portable positive and negative pressure oxygen chamber

Abstract

The present invention relates to a portable positive and negative pressure oxygen chamber, the chamber structure of which includes: a cylinder capable of accommodating at least one user; an end cover fixed to one end of the cylinder and closing the end; a door movably mounted on the other end of the cylinder; the characteristics are: the chamber is rolled from an inflatable airtight composite plate, the airtight composite plate includes a three-dimensional hollow woven fabric as an intermediate layer, and a coating layer respectively composited on the two side surfaces thereof; the three-dimensional hollow woven fabric constitutes an inflatable cavity connected to an external air path, and the coating layers on both sides are used to block and seal the inflatable cavity. The present invention shortens the construction time of a traditional soft cabin, and makes it more convenient for people to enter and exit. Since the cylinder is an independently inflated support body and is not connected to the space inside the cabin, in addition to the positive pressure function, it can also be connected to a negative pressure system to obtain both positive and negative pressure functions.

Description

Technical Field

[0001] The invention relates to an oxygen chamber, in particular to a portable positive and negative pressure oxygen chamber, belonging to the technical field of soft chamber structures. Background Art

[0002] Existing portable oxygen cabins are all soft cabins, and their main structure is generally composed of two parts. One part is a rigid bracket that plays a supporting role inside, and the other part is a flexible shell made of a single layer of composite cloth. The process of setting up this soft cabin is as follows: First, assemble the rigid bracket according to the connection requirements, and then place the rigid bracket inside the flexible shell, and combine the two as required. After that, put the seats and cushions needed inside into it in turn. Finally, connect the external air source and fill the shell with compressed air to form the shell. After the shell is formed, outsiders can enter the shell, and then continue to fill the shell with compressed air to treat and care for the personnel.

[0003] The above existing soft cabins mainly have the following problems:

[0004] 1. Troublesome assembly and inconvenient entry and exit

[0005] The support of the shell is completely dependent on the internal rigid bracket, which has many assembly parts and is troublesome to install. At least two people are needed to complete the entire assembly process. The shell entrance of the current soft manned container mainly adopts a sealed zipper, and the entrance is sealed by a sealed zipper combined with an inflatable sealing ring. Due to the manufacturing process of the sealed zipper and the inflatable sealing ring, the shell entrance is small and it is difficult for people to enter and exit.

[0006] 2. No thermal insulation

[0007] Because the shell of the existing soft manned container is made of single-sided composite cloth, the thin shell itself does not have heat insulation function. Under high and low temperature conditions outdoors, an air-conditioning device needs to be separately configured inside the shell to adjust the temperature inside the shell to achieve the insulation effect.

[0008] 3. No negative pressure function

[0009] The shell of the existing portable soft cabin is a flexible structure made of a single layer of composite cloth, which cannot form negative pressure inside the oxygen cabin. Therefore, the negative pressure oxygen therapy function can only be used for oxygen cabins with rigid structures. Existing soft cabins cannot perform negative pressure oxygen therapy.

[0010] To sum up, for the current soft cabins, improving their assembly methods to make their assembly operations easier and faster, optimizing their structures to make it more convenient for people to enter and exit, adding negative pressure functions on the basis of their portability, and improving their functionality and comfort to obtain a better user experience will play a very important and positive role in the entire oxygen cabin industry. Summary of the invention

[0011] The present invention aims to solve the various deficiencies and defects mentioned in the background technology and provide a new type of portable positive and negative pressure oxygen chamber, which can not only be detached from the bracket and quickly inflated to self-form, realizing rapid assembly, but also enables the chamber body to have excellent thermal insulation and sealing properties, and also has both positive and negative pressure oxygen therapy functions.

[0012] To solve the above problems, the technical solution adopted by the present invention is:

[0013] A portable positive and negative pressure oxygen chamber, the chamber structure of which comprises:

[0014] A cylinder body, the interior of which can accommodate at least one user;

[0015] An end cover is fixed to the first end of the cylinder and seals the end;

[0016] a hatch, movably mounted on the second end of the cylinder, providing a user with access to or closing a passage to the interior of the cylinder;

[0017] Features:

[0018] The cylinder is formed by rolling an inflatable airtight composite plate, wherein the airtight composite plate includes a three-dimensional hollow woven fabric as an intermediate layer and coating layers respectively composited on the surfaces of both sides thereof;

[0019] The three-dimensional hollow woven fabric forms an air-filled cavity communicated with an external air path, and the coating layers on both sides are used to block and seal the air-filled cavity.

[0020] The cabin is equipped with a series of conventional oxygen cabin interfaces including an oxygen supply interface, a pressurization interface, a decompression interface, a sampling interface and a sewage discharge interface. The oxygen cabin interface is connected to the internal space of the cabin and can be installed on the end cover or the cylinder according to needs.

[0021] The end cover is a non-metal end cover, and the non-metal end cover is sealed and connected to the first end of the cylinder.

[0022] The end cover is a three-dimensional hollow woven fabric with a coating layer, and the inner coating layer of the three-dimensional hollow woven fabric is sealed and connected to the first end of the cylinder.

[0023] The hatch is movably mounted on the second end of the cylinder through a door frame and a door hinge; the door frame is composed of a metal core block and a non-metallic surface layer covering the outer periphery of the metal core block; the door frame is fixedly connected to the second end of the cylinder through its non-metallic surface layer.

[0024] An end surface connecting piece is provided at the second end of the cylinder, and the non-metal surface layer of the door frame is connected to the end surface connecting piece.

[0025] A first side connecting piece and a second side connecting piece are connected to the junction between the second end of the cylinder and the door frame; the first side connecting piece is attached to the outer side of the cylinder and the door frame, and the second side connecting piece is attached to the inner side of the cylinder and the door frame.

[0026] The non-metallic end cover and the first end of the cylinder, the coating layer of the three-dimensional hollow woven fabric and the first end of the cylinder, the non-metallic surface layer of the door frame and the second end of the cylinder, the end face connecting piece and the second end of the cylinder, the non-metallic surface layer of the door frame and the end face connecting piece, the first side connecting piece and the outer side surface of the junction of the cylinder and the door frame, and the second side connecting piece and the inner side surface of the junction of the cylinder and the door frame are all sealed by gluing, high-frequency heat sealing or mold pressure heat sealing.

[0027] The door hinge includes a hinge seat, a hinge shaft and a hinge plate. The hinge seat is fixedly connected to the door frame, and the hinge plate is fixedly connected to the cabin door. The hinge seat and the door frame are fixed by a connecting piece. The metal core block of the door frame serves as a connecting base to ensure the connection stability of the connecting piece.

[0028] The cabin is equipped with an inflatable base, which is made of a three-dimensional hollow woven fabric with a coating layer. The inflatable base and the cabin are independent inflatable structures, and the two are connected as a whole by gluing, high-frequency heat sealing or mold pressure heat sealing.

[0029] A portable positive and negative pressure oxygen chamber, comprising:

[0030] A cylinder body, the interior of which can accommodate at least one user;

[0031] Two end covers are provided and fixed to the two ends of the cylinder respectively to seal the two ends;

[0032] A zipper inlet and outlet is arranged in the middle of the cylinder to provide a user with a passage to or close the inside of the cylinder;

[0033] Its special features are:

[0034] The cylinder is formed by rolling an inflatable airtight composite plate, wherein the airtight composite plate includes a three-dimensional hollow woven fabric as an intermediate layer and coating layers respectively composited on the surfaces of both sides thereof;

[0035] The three-dimensional hollow woven fabric forms an air-filled cavity communicated with an external air path, and the coating layers on both sides are used to block and seal the air-filled cavity.

[0036] The end covers are respectively equipped with a positive pressure air supply port and a negative pressure air supply port. The cabin is connected to the positive pressure system through the positive pressure air supply port, and the cabin is connected to the negative pressure system through the negative pressure air supply port.

[0037] The end cover is a non-metallic end cover, and the non-metallic end cover is sealed and connected to the end of the cylinder.

[0038] The end cover is a three-dimensional hollow woven fabric with a coating layer, and the inner coating layer of the three-dimensional hollow woven fabric is sealed and connected to the end of the cylinder.

[0039] The zipper inlet and outlet are composed of an external zipper layer, an internal zipper layer and a closed air bag sandwiched between the external zipper layer and the internal zipper layer. The external zipper layer is provided with an external sealed zipper, the internal zipper layer is provided with an internal sealed zipper, and the closed air bag is connected to an external air pump.

[0040] The outer zipper layer and the inner zipper layer are both sealed and connected to the cylinder body via a connecting piece, and a plurality of connecting pieces may be provided to achieve sealing performance of the connection between the sealing zipper and the cylinder body.

[0041] The cabin is equipped with an inflatable base, which is made of a three-dimensional hollow woven fabric with a coating layer. The inflatable base and the cabin are independent inflatable structures, and the two are connected as a whole by gluing, high-frequency heat sealing or mold pressure heat sealing.

[0042] A portable positive and negative pressure oxygen chamber of the present invention uses a three-dimensional hollow woven fabric with a coating layer to make the cylinder of the oxygen chamber. When compressed air is filled into the middle of the three-dimensional hollow woven fabric, the high-strength fiber filaments are stretched to form an effective connection support body of two layers of brushed fabric. As a result, the cylinder no longer needs to rely on traditional rigid brackets and can quickly self-form after inflation. The construction time of traditional soft cabins is greatly shortened, making it more convenient for people to enter and exit. Since the cylinder is an independently inflated support body and is not connected to the space inside the cabin, in addition to the positive pressure function, it can also be connected to a negative pressure system to obtain both positive and negative pressure functions. The assembly of the cylinder, end cover, hatch, door frame and sealing zipper of the cabin can be carried out by the existing heat-sealing process. The cylinder made of three-dimensional hollow woven fabric with a coating layer can obtain a very good sealing effect. The door frame of the structure of the inner core plus the surface layer is compositely connected with the cylinder, which can effectively provide the rigid connection support and connection stability of the various parts of the cabin. The cabin of this structure can use either traditional sealing zippers or hatches with sealing locking mechanisms, thereby breaking the space limitation problem caused by traditional zipper sealing, and then the size of the cabin can be enlarged, and the sufficient internal space can be used by multiple people at the same time. In addition, the thickness of the three-dimensional hollow woven fabric can be adjusted as needed, and it has sufficient thickness after inflation, so that the cabin has very excellent sound insulation, heat insulation and thermal insulation properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 : Schematic diagram of the overall structure of the portable positive and negative pressure oxygen chamber of Example 1;

[0044] Figure 2 : Figure 1 Schematic diagram of cabin structure;

[0045] Figure 3 : A schematic diagram of the cabin structure of the portable positive and negative pressure oxygen cabin of the second embodiment;

[0046] Figure 4 : Schematic diagram of the overall structure of the portable positive and negative pressure oxygen chamber of embodiment 3

[0047] Figure 5 : Figure 4 Schematic diagram of cabin structure;

[0048] Figure 6 : A schematic diagram of the cabin structure of the portable positive and negative pressure oxygen cabin of the fourth embodiment;

[0049] Figure 7 : Schematic diagram of the structure of three-dimensional hollow woven fabric;

[0050] In the figure, 100, cabin, 101, cylinder, 101a, three-dimensional hollow core woven fabric, 101a-1, upper and lower layers of woven fabric, 101a-2, yarn or fabric, 101b, coating layer, 102, end cover, 103, cabin door, 104, door frame, 104a, metal core block, 104b, non-metallic surface layer, 105, door hinge, 105a, hinge seat, 105b, hinge plate, 105c, hinge shaft, 106, end face connecting piece, 107, first side connecting piece, 108, second side connecting piece, 109, connecting piece, 110, zipper inlet and outlet, 110a, external zipper layer, 110b, internal zipper layer, 110c, closed airbag, 111, locking mechanism, 200, control cabinet. DETAILED DESCRIPTION

[0051] Several specific embodiments of the present invention are given below in conjunction with the accompanying drawings to further illustrate the design concept, structural composition and working principle of the present invention in detail.

[0052] Embodiment 1

[0053] A portable positive and negative pressure oxygen chamber of the present embodiment includes a chamber body 100 and a control cabinet 200 arranged outside the shell 100. The chamber body 100 provides an internal treatment space. The control cabinet 200 has a touch control screen, a power switch, and various functional interfaces corresponding to and matching the functional interfaces configured on the chamber body 100. These functional interfaces include a series of conventional oxygen chamber interfaces such as an oxygen supply interface, a pressurization interface, a decompression interface, a sampling interface, and a sewage discharge interface.

[0054] The cabin 100 is a horizontal cylinder structure as a whole, and its structure includes a cylinder 101 providing an internal treatment space, an end cover 102 sealed and installed at the first end of the cylinder 101, and a hatch 103 movably installed at the second end of the cylinder 101 to provide the user with access to or close the internal passage of the cylinder; wherein the cylinder 101 is rolled by an inflatable airtight composite plate, and the airtight composite plate includes a three-dimensional hollow woven fabric 101a as an intermediate layer, and a coating layer 101b respectively compounded on its two side surfaces. The three-dimensional hollow woven fabric constitutes an inflatable cavity connected to the external air path, and the coating layers on both sides are used to block and seal the inflatable cavity. The size of the cylinder 101 is customized to accommodate at least one user. A transparent observation window is provided on the cylinder 101, and the observation window is sealed and integrated with the cylinder. The end cover 102 adopts an inflatable structure, which is a three-dimensional hollow woven fabric 101a with a coating layer 101b, and the inner coating layer 101b of the three-dimensional hollow woven fabric 101a is sealed and connected to the end of the cylinder 101. The second end of the cylinder 101 is equipped with a door frame 104, one end of the hatch 103 is movably connected to the door frame 104 through a door hinge 105, and the other end is sealed and locked with the door frame 104 through a locking mechanism 111; the door frame 104 is composed of a metal core block 104a and a non-metal surface layer 104b coated on the outer periphery of the metal core block 104a, and the second end of the cylinder 101 is provided with an end surface connecting piece 106, and the non-metal surface layer 104b of the door frame 104 is firmly connected to the end surface connecting piece 106 of the second end of the cylinder 101 by gluing, high-frequency heat sealing or mold pressure heat sealing.

[0055] In order to enhance the connection reliability between the cylinder body 101 and the door frame 104, a first side connecting piece 107 and a second side connecting piece 108 are connected to the joint between the second end of the cylinder body 101 and the door frame 104. The first side connecting piece 107 is attached to the outer side of the joint between the cylinder body 101 and the door frame 104, and the second side connecting piece 108 is attached to the inner side of the joint between the cylinder body 101 and the door frame 104. The first side connecting piece 107 and the second side connecting piece 108 are connected to the cylinder body 101 and the door frame 104 by gluing, high-frequency heat sealing or mold pressure heat sealing.

[0056] The door hinge 105 includes a hinge seat 105a, a hinge shaft 105c and a hinge plate 105b, wherein the hinge seat 105a is fixedly connected to the door frame 104, and the hinge plate 105b is fixedly connected to the cabin door 103. The hinge seat 105a is fixedly connected to the door frame 104 via a connector 109, and the metal core block 104a of the door frame 104 is used as a connection base, which can fully ensure the connection stability of the connector 109. Similarly, the locking mechanism 111 of the cabin door is connected to the cabin door at one end and connected to the door frame 104 at the other end, and the metal core block 104a of the door frame 104 is also used as a connection base, which fully ensures the connection stability of the locking mechanism.

[0057] The three-dimensional hollow woven fabric 101a includes two layers of woven fabric 101a-1 and yarn or fabric 101a-2 tied between the two layers of woven fabric 101a-1. These yarns or fabrics 101a-2 connect the two layers of woven fabric 101a-1 into a whole, and also have the functions of supporting, controlling height, and forming geometric shapes. The coating layer is applied to the two sides of the three-dimensional hollow woven fabric to form a closed interlayer space between the upper and lower layers of fabric. By providing an inflation interface on the cylinder 101, it is possible to inflate the closed interlayer space of the three-dimensional hollow woven fabric through the inflation interface, so that the cylinder made of the three-dimensional hollow woven fabric can quickly form an independent support frame through inflation.

[0058] The functional interface configured on the cabin 100 can be configured on the end cover 102 or on the cylinder 101. The pressurization interface and the decompression interface are connected to the positive pressure system and the negative pressure system respectively, so that the oxygen cabin has both positive and negative pressure treatment functions.

[0059] Embodiment 2

[0060] The difference between this embodiment and the first embodiment is that

[0061] The end cover 102 is made of non-metallic material.

[0062] The second end of the cylinder 101 adopts an end surface connecting piece 106, and the non-metal surface layer 104b of the door frame 104 is directly and firmly connected to the second end of the cylinder 101 by gluing, high-frequency heat sealing or mold pressure heat sealing.

[0063] In addition, the oxygen cabin of this embodiment is also equipped with an inflatable base for supporting the oxygen cabin. The inflatable base is made of a three-dimensional hollow woven fabric with a coating layer. The inflatable base and the cabin body are independent inflatable structures. The two are connected as a whole by gluing, high-frequency heat sealing or mold pressure heat sealing.

[0064] Embodiment 3

[0065] A portable positive and negative pressure oxygen chamber of the present embodiment includes a chamber body 100 and a control cabinet 200 arranged outside the shell 100. The chamber body 100 provides an internal treatment space. The control cabinet 200 has a touch control screen, a power switch, and various functional interfaces corresponding to and matching the functional interfaces configured on the chamber body 100. These functional interfaces include a series of conventional oxygen chamber interfaces such as an oxygen supply interface, a pressurization interface, a decompression interface, a sampling interface, and a sewage discharge interface.

[0066] The cabin 100 is a horizontal cylinder structure, which includes a cylinder 101 providing an internal treatment space, end caps 102 sealed at both ends of the cylinder 101, and a zipper entrance 110 arranged in the middle of the cylinder to provide users with access to or close the internal passage of the cylinder; the cylinder 101 is rolled from an inflatable airtight composite board, and the airtight composite board includes a three-dimensional hollow woven fabric 101a as an intermediate layer, and a coating layer 101b respectively compounded on the two side surfaces thereof. The size of the cylinder 101 is customized to accommodate at least one user. The end cap 102 is a non-metallic end cap made of PVC material. The zipper inlet and outlet 110 is composed of an external zipper layer 110a, an internal zipper layer 110b, and a closed air bag 110c sandwiched between the external zipper layer 110a and the internal zipper layer 110b. The external zipper layer 110a is provided with an external sealed zipper, and the internal zipper layer 110b is provided with an internal sealed zipper. The closed air bag 110c is connected to an external air pump through an inflation port. The external zipper layer 110a and the internal zipper layer 110b are both sealed and connected to the cylinder body through a connecting piece 106. A plurality of connecting pieces 106 can be provided to achieve a tight connection between the zipper inlet and outlet 110 and the cylinder body 101.

[0067] The three-dimensional hollow woven fabric includes two layers of woven fabric and yarns or fabrics pulled between the upper and lower layers of woven fabric. These yarns or fabrics connect the upper and lower layers of fabric into a whole, and also have the functions of supporting, controlling height, and forming geometric shapes. The coating layer is coated on both sides of the surface of the three-dimensional hollow woven fabric, so that a closed interlayer space can be formed between the upper and lower layers of fabric. By providing an inflation interface on the cylinder 101, it is possible to inflate the closed interlayer space of the three-dimensional hollow woven fabric through the inflation interface, so that the cylinder made of the three-dimensional hollow woven fabric can quickly form an independent support frame through inflation. The end caps are respectively equipped with a positive pressure air supply port and a negative pressure air supply port. The oxygen chamber is connected to the positive pressure system through the positive pressure air supply port, and the oxygen chamber is connected to the negative pressure system through the negative pressure air supply port.

[0068] The cabin is equipped with an inflatable base, which is made of a three-dimensional hollow woven fabric with a coating layer. The inflatable base and the cabin are independent inflatable structures, and the two are connected as a whole by gluing, high-frequency heat sealing or mold pressure heat sealing.

[0069] The functional interface configured on the cabin 100 can be configured on the end cover 102 or on the cylinder 101. The pressurization interface and the decompression interface are connected to the positive pressure system and the negative pressure system respectively, so that the oxygen cabin has both positive and negative pressure treatment functions.

[0070] Embodiment 4

[0071] The difference between this embodiment and the third embodiment is that

[0072] The end cover 102 adopts an inflatable structure, and the inflatable structure is a three-dimensional hollow woven fabric 101a with a coating layer 101b. The inner coating layer 101b of the three-dimensional hollow woven fabric 101a is sealed and connected to the end of the cylinder 101.

[0073] The oxygen cabin is also equipped with an inflatable base for supporting the oxygen cabin. The inflatable base is made of a three-dimensional hollow woven fabric with a coating layer. The inflatable base and the oxygen cabin are independent inflatable structures, and the two are connected as a whole by gluing, high-frequency heat sealing or mold pressure heat sealing.

[0074] Compared with the traditional portable soft cabin, the portable positive and negative pressure oxygen cabin of the present invention has the following outstanding advantages:

[0075] 1. The cylinder of the soft cabin is made of three-dimensional hollow woven fabric with a coating layer. When compressed air is filled in the middle of the three-dimensional hollow woven fabric, the tubular shell will be quickly formed. In this way, there is no need to set up a complex support frame inside the shell for forming and convenient entry and exit, which makes the early construction of the shell more efficient and labor-saving, and it is more convenient for people to enter and exit.

[0076] 2. The cabin molding process is simple, and various methods can be used to assemble and process the various parts, such as gluing, high-frequency heat sealing, mold pressure heat sealing, etc. Various small interfaces and fixed safety belts and straps that need to be set on the cabin can be fixed with the three-dimensional hollow woven fabric in a variety of connection methods.

[0077] 3. The three-dimensional hollow woven fabric with a coating layer can be made into plates of different shapes and thicknesses as needed. After being inflated, it has sufficient thickness, so not only the shell has the function of rapid prototyping, but also the cylinder has the functions of heat insulation, sound insulation and thermal insulation. When used outdoors, the cylinder can play a good role in heat insulation, sound insulation and thermal insulation, and generally no air conditioning device is required.

[0078] 4. The door frame made of metal core blocks can provide rigid connection support for the entire flexible cabin, effectively solving the firmness of the connection between various pipe fittings and the cabin.

[0079] 5. An inflatable three-dimensional hollow woven fabric is used as the cylinder, and is equipped with an independent inflation system, so that the cylinder shell and the internal space become two independent inflation chambers that are not connected to each other. After the cylinder is inflated, it serves as the support body of the cabin. At this time, the positive and negative pressure oxygen therapy functions can be obtained by pressurizing or depressurizing the interior of the cabin.

[0080] 6. The cabin body can be equipped with a base which is integrally connected thereto but each of which is filled with a different inflatable gas. The base is used as a support for the oxygen cabin and is integrally connected to the oxygen cabin, making it more convenient to carry and allowing the oxygen cabin to be set up quickly and efficiently.

Claims

1. A portable positive and negative pressure oxygen chamber, the structure of which include: A cylinder body, the interior of which can accommodate at least one user; An end cover is fixed to the first end of the cylinder and seals the end; a hatch, movably mounted on the second end of the cylinder, providing a user with access to or closing a passage to the interior of the cylinder; Features: The cabin is formed by rolling an inflatable airtight composite plate, wherein the airtight composite plate includes a three-dimensional hollow woven fabric as an intermediate layer and coating layers respectively composited on the surfaces of both sides thereof; The three-dimensional hollow woven fabric forms an air-filled cavity communicating with an external air path, and the coating layers on both sides are used to block and seal the air-filled cavity; The end cap is a dense solid end cap made of non-metallic material or an inflatable end cap made of a three-dimensional hollow woven fabric with a coating layer; The inflatable end cap is sealed and connected to the first end of the cylinder via the inner coating layer of the three-dimensional hollow core woven fabric; The door is movably mounted on the second end of the cylinder through a door frame and a door hinge; The door frame is composed of a metal core block and a non-metal surface layer covering the outer periphery of the metal core block; the door frame is fixedly connected to the second end of the cylinder through its non-metal surface layer; The second end of the cylinder is provided with an end surface connection piece, and the non-metal surface layer of the door frame is connected to the end surface connection piece; A first side connecting piece and a second side connecting piece are connected to the joint between the second end of the cylinder and the door frame; the first side connecting piece is attached to the outer side of the cylinder and the door frame, and the second side connecting piece is attached to the inner side of the cylinder and the door frame; The non-metallic end cap and the first end of the cylinder, the coating layer of the three-dimensional hollow woven fabric and the first end of the cylinder, the non-metallic surface layer of the door frame and the second end of the cylinder, the end surface connecting piece and the second end of the cylinder, the non-metallic surface layer of the door frame and the end surface connecting piece, the first side connecting piece and the outer side surface of the junction between the cylinder and the door frame, and the second side connecting piece and the inner side surface of the junction between the cylinder and the door frame are all sealed and connected by gluing, high-frequency heat sealing or mold pressure heat sealing; The door hinge includes a hinge seat, a hinge shaft and a hinge plate. The hinge seat is fixedly connected to the door frame, and the hinge plate is fixedly connected to the cabin door. The hinge seat and the door frame are fixed by a connecting piece. The metal core block of the door frame serves as a connecting base to ensure the connection stability of the connecting piece.

2. A portable positive and negative pressure oxygen chamber, include: A cylinder body, the interior of which can accommodate at least one user; Two end covers are provided and fixed to the two ends of the cylinder respectively to seal the two ends; A zipper inlet and outlet is arranged in the middle of the cylinder to provide a user with a passage to or close the inside of the cylinder; Features: The cylinder is formed by rolling an inflatable airtight composite plate, wherein the airtight composite plate includes a three-dimensional hollow woven fabric as an intermediate layer and coating layers respectively composited on the surfaces of both sides thereof; The three-dimensional hollow woven fabric forms an air-filled cavity communicating with an external air path, and the coating layers on both sides are used to block and seal the air-filled cavity; The end cap is a dense solid end cap made of non-metallic material or an inflatable end cap made of a three-dimensional hollow woven fabric with a coating layer; The inflatable end cap is sealed and connected to the first end of the cylinder via the inner coating layer of the three-dimensional hollow core woven fabric; The zipper inlet and outlet are composed of an external zipper layer, an internal zipper layer and a closed air bag sandwiched between the external zipper layer and the internal zipper layer, the external zipper layer is provided with an external sealed zipper, the internal zipper layer is provided with an internal sealed zipper, and the closed air bag is connected to an external air pump; The outer zipper layer and the inner zipper layer are both sealed and connected to the cylinder through a connecting piece, and a plurality of connecting pieces are provided to achieve sealing between the zipper inlet and outlet and the cylinder; The oxygen chamber is equipped with an oxygen supply interface, a pressurization interface, a decompression interface, a sampling interface and a sewage discharge interface which are installed on the end cover or the cylinder and communicated with the internal space of the chamber.

Images