Oxygen supply device and oxygen supply system for respirator

Abstract

The present application relates to an oxygen supply device and an oxygen supply system for a respirator, comprising a connecting pipe connected to an automatic air supply component, the other end of the connecting pipe passes through a sealing cover and is connected to a first chamber, the automatic air supply component has a first connecting end and a second connecting end, the first connecting end is connected to the second chamber, and the second connecting end is connected to an external oxygen supply device, when the gas in the second chamber decreases, the elastic diaphragm assembly moves away from the sealing cover to connect the first connecting end and the second connecting end of the automatic air supply component, when the gas in the second chamber increases to a preset pressure, the elastic diaphragm assembly moves close to the sealing cover, the pressure in the first chamber increases, so that the connection between the first connecting end and the second connecting end of the automatic air supply component is closed, thereby realizing that the opening and closing of the air supply are relatively sensitive and the reliability is high, and it is not easy to lose position during the expansion and contraction of the air storage chamber, and there will be no problem of failure of the entire device.

Description

Technical Field

[0001] The present application relates to the field of oxygen supply equipment, and in particular to an oxygen supply device for a respirator, and an oxygen supply system comprising the oxygen supply device for a respirator. Background Art

[0002] At present, the automatic air supply device used in the respirator mainly includes an air bag, a positive pressure plate, a positive pressure spring, a fixed plate, an automatic supply valve, and a limiter. When in use, as the oxygen is consumed, the pressure in the air bag drops, and the positive pressure plate moves downward under the action of the positive pressure spring to gradually shrink the air bag. When the positive pressure plate touches the rocker of the automatic supply valve, the rocker of the automatic supply valve tilts at an angle to open the valve, thereby realizing automatic supply and inflation. The role of the limiter is to prevent the positive pressure plate from losing its position and causing the entire air supply device to fail. However, the automatic supply valve is placed in the air bag, and the tilted opening method of the rocker causes insufficient air supply, which makes the rocker easy to bend and deform, resulting in insensitive opening of the valve and poor reliability. In addition, the positive pressure plate is easy to lose its position during the expansion and contraction of the air bag, causing the entire air supply device to fail. Summary of the invention

[0003] The present application provides an oxygen supply device and an oxygen supply system for a respirator, so as to solve the problem that the automatic supply valve is placed in the airbag, the rocker is tilted to open, there is insufficient air supply, the rocker is easy to bend and deform, resulting in insensitive opening of the valve, poor reliability, and the positive pressure plate is easy to lose its position during the expansion and contraction of the airbag, causing the entire air supply device to fail.

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the first aspect of the present application provides an oxygen supply device for a respirator, comprising: an air storage chamber, an elastic diaphragm assembly, a sealing cover and an automatic air supply assembly;

[0005] The sealing cover is disposed on the air storage cavity, and the elastic diaphragm assembly is disposed in the air storage cavity and divides the air storage cavity and the sealing cover into a first chamber and a second chamber;

[0006] The automatic air-filling component includes an automatic air-filling part and a connecting pipe connected to the automatic air-filling part, the other end of the connecting pipe passes through the sealing cover and is connected to the first chamber, the automatic air-filling part has a first connecting end and a second connecting end, the first connecting end is connected to the second chamber, and the second connecting end is connected to an external oxygen supply device. When the gas in the second chamber decreases, the elastic diaphragm assembly moves away from the sealing cover to connect the first connecting end and the second connecting end of the automatic air-filling part. When the gas in the second chamber increases to a preset pressure, the elastic diaphragm assembly moves close to the sealing cover, and the pressure in the first chamber increases, so that the connection between the first connecting end and the second connecting end of the automatic air-filling part is closed.

[0007] Optionally, the automatic air supply component includes a housing, a first valve cover, a valve core, a piston and a connecting rod;

[0008] The housing has a first accommodating cavity, and the first valve cover has a second accommodating cavity, wherein the first connecting end and the second connecting end are both in communication with the first accommodating cavity;

[0009] The first valve cover is disposed on the housing, the valve core is disposed in the first accommodating cavity, and the outer side wall of the valve core abuts against the inner side wall of the first accommodating cavity;

[0010] The valve core is connected to one end of the connecting rod, and the other end of the connecting rod is connected to the piston. The piston is arranged in the second accommodating chamber, and the second accommodating chamber is connected to the connecting pipe, so that the piston reciprocates in the second accommodating chamber, and the connecting rod drives the valve core to reciprocate in the first accommodating chamber, so that the first connecting end and the second connecting end are connected or closed to the first accommodating chamber.

[0011] Optionally, a channel tube is provided on the shell, the channel tube faces the first accommodating cavity, and the connecting rod extends into the first accommodating cavity along the channel tube and is connected to the valve core.

[0012] Optionally, the automatic air-filling component also includes a first spring and a second spring, a first accommodating groove and a second accommodating groove are provided on the valve core at intervals, the first accommodating groove is communicated with the second accommodating groove, the first accommodating groove is communicated with the first accommodating cavity, a part of the first spring is sleeved on the outer wall of the channel tube, another part of the first spring extends into the first accommodating groove, the second spring is arranged in the second accommodating groove, and the connecting rod passes through the first spring and the second spring in sequence and is connected to the bottom of the second accommodating groove.

[0013] Optionally, the automatic air-filling component also includes a plug, which is sealed on the second accommodating groove and located at the bottom of the valve core. The connecting rod is connected to the plug, and the connecting rod reciprocates to drive the plug, so that the plug drives the valve core to reciprocate in the first accommodating chamber.

[0014] Optionally, the automatic air supply component further includes a first sealing component, which is disposed on an outer side wall of the valve core and is close to ports of the first connecting end and the second connecting end.

[0015] Optionally, the automatic air supply component further includes a second valve cover, the second valve cover is arranged on the first valve cover, the second valve cover is provided with a connecting hole, and the connecting pipe is connected to the connecting hole.

[0016] Optionally, the elastic diaphragm assembly includes a surrounding frame, an elastic sheet and a plurality of supporting members;

[0017] The surrounding frame is arranged around the elastic sheet, the plurality of supporting members are arranged on the elastic sheet in a staggered manner, and the ends of the plurality of supporting members are connected to the surrounding frame.

[0018] Optionally, a plurality of third connection ends are provided on the gas storage cavity, the plurality of third connection ends are communicated with the second chamber, and the plurality of third connection ends are supplied to the target object through gas.

[0019] A second aspect of the present application provides an oxygen supply system, comprising an oxygen supply device for a respirator as described above.

[0020] The present application comprises an automatic air-filling component and a connecting pipe connected to the automatic air-filling component, the other end of the connecting pipe passes through the sealing cover and is connected to the first chamber, the automatic air-filling component has a first connecting end and a second connecting end, the first connecting end is connected to the second chamber, and the second connecting end is connected to an external oxygen supply device. When the gas in the second chamber decreases, the elastic diaphragm assembly moves away from the sealing cover to connect the first connecting end and the second connecting end of the automatic air-filling component. When the gas in the second chamber increases to a preset pressure, the elastic diaphragm assembly moves close to the sealing cover, and the pressure in the first chamber increases, so that the connection between the first connecting end and the second connecting end of the automatic air-filling component is closed, thereby realizing that the opening and closing of the air supply are relatively sensitive and the reliability is high. In addition, it is not easy to lose position during the expansion and contraction of the air storage chamber, and the problem of failure of the entire device will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 A schematic diagram of an oxygen supply device of a respirator provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of an oxygen supply device of a respirator provided in an embodiment of the present application from another angle;

[0025] Figure 3 For Figure 1 A schematic cross-sectional view along the BB direction is shown;

[0026] Figure 4 A schematic diagram showing specific components of an oxygen supply device of a respirator provided in an embodiment of the present application.

[0027] The following are the names and numbers of the main components of this application:

[0028] Gas storage chamber 10, first chamber 11, second chamber 12;

[0029] Elastic diaphragm assembly 20, surrounding frame 21, elastic sheet 22, support member 23, third connection end 24;

[0030] Sealing cover 30;

[0031] Automatic air replenishing assembly 40, automatic air replenishing part 41, connecting pipe 42, shell 440, first valve cover 401, valve core 44, piston 45, connecting rod 46, first accommodating chamber 411, second accommodating chamber 421, channel tube 431, first spring 47, second spring 48, first accommodating groove 441, second accommodating groove 442, plug 49, first sealing part 50, second valve cover 402, connecting hole 412, first connecting end 43-1, second connecting end 43-2, vent hole 4110. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] like Figure 1As shown, in the first aspect, an oxygen supply device of a respirator is provided, comprising: an air storage chamber 10, an elastic diaphragm assembly 20, a sealing cover 30 and an automatic air supply assembly 40; the sealing cover 30 is covered on the air storage chamber 10, the elastic diaphragm assembly 20 is arranged in the air storage chamber 10 and divides the air storage chamber 10 and the sealing cover 30 into a first chamber 11 and a second chamber 12; the automatic air supply assembly 40 comprises an automatic air supply component 41 and a connecting pipe 42 connected to the automatic air supply component 41, the other end of the connecting pipe 42 passes through the sealing cover 30 and is connected to the first chamber 11, the automatic air supply component 41 has a first connecting end 43-1 and a second connecting end 43-2. The first connection end 43-1 is connected to the second chamber 12, and the second connection end 43-2 is connected to the external oxygen supply equipment. When the gas in the second chamber 12 decreases, the elastic diaphragm assembly 20 moves away from the sealing cover 30 to make the first connection end 43-1 of the automatic air supply component 41 connected to the second connection end 43-2. ​​When the gas in the second chamber 12 increases to a preset pressure, the elastic diaphragm assembly 20 moves close to the sealing cover 30, and the pressure in the first chamber 11 increases, so that the connection between the first connection end 43-1 and the second connection end 43-2 of the automatic air supply component 41 is closed. Thereby, the opening and closing of the air supply are relatively sensitive and the reliability is high. In addition, the air storage chamber 10 is not easy to lose its position during the expansion and contraction process, and the problem of failure of the entire device will not occur. Optionally, the air storage chamber 10 can be a box structure made of hard material.

[0034] Optionally, when the oxygen in the second chamber 12 is consumed and the pressure in the second chamber 12 is reduced, the elastic diaphragm assembly 20 will expand downward, that is, the elastic diaphragm assembly 20 moves away from the sealing cover 30, so that the volume of the first chamber 11 increases, the pressure in the first chamber 11 decreases, and the automatic air replenishment assembly 40 is triggered to open so that the first connection end 43-1 and the second connection end 43-2 are connected and oxygen is replenished in the second chamber 12. When the oxygen is continuously replenished in the second chamber 12 and the pressure in the second chamber 12 increases, the elastic diaphragm assembly 20 will be compressed upward, that is, the elastic diaphragm assembly 20 moves close to the sealing cover 30, the volume of the first chamber 11 decreases, and the automatic air replenishment assembly 40 is triggered to close so that the first connection end 43-1 and the second connection end 43-2 cannot be connected and stop replenishing oxygen to the second chamber 12. This cycle is repeated to achieve automatic air replenishment and maintain the oxygen pressure in the second chamber 12 in a positive pressure state.

[0035] Optionally, the automatic air filling component 41 includes a shell 440, a first valve cover 401, a valve core 44, a piston 45 and a connecting rod 46; the shell 440 has a first accommodating chamber 411, the first valve cover 401 has a second accommodating chamber 421, wherein the first connecting end 43-1 and the second connecting end 43-2 are both connected to the first accommodating chamber 411; the first valve cover 401 is arranged on the shell 440, the valve core 44 is arranged in the first accommodating chamber 411, and the outer wall of the valve core 44 is connected to the inner wall of the first accommodating chamber 411. The side wall abuts; the valve core 44 is connected to one end of the connecting rod 46, the other end of the connecting rod 46 is connected to the piston 45, the piston 45 is arranged in the second accommodating chamber 421, and the second accommodating chamber 421 is connected to the connecting pipe 42, so that the piston 45 reciprocates in the second accommodating chamber 421, and the connecting rod 46 drives the valve core 44 to reciprocate in the first accommodating chamber 411, so that the first connecting end 43-1 and the second connecting end 43-2 are connected or closed to the first accommodating chamber 411.

[0036] It should be noted that when the elastic diaphragm assembly 20 expands downward, the pressure in the first chamber 11 decreases to generate a suction force, which can cause the piston 45 to move upward in the second accommodating chamber 421, and the piston 45 drives the connecting rod 46 to move upward, and the connecting rod 46 drives the valve core 44 to move upward in the first accommodating chamber 411, so that the valve core 44 generates a gap in the first accommodating chamber 411, and the gap can connect the first connecting end 43-1 and the second connecting end 43-2, so that the gas is passed into the second chamber 12. The diaphragm assembly 20 will be compressed upward, and the pressure in the first chamber 11 will increase to generate a thrust, which can cause the piston 45 to move downward in the second accommodating chamber 421, and the piston 45 drives the connecting rod 46 to move downward, and the connecting rod 46 drives the valve core 44 to move downward in the first accommodating chamber 411, so that the valve core 44 is reset in the first accommodating chamber 411, and the gap generated by the previous rise of the valve core 44 is filled, so that the first connecting end 43-1 and the second connecting end 43-2 are not connected, thereby blocking the gas from passing into the second chamber 12.

[0037] Optionally, a channel tube 431 is provided on the housing 440, and the channel tube 431 faces the first accommodating chamber 411, and the connecting rod 46 extends into the first accommodating chamber 411 along the channel tube 431 and is connected to the valve core 44. Specifically, the channel tube 431 enables the connecting rod 46 to stably extend into the first accommodating chamber 411, and the housing 440 is also provided with a vent hole 4110, which is spaced from the channel tube 431 and communicates with the first accommodating chamber 411, so that the first accommodating chamber 411 and the second accommodating chamber 421 are ventilated, which is the same as the outside atmosphere, so as to reduce the resistance of the valve core 44 during movement and improve the sensitivity of the valve core 44, that is, to achieve the reciprocating motion of the piston 45 in the second accommodating chamber 421, and to enable the connecting rod 46 to drive the valve core 44 to reciprocate in the first accommodating chamber 411.

[0038] In one embodiment, the automatic air replenishing component 41 also includes a first spring 47 and a second spring 48, and a first accommodating groove 441 and a second accommodating groove 442 are spaced apart on the valve core 44, the first accommodating groove 441 is communicated with the second accommodating groove 442, the first accommodating groove 441 is communicated with the first accommodating chamber 411, a portion of the first spring 47 is sleeved on the outer wall of the channel tube 431, and another portion of the first spring 47 extends into the first accommodating groove 441, and the second spring 48 is arranged in the second accommodating groove 442, and the connecting rod 46 passes through the first spring 47 and the second spring 48 in sequence and is connected to the bottom of the second accommodating groove 442. Optionally, the automatic air-filling component 41 also includes a plug 49, which is sealingly arranged on the second accommodating groove 442, and the plug 49 is located at the bottom of the valve core 44, the connecting rod 46 is connected to the plug 49, and the connecting rod 46 reciprocates to drive the plug 49, so that the plug 49 drives the valve core 44 to reciprocate in the first accommodating chamber 411.

[0039] Optionally, the plug 49 has a certain elastic force. When the connecting rod 46 is subjected to an upward pulling force, the connecting rod 46 drives the valve core 44 to move upward in the first accommodating chamber 411, and the plug 49 overcomes the resistance of the second spring 48 and moves upward until the plug 49 contacts the boss provided in the second accommodating groove 442, and then drives the valve core 44 to overcome the resistance of the reset first spring 47 and continue to move upward. At this time, the valve core 44 will generate a space in the first accommodating chamber 411, and the space enables the first connecting end 43-1 to communicate with the second connecting end 43-2, that is, the automatic air replenishment component 40 is opened and the gas is replenished in the second chamber 12. Therefore, the second spring 48 can play a buffering role to prevent small pressure fluctuations from frequently opening the connection between the first connecting end 43-1 and the second connecting end 43-2, causing instability of the device. As the air replenishment proceeds, the elastic diaphragm assembly 20 will be compressed upward, causing the vacuum degree in the first chamber 11 to decrease, the tension of the connecting rod 46 to decrease, and the valve core 44 will contact the bottom of the first accommodating chamber 411 under the action of the first spring 47. The plug 49 will contact the bottom of the first accommodating chamber 411 under the action of the second spring 48. At this time, the first connecting end 43-1 and the second connecting end 43-2 are completely disconnected, that is, the automatic air replenishment assembly 40 is closed and stops passing gas into the second chamber 12.

[0040] In one embodiment, the automatic air supply component 41 further includes a first seal 50, which is disposed on the outer side wall of the valve core 44 and is close to the ports of the first connection end 43-1 and the second connection end 43-2. ​​Specifically, the first seal 50 ensures that the first connection end 43-1 and the second connection end 43-2 will not leak.

[0041] In one embodiment, the automatic air supply component 41 further includes a second valve cover 402, the second valve cover 402 is disposed on the first valve cover 401, a connecting hole 412 is provided on the second valve cover 402, and the connecting pipe 42 is connected to the connecting hole 412. Specifically, when the volume in the first chamber 11 increases, a negative pressure is generated, so that the pulling force is transmitted from the first chamber 11 to the connecting hole 412, and the pulling force of the connecting hole 412 is transmitted to the second accommodating chamber 421, so that the piston 45 moves upward in the second accommodating chamber 421. When the volume in the first chamber 11 decreases, a thrust is generated, so that the thrust is transmitted from the first chamber 11 to the connecting hole 412, and the thrust of the connecting hole 412 is transmitted to the second accommodating chamber 421, so that the piston 45 moves downward in the second accommodating chamber 421.

[0042] In one embodiment, the elastic diaphragm assembly 20 includes a frame 21, an elastic sheet 22, and a plurality of support members 23; the frame 21 is arranged around the elastic sheet 22, the plurality of support members 23 are arranged on the elastic sheet 22 in an alternating manner, and the ends of the plurality of support members 23 are connected to the frame 21. Optionally, the elastic sheet 22 may be a curved surface or a flat surface, specifically an arc surface, and the elastic sheet 22 has a restoring force and is always in a compressed state to maintain the gas in the lower second chamber 12 to maintain a positive pressure.

[0043] Optionally, a plurality of third connection ends 24 are provided on the gas storage cavity 10, the plurality of third connection ends 24 are communicated with the second chamber 12, and the plurality of third connection ends 24 are supplied to the target object through gas.

[0044] The second aspect of the present application provides an oxygen supply system, including an oxygen supply device for a respirator as described in any one of the above. Optionally, the automatic replenishment component 20 of the oxygen supply system of the present application has a simple structure and high working reliability, and the automatic replenishment component 20 is placed outside the second chamber 12, which is convenient for the inspection and maintenance of the automatic replenishment component 20 to ensure stable and reliable gas replenishment to the second chamber 12. The automatic replenishment component 20 is controlled by the vacuum degree in the first chamber 11, and the opening sensitivity is high, ensuring stable and reliable gas replenishment to the second chamber 12. The automatic replenishment component 20 adopts the axial movement of the valve core 44 to open, which can realize large-flow gas replenishment and quickly fill the second chamber 12 with gas. The entire oxygen supply system has a compact structure and saves space.

[0045] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0046] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An oxygen supply device for a respirator, characterized in that: include: Air storage chamber, elastic diaphragm assembly, sealing cover and automatic air replenishment assembly; The sealing cover is disposed on the air storage cavity, and the elastic diaphragm assembly is disposed in the air storage cavity and divides the air storage cavity and the sealing cover into a first chamber and a second chamber; The automatic air-filling component comprises an automatic air-filling part and a connecting pipe connected with the automatic air-filling part, the other end of the connecting pipe passes through the sealing cover and is connected with the first chamber, the automatic air-filling part has a first connecting end and a second connecting end, the first connecting end is connected with the second chamber, and the second connecting end is connected with an external oxygen supply device, when the gas in the second chamber decreases, the elastic diaphragm component moves away from the sealing cover to make the first connecting end and the second connecting end of the automatic air-filling part connected, when the gas in the second chamber increases to a preset pressure, the elastic diaphragm component moves close to the sealing cover, the pressure in the first chamber increases, so that the connection between the first connecting end and the second connecting end of the automatic air-filling part is closed; The automatic air supply component includes a housing, a first valve cover, a valve core, a piston and a connecting rod; The housing has a first accommodating cavity, and the first valve cover has a second accommodating cavity, wherein the first connecting end and the second connecting end are both in communication with the first accommodating cavity; The first valve cover is disposed on the housing, the valve core is disposed in the first accommodating cavity, and the outer side wall of the valve core abuts against the inner side wall of the first accommodating cavity; The valve core is connected to one end of the connecting rod, and the other end of the connecting rod is connected to the piston. The piston is arranged in the second accommodating chamber, and the second accommodating chamber is connected to the connecting pipe, so that the piston reciprocates in the second accommodating chamber, and the connecting rod drives the valve core to reciprocate in the first accommodating chamber, so that the first connecting end and the second connecting end are connected or closed to the first accommodating chamber; The housing is provided with a channel tube, the channel tube faces the first accommodating cavity, the connecting rod extends into the first accommodating cavity along the channel tube and is connected to the valve core; The automatic air replenishing component also includes a first spring and a second spring. A first accommodating groove and a second accommodating groove are provided on the valve core at intervals. The first accommodating groove is communicated with the second accommodating groove. The first accommodating groove is communicated with the first accommodating cavity. A portion of the first spring is sleeved on the outer side wall of the channel tube, and another portion of the first spring extends into the first accommodating groove. The second spring is arranged in the second accommodating groove. The connecting rod passes through the first spring and the second spring in sequence and is connected to the bottom of the second accommodating groove.

2. The oxygen supply device of the respirator according to claim 1, characterized in that: The automatic air-filling component also includes a plug, which is sealed on the second accommodating groove and located at the bottom of the valve core. The connecting rod is connected to the plug, and the connecting rod reciprocates to drive the plug, so that the plug drives the valve core to reciprocate in the first accommodating chamber.

3. The oxygen supply device of the respirator according to claim 2, characterized in that: The automatic air supply component further includes a first sealing component, which is disposed on an outer side wall of the valve core and is close to ports of the first connection end and the second connection end.

4. The oxygen supply device of the respirator according to claim 1, characterized in that: The automatic air supply component further includes a second valve cover, which is arranged on the first valve cover. The second valve cover is provided with a connecting hole, and the connecting pipe is connected to the connecting hole.

5. The oxygen supply device of the respirator according to claim 1, characterized in that: The elastic diaphragm assembly comprises a surrounding frame, an elastic sheet and a plurality of supporting members; The surrounding frame is arranged around the elastic sheet, the plurality of supporting members are arranged on the elastic sheet in a staggered manner, and the ends of the plurality of supporting members are connected to the surrounding frame.

6. The oxygen supply device of the respirator according to claim 1, characterized in that: The gas storage cavity is provided with a plurality of third connection ends, the plurality of third connection ends are communicated with the second chamber, and the plurality of third connection ends are supplied to the target object through gas.

7. An oxygen supply system, characterized in that: An oxygen supply device comprising the respirator according to any one of claims 1 to 6.

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