A respirator

Abstract

The present application relates to a respirator. The respirator (1) comprises: a relatively fixed top plate (10) and a bottom plate (60) spaced apart by a predetermined distance; a spring assembly (20), the upper end of which is connected to the bottom of the top plate; an airbag baffle (30), connected to the lower end of the spring assembly; a breathing airbag (40), which contains gas for breathing, and the breathing airbag can change between an expanded state and a collapsed state under the action of the amount of gas contained therein and the force applied by the spring assembly; and an air distribution valve (50), which is mounted on the bottom plate and located in a recess (402) of a first wall (401); in the collapsed state of the breathing airbag, the second wall abuts against the inner side of the recess, causing the recess to deform in a direction toward the air distribution valve, thereby contacting and opening the air distribution valve. According to the present application, the respirator can achieve automatic inflation, and the air distribution valve is located outside the breathing airbag and the gas passage as a whole, which is convenient for assembly and maintenance.

Description

Technical Field

[0001] The present application relates to the technical field of respirators, and in particular, to a respirator. Background Art

[0002] A respirator is a device that uses an additional air source to assist breathing. It is widely used in firefighting, chemical industry, shipping, petroleum, smelting, warehouses, laboratories, mines and other scenarios, or to assist people with insufficient breathing ability to breathe.

[0003] CN207306953U discloses an artificial respirator for treating cardiovascular diseases, comprising a respirator support plate and a respirator main body, wherein universal movable wheels are installed at the four corners of the lower end of the respirator support plate, and the universal movable wheels are composed of a movable wheel fixing part, a movable wheel rotating part, a movable wheel main body and a movable wheel brake plate, two tank limit blocks are installed on one side of the upper end of the respirator support plate, an oxygen tank is installed above the tank limit blocks, an oxygen tank is installed at the upper end of the oxygen tank, an oxygen tank valve is installed at the upper end of the oxygen tank, and a tank interface valve is installed at one end of the oxygen tank valve, the respirator main body is composed of a respirator rotating shaft, a rear one-way valve, a rear fixing part, a breathing airbag, a front fixing part, a front one-way valve, a breathing mask rotating shaft, a breathing mask and a replaceable rubber pad, and the rear fixing part is installed at the upper end of the breathing airbag.

[0004] CN202526533U relates to a lung function rehabilitation device, comprising a working host, a gas connecting device and a compressed air bag; the working host comprises a compressed air pump, a pressure gas storage device, a distribution air valve and an output gas connecting device; the working host is connected to the compressed air bag through the gas connecting device.

[0005] CN109966606A relates to a respiratory therapy system having two respiratory therapy devices that can be operated separately and independently of each other. The respiratory therapy devices each have a control device and an instrument component that can be controlled by the control device and is used to provide the device functions. A coupling device is provided for establishing an operative connection between the two respiratory therapy devices. The coupling device is suitable for and designed to control the control devices of the two respiratory therapy devices when the operative connection is established. The coupling device can be used to functionally expand and / or replace the instrument component of one respiratory therapy device with the instrument component of another respiratory therapy device.

[0006] In existing rebreather protection devices, including those described in the aforementioned documents, the air distribution valve (automatic air supply device) is typically located or partially located within the airbag, often inserted into the airbag. The airbag baffle presses down on a lever inside the air distribution valve, causing it to open. Alternatively, the air distribution valve requires additional control mechanisms, preventing it from automatically completing the inflation process. This requires increased coordination between the airbag and the air distribution valve. Furthermore, the air distribution valve comes into contact with the air inside the airbag, increasing cleaning requirements.

[0007] The prior art also discloses a respirator in which a protective cover is added inside the breathing airbag to separate the gas distribution valve from the gas in the airbag. However, this makes the breathing airbag of the respirator more complex and increases the cost.

[0008] Therefore, there is a need for a respirator that is low in cost and does not require high cleaning requirements for the breathing bag and the air distribution valve, and there is also a need for a respirator that can achieve automatic inflation only through the matching structure between the breathing bag and the air distribution valve. Summary of the Invention

[0009] The technical problems of the prior art can be solved by the respirator of the present application. The present application provides a low-cost respirator that does not require high cleaning requirements for the breathing bag and the air distribution valve, and also provides a respirator that can achieve automatic inflation only through the matching structure between the breathing bag and the air distribution valve.

[0010] Specifically, according to one aspect of the present application, a respirator is provided, comprising: a relatively fixed top plate and a bottom plate, which are spaced a predetermined distance apart; a spring assembly having an upper end and a lower end, and having a compressed state and an extended state, the upper end of the spring assembly being connected to the bottom of the top plate; an airbag baffle connected to the lower end of the spring assembly; a breathing airbag, which contains gas for breathing, the breathing airbag being arranged between the airbag baffle and the bottom plate, and having a first wall and a second wall relative to each other, the first wall facing the bottom plate, the second wall facing the airbag baffle, a deformable recess being provided on the first wall, the airbag baffle being arranged to abut against the second wall and transmit the force applied by the spring assembly to the breathing airbag, the breathing airbag containing gas in it and a control panel comprising: 1. The control panel comprises a pair of control panels, wherein the control panel comprises a pair of control panels, wherein the control panel comprises a first panel and a second panel, and the second panel comprises a first panel and a second panel. The control panel comprises a first panel and a second panel. The control panel comprises a first panel and a second panel. The control panel comprises a first panel and a second panel. The control panel comprises a first panel and a second panel.

[0011] Furthermore, a deformable convex portion matching the shape of the concave portion is provided on the second wall, and the airbag baffle is configured to be able to abut against the convex portion and transmit the force applied by the spring assembly to the breathing airbag. The concave portion and the convex portion can be nested together, and under the action of the airbag baffle, the convex portion and the concave portion are deformed in a direction toward the air distribution valve, thereby contacting and opening the air distribution valve.

[0012] Furthermore, the breathing airbag also includes an airbag side wall, which includes a first section located at the bottom and a second section located at the top. The first section is cylindrical and the second section is frustum-shaped that tapers upward. When the breathing airbag is in a collapsed state, the second section is folded inside the first section.

[0013] Furthermore, the airbag side wall further includes a middle connecting section, which is located between the first section and the second section and extends inward from the upper end of the first section to form an arc shape.

[0014] Furthermore, the spring assembly includes a plurality of positive pressure springs evenly distributed between the top plate and the airbag baffle.

[0015] Further, the gas distribution valve is configured to close after losing contact with the recess.

[0016] Furthermore, the air distribution valve is configured to: after being opened for a predetermined time, automatically close when the breathing airbag is transitioning towards its expanded state; or automatically close when the expanded state of the breathing airbag is reached.

[0017] Furthermore, the concave portion and the convex portion are located at the center of the first wall and the second wall respectively.

[0018] Furthermore, the cross section of the concave portion and / or the convex portion is arc-shaped.

[0019] With the respirator according to the present application, the air distribution valve can be separated from the air bag by means of a new air bag structure. Furthermore, the use of the new air bag structure reduces process complexity, thereby reducing costs. The external, separate structure of the air bag and the air distribution valve reduces maintenance steps, eliminating the need to remove and reinsert the air distribution valve into the air bag. Therefore, the present application provides a low-cost respirator that does not require high cleaning requirements for the air bag and the air distribution valve, and also provides a respirator that can achieve automatic inflation solely through the matching structure between the air bag and the air distribution valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0021] Figure 1 A schematic diagram of how to use a respirator;

[0022] Figure 2 is a simplified schematic diagram of a respirator according to one embodiment of the present application;

[0023] Figure 3 is a simplified schematic diagram of a respirator according to another embodiment of the present application;

[0024] Figure 4 for Figure 3 a simplified schematic diagram of a respirator in a collapsed state; and

[0025] Figure 5 FIG1 is a partial bottom view of an air distribution valve of a respirator according to one embodiment of the present application; DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. 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.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0029] Figure 1 This is a schematic diagram of the use of a respirator, illustrating the use of the respirator and its breathing bag and air distribution valve described in this application. The breathing bag, carbon dioxide absorption tank, cooling tank and human body form a breathing circuit.

[0030] When exhaling, the gas exhaled by the human body contains carbon dioxide and first passes through a carbon dioxide absorption tank. Here, the carbon dioxide is absorbed and then enters the breathing bag. At this point, the breathing bag is inflated. When inhaling, the human body inhales the bag gas (which is now carbon dioxide-free). The gas is cooled by the cooling tank and then inhaled into the human body. At this point, the breathing bag is low in air or even deficient.

[0031] In both the low-air and low-air states, the breathing airbag is in a deflated state. However, the difference is that in the low-air state, the airbag baffle does not touch the bottom plate and the air distribution valve is not open; in the low-air state, the airbag baffle touches the bottom plate, triggering the air distribution valve to open.

[0032] The oxygen consumed during breathing can be Figure 1 The "quantified oxygen supply" shown is supplemented by the gas distribution valve as an automatic supplement when the gas volume is insufficient. Non-limitingly, the gas distribution valve can also be used for an oxygen respirator that supplies air on demand, directly supplying air on demand (without quantitative oxygen supply) only through the gas distribution valve.

[0033] Please refer to Figures 2 to 4 , the working principle of the respirator of the present application will be described in detail below. Figure 2 is a simplified schematic diagram of a respirator according to one embodiment of the present application.

[0034] Figure 2 A respirator 1 is shown, comprising: a relatively fixed top plate 10 and a bottom plate 60, which are separated by a predetermined distance; a spring assembly 20, having an upper end and a lower end, and having a compressed state and an extended state, the upper end of the spring assembly 20 being connected to the bottom of the top plate 10; and an airbag baffle 30, connected to the lower end of the spring assembly 20.

[0035] The respirator 1 also includes: a breathing airbag 40, which contains gas for breathing. The breathing airbag 40 is arranged between the airbag baffle 30 and the base plate 60, and has a first wall 401 and a second wall 403 facing each other. The first wall 401 faces the base plate 60, and the second wall 403 faces the airbag baffle 30. A deformable recess 402 is provided on the first wall 401. The airbag baffle 30 is configured to abut against the second wall 403 and transmit the force applied by the spring assembly 20 to the breathing airbag 40. The breathing airbag 40 can change between an expanded state and a collapsed state under the action of the amount of gas it contains and the force applied by the spring assembly 20.

[0036] The respirator 1 further includes: an air distribution valve 50, which is mounted on the base plate 60 and located in the recess 402 of the first wall 401. The air distribution valve 50 has an inlet 501 connected to a gas source and an outlet 502 connected to the breathing bag 40. When the air distribution valve 50 is opened, the gas source is fluidically connected to the breathing bag 40, thereby inflating the breathing bag 40.

[0037] In the inflated state of the breathing airbag 40, the first wall 401 and the second wall 403 are at a maximum distance apart. In the collapsed state of the breathing airbag 40, the first wall 401 and the second wall 403 are at a minimum distance apart. Under the action of the airbag baffle 30, the second wall 403 abuts against the inner side of the recess 402, causing the recess 402 to deform in the direction toward the air distribution valve 50, thereby contacting and opening the air distribution valve 50.

[0038] Due to the novel push-button gas distribution valve structure, the airbag baffle 30 above the breathing airbag 40 is convenient for triggering and closing the gas distribution valve 50. The overall structure of the breathing airbag 40 and the external gas distribution valve 50 avoids direct contact between the outside of the gas distribution valve 50 and the breathing gas.

[0039] Next reference Figure 3 . Figure 3 is a simplified schematic diagram of a respirator according to another embodiment of the present application.

[0040] In this embodiment, a deformable protrusion 404 matching the shape of the recess 402 is provided on the second wall 403 , and the airbag baffle 30 is configured to abut against the protrusion 404 and transmit the force applied by the spring assembly 20 to the breathing airbag 40 .

[0041] Please refer to Figure 4 , Figure 4 for Figure 3 The concave portion 402 and the convex portion 404 can be nested together, and under the action of the airbag baffle 30, the convex portion 404 and the concave portion 402 are deformed in a direction toward the air distribution valve 50, thereby contacting and opening the air distribution valve 50.

[0042] Due to the novel structure of the breathing airbag, the manufacturing difficulty of the breathing airbag is reduced and the service life of the breathing airbag is increased.

[0043] The breathing airbag 40 further includes an airbag sidewall, which includes a first section located at the bottom and a second section located at the top. Figure 3 The first section is cylindrical, and the second section is a frustum that tapers upward. When the breathing bag is in a collapsed state, the second section is folded inside the first section.

[0044] The airbag side wall further includes a middle connecting section, which is located between the first section and the second section and extends inward from the upper end of the first section to form an arc shape.

[0045] The spring assembly 20 includes a plurality of positive pressure springs evenly distributed between the top plate 10 and the airbag baffle 30. For example and not limitation, the spring assembly 20 includes two positive pressure springs 201 and 202.

[0046] The air distribution valve 50 can be configured to close after losing contact with the recess 402. Therefore, air can be replenished immediately after heavy breathing with a large inhalation volume, and when heavy breathing is quickly converted to light breathing (the large amount of air inhaled in heavy breathing is not completely consumed and returns to the breathing bag 40), air can be replenished slowly.

[0047] Optionally, the air distribution valve 50 can also be configured to automatically close after being opened for a predetermined time as the breathing bag 40 transitions toward its inflated state, or automatically close when the inflated state of the breathing bag 40 is reached. This can be achieved by providing the air distribution valve 50 with a delay valve function, thereby enabling sufficient or quantitative air supply.

[0048] Preferably, the concave portion 402 and the convex portion 404 may be located at the center of the first wall 401 and the second wall 403 respectively.

[0049] Preferably, in order to better match the concave portion 402 with the convex portion 404 , the cross section of the concave portion 402 and / or the convex portion 404 is arc-shaped.

[0050] The present application also provides a breathing airbag 40 that contains gas for breathing and has a first wall 401 and a second wall 403 that are opposite to each other. The first wall 401 is provided with a deformable recess 402. A gas distribution valve 50 can be accommodated in the recess 402 and can be activated when the breathing airbag 40 is in a collapsed state.

[0051] Preferably, a deformable convex portion 404 matching the shape of the concave portion 402 is provided on the second wall 403 .

[0052] The present application also provides a method for using the respirator 1, which includes: S1 using a breathing bag 40 filled with gas to supply gas to a user; S2 when the breathing bag 40 moves to its collapsed state, the recess 402 triggers the opening of the gas distribution valve 50, thereby inflating the breathing bag 40 from a gas source; S3 when the gas distribution valve 50 is closed after being inflated to the point where it loses contact with the recess 402; and S4 using the breathing bag 40 again to supply gas to the user.

[0053] Therefore, it is possible to immediately replenish air after heavy breathing with a large inspiratory volume, and to slowly replenish air when the heavy breathing is quickly converted to light breathing (the large amount of air inhaled in the heavy breathing is not completely consumed and returns to the breathing airbag 40).

[0054] Furthermore, in the above method, step S3 is replaced by step S3'. Step S3' is: when the breathing bag 40 is inflated to its expanded state, the air distribution valve 50 is closed. Therefore, the method can achieve quantitative air supply.

[0055] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0056] With the respirator according to the present application, the air distribution valve can be separated from the air bag by means of a new air bag structure. Furthermore, the use of the new air bag structure reduces process complexity, thereby reducing costs. The external, separate structure of the air bag and the air distribution valve reduces maintenance steps, eliminating the need to remove and reinsert the air distribution valve into the air bag. Consequently, the present application provides a low-cost respirator that does not require high cleaning requirements for the air bag and the air distribution valve, and also provides a respirator that can achieve automatic inflation solely through the coordination between the air bag and the air distribution valve.

[0057] The use of the structure of the breathing airbag according to the present application reduces the difficulty of manufacturing the breathing airbag and increases the life of the breathing airbag.

[0058] By using the method for using the respirator of the present application, automatic cyclic breathing can be achieved more stably and reliably.

[0059] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A respirator (1), comprising: A top plate (10) and a bottom plate (60) are relatively fixed and spaced apart by a predetermined distance; A spring assembly (20) having an upper end and a lower end, and having a compressed state and an extended state, wherein the upper end of the spring assembly (20) is connected below the top plate (10); an airbag baffle (30) connected to the lower end of the spring assembly (20); A breathing airbag (40) containing gas for breathing, the breathing airbag (40) being arranged between the airbag baffle (30) and the base plate (60), and having a first wall (401) and a second wall (403) facing each other, the first wall (401) facing the base plate (60), the second wall (403) facing the airbag baffle (30), the first wall (401) being provided with a deformable recess (402), the airbag baffle (30) being arranged to abut against the second wall (403) and transmit the force applied by the spring assembly (20) to the breathing airbag (40), the breathing airbag (40) being able to change between an expanded state and a collapsed state under the action of the amount of gas contained therein and the force applied by the spring assembly (20); an air distribution valve (50) mounted on the bottom plate (60) and located in the recess (402) of the first wall (401), the air distribution valve (50) having an inlet (501) connected to a gas source and an outlet (502) connected to the breathing airbag (40), wherein when the air distribution valve (50) is opened, the gas source is in fluid communication with the breathing airbag (40), thereby inflating the breathing airbag (40); In the expanded state of the breathing airbag (40), the first wall (401) and the second wall (403) are at a maximum distance from each other, and in the collapsed state of the breathing airbag (40), the first wall (401) and the second wall (403) are at a minimum distance from each other, and under the action of the airbag baffle (30), the second wall (403) abuts against the inner side of the recess (402), causing the recess (402) to deform in a direction toward the air distribution valve (50), thereby contacting and opening the air distribution valve (50).

2. The respirator (1) according to claim 1, characterized in that The second wall (403) is provided with a deformable convex portion (404) that matches the shape of the concave portion (402), and the airbag baffle (30) is configured to abut against the convex portion (404) and transmit the force applied by the spring assembly (20) to the breathing airbag (40). The concave portion (402) and the convex portion (404) can be nested together, and under the action of the airbag baffle (30), the convex portion (404) and the concave portion (402) are deformed in a direction toward the air distribution valve (50), thereby contacting and opening the air distribution valve (50).

3. The respirator (1) according to claim 1, characterized in that The breathing airbag (40) further includes an airbag sidewall, which includes a first section located at the bottom and a second section located at the top, the first section being cylindrical, and the second section being a frustum that tapers upward, and when the breathing airbag is in a collapsed state, the second section is folded inside the first section.

4. The respirator (1) according to claim 3, characterized in that The airbag side wall further includes a middle connecting section, which is located between the first section and the second section and extends inward from the upper end of the first section to form an arc shape.

5. The respirator (1) according to claim 1, characterized in that The spring assembly (20) includes a plurality of positive pressure springs evenly distributed between the top plate (10) and the airbag baffle (30).

6. The respirator (1) according to claim 1, characterized in that The gas distribution valve (50) is configured to close after losing contact with the recess (402).

7. The respirator (1) according to claim 1, characterized in that The gas distribution valve (50) is configured as follows: After being opened for a predetermined time, the breathing bag (40) automatically closes during the transition to its expanded state; or When the inflated state of the breathing bag is reached, it closes automatically.

8. The respirator (1) according to claim 2, characterized in that The concave portion (402) and the convex portion (404) are respectively located at the center of the first wall (401) and the second wall (403).

9. The respirator (1) according to claim 2, characterized in that The cross section of the concave portion (402) and / or the convex portion (404) is arc-shaped.

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