Positive pressure breathing full face mask and positive pressure respirator

Abstract

The present invention relates to a positive pressure breathing full face mask and a positive pressure respirator, comprising: a face window covering the face; an oronasal mask covering the mouth and nose; an air supply valve connected to the oronasal mask; an exhalation valve connected to the oronasal mask; an annular sealing ring provided at the edge of the face window and having a slot; a sealing airbag provided in the slot for pressing the temples of the glasses against the face and forming a seal with the face; an airbag inflation port provided on the sealing airbag; and a pressure relief hole provided on the inner side of the sealing airbag for releasing gas into the facial area covered by the face window to form a positive pressure environment. The present invention utilizes the inflated sealing airbag to press the temples of the glasses against the face and fill the gap between the temples of the glasses and the face, thereby forming a complete seal between the full face mask and the face. Simultaneously, the pressure relief hole releases gas into the facial area covered by the face window, thereby forming a positive pressure environment in the facial area covered by the face window relative to the external area, greatly reducing the risk of toxic gases infiltrating into the facial area covered by the face window.

Description

Technical Field

[0001] The present invention relates to the field of respiratory equipment for emergency rescue and disaster relief, in particular to a positive pressure breathing full face mask and a positive pressure respirator. Background Art

[0002] A positive pressure respirator is a self-contained open air respirator, also known as a positive pressure respirator. It is an important personal protective equipment that can prevent firefighters and emergency rescue personnel from inhaling toxic and harmful gases, smoke, and harmful pollutants suspended in the air when fighting fires or performing emergency rescue operations.

[0003] In addition, positive pressure respirators can also be used in oxygen-deficient environments to prevent the inhalation of toxic gases, thereby effectively carrying out fire fighting, emergency rescue and labor operations.

[0004] The full-face masks of positive pressure respirators currently sold on the market mainly rely on silicone or rubber to form a sealing surface in contact with the face. Due to the elasticity limitations of the material, they are not suitable for people who wear glasses. When myopic people or people with other visual impairments wear full-face masks, the temples of the glasses easily form a gap between the sealing surface of the full-face mask and the wearer's face, resulting in a poor sealing effect. Therefore, when encountering a full-face mask used by a person wearing glasses, the person wearing glasses needs to take off their glasses to ensure that the full-face mask and face are in contact and form a good seal. However, when the person wearing glasses takes off their glasses, due to their own vision problems, they may not be able to see clearly. This makes it easy for the person wearing glasses to make misjudgments during emergency rescue operations, or the unclear vision may pose a great safety risk to the safe transfer of the person wearing glasses. Summary of the Invention

[0005] In order to make the full-face breathing mask suitable for people wearing glasses and to achieve a good seal to avoid the infiltration of toxic gases, the present invention provides a positive-pressure full-face breathing mask and a positive-pressure respirator, which utilize an inflated sealing airbag to squeeze the temples of the glasses onto the face and fill the gap between the temples of the glasses and the face, so that the full-face mask and the face are completely sealed. At the same time, the pressure relief hole releases gas to the facial area covered by the face window, so that the facial area covered by the face window forms a positive-pressure environment relative to the external area, greatly reducing the risk of toxic gases infiltrating into the facial area covered by the face window.

[0006] In a first aspect, the present invention provides a positive pressure breathing full face mask, which adopts the following technical solution:

[0007] A positive pressure breathing full face mask, comprising:

[0008] Face window, used to cover the face of the person;

[0009] The mouth and nose mask is located on the inside of the face window and is used to cover the mouth and nose of the person;

[0010] An air supply valve, connected to the mouth and nose mask, for providing oxygen;

[0011] An exhalation valve, connected to the mouth and nose mask, is used to discharge exhaled gas;

[0012] An annular sealing ring is provided at the edge of the face window and has a slot on the side facing away from the face window;

[0013] A sealing airbag is mounted in the card slot and is used to press the glasses leg onto the person's face and form a seal between the glasses leg and the person's face;

[0014] An airbag inflation port is provided on the sealed airbag and is used to inflate air into the sealed airbag;

[0015] The pressure relief hole is opened on the inner side of the sealed airbag and is used to release gas to the facial area covered by the face window, so that the facial area covered by the face window forms a positive pressure environment relative to the external area.

[0016] Preferably, there are two card slots, which are distributed inside and outside the annular sealing ring, and there are two sealing airbags, which are respectively located in the two card slots and are connected to each other.

[0017] Preferably, a positive pressure area is formed between the two sealed airbags.

[0018] Preferably, the full-face mask further comprises an elastic band for tying on a person's head, and the annular sealing mask is provided with a buckle, and the elastic band is fixed on the buckle.

[0019] Preferably, the oronasal mask is also provided with a regulating valve, the two ends of which are respectively connected to the mouth and nose area covered by the oronasal mask and the facial area covered by the mask, and the regulating valve is used to adjust the air pressure in the mouth and nose area covered by the oronasal mask.

[0020] In a second aspect, the present invention provides a positive pressure respirator, which adopts the following technical solution:

[0021] A positive pressure respirator, comprising the positive pressure full face mask described above, further comprising a gas cylinder, an air outlet pipe, a pressure reducing valve, a medium pressure air guide pipe and an air bag air guide pipe, wherein the two ends of the air outlet pipe are respectively connected to the air outlet end of the gas cylinder and the air inlet end of the pressure reducing valve, the two ends of the medium pressure air guide pipe are respectively connected to the air outlet end of the pressure reducing valve and the air supply valve, and the two ends of the air bag air guide pipe are respectively connected to the air outlet end of the pressure reducing valve and the air bag inflation port.

[0022] In summary, the present invention has the following beneficial technical effects:

[0023] 1. The present invention utilizes an inflated sealing airbag to squeeze the temples of the glasses onto the face and fill the gap between the temples of the glasses and the face, thereby forming a complete seal between the full-face mask and the face. At the same time, the pressure relief hole releases gas toward the facial area covered by the face window, so that the facial area covered by the face window forms a positive pressure environment relative to the external area, greatly reducing the risk of toxic gases penetrating into the facial area covered by the face window.

[0024] 2. The present invention provides two sealing air bags, so that the full-face mask can form two positive pressure environments, thereby further reducing the risk of toxic gases penetrating into the facial area covered by the face window and improving the safety of the full-face mask.

[0025] 3. The present invention improves the stability of the full-face mask when it is placed on the face of a person by providing an elastic band, making the full-face mask less likely to fall off.

[0026] 4. The present invention is provided with a regulating valve so that the regulating valve can adjust the air pressure in the mouth and nose area covered by the oronasal mask so that people can breathe better. At the same time, the regulating valve can also serve as an emergency treatment. That is, when the breathing valve is blocked, the regulating valve can discharge the exhaled gas in the mouth and nose area covered by the oronasal mask; or, when the air supply valve is blocked, the regulating valve can allow the oxygen in the positive pressure environment in the facial area covered by the face window to enter the mouth and nose area covered by the mouth and nose, so that people can perform emergency breathing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a simple schematic diagram of a full-face mask according to an embodiment of the present invention (wherein the face window is transparent and the oronasal mask portion is highlighted to show the mouth and nose mask; in fact, the oronasal mask is located inside the face window);

[0028] Figure 2 yes Figure 1 Rear view;

[0029] Figure 3 2 is a schematic diagram of the cross-sectional structure of a full-face mask according to an embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the sealing airbag in different states on the annular sealing ring;

[0031] Figure 5 Schematic diagram of a respirator according to an embodiment of the present invention (A is a state after the sealed airbag is inflated, and B is a state before the sealed airbag is inflated).

[0032] Explanation of the accompanying reference numerals: 11. face window; 12. oral and nasal mask; 13. air supply valve; 14. exhalation valve; 15. annular sealing ring; 151. slot; 152. buckle; 16. sealing airbag; 161. clamping part; 162. airbag part; 17. airbag inflation port; 18. regulating valve; 100. gas cylinder; 200. air outlet pipe; 300. pressure reducing valve; 400. medium-pressure air duct; 500. airbag air duct. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] The embodiment of the invention discloses a positive pressure breathing full face mask.

[0035] Reference Figure 1 The positive pressure breathing full face mask includes a face window 11, a mouth and nose mask 12, an air supply valve 13, an exhalation valve 14, an annular sealing ring 15 and a sealing air bag 16.

[0036] The face window 11 is positioned to cover the user's face. The face window 11 is made of a transparent material, such as polycarbonate, plastic, or glass. In this embodiment, the face window 11 is made of polycarbonate. Polycarbonate has high transparency and strong wear resistance. In addition, polycarbonate has an anti-fog function, which prevents the inner wall of the face window 11 from fogging during use, thereby preventing the user from seeing clearly.

[0037] Reference Figure 1 and Figure 2 The oronasal mask 12 is formed on the inner side of the face window 11. The oronasal mask 12 is used to cover the mouth and nose of the user. When in use, the oronasal mask 12 covers the user's mouth and nose, while the face window 11 covers the user's face. The oronasal mask 12 can be made of medical rubber to reduce the impact of the oronasal mask 12 on the user's breathing.

[0038] The air supply valve 13 is connected to the oronasal mask 12 , wherein the air supply valve 13 can be installed on the face window 11 or the oronasal mask 12 , and the air supply valve 13 is used to provide oxygen to the mouth and nose of the user covered by the oronasal mask 12 .

[0039] The exhalation valve 14 is connected to the oronasal mask 12, wherein the exhalation valve 14 can be installed on the face window 11 or the oronasal mask 12. The exhalation valve 14 is used to discharge the gas exhaled by the user. When in use, the user exhales the gas into the mouth and nose covered by the oronasal mask 12, and then the exhaled gas is discharged through the exhalation valve 14.

[0040] The exhalation valve 14 and the air supply valve 13 are both one-way air valves. The air supply valve 13 can only provide oxygen to the mouth and nose, and the exhalation valve 14 can only discharge the gas exhaled by the user.

[0041] Reference Figure 1 and Figure 3 An annular sealing ring 15 is disposed at the edge of the face window 11. The annular sealing ring 15 is made of a deformable material, such as rubber, a polymer material, or silicone. In this embodiment, the annular sealing ring 15 is made of rubber. Furthermore, a retaining groove 151 is defined on the side of the annular sealing ring 15 facing away from the face window 11. The retaining groove 151 is located on the inner side of the annular sealing ring 15 and is arranged in an annular shape.

[0042] Reference Figure 3 and Figure 4 The sealing airbag 16 is clamped in the clamping slot 151. The sealing airbag 16 includes a clamping portion 161 and an airbag portion 162, wherein the clamping slot 151 and the clamping portion 161 can be a T-shaped structure that can be used in conjunction with each other. The clamping portion 161 is clamped in the clamping slot 151 and extends along the clamping slot 151. The airbag portion 162 is located outside the annular sealing ring 15, and a part of the clamping portion 161 extends out of the clamping slot 151, and the part of the clamping portion 161 extending out of the clamping slot 151 is connected to the airbag portion 162. The airbag portion 162 and the clamping portion 161 are integrally formed, and a closed area is formed between the airbag portion 162 and the clamping portion 161. The airbag portion 162 can expand and become larger after inflation, and squeeze the temples of the glasses onto the face of the person, thereby forming a seal between the sealing airbag 16 and the face of the person.

[0043] Reference Figure 1 The airbag inflation port 17 is formed on the sealing airbag 16 , and the airbag inflation port 17 is used to inflate the sealing airbag 16 .

[0044] The pressure relief hole is opened on the inner side of the sealing airbag 16, and the pressure relief hole is a micro hole. When the sealing airbag 16 is filled with gas, the gas in the sealing airbag 16 can release gas to the facial area covered by the face window 11 through the pressure relief hole, so that the facial area covered by the face window 11 always forms a positive pressure environment relative to the external area. Therefore, during the use of the full-face mask, the air pressure in the facial area covered by the face window 11 is greater than the external air pressure, and the gas in the facial area covered by the face window 11 can be discharged to the external environment through the gap between the sealing airbag 16 and the person's face, which also makes it difficult for external toxic gases to enter the facial area covered by the face window 11 through the gap between the sealing airbag 16 and the person's face. The full-face mask greatly improves safety.

[0045] When the sealed airbag 16 is filled with gas, the airbag portion 162 of the sealed airbag 16 will expand and squeeze the legs of the glasses onto the face of the user. At the same time, the pressure relief hole releases gas to the facial area covered by the face window 11, so that the facial area covered by the face window 11 presents a positive pressure environment, reducing the risk of toxic gas entering the facial area covered by the face window 11 and improving the safety of the full-face mask.

[0046] Further, refer to Figure 2 and Figure 3 In another embodiment, the number of the card slots 151 is two, and the two card slots 151 are distributed inside and outside on the annular sealing ring 15. At the same time, the number of the sealing airbags 16 is also two, and the two sealing airbags 16 are respectively installed in the two card slots 151, and the two sealing airbags 16 are connected, and the two sealing airbags 16 are also distributed inside and outside.

[0047] In addition, the airbag inflation port 17 can be formed on any one of the sealed airbags 16 or at the connection point between two sealed airbags 16 .

[0048] In addition, pressure relief holes are provided on the inner sides of both sealed airbags 16. When both sealed airbags 16 are filled with gas, a positive pressure area is formed between the two sealed airbags 16. Gas discharged from the pressure relief hole on the inner sealed airbag 16 enters the facial area covered by the face window 11, thereby maintaining a positive pressure environment in the facial area covered by the face window 11. Gas discharged from the pressure relief hole on the outer sealed airbag 16 enters the positive pressure area between the two sealed airbags 16, thereby also maintaining a positive pressure environment in the positive pressure area. By providing two positive pressure environments, it is more difficult for external toxic gases to enter the facial area covered by the face window 11 through the gap between the sealed airbags 16 and the user's face, further improving safety.

[0049] Further, refer to Figure 1 The full-face mask further includes an elastic band and a buckle 152. The buckle 152 is formed on the annular sealing ring 15 and is integrally formed with the annular sealing ring 15. There are at least two buckles 152. Both ends of the elastic band can be wrapped around and fixed to the buckle 152. When in use, when a person presses the face window 11 against the face, the elastic band can be tied to the head, thereby ensuring the stability of the full-face mask on the person's face.

[0050] Further, refer to Figure 1 The full-face mask also includes a regulating valve 18, which is installed on the oronasal mask 12. The two ends of the regulating valve 18 are respectively connected to the mouth and nose area covered by the oronasal mask 12 and the facial area covered by the face window 11. The regulating valve 18 can adjust the air pressure between the mouth and nose area covered by the oronasal mask 12 and the facial area covered by the face window 11.

[0051] In addition, when the air supply valve 13 or the air supply pipeline or one of the breathing valves is blocked, the person can discharge the exhaled gas from the mouth and nose area covered by the oronasal mask 12 through the regulating valve 18, or supply oxygen in the facial area covered by the face window 11 to the mouth and nose covered by the oronasal mask 12 through the regulating valve 18, so that the person can breathe normally, and at the same time, the gas released from the pressure relief hole is continuously replenished to the facial area covered by the face window 11.

[0052] The embodiment of the present invention further discloses a positive pressure respirator, which includes a positive pressure breathing full face mask disclosed in the above embodiment, and Figure 1 and Figure 5 The positive pressure breathing apparatus also includes a gas cylinder 100, an air outlet pipe 200, a pressure reducing valve 300, a medium pressure air guide tube 400 and an air bag air guide tube 500.

[0053] The gas cylinder 100 is filled with compressed air or compressed oxygen. The two ends of the gas outlet pipe 200 are respectively connected to the gas outlet end of the gas cylinder 100 and the gas inlet end of the pressure reducing valve 300. The pressure reducing valve 300 is used to reduce the pressure of the gas discharged from the gas cylinder 100 through the gas pipe and reduce the pressure to medium pressure, where the pressure range of medium pressure is 0.6MPa-0.9Mpa.

[0054] The two ends of the medium-pressure air guide tube 400 are respectively connected to the air outlet of the pressure reducing valve 300 and the air supply valve 13 , and the two ends of the airbag air guide tube 500 are respectively connected to the air outlet of the pressure reducing valve 300 and the airbag inflation port 17 .

[0055] Among them, a one-way valve can be installed on the air outlet pipe 200, the medium-pressure air guide pipe 400 and the air bag air guide pipe 500, and the one-way valve only allows gas to flow out of the gas cylinder and flow towards the full-face mask.

[0056] In addition, the positive pressure breathing apparatus also includes other necessary parts, such as shoulder straps, north support, waist belt set, quick connector, pressure gauge, etc., which are not shown in the figure.

[0057] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A positive pressure breathing full face mask, characterized in that: include: Face window, used to cover the face of the person; The mouth and nose mask is located on the inside of the face window and is used to cover the mouth and nose of the person; An air supply valve, connected to the mouth and nose mask, for providing oxygen; An exhalation valve, connected to the mouth and nose mask, is used to discharge exhaled gas; An annular sealing ring is provided at the edge of the face window and has a slot on the side facing away from the face window; A sealing airbag is mounted in the card slot and is used to press the glasses leg onto the person's face and form a seal between the glasses leg and the person's face; An airbag inflation port is provided on the sealed airbag and is used to inflate air into the sealed airbag; A pressure relief hole is provided on the inner side of the sealed airbag, for releasing gas to the facial area covered by the face window, thereby forming a positive pressure environment in the facial area covered by the face window relative to the external area; The full face mask also includes a regulating valve, which is installed on the oronasal mask. The two ends of the regulating valve are respectively connected to the mouth and nose area covered by the oronasal mask and the facial area covered by the face window. The regulating valve is used to adjust the air pressure between the mouth and nose area covered by the oronasal mask and the facial area covered by the face window. When one of the air supply valve, air supply line or breathing valve is blocked, the person will discharge the exhaled gas from the mouth and nose area covered by the oronasal mask through the regulating valve, or supply oxygen in the facial area covered by the face window to the mouth and nose covered by the oronasal mask through the regulating valve, so that the person can breathe normally. At the same time, the gas released from the pressure relief hole is continuously replenished to the facial area covered by the face window.

2. A positive pressure breathing full face mask according to claim 1, characterized in that: There are two card slots, which are distributed inside and outside the annular sealing ring. There are two sealing airbags, which are respectively located in the two card slots and are connected to each other.

3. A positive pressure breathing full face mask according to claim 2, characterized in that: A positive pressure area is formed between the two sealed airbags.

4. A positive pressure breathing full face mask according to claim 1, characterized in that: The full-face mask also includes an elastic band for being tied to a person's head. A buckle is provided on the annular sealing ring, and the elastic band is fixed on the buckle.

5. A positive pressure respirator comprising a positive pressure full face mask according to any one of claims 1 to 4, characterized in that: The positive pressure respirator also includes a gas cylinder, an air outlet pipe, a pressure reducing valve, a medium-pressure air guide tube and an air bag air guide tube. The two ends of the air outlet pipe are respectively connected to the air outlet end of the gas cylinder and the air inlet end of the pressure reducing valve, the two ends of the medium-pressure air guide tube are respectively connected to the air outlet end of the pressure reducing valve and the air supply valve, and the two ends of the air bag air guide tube are respectively connected to the air outlet end of the pressure reducing valve and the air bag inflation port.

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