Positive pressure breathing full face mask and positive pressure respirator

Abstract

The invention relates to a positive-pressure breathing full face mask and a positive-pressure respirator, and the positive-pressure breathing full face mask comprises a face window which covers the face; the mouth-nose mask covers the mouth and the nose; the air supply valve is communicated with the mouth-nose mask; the exhalation valve is communicated with the mouth-nose mask; the annular sealing ring is arranged on the edge of the side window and provided with a clamping groove; the sealing air bag is arranged in the clamping groove and is used for extruding the glasses legs onto the face and forming sealing with the face; the air bag inflation inlet is formed in the sealing air bag; the pressure relief hole is formed in the inner side of the sealing air bag and used for releasing air to the face area covered by the face window to form a positive pressure environment. According to the invention, the inflated sealing air bags are utilized to extrude the glasses legs onto the face, and the gaps between the glasses legs and the face are filled, so that the full face mask and the face are completely sealed, and meanwhile, the pressure relief holes release gas to the face area covered by the face window, so that the face area covered by the face window forms a positive pressure environment relative to the external area; the risk that poisonous gas permeates into the face area covered by the face window is greatly reduced.

Description

Technical Field

[0001] The 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 sealing method of the full-face mask of the positive pressure respirator currently sold on the market mainly relies on silicone or rubber to fit the face to form a sealing surface. Due to the elasticity limitation of the material, it cannot be adapted to people who wear glasses. When myopic people or other people with visual impairments wear full-face masks, the legs of the glasses easily form a gap between the sealing surface of the full-face mask and the face of the wearer, resulting in poor sealing effect. Therefore, when encountering a person wearing glasses using a full-face mask, the person wearing glasses needs to take off the glasses so that the full-face mask and the face can fit together to form a good seal. However, when the person wearing glasses takes off the glasses, due to their own vision problems, they will not be able to see clearly, which makes it easy for the person wearing glasses to make misjudgments during the rescue process, or the unclear vision brings great safety risks 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 good sealing 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, and 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, thereby greatly reducing the risk of toxic gases infiltrating into the facial area covered by the face window.

[0006] In the 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] A face window is used to cover the face of a person;

[0009] The mouth and nose mask is located on the inner side 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, for expelling exhaled gas;

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

[0013] A sealing airbag is clamped in the clamping slot and is used to press the legs of the glasses onto the face of the person and form a seal between the legs of the glasses and the face of the person;

[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, the number of the card slots is two, and the two card slots are distributed inside and outside the annular sealing ring, and the number of the sealing airbags is two, and the two sealing airbags are respectively located in the two card slots, and the two sealing airbags are connected.

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

[0018] Preferably, the full-face mask further comprises an elastic band for tying on the head of a person, and a buckle is provided on the annular sealing mask, 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 air 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 breathing full face mask described above, the positive pressure respirator also 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, 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 includes 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, 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, which greatly reduces 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, so that the full-face mask is not easy to fall off.

[0026] 4. The present invention provides a regulating valve so that the regulating valve can adjust the air pressure in the mouth and nose area covered by the mouth and nose mask so that people can breathe better. At the same time, the regulating valve can also play an emergency role. 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 mouth and nose 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 in an embodiment of the present invention (wherein the face window is transparent, and in order to show the mouth and nose mask, the mouth and nose mask is partially protruded, and in fact the mouth and nose mask is located inside the face window);

[0028] Figure 2 yes Figure 1 Rear view of

[0029] Figure 3 is a schematic diagram of the cross-sectional structure of a full-face mask in 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 It is a simple schematic diagram of the respirator in an embodiment of the present invention (wherein A is the state after the sealed airbag is inflated, and B is the state before the sealed airbag is inflated).

[0032] Explanation of the reference numerals in the accompanying drawings: 11. face window; 12. mouth and nose 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 is further described in detail below in conjunction with 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 comprises 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 provided to cover the face of the user, and is made of a transparent material, such as polycarbonate, plastic, or glass. In the present embodiment, the face window 11 is made of polycarbonate. Polycarbonate has the functions of high transparency and strong wear resistance, and also has an anti-fog function, so that during the use of the face window 11, water mist is not easy to be generated on the inner wall thereof, and the sight of the user is not affected.

[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 mouth and nose of the user, and at the same time, the face window 11 covers the face of the user. The oronasal mask 12 can be made of medical rubber material to reduce the impact of the oronasal mask 12 on the breathing of the user.

[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] Both the exhalation valve 14 and the air supply valve 13 are 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 The annular sealing ring 15 is arranged at the edge of the face window 11, wherein the annular sealing ring 15 is made of a deformable material, such as rubber, polymer material or silicone. In this embodiment, the annular sealing ring 15 is made of rubber. In addition, a slot 151 is provided at the side end of the annular sealing ring 15 away from the face window 11, and the slot 151 is provided at the inner side end of the annular sealing ring 15, and the slot 151 is distributed in an annular shape.

[0042] Reference Figure 3 and Figure 4 The sealing airbag 16 is clamped in the clamping slot 151, and 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, 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, and 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 sealing airbag 16 is filled with gas, the airbag portion 162 of the sealing airbag 16 will expand and squeeze the temples 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 gases 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 connecting point between two sealed airbags 16 .

[0048] In addition, pressure relief holes are provided on the inner sides of the two sealed airbags 16. After the two sealed airbags 16 are filled with gas, a positive pressure area is formed between the two sealed airbags 16, and the gas discharged from the pressure relief hole on the inner sealed airbag 16 enters the facial area covered by the face window 11, so that the facial area covered by the face window 11 always maintains a positive pressure environment; the gas discharged from the pressure relief hole on the outer sealed airbag 16 enters the positive pressure area between the two sealed airbags 16, and the positive pressure environment is also always maintained in the positive pressure area. By setting up 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 airbag 16 and the face of the person, further improving safety.

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

[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 in addition, 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, wherein the pressure range of the 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 end 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 end 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 the 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 connectors, 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 protection scope 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 protection scope of the present invention.

Claims

1. A positive pressure breathing full face mask, characterized in that: include: A face window is used to cover the face of a person; The mouth and nose mask is located on the inner side 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, for expelling exhaled gas; An annular sealing ring is arranged at the edge of the face window, and a slot is provided on the side facing away from the face window; A sealing airbag is clamped in the clamping slot and is used to press the legs of the glasses onto the face of the person and form a seal between the legs of the glasses and the face of the person; An airbag inflation port is provided on the sealed airbag and is used to inflate air into the sealed airbag; 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.

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

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 used for tying on the head of a person, and a buckle is provided on the annular sealing mask, and the elastic band is fixed on the buckle.

5. A positive pressure breathing full face mask according to claim 1, characterized in that: 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 air is used to adjust the air pressure in the mouth and nose area covered by the oronasal mask.

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

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