Mask anti-condensation inner liner for low temperature environments

Abstract

The present application relates to the technical fields of medical protection, in particular to a mask anti-condensation lining for low-temperature environment, comprising a shell, a sealing rubber strip, a sealing rubber pad, a rubber pad shaping device and a positioner, the shell is composed of a main shell, an exhalation tube, a mask connecting piece and an inhalation check valve, the main shell is a left-right symmetrical plastic shell structure, used for buckling on the mouth, the middle part is convex to cover the mouth, and the upper end is concave to be located on the nose; the exhalation tube is a U-shaped tube, one end of which is fixedly connected to the side surface of the main shell, and the other end is fixedly connected with the non-woven fabric surface of the mask through the mask connecting piece; the inhalation check valve is installed at the convex part of the middle part of the main shell, and the valve plate is opened inward, the airflow in the mask is changed into semi-one-way flow by the inhalation check valve, the high-humidity gas exhaled is discharged from the non-woven fabric filter layer of the specific range of the mask, and the air tightness failure of the mask due to wetness when worn in cold environment is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical protection, in particular to a mask anti-condensation lining for low-temperature environment. BACKGROUND

[0002] The mask prevents the harm of infectious diseases and dust to the human body by filtering air during breathing. The filter layer of the common medical mask is non-woven fabric. In order to ensure the filtering effect, the medical mask with high protection standard requires not only to improve the filter layer, but also to improve the air tightness of the contact part between the mask and the face. Therefore, the common mask has a wide structure wrapping the zygomatic bone and the entire mandible, and a bendable and shaped metal strip is arranged at the contact part of the nasal back and the nasal face groove to prevent air leakage.

[0003] In the low-temperature environment below 0 degrees Celsius such as winter outdoor in the north or cold storage, the exhaled gas is relatively high in humidity and high in temperature compared with the external air. When wearing the mask, the high-humidity gas will condense water while passing through the non-woven fabric filter layer. Some of the condensed water is in the form of fog and is scattered, and some of the condensed water is retained on the non-woven fabric filter layer, causing the mask to be wet. After the mask is wet, the air permeability resistance of the mask increases, which aggravates the amplitude of the outward expansion and inward contraction of the mask with the breathing action. After a period of time, the edge seal of the mask will fail under the reciprocating action, causing the airflow to exchange directly between the inside and outside of the mask without passing through the non-woven fabric layer, thereby losing the protection effect. The air-tight contact surface structure of the nasal back and the nasal face groove is complex, and it will fail before the zygomatic bone and the mandible, and the failure state is more serious. In actual use experience, it is manifested as condensation and frost on the forehead, hair, and front part such as bangs and hat brim, and fogging of glasses.

[0004] The current solution to this problem is to provide a one-way valve on the mask to form a valve mask. The valve opens when exhaling, and the high-humidity gas is discharged through the valve to slow down the wetting speed of the non-woven fabric filter layer of the mask. However, in this scheme, the high-humidity gas needs to enter the mask first before being discharged through the valve, and the direct contact of the high-humidity gas with the non-woven fabric filter layer and the cold air outside the mask still exists, so the effect of slowing down the wetting speed of the mask is limited. At the same time, the exhaled gas is directly discharged through the valve without filtering, which loses the protection effect of the mask on others. The one-way valve is fixedly installed on the mask and cannot be reused, which greatly increases the use cost of the mask, so it is not suitable for popularization and use. SUMMARY

[0005] Therefore, it is necessary to design an anti-condensation lining which can be separated from the mask and reused, to solve the problem of condensation sealing failure of the existing mask in low-temperature environment without losing the filtering function of exhaled gas.

[0006] The mask anti-condensation lining for low-temperature environment comprises a shell, a sealing rubber strip, a sealing rubber gasket, a gasket shaping device, and a positioner.

[0007] Wherein, the shell is composed of main shell, exhalation tube, mask connecting piece, inhalation one-way valve, the main shell is left-right symmetrical plastic shell structure, used for buckling in the mouth, the middle part is convex to cover the mouth, the upper end is concave to locate the nose; the exhalation tube is U-shaped tube, one end is fixedly connected on the side of the main shell, the other end is fixedly connected with the non-woven fabric surface of the mask through the mask connecting piece; the inhalation one-way valve is installed on the middle part of the main shell, and the valve plate opens inward.

[0008] The sealing rubber strip is installed around the two sides and the lower part of the main shell, and the sealing rubber pad is installed in the concave part of the upper end of the main shell, the sealing rubber pad is used to cover the nose, and the main shell is attached to the face through the sealing rubber strip and the sealing rubber pad to achieve air tightness.

[0009] The sealing rubber pad is provided with a rubber pad shaping device, which is used to fix the shape of the sealing rubber pad.

[0010] The positioner is used to fix the shell on the face.

[0011] In use, first, the inner lining is fixed on the face by the positioner to shield the mouth and nose, then the rubber pad shaping device is pressed to make the sealing rubber pad closely attached to the nose back, alae nasi and nasal surface groove to achieve air tightness with the face, then the mask is worn normally and the mask connecting piece is fixed with the mask. During use, when inhaling, the valve plate of the inhalation one-way valve opens inward under negative pressure, and the external air is filtered by the non-woven fabric of the mask and then enters the inner lining of the mask of the design through the inhalation one-way valve; when exhaling, the valve plate of the inhalation one-way valve is closed by positive pressure, and the high-humidity gas exhaled is filtered out through the non-woven fabric area fixed by the mask connecting piece of the exhalation tube, and the condensed water generated during the period does not diffuse like other non-woven fabric areas, and the condensed water drops after long-term use are collected by the mask connecting piece and concentrated at the bottom of the U-shaped exhalation tube. To avoid the conflict between the air tightness of the lower part of the shell and the air tightness of the lower part of the mask, the lower part of the shell should be in contact with the genal sulcus.

[0012] In the design, the flow process of the airflow in the mask is divided into half one-way flow by the inhalation one-way valve, the external air is filtered and inhaled by all non-woven fabric layers including the mask connecting piece, but only filtered and exhaled by the non-woven fabric layer within the range of the mask connecting piece, and the other part of the non-woven fabric remains dry and normal filtering resistance after the non-woven fabric in the exhalation path is wet, thereby preventing the mask from sealing failure in the reciprocating motion caused by breathing.

[0013] Preferably, the rubber pad shaping device is composed of metal wires, which are parallel multiple metal wires or mesh metal wires, and the metal wires are in sheet shape, which is a conventional design, and plastic sheet can also be used as the rubber pad shaping device, the plastic sheet has poor plasticity effect, and needs to be preheated to soften in use, but is not easy to deform after shaping, and does not need to be pressed again for plasticity when repeatedly worn as personal articles, which is convenient for repeated wearing.

[0014] Preferably, the locator is one or more of a combination of an ear hook, an ear rope, a nasal ala clip, a nasal columella clip, a nasal plug, a mouth support or a mouth magnetic attraction support. The ear hook and ear rope solutions are consistent with existing mask solutions, and any connection with the shell is within the scope of protection; the nasal ala clip, nasal columella clip, and nasal plug are solutions that use the nasal structure for positioning and fixation, and the functional structure should be arranged on the inner side of the upper part of the main shell. The clip and the tubular nasal plug are both prior art, and will not be described in detail. When used alone, the connection position of the nasal structure and the main shell does not match the positive pressure axis during exhalation, which can easily cause the main shell to tilt upward and lose air tightness, so it should be used with a locator solution that acts on the middle or lower part of the main shell; the mouth support is the most reliable connection in the solutions provided in this case, but it can affect the language communication of the wearer, so this case also provides a mouth magnetic attraction support solution. The mouth part of the magnetic attraction support is arranged between the upper lip and the upper teeth, and the corresponding main shell position is the middle part, which has less impact on the language communication of the wearer and higher reliability.

[0015] Preferably, the sealing rubber strip and the sealing rubber gasket are bonded as a whole on both sides of the shell. Considering the convergence of their functions and material selection, a single part can be used to improve the overall air tightness.

[0016] Preferably, the inhalation one-way valve is provided with a baffle or a mesh cover on the inner side of the shell, which is used to limit the opening angle of the valve plate.

[0017] Preferably, the exhalation tube has two, symmetrically installed on both sides of the main shell.

[0018] Preferably, a moisture-absorbing sponge is arranged in the exhalation tube to prevent the condensed water collected in the exhalation tube from being shaken and spilled out due to the wearer's movements. Further, the moisture-absorbing sponge can be connected to a pulling rope and extended outside the exhalation tube, and is fixed by the mask connector together with the non-woven fabric layer of the mask.

[0019] Preferably, a plurality of hydrophilic plastic-made water guide needles are arranged in the exhalation tube, the water guide needles extend upward from the exhalation tube wall, and the top end is in contact with the non-woven fabric layer of the mask. The design is to quickly drain the condensed water on the non-woven fabric layer into the exhalation tube, reducing the exhalation resistance. Further, the hydrophilic plastic is polycarbonate.

[0020] Preferably, the mask connector is a magnetic attraction compression ring, the magnetic attraction compression ring is provided with a magnet at the exhalation tube port, and the magnetic attraction compression ring is located outside the mask and clamps the non-woven fabric layer of the mask through magnetic attraction. Further, the exhalation tube port is provided with a conical horn port and a clamping table.

[0021] The application provides a mask anti-condensation inner liner for low-temperature environment, which changes the airflow in the mask into semi-one-way flow through an inhalation one-way valve, discharges the high-humidity exhaled gas from the mask through a specific non-woven filter layer, and prevents the mask from losing air tightness due to humidity when worn in cold environment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a specific embodiment principle structure diagram of the mask anti-condensation inner liner for low-temperature environment;

[0023] Figure 2 is a specific embodiment main shell principle structure diagram of the mask anti-condensation inner liner for low-temperature environment;

[0024] Figure 3 is a specific embodiment exhalation tube principle structure diagram of the mask anti-condensation inner liner for low-temperature environment.

[0025] In the figure, the shell 1, the sealing rubber strip 2, the sealing rubber gasket 3, the gasket shaping device 4, the main shell 5, the exhalation tube 6, the magnetic attraction compression ring 7, the conical horn mouth 8, the clamping table 9, the moisture absorption sponge 10, the extraction rope 11, the water guide needle 12, the inhalation one-way valve 13, the partition plate 14, and the mask non-woven cloth layer 15. DETAILED DESCRIPTION

[0026] The mask anti-condensation inner liner for low-temperature environment comprises a shell 1, a sealing rubber strip 2, a sealing rubber gasket 3, a gasket shaping device 4, and a positioner.

[0027] The shell 1 is composed of the main shell 5, the exhalation tube 6, a mask connecting piece, and the inhalation one-way valve 13. The main shell 5 is a left-right symmetrical plastic shell structure, which is used for buckling on the mouth and has a protruding part in the middle to cover the mouth and a concave part at the upper end to locate the nose. The exhalation tube 6 is a U-shaped tube, one end of which is fixedly connected to the side of the main shell 5, and the other end is fixedly connected to the mask non-woven cloth layer through the mask connecting piece. There are two exhalation tubes 6, which are symmetrically installed on the two sides of the main shell 5. The inhalation one-way valve 13 is installed on the protruding part in the middle of the main shell 5, and the valve plate thereof is opened inward. The inhalation one-way valve 13 is provided with a partition plate 14 on the inner side of the shell 1, which is used to limit the opening angle of the valve plate.

[0028] The exhalation tube 6 is provided with a moisture absorption sponge 10, which prevents the condensed water collected in the exhalation tube 6 from splashing out due to the wearer's movement. The moisture absorption sponge 10 can be easily taken out and replaced due to the structure of the exhalation tube 6. The moisture absorption sponge 10 can be connected to the extraction rope 11 and extended out of the exhalation tube 6, and is fixed together with the mask non-woven cloth layer 15 by the mask connecting piece. The exhalation tube 6 is provided with a plurality of water guide needles 12 made of hydrophilic plastic. The water guide needles 12 extend upward from the wall of the exhalation tube 6 and contact the mask non-woven cloth layer 15 at the top end. The design is to quickly drain the condensed water on the non-woven cloth layer into the exhalation tube 6, thereby reducing the exhalation resistance. The hydrophilic plastic is polycarbonate.

[0029] The mask connecting piece is a magnetic pressing ring 7, the magnetic pressing ring 7 is provided with a magnet at the mouth of the exhalation pipe 6, the magnetic pressing ring 7 is located outside the mask, and the mask non-woven fabric layer 15 is clamped by the magnetic attraction force and the mouth of the exhalation pipe 6. The exhalation pipe 6 is provided with a conical horn mouth 8 and a clamping table 9.

[0030] The sealing rubber strip 2 is installed around the two sides and the lower part of the main shell 5, the sealing rubber pad 3 is installed in the inner recess of the upper end of the main shell 5, the sealing rubber pad 3 is used to cover the nose, and the main shell 5 is attached to the face by the sealing rubber strip 2 and the sealing rubber pad 3 and realizes air tightness. The sealing rubber strip 2 and the sealing rubber pad 3 are bonded as a whole on both sides of the shell 1, and considering that the functions and material selection tend to be the same, a single part can be used for connection and fixation to improve the overall air tightness.

[0031] The sealing rubber pad 3 is provided with a rubber pad shaping device 4, which is used to fix the shape of the sealing rubber pad 3. The rubber pad shaping device 4 is composed of metal wires, which are parallel or in a mesh shape. The metal wires are in a sheet shape, which is a conventional design. Plastic sheets can also be used as the rubber pad shaping device 4. The plastic sheets have poor plasticity and need to be preheated to soften them during use. However, they are not easy to deform after shaping, and they do not need to be repressed for plasticity when repeatedly worn as personal items, which is convenient for repeated use.

[0032] The positioner is used to fix the shell 1 on the face of a person. The positioner is a combination of one or more of an ear hook, an ear rope, a nasal ala clamp, a nasal columella clamp, a nasal plug tube, a mouth support or a mouth magnetic attraction support. The ear hook and ear rope scheme is consistent with the existing mask scheme, and its connection with any position of the shell 1 is within the protection scope of the case; the nasal ala clamp, the nasal columella clamp and the nasal plug tube are schemes for positioning and fixing by using the nasal structure, and their functional structures should be arranged on the upper inner side of the main shell 5. The clamp and the tubular nasal plug are both prior art, which will not be described in detail. When used alone, the connection position of the nasal structure and the main shell 5 does not match the positive pressure axis during exhalation, which easily leads to the upward tilting of the main shell 5 and air tightness failure. Therefore, it should be used together with the positioner scheme acting on the middle or lower part of the main shell 5; the mouth support is the most reliable connection in the schemes provided in the case, but it will affect the language communication of the wearer. Therefore, the case also provides a scheme of a mouth magnetic attraction support. The mouth part of the magnetic attraction support is arranged between the upper lip and the upper teeth, and the corresponding position of the main shell 5 is the middle part, which has less effect on the language communication of the wearer and has high reliability.

[0033] In use, first fix the inner liner to the face through the positioner to cover the mouth and nose, then press the rubber pad shaping device 4 to make the sealing rubber pad 3 closely adhere to the nose back, wings and face groove to achieve air tightness with the face, then wear the mask normally and fix the mask connector with the mask. In use, when inhaling, the valve plate of the inhalation check valve 13 opens inward by negative pressure, the external air is filtered by the non-woven fabric of the mask, then enters the inner liner of the mask through the inhalation check valve 13; when exhaling, the valve plate of the inhalation check valve 13 is closed by positive pressure, the high humidity gas is filtered by the non-woven fabric area fixed by the mask connector through the exhalation tube 6, the condensate produced during the process does not spread like other non-woven fabric areas, and the condensate drops after long-term use are collected by the mask connector and concentrated at the U-shaped bottom of the exhalation tube 6. To avoid the conflict between the air tightness of the lower part of the shell 1 and the air tightness of the lower part of the mask, the lower part of the shell 1 should be in contact with the sealing of the genal labial sulcus.

[0034] In this design, the flow process of the airflow in the mask is divided into semi-one-way flow by the inhalation check valve 13, the external air is filtered and inhaled by all non-woven fabric layers including the mask connector, but only filtered and exhaled by the non-woven fabric layer within the range of the mask connector, and the other parts of the non-woven fabric remain dry and normal filtering resistance after the non-woven fabric in the exhalation path is wet, thereby preventing the mask from sealing failure in the reciprocating motion caused by breathing.

Claims

1. A condensation-proof inner liner for face masks used in low-temperature environments, characterized in that, Includes housing, sealing strip, sealing gasket, gasket shaping device, and positioner; The shell consists of a main shell, an exhalation tube, a mask connector, and an inhalation one-way valve. The main shell is a symmetrical plastic shell structure used to fasten to the mouth, with its central part bulging outward to cover the mouth and its upper end recessed inward to cover the nose. The exhalation tube is a U-shaped tube, with one end fixedly connected to the side of the main shell and the other end connected and fixed to the non-woven fabric of the mask through the mask connector. The inhalation one-way valve is installed on the bulging part in the middle of the main shell, with its valve plate opening inward, allowing external air to be inhaled through the entire non-woven fabric of the mask, including the area within the mask connector, but only exhaled through the non-woven fabric of the mask within the area within the mask connector. The sealing strips are installed around the sides and bottom of the main shell, and the sealing gaskets are installed in the recessed part of the upper end of the main shell. The sealing gaskets are used to cover the nose. The main shell is attached to the face through the sealing strips and sealing gaskets to achieve airtightness. A gasket shaping device is provided on the sealing gasket, which is used to fix the shape of the sealing gasket. The locator is used to secure the shell to a person's face.

2. The anti-condensation liner for face masks in low-temperature environments as described in claim 1, characterized in that, The adhesive pad shaping device is made of metal wires, and its structure consists of multiple parallel metal wires or a mesh of metal wires, with the metal wires being sheet-like.

3. The anti-condensation liner for face masks in low-temperature environments as described in claim 2, characterized in that, The locator is one or more of the following: ear hook, ear cord, nose clip, columella clip, nasal plug tube, and mouth support.

4. The anti-condensation liner for face masks in low-temperature environments as described in claim 1, characterized in that, The sealing strip and sealing gasket are bonded together on both sides of the housing.

5. The anti-condensation liner for face masks in low-temperature environments as described in claim 1, characterized in that, The intake check valve has a baffle or mesh cover inside the housing, which is used to limit the opening angle of the valve plate.

6. The anti-condensation liner for face masks in low-temperature environments as described in claim 1, characterized in that, There are two exhalation tubes, which are symmetrically installed on both sides of the main shell.

7. The anti-condensation liner for face masks in low-temperature environments as described in claim 1, characterized in that, The exhalation tube is equipped with a moisture-absorbing sponge.

8. The anti-condensation liner for face masks in low-temperature environments as described in claim 7, characterized in that, The exhalation tube is equipped with multiple water-guiding needles made of hydrophilic plastic, which extend upward from the wall of the exhalation tube and contact the non-woven fabric of the mask at their tips.

9. The anti-condensation liner for face masks in low-temperature environments as described in claim 1, characterized in that, The mask connector is a magnetic pressure ring. Magnets are provided on the magnetic pressure ring and the exhalation tube opening. The magnetic pressure ring is located on the outside of the mask and clamps the non-woven fabric of the mask with the exhalation tube opening through magnetic attraction.

10. The anti-condensation liner for face masks in low-temperature environments as described in claim 1, characterized in that, The exhalation tube is equipped with a conical flare and a clamping platform.

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