CN215876019U

CN215876019U - Filtering type breathing protective cover and electric air purification respirator comprising same

Info

Publication number: CN215876019U
Application number: CN202122045075.XU
Authority: CN
Inventors: 杨东宁
Original assignee: Shenzhen Three Science And Technology Co ltd
Current assignee: Shenzhen Three Science And Technology Co ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-02-22
Anticipated expiration: 2031-08-27

Abstract

The utility model relates in particular to a low-cost filtering type breathing protective cover and a power-driven air purifying respirator comprising the same. The respirator hood comprises a transparent sheet and a seal. The respirator hood includes a filter structure that filters the exhaled breath of a wearer. The respiratory protection mask is provided with a respiratory protection mask and a respiratory protection hood. The breathing protective cover not only can be made into a disposable breathing protective cover, but also can be made into a breathing protective cover which can be repeatedly used by replacing a filter sheet. The breathing protective cover is low in cost, compact, light and comfortable to wear. The electric air purifying respirator comprises the breathing protective cover and the air purifier, so that the electric air purifying respirator not only has high protection factors and protects a wearer, but also can filter the exhaled air of the wearer and protect surrounding people.

Description

Filtering type breathing protective cover and electric air purification respirator comprising same

Technical Field

The utility model relates in particular to a respirator hood for a powered air purifying respirator and a powered air purifying respirator comprising the same.

Background

Powered Air Purifying Respirators (PAPRs) are high performance protective products. The PAPR consists of an electric air cleaner and a breathing protective mask (a mask, a half mask, a full mask, a hood, an isolation suit, etc.). PAPR pressurizes after filtering air, and carry for breathing protective cover to keep breathing protective cover inside to have certain positive pressure value for the outside, thereby prevent that external contaminated air from getting into breathing protective cover in, have very low leakage rate (be less than 0.1% usually).

In epidemic prevention, the PAPR does not generally filter the exhaled air of the wearer, although the PAPR may provide good protection to the wearer; when the wearer is an infected person, the surrounding people are at risk of infection. Conventional PAPRs are bulky, heavy, inconvenient to carry and wear, and expensive. In everyday epidemic prevention, there is a need for a high protection factor protective product that is more portable and economical, while filtering the exhaled air of the wearer.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to overcome the above-described deficiencies of the prior art and to provide a low cost filtering respirator hood for a PAPR and powered air purifying respirator incorporating the same.

The breathing protective cover can filter the exhaled air of the wearer.

The breathing protective cover has the advantages of low cost, light weight and comfortable wearing.

The electric air purifying respirator comprises the breathing protective cover and an air purifier.

In one aspect of the utility model, a low cost respiratory protection mask for a PAPR is provided, the respiratory protection mask comprising a transparent sheet and a seal; the transparent sheet is flexible and impermeable; the seal is flexible; an edge of the transparent sheet and an edge of the sealing member are joined together; the seal comprises a resilient structure; the elastic structure is positioned at the edge of the sealing element and can be jointed with the head or the neck; the respiratory protection mask comprises a filtering structure and an air inlet; the filter structure may filter exhaled air of the wearer.

In one embodiment of the utility model, the filter structure comprises a meltblown nonwoven.

In one embodiment of the utility model, the seal comprises a filter structure.

In one embodiment of the present invention, the transparent sheet is provided with air holes, and the filtering structure is covered on the air holes.

In one embodiment of the present invention, the sealing member is made of a fabric obtained by combining one or more of a fiber fabric and a polymer film.

In one embodiment of the present invention, the fiber fabric is one of a polypropylene spun-bonded nonwoven fabric, a polyester fiber fabric, a polyurethane fiber fabric, and a polyamide fiber fabric.

In one embodiment of the present invention, the high polymer film is one of a Polyethylene (PE) film, a polypropylene (PP) film, a Thermoplastic Polyurethane (TPU) film, a polyvinyl chloride (PVC) film, and an ethylene-vinyl acetate copolymer (EVA) film.

In one embodiment of the present invention, the fabric is one of polypropylene spunbond/PE film composite nonwoven fabric, polypropylene spunbond/meltblown/spunbond composite nonwoven fabric (SMS), polypropylene spunbond/meltblown/spunbond composite nonwoven fabric (SMMS), pongee coated TPU film composite material, and pongee coated PE film composite material.

In one embodiment of the utility model, the respiratory protection mask includes an elastic pad; the elastic pad is arranged at the position of the inner side of the breathing protective cover corresponding to the forehead of a wearer.

In one embodiment of the utility model, the respiratory protection mask is a respiratory protection mask.

In one embodiment of the present invention, the respiratory protection mask includes an elastic band that is attached to the transparent sheet to secure the respiratory protection mask to the head.

In one embodiment of the utility model, the respiratory mask is a respiratory mask hood; the elastic structure can be jointed with the neck.

In one embodiment of the utility model, the elastic structure is adjustable in length.

In one embodiment of the utility model, the elastic structure comprises an elastic cord and a sleeve.

In one embodiment of the utility model, the sleeve is formed by folding the edge of the seal.

In one embodiment of the utility model, the elastic pad is one or a combination of sponge and foam.

In one embodiment of the present invention, the edge of the transparent sheet and the edge of the sealing member are bonded together by one or a combination of gluing, sewing, thermal welding and ultrasonic welding.

In one embodiment of the present invention, the transparent sheet is one of polyethylene terephthalate (PET), polyvinyl chloride (PVC), and Polycarbonate (PC), preferably PET.

In one embodiment of the present invention, the thickness of the transparent sheet is between 0.1 and 2mm, preferably between 0.2 and 1 mm.

In one embodiment of the present invention, the air inlet is provided on the transparent sheet or the sealing member.

The breathing protective cover not only can be used as the breathing protective cover of the electric air purifying respirator, but also can be used as the breathing protective cover of other types, such as an oxygen-inhaling breathing protective cover and a steel cylinder type positive pressure respirator.

In another aspect of the utility model, a low cost powered air purifying respirator is provided that filters exhaled air from a wearer, the powered air purifying respirator comprising an air purifier and a respiratory protection hood of the present invention.

In one embodiment of the present invention, the air cleaner is provided with an air outlet; and the air outlet of the air purifier is connected with the air inlet of the breathing protective cover.

In one embodiment of the utility model, the air outlet of the air purifier is connected with the air inlet of the respiratory protection mask through an air duct.

In one embodiment of the utility model, the air cleaner includes an electric blower and a filter.

In one embodiment of the present invention, an air volume of the air outlet of the air cleaner is greater than 50L/min.

Compared with the prior art, the utility model has the obvious advantages and beneficial effects that:

1) the respirator hood includes a filter structure that filters the exhaled breath of the wearer.

2) The respirator hoods are simple, lightweight, and cost and weight much less than masks or hoods used in conventional PAPRs.

3) The breathing protective cover not only can be made into a disposable breathing protective cover, but also can be made into a breathing protective cover which can be repeatedly used by replacing the filter, thereby meeting the requirements of different occasions.

4) The respiratory protection cover and the air purifier adopt a separation mode; the air purifier can be used repeatedly, and the separated design is convenient for disinfection and cleaning and reduces the use cost.

5) The leakage rate of the electric air purifying respirator is lower than 0.5 percent, and the filtering efficiency of the exhaled air is higher than 97 percent.

6) The electric air purifying respirator can also be used with other high-performance masks; the leak rate and the filtering efficiency of the exhaled air are further improved.

To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It is noted that the drawings may not be to scale for clarity of illustration and that this does not detract from the understanding of the utility model. The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

Drawings

FIG. 1 is a side view of a first embodiment of a respiratory protection mask;

FIG. 2 is a view showing the construction of the transparent sheet and the sealing member of the first embodiment;

fig. 3 is a joining view of the transparent sheet and the sealing member of the first embodiment;

FIG. 4 is a side view of a second embodiment of a respiratory protection mask;

FIG. 5 is a front view of a third embodiment of a respiratory protection mask;

FIG. 6 is a schematic view of a powered air purifying respirator of a fourth embodiment;

fig. 7 is a schematic view of a powered air purifying respirator of a fifth embodiment.

The attached drawings are as follows:

1. electric air purifying respirator 2, breathing protective cover 3 and air purifier

4. Electric blower 5, filter 6, air duct

21. Sealing member 22, transparent sheet 23, and air inlet

24. Elastic pad 25, elastic band 26 and filter sheet

211. First fabric 212, second fabric 213 and third fabric

214. Fourth fabric 215, elastic rope 216 and adjusting buckle

217. Pleat 218, elastic structure

2111. A first sleeve 2121, a second sleeve 2131 and a third sleeve

2141. A fourth sleeve 221, a joint 222, and a vent

231. Hollow tube 251, fixing buckle 41 and air outlet

Detailed Description

Term(s) for

The terms "upper", "lower", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As used herein, the term "medial" refers to the side that faces the wearer's head when worn.

As used herein, the term "upper end" refers to the end that, when worn, is near the top of the wearer's head.

As used herein, the term "lower end" refers to the end opposite the upper end when worn.

As used herein, the term "facing" includes fibrous fabrics, films, and composites of the two.

The present invention is further explained below with reference to specific examples, which are not intended to limit the present invention in any way.

A first embodiment of the utility model provides a respiratory protection mask. Fig. 1 to 3 show a specific structure of the first embodiment.

As shown in fig. 1, the respiratory protection mask 2 is a respiratory protection mask comprising a seal 21 and a transparent sheet 22. The edges of the transparent sheet 22 and the seal 21 are joined together, the transparent sheet 22 and the seal 21 forming an enclosed area around the wearer's face. In this embodiment, the transparent sheet 22 is a transparent and flexible PET sheet with a thickness of 0.3mm, the sealing member 21 is made of SMS composite material, the inner and outer layers of spun-bonded nonwoven fabrics, and the middle layer of melt-blown nonwoven fabric has a filtration efficiency of more than 99% for 0.3 μm particles.

Fig. 2 is a structure diagram of the transparent sheet and the sealing member of the first embodiment. When laid flat, the transparent sheet 22 is flat and bent into an arc when worn. The sealing member 21 is formed of four flat-type panels, a first panel 211 corresponding to a lower jaw position, a second panel 212 corresponding to a top of the head, and a third panel 213 and a fourth panel 214 symmetrical to each other and corresponding to both sides of the head. The upper edge of the first facestock 211 is folded to form a first sleeve 2111, the dashed line in fig. 2 being an ultrasonic weld line. The upper edge of the second panel 212 is folded to form a second sleeve 2121; the left edge of the third fabric 213 is folded to form a third sleeve 2131; the right edge of the fourth fabric 214 is folded to form a fourth sleeve 2141.

The BB 'side of the first fabric 211, the DD' side of the second fabric 212, the EF side of the third fabric 213, and the E 'F' side of the fourth fabric 214 are respectively joined to the corresponding edges of the transparent sheet 22 by heat fusion, thereby forming an annular joining portion 221 as indicated by oblique lines in fig. 3. The GF edge of the third fabric 213, the AB edge of the first fabric 211, the HE edge of the third fabric 213, the CD edge of the second fabric 212, the G 'F' edge of the fourth fabric 214, the A 'B' edge of the first fabric 211, the H 'E' edge of the fourth fabric 214 and the C 'D' edge of the second fabric 212 are ultrasonically welded together. Then the elastic rope 215 is sequentially threaded into the first sleeve 2111, the third sleeve 2131, the second sleeve 2121 and the fourth sleeve 2141; the ends of the elastic cord 215 are passed through the adjustment buckle 216, the elastic cord 215 is tightened, and the edge of the sealing member 21 is folded as shown in fig. 1 to form an elastic structure 218, which can be attached to the head to seal the breathing protective mask.

The elastic pad 24 is attached to the upper end of the transparent sheet 22, and the elastic pad 24 of the present embodiment is a 30mm thick foam-rubber pad, which serves as a support and prevents the middle portion of the inner side of the transparent sheet 22 from being attached to the face when worn. The protective mask 2 is prevented from slipping off the head when worn by fixing both ends of the elastic band 25 to both sides of the upper end of the transparent sheet 22 by the fixing buttons 251.

Fig. 4 is a side schematic view of a second embodiment, in this case a respirator hood 2. By varying the shape and size of the seal 21, a hood-type respiratory protection mask 2 is produced. The transparent sheet 22 and seal 21 form an enclosed area around the wearer's head. The material used for the seal 21 is the same as in the first embodiment.

Fig. 5 is a schematic front view of the third embodiment. The third embodiment has a similar overall structure to the first embodiment and is a mask type. The fabric used by the sealing element 21 is made of composite material of a TPU film stuck on a Chunyan fabric, and is flexible and airtight. The filtering structure is arranged on the transparent sheet 22, six rectangular air vents 222 are arranged at the corresponding positions of the mouth and the nose of the transparent sheet 22, and the inner sides of the air vents 222 are covered with square filter sheets 26 (shown by dotted line rectangles in fig. 5). An air inlet 23 is provided at the lower end of the respirator hood 2. The filter sheet 26 is replaceable by attaching it to the transparent sheet 22 by double-sided adhesive around the peripheral edges. The whole breathing protective cover 2 is sterilized after use, and can be repeatedly used after the filter 26 is replaced.

Fig. 6 shows a powered air purifying respirator of a fourth embodiment, which comprises a respiratory protection mask 2, an air purifier 3 and an airway tube 6. The respirator mask 2 is connected to the outlet 41 of the air cleaner 3 and the inlet 23 of the respirator mask 2 via the air duct 6, as in the first embodiment. The gas-guide tube 6 is a bellows tube. The air cleaner 3 includes an electric blower 4 and a filter 5. The filter 5 has a filtration efficiency of over 99.97% for 0.3 micron particles. The outside air enters the filter 5, after being purified, the outside air is pressurized and conveyed into the breathing protective cover 2 through the air duct 6 by the electric blower 4 to generate certain positive pressure, and the outside polluted air can be prevented from entering the breathing protective cover 2. The gases exhaled by the wearer are also expelled through the filter structure of the respirator hood 2 with the positive pressure air within the respirator hood 2. The air cleaner 3 is light in weight and can be worn on the arm or hung in front of the chest.

The air purifier 3 and the breathing protective cover 2 adopt a separated design, so that the breathing protective cover 2 is convenient to replace, the breathing protective cover 2 can be used as a disposable product, and components in the air purifier 3 except the filter 5 can be sterilized or cleaned for repeated use, so that the use cost is reduced by the separated design.

Fig. 7 shows a fifth embodiment of a powered air purifying respirator, which comprises a respiratory protection mask 2, an air purifier 3 and an air duct 6. The breathing protective mask 2 is similar to the first embodiment. The air inlet 23 is provided at the top of the front end of the respirator hood 2 and the inlet air is guided by a hollow tube 231 into the lower end of the elastic pad 24 (shown by the dashed rectangle in fig. 7). The air purifier 3 is hung on the elastic band 25 and is arranged behind the head; the air duct 6 is connected with the air outlet 41 of the air purifier 3 and the air inlet 23 of the breathing protective cover 2. The filtering efficiency of the air purifier 3 to 0.3 micron particles exceeds 99.97 percent.

The following experiments were designed to test the leak rate and filtration efficiency of exhaled air for powered air purifying respirators.

Experiment 1: the PAPR of the fourth embodiment was worn by an experimenter, and the external environment was a normal atmospheric environment, and the leakage rate of the PAPR was tested. The PAPR of the fourth embodiment is worn on the manikin, the human breath is simulated from the manikin, 0.3 μm NaCl particles of a certain concentration are discharged, the external environment is a clean air environment, and the filtering efficiency of the PAPR on the breath is tested.

Experiment 2: the test of experiment 1 was repeated using the same air cleaner, with the breathing mask of the second embodiment replacing the breathing mask of experiment 1.

Experiment 3: the test of experiment 1 was repeated using the same air cleaner with the breathing mask of the third embodiment in place of the breathing mask of experiment 1.

Experiment 4: the test of experiment 1 was repeated with the PAPR of the fifth embodiment instead of the PAPR of the fourth embodiment.

TABLE 1PAPR leakage Rate and filtration efficiency on expired air

Experiment of	1	2	3	4
					Leak rate	0.05％	0.02％	0.06％	0.07％
Efficiency of filtration of exhaled breath	99.1％	99.3％	98.6％	97.5％

The above experiments show that the PAPR in each embodiment of the present invention has a leakage rate of less than 0.1% and a filtration efficiency for exhaled air of greater than 97%.

The electric air purifying respirator is used for epidemic prevention, has good protection effect, low cost and convenient and comfortable wearing.

The breathing protective cover provided by the utility model can be connected with different air purifiers for use. The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims

1. A respirator mask for a powered air purifying respirator, comprising: the respiratory protection mask comprises a transparent sheet and a sealing piece; the transparent sheet is flexible and impermeable; the seal is flexible; an edge of the transparent sheet and an edge of the sealing member are joined together; the seal comprises a resilient structure; the elastic structure is positioned at the edge of the sealing element and can be jointed with the head or the neck; the respiratory protection mask comprises a filtering structure and an air inlet; the filter structure comprises a melt-blown non-woven fabric and can filter the exhaled air of a wearer.

2. The respirator hood of claim 1, wherein the seal is comprised of a fabric that is a composite of one or more of a fabric and a polymeric film.

3. The respiratory mask of claim 1, wherein the seal comprises a filtering structure.

4. The respirator hood according to claim 3, wherein the seal is comprised of one or both of a polypropylene spunbond/meltblown/spunbond composite nonwoven, a polypropylene spunbond/meltblown/spunbond composite nonwoven.

5. The respirator hood according to claim 1, wherein the transparent sheet is provided with air vents and covers the filter structure over the air vents.

6. The respiratory protection mask of claim 1, wherein the respiratory protection mask comprises an elastic pad; the elastic pad is arranged at the position of the inner side of the breathing protective cover corresponding to the forehead of a wearer.

7. The respiratory protection mask of claim 1, wherein the respiratory protection mask is a respiratory protection mask; the respiratory protection mask comprises elastic bands; the elastic band is connected with the transparent sheet, so that the breathing protective mask can be fixed on the head.

8. The respiratory protection mask of claim 1, wherein the respiratory protection mask is a respiratory protection hood; the elastic structure can be jointed with the neck.

9. A powered air purifying respirator, comprising an air purifier and a respiratory protection mask according to any one of claims 1 to 8; the air purifier is provided with an air outlet; and the air outlet of the air purifier is connected with the air inlet of the breathing protective cover.

10. The powered air purifying respirator of claim 9, wherein the air purifier is coupled to the respirator hood via a gas conduit.