WO2021208693A1 - 一种文丘里负压口罩 - Google Patents

一种文丘里负压口罩 Download PDF

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Publication number
WO2021208693A1
WO2021208693A1 PCT/CN2021/082881 CN2021082881W WO2021208693A1 WO 2021208693 A1 WO2021208693 A1 WO 2021208693A1 CN 2021082881 W CN2021082881 W CN 2021082881W WO 2021208693 A1 WO2021208693 A1 WO 2021208693A1
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Prior art keywords
tube
mouth
nasal tube
negative pressure
exhaust valve
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PCT/CN2021/082881
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English (en)
French (fr)
Inventor
华子瑞
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广东金发科技有限公司
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Priority claimed from CN202010282808.9A external-priority patent/CN111480906A/zh
Priority claimed from CN202020526329.2U external-priority patent/CN212393933U/zh
Application filed by 广东金发科技有限公司 filed Critical 广东金发科技有限公司
Publication of WO2021208693A1 publication Critical patent/WO2021208693A1/zh

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    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • A41D27/24—Hems; Seams
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear

Definitions

  • the invention relates to the technical field of masks, in particular to a venturi negative pressure mask.
  • a cloth-like mask only has a small area in the front of the nose and mouth for ventilation, and most of the remaining area is tightly attached to the face and cannot be used for ventilation.
  • Mask cannot be cleaned means that the filter fabric of the mask cannot be cleaned, and some masks with valves are also lost after one use, which is very wasteful.
  • the present invention provides a Venturi negative pressure mask, which solves the above-mentioned global problems in the background art.
  • Venturi effect means that negative pressure will be generated near the fluid flowing at high speed, which will produce adsorption.
  • a venturi negative pressure mask comprising a filter cloth, a right nasal tube with a right nasal tube opening, a left nasal tube with a left nasal tube opening, a mouth front tube with a mouth front tube opening, and one-way Exhaust valve, nose plug and mask belt, set a one-way exhaust valve in the middle of the filter cloth, set up a mouth front tube inside the one-way exhaust valve, the mouth front tube is designed to have a certain gap from the wearer’s lips Venturi tube, left and right nasal tubes are set on the front of the mouth tube.
  • the vents at one end of the left and right nasal tubes are opposite to the movable part of the one-way exhaust valve and have a certain gap from the valve.
  • the other end is controlled by the nose plug to make the left and right nasal tube openings and the wearer’s nostrils have a certain gap.
  • the strong airflow from the left and right nostrils will first Negative pressure is generated around the left and right nasal canal openings.
  • the surrounding air will be sucked into the left and right nasal canals along with the strong airflow, and then the strong airflow in the left and right nasal canal faces one-way
  • negative pressure will be generated in the front pipe of the mouth near the inner side of the one-way exhaust valve, and the surrounding air will be discharged from the one-way exhaust valve along with the strong air flow; when the wearer exhales from the lips When breathing, the strong air flow from the lips will generate negative pressure around the mouth of the mouth.
  • the surrounding air will be sucked into the mouth of the mouth along with the strong air flow and then discharged through the one-way exhaust valve to filter the cloth cavity.
  • the interior is always under negative pressure, which solves the problems of the small volume of the cavity in front of the mouth that the air is not smooth, the volume of the cavity in front of the mouth is large, and the exhaust gas replacement rate is not high.
  • the exhaust gas is completely replaced and the inhalation is particularly easy. The ideal wearing effect.
  • the shape of the nozzle of the front nozzle is a circle, an oval, a lip, or a square.
  • the left nasal tube and the right nasal tube are integrally formed, or the left nasal tube and the right nasal tube are designed as the same branch tube opposite to the position of the wearer's left and right nostrils.
  • the left nasal tube, the right nasal tube and the front mouth tube are an integral assembly or an integrally formed component.
  • the one-way exhaust valve is connected with the nozzle front pipe, and is partially exposed on the outside of the filter cloth.
  • the venturi negative pressure mask of the present invention Compared with a piece of cloth mask or a mask with a cavity currently in the market, the venturi negative pressure mask of the present invention has the following advantages:
  • the material of the filter cloth determines the functional properties of the mask, and the actual filter area of the filter cloth determines the amount of ventilation per unit time. The greater the ventilation, the easier the breathing.
  • a cloth-like mask such as the current medical masks
  • most of the filter cloths are close to the face and cannot provide good ventilation at all. To be precise, the filter cloth is wasted.
  • This kind of mask is relatively slow when inhaling air and slow when exhaling. It also generates positive pressure in front of the mouth and leaks air around the edge of the mask.
  • the venturi negative pressure mask of the present invention must be provided with a front mouth tube, a left nasal tube, and a right nasal tube in front of the mouth and nostrils.
  • the middle part of the filter cloth is forcibly propped up and the actual ventilation area of the filter cloth is greatly increased. , In this way, it is especially easy to breathe in.
  • the exhaust gas must be exhausted to ensure sufficient oxygen supply.
  • the cavity in front of the mouth is always under positive pressure. Then, after each exhalation, the cavity in front of the mouth is always filled with exhaust gas.
  • the ventilation area of the filter cloth in front of the mouth is small, and the ventilation volume is reduced.
  • the volume of the cavity in front of the mouth must be increased. However, the volume of the cavity increases, and there is more exhaust gas that is repeatedly circulated. This is a problem that has not yet been solved for the current mask industry businesses.
  • the venturi negative pressure mask of the present invention has a front mouth tube inside the one-way exhaust valve, and the front mouth tube has a certain gap from the lips.
  • the vent of one end of the nasal tube is opposite to the movable part of the one-way exhaust valve and there is a certain gap away from the valve. There is a certain gap between the nostrils.
  • the Venturi principle when the wearer exhales from the nostril, the strong airflow from the left and right nostrils will first cause negative pressure around the left and right nasal canal openings.
  • the surrounding air will be sucked into the left nasal tube and right nasal tube along with the strong air flow, and then when the strong air flow in the left nasal tube and right nasal tube rushes out against the valve plate of the one-way exhaust valve, the front tube of the mouth is close to the one-way exhaust Negative pressure will be generated around the inside of the valve, and the surrounding air will be discharged from the one-way exhaust valve along with the strong airflow; when the wearer exhales from the lips, the strong airflow from the lips will generate around the mouth of the mouth Negative pressure, the surrounding air will be sucked into the front tube of the nozzle along with the strong air flow and then discharged through the one-way exhaust valve, so that the filter cloth cavity is always under negative pressure. Therefore, when people exhale exhaust gas, exhaust gas will never be emitted in the cavity in front of the mouth, which ensures sufficient oxygen supply during inhalation.
  • the venturi negative pressure mask of the present invention is provided with a front mouth tube in front of the mouth, and a left nasal tube and a right nasal tube are provided in front of the nose.
  • the nose and mouth work flexibly, and it is easy and free to wear. Observe carefully, when people breathe: sometimes only the mouth, sometimes only the nose, and sometimes both mouth and nose; sometimes the left and right nostrils are unblocked, sometimes one is unblocked and the other is not unblocked. People use their noses to breathe more when they are leisure, and use their mouths to breathe more when they are vigorous, or to breathe together with their mouth and nose. How to prevent people from leaving exhaust gas and not generating positive pressure in the mask under any circumstances is currently impossible. A cloth-like mask wraps the lips, making it difficult to get in and out of air smoothly, and it is inconvenient to speak.
  • the venturi negative pressure mask of the present invention is equipped with a front mouth tube in front of the mouth, a left nasal tube and a right nasal tube are arranged in front of the nose, and they are all separated from the mouth and the nose has a certain gap.
  • the exhaust gas will not be emitted in the cavity in front of the mouth.
  • the air in the cavity in front of the mouth will be filtered and enter through the gap in front of the mouth and nose, so it is very easy to exhale and inhale air. Because there is a certain gap in front of the mouth and nose, it is very convenient to talk.
  • the greater advantage is that no matter what the working state of the nose and mouth is, the exhaust gas does not remain, and the inhalation is very easy.
  • the one-way exhaust valve can flexibly adjust the position of the structure on the filter cloth according to the human face, and only need to replace the filter cloth when replacing it. In this way, it saves costs, is convenient to adjust, and is scientific and environmentally friendly.
  • Fig. 1 is a schematic diagram of the implementation structure of the venturi negative pressure mask of the present invention acting on the stereotyped mask.
  • Figure 1 shows a schematic diagram of the structure of the venturi negative pressure mask of the present invention.
  • Venturi negative pressure mask including filter cloth 1, right nasal tube 3 with right nasal tube opening 2, left nasal tube 5 with left nasal tube opening 4, and front mouth tube
  • Nozzle front pipe 7 one-way exhaust valve 8, nose plug 9 and mask band 10 of port 6
  • a one-way exhaust valve 8 is installed in the middle of the filter cloth 1, and a nozzle is set inside the one-way exhaust valve 8.
  • the front tube 7, the front mouth tube 7 is designed as a venturi tube with a certain gap between the lips of the wearer, the left nose tube 5 and the right nose tube 3 are set on the front mouth tube 7, and the left nose tube 5 and the right nose tube 3
  • One end of the vent is opposite to the movable part of the one-way exhaust valve 8 and has a certain gap from the valve plate, and the other end is controlled by the nose tip plug 9 to make the left nasal tube port 4 and the right nasal tube port 2 and the wearing There is a certain gap between the nostril of the wearer. When the wearer exhales from the nostril, the strong airflow from the left and right nostril will firstly cause negative pressure around the left nasal tube opening 4 and right nasal tube opening 2.
  • the surrounding air will be discharged from the one-way exhaust valve 8 along with the strong airflow; when the wearer exhales from the lips, the strong airflow from the lips will Negative pressure is generated around the mouth 6 of the front tube of the mouth, and the surrounding air will be sucked into the front tube 7 of the mouth along with the strong air flow and then discharged through the one-way exhaust valve 8, so that the filter cloth 1 cavity is always negative
  • the pressure condition solves the problems of the small volume of the cavity in front of the mouth that the filtered air is not smooth, the volume of the cavity in front of the mouth is large and the exhaust gas replacement rate is not high, and the ideal wearing effect of complete exhaust gas replacement and particularly easy inhalation is realized.
  • the shape of the mouth 6 of the mouth tube is round, oval, lip or square.
  • the left nasal tube 5 and the right nasal tube 3 may be integrally formed, or they are designed as the same branch tube opposite to the left and right nostrils of the wearer.
  • the left nasal tube 5, the right nasal tube 3, and the front mouth tube 7 are an integral assembly or an integrally formed component.
  • the front mouth tube 7 is combined with the left nose tube 5 and the right nose tube 3 to form a component, and this component and the one-way exhaust valve 8 are fixed on the filter cloth 1 in a displaceable and flexible fixing manner for Adjust the tightness of the mouth and nose and nose plug 9 of people with different face shapes.
  • the one-way exhaust valve 8 is connected to the nozzle front tube 7 and is partially exposed on the outside of the filter cloth 1.
  • the position where the one-way exhaust valve 8 is installed on the nozzle front pipe 7 is specifically determined according to the distance between the filter cloth 1 and the lips.
  • the one-way exhaust valve 8, the front mouth tube 7, the left nose tube 5 and the right nose tube 3 installed on the filter cloth 1 can be produced in a single assembly for adapting to the corresponding type of mask filter cloth.
  • the structure of the mask band 10 can be selected in a variety of ways, and one of the preferred solutions is to use an elastic elastic band.
  • the mouth front tube 7 has a certain gap from the lips; the left nasal tube 5 and the right nasal tube 3 have one end vents opposite to and away from the movable part of the one-way exhaust valve 8
  • the valve plate has a certain gap; the other ends of the left nasal tube 5 and the right nasal tube 3 are controlled by the nasal tip plug 9 so that there is a certain gap between the left nasal tube opening 4, the right nasal tube opening 2 and the wearer's nostrils. How much higher the nose tip plugging piece 9 is, the airflow rushed out from the nostril is not radiated in the filter cloth 1 as much as possible, which is a standard design.
  • the shape of the pre-mouth tube orifice 6, the left nasal tube orifice 4, and the right nasal tube orifice 2 may be round, square, oval, or the like. If the front mouth tube 7 is combined with the left nose tube 5 and the right nose tube 3 to form a component, this component and the one-way exhaust valve 8 are fixed on the filter cloth 1 in a displaceable and flexible manner, then the next replacement Only need to replace the filter cloth 1.
  • venturi negative pressure mask created by the present invention can also have many transformations and modifications, which are not limited to the specific structure of the above-mentioned embodiment, such as the shape and size of the front mouth tube, the left nasal tube, and the right nasal tube. Various changes in the installation location, etc. In short, the protection scope of the venturi negative pressure mask created by the present invention should also include those exchanges, substitutions and modifications that are obvious to those of ordinary skill in the art.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Abstract

一种文丘里负压口罩，包括过滤布（1）、右鼻管管口（2）、右鼻管（3）、左鼻管管口（4）、左鼻管（5）、嘴前管管口（6）、嘴前管（7）、单向排气阀（8）、鼻尖堵片（9）、口罩带（10），在过滤布（1）的中部设置单向排气阀（8），在单向排气阀（8）的内侧设置嘴前管（7），嘴前管（7）设计为离佩戴者的嘴唇有一定缝隙的文丘里管，嘴前管（7）与左鼻管（5）、右鼻管（3）离人的口、鼻都有一定缝隙或间隙，根据文丘里原理，呼气时强劲的气流会使嘴前管与左鼻管、右鼻管管口周围形成负压，可以实现废气完全置换、吸气轻松的佩戴效果。

Description

一种文丘里负压口罩 技术领域
本发明涉及口罩技术领域，特别是涉及一种文丘里负压口罩。
背景技术
口罩，人类使用了几千年了，想要把它的佩戴舒适度提高的确不是一般的难度。
市场上五花八门的口罩都有：一块布似的、嘴前有大空腔的、脸的左右两边配备有过滤器的等等。
刚刚过去的春节期间，着实让人恐慌的新冠肺炎疫情让我尝尽了戴口罩的苦头，各式各样的口罩我都戴过。关于口罩有什么需要改变，我认为归纳起来有如下几方面：
1、进气出气慢，呼吸不轻松。一块布似的口罩只有口鼻前部一点点面积起通气的作用，其余的大部分面积都紧帖在脸上起不到通气的作用。
2、废气循环，时间长了缺氧。只要是嘴前有空腔的口罩无论是否有排气阀，口中呼出的废气始终是在空腔里循环，戴久了就使人感觉到憋气，极端不舒服。
3、散热不好，面部感觉灼热。特别是嘴前有空腔的口罩，心里感觉氧气吸入很少，总是怀疑吸入的大部分是热腾腾的。
4、鼻梁两边漏气，容易雾化眼镜。现在市场上无论什么类型的口罩，呼出气体时，口罩内总是处于正压状态。由于鼻梁偏高，鼻梁两边都极易漏气，加上热气轻，往上跑，所以直接雾化眼镜。
5、不能清洗，单次使用费用高。口罩不能清洗是指口罩过滤面料不能清洗，而有的带有阀门的口罩也是用一次就丢了，浪费性很大。
我明白了，口罩，这个不起眼的小小日常用品，里面隐藏着一个几千年未解的世界性难题：嘴前空腔容积小过滤空气不畅，嘴前空腔容积大又废气置换率不高。
有什么办法解决上述问题呢？我作了如下尝试。
发明内容
针对现有技术的不足，本发明提供了一种文丘里负压口罩，解决了上述背景技术中的世界性难题。
我们知道，意大利物理学家文丘里发明了文氏效应，此发明的主要含义是：受限流动在通过缩小的过流断面时，流体出现流速增大的现象，其流速与过流断面成反比。而由伯努利定律知流速的增大伴随流体压力降低。用通俗的话说：文丘里效应是指在高速流动的流体附近会产生负压，从而产生吸附作用。
为解决世界性难题，本发明通过以下技术方案予以实现：
一种文丘里负压口罩，包括过滤布、设有右鼻管管口的右鼻管、设有左鼻管管口的左鼻管、设有嘴前管管口的嘴前管、单向排气阀、鼻尖堵片和口罩带，在过滤布的中部设置单向排气阀，在单向排气阀的内侧设置嘴前管，嘴前管设计为离佩戴者的嘴唇有一定缝隙的文丘里管，左鼻管、右鼻管设置在嘴前管上，左鼻管和右鼻管的一端通气口都与单向排气 阀的阀片活动部分位置相对并且离阀片有一定间隙，另一端通过鼻尖堵片控制使左鼻管管口、右鼻管管口与佩戴者的鼻孔之间有一定缝隙，当佩戴者从鼻孔呼气时，左、右鼻孔出来的强劲气流首先会使左鼻管管口、右鼻管管口周围产生负压，此周围的空气将随强劲气流一起吸入左鼻管、右鼻管，然后左鼻管、右鼻管内的强劲气流对着单向排气阀的阀片冲出去时，嘴前管内靠近单向排气阀内侧周围就会产生负压，此周围的空气将随强劲气流一起从单向排气阀排出；当佩戴者从嘴唇呼气时，从嘴唇出来的强劲气流会使嘴前管管口周围产生负压，此周围的空气将随强劲气流一起被吸入到嘴前管内继而经单向排气阀排出，从而使过滤布腔内总是处于负压的状况，很好地解决了嘴前空腔容积小过滤空气不畅、嘴前空腔容积大又废气置换率不高的问题，实现了废气完全置换、吸气特别轻松的理想佩戴效果。
可选的，所述嘴前管管口的形状为圆形或者椭圆形或者唇形或者方形。
可选的，所述左鼻管和右鼻管一体成型，或者左鼻管和右鼻管设计成与佩戴者左右鼻孔位置相对的同一支管。
可选的，所述左鼻管、右鼻管和嘴前管为整体组合件，或者一体成型构件。
进一步的，所述单向排气阀与嘴前管连接，并部分裸露在过滤布的外侧。
本发明文丘里负压口罩与市场现行的一块布口罩或带有空腔的口罩相比具有如下优点：
一、强制性增大了过滤布面积，使吸气变得轻松。
过滤布的材质决定了口罩功能性质，而过滤布实际起过滤作用面积的大小就决定了单位时间内通气量的多少，通气量越大，呼吸就越轻松。一块布似的口罩，如现行的医用口罩，绝大多数的过滤布均紧贴脸部，根本起不到良好通气作用，准确地说是浪费了过滤布。这种口罩相对而言吸入空气时速度慢，呼出时速度也慢，并且还会使嘴前产生正压，口罩边缘四处漏风。本发明文丘里负压口罩在嘴前、鼻孔前必须对应设置有嘴前管和左鼻管、右鼻管，强制性地把过滤布的中部大面积撑起，过滤布的实际通气面积大大增加，这样，吸气时就特别轻松。
二、强制性把废气排走，使氧气供给充足。纵观目前市场上所有的口罩，无论嘴前空腔的大小或是否带有排气阀门，人们呼出废气时，嘴前的空腔内总是处于正压状态。那么，每次呼出后，嘴前的空腔内总是充满一腔废气。前面讲过，嘴前过滤布通气面积小了通气量又少了，要通气大必然要增大嘴前的空腔容积。而空腔容积增大，重复循环的废气又多。这就是给目前口罩行业商家们出的一个尚无解决方案的难题。本发明文丘里负压口罩，无论嘴前的空腔有多大，单向排气阀的内侧有嘴前管，嘴前管离嘴唇有一定缝隙，设置在嘴前管上的左鼻管、右鼻管的一端通气口都与单向排气阀的阀片活动部分位置相对并且离阀片有一定间隙，另一端通过鼻尖堵片控制使左鼻管管口、右鼻管管口与佩戴者的鼻孔之间有一定缝隙，根据文丘里原理，当佩戴者从鼻孔呼气时，左、右鼻孔出来的强劲气流首先会使左鼻管管口、右鼻管管口周围产生负压，此周围的空气将随强劲气流一起吸入左鼻管、右鼻管，然后左鼻管、右鼻管内的强劲气流对着单向排气阀的阀片冲出去时，嘴前管内靠近单向排气阀内侧周围就会产生负压，此周围的空气将随强劲气流一起从单向排气阀排出；当佩戴者从嘴唇呼气时，从嘴唇出来的强劲气流会使嘴前管管口周围产生负压，此周围的空气将随强劲气流一起被吸入到嘴前管内继而经单向排气阀排出，从而使过滤布腔内总是处于负压的状况。所以，人们在呼出废气时，嘴前空腔内始终不会散发废气，保证了吸气时的 氧气供给充足。
三、强制性把空腔内变成负压，使脸部无热气、眼镜不雾化。现在市场上无论什么款式的口罩，当人们呼气时，嘴前的空腔内总是处于正压的状态。口罩内一旦处于正压状态，热气就到处跑，导致整个脸部热腾腾的，感觉很不舒服。由于鼻梁偏高，鼻梁两边都极易漏气，加上热气轻，往上跑，所以直接雾化眼镜镜面。本发明文丘里负压口罩在嘴前设置了嘴前管，在鼻前设置了左鼻管和右鼻管，根据文丘里原理，人们在呼气时能使嘴前的空腔内产生负压；而人们吸入空气时，毫无疑问是在嘴前的空腔内产生负压，那么，无论什么时候，嘴前的空腔内始终是处于负压的状态。既然嘴前的空腔内不存在有正压的状态，所以脸部无热气、眼镜不雾化。
四、口鼻工作灵活，佩戴轻松自由。细心观察，人们呼吸时：有时只用嘴，有时只用鼻，更有时嘴鼻兼用；左右鼻孔有时都畅通，有时一个通畅而另一个不太通畅。人们休闲时用鼻呼吸多，出大力时用嘴呼吸多或者嘴鼻一起来。如何使人们在任何情况下口罩内不残留废气和不产生正压，人们目前做不到。一块布类的口罩，把嘴唇裹住，进出气不流畅，讲话也不方便。本发明文丘里负压口罩在嘴前设置了嘴前管，在鼻前设置了左鼻管和右鼻管，并且它们都离口、鼻有一定缝隙，人们呼出的强劲气流在管口会产生负压，废气不会散发在嘴前空腔内，人们吸气时嘴前空腔内已经过滤了空气会走捷径从口、鼻前的缝隙中进入，所以呼出和吸入空气都特别轻松。由于口、鼻前有一定缝隙，讲话时也十分方便。更大的优点是无论口鼻处于什么工作状态，废气都不残留，吸气十分轻松。
五、分体组合、调节方便、节省成本、科学环保。目前市场上带有阀门的口罩都是和过滤面料生成在一起，使用一次或几次后就连同阀门一起扔了，既浪费了材料成本又造成不必要的环境污染。其实，我们需要更换的只是过滤布，排气阀门可以清洗后反复利用。本发明文丘里负压口罩在设计嘴前管和左、右鼻管时，大小和位置并不需要因人而异的十分准确，因为它们都离口、鼻有一定缝隙，只要主流气流对准就行。那么，我们就可把嘴前管、左右鼻管做成一个整体，由单向排气阀来因人面异地灵活调节决定结构在过滤布上的位置，更换时只需要更换过滤布。这样，既节省成本、调节方便还科学环保。
附图说明
为了更清楚地说明本发明创造实施例技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明创造的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明文丘里负压口罩作用于定型式口罩的实施结构示意图。
图中：1—过滤布，2—右鼻管管口，3—右鼻管，4—左鼻管管口，5—左鼻管，6—嘴前管管口，7—嘴前管，8—单向排气阀，9—鼻尖堵片，10—口罩带。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行详细描述。需要说明的是，在不冲突的情况下，本申请的实施方式及实施方式中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，所描述的实施方式仅仅是本发明一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，都属于本发明保护的范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在限制本发明。
图1示出本发明文丘里负压口罩的结构示意图。
请参见图1，文丘里负压口罩，包括过滤布1、设有右鼻管管口2的右鼻管3、设有左鼻管管口4的左鼻管5、设有嘴前管管口6的嘴前管7、单向排气阀8、鼻尖堵片9和口罩带10，在过滤布1的中部安装有单向排气阀8，在单向排气阀8的内侧设置嘴前管7，嘴前管7设计为离佩戴者的嘴唇有一定缝隙的文丘里管，左鼻管5、右鼻管3设置在嘴前管7上，左鼻管5和右鼻管3的一端通气口都与单向排气阀8的阀片活动部分位置相对并且离阀片有一定间隙，另一端通过鼻尖堵片9控制使左鼻管管口4、右鼻管管口2与佩戴者的鼻孔之间有一定缝隙，当佩戴者从鼻孔呼气时，左、右鼻孔出来的强劲气流首先会使左鼻管管口4、右鼻管管口2周围产生负压，此周围的空气将随强劲气流一起吸入左鼻管5、右鼻管3，然后左鼻管5、右鼻管3内的强劲气流对着单向排气阀8的阀片冲出去时，嘴前管7内靠近单向排气阀8内侧周围就会产生负压，此周围的空气将随强劲气流一起从单向排气阀8排出；当佩戴者从嘴唇呼气时，从嘴唇出来的强劲气流会使嘴前管管口6周围产生负压，此周围的空气将随强劲气流一起被吸入到嘴前管7内继而经单向排气阀8排出，从而使过滤布1腔内总是处于负压的状况，很好地解决了嘴前空腔容积小过滤空气不畅、嘴前空腔容积大又废气置换率不高的问题，实现了废气完全置换、吸气特别轻松的理想佩戴效果。
嘴前管管口6的形状为圆形或者椭圆形或者唇形或者方形。
左鼻管5和右鼻管3可以一体成型，或者它们设计成与佩戴者左右鼻孔位置相对的同一支管。
左鼻管5、右鼻管3和嘴前管7为整体组合件，或者一体成型构件。优选的，嘴前管7与左鼻管5、右鼻管3结合在一起形成一个组件，这个组件与单向排气阀8采用可位移的灵活固定方式固定在过滤布1之上，用以调节不同脸形的人嘴鼻与鼻尖堵片9的松紧力度。左鼻管管口4、右鼻管管口2对中人的左右鼻孔后，嘴前管管口6就自然与嘴唇中心对中了。
进一步的，单向排气阀8与嘴前管7连接，并部分裸露在过滤布1的外侧。
单向排气阀8安装在嘴前管7上的部位根据过滤布1离嘴唇远近距离具体确定。安装在过滤布1上的单向排气阀8、嘴前管7及左鼻管5和右鼻管3可以以单个组合件生产，用于适配相应类型的口罩滤布。口罩带10的结构形式可以多种多样选择，其中一个优选方案是采用弹性松紧带。
在具体实施中，应该特别注意事项：嘴前管7离嘴唇有一定缝隙；左鼻管5、右鼻管3的一端通气口都与单向排气阀8的阀片活动部分位置相对并且离阀片有一定间隙；左鼻管5、右鼻管3另一端由鼻尖堵片9控制使左鼻管管口4、右鼻管管口2与佩戴者的鼻孔之间有一定缝隙。鼻尖堵片9高出多少由鼻孔中冲出来的气流尽量不散发在过滤布1内为标准设计。嘴前管管口6、左鼻管管口4、右鼻管管口2的形状或者为圆形、方形、椭圆等。如果嘴前管7与 左鼻管5、右鼻管3结合在一起形成一个组件，这个组件与单向排气阀8采用可位移的灵活固定方式固定在过滤布1之上，那么下一次更换时只需要更换过滤布1即可。
毫无疑问，本发明创造文丘里负压口罩还可以有多种变换及改型，并不局限于上述实施方式的具体结构，如嘴前管与左鼻管、右鼻管的形状、大小及安装位置的种种变幻等。总之，本发明创造文丘里负压口罩的保护范围还应包括那些对于本领域普通技术人员来说显而易见的交换、替代及改形。

Claims (5)

  1. 一种文丘里负压口罩，其特征在于，它包括过滤布(1)、设有右鼻管管口(2)的右鼻管(3)、设有左鼻管管口(4)的左鼻管(5)、设有嘴前管管口(6)的嘴前管(7)、单向排气阀(8)、鼻尖堵片(9)和口罩带(10)，在过滤布(1)的中部设置单向排气阀(8)，在单向排气阀(8)的内侧设置嘴前管(7)，嘴前管(7)设计为离佩戴者的嘴唇有一定缝隙的文丘里管，左鼻管(5)、右鼻管(3)设置在嘴前管(7)上，左鼻管(5)和右鼻管(3)的一端通气口都与单向排气阀(8)的阀片活动部分位置相对并且离阀片有一定间隙，另一端通过鼻尖堵片(9)控制使左鼻管管口(4)、右鼻管管口(2)与佩戴者的鼻孔之间有一定缝隙，
    佩戴者从鼻孔呼气时，左、右鼻孔出来的强劲气流首先会使左鼻管管口(4)、右鼻管管口(2)周围产生负压，此周围的空气将随强劲气流一起吸入左鼻管(5)、右鼻管(3)，然后左鼻管(5)、右鼻管(3)内的强劲气流对着单向排气阀(8)的阀片冲出去时，嘴前管(7)内靠近单向排气阀(8)内侧周围就会产生负压，此周围的空气将随强劲气流一起从单向排气阀(8)排出；
    佩戴者从嘴唇呼气时，从嘴唇出来的强劲气流会使嘴前管管口(6)周围产生负压，此周围的空气将随强劲气流一起被吸入到嘴前管(7)内继而经单向排气阀(8)排出，从而使过滤布(1)腔内总是处于负压的状况。
  2. 如权利要求1所述的一种文丘里负压口罩，其特征在于，所述嘴前管管口(6)的形状为圆形或者椭圆形或者唇形或者方形。
  3. 如权利要求1所述的一种文丘里负压口罩，其特征在于，所述左鼻管(5)和右鼻管(3)一体成型，或者左鼻管(5)和右鼻管(3)设计成与佩戴者左右鼻孔位置相对的同一支管。
  4. 如权利要求1所述的一种文丘里负压口罩，其特征在于，所述左鼻管(5)、右鼻管(3)和嘴前管(7)为整体组合件，或者一体成型构件。
  5. 如权利要求4所述的一种文丘里负压口罩，其特征在于，所述单向排气阀(8)与嘴前管(7)连接，并部分裸露在过滤布(1)的外侧。
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