Low resistance pressure equalizing mask with buffer cavity

Abstract

The invention discloses a low-resistance pressure-equalizing mask with a buffer chamber, which is characterized in that it comprises at least one layer of filter sheets, and the inner side of the filter sheets is provided with a buffer sheet connected to the filter sheet through an edge to cover the position of the mouth and nose, and the buffer sheet There is a gap between the filter and the filter to form a first cavity, and at least one of the filter and the buffer is connected with a fixing belt; when the present invention is worn, under the blocking of the buffer, the breath airflow from the mouth and nose directly impacts the filter, and the filter It can maintain a larger effective filtration area, exert a better filtration effect under low-resistance pressure equalization, and provide a more effective tool for personal health protection.

Description

technical field [0001] The invention relates to a mask, in particular to a low-resistance pressure-equalizing mask with a buffer cavity. Background technique [0002] With the improvement of people's health awareness, masks have been used as a protective tool in various fields of our lives, such as medical treatment, chemical industry, furniture manufacturing and other industries. Today, we have to wear masks to travel when the environment is polluted in the process of industrialization To avoid smog damage, the main function of these masks is to isolate and filter microparticles, viruses and harmful gases, and to prevent direct inhalation of microparticles, viruses and harmful gases into the lungs and cause negative effects on personal health. There are many kinds of existing masks, and the most commonly used ones are still sheet-type and folded masks and bowl-type. The sheet-type masks are composed of several layers of filter sheets overlapping; Folding horizontally, you ...

AI Technical Summary

Problems solved by technology

There are many kinds of existing masks, and the most commonly used ones are still sheet-type and folded masks and bowl-type. The sheet-type masks are composed of several layers of filter sheets overlapping; Folding horizontally, you can pull it up and down when wearing it; some bowl masks are composed of bowl-shaped filter sheets with patchwork seams, and some are composed of molded integrally formed bowl-shaped filter sheets; these commonly used masks are Consisting of several overlapping filters, the stretchability of the filter is small when worn, and the filter is directly facing the nose and mouth. Since the filter is closer to the nose and mouth, the pressure difference between the inside and outside of the filter facing the nose and mouth is higher than that far away when inhaling. The unbalanced pressure distribution in the mouth and nose makes the air flow and dust accumulation in different parts of the filter different, causing the filter to not be able to exert its filtering performance in a balanced manner, and the high pressure difference, high flow, and high dust are directly facing the nose and mouth. Greatly increases the penetration rate of micro particles on the filter facing the mouth and nose under the drive of high-speed airflow, and when the filter is close to the nose and mouth, the respiratory airflow has a greater impact on the filter, and the vibration deformation will also increase the micro particles The probability of penetration, when inhaling, the filter will be closer to the nostril under the action of suction, and the wind pressure at the nostril will be higher; the filters of these layers of masks overlap and close together without gaps. Contact, and the part of the filter in contact with the face will lose most of the filtering function, which reduces the effective filtering area of ​​the filter, and sometimes in order to improve the filtering effect, it is usually necessary to reduce the size of the micropores of the filter, whether it is a micropore The reduction in size or effective filtration area will increase the pressure difference between the inside and outside of the filter, resulting in unsmooth airflow and a feeling of suffocation. The increase in pressure difference will increase the airflow velocity at the micropores of the filter. The small micro-particles adhered to the filter under the drive will also pass through the micropores and enter the respiratory tract, affecting the filtering effect; these problems still need to be improved to improve the technology

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