Dust masks

Abstract

The invention relates to a dust mask, comprising a mask body, an exhalation valve is arranged at the front end of the mask body, filter windows are arranged on both sides of the mask body, filter discs are arranged in the filter windows, dust removal butterfly wings are also arranged outside the filter windows, an air flow channel is arranged in the dust removal butterfly wings, the upper end of the air flow channel is communicated with the filter window, and the lower end is an air inlet; the air flow channel is in a curved shape, and a dust adsorption layer is arranged on the inner wall of the air flow channel. The invention has two-stage filtration, and the dust removal butterfly wings can capture dust in the air flowing through the air flow channel to constitute primary filtration; the air intersects with the filter disc to filter the residual dust, which is secondary filtration; the dust removal butterfly wings pass through the curved air flow channel, and utilize the characteristics of large inertia force and gravity of particles to design an inner wall with adsorption function, so that the inner wall of the air flow channel can effectively capture dust particles during the air turning process; the dust removal butterfly wings have a large air inlet, the air flow channel does not block the air flow, the air intake is unobstructed, the filter disc only needs to filter a small amount of residual dust, and the resistance to the air flow is small, thereby solving the problem of poor breathing.

Description

Technical Field

[0001] The invention belongs to a dust mask. Background Art

[0002] Many workplaces have a large amount of dust, which has an adverse effect on the health of workers. Commonly used filter-type dust masks mainly rely on filter cloth, filter cotton or their composite materials to filter the air. The filtering principle of this mask is that the air passes through the filter layer, intersects with the filter cloth and filter cotton, and intercepts the particles in the dust, thereby blocking the dust from entering the respiratory tract. The filter surface of the mask has small and dense gaps, the air flow is not smooth, and the user has a large resistance when inhaling. Moreover, as the wearing time increases, the dust trapped on the filter increases rapidly, resulting in a gradual increase in breathing resistance. When the operator feels that the breathing resistance is large, he often takes off the mask and does not use it, so that the protective equipment does not play its due role. In addition, when replacing the filter element, the existing dust mask needs to manually remove the filter element. There is a lot of dust attached to the filter element. During the replacement process, dust and bacteria will contaminate the hands again. During the replacement operation, the dust on the filter element falls off, causing the dust to be inhaled into the human body again by the user. Summary of the invention

[0003] The present invention aims to solve the above problems, thereby providing a mask with small breathing resistance and higher comfort.

[0004] The present invention solves the above-mentioned problem by adopting the following technical solution:

[0005] A dust mask comprises a mask body covering the mouth and nose, an exhalation valve is arranged at the front end of the mask body, filter windows are arranged on both sides of the mask body, filter discs are arranged at the filter windows, dust removal butterfly wings are also installed outside the filter windows, an air flow channel is arranged in the dust removal butterfly wings, the upper end of the air flow channel is communicated with the filter window, and the lower end is an air inlet; the air flow channel is in a curved shape, and a dust adsorption layer is arranged on the inner wall of the air flow channel.

[0006] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects:

[0007] The present invention has two-stage filtration. First, the lower ends of all the air flow channels of the dust removal butterfly wing are integrated into a total air inlet, and the structural air intake area is large; the air flow channel is parallel to the air flow, does not block the air flow, and the air flow is smooth; the dust adsorption layer in the dust removal butterfly wing utilizes the gravity and inertial force exerted on the dust particles to separate the dust from the air, forming a primary filtration; then, the air passes through the filter disc to intercept the remaining dust, forming a secondary filtration; in this invention, the filter disc only needs to filter a small amount of remaining dust, has a small thickness, and has a weak resistance to the air flow. The present invention solves the problems of large breathing resistance and poor breathing in ordinary filter element type dust masks.

[0008] Preferably, a further technical solution of the present invention is:

[0009] The dust adsorption layer is a fiber layer. On the one hand, the fiber layer is a felt surface, which can effectively capture dust particles. On the other hand, the friction between the fiber and the air can make the surface charged, and filter smaller particles through electrostatic adsorption.

[0010] The dust removal butterfly wing is composed of multiple layers of laminated sheets, and hot pressing strips are arranged at equal intervals between two adjacent layers of laminated sheets to connect them, and an air flow channel with an eye-shaped cross-section is formed between the hot pressing strips; this structure is easy to process.

[0011] The dust removal butterfly wing is composed of multiple layers of laminated sheets, and vertical grids are arranged at equal intervals between adjacent layers of laminated sheets to form air flow channels with square cross-sections between the vertical grids. The air flow channels of this structure are divided and supported by the vertical grids, and the channel cross-section is larger.

[0012] The vertical grid is fixedly connected to the next layer of laminated sheets, the top of the vertical grid is inserted into the clamping groove, and the clamping groove is fixedly connected to the previous layer of laminated sheets. This structure makes the layers detachable, which is convenient for cleaning the inside of the airflow channel.

[0013] The vertical grid is composed of a protective net, cotton clip strips and support strips in sequence. The cotton clip strips are water-containing layers. The cotton clip strips moisten the air flow channel, enhance the adhesion ability of the inner wall of the channel, and the cotton clip strips have a stronger dust capture ability.

[0014] A partition is provided on the upper surface of the vertical grid at the lower side of the airflow channel, and the angle between the partition and the vertical grid is a dust storage groove. The dust storage groove hides the larger particles adsorbed in the airflow channel under the airflow to prevent the subsequent airflow from carrying these particles upward again.

[0015] A grid plate is provided at the filter window, and a filter is provided on the outer surface of the grid plate. The upper end of the filter is mounted on the first rotating shaft, and the lower end is mounted on the second rotating shaft. In this structure, the first rotating shaft is a new filter plate roller, and the second rotating shaft is an old filter plate storage roller. This structure greatly reduces direct contact between people and old filters, and the filter is easy to replace, clean and hygienic.

[0016] The transmission structure of the second rotating shaft is: a third rotating shaft is arranged at the lower part or the upper part of the cover body, and the third rotating shaft is connected to the second rotating shaft through a transmission belt; gear one is installed at the end of the third rotating shaft, gear one is meshed with gear two, gear two is fixedly connected with a hand wheel, and the hand wheel is arranged outside the cover body.

[0017] The transmission structure of the second rotating shaft can also be: the second rotating shaft is arranged at the top or bottom of the cover body, the shaft end of the second rotating shaft is installed with gear one, gear one is meshed with gear two, gear two is fixedly connected with the hand wheel, and the hand wheel is arranged outside the cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the dust filtering principle of the dust mask's dust removal butterfly wing;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the dust-removing butterfly wing of the dust mask taken along line AA;

[0021] Figure 4 This is a schematic diagram of the second cross-sectional structure of the dust mask's dust-removing butterfly wing taken along line AA;

[0022] Figure 5 This is the improved structure diagram of the dust removal butterfly wing of the dust mask;

[0023] Figure 6 This is an example diagram of installing a humidification structure in the dust removal butterfly wing;

[0024] Figure 7 Design the structure diagram of the dust storage tank in the dust removal butterfly wing;

[0025] Figure 8 A filter installation structure 1;

[0026] Fig. 9 Installing structure 2 for the filter;

[0027] Fig.10 for Fig. 9 Enlarged view of the middle handwheel and shaft installation structure.

[0028] In the figure: cover body 1, exhalation valve 2, dust removal butterfly wing 3, air flow channel 4, hot pressing strip 5, longitudinal grid 6, protective net 61, cotton clamp strip 62, support strip 63, spacer 7, first rotating shaft 8, second rotating shaft 9, third rotating shaft 10, transmission belt 11, hand wheel 12, filter 13, grid plate 1-1, gear one 9-1, gear two 12-1. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0030] See attached Figure 1 As shown, a dust mask comprises a mask body 1 covering the mouth and nose, an exhalation valve 2 is provided at the front end of the mask body 1, filter windows are provided on both sides of the mask body, filter sheets 13 are provided at the filter windows, dust removal wings 3 are also installed outside the filter windows, an air flow channel 4 is provided in the dust removal wings 3, the upper end of the air flow channel 4 is communicated with the filter window, and the lower end is an air inlet; the air flow channel 4 is in a curved shape, and a dust adsorption layer is provided on the inner wall of the air flow channel 4.

[0031] In the dust mask of the above structure, dust-containing gas flows into the air inlet at the lower end of the butterfly wing. Since the air flow channel 4 is curved, the air flow can flow smoothly to the filter window. At the same time, since the air flow channel 4 is curved or arc-shaped, Figure 2As shown, when the airflow turns, it adheres to the upper side wall of the airflow channel due to the inertial force, and falls due to the gravity, so that it adheres to one side wall of the airflow channel, and is separated, thereby achieving primary purification of the dust-containing gas. When the gas reaches the filter 13, the filter 13 filters out the remaining dust particles to achieve secondary purification. Since the air reaching the position of the filter 13 has passed through the dust removal butterfly wings to remove most of the dust, the filter 13 does not need to use too thick material, so the resistance to the airflow can be greatly reduced compared to the thickness of the filter membrane of a conventional mask that wraps the mouth and nose as a whole. The thinner the filter, the less resistance to the airflow, and the user breathes more smoothly.

[0032] The butterfly wing filter structure designed in the present invention is installed on both sides of the cover body 1, and there is no need to set an integral filter structure in front of the cover body 1. The thickness of the cover body 1 is greatly reduced to avoid blocking the line of sight.

[0033] The dust adsorption layer on the inner wall of the airflow channel of the present invention is a fiber layer. On the one hand, since the fiber layer is a felt surface, it can effectively capture dust particles, and on the other hand, the friction between the fiber and the air can charge the surface, and smaller particles can be filtered through electrostatic adsorption.

[0034] Example 1: Figure 3 As shown, the dust-removing butterfly wing 3 is composed of multiple layers of laminates, and hot pressing strips 5 are arranged at equal intervals between two adjacent layers of laminates to connect them to each other, and an air flow channel 4 with an eye-shaped cross-section is formed between the hot pressing strips 5. The laminates, especially the laminates on the surface of the dust-removing butterfly wing and the laminates on the bottom layer (the bottom layer laminates are the last layer close to the ears or face) are made of airtight materials, which can be plastic materials or non-woven fabric materials with plastic layers, which effectively prevent air from entering from the outer wall of the butterfly wing and concentrate air into the air inlet. In this example, the air flow channels 4 are formed by hot pressing, which is easy to process and light in weight. Using the structure and material of this example, the dust-removing butterfly wing 3 can be designed to be a detachable structure relative to the cover body 1 and used as a disposable consumable component.

[0035] Example 2: Figure 4 , Figure 5 As shown, the dust removal butterfly wing 3 is composed of multiple layers of laminated sheets, and the adjacent layers of laminated sheets are connected by longitudinal grids 6 at equal intervals, and a square cross-section airflow channel 4 is formed between the longitudinal grids 6. The square airflow channel supported by the longitudinal grids 6 has a large airflow flow rate, and the airflow can flow more smoothly.

[0036] The wing of the dust removal butterfly wing 3 of the present invention can also be designed as a detachable structure. Figure 5 , Figure 6 As shown, the lower laminated sheets of the dust removal butterfly wing 3 are fixedly connected together, the upper laminated sheets of the dust removal butterfly wing 3 are detachably connected, and the middle longitudinal grid is also designed as a detachable structure, so that the laminated sheets can be unfolded, thereby facilitating the cleaning of the airflow channel 4. For example, based on the above example 2, it is further designed as follows: Figure 5 The vertical grid 6 is fixedly connected to the next layer of laminated sheets 32, the top of the vertical grid is inserted into the clamping groove 31-1, and the clamping groove 31-1 is fixedly connected to the previous layer of laminated sheets.

[0037] Further, if Figure 6 As shown, the vertical grid 6 is composed of a protective net 61, a cotton clip strip 62 and a support strip 63 in sequence, and the cotton clip strip 62 is a water-containing layer. The cotton clip strip 61 forms an air humidification structure of the air flow channel 4, and this humidification structure has a stronger capture effect on dust particles.

[0038] At the lower end of the air flow channel 4, i.e. the air inlet end, the dust particles entering the mask with the air are the largest, and the proportion of large particles is also large. These particles will fall due to gravity. Figure 7 As shown, the present invention is provided with reversed spacers 7 on the upper surface of the lower part of the vertical grid 6, and the angle between the spacers 7 and the vertical grid 6 is a dust storage groove. These dust storage grooves block the particles under the spacers to prevent these small particles from being repeatedly carried upward by the subsequent airflow.

[0039] A grid plate 1-1 is provided at the filter window, and a filter 13 is provided on the outer surface of the grid plate 1-1. The upper end of the filter 13 is mounted on the first rotating shaft 8, and the lower end is mounted on the second rotating shaft 9. In this structure, the first rotating shaft 8 is a new filter roll, the second rotating shaft 9 is an old filter storage roll, and the grid plate 1-1 is used to support the filter 13. After a period of use, when the filtering effect of the filter is reduced, the second rotating shaft 9 can be rotated to roll the dusty part onto the second rotating shaft 9, and the new part of the filter is naturally moved to the position of the filter window, solving the problem of automatic replacement of the filter.

[0040] The present invention provides two embodiments of the transmission structure of the second rotating shaft 9:

[0041] Embodiment 1: Figure 8 As shown, a third rotating shaft 10 is arranged at the lower part or the upper part of the cover body 1, and the third rotating shaft 10 is connected to the second rotating shaft 9 through a transmission belt 11; a gear 1 is installed at the end of the third rotating shaft 10, the gear 1 is meshed with the gear 2, the gear 2 is fixedly connected with the hand wheel 12, and the hand wheel 12 is arranged outside the cover body 1.

[0042] Embodiment 2: Fig. 9 , Fig.10 As shown, the second rotating shaft 9 is arranged at the top or bottom of the cover body, and a gear 1 9 - 1 is installed at the shaft end of the second rotating shaft 9 . The gear 1 9 - 1 is meshed with the gear 2 12 - 1 . The gear 2 12 - 1 is fixedly connected with the hand wheel 12 . The hand wheel 12 is arranged outside the cover body 1 .

[0043] The roll-type filter and the filter installation structure provided by the present invention facilitate the replacement of the filter 13. When a worker wants to replace the filter during work, he does not need to take off the mask, nor does he need to touch the filter with his hands. When the whole roll is used up, the roll can be discarded.

[0044] The dust mask provided by the present invention has the following beneficial effects: 1) It has a two-stage filtering structure, and the primary filtering is that the dust removal butterfly wing removes most of the particles in the air through the dust adsorption capacity; the secondary filtering is that the air passes through the filter before entering the mask body, and the filter filter cleans the remaining dust; 2) The lower ends of all air flow channels are integrated into a total air inlet, the structural air inlet area is large, the air flow channel structure does not block the air flow, and the air flow is smooth; 3) The directions of the air flow channels of the dust removal butterfly wing do not intersect with the air, and the air is introduced into the mask body through diversion, which has little resistance to the air flow; 4) The air flow channel uses the principle that the inertia force of particles is greater than that of air, and the inner wall is used to capture dust particles. The principle of gravity is used to capture dust and keep the dust in the air flow channel, thereby achieving the purpose of removing dust; 5) The electrostatic adsorption capacity of the fiber layer and the adhesion capacity of the humidification structure can capture tiny particles; 6) Two filter installation structures that cooperate with each other to roll up and roll in can realize the direct replacement of new filters without contacting the filters; 7) The dust removal structure is designed on both sides of the mask body to reduce the thickness of the mask body and avoid obstructing the line of sight.

[0045] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A dust mask, comprising a mask body covering the mouth and nose, an exhalation valve being provided at the front end of the mask body, filter windows being provided at both sides of the mask body, and filter sheets being provided at the filter windows, characterized in that: A dust removal butterfly wing is also installed outside the filter window, and an air flow channel is arranged in the dust removal butterfly wing. The upper end of the air flow channel is connected to the filter window, and the lower end is an air inlet. The air flow channel is in a curved shape, and a dust adsorption layer is arranged on the inner wall of the air flow channel. The dust removal butterfly wing is composed of multiple layers of laminated sheets, and vertical grids are arranged at equal intervals between two adjacent layers of laminated sheets to form an air flow channel with a square cross-section; the vertical grid is fixedly connected to the next layer of laminated sheets, the top of the vertical grid is inserted into the clamping groove, the clamping groove is fixedly connected to the previous layer of laminated sheets, and the vertical grid is composed of a protective net, a cotton clamping strip and a support strip in sequence; A partition is provided on the upper surface of the longitudinal grid at the lower side of the airflow channel, and the angle between the partition and the longitudinal grid is a dust storage groove.

2. The dust mask according to claim 1, characterized in that: The cotton strips are the water-containing layer.

3. The dust mask according to claim 1, characterized in that: A grid plate is arranged at the filter window, a filter disc is arranged on the outer surface of the grid plate, the upper end of the filter disc is mounted on the first rotating shaft, and the lower end of the filter disc is mounted on the second rotating shaft.

4. The dust mask according to claim 3, characterized in that: A third rotating shaft is arranged at the lower part or the upper part of the cover body, and the third rotating shaft is connected to the second rotating shaft through a transmission belt; a gear 1 is installed at the end of the third rotating shaft, the gear 1 is meshed with the gear 2, the gear 2 is fixedly connected with the hand wheel, and the hand wheel is arranged outside the cover body.

5. The dust mask according to claim 3, characterized in that: The second rotating shaft is arranged at the top or bottom of the cover body, and a gear 1 is installed at the shaft end of the second rotating shaft. The gear 1 is meshed with the gear 2, and the gear 2 is fixedly connected with the hand wheel, and the hand wheel is arranged outside the cover body.

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