A filter element for a self-suction filter-type particulate respirator

Abstract

The utility model discloses a kind of filter elements of self-suction filter type anti-particle respirator, belong to dust respirator technical field, including bottom shell, fixedly arranged in the three-dimensional filter assembly of the bottom shell inside and the upper cover buckled in the top of the bottom shell, the outside of the bottom shell is provided with filter material renewal assembly, electrostatic filter paper is provided between the three-dimensional filter assembly and the upper cover, the both ends of the electrostatic filter paper protrude the gap between the upper cover and the bottom shell and connect on the filter material renewal assembly.The utility model is through the surface filter paper and three-dimensional flow guide structure of renewability, synchronously conquers the double bottleneck of material waste and insufficient air permeability in prior art, while having use comfort along with guaranteeing protection performance.

Description

Technical Field

[0001] This utility model relates to the field of dust respirator technology, and in particular to a filter element of a self-priming filter-type particulate respirator. Background Technology

[0002] As a type of personal protective equipment, the core protective component of a self-priming filtering particulate respirator is the particulate filter cartridge. These cartridges are typically made of electrostatically electret materials, utilizing electrostatic adsorption to efficiently capture fine particulate matter from the ambient air.

[0003] However, existing particulate filter cartridges have significant shortcomings in terms of breathability. Firstly, the filter cartridges are designed for single-use replacement. When used in environments with high particulate matter content, the surface of the filter element quickly adsorbs a large amount of impurities, leading to a significant increase in breathing resistance. At this point, even though the adsorption capacity of the rear components of the filter cartridge is not yet saturated and the amount of impurities is relatively small, the entire cartridge must be discarded. This not only wastes materials, but more importantly, the excessive accumulation of surface impurities directly leads to a severe decrease in breathability.

[0004] On the other hand, existing filter cartridges generally adopt a flat-lay filter material structure design. This simple stacking method itself creates a large obstruction to airflow, resulting in high resistance when air flows through the filter material and poor air permeability.

[0005] Based on this, a filter element for a self-priming filter respirator with easy surface filter paper replacement and good air permeability is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a filter element for a self-priming filter-type particulate respirator to solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides a filter element for a self-priming filtering particulate respirator, including a bottom shell, a three-dimensional filter assembly fixedly disposed inside the bottom shell, and a top cover snapped onto the top of the bottom shell. A filter media replacement assembly is disposed on the outside of the bottom shell, and an electrostatic filter paper is disposed between the three-dimensional filter assembly and the top cover. The two ends of the electrostatic filter paper extend out of the gap between the top cover and the bottom shell and are connected to the filter media replacement assembly.

[0008] Preferably, the three-dimensional filtration assembly consists of a pleated filter element layer, a flow guiding layer, and an activated carbon granule layer arranged sequentially from top to bottom. The sidewalls of the pleated filter element layer and the flow guiding layer are both adhered to the bottom shell. Anti-overflow filter paper is provided between the activated carbon granule layer and the bottom shell, and between the activated carbon granule layer and the flow guiding layer.

[0009] Preferably, the flow guiding layer is composed of a support frame and multiple wavy flow guiding strips arranged circumferentially inside the support frame, with the near-center ends of the flow guiding strips forming a cavity.

[0010] Preferably, the filter media replacement assembly includes a one-way limiting member and a recovery reel and a feeding reel respectively disposed on both sides of the bottom shell. The feeding reel and the bottom shell, and one end of the recovery reel and the bottom shell are rotatably connected by a connector. The other end of the recovery reel is fixedly connected to a knob.

[0011] Preferably, the two ends of the electrostatic filter paper are respectively wound on the recycling roll and the feeding roll, and the middle part of the electrostatic filter paper abuts against the top of the pleated filter element layer.

[0012] Preferably, one end of the one-way limiting member is fixedly connected to the bottom shell, and the other end of the one-way limiting member is provided with an inner ratchet. The rewind spool is provided with a plurality of ratchet teeth in the circumferential direction, and the ratchet teeth abut against the inner ratchet.

[0013] Preferably, the bottom of the base shell is provided with a mask interface.

[0014] Therefore, the filter element of the self-priming filtering respirator with the above-described structure of this utility model has the following beneficial effects:

[0015] (1) The filter media replacement component enables convenient replacement of the surface electrostatic filter paper: When the air permeability of the electrostatic filter paper decreases due to the adsorption of particulate matter, the user only needs to turn the knob to recycle the roller and roll up the contaminated filter paper. At the same time, the feed roller releases new filter paper to cover the top of the pleated filter element layer, avoiding the problem of severe air permeability reduction due to surface blockage and significantly reducing material waste. Meanwhile, the inner ratchet and ratchet meshing structure of the one-way limiting component further ensures that the contaminated filter paper cannot be retracted, ensuring filtration stability.

[0016] (2) In the three-dimensional filter assembly, the top pleated filter layer expands the filtration area and reduces airflow resistance through the pleated structure; the middle guide layer is composed of wave-shaped guide strips, and the central cavity formed by the surrounding strips actively guides the airflow to concentrate and pass through, breaking the dispersed airflow path of the traditional flat filter material; the bottom activated carbon particle layer is wrapped with anti-overflow filter paper to prevent particle leakage and blockage of airflow; at the same time, the wave structure of the guide layer compacts the activated carbon layer and supports the pleated filter, optimizes the uniformity of airflow, significantly reduces breathing resistance, and improves the overall air permeability.

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional filter assembly structure according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the flow guide layer structure according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the filter media replacement assembly structure according to an embodiment of the present invention. Figure 1 ;

[0022] Figure 5 This is a schematic diagram of the filter media replacement assembly structure according to an embodiment of the present invention. Figure 2 ;

[0023] Figure 6 This is a schematic diagram of the internal ratchet structure according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the face mask interface structure according to an embodiment of the present utility model;

[0025] Figure 8 This is a schematic diagram of the limiting block structure according to an embodiment of the present utility model;

[0026] Figure 9 This is a schematic diagram of the protective cover structure according to an embodiment of the present utility model;

[0027] Figure label:

[0028] 1. Bottom shell; 2. 3D filter assembly; 21. Pleated filter element layer; 22. Flow guide layer; 221. Support frame; 222. Flow guide strip; 223. Cavity; 23. Activated carbon granule layer; 24. Anti-overflow filter paper; 3. Electrostatic filter paper; 4. Top cover; 5. Filter media replacement assembly; 51. One-way limiting component; 52. Recycle reel; 53. Feed reel; 54. Connector; 55. Knob; 56. Inner ratchet; 57. Ratchet; 6. Mask interface. Detailed Implementation

[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0030] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] Example

[0032] like Figures 1-7 As shown, the filter element of a self-priming filtering particulate respirator of this utility model includes a bottom shell 1, a three-dimensional filter assembly 2, an electrostatic filter paper 3, a filter material replacement assembly 5, and a top cover 4. The bottom of the bottom shell 1 has a conventional mask interface 6. The three-dimensional filter assembly 2 is bonded to the inside of the bottom shell 1, and the top of the three-dimensional filter assembly 2 abuts against the electrostatic filter paper 3. The electrostatic filter paper 3 serves as the first-stage filter layer for adsorbing large dust particles. The top cover 4 is wrapped around the outside of the electrostatic filter paper 3 and is snapped to the top of the bottom shell 1 (by conventional fasteners located on the inside of the top cover 4 and the outside of the bottom shell 1). A gap is left between the top cover 4 and the bottom shell 1 for airflow to enter and exit.

[0033] The filter media replacement assembly 5 is located on both sides of the bottom shell 1. The two ends of the electrostatic filter paper 3 extend out of the gap between the top cover 4 and the bottom shell 1 and are fixedly connected to the filter media replacement assembly 5. In this embodiment, to ensure structural sturdiness, the fasteners are located on both sides of the long side of the bottom shell 1, and the filter media replacement assembly 5 is located on both sides of the short side of the bottom shell 1.

[0034] The three-dimensional filter assembly 2 consists of a pleated filter layer 21, a flow guiding layer 22, and an activated carbon granule layer 23 from top to bottom. The outer walls of the pleated filter layer 21 and the flow guiding layer 22 are bonded to the inner wall of the bottom shell 1. Anti-overflow filter paper 24 (to prevent activated carbon granules from spilling out) is provided between the activated carbon granule layer 23 and the bottom shell 1, and between the activated carbon granule layer 23 and the flow guiding layer 22. The activated carbon granule layer 23 is used to adsorb harmful gases and odors. The flow guiding layer 22 consists of an outer support frame 221 and multiple flow guiding strips 222 arranged circumferentially inside the support frame 221. The support frame 221 and the flow guiding strips 222 are an integral structure, and the flow guiding strips 222 are wavy. A cavity 223 is formed around the center of the flow guiding strips 222 (located in the center or off-center) to ensure smooth airflow in the core area.

[0035] The pleated filter layer 21, through its pleated structure, increases the effective filtration area, thereby achieving lower airflow resistance and better breathing comfort, and enhancing the ability to intercept particulate matter. The wavy guide strips 222, with their ridges and troughs, support the top pleated filter layer and compact the bottom activated carbon particle layer 23, preventing overflow. At the same time, they guide airflow towards the central cavity 223, avoiding the independent folded cavities (caused by the flat structure) and improving breathability.

[0036] The filter media replacement assembly 5 includes a one-way limiting component 51, a connector 54, a knob 55, a recovery reel 52, and a feeding reel 53. The recovery reel 52 and the feeding reel 53 are respectively located on both sides of the bottom shell 1. One end of the recovery reel 52 is rotatably connected to the bottom shell 1 via a conventional connector 54 (one end is welded to the bottom shell 1, and the other end has a hole for the reel to rotate). The other end of the recovery reel 52 is fixedly connected to a knob 55. To prevent the recovery reel 52 from detaching due to lateral movement, such as... Figure 8 As shown, in this embodiment, conventional limiting blocks are added to the recycling reels 52 on both sides of the unidirectional limiting member 51, and both ends of the feeding reel 53 are rotatably connected to the bottom shell 1 through the connecting member 54.

[0037] The two ends of the electrostatic filter paper 3 are respectively wound onto the recovery roll 52 and the feeding roll 53 (the edges are adhered to the rolls), and the middle of the electrostatic filter paper 3 abuts against the top of the pleated filter element layer 21. In this embodiment, the ratchet 57 is circumferentially arranged on the recovery roll 52 between the wound electrostatic filter paper 3 and the knob 55, and the outer side of the ratchet 57 abuts against the inner ratchet 56 of the one-way limiting member 51 (the inner ratchet 56 is located at one end of the one-way limiting member 51), and the other end of the one-way limiting member 51 is welded to the bottom shell 1. Figure 9 As shown, in order to prevent the feed roll 53 from being contaminated, this embodiment adds a conventional protective cover to the area between the feed roll 53 and the upper cover 4.

[0038] Therefore, when the electrostatic filter paper 3 located above the pleated filter layer 21 adsorbs too much dust, the knob 55 is turned in the direction of filter material recycling (clockwise in this embodiment). At this time, the ratchet 57 slides over the top of the inner ratchet 56, and the ratchet 57 and the recycling roll 52 can rotate freely. The recycling roll 52 rolls up the contaminated filter paper, and at the same time, it drives the new electrostatic filter paper 3 to unfold from the feed roll 53 and gradually rotate to the top of the pleated filter layer 21 to complete the replacement of the electrostatic filter paper 3. When the knob 55 is turned in the opposite direction of filter material recycling (counterclockwise in this embodiment), the ratchet 57 engages with the inner ratchet 56, locking the recycling shaft and preventing it from rotating in the opposite direction, thereby preventing the contaminated electrostatic filter paper 3 from retracting.

[0039] In use, first connect the mask interface 6 at the bottom of the filter element to the mask. The airflow enters and exits through the gap between the bottom shell 1 and the top cover 4. The air intake path is: air → gap between the top cover 4 and the bottom shell 1 → electrostatic filter paper 3 (adsorbs large particles) → pleated filter layer 21 (high-efficiency interception) → guide layer 22 (optimizes airflow) → activated carbon layer (purifies gas) → mask interface 6 → user.

[0040] When the electrostatic filter paper 3 adsorbs too much dust and its air permeability decreases, simply turn the knob 55 in the recycling direction to roll up the contaminated filter paper and simultaneously release new filter paper to cover the pleated filter element layer 21. If the breathing resistance still increases significantly after the electrostatic filter paper 3 is replaced (deep filter material is saturated), the entire filter element needs to be replaced.

[0041] Therefore, the filter element of this utility model, which adopts the above-mentioned structure, is a self-priming filtering respirator for particulate matter. The filter material replacement component enables convenient replacement of the surface electrostatic filter paper—simply turning the knob allows the recycling roll to reel in the contaminated filter paper, while the feeding roll simultaneously releases new filter paper to cover the top of the pleated filter element layer, avoiding decreased air permeability and material waste caused by surface blockage. The inner ratchet and ratchet engagement structure of the one-way limiting component ensures that the contaminated filter paper cannot retract. In the three-dimensional filtration component, the pleated structure of the pleated filter element layer expands the filtration area, the wave-shaped guide strip of the flow guiding layer forms a central cavity to concentrate and guide airflow, and the activated carbon granule layer is wrapped with anti-overflow filter paper to prevent leakage. The three components work together to break the airflow obstruction of the traditional flat structure, significantly reducing breathing resistance and improving air permeability.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A filter element for a self-priming, filtering particulate respirator, characterized in that: The device includes a bottom shell, a three-dimensional filter assembly fixedly disposed inside the bottom shell, and a top cover snapped onto the top of the bottom shell. A filter media replacement assembly is disposed on the outside of the bottom shell. An electrostatic filter paper is disposed between the three-dimensional filter assembly and the top cover. Both ends of the electrostatic filter paper extend out of the gap between the top cover and the bottom shell and are connected to the filter media replacement assembly.

2. The filter element of a self-priming filtering particulate respirator according to claim 1, characterized in that: The three-dimensional filtration assembly consists of a pleated filter element layer, a flow guiding layer, and an activated carbon particle layer arranged sequentially from top to bottom. The sidewalls of the pleated filter element layer and the flow guiding layer are both bonded to the bottom shell. Anti-overflow filter paper is provided between the activated carbon particle layer and the bottom shell, and between the activated carbon particle layer and the flow guiding layer.

3. The filter element of a self-priming filtering particulate respirator according to claim 2, characterized in that: The flow guide layer has a cavity at its center. The flow guide layer consists of a support frame and multiple flow guide strips. The multiple flow guide strips are arranged around the cavity, and the rear ends of the flow guide strips are all connected to the inner wall of the support frame.

4. The filter element of a self-priming filtering particulate respirator according to claim 3, characterized in that: The filter media replacement assembly includes a one-way limiting component and a recovery reel and a feeding reel respectively disposed on both sides of the bottom shell. The feeding reel and the bottom shell are rotatably connected by connectors, and one end of the recovery reel and the bottom shell are rotatably connected by connectors. A knob is fixedly connected to the other end of the recovery reel.

5. The filter element of a self-priming filtering particulate respirator according to claim 4, characterized in that: The two ends of the electrostatic filter paper are respectively wound around the recycling roll and the feeding roll, and the middle part of the electrostatic filter paper abuts against the top of the pleated filter element layer.

6. The filter element of a self-priming filtering particulate respirator according to claim 5, characterized in that: One end of the one-way limiting member is fixedly connected to the bottom shell, and the other end of the one-way limiting member is provided with an inner ratchet. The rewind spool is provided with a plurality of ratchet teeth in the circumferential direction, and the ratchet teeth abut against the inner ratchet.

7. The filter element of a self-priming filtering particulate respirator according to claim 1, characterized in that: The bottom of the base shell is provided with a mask interface.

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