Respirator filtering element capable of increasing effective filtering area
By introducing a partition design into the filter element of the respirator, the two filter layers can be spread out, solving the problems of large air resistance, poor breathability and reduced effective filter area, and achieving more efficient filtration effect and better breathability performance.
Patent Information
- Application Number
- CN202421409056.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The existing respirator filter elements have problems such as large air resistance, poor breathability and reduced effective filtration area.
Using a design that includes two or more filter layers, one or more dividers and joints, the adjacent two filter layers are separated by partitions, forming an air circulation cavity, and connected to the respirator through a through hole.
It significantly improves the effective filtration area, improves filtration efficiency, reduces internal resistance, optimizes breathable performance, and enhances durability.
Smart Images
Figure CN222777550U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of respirators, in particular to a respirator filter element with increased effective filtering area. Background Art
[0002] Respirators, as a professional personal protective equipment, play a vital role in modern life and work. They are mainly used to block particulate pollutants such as dust, smoke, and fog in the air, preventing these harmful substances from entering the human respiratory organs, thereby protecting the life safety of individuals. These particulate pollutants may come from multiple fields, including but not limited to industrial production, construction, agricultural activities, and medical environments.
[0003] The protective effect of the respirator mainly depends on its built-in filter elements. These filter elements are usually made of meltblown cloth materials, which have electrostatic adsorption properties and can effectively capture and fix tiny particle pollutants. However, over time, particles gradually accumulate on the filter elements, which will reduce their filtering effect. Therefore, they need to be replaced regularly to maintain their good protective performance.
[0004] The applicant has previously applied for a replaceable filter element for a respirator (patent application number: 2024206870040). The inner cavity of the filter element has two filter layers that are close together. The folded wave-like structure formed by multiple bends can effectively block particulate pollutants in the air and provide a good filtering effect. Under normal circumstances, the filter layer itself has a relatively thick thickness, but the outer rings of the two filter layers are pressed together by hot melting, which will cause the outer rings to fall over and be squeezed together. Figure 1 As shown in A of the figure, the gas flow of the folded wave-like structure of the outer circle is blocked, forming a circle of "ineffective filtering area" without gas flow, as shown in Figure 2 As shown in the B part of the figure, the remaining inner circle forms the "effective filtration area", as shown in Figure 2 As shown in the C part, the actual filtering effect is greatly reduced. On the one hand, the two filter layers are staggered at an angle to each other in order to enable smooth air circulation. However, due to the inversion and flattening of the outer circles of the two filter layers, the airflow between the two outer circles collides with each other to produce "turbulence", and the gas flow is disordered, thus forming internal resistance, which makes people feel that the air permeability is poor when worn.
[0005] In summary, the prior filter elements have the problems of large air resistance and poor air permeability, and also have the defect of reduced "effective filter area". The applicant has proposed a new technology for this purpose. Utility Model Content
[0006] The utility model aims to provide a respirator filter element with a large effective filtering area, a simple structure and comfortable ventilation.
[0007] To achieve the above-mentioned purpose, the solution of the utility model is: a respirator filter element with an increased effective filtering area, comprising two or more filter layers, one or more separators and joints, wherein two adjacent filter layers are separated by a separator to form an air circulation cavity, and the separator is sealed and connected to the filter layers on both sides, and the two adjacent filter layers and the separator therebetween enclose an air circulation cavity, wherein a through hole is provided on the outer side of the outermost filter layer, and a joint for connecting to the respirator is installed at the through hole.
[0008] Preferably, the edge of the separator forms a complete closed outer contour.
[0009] Preferably, the edge of the separator is the same size as the edges of the two adjacent filter layers and is fixedly sealed.
[0010] Preferably, the outer contour of the separator is circular, square, triangular, trapezoidal or irregular.
[0011] Preferably, the separator is made of plastic.
[0012] Preferably, each filter layer is a folded wave-like structure formed by multiple bends.
[0013] Preferably, each filter layer is made of meltblown cloth.
[0014] Preferably, adjacent filter layers are staggered with each other at an angle.
[0015] Preferably, the staggered angle between adjacent filter layers is 1° to 90°.
[0016] Preferably, the joint is coaxially arranged with the filter layer.
[0017] After adopting the above scheme, the gain effect of the utility model is:
[0018] The innovation of the present invention lies in the introduction of a separator design. This ingenious design allows the two filter layers to be clearly separated, ensuring that the two filter layers can be spread out, thereby effectively avoiding the area loss caused by the filter layers falling over and squeezing each other. This design maximizes the "effective filter area" and greatly improves the filtration efficiency. In contrast, when the two filter layers of the traditional filter element each have 10% of "ineffective filter area", the overall effective filter area can only reach 80%. The present invention almost achieves 100% of "effective filter area" through the introduction of the separator. Compared with the traditional design, the filter area is increased by 20%, and the filtration effect is significantly improved. At the same time, the separator not only optimizes the layout of the filter layer, but also ensures that the folded wavy structure can give full play to its advantages, making the filtration effect more outstanding. In addition, due to the design of the separator, "turbulence" is not easy to generate during the filtration process, the internal resistance is significantly reduced, and the air permeability is optimized, thereby improving the comfort of the wearer. It is worth mentioning that the separator also provides a certain rigid support for the entire filter element, enhances its durability, and is not easy to be damaged. In summary, the overall structure of the utility model is lighter and simpler, which reduces the production cost, making the utility model more cost-effective. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic cross-sectional structural diagram of a prior filter element;
[0020] Figure 2 is a schematic diagram of the overall structure of the prior filtering element;
[0021] Figure 3 This is a schematic diagram of the decomposed structure of the utility model with a separator and two filter layers;
[0022] Figure 4 This is a schematic diagram of the overall structure of the utility model with a separator and two filter layers (front view);
[0023] Figure 5 This is a schematic diagram of the overall structure of the utility model with a separator and two filter layers (reverse side);
[0024] Figure 6 It is a schematic cross-sectional structure diagram of the utility model with a separator and two filter layers;
[0025] Figure 7 This is a schematic diagram of the decomposed structure of the utility model with two partitions and three filter layers;
[0026] Figure 8 It is a schematic diagram of the overall structure of the utility model with two partitions and three filter layers.
[0027] Description of labels:
[0028] 1. Filter layer; 11. Through hole; 2. Separator; 21. Air flow cavity; 3. Connector. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0030] The utility model provides a respirator filter element with increased effective filtering area, such as Figures 3 to 5 As shown, it includes two or more filter layers 1, one or more separators 2 and a joint 3. Two adjacent filter layers 1 are separated by a separator 2, and the separator 2 is sealed and connected to the filter layers 1 on both sides. The two adjacent filter layers 1 and the separator 2 therebetween enclose an air flow cavity 21. In order to connect with the respirator, a through hole 11 is opened on the outside of the outermost filter layer 1, and a joint 3 for connecting with the respirator is installed at the through hole 11.
[0031] The number of filter layers 1 can be two, three, etc., and two filter layers 1 correspond to one separator 2, and three filter layers 1 correspond to two separators 2. Figure 7 and Figure 8 As shown, by analogy, the number of the separators 2 can be one, two, etc. according to the number of different filter layers 1. The benefits of such multi-layer stacking include but are not limited to improving the filtering effect of the filter element with the least material.
[0032] like Figure 3 As shown, the edge of the separator 2 forms a complete closed outer contour, which can be circular, square, triangular, trapezoidal or irregular, so as to form the overall shape of the filter element. The preferred embodiment takes a circular shape as an example. Figures 3 to 8As shown. The separator 2 also serves as a support between adjacent filter layers 1 and is the source of the rigidity of the entire filter element. Each filter layer 1 is a folded wavy structure formed by multiple bends. The air circulation cavity 21 formed in the middle of the separator 2 not only allows the folding distance of each folded wavy structure to circulate air smoothly, but also the space is large enough to allow the airflow to be inhaled and exhaled after a certain distance, thereby reducing resistance and increasing overall air permeability. The edge size of the separator 2 can be the same as the edge size of the adjacent filter layers 1 on both sides, including but not limited to hot melting to achieve fixed cover sealing, and can also be achieved by glue bonding. The separator 2 includes but is not limited to being made of plastic, preferably made of plastic, such as ABS, PP.
[0033] The folded wavy structure of the filter layer 1 of the utility model can increase the filtering area of the air flow cavity 21. According to pressure P = pressure F / area S, when F remains unchanged, increasing S can reduce the value of P. When the penetration resistance F remains unchanged, the folded part can increase the filtering area S through which the air passes by multiples by controlling the number of folds and the height of the folds, and can reduce the value of the pressure P, that is, reduce the breathing resistance, and increase the ventilation effect of the self-respirator by multiples. The material of the filter layer 1 of the utility model is not limited, and can be made of melt-blown cloth, which is light in weight and has good filtering effect, and is a better choice.
[0034] like Figure 3 and Figure 4 As shown, adjacent filter layers 1 can be staggered with each other at an angle ranging from 1° to 90°, preferably 90°, which can allow the gas to flow more fully and improve the filtering effect.
[0035] The position of the connector 3 on the filter layer 1 is not limited, and it can be eccentric or coaxial with the filter layer 1 .
[0036] The filter element of the utility model is made of light-weight materials and has a simple and neat structure, so that the filter element of the utility model is light and convenient to carry when worn together with the respirator.
[0037] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".
[0038] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "front", "rear", "inside", "outside", "upper", "lower", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the utility model.
[0039] The above description is only a preferred embodiment of the present utility model and is not a limitation on the design of the present case. Any equivalent changes made based on the key design of the present case shall fall within the protection scope of the present case.
Claims
1. A respirator filter element with increased effective filtration area, characterized in that: The invention comprises two or more filter layers (1), one or more separators (2) and a joint (3); two adjacent filter layers (1) are separated by a separator (2) to form an air circulation cavity (21); the separator (2) and the filter layers (1) on both sides are sealed and connected together; the two adjacent filter layers (1) and the separator (2) therebetween enclose the air circulation cavity (21); a through hole (11) is provided on the outer side of the outermost filter layer (1); a joint (3) for connecting to a respirator is installed at the through hole (11).
2. A respirator filter element with increased effective filtration area as claimed in claim 1, characterized in that: The edge of the separator (2) forms a complete closed outer contour.
3. A respirator filter element with increased effective filtration area as claimed in claim 2, characterized in that: The edge of the separator (2) has the same size as the edges of the two adjacent filter layers (1) and is fixedly sealed.
4. A respirator filter element with increased effective filtration area as claimed in claim 2, characterized in that: The outer contour of the separator (2) is circular, square, triangular, trapezoidal or irregular.
5. A respirator filter element with increased effective filtration area as claimed in claim 1, characterized in that: The separator (2) is made of plastic.
6. A respirator filter element with increased effective filtration area as claimed in claim 1, characterized in that: Each filter layer (1) is a folded wave-like structure formed by multiple bends.
7. A respirator filter element with increased effective filtration area as claimed in claim 1, characterized in that: Each filter layer (1) is made of melt-blown cloth.
8. A respirator filter element with increased effective filtration area as claimed in claim 1, characterized in that: Adjacent filter layers (1) are staggered with each other at an angle.
9. A respirator filter element with increased effective filtration area as claimed in claim 8, characterized in that: The staggered angle between adjacent filter layers (1) is 1° to 90°.
10. A respirator filter element with increased effective filtration area as claimed in claim 1, characterized in that: The joint (3) is coaxially arranged with the filter layer (1).