Humidification filter element and preparation method thereof

Abstract

The invention provides a humidifying filter element and a preparation method thereof.The humidifying filter element comprises a filter element body, the filter element body comprises a three-dimensional net-shaped warp knitting fabric, the radial edges of the two ends of the three-dimensional net-shaped warp knitting fabric are connected, and the weft edge of the three-dimensional net-shaped warp knitting fabric is shaped; the three-dimensional net-shaped warp knitting fabric is folded to form a double-layer structure, and the two weft-direction edges coincide after being folded and are fixedly connected. By shaping the weft edge, the lower end part of the filter element is not elongated and deformed; and the water in the filter element can be guided into the frame, gathers to the bottom of the frame and slowly flows to the lower water tank, so that continuous water dripping sound generated by direct water dripping is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of filter elements, and in particular to a humidifying filter element and a preparation method thereof. Background Art

[0002] The mainstream humidification methods on the market are ultrasonic atomization humidification and cold evaporation humidification. Among them, cold evaporation humidifiers achieve humidification by adsorbing water molecules to the surface of the material and then using a fan to blow them into the air. Cold evaporation humidification water molecules evaporate more delicately and do not require heating, so it does not consume electricity; in addition, since there is no heating process, it does not produce scale and odor; therefore, cold evaporation humidifiers are popular in the market.

[0003] Polyester material has good water absorption, and the absorbed water is easily taken away by flowing air, showing good humidification performance, so it is used in the filter element of humidifier. However, when using polyester to prepare filter elements, especially when preparing annular filter elements, because the polyester material has elasticity in the weft direction, when the filter element is produced by the prior art, after the filter element is finalized, due to the deformation of the weft direction of the polyester material, the length of the filter element structure size often changes in the design size, and it cannot be well adapted to the frame, resulting in a series of problems. Therefore, the filter element size caused by the expansion and contraction of the polyester material is difficult to fix and control, which limits the scope of use of polyester. Summary of the invention

[0004] The embodiment of the present application provides a humidification filter element and a preparation method thereof to solve the problems existing in the related technology. The technical solution is as follows:

[0005] In a first aspect, an embodiment of the present application provides a humidification filter element, including a filter element body, wherein the filter element body includes a three-dimensional mesh warp knitted fabric, wherein radial edges at both ends of the three-dimensional mesh warp knitted fabric are connected, and the weft edges of the three-dimensional mesh warp knitted fabric are shaped;

[0006] The three-dimensional mesh warp knitted fabric is folded in half to form a double-layer structure, and after being folded in half, the two weft edges overlap and are connected and fixed.

[0007] In one embodiment, the three-dimensional mesh warp knitted fabric has a surface layer, a three-dimensional layer and a bottom layer stacked in sequence along the thickness direction; the surface layer and the bottom layer are provided with evenly arranged air holes, the three-dimensional layer contains a plurality of silk threads perpendicular to the surface layer and the bottom layer, the plurality of the silk threads are evenly arranged, and the three-dimensional layer has through holes along the thickness direction.

[0008] In one embodiment, a circular rubber band is provided in the double-layer structure formed by folding, and the circular rubber band is connected and fixed to at least one weft edge.

[0009] In one embodiment, there is an envelope at the connection and fixation of the weft edges.

[0010] In one embodiment, the three-dimensional warp knitted fabric includes one or more of polyester yarn, nylon yarn, polypropylene yarn or cotton fiber yarn.

[0011] In one embodiment, the three-dimensional warp knitted fabric contains an antimicrobial preservative.

[0012] In one embodiment, the three-dimensional mesh warp knitted fabric has a thickness of 2-30 mm and a material weight of 50-800 g / m2.

[0013] In one embodiment, the shape of the air holes on the surface layer is the same as or different from the shape of the air holes on the bottom layer.

[0014] In one embodiment, the pore spacing of the air holes on the surface layer is the same as or different from the pore spacing of the air holes on the bottom layer.

[0015] In one embodiment, the filter element body includes multiple layers of the three-dimensional mesh warp knitted fabric, and multiple layers of the three-dimensional mesh warp knitted fabric are stacked.

[0016] In a second aspect, an embodiment of the present application provides a method for preparing a humidification filter element, comprising the following steps:

[0017] S1, cutting the three-dimensional warp knitted fabric into sheets, wherein the weft side is the weaving transverse side of the fabric and the radial side is the weaving radial side of the fabric;

[0018] S2, shaping the weft edge of the fabric;

[0019] S3, aligning and overlapping the two radial edges of the fabric, connecting and fixing them to form a joint;

[0020] S4, turning one of the weft edges of the fabric outward so that the two weft edges are aligned and the connecting head formed in step S3 is covered inside;

[0021] S5, connecting and fixing the two aligned latitudinal edges to obtain the humidification filter element.

[0022] In one embodiment, in step S2, the weft edge is shaped by a hot melt pressing method; the fibers of the fluffy three-dimensional material are thermally bonded, and the thickness of the weft edge becomes 20% of the original thickness.

[0023] In one embodiment, in step S3, the radial edges are connected and fixed by sewing, hot melt adhesive bonding, ultrasound or hot melt pressing.

[0024] In one embodiment, in step S5, the weft edges are connected and fixed by sewing, hot melt adhesive bonding, ultrasonic waves or hot melt pressing.

[0025] In one embodiment, after step S5, the method further includes the step of hemming the weft edge connection with a woven material.

[0026] In one embodiment, before the two aligned weft edges are connected and fixed in step S5, a circular rubber band is inserted between the two woven fabrics, and the rubber band is connected and fixed to at least one weft edge.

[0027] The advantages or beneficial effects of the above technical solution include at least:

[0028] The humidifying filter element of the present application is processed and fixed during preparation of the elastic weft edge of the material, and then sewn into a filter element. Because the elastic edge has been fixed, it will not expand or contract during preparation, so that the size of the prepared filter element is consistent with the design size and can be close to and fit the plastic component. After the filter element absorbs water, the water absorbed by the filter element can flow downward evenly. Because the filter element fits the plastic component closely, the water flowing down the filter element can fall along the plastic bracket into the bottom water tank of the machine, avoiding the water in the filter element falling directly and hitting the machine to make a dripping sound.

[0029] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0031] Figure 1 It is a cross-sectional view of a humidifying filter element in which an existing filter element body and a frame are combined;

[0032] Figure 2 This is a cross-sectional view of a humidifying filter element in which a filter element body and a frame are combined according to another embodiment of the present application;

[0033] Figure 3 A structural diagram of a three-dimensional mesh woven fabric used in this application;

[0034] Figure 4 This is a three-dimensional diagram of a filter element body according to an embodiment of the present application;

[0035] Figure 5 A three-dimensional diagram of a filter element body according to another embodiment of the present application;

[0036] Figure 6This is the effect diagram of the connection of the latitudinal edges of the filter element without edge wrapping for this application;

[0037] Figure 7 This is the effect diagram of the filter element for this application. DETAILED DESCRIPTION

[0038] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0039] In the prior art, the humidification filter element of the cold evaporative humidification device is generally made of polyester material, which has good water absorption and is easily carried away by the air during air flow, thus showing good humidification performance. However, the polyester material has elasticity in the weft direction. After the polyester material is shaped, the weft direction will become longer due to the elasticity of the material, and the fixed size cannot be controlled, so it cannot be well adapted to the frame. Figure 1 As shown, this causes the water in the filter element to flow downward. When it flows to the latitudinal edge, due to the mismatch between the latitudinal edge and the frame, the water does not gather on the frame, but drips directly, producing a loud water dripping sound.

[0040] To overcome this problem, Figure 2 As shown, an embodiment of the present application provides a humidification filter element of a cold evaporative humidification device, including a filter element body 1, wherein the filter element body 1 includes a three-dimensional mesh structure woven fabric 101, radial edges 102 at both ends of the three-dimensional mesh structure woven fabric 101 are connected, and the weft edges 103 of the three-dimensional mesh structure woven fabric 101 are shaped; the three-dimensional mesh warp knitted fabric 101 is folded in half to form a double-layer structure, and after folding in half, the two weft edges 103 overlap and are connected and fixed.

[0041] The radial edge and the weft edge are based on the longitudinal and transverse directions of the three-dimensional mesh structure woven fabric. Figure 3As shown, the three-dimensional mesh structure woven fabric 101 is a three-layer structure, including a surface layer, a three-dimensional layer, and a bottom layer, forming a cube. The weft edge is the weft edge in the horizontal direction of the fabric weaving, and the radial edge is the radial edge in the radial direction of the fabric weaving. The two radial edges 102 are the edges on the two faces in the radial direction at both ends of the cube in the weft direction; the weft edge 103 is the edge on the two faces in the weft direction at both ends of the cube in the radial direction. The surface layer and the bottom layer are evenly arranged with air holes, and the middle three-dimensional layer is composed of a plurality of silk threads that are evenly arranged perpendicular to the surface layer and the bottom layer to form a hole structure, and the hole structure is a through hole along the thickness direction. The hole structure is the same as or different from the shape of the air holes on the surface layer and the bottom layer, for example, it is not limited to the surface layer being a rhombus and the bottom layer being a circle / triangle. The hole structure and the size of the air holes can be the same or different. For example, it is not limited to the air hole spacing in the surface layer being 3mm and the air hole spacing in the bottom layer being 5mm. The surface layer, the three-dimensional layer, and the bottom layer form a three-dimensional structure with air permeability.

[0042] When the two radial edges 102 are connected, the three-dimensional mesh structure braid 101 forms a toroidal cylinder; the weft edges 103 form two toroidal surfaces of the toroidal cylinder. In the present application, the weft edges 103 of the three-dimensional mesh structure braid 101 are shaped by hot melt pressing; the fibers of the fluffy three-dimensional material are thermally bonded, and the thickness of the weft edges is reduced by 80% to 20% of the original. Therefore, in the process of connecting the radial edges 102, the weft edges 103 will not produce telescopic deformation because they have been shaped, so the length of the weft edges 103 will be fixed and will not change. After selecting the three-dimensional mesh structure braid 101 of appropriate size according to the size of the filter element, the weft edges 103 of the prepared filter element body 1, that is, the diameter of the toroidal cylinder will be the same as the designed diameter, no elongation deformation will occur, and it can also be adapted to the plastic frame.

[0043] The total thickness of the surface layer and the bottom layer of the three-dimensional mesh structure braided fabric 101, that is, the middle three-dimensional layer, is 2-30mm; under this thickness, it can be ensured that the filter element body 1 will not be seriously deformed under the set wind speed, and there is enough water to flow and moisten, and the wind blows the filter element body 1 to generate sufficient water vapor. The material of the three-dimensional mesh structure braided fabric 101 is one or a combination of two or more of polyester, nylon, polypropylene, and cotton fibers. The gram weight of the three-dimensional mesh structure braided fabric 101 is 50-800g / square meter; the materials of polyester, nylon, polypropylene, and cotton fibers have good water absorption, and are easily carried away by the air during air flow, so they show good humidification performance.

[0044] The three-dimensional mesh warp knitted fabric 101 is folded in half to form a double-layer structure, and the two weft edges 103 overlap and are connected and fixed after being folded in half. It has a first folded portion 104 and a second folded portion 105 formed by folding the two weft edges 103 in half and overlapping and fixing them to each other. In this embodiment, the three-dimensional mesh structure woven fabric 101 is connected by radial edges 102 to form a circular cylinder, and the circular cylinder is turned outward by turning one of the weft edges 103, that is, the circular cylinder can be folded in half from the middle, and the first folded portion 104 formed by the folding becomes one end of the filter element body 1; after being folded in half, the weft edges 103 at both ends of the circular cylinder overlap and are fixed to each other to form a second folded portion 105, which serves as the other end of the filter element body 1; therefore, the filter element body 1 is a double-layer structure folded in half.

[0045] like Figure 4 As shown, when the radial edges 102 at both ends of the three-dimensional mesh structure braid 101 are connected, the two radial edges 102 are connected by sewing to form a suture line. In the present application, the two radial edges forming the inner circle of the ring are sewn, and the suture line exists inside the filter element body 1. The two radial edges 102 on the outer circle form an outward opening along the suture line, and the two ends of the suture line are connectors 107; when the circular cylinder turns one of the latitudinal edges 103 outward and folds the circular cylinder in half from the middle, the two radial edges 102 and the outward opening formed are completely hidden inside the filter element body 1, and the outer surface of the filter element body 1 is more regular.

[0046] like Figure 5 and Figure 6 As shown, the latitudinal edge 103 is connected and fixed to form a lock line 106, and the structure after the upper and lower connectors 107 are locked and fixed by the lock line 106 is shown in the partial enlarged view. When the filter element body 1 is in use, one end of the lock line 106 faces downward, and because the latitudinal edge 103 is sutured or hot-melt pressed to shape, and is fixed by the lock line 106, the length of the latitudinal edge 103 is still not elongated, and is consistent with the initial design length, so it can still be adapted to the frame 2, and the water gathered downward can be gathered along the filter element body 1 to the edge of the latitudinal edge 103 at the end of the latitudinal edge 103 and contact the frame 2, and then flow into the water tank in the frame 2, avoiding the undesirable phenomenon of water dripping sound in the machine.

[0047] Furthermore, if Figure 7 As shown, after the two weft edges 103 are connected and fixed, a woven material is used to wrap the connection to form an envelope, covering and encapsulating the lock line 106 formed by the two weft edges 103 combined and fixed. On the one hand, the weft end of the humidification filter element is further limited to limit the outward expansion deformation of the weft edge 103 in this direction; at the same time, the connection of the three-dimensional mesh braid 101 is also concealed to cover the uneven appearance of the fluff on the surface of the three-dimensional mesh braid 101 caused by cutting.

[0048] As one embodiment, the filter element body 1 includes multiple layers of three-dimensional warp knitted mesh fabrics 101. The multiple layers of overlapping three-dimensional warp knitted mesh fabrics 101 are made into the filter element body 1 using the same process.

[0049] As one embodiment, the three-dimensional warp knitted fabric 101 contains an antibacterial preservative. Adding a certain amount of antibacterial and antifungal agent inside the fabric can have an antibacterial and antifungal effect.

[0050] In one embodiment of the present application, a method for preparing a humidification filter element of the present application comprises the following steps:

[0051] S1, cutting the three-dimensional warp knitted fabric into sheets, wherein the weft side is the weaving transverse side of the fabric and the radial side is the weaving radial side of the fabric;

[0052] S2, shaping the weft edge of the fabric;

[0053] S3, aligning and overlapping the two radial edges of the fabric, connecting and fixing them to form a joint;

[0054] S4, turning one of the weft edges of the fabric outward so that the two weft edges are aligned and the connecting head formed in step S3 is covered inside;

[0055] S5, connecting and fixing the two aligned latitudinal edges to obtain the humidification filter element.

[0056] In the preparation method of the present application, for the three-dimensional mesh warp knitted fabric whose ends are prone to curling or stretching deformation, the weft edge is shaped before preparing the filter element, so that after the filter element is prepared, the size of one end of the weft edge of the filter element will not change, so that it can fit tightly against the internal bracket of the humidifier, and the water flows down from the upper part of the filter element, and can be concentrated at the bottom of the bracket and slowly flow to the sink to avoid the sound of water dripping; and the lower end of the filter element fits tightly against the bracket, and the airflow escape does not occur, so that the airflow can fully pass through the body of the humidification filter element, thereby improving the humidification amount.

[0057] As one embodiment, in step S2, the weft edge is shaped by hot melt pressing; the fibers of the fluffy three-dimensional material are thermally bonded, and the thickness of the weft edge becomes 20% of the original. Through pressing and shaping, the fibers of the fluffy three-dimensional material are thermally bonded, and their ability to stretch and deform becomes worse after cooling. The thickness of the weft edge is compressed by 80% to 20% of the original thickness, and at this thickness, the two weft edges are connected and fixed. That is, one end of the weft edge can no longer be stretched and deformed, meeting the requirements.

[0058] As one embodiment, in step S3, the radial edges are connected and fixed by sewing, hot melt adhesive bonding, ultrasonic or hot melt pressing;

[0059] As one embodiment, in step S5, the weft edges are connected and fixed by sewing, hot melt adhesive bonding, ultrasonic or hot melt pressing.

[0060] As one embodiment, after step S5, the method further includes the step of hemming the weft edge connection with a woven material.

[0061] As one implementation method, before the two aligned weft edges are connected and fixed in step S5, a circular rubber band is inserted between the two woven fabrics, and the rubber band is connected and fixed to at least one weft edge.

[0062] Specific examples are not limited to:

[0063] Example 1

[0064] like Figure 2 As shown, a three-dimensional mesh warp knitted fabric is selected. The material is polyester, warp knitted, the surface layer and the bottom layer are evenly distributed with air holes, the thickness is 7mm, and the weight is 500g / m 2 ; Cut the fabric into mesh sheets, with a weft edge of 600mm and a radial edge of 250mm; Use ultrasonic technology to press and shape the weft edges, and the size after shaping is 600mm; Align the radial edges and sew them together, then turn the material inside out and cover the opening formed by the radial edges inside; Sew the aligned weft edges together, and the measured inner circumference of the connection is 580-600mm; Assemble it into a plastic frame, and the bottom of the filter element body fits well with the plastic frame; Install it into the corresponding humidifier, turn on the humidifier, and according to the standard test, the humidification capacity is 700mL / h, and there is no dripping sound during the humidification process.

[0065] Comparative Example 1

[0066] like Figure 1 As shown, a three-dimensional mesh warp knitted fabric is selected. The material is polyester, warp knitted, the surface layer and the bottom layer are evenly distributed with air holes, the thickness is 7mm, and the weight is 500g / m 2 ; Cut the fabric into mesh sheets with a weft edge of 600mm and a radial edge of 250mm. Align the radial edges and sew them together. Then turn the material inside out and connect the radial edge connectors inside. Sew the aligned weft edges together. The measured inner circumference of the connection is 680-720mm. Assemble it into a plastic bracket with a gap between the bottom of the filter element and the plastic bracket. Install it into the corresponding humidifier and turn on the humidifier. According to the standard test, the humidification capacity is 500mL / h and there is a sound of water drops during the humidification process.

[0067] It can be seen from Example 1 and Comparative Example 1 that when a three-dimensional mesh warp knitted fabric of the same specification and size is used to make a filter element, if the weft side is not characterized, as shown in Comparative Example 1, the measured inner circumference of the connection is 680-720 mm, while after shaping as in Example 1, the measured inner circumference of the connection is 580-600 mm, and the weft side length of the initial material is only 600 mm. This indicates that the present application shapes the weft side before preparing the filter element, and the final size of the conscientiousness is not elongated and enlarged. Due to shaping and connection and fixation, the size shrinks instead, and can better fit the frame.

[0068] In Comparative Example 1, the initial latitudinal side length is 600mm, and the circumference becomes 680-720mm after being prepared into a filter element, indicating that the latitudinal side is obviously deformed due to elasticity and curling during the preparation of the filter element. This results in the filter element prepared not being able to fit well with the frame. Therefore, the humidification capacity of the filter element of Comparative Document 1 is only 500mL / h, which is much less than 700mL / h of Example 1. This is because the filter element of Comparative Example 1 cannot fit with the frame, and the airflow overflows from the gap between the filter element and the frame, and cannot play a humidification role. And because the lower end of the filter element is deformed, the water on the filter element drips directly and hits the bracket or the basin, making a loud sound of water drops.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0071] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A humidifying filter element, It is characterized in that The filter element comprises a filter element body, wherein the filter element body comprises a three-dimensional mesh warp knitted fabric, the radial edges of the two ends of the three-dimensional mesh warp knitted fabric are connected, and the weft edges of the three-dimensional mesh warp knitted fabric are shaped; The three-dimensional mesh warp knitted fabric is folded in half to form a double-layer structure, and after being folded in half, the two weft edges overlap and are connected and fixed.

2. A humidifying filter element according to claim 1, It is characterized in that The three-dimensional mesh warp knitted fabric comprises a surface layer, a three-dimensional layer and a bottom layer which are stacked in sequence along the thickness direction; the surface layer and the bottom layer are provided with evenly arranged air holes, the three-dimensional layer comprises a plurality of silk threads which are perpendicular to the surface layer and the bottom layer, the plurality of silk threads are evenly arranged, and the three-dimensional layer has through holes along the thickness direction.

3. A humidifying filter element according to claim 3, It is characterized in that The double-layer structure is folded in half to form a circular rubber band, and the circular rubber band is connected and fixed to at least one weft edge; There is an envelope at the connection and fixing locations of the weft edges.

4. A humidifying filter element according to claim 1, It is characterized in that The three-dimensional mesh warp knitted fabric includes one or more of polyester yarn, nylon yarn, polypropylene yarn or cotton fiber yarn; The three-dimensional mesh warp knitted fabric contains antibacterial preservatives.

5. A humidifying filter element according to claim 1, It is characterized in that The three-dimensional mesh warp knitted fabric has a thickness of 2-30 mm and a material weight of 50-800 g / m2; The shape of the air holes on the surface layer is the same as or different from that of the air holes on the bottom layer; the air hole spacing of the air holes on the surface layer is the same as or different from that of the air hole spacing of the air holes on the bottom layer.

6. A humidifying filter element according to any one of claims 1 to 5, It is characterized in that The filter element body comprises multiple layers of the three-dimensional mesh warp knitted fabric, and the multiple layers of the three-dimensional mesh warp knitted fabric are stacked.

7. A method for preparing a humidifying filter element, It is characterized in that The following steps are involved: S1, cutting the three-dimensional warp knitted fabric into sheets, wherein the weft side is the weaving transverse side of the fabric and the radial side is the weaving radial side of the fabric; S2, shaping the weft edge of the fabric; S3, aligning and overlapping the two radial edges of the fabric, connecting and fixing them to form a joint; S4, turning one of the weft edges of the fabric outward so that the two weft edges are aligned and the connecting head formed in step S3 is covered inside; S5, connecting and fixing the two aligned latitudinal edges to obtain the humidification filter element.

8. The method for preparing a humidifying filter element according to claim 1, It is characterized in that In step S2, the weft edge is shaped by hot melt pressing; the fibers of the fluffy three-dimensional material are thermally bonded, and the thickness of the weft edge becomes 20% of the original thickness; In step S3, the radial edges are connected and fixed by sewing, hot melt adhesive bonding, ultrasonic or hot melt pressing; In step S5, the weft edges are connected and fixed by sewing, hot melt adhesive bonding, ultrasonic wave or hot melt pressing.

9. The method for preparing a humidifying filter element according to claim 1, It is characterized in that After step S5, the method further includes the step of using a woven material to hem the connection of the weft edges.

10. The method for preparing a humidifying filter element according to claim 1, It is characterized in that Step S5: Before connecting and fixing the two aligned weft edges, a circular rubber band is inserted between the two woven fabrics, and the rubber band is connected and fixed to at least one weft edge.

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