TW541197B - Filtration device with staged pleating - Google Patents

Abstract

An enhanced flow ratio is achieved with a novel staged pleating arrangement whereby a variable pleat height ratio and number of pleats determines the respective staging configuration which is used for each desired application of the instant teachings. Relative to known pleat geometries, a higher flow rate is achieved according to the teachings of the present invention.

Description

541197 B7 V. Description of the Invention (Background of the Invention) -------- I I I I I --- (Please read the notes on the back before filling out this page) The present invention relates to a filtering device and its related components. In particular, the present invention relates to a layered folding device for a filter and a device to which it is specifically applied. Similarly, in accordance with the principles of the present invention, by changing the technology with the largest area weight, height, and location, it can achieve the maximum filtering effect per unit area to produce the desired flow rate. The most significant problem in conventional folding systems for filtering is that once a high flow rate is generated, it will affect the structural integrity of the relevant filtering unit. Many attempts at conventional techniques have pointed out that the existing pleated geometry needs further modification. So far, based on the use of stepped pleats to increase the filtration area and to improve the flow rate and flow operation life, applications that have better retention effects while maintaining higher flow rates have not been developed. In order to fully understand the technical characteristics of the present invention, it is necessary to conduct a detailed study of this technology in the absence of related literature in the known arts. However, none of the references, patent documents, or other disclosed facts raise related questions about the principle as much as the present invention. For example, if the flow rate increases, the structural problems that accompany it will arise in each of the situations discussed in this invention. Cylindrical filter elements with longitudinal pleats extending radially are one of the most common types of plenum elements used to filter various fluids (i.e. liquids and gases). As used in this manual, filters, filters, and filtration effects include those that exclude particles such as by sieving or trapping through a porous material, and such mechanisms as ion exchange resins, adsorbents, and the like To eliminate impurities. -This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm) 541197 A7 _____B7_______ V. Description of the invention (/) -------------- Packing --- (Please (Read the notes on the back before filling out this page.) In a typical cylindrical pleated filter element, several pleats are arranged around a tubular core to define a cylinder. When viewed from a cross section, individual pleats of this filter element extend radially outward from the nucleus to the outer periphery of the filter element. Basically, any such area or space of the nucleus must always remain constant. In conventional applications, it has sufficient folds in a cylindrical filter element and makes adjacent folds contact each other along the periphery of the core. However, because this pleated system has a radiant geometry, as the distance from the center of the nucleus increases, the interval between adjacent pleats must also increase. Therefore, in a typical conventional cylindrical pleated filter element, there is considerable unused space between adjacent pleats. Similarly, in the principle of known action, few people understand the relationship between the pleating heights. Therefore, from the viewpoint of differential pressure, the use of too many pleats usually results in the area of a region that is folded over each other. In fact, the surface area for the filtering effect is lost. The line is the same. Manufacture a larger filter element to compensate The unused space between adjacent folds is generally not possible due to the constraints of application specifications. Because, in today's filter industry, the dimensions of filter housings used to surround filter elements have become quite standardized. A major challenge for today ’s transition design is to increase the amount of filtration of the transition element (that is, the available surface area) without changing its external dimensions, so that the idea is to use existing filter housings, Or modify for specific applications and intended uses. Another attempt to solve the unsuccessful commercialization strategy 4 This paper size applies the Chinese National Standard (CNS) A4 (210 X 297 mm) 541197 A7 ___B7 _ V. Description of the invention (j) --- -I --- I ----- · II (please read the precautions on the back before filling this page), it is a pleated using pre-coated filter. The type of pre-coated filter uses a cake-like slurry called a fabric layer, and this slurry is coated on the outer surface of a non-pleated porous support structure (interlayer). After the fabric layer is applied to the partition layer, the fluid to be filtered is directed to flow through the fabric layer and the partition layer. At this time, the fabric layer can filter the fluid. The filtering element's measures are not intended to support the compartment, because the measures tend to fold when the fabric layer is applied or when fluid flows through the fabric layer. In the same way, to solve the long-standing problem proposed by the present invention by this method, the effect will be reduced under the influence of many other disadvantages. However, the present invention 尙 fails to overcome the problems caused by the fabric layer system.

Conventional mesh materials and filters (net products) come in various forms. For example, in high-temperature applications, metal mesh materials or filters can be used, while in lower temperature conditions, conventional polymer materials are used. • The form of the mesh material of the polymer can take a woven mesh structure and a protruding mesh structure. Any type of mesh material can be used according to conventional filters; however, protruding mesh structures are more common because they are smoother and therefore less likely to cause wear on the adjacent layers of the synthetic filter In the case of the protruding structure, the mesh material may have a first group of parallel fibers and a second group of parallel fibers staggered at an angle to the first group of fibers. The protruding network structure is also classified as symmetrical or asymmetrical. In the symmetrical network structure, 'the fibers of the first or second group are not stretched along the so-called' processing direction 'of the network structure, but appear from a network structure manufacturing machine. In an asymmetric network structure, one group of fibers is parallel to the machine. 5 ^^^ Chinese National Standard (CNS) A4 specification (210 X 297 mm) One 541197 A7 _ B7 _ V. Description of the invention (If ) ----------------- (Please read the notes on the back before filling in this page). In conventional techniques, both symmetrical and asymmetrical mesh structures are used. The asymmetric mesh structure has lower edge-to-edge flow resistance per unit thickness than the symmetrical structure. The characteristics of the mesh structure in conventional filtration can be expressed by its thickness and the number of fibers per inch. These dimensions are not limited to any particular number, but can be selected based on the desired characteristics of the edge flow and the desired strength of the mesh structure. Basically, the mesh structure will have a mesh number of at least 10 fibers per inch. This situation is to balance the flow rate with other constraints. Therefore, the fibers of the filtering mesh structure of each leg of the pleating are pressed against the fibers of the mesh structure adjacent to the leg of the fold. If the fibers of the reticular structure on the two opposite surfaces are parallel to each other, the fibers have a tendency of > nested maggots; that is, they are arranged alternately instead of being arranged on top of each other. This situation will reduce the filtering performance of the mesh structure and reduce its ability to filter media. This compression effect will reduce the surface area and filtering effectiveness. In an asymmetric mesh structure, it must be noted that 'the machine direction fibers are located on the side of the mesh structure facing the filter medium' and not on the side away from the filter medium, so that the fibers can be prevented. Nesting situation. However, in a symmetrical network structure, it is not important which side of the network structure faces the filter medium because there are no machine-direction fibers. Whether the network structure is symmetrical, asymmetrical, or asymmetrical Form 'If the network structure is placed or configured in a conventional way, its fibers can be avoided. 6_____ _________---------- This paper size applies to Chinese National Standard (CNS) A4 Specifications (210 X 297 mm) 541197 A7 ______B7____ 5. Description of the invention (f) (Please read the precautions on the back before filling this page). Assume that the first group of fibers is disposed on the side of a mesh structure facing the filter medium, and the second group of fibers is separated from the filter medium by the first group of fibers. In the pressed state, the second group of fibers can avoid nesting if the second group of fibers extends along a line that intercepts the longitudinal axis of the filter element at an angle between 0 ° and 90 °. Situation. If the second group of fibers is extended along a line intercepting the longitudinal axis of the filter element at an angle of 0 ° or 90 °, that is, if the second group of fibers is parallel or perpendicular to the axis of the filter element , The second group of fibers may have a nesting phenomenon. However, at any angle between these two limits, the second group of fibers will be placed on top of each other without nesting. Regarding the facts disclosed in this regard, according to conventional techniques, it can be found that in trying many protruding network structures of appropriate polymers, examples of its application include Malle Plastics (Texas, Austin) with Maltex, Zicot, Ultraflo and other products with product names. Similarly, in the conventional art, when the filtering medium is a medium on which fibers are laid, the net is used as a filtering layer. On the other hand, when the filter medium is a membrane, a woven or non-woven texture is usually used as the filter layer, because the texture is generally smoother than the net structure and adjacent to the synthetic filter. Less wear occurs between the layers. In the known case, the non-woven texture that can be used as a filter layer is a non-woven form of polymer, which is sold by Reemay under the brand name of Reemay 2011. Obviously, the filter type, the interlayer and the porosity change have a wide range of application. 7 This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 541197 A7 ____B7 __ r 5. Description of the invention ((^) Therefore, in general, for the same internal and external diameter 'filter elements are Designed to have a larger surface area available for filtering effects than conventional pleated filter elements. For example, in a conventional filter element with longitudinal pleats, its' total surface area A is calculated by the following formula 'A: 2hNL (0 where: h is the height of the pleats; N is the number of pleats in the filter element; and L is the length of the pleats measured along the axis of the filter element. In a pleated filter element, adjacent pleats are in contact with each other along the inside diameter of the filter element; therefore, the number of pleats is roughly calculated by the following formula: N = 4d ^ 2t) (2)

It where: t is the thickness of the synthetic structure (filter medium + filter layer + other layers). In another conventional technique that does not have a conventional filter element under compression pleats, the height of the pleats is obtained by the following formula: h = (3) 2 where: D is the outside diameter of the filter element; and d is the inside diameter of the filter element. What is important, however, is that with this conventional system, the problem of differential pressure or the clamping, pinching, or compression effects of many filter elements will prevent the desired flow rate from being achieved, and in fact may result in different designs. The increased surface area obtained does not achieve the desired effect. Similarly, according to these public 8 ________--This paper size applies Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page), τ · line 541197 A7 B7 5 2. Description of the Invention Devices such as those marketed and sold by the Pall Corporation in New York have very limited commercial success. Conversely, in a filter element with suppressed pleats, its pleats The opposite surface of the adjacent foot of the ridge is roughly in close contact with the height of the entire pleats, and the maximum fold height it can reach is approximately (4) obtained by the following formula:, D2-d2】 Magnet ψ + 2 /) In an actual filter with a covered pleat, the height of the pleat will be smaller than the maximum pleat height hmax 値, for one of the reasons it is very difficult for the pleat to have a perfect knife edge of. However, preferably, the exact pleat height should be at least 80% of hmax, and more preferably 90% of hmax, so that the volume between the inside and outside diameters of the filter element can be optimized. Use. For a filter element with a length L of 10 inches, a composite width t of 0.175 inches, an inside diameter of 1.2 inches, and an outside diameter of 2.75 inches, the number of pleats N can be calculated by formula (2) And we get the following γ (1 · 2 + 0.35): 13 (please read the precautions on the back before filling out this page) 0.35 As for the folding height of this conventional instrument, as well as the filtering used in accordance with the present invention The maximum measure of the filter can be obtained by formulas (3) and (4), Α (traditional filter) Amax (covered pleats) (2.75-1.2): 0.775 inches. 752 -1 · 22 ^^ Γ1 · 339 inches By inserting the calculated number into the formula (1), the following paper size can be obtained: The Chinese paper standard (CNS) A4 (210 X 297 mm) ) 541197 A7 ____B7_ 5. The surface area of column (P) of the invention description, where Aniax is the largest possible surface area corresponding to the h max: a traditional filter) = 2 x 0.775 X13 X10 = 201 · 5 square inches 4liax (suppressed wrinkle) = 2 χ 丨 · 239 χ 13 χ 10 = 322 · 14 square inches Therefore, in this case 'the basis is The first cover of a conventional valiant pleat filter may be the largest surface area, than the system includes a conventional pleated valiant same inside and outside diameter is too large of about Lu 6〇% of the surface area of the filter. Even if the actual height of the covered pleats is only 80% of the maximum shelter height h max, the exact filter surface area will be 322.4x0.8 = 257.71 square inches, and its height will be 28% more . Therefore, the increased surface area of such a conventional filter element having a pressed pleat according to the second conventional thickener is compared with the first conventional filter having the same inside and outside diameters. Below this will increase the effective life of the filter element. Furthermore, having pleats in a compressed state can cause the pleats to be evenly supported and to distribute the concentrated load evenly throughout the filter element. This situation minimizes the activity of the pleats and enhances the ability of the pleats to hold particles in a pulsating flow system. In addition, when the pleats are in a compressed state, the end surface of the filter element becomes extremely dense and will provide excessive resistance during the installation of the end cover over the filter element, which will damage it The filter element. Similarly, if a pleated filter element has upstream and downstream supports and a filter layer, the pressure drop ΔP across the filter element is as shown in the following formula: 10 t paper size applies the Chinese national standard ^ CNS) A4 specification (210 χ 297 公 f ---- I --------- · II (Please read the precautions on the back before filling this page) Order-

541197 A7 V. Description of the invention (° [) AP = (Ksh + Km / 2hXMQ / Nt) (5) Among them, // = Absolute viscosity of the fluid to be filtered; (Please read the note on the back? Matters before filling in this (Page) Q = Volume Flow Rate of Fluid =

Ks = flow resistance factor along the edges of the support and filter material;

Km = flow resistance factor of filter media; h = fold height 1 = pleated height in the axial direction of the filter; N = number of pleats; and t = thickness if, except for the height of the pleats h , All factors in formula (5) are constant, then when the pleat height h is expressed by the following formula, the pressure drop ΔP obtained by it is the minimum 値; where the formula of the pleat height h is as follows: h = (Km / 2Ks) V2 (6) Therefore, if the outside diameter of the filter element can be arbitrarily selected, the pressure drop ΔP across the conventional filter according to the second disclosure can be minimized, and the efficiency of the filter is also reduced. The maximum effect can be achieved by selecting the outer diameter, so that the pleat height h conforms to formula (6) ° The mechanism different from the frame cover can also keep the pleat in a covered state. In the case of water, chemicals, and solvents, the filter housing usually has a vent nozzle (air vent nozzle) to release the area of the filter housing that contains unfiltered liquid (hereinafter referred to as Is the gas in the upstream region), so that the space in the upstream region is filled with liquid. A cassette type filter assembly includes a filter element and a housing. Among them, the filter element is a cylindrical shape, usually a circular cylinder; the 11 paper sizes are applicable to China National Standard (CNS) A4 (210 X 297 mm) 541197 A7 ____ B7 ____ 5. Description of the invention (/ C)

The L housing contains the filter element and contains a ventilation nozzle. This structure is important to ensure the shape of an inner core and its periphery. ----------------- (Please read the precautions on the back before filling out this page) Conventionally, you want to minimize the size of the filter combination for a specific filtering surface area and It is still difficult to ensure its reliability. This problem was not solved until the present invention was presented. For example, in the conventional capsule-type filtering combination, the internal pressure of the filter housing is only applied completely to the wall portion of the housing. Therefore, it is necessary to thicken the wall portion of the casing to strengthen the tightness of the pressure, especially when the capsule-type filter combination is applied in the case of high-pressure filtration. The thickening of the wall portion results in an increase in the weight and / or size of the capsule type filter assembly. In many cases, system and / or heavy capsule type filter combinations are not suitable for use. The filter layer constituting a filter element can also be manufactured as a composite filter layer by a conventional or conventional pleated-shaped filter manufacturing technique. However, differential pressure and structural integrity remain long-standing issues. In the conventional art, in order to ensure a sufficient filtering effect in a filter element having closely spaced pleats, it is necessary to form an irregular structure such as a large surface of a groove on the surface of the pleats to generate a filtering channel. . These grooves, which can be formed by, for example, embossing technology, can significantly reduce the volume of a filter element, and are therefore suitable for the filtering effect of the present invention. The filter layer can provide a sufficient filtering effect even in the case of close contact with each other, so the irregular structure of the large surface in the pleating is unnecessary. Therefore, each layer ' of the filter element forming a composite filter is designed to have a substantially flat surface. 12 This paper size applies to China National Standard (CNS) A4 specification (210 X 297 male f) 541197 A7 ______ B7___ V. Description of the invention (II) -------------- ^ --- ( (Please read the notes on the back before filling this page)) Similarly, if there is a smooth radius on the protrusion of the pleats relative to the outside of a sharp fold, it also attempts to cover the pleats of the filter element. A conventional method of producing a smooth radius involves placing a layer of a treatable paper material called a strip-out paper on the downstream side of the wave-like filter composite during the manufacture of wrinkles. The strip-out paper will become completely pleated and produce a desired smooth radius. The stdp-mit paper will be peeled from the composite when the wrinkle effect is completed and before the composite is formed into a cylinder. The material for stdp_out paper is not the most important part, and one characteristic of this material is smooth paper. The thickness of the strip-out paper can be selected based on the bending radius of the wrinkled composite body, taking into account the thickness of the other layers of the composite body. Another conventional technique for manufacturing conventional filter elements allows the adjacent legs of the pleats formed to have different lengths. For many filter elements, especially those formed by a multilayer composite, it is generally believed that if the adjacent feet of each fold have a slightly different length, the filter element in its covering state is made. More reliable. Such pleats are called pleats with unequal feet. Taking this pleating as an example, each filter layer can contain a polypropylene protruding network structure. The filter medium can use a texture material containing aromatic polyamide fibers. This material can be a product sold by DuPont de Nemours E.I. under the trade name K〇vlar; other similar knowledge The material is fine-fibrous, and it is bonded to the base material of cellulose or non-woven polymer that forms the downstream side of the medium by resin. 13 dimensions are applicable to Chinese national standards (CNS> A4 regulations ^ TiTo x 297 public Chu) — '541197 A7 -------- B7__ 5. Description of the invention (/ l). The pore size of the conventional filter element used for filtering media must be sufficiently small so as to be able to capture almost all the particles in the material of the fabric layer, so that any fine particles in the material of the fabric layer passing through the interlayer can be passed Captured by this filtering medium. The pore size of this filter medium can also be small enough to capture other subtle substances in the fluid to be filtered ', and this subtle substance refers to the size that cannot be listed by other layers. Other conventional barrier materials are braided mesh structures using a stainless steel corrosion resistant metal. Among other known weaves, 尙 includes a square weave and a Dutch twill weave. Among them, the square weave is better 'because it is lighter in texture and easier to handle. In other cases, the barrier can be a polymer network or a non-woven polymer construction. In terms of polishing nuclear condensate, for example, a better material for the interlayer can be a square braided stainless steel mesh of 120 \ 180 > < 0.004 (inch) > < 0.0035 (inch) structure. This conventional barrier can be applied to the filter element in any manner such that all fluid flowing inward through the filter element must pass through the barrier first. In this case, the partition is leaning against the filter element and more preferably is in direct contact with the filter element. Furthermore, having a pleated state of compression can cause the pleats to be uniformly supported and promote a uniform distribution of the concentrated load across the entire filter element. This situation minimizes the activity of the pleats and enhances the ability of the pleats to hold particles in a pulsating flow system. In addition, when the pleats are in a pressed state, the end surface of the filter element will become extremely dense. 14 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) ( (Please read the notes on the back before filling out this page)

541197 A7 __B7___ V. Description of the invention And during the installation of the end cover above the filter element, an excessive resistance is provided to damage the filter element. Porous and pleated electrode structures are also known for carrying out measures' to provide the desired height, rigidity, and good dimensional stability during charging and discharging or temperature cycling. Basically, the pleated electrode structure according to other systems will have geometric voids: at least 80% of the volume voids, such as between approximately 82% and 90%; and a surface area of at least 0.02 square meters per gram (determined by BET ), The general range is between about 0.025 and 0.040 square meters per gram. The "geometric volume void" proposed by the craftsman is the part of the void within the envelope of the corrugated electrode structure, which contains the open space between the folds. They can be made of a metal composite structure, such as a mesh structure of braided threads, and the mesh structure has been specifically made of fine nickel powder, and then sintered and wrinkled to achieve the desired size. In addition, they can also be made by arranging particles or cilia of a specific metal such as nickel, silver, etc .; or ‘can also use specific metal powder to sinter the metal fiber, and then wrinkle to achieve the desired size. The pleat of the structure according to the present invention can also be manufactured in a conventional manner, although other methods such as stamping, rolling or other similar methods can also be used. However, the best method is still using pleating. The conventional pleating system can take various forms. For example, they can appear parallel in a thin, sheet-like style. In addition, the 'electrode structure may have a substantially circular shape with fan-shaped pleats. In other conventional embodiments, they may take the form of a cylinder, a spiral, or the like. In addition, it is known that the pleats can be parallel to 15 wood paper. The size is applicable to China National Standard (CNS) A4 (210 X 297 mm) / ------- (Please read the precautions on the back before filling in this page)

541197 A7 ___B7__ _ 5. Description of the invention (//) (Please read the notes on the back before filling out this page) Discounts will be made at or through the main pleats. The pleat can also be flexed, tapering or discontinuous at the end, and it can also vary in height over its length. If a metal powder such as nickel is sintered into a pedestal structure, such as a metal fiber sintered into stainless steel or a mesh structure of a wire, a conventional technique as disclosed in U.S. Patent No. 4,562,039 can be applied. Basically, the method described in this patent case requires the formation of a stable suspension of diffusion metal particles such as nickel in a fluid medium, and the stable suspension is then used to form a network structure such as a braided wire or Sintered stainless steel metal fiber, a substrate or support with small holes, and then use the support to make the stable suspension of the metal powder fill each opening, and then heat the stuffed support to dry the suspension; Ground, the dry and stuffed support can be compressed to provide better contact between adjacent particles, and the compressed, dry and stuffed support is sintered to remove volatile materials, and the individual metal particles are diffused into the Metal supports and interdiffusion. Any conventional material, such as nickel or sintered metal fibers, can be wrinkled and used to make electrodes for batteries. Similarly, ~ depth filter 〃 is a filter with fine pores that can exclude fluid particles. Among them, the particles are smaller than the size of the pores in the filter, and the particles are captured by gradual interception only during the direction change of the pores. This type of depth filter has a high dirt capacity. However, although this design has been applied, it cannot solve the existing problems. Depth filters are widely used in filter media with thick and continuous cylinders. The paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 541197 A7 ___B7___ 5. Description of the invention (丨 0 form, Moreover, the medium can surround a central core under the restraint of an outer shell. Due to the low outer surface area and the great depth (generally about 15 millimeters) of this depth-producing device, when the fluid passes through This filter generates a considerable pressure drop. On the other hand, as described previously, this depth filter has a high dirt containment capacity due to its high internal void volume capable of containing pollutants. Similarly, a conventional filter element composed of an elongated weave of cellulose filter material is foldable and extends back and forth between the inside and outside surfaces of a tubular body. The pleats extend longitudinally, And there is a tubular restraint strip fixed to the inner pleats. There is no filter layer. A woolen material using a flat sheet supported by a braided silk thread The end of the formed filter's sheet is sealed after being pleated. The braided wire supports the felt, and no layer is provided therein. A wavy shape is formed by the depth filter medium. A filter element made of a sheet, which has protective layers upstream and downstream, and the edges of the sheet are joined together after being folded. In U.S. Patent No. 4,233,040, a glass fiber filter is disclosed. Pleated filter media made of thin sheet. In European Patent A-0083789, a filter material of pleated sheet, such as fiber filter material, is disclosed. After the folding is completed, the edge of the sheet will reach the side Side seal. Since the condition of the blessing fence will increase the surface area per unit volume of the filter material, and thus increase its dirt holding capacity, the situation of side seal after the fence is completed may be very unfavorable. First of all, this secret -------------- install --- (please read the note on the back and fill in this page first) (210 x 297 541197 A7 ___ Β7__ 5. Description of the invention (ft) The appearance of the seal is caused by the filter element to block the uniform flow. Second, the side seal after the wrinkles requires additional processing steps. Third, because It is very difficult to achieve a complete seal, so the appearance of the side seal constitutes a potential leakage path. To achieve the optimal performance of a pleated filter, the method that has been adopted is to set a relatively rough filter upstream Layer to allow the fluid to filter down between the pleats and provide the void space needed to accumulate the dirt. Such attempts to support the filter media have not been widely accepted. In known practices, it is necessary to A relatively rough filtering layer is arranged downstream to allow the filtering fluid to flow out between the pleats through an inner passing layer, and to support the filtering medium by the applied pressure. Conventionally, the filter layer is constituted by a non-woven fabric or a mesh disposed on either side of the filter medium in a manner separated from the filter medium. The arrangement of such individual layers and the manner in which they are attached to the filter medium will increase the complexity and cost of manufacturing the filter. Filtration is widely used to remove various pollutants from the flow of a gaseous or liquid fluid. Therefore, during the filtration process, the fluid passing through the filtering medium, whether it is a single or repeated circulation method, its filtering efficiency is actually limited by the surface area of the medium, and the high-efficiency filter must have a large Area-shaped filter media. To minimize the size of the filter combination, filters of various configurations have been developed. The selection of the structure is based on the characteristics of the filtering medium itself and the methods necessary for filtering, such as the volume, pressure drop, and characteristics of the pollutants that it filters. 18 This paper size is applicable to Chinese National Standard (CNS) A4 specification mo X 297 male f〉 ------------- Loading --- (Please read the precautions on the back before filling this page) ir mouth' -

541197 A7 _______B7 _— 15. Description of the invention (丨 ^) / A known type of filter structure, which includes a spirally wound body configured with a filter medium, so that the fluid therein can be axial or radial Flowing through. The other type of construction contains a pleated medium. One of the specific structures of the pleated medium consists of a medium that is formed in a cylindrical shape and is relatively flat in the longitudinal direction. In some cases, the pleats wrap around the axis of the cylinder in a spiral manner. This pleated structure is sometimes referred to as a semi-spiral-wound filter. U.S. Patent Nos. 3,042,571 and 2,327,548 disclose various pleated structures and spirally wound filters. All of these designs were made to produce the nucleus area that must be retained. A particularly important type of filter is a filter element comprising a porous membrane. These films are generally made of polymer materials and contain fine pores with precise size control, and the size of the pores ranges from large porosity to small porosity, and even super porosity. These thin films are generally very thin and fragile, and diatomizers containing porous films often incorporate a support element. U.S. Patent No. 4,500,426 discloses a plurality of filters having a structure including a porous film, wherein the filter includes a filter having pleats and a spirally wound film. As shown in the patent, the film is bent along a spacer and wound around a central core. The central core must provide support and stabilization to the filter element in order to avoid damaging the rather fragile membrane. However, it has to be eliminated for several reasons. One of them is that the core core restricts the effective area of the filter to some extent, and the use of the core core will not only increase the material cost of the filter element, but also cause its manufacturing time and 19 paper standards applicable to the country of China. Standard (CNS) A4 specification (21〇X 297 mm) ---------------- (Please read the precautions on the back before filling this page). 541197 A7 ______ B7 ___— 1 5. Description of the invention Qf) The burden of labor. However, in consideration of the structural integrity of conventional membrane filters, it is necessary to have a central core in the manufacturing process. Therefore, it is clear that the conventional filter system and the different pressures' must raise the problems that have existed for a long time. [Invention Summary] In applications that require a smaller retention core and a higher flow rate, it is necessary to have a different filtering geometry. The structure with stepped pleats proposed by the present invention increases the filtering area. This feature can be accompanied by an increase in flow rate and circulation operation life. The design of the present invention provides a core-like support, even though there is essentially a solid core-core component. According to the novel arrangement of the reinforced folding of the present invention, the support member generated in the structure can support the inner surface of the filter, which can eliminate the problem caused by the differential pressure, because the differential pressure will eliminate the surface for filtering. Effect of area. According to a feature of the present invention, it is provided with a pleated filter element, and a mechanism for avoiding pressing of the multiple pleats of the segment. Wherein, the filter element further includes a plurality of pleated elements and regions of different groups, and the pleated height in each region is adjusted as a function of a desired flow rate. Therefore, the maximum filtering effect per unit area and the desired flow rate are achieved by maximizing the area and differently arranging the pleat height. In short, the present invention achieves an enhanced flow rate by a novel layered pleating device, so a variable pleating height ratio and 20 paper sizes are applicable to China National Standard (CNS) A4 Specifications (210 X 297 mm) ---------------- (Please read the notes on the back before filling out this page) · 541197 A7 ___B7 V. Description of the invention (θ)- --------------- (Please read the notes on the back before filling this page) The number of measures determines the structure of the individual level, and the level structure is used for the present invention Every specific case of principle. And 'according to the principles of the present invention, a higher flow rate can be achieved relative to the conventional pleated geometry. According to a feature of the present invention, 'it has a novel filter', which comprises in combination a filter element which is substantially cylindrical and covers several pleated components; a filter element which is provided around a core and is predetermined; The interpositional relationship configures each of the plurality of folding units; an inlet mechanism for allowing a desired medium to enter the filter element; and an outlet mechanism for allowing the desired medium to exit the filter element. %-According to another feature of the invention, it has a filtering device 'which contains ... a filtering element which is generally cylindrical covering a plurality of pleated components; A predetermined interpositional arrangement of the mechanism for each of the plurality of pleated components; an inlet mechanism for allowing a desired medium to enter the filter element; and an outlet mechanism for allowing the desired medium to exit the filter element; and , Wherein the relationship of the double pleated assembly further includes a ratio of 1: 2/3: 1/3 taken between the individually configured pleated components and the taken between the individually configured measures. A ratio of 1: 2/3: 1/2: 1/3, at least one of the two. [Brief Description of the Drawings] The previously mentioned and other features of the present invention, as well as the method of obtaining them, can be made more apparent by combining the drawings. However, these drawings only show a typical embodiment of the present invention, so they are not intended to limit the scope of the present invention. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 541197 A7 __B7 _ V. Description of the invention (> 4). Instead, they are used to enhance the explanation and detailed effect, among them: ----------------- (Please read the precautions on the back before filling this page) Picture 1 is According to the present invention, a schematic perspective view of a proportion of the height of the pleats around it is shown in a preferred embodiment; FIG. 1A depicts a pleated sequence of three layers of pleats according to an embodiment of the present invention; According to the present invention, a schematic perspective view of a proportion of the height of the pleats around it is shown in another preferred embodiment. FIG. 3 illustrates a cylindrical filter element incorporating a pleating sequence according to the present invention襕; FIG. 3A is a cross-sectional view illustrating the cylindrical filter element shown in FIG. 3 taken along line 3-3; and FIG. 3B illustrates a part of the partition shown in FIG. 3A. [Explanation of component symbols]. La, lb pleats 3b5 3c legs 201 core core 202 outer body 203 compartment 204a end cap 204b end cap 205 outer support tube 206 pleated sequence 207 filter element 22

National Standard (CNS) A4 Specification (210 X 297 mm &T; 541197 A7 __B7 _ V. Description of Invention (yj) \ [Detailed description of preferred embodiment] (Please read the precautions on the back before filling this page) The inventors have discovered that they can achieve an innovative microfiltration method and device by modifying the relationship between the number of pleats, the height of the existing pleats, and their structure in the context of a filter device that has been developed. Applications that require a high flow rate with a low retention effect can be changed drastically by unexpected methods. Among them, the low attention is related to the flow rate and the operating life of the flow. The novel level pleats of the present invention The filtering mechanism of the case is as described in the attached table. The principle feature of the present invention can be developed using a Rabofsky pleated generator combined with technologies such as side sealing and end covering; among them, the Rabofsky pleated generation (According to the pleating machine number: R178PC) is a tool that controls a microprocessor, and the end cover is composed of conventional components. Now refer to Section 1 Among them, a novel filter in a preferred embodiment is shown in accordance with the principles of the present invention. As shown in this sketched style of folding, the relationship of the multiple pleated components is further included in the individual configuration A typical ratio of about 1: 2/3: 1/3 is taken between the pleated components, and this ratio is the main reason for the high flow rate and is an advantageous feature of the invention. Now refer to section 2 Figure, which shows a novel filter in another preferred embodiment according to the principles of the present invention. As shown in the sketched pleated style, the relationship of the multiple pleated components is further included in the Another one taken between individually configured pleated components is about 1: 3/4: 23 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 541197 A7 _ _ B7 _ V. Description of the invention (Yv) I / 2: a ratio of 1/4, and this ratio is the main reason for the high flow rate 'and is an advantageous feature of the present invention. As shown in FIG. 3, filtering according to an embodiment of the present invention Components can also be found in Each end of the filter element 207 (illustrated in FIG. 3A) includes end caps 204a and 204b. In the embodiment of the present invention, 'the end caps 204a and 204b may be attached to the partition 203, The inner core 201 and / or the outer sheath 202. The filter element 207 may also be wrapped in an outer support tube 205. In Fig. 3, the outer support tube 205 and a part of the outer sheath 202 are cut away. To show the folded compartment 203 °, FIG. 3A is a cross-sectional view illustrating the filter assembly shown in FIG. 3. The filter element may have a core 201 and an outer sheath 202. The pleating sequence 206 may also be repeated around the core core 201 to form the partition layer 203. In particular, FIG. 3A illustrates an embodiment in which the partition layer 203 is formed using a pleated sequence 206 with three pleats, wherein the pleated contacts are similar to those of FIG. 1 with a height ratio of 3: 2: 1. Fold. FIG. 3A shows only a part of the interlayer 203; in the embodiment of the present invention, the fold sequence can be repeated, so that the interlayer 203 completely surrounds the core core 201. The interlayer shown in FIG. 3 Part of a multilayer embodiment of 203 is illustrated in Figure 3B. As shown in the figure, the medium to be filtered flows from the side of the partition 203 close to the outer sheath 202 ("upstream side") to the bottom side of the partition 203 close to the core core 201 ("downstream" side"). In an alternative embodiment, the direction of flow can be reversed, that is, the 24 paper sizes are applicable to the Zhongguanjia Standard (CNS) A4 specification (21G X 297 male f) --------- ----- Install --- (Please read the precautions on the back before filling this page) Order:% _ 541197 A7 ____B7___ V. Description of the invention (1). The / upstream side of the partition 203 can access the core core 201 , And the downstream side of the partition layer 203 can be close to the outer sheath 202. In one embodiment of the present invention, the partition layer 203 may include a partition element on the upstream side, the downstream side, or both of the partition layer 203. The compartment elements may be placed such that when adjacent pleats move together, the compartment elements on the adjacent pleats intersect or contact each other. Using pleats 2 in FIG. 1A as an example, the compartment element placed on the leg portion 3b of the primary fold la can be related to the compartment element on the leg portion 3c of the secondary fold lb. The compartment elements can be separated by a sufficient space, and the size of the space does not significantly reduce the filtering area of the compartment 203. The filter element may have a round core 201 and / or an outer sheath 202. However, in the embodiment of the present invention, the core core 201 and the outer protective body 202 may be rectangular or have different shapes. In the embodiment of the present invention, the core core 201 and the outer guard 202 may have different shapes. 25 (Please read the notes on the back before filling out this page) Binding -------- Applicable to China National Standard (CNS) A4 specifications (210 X 297 mm)

Claims (1)

541197f / ^ ^ Six, patent application scope 1. An innovative filter comprising: a substantially cylindrical filter element covering a plurality of pleated components; a mechanism for arranging each of the plurality of pleated components in a predetermined spatial relationship around a core; An inlet mechanism for allowing a desired medium to enter the filter element: and an outlet mechanism for allowing the desired medium to exit the filter element; therefore, the surrounding core can be maintained during repeated filtering operations Interposed relationship. 2. The filter according to item 1 of the scope of patent application, wherein the relationship of the plurality of pleated components further includes at least one of about 1: 2/3: 1/3 taken between the individually configured pleated components. The folding assembly is built in several segmented areas. 3. The filter according to item 1 of the scope of patent application, wherein the relationship of the plurality of pleated components further includes at least one of approximately 1: 3/4 ·· 1 / taken between the individually configured pleated components. 2 ·· 1/4 scale, and the pleats and pieces are built in several segmented areas. 4. A filtering device comprising: a generally cylindrical filter element covering a plurality of pleated components, and each of the plurality of pleated components arranged in a predetermined interposition relationship around a core. A mechanism; an inlet mechanism for allowing a desired medium to enter the filter element; and 1 ......... ϋφ ^ ί ......------ --Order ---------------- (Please read the precautions on the back before transcribing this page) This paper size is applicable to China National Standard (CNS) A4 (210 X 297) (Centi) 541197 6 / Λ L88825 ABCD VI. Patent application scope An outlet mechanism for allowing the desired medium to exit the filter element; and the relationship between the several pleated components is further included in the individually configured folded components Ratio of at least about 1: 2/3 ·· 1/3 and ratio of 1: 2/3: 1/2: 1/3 between the individually configured pleated components, between at least one. 5. A filtering device comprising: a plurality of pleated components in a predetermined interposition relationship and covering areas of different groups; and a mechanism for avoiding suppression of the areas of the different groups, wherein Achieve maximum filtration effect and desired flow rate per unit. 6. The filtering device according to item 5 of the patent application scope, further comprising a core. 7. The filtering device according to item 5 of the scope of the patent application, wherein the areas of the different groups and the plurality of pleated components define a core space, so that the core space can be maintained over time. 2 This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) ......--------------- Order -------- ------- r (Please read the notes on the back before writing this page)