JPS61291015A - Filter element - Google Patents

Abstract

PURPOSE:To obtain a filter element having a wide filtering area and reduced in the resistance of a fluid, by applying pleating processing to a sheet like filter material to form pleats consisting of ridge parts and valley parts and respectively connecting the ridge part and valley part of each pleat up to the predetermined position of an oblique surface. CONSTITUTION:A filter element 10 is constituted by applying pleating processing to a sheet like filter material to form a larger number of pleats 1 consisting of ridge parts 2 and valley parts 3. Both oblique surfaces of each ridge part 2 at one end part of each pleat 1 are close to each other and areas from the apex of the inner surfaces thereof to predetermined positions are adhered by an adhesive to form a first connection part 5. Further, the lower parts not adhered from the lower end of the first connection part 5 of one end part 4 of the pleat 1 are obliquely folded back from the predetermined position of the valley part 3 to form a first oblique wall 6. By the same way, connection parts are formed to other pleats to form a filter body. Therefore, the extension of life is attained by the increase in a filtering area and filtering accuracy can be enhanced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used in internal combustion engines, etc. to remove dust contained in intake air, and dust and metal powder contained in fuel, lubricating oil, and hydraulic oil. The present invention relates to the filtration element and the heat of the filtration element.

[Conventional technology]

As a filtration element used in air filters, oil filters, etc., end plates are bonded to the top and bottom of a sheet made of paper, nonwoven fabric, etc. via adhesive, and sealing pads are provided on the top and bottom of the sheet. A chrysanthemum-shaped filter element is used. In addition, by folding the sheet-shaped filter material,
A rectangular filtration element consisting of a large number of pleats is formed, side plates and end plates are arranged and fixed to both sides of the filtration element and both ends of the pleats via adhesive, and a sealing pad is provided on the periphery of the lower part. A so-called rectangular filter element is also used. Furthermore, in the chrysanthemum-shaped filtration element and the square-shaped filtration element described above, without using end plates or side plates, a large number of corrugates and embossments are provided on the surface of the filter medium, and so-called pockets are formed by joining the ridges at both ends of the ridges of the filtration element. Types of chrysanthemum-shaped and square filtration elements are also used.

The above-described filtration element is used by being disposed within a casing having a fluid inlet and outlet.

[Problem that the invention seeks to solve]

In the chrysanthemum-shaped filter element described above, fluid such as air and lubricating oil enters from the outer peripheral surface of the filter element and exits to the inner peripheral surface, but the area of the inner peripheral surface of the filter element is much smaller than the area of the outer peripheral surface.

Therefore, when fluid flows from outside to inside the filtration element,
The fluid flow resistance depends on the area of the inner peripheral surface, which has a small area, and is higher than that commensurate with the filtration area.

Further, as fluid passes through and clogging progresses, the filtration surfaces of each fold of the filtration element come into close contact with each other, and therefore the effective filtration area decreases accordingly, resulting in a shortened service life. In addition, when one filtration element is attached to the casing, the fluid flows through the gap between the casing side wall and the outer peripheral surface of the filtration element at right angles to the folds, and after exiting from the inner peripheral surface of the filtration element, the fluid flows in the flow direction. It is bent at a right angle and exits from the central outlet of the casing, resulting in large fluid flow resistance losses. Further, the fluid entering from the casing inlet is not uniformly sucked over the entire surface of the filtration element, and there is a large amount of fluid near the inlet, and a small amount of fluid is far away. Therefore, if the filtration flow rate at the fluid inlet portion of the filtration element is higher than an appropriate value, the filtration accuracy and service life commensurate with the filtration area as a whole cannot be obtained. Furthermore, in the case of a chrysanthemum-shaped filtration element, the pitch of the folds is finer on the inner periphery than on the outer periphery of the filtration element. Even if you increase the number of threads or make the folds larger in order to lower the resistance or extend the life, you will not be able to obtain a proportional improvement in performance.

In addition, the above-mentioned rectangular filtration element has side plates and end plates on both sides and both ends of the filtration element, and the fluid inlet and outlet are arranged so as to avoid the side plate and end plate portions of the filtration element. The inlet is provided above the filtration element and the fluid outlet is provided below the filtration element. The fluid flow path starts along the folds of the filtration element, turns at right angles, returns to flow along the folds, and exits from the outlet. Therefore, the rectangular filter element has a high resistance to fluid flow. Furthermore, as in the case of the chrysanthemum-shaped filtration element, as fluid passes through the element and clogging progresses, the surfaces of each fold come into close contact with each other, resulting in a decrease in the effective filtration area and a shortened service life. . In addition, the folds of the rectangular filtration element are parallel to each other, and the fluid flow is concentrated in the center of the filtration element, resulting in a decrease in filtration accuracy due to uneven filtration flow rate, and a lifespan commensurate with the filtration area. There are problems such as not being able to obtain it.

Furthermore, the pocket type filter element has the same problem as the one above because it does not have end plates or side plates, and the flow of fluid is the same as the one above except for the fluid flow at the inlet of the rectangular filter element. are doing. In order to prevent the wet material from adhering, the surface of the wet material is corrugated or embossed, but due to the problem of cracking during processing, there is a limit to its height and it cannot be made too high. Further, even if corrugated or embossed materials initially have an effect of preventing adhesion, the height decreases over time, resulting in a decrease in the effect of preventing adhesion, and the initial performance cannot be obtained.

In all of the above cases, both end faces of the folds of the filtration element are closed, and when the fluid flows from the inlet to the outlet of the casing, the fluid flow becomes abruptly changed, turbulent, and uneven, resulting in the filtration of each fold. A phenomenon in which the surfaces come into close contact with each other occurs, resulting in a decrease in the net area. Therefore, there are problems such as an increase in fluid flow resistance, a decrease in filtration accuracy, and an inability to obtain a service life commensurate with the filtration area.

〔composition〕

The first invention involves pleating a sheet-like wet material to form a large number of pleats consisting of peaks and valleys, and predetermined portions of the peaks at one end of the pleats and the valleys at the other end. are joined respectively,
Further, each pleat is expanded to form a filter element, and fluid can flow out from the lower surface and the other end surface of the pleat.

The second invention provides a first sloped wall in the trough at one end of the pleats of the transient element having the above structure, and a second sloped wall in the crest at the other end of the pleats, which are wound in a fan shape. Furthermore, both side surfaces are joined to form a temporary body, and seal packings are provided at each end of the first inclined wall and the second inclined wall, respectively.

A third aspect of the present invention is to provide a first inclined wall in a valley at one end of the pleats of the filter element having the above structure, and a second inclined wall in a crest at the other end of the pleats, and at an end of each first inclined wall. An annular seal packing is provided to connect the starting end of the filtration element, the end flap of each second inclined wall, and the end of the filtration element.

[Effect]

Fluid entering the casing inlet enters the valley of each pleat from one end and top surface of the filtration element. Dust and other particles in the fluid are filtered by both p-filtration surfaces of the valleys of each fold.
The cleaned fluid reaches one inner surface of each pleat, passes through the other end and lower surface of each pleat of the filter element, and is supplied to the engine or the like via the outlet of the casing. The fluid as a whole flows along the folds, and within the folds, it flows in an oblique direction. The ridges at one end and the troughs at the other end are joined together, and the troughs of the ridges become narrower from one end to the other. The part is opposite to the valley part from one end side to the other second part.
Each inclined wall or the first and second seal packings function to maintain an appropriate gap between each pleat.

〔Example〕

In FIGS. 1 to 4, a filter element 10 is formed by pleating a sheet-like wet material made of wet paper, nonwoven fabric, etc. to form a large number of pleats 1 consisting of peaks 2 and valleys 3. Both slopes of each ridge 2 of one end 4 of the ridge 1 which has been folded and folded are brought close to each other, and the first joint 5 is formed by joining from the top of the inner surface to a predetermined position with adhesive. Form. Zarani Hidayama 1
The lower part of the unjoined first joint part 5 of the one end part 4 is diagonally folded back from the one end part 4 to a predetermined position of the valley part 3 of the pleat 1, and is folded back diagonally to each other. A first inclined wall 6 having an isosceles triangular shape is formed by the two opposing lower ends of the adjacent first joint portions 5 and a predetermined position of the valley portion 3 .

Furthermore, both slopes of each valley part 3 of the other end part 7 of each pleated ridge 1 are brought close to each other, and the second joint part 8 is formed by joining them from the bottom of the inner surface to a predetermined position with adhesive. do.

The portion above the unjoined second joint 8 of the other end 7 of the pleat 1 is from the other end 7 to the ridge 2 of the pleat 1.
The two opposing upper ends of the second joint part 8 and the peak part 2 are folded back diagonally at a predetermined position, and are adjacent to each other.
A second inclined wall 9 having an isosceles triangular shape is formed at a predetermined position on the top of the . The joining length of the first joining part 5 is greater than the joining length of the second joining part 8, and therefore the base dimension of the second inclined wall 9 is smaller than the base dimension of the first inclined arm 6.

The filter element 10 formed as described above is wound into a fan shape, and the starting end 11 and the terminal end 12 of the side surface of the pleat 1 are joined to form a transient body 15. At this time, the first and second inclined walls 6
．． The bottom of 9 is flat. Then, the sum of the thickness of the lower end of the first joint 5 of each pleat 1 and the length of the bottom of the first inclined wall 6 becomes the outer circumferential dimension of the filter body 15, and the second joint of each pleat 1 The thickness of the upper end of 8 and the second inclined wall 9
The sum of the lengths of the bases becomes the inner peripheral dimension of the transient body 15. The lower end of the outer peripheral edge of the filter body 15, that is, the first inclined wall 6
An annular first seal packing 16 is integrally molded on the outer peripheral edge and holds the bottom portion of the first inclined wall 6 and projects outward in a brim shape. Furthermore, at the upper end of the inner circumferential edge of the filter body 15, that is, at the inner circumferential edge of the second inclined wall 9, there is a second annular seal 17 which clamps the bottom part of the second inclined wall 9 and projects inward in the form of a brim. Molded in one piece.

The filtration element 30 configured as described above is installed in a casing 20 made of a dish-shaped body 21 having an outlet 22 and a deep dish-shaped cover 27 having an inlet 28. In case B, the first seal packing 16 of the transient element 30 is connected to the top surface of the flange 23 provided on the outer periphery of the podium 21 and the cover.
27 is held between the lower surface of a flange 29 provided on the outer periphery of the lower end. Further, the second seal packing 17 of the filter body 15 is held between the annular flange 25 on the upper part of the bridge 24 provided on the body 21 and the center surface of the cover 27. The body 21 and cover 27 are connected to the nut 2 provided on the bridge 24.
6 and bolts 31 to form a filter device 40.

As shown in FIGS. 5 to 9, the filter element 60 is formed by pleating a sheet-like material made of paper, nonwoven fabric, etc. to form a large number of pleats 51 consisting of ridges 52 and troughs 53. Each ridge portion 5 of one end 54 of the pleat ridge 51 which is folded and folded
The first joint portion 55 is formed by bringing both slopes of the two surfaces close to each other and joining them from the top of the inner surface to a predetermined position with an adhesive.

Further, the lower end of the unjoined first joint portion 55 of the one end 9 portion 54 of the pleat ridge 51 is folded back diagonally from the one end 54 to a predetermined position in the valley portion 53 of the pleat ridge 51. A first inclined wall 56 having an isosceles triangular shape is formed by the two opposing lower ends of the adjacent first joint portions 55 and a predetermined position of the valley portion 53 .

Further, both slopes of each trough 53 at the other end 57 of each pleated ridge 51 are brought close to each other, and the inner surface is bonded from the bottom to a predetermined position with adhesive to form a second bonded portion 58. do. Then, a portion of the other end 57 of the pleat 51 above the unjoined second joint 58 is folded back diagonally from the other end 57 to a predetermined position of the peak 52 of the pleat 51, and M, + A second inclined wall 59 having an isosceles triangular shape is formed by the two opposing upper ends of the second joint portion 58 that meet each other and a predetermined position of the top of the mountain portion 52 . The length of the first joint 55 is the same as the length of the second joint 58. Furthermore, the starting end 61 and the ending end 6 of the fold 51
2 is the first fitting portion 5 of one end portion 54 of the pleat ridge 51, respectively.
5 and the apex of the bottom of the second inclined wall 59 of the other end 57 of the pleat 51, and has a first rising portion 63 of a predetermined height. End 62 of the fold 51
It also has a similar second rising portion 64.

A first seal packing 66 is integrally formed on one end 54 of the transit element 60 formed as described above, which clamps the bottom portion of each first inclined wall 56 and projects outward in a brim shape. A second seal gasket 67 is integrally molded on the other end 57 of the element 60, and the second seal gasket 67 grips the bottom portion of each second inclined wall 59 and projects outward in a brim shape. Furthermore, Hidayama 51
Third and fourth seal packings 6B and 69 are integrally molded at the starting end 61 and the terminal end 62 so as to sandwich the rising portions 63 and 64, respectively. The first to fourth seal packings are integrated at each end, and the entire ring-shaped seal lever 64
Configure.

The filtration element 80 configured as described above is installed in a casing 70 made of a rectangular dish-shaped body 71 having a protruding lower part 2 on the side wall and a rectangular dish-shaped cover 77 having an inlet lower part 8 in the side wall. At this time, the annular seal packing 64 of the filter element 80 is held between the upper surface of the flange 73 provided on the outer periphery of the upper end of the body 71 and the lower surface of the flange rift 9 provided on the outer periphery of the lower end of the cup 7'1. The body 71 and the cover 72 are fixed to each other by a fixing means 76 such as a wire clip provided on the side wall of the body 71, thereby forming a pass-through device 190.

In each of the above embodiments, the base of each inclined wall is flat, but the length of each joint is shortened, and therefore the base of each inclined wall is lengthened to create a bulge upward or downward. You can do it like this. Alternatively, a portion corresponding to each inclined wall may be cut out, and a seal packing may be provided to cover the cut out triangular portion.

〔effect〕

As described above, according to the present invention, the peaks at one end of the pleats are closed to open the valleys, and the peaks at the other end of the pleats are opened to close the valleys, thereby allowing fluid flow. The structure allows fluid to enter not only from the top surface of the filtration element but also from one end, and then exit to the bottom surface of the filtration and the other end, ensuring a wide fluid passage surface inside and outside the filtration element. In addition, the fluid flows along the folds of the filtration element and diagonally within each fold.
There are no sudden changes in the direction of fluid flow. Therefore, fluid flow resistance can be reduced. In addition, since the peaks at one end of each pleat of the filtration element and the valleys at the other end, that is, one end and the other end of each filtration surface of the pleats, are joined alternately, it is possible to prevent fluid from passing through and clogging. Even as the folds progress, the effective surface area of each fold does not come into close contact with each other, and the effective surface area increases. Therefore, the life span can be extended. Furthermore,
When one filter element is attached to the casing, a large space can be created in the upper and lower parts of the filter element, and the pressure distribution inside and outside the filter element can be averaged. Since it is wide at one end and gradually narrows toward the other end, the fluid flow is averaged and the filtration flow rate in each part of the furnace material can be maintained uniform. Therefore, the filtration accuracy can be improved and the service life can be extended.

[Brief explanation of drawings]

1 and 2 are a plan view and a front view, respectively, of a filter element according to a first embodiment of the present invention. FIG. 3 is a perspective view of the ρ-transistor element of the same embodiment. FIG. 4 shows a p-filtration device equipped with the filtration element of the same embodiment. 5 to 7 are a plan view, a front view, and a side view, respectively, of a filter element according to a second embodiment of the present invention. FIG. 8 is a perspective view of the filter element of the same embodiment. FIG. 9 shows a filtration device equipped with the filtration element of the same embodiment. 1.51...Hidayama 2.52...
Yamabe 3.53... Yamabe 4.54...
...-Man end part 5.55... First joint part 6.56... First inclined dandelion 7.57... Other end part 8.58... ...Second joint portion 959...Second inclined fold

Claims (3)

[Claims] (1) A sheet-shaped filter medium is pleated to form a large number of pleats consisting of peaks and valleys, and both slopes of each peak at one end of the pleats are brought close together, and the peaks of the pleats are A first joint is formed by joining from the top of the inner surface of the fold to a predetermined position, and further, both slopes of each valley at the other end of the pleat are brought close to each other, and a predetermined joint is made from the bottom of the inner surface of the valley of the pleat. A filtration element in which a second joint portion is formed by joining up to the position. (2) A sheet-like filter material is pleated to form a large number of pleats consisting of peaks and valleys, and both slopes of each peak at one end of the pleats are brought close together, and the peaks of the pleats are A first joint is formed by joining the inner surface of the part from the top to a predetermined position, and a first slope is formed by two opposing lower ends of the first joint that are adjacent to each other and a predetermined position at the bottom of the valley. A wall is provided, and both slopes of each valley at the other end of the pleats are brought close to each other, and the inner surfaces of the valleys of the pleats are joined from the bottom to a predetermined position to form a second joint. A second joint formed by two opposing upper ends of adjacent second joints and a predetermined position on the top of the peak.
An inclined wall is provided, which is wound into a fan shape to join both sides of the pleats, and a first seal packing and a second seal packing are provided at the ends of each first inclined wall and the ends of each second inclined wall, respectively. A filtration element equipped with (3) A sheet-like filter medium is pleated to form a large number of pleats consisting of peaks and valleys, and both slopes of each peak at one end of the pleats are brought close together, and the inner surface of the pleats is A first slanted wall formed by joining from the top to a predetermined position to form a first joint, and formed by two opposing lower ends of the first joint and a predetermined position at the bottom of the valley. Further, both slopes of each valley at the other end of the pleat are brought close to each other, and the inner surface of the pleat is joined from the bottom to a predetermined position to form a second joint part, and 2 joints facing each other
a second inclined wall formed by the upper end of the first inclined wall and a predetermined position of the top of the crest; A filtration element equipped with an annular seal packing that connects the end.