JP2016203091A - Filter element, and filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter device capable of preventing air from accumulating between a first filter medium and a second filter medium.SOLUTION: A first filter medium is disposed to have a central axis substantially along a vertical direction, and a second filter medium is disposed on the inner side of a first internal cylinder. The first internal cylinder is formed with a through hole in a first region or a band-shaped region in the vicinity of the upper end, but no through hole is formed in a second region other than the first region.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a filter element and a filter device.

  In Patent Document 1, a cylindrical first filter medium having a function of removing dust in fuel, a second filter medium housed inside the first filter medium, and having a function of removing moisture in the fuel, A filter element is disclosed.

JP 2011-230111 A

  In the invention described in Patent Document 1, air accumulates between the first filter medium and the second filter medium, which may impede the flow of fuel.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a filter element and a filter device that can prevent air from accumulating between the first filter medium and the second filter medium. To do.

  In order to solve the above-described problem, a filter element according to the present invention includes, for example, a substantially cylindrical first filter medium and a first inner cylinder provided along the inner periphery of the first filter medium. A first element, the first filter medium and a first element in which a central axis of the first inner cylinder is provided substantially along a vertical direction; and the first element inside the first inner cylinder. A second element having a second filter medium having a substantially cylindrical shape provided substantially parallel to the inner cylinder of the first element, and a second element through which the liquid that has passed through the first element passes. The first inner cylinder is formed with a first through hole through which the liquid passes only in a first region which is a band-like region near the upper end.

  According to the filter element according to the present invention, the first filter medium whose central axis is provided substantially along the vertical direction and the second filter medium are provided inside the first inner cylinder. In the first inner cylinder, a through hole is formed in a first region that is a band-like region near the upper end, and no through hole is formed in a second region other than the first region. By forming a through-hole through which the liquid passes only in a region near the upper end of the first inner cylinder, the liquid in which the air accumulated between the first element and the second element flows through the through-hole Extruded. Thereby, it is possible to prevent air from accumulating between the first filter medium and the second filter medium. Moreover, the whole 1st filter medium can be used and it can prevent that filtration performance falls early.

  Here, the second element has a second inner cylinder provided along an inner circumference of the second filter medium, and the second inner cylinder has a vertical direction with respect to the first region. A second through-hole through which the liquid passes may be formed only in a third region that is a region where the position is substantially the same. Thereby, the air that has passed through the through hole passes through the through hole as it is together with the liquid, and the air can be efficiently pushed out to the inside of the second element.

  Here, the lower end of the first filter medium and the lower end of the second filter medium may have different height positions. Thereby, a water | moisture content can fall between the 1st filter medium and the 2nd filter medium.

  Here, the first plate is provided at the lower end of the first filter medium, the second plate is provided at the lower end of the second filter medium, the lower end surface of the second plate, The distance from the upper end surface of the first plate may be equal to or greater than the distance between the inner peripheral surface of the first inner cylinder and the outer peripheral surface of the second plate. Thereby, the water can be reliably dropped without narrowing the flow path of the water W.

  In order to solve the above problems, a filter device according to the present invention includes, for example, a filter element and a housing in which the filter element is provided, and the liquid flows between the filter element and the housing. In the first element, dust contained in the liquid is removed, and in the second element, moisture is removed from the liquid that has passed through the first element, and the moisture is removed from the second filter medium. And is dropped between the first element and the second element.

  According to the present invention, it is possible to prevent air from accumulating between the first filter medium and the second filter medium.

It is principal part sectional drawing which shows the outline of the filtration apparatus 1 which is embodiment of this invention. 2 is a cross-sectional view showing an outline of a cartridge 10. FIG. 4 is a cross-sectional view of a first inner cylinder 53. FIG. How the fuel F flows when the through hole 53a is formed in the entire first inner cylinder 53 and when the through hole 53a is formed only in the vicinity of the upper end of the first inner cylinder 53 It is a figure explaining whether it is different. 3 is a partially enlarged view of the filter element 11. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of an essential part showing an outline of the filtration device 1. The filtration device 1 removes dust, moisture, and the like contained in a liquid such as fuel. In FIG. 1, for the sake of explanation, a part of hatching display showing a cross section is omitted.

  The filtration device 1 includes a cartridge 10 having a filter element 11 for filtering fuel, a head member 20 for supplying the fuel F to the cartridge 10 or discharging the fuel F from the cartridge 10, and moisture W separated by the filter element 11. The water storage part 30 which accommodates.

  The cartridge 10 mainly includes a filter element 11 and a housing 12. A filter element 11 is accommodated in the housing 12.

  A head member 20 is attached to the upper side (+ z side) of the housing 12. The gasket 41 seals between the housing 12 and the head member 20. In addition, a water reservoir 30 is attached to the lower side (−z side) of the housing 12. The gasket 42 seals between the housing 12 and the water reservoir 30. Details of the cartridge 10 will be described later.

  The head member 20 mainly includes a head main body 21, a connection cylinder 22, a priming pump 23, and valves 24 and 25.

  In the head main body 21, an inflow path (not shown. In the present embodiment, there is an inflow path on the back side in FIG. 1) that mainly guides the fuel F before being filtered to the filter element 11. An outflow passage 21b for discharging the fuel F after being filtered by the filter element 11 to the outside of the filtering device 1 is formed.

  A connection tube 22 is provided on the bottom surface of the head body 21. In addition, a hole 21c that connects the connection tube 22 and the outflow path 21b is formed on the bottom surface of the head body 21.

  A priming pump 23 is provided on the side surface of the head main body 21 to remove air accumulated in the cartridge 10.

  The water storage unit 30 mainly includes a case 31, a float 32, a drain plug 33, and a sensor 34.

  The case 31 is a member that accumulates moisture separated by the filter element 11, and is formed using a transparent resin. A float 32 is enclosed inside the case 31. The float 32 is formed so as to float on the water surface. A drain plug 33 is provided below the case 31. When the drain plug 33 is pulled out, the moisture accumulated in the case 31 is discharged to the outside. A sensor 34 is provided at the bottom of the case 31.

  In FIG. 1, the flow of the fuel F is indicated by a thick arrow. The fuel F guided from the fuel tank (not shown) to the filtration device 1 is in a state before being filtered. The fuel F flows into the interior of the housing 12 (the space between the housing 12 and the filter element 11) through the inflow path. Dust and moisture W are removed from the fuel F flowing into the housing 12 by the filter element 11.

  The fuel F filtered by the filter element 11 flows out from the filter element 11 through the inside of the connecting cylinder 22 and the valve 24 to the outflow path 21b. The fuel F that has flowed out to the outflow path 21 b flows out of the filtration device 1 through the valve 25. The fuel F flowing out from the filtering device 1 is guided to an engine (not shown).

  Moisture removed by the filter element 11 flows out from the inside of the filter element 11 to the water storage unit 30 and accumulates in the case 31 as indicated by a thick two-dot chain arrow in FIG. When the amount of water in the case 31 increases, for example, when the amount of water in the case 31 exceeds a certain threshold, the drain plug 33 is removed and water is discharged from the case 31.

  Next, details of the cartridge 10 will be described. FIG. 2 is a cross-sectional view schematically showing the cartridge 10. In FIG. 2, for the sake of explanation, a part of hatching display showing a cross section is omitted.

  The cartridge 10 mainly includes a filter element 11, a housing 12, a gasket 13, a base 14, and a lid 15.

  The filter element 11 mainly has a first element having a function of removing dust in the fuel F and a second element having a function of removing moisture in the fuel F. The filter element 11 will be described in detail later.

  The housing 12 is a substantially cylindrical member made of metal, for example. The lower end of the housing 12 is provided on a first lower plate 56 (detailed later) of the filter element 11. A lid 15 is provided at the upper end of the housing 12. A seal member (not shown) is sealed between the housing 12 and the first lower plate 56 and between the housing 12 and the lid 15.

  The lid 15 is provided with a base 14. When the lid 15 is integrated with the housing 12, the base 14 presses the gasket 13 downward (−z direction). As a result, the filter element 11 is accommodated in the housing 12 in a fixed posture.

  Here, the filter element 11 will be described in detail. The filter element 11 mainly includes a first filter medium 51, a second filter medium 52, a first inner cylinder 53, a second inner cylinder 54, a first upper plate 55, and a first lower plate. 56, a second upper plate 57, and a second lower plate 58. The first filter medium 51, the first inner cylinder 53, the first upper plate 55, the first lower plate 56, and the like constitute a first element, and the second filter medium 52, the second inner cylinder 54, the first The second upper plate 57, the second lower plate 58, and the like constitute a second element.

  The first filter medium 51 is formed by folding a plate-shaped material (pleat-shaped) into a substantially cylindrical shape. The first filter medium 51 collects dust in the fuel F. Thereby, dust is removed from the fuel F that has passed through the first filter medium 51. In the present invention, dust is a foreign matter other than moisture, for example, a fine solid. When the filter element 11 is in use, the central axis of the first filter medium 51 is provided substantially along the vertical direction.

  The first inner cylinder 53 is provided along the inner periphery of the first filter medium 51. The first inner cylinder 53 is made of, for example, metal and has a substantially cylindrical shape. A plurality of through holes 53 a are formed in the first inner cylinder 53. The central axis of the first inner cylinder 53 is the same as the central axis of the first filter medium 51.

  FIG. 3 is a cross-sectional view of the first inner cylinder 53. The through hole 53a is formed in a region where air easily collects, that is, in the vicinity of the upper end (the end on the + z side) of the first inner cylinder 53. Here, a region where the through hole 53a is formed is referred to as a region I, and a region where the through hole 53a is not formed is referred to as a region II. The region I has a height of about 1/3 to about 1/2 (about 1 / 3H to about 1 / 2H) of the height H of the first inner cylinder 53 from the upper end of the first inner cylinder 53. This is a belt-like region. In other words, the region I may be a region that substantially coincides with a region where air can accumulate (approximately ½H from the upper end) or a region that is narrower than a region where air can accumulate.

  Note that the region I may or may not include the upper end of the first inner cylinder 53. For example, the region III that overlaps the first upper plate 55 in the region I is a region in which the fuel F does not flow to the second filter medium 52, and thus it is not always necessary to form the through hole 53 a. . Further, in addition to the region III, the region IV including a portion overlapping the second upper plate 57 is a region in which the fuel F hardly flows to the second filter medium 52, and thus it is not always necessary to form the through hole 53a. Absent.

  Returning to the description of FIG. The first filter medium 51 and the first inner cylinder 53 are provided with a first upper plate 55 so as to cover the upper ends (+ z side) of the first filter medium 51 and the first inner cylinder 53. The first filter medium 51 and the first inner cylinder 53 have a first lower plate 56 so as to cover the lower end (−z side) of the first filter medium 51 and the first inner cylinder 53. Provided. The first upper plate 55 and the first lower plate 56 are bonded to the first filter medium 51 and the first inner cylinder 53.

  The first upper plate 55 includes a bottom part 55 a that covers the end surfaces of the first filter medium 51 and the first inner cylinder 53, an outer peripheral part 55 b that covers the outer peripheral surface of the first filter medium 51, and the first inner cylinder 53. An inner peripheral portion 55c covering the inner peripheral surface. The inner peripheral portion 55 c is fitted with the outer peripheral surface of the gasket 13.

  The first lower plate 56 includes a bottom part 56 a that covers the end surfaces of the first filter medium 51 and the first inner cylinder 53, an outer peripheral part 56 b that covers the outer peripheral surface of the first filter medium 51, and the first inner cylinder 53. An inner peripheral portion 56c covering the inner peripheral surface.

  A recess 56d is formed in the bottom 56a. Moisture that has passed through the recess 56d flows out to the case 31 through a hole (not shown).

  An attachment portion 56e to which the housing 12 is attached is formed on the outer peripheral surface of the bottom portion 56a. Further, on the outer peripheral surface of the bottom portion 56a, a male screw portion 56f into which a female screw portion (not shown) of the case 31 is screwed is formed near the lower end.

  The second filter medium 52 is formed by folding a plate-shaped material having water repellency into a substantially cylindrical shape (pleated). The second filter medium 52 is accommodated inside the first inner cylinder 53. The second filter medium 52 is arranged such that the central axis is substantially parallel to the central axis of the first filter medium 51. In the present embodiment, the central axis of the second filter medium 52 is the same as the central axis of the first filter medium 51.

  The second filter medium 52 is formed of a material having water repellency. Therefore, moisture in the fuel F is collected by the second filter medium 52.

  The second inner cylinder 54 is provided along the inner periphery of the second filter medium 52. The second inner cylinder 54 is made of, for example, metal and is formed in a substantially cylindrical shape. A plurality of through holes 54 a are formed in the second inner cylinder 54. The diameter and pitch of the through holes 54a are the same as those of the through holes 53a. The central axis of the second inner cylinder 54 is the same as the central axis of the second filter medium 52.

  The through hole 54a is perpendicular to the region I in which the through hole 53a is formed in the first inner cylinder 53 when the first element and the second element are assembled (z direction, the same applies hereinafter). Are formed in substantially the same region. For example, the region where the through hole 54 a is formed is a belt-like region having a height that is approximately ½ of the height of the second filter medium 52.

  In addition, the area | region in which the through-hole 54a is formed may include the upper end of the 2nd inner cylinder 54, and does not need to include it. For example, the region overlapping the second upper plate 57 is a region where the fuel F does not flow to the inside of the second filter medium 52, and thus the through hole 54a may not be formed.

  The second filter medium 52 and the second inner cylinder 54 are provided with a second upper plate 57 so as to cover the upper end (+ z side) of the second filter medium 52 and the second inner cylinder 54. In addition, the second filter plate 52 and the second inner cylinder 54 include a second lower plate 58 so as to cover the lower end (−z side) of the second filter medium 52 and the second inner cylinder 54. Is provided. The second upper plate 57 and the second lower plate 58 are bonded to the second filter medium 52 and the second inner cylinder 54.

  The second upper plate 57 includes a bottom part 57 a that covers the end surfaces of the second filter medium 52 and the second inner cylinder 54, an outer peripheral part 57 b that covers the outer peripheral surface of the first filter medium 51, and the first inner cylinder 53. And an inner peripheral portion 57c that covers the inner peripheral surface.

  The second lower plate 58 includes a bottom part 58 a that covers the end surfaces of the second filter medium 52 and the second inner cylinder 54, an outer peripheral part 58 b that covers the outer peripheral surface of the first filter medium 51, and the first inner cylinder 53. An inner peripheral portion 58c covering the inner peripheral surface.

  A method for assembling the filter element 11 configured as described above will be described. A first inner cylinder 53 is provided on the inner peripheral surface of the first filter medium 51, and a first upper plate 55 and a first lower plate 56 are bonded to both ends of the first filter medium 51 and the first inner cylinder 53. Assemble the first element. Also, a second inner cylinder 54 is provided on the inner peripheral surface of the second filter medium 52, and a second upper plate 57 and a second lower plate 58 are provided at both ends of the second filter medium 52 and the second inner cylinder 54. Glue and assemble the second element. Further, by fitting the outer peripheral portion 57b of the second upper plate 57 to the inner peripheral portion 55c of the first upper plate 55, the first element and the second element are integrated.

  Thereafter, the inner peripheral portion 55 c is fitted to the outer peripheral surface of the gasket 13, whereby the integrated first element and second element are provided in the gasket 13. Accordingly, the space between the first element and the second element is sealed, and the fuel F that has not passed through the first filter medium 51 (first element) does not flow into the second filter medium 52. Further, when the inner peripheral surface of the gasket 13 is fitted to the outer peripheral surface of the connection tube 22, the filter element 11 is attached to the connection tube 22. In this state, the hollow portion formed by the inner peripheral portion 57 c communicates with the hollow portion of the connection tube 22.

  The flow of the fuel F in the filter element 11 configured as described above will be described. The fuel F that has flowed into between the filter element 11 and the housing 12 passes through the first filter medium 51 from the outside toward the inside. As the fuel F passes through the first filter medium 51, dust in the fuel F is collected by the first filter medium 51.

  A through hole 53 a is not formed near the lower end of the first inner cylinder 53. Therefore, of the fuel F flowing into the housing 12, the fuel F flowing into the vicinity of the lower end of the first filter medium 51 is guided in the first filter medium 51 to the vicinity of the upper end where the through hole 53a is formed. . Of the fuel F flowing into the housing 12, the fuel F flowing into the vicinity of the upper end of the first filter medium 51 passes through the first filter medium 51 as it is. The fuel F that has passed through the first filter medium 51 passes through the through hole 53 a and flows out between the first inner cylinder 53 and the second filter medium 52.

  The fuel F that passes through the first element and flows between the first inner cylinder 53 and the second filter medium 52 passes through the second filter medium 52 from the outside toward the inside. The fuel F that has passed through the second filter medium 52 passes through the through hole 54 a and flows out to the inside of the second inner cylinder 54. Here, the fuel F that has flowed out between the first inner cylinder 53 and the second filter medium 52 contains air. The air accumulates between the first inner cylinder 53 and the second filter medium 52, but the fuel F that has flowed in between the first inner cylinder 53 and the second filter medium 52 through the through hole 53a. Together, the second filter medium 52 is extruded from the outside toward the inside.

  4 shows a case where through holes 53a and 54a are formed in the entire first inner cylinder 53 and second inner cylinder 54, and only in the vicinity of the upper ends of the first inner cylinder 53 and the second inner cylinder 54. It is a figure explaining how the flow of the fuel F differs by the case where the through-holes 53a and 54a are formed. The left half of FIG. 4 shows a case where through holes 53a and 54a are formed in the entire first inner cylinder 53 and second inner cylinder 54 (comparative example), and the right half of FIG. The case where the through holes 53a and 54a are formed only in the vicinity of the upper ends of the inner cylinder 53 and the second inner cylinder 54 (this embodiment) is shown.

  When the through holes 53a and 54a are formed in the entire first inner cylinder 53 and second inner cylinder 54, the air A that has passed through the first filter medium 51 cannot pass through the second filter medium 52, It accumulates between the first inner cylinder 53 and the second filter medium 52. Since the fuel F does not flow in the portion where the air A is accumulated, the first filter medium 51 is used only in the region where the air A is not accumulated (for example, the lower half).

  On the other hand, when the through holes 53a and 54a are formed only in the vicinity of the upper ends of the first inner cylinder 53 and the second inner cylinder 54, the first inner cylinder 53 and the second inner cylinder 54 are entirely formed. Compared with the case where the through holes 53a and 54a are formed, the flow of the fuel F is faster. Therefore, the air accumulated between the first element and the second element can be pushed out together with the fuel F. As a result, the entire first filter medium 51 can be used, and the filtration performance can be prevented from being deteriorated early.

  Further, the through hole 54a has substantially the same vertical position as the region I in which the through hole 54a is formed in the first inner cylinder 53 when the first element and the second element are assembled. Formed in the region. Therefore, the air that has passed through the through hole 53 a passes through the through hole 54 a as it is, and the air is efficiently pushed out to the inside of the second inner cylinder 54.

  Returning to the description of FIG. The fuel F that flows out between the first inner cylinder 53 and the second filter medium 52 contains moisture. The moisture is removed by the second filter medium 52 and the fuel F from which the moisture has been removed flows into the second inner cylinder 54. The fuel F that has flowed into the inside of the second inner cylinder 54 flows out into the outflow passage 21b through the hollow part formed by the inner peripheral part 57c and the hollow part of the connection cylinder 22.

  Here, the flow of moisture repelled by the second filter medium 52 will be described in detail. The water W in the fuel F is repelled on the surface of the second filter medium 52, passes between the first element and the second element, and falls toward the recess 56d.

  FIG. 5 is a partially enlarged view of the filter element 11. An annular gap is formed between the first element and the second element. In the present embodiment, the distance between the outer peripheral surface of the second lower plate 58 and the inner peripheral surface of the first inner cylinder 53 is s.

  Further, the lower end of the first filter medium 51 and the lower end of the second filter medium 52 are different in vertical position. In the present embodiment, the distance between the upper end surface of the first lower plate 56 and the lower end surface of the second lower plate 58 is h. Here, the distance h is not less than the distance s. Thus, by shifting the vertical position of the upper end surface of the first lower plate 56 and the lower end surface of the second lower plate 58, the water W can be reliably dropped into the recess 56d.

  In the present embodiment, by forming the through hole 53a only in the region I in the vicinity of the upper end of the first inner cylinder 53, air accumulates between the first element and the second element, and the filtration performance Can be prevented from decreasing.

  Further, in the present embodiment, moisture W is accumulated between the first element and the second element by shifting the upper end surface of the first lower plate 56 and the lower end surface of the second lower plate 58. Can be prevented. In the present embodiment, the upper end surface of the first lower plate 56 and the lower end surface of the second lower plate 58 are shifted to remove dust and moisture W in the fuel F with separate filter media. The overall size of the filter element 11 can be reduced.

  In the present embodiment, the first element and the second element are arranged so that the distance h is equal to or greater than the distance s. However, the distance h is not necessarily equal to or greater than the distance s. At least the distance h may be not 0. For example, when the vertical position of the upper end of the first lower plate 56 and the upper end of the second lower plate 58 are the same, the water W is caused to be absorbed by the first lower plate 56 and the second lower plate due to surface tension. There is a possibility that it will accumulate between the two and 58 and will not fall toward the recess 56d. Such a problem may occur when the vertical positions of the first lower plate 56 and the second lower plate 58 overlap. On the other hand, if the positions of the first lower plate 56 and the second lower plate 58 in the z direction do not overlap, a flow path for moisture W can be secured. That is, at least the first lower plate 56 and the second lower plate 58 need not overlap in the z-direction position. However, in order not to narrow the flow path of the moisture W, it is desirable that the distance h be equal to or longer than the distance s.

  In the present embodiment, the lower end of the first element and the second element so that the distance between the upper end surface of the first lower plate 56 and the lower end surface of the second lower plate 58 is h. However, the method of shifting the height between the lower end of the first element and the lower end of the second element is not limited to this. For example, the second filter medium 52 may be longer than the first filter medium 51. However, in this case, the distance between the inner peripheral surface of the first lower plate 56 and the outer peripheral surface of the second lower plate 58 is such that the inner peripheral surface of the first lower plate 56 and the outer periphery of the second filter medium 52 are the same. It is desirable to increase the inner diameter of the first lower plate 56 at least in a portion overlapping with the second lower plate 58 so as to be substantially the same as the distance to the surface.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included. . A person skilled in the art can appropriately change, add, or convert each element of the embodiment.

  Further, in the present invention, “substantially” is a concept including not only a case where they are exactly the same but also errors and deformations that do not lose the identity. For example, “substantially parallel” is not limited to being strictly parallel, but is a concept including an error of, for example, several degrees. Further, for example, when simply expressing as parallel, orthogonal, coincidence, etc., not only strictly parallel, orthogonal, coincidence, etc., but also include cases of substantially parallel, substantially orthogonal, substantially coincidence, etc. Further, for example, “provided substantially along the vertical direction” is a concept including a case along the vertical direction and a case along the direction including the vertical direction and an error of about several degrees.

  Further, in the present invention, “near” means including a region in a certain range (which can be arbitrarily determined) near a reference position. For example, in the case of the vicinity of the upper end, it is a concept indicating that the region is in a certain range near the upper end and may or may not include the upper end.

1: Filter device 10: Cartridge 11: Filter element 12: Housing 13: Gasket 14: Base 15: Lid 20: Head member 21: Head main body 21b: Outlet passage 21c: Hole 22: Connection cylinder 23: Priming pumps 24, 25 Valve 30: Water reservoir 31: Case 32: Float 33: Drain plug 34: Sensors 41, 42: Gasket 51: First filter medium 52: Second filter medium 53: First inner cylinder 53a: Through hole 54: Second Inner cylinder 54a: through hole 55: first upper plate 55a: bottom 55b: outer peripheral portion 55c: inner peripheral portion 56: first lower plate 56a: bottom portion 56b: outer peripheral portion 56c: inner peripheral portion 56d: concave portion 56e: Mounting portion 56f: Male thread portion 57: Second upper plate 57a: Bottom portion 57b: Outer peripheral portion 57c: Inner peripheral portion 58: Second Plate 58a: bottom 58b: outer peripheral portion 58c: inner peripheral portion

Claims (5)

A first element having a substantially cylindrical first filter medium and a first inner cylinder provided along an inner circumference of the first filter medium, wherein the first filter medium and the first filter medium A first element in which the central axis of the inner cylinder is provided substantially along the vertical direction;
A second element having a substantially cylindrical second filter medium provided substantially parallel to the first inner cylinder inside the first inner cylinder, and the liquid that has passed through the first element passes A second element that
The first inner cylinder is formed with a first through-hole through which the liquid passes only in a first region which is a band-like region near the upper end. The filter element according to claim 1,
The second element has a second inner cylinder provided along the inner periphery of the second filter medium,
The second inner cylinder is formed with a second through-hole through which the liquid passes only in a third region that is substantially the same position as the first region in the vertical direction. Filter element. The filter element according to claim 1 or 2,
The filter element, wherein a lower end of the first filter medium and a lower end of the second filter medium are different in a height direction. A filter element according to claim 3,
A first plate is provided at the lower end of the first filter medium,
A second plate is provided at the lower end of the second filter medium,
The distance between the lower end surface of the second plate and the upper end surface of the first plate is not less than the distance between the inner peripheral surface of the first inner cylinder and the outer peripheral surface of the second plate. Feature filter element. The filter element according to any one of claims 1 to 4,
A housing in which the filter element is provided,
The liquid flows between the filter element and the housing;
In the first element, dust contained in the liquid is removed,
In the second element, moisture is removed from the liquid that has passed through the first element,
The moisture device is repelled by the surface of the second filter medium and falls through between the first element and the second element.

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