JP6459841B2 - Tubular air cleaner - Google Patents

Description

  The present invention relates to a cylindrical first housing having an inlet formed in a peripheral wall, a second housing having an outlet formed in a bottom wall, and a cylindrical filter element provided inside the first housing and the second housing. The present invention relates to a cylindrical air cleaner provided with

  In Patent Document 1, a cylindrical body (hereinafter referred to as a case) having a peripheral wall formed with an inlet and a bottom wall formed with an outlet, a cover (hereinafter referred to as a cap) provided in an opening of the case, A cylindrical air cleaner (hereinafter referred to as an air cleaner) provided with a cylindrical filter element provided between a case and a cap is disclosed. The case and the cap are made of a hard resin material.

  A cylindrical separation plate called an air guide is integrally formed on the inner surface of the cap, and the separation plate and the peripheral wall of the case form a double tube structure. A cylindrical separation plate called an air guide is integrally formed on the inner surface of the bottom wall of the case, and a double-pipe structure is formed by the separation plate and the peripheral wall of the case. The filter element is accommodated on the inner peripheral side of these separation plates. A gap is formed in the axial direction between the separation plate of the cap and the separation plate of the case.

  The inlet is provided at a position facing the separation plate of the cap in the radial direction. Further, a discharge valve is provided at a position facing the case separation plate in the radial direction on the peripheral wall of the case.

  In such an air cleaner, the intake air introduced into the air cleaner from the inlet flows between the peripheral wall of the case and the separation plate of the cap while swirling toward the filter element. The dust contained in the intake air is captured when passing through the filter element, and the intake air that has passed through the filter element is led out of the air cleaner through the outlet.

  Further, foreign matters such as relatively large dust and water are introduced into the air cleaner through the inlet together with the intake air. Such foreign matter is centrifuged from the swirling intake air and guided between the peripheral wall of the case and the separation plate. And it is discharged to the outside of the air cleaner through the discharge valve.

Japanese Utility Model Publication No. 5-30456

  By the way, in the case of the air cleaner of patent document 1, it is supposed that the case has a double tube structure of a peripheral wall and a separation wall. Therefore, the problem that the process of shape | molding a case using a shaping | molding die becomes complicated.

  An object of the present invention is to provide a cylindrical air cleaner capable of separating and removing foreign matters such as relatively large dust and water contained in intake air with a simple configuration.

  To achieve the above object, a cylindrical air cleaner includes a cylindrical first housing having a peripheral wall formed with an inlet, a bottom wall, a peripheral wall, and a bottom wall formed with an outlet. 2 housing, and a cylindrical filter element provided inside the first housing and the second housing, the second housing being inserted into the first housing, The peripheral wall of the first housing and the peripheral wall of the second housing form a double pipe structure, and the peripheral wall of the second housing is disposed to face the opening of the inlet, and the opening of the peripheral wall of the first housing A seal portion that seals between the first housing and the second housing is formed at the end, and a discharge portion is formed at a lower portion of the peripheral wall of the first housing. It is.

  According to this configuration, the intake air introduced into the air cleaner through the inlet flows between the peripheral wall of the first housing and the peripheral wall of the second housing toward the filter element. The dust contained in the intake air is captured when passing through the filter element, and the intake air that has passed through the filter element is led out through the outlet.

  On the other hand, foreign substances such as relatively large dust and water are introduced into the air cleaner through the inlet together with the intake air, but most of these foreign substances collide with the peripheral wall of the second housing by going straight by inertia force. The foreign matter colliding with the peripheral wall falls along the outer peripheral surface of the peripheral wall, and is discharged to the outside of the air cleaner through a discharge portion formed at the lower portion of the peripheral wall of the first housing.

  As described above, according to the above configuration, since the double pipe structure is configured by the peripheral wall of the first housing and the peripheral wall of the second housing, foreign substances such as dust and water contained in the intake air by the peripheral wall of the second housing. Can be separated.

  According to the present invention, foreign matters such as relatively large dust and water contained in the intake air can be separated and removed with a simple configuration.

The perspective view of an air cleaner about one embodiment of a cylindrical air cleaner. FIG. 2 is a cross-sectional view of the air cleaner taken along line 2-2 in FIG. 1. It is sectional drawing of the same air cleaner as FIG. 2, Comprising: The figure explaining the effect | action of the same embodiment. Sectional drawing of the air cleaner of a modification. Sectional drawing of the air cleaner of another modification.

Hereinafter, an embodiment will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the cylindrical air cleaner (hereinafter, air cleaner 10) is formed of a hard resin material and has a cylindrical shape, the first housing 20 and the second housing 30, and the first housing 20 and And a filter element 50 having a cylindrical shape (also referred to as chrysanthemum shape) provided inside the second housing 30.

  The first housing 20 has a cylindrical peripheral wall 21 and a bottom wall 22 formed at one end of the peripheral wall 21 (the right end in FIG. 2). The diameter of the peripheral wall 21 is reduced from the opening 23 toward the bottom wall 22. Further, a cylindrical inlet 25 is formed on the upper portion of the peripheral wall 21 so as to protrude upward. An inlet duct (not shown) is connected to the inlet 25.

  The second housing 30 has a cylindrical peripheral wall 31 and a bottom wall 32 formed at one end of the peripheral wall 31 (left end in FIG. 2). The peripheral wall 31 is reduced in diameter from the opening 33 toward the bottom wall 32. A cylindrical outlet 35 is formed at the center of the bottom wall 32 so as to protrude outward in the axial direction.

  As shown in FIG. 2, the peripheral wall 31 of the second housing 30 is inserted through the opening 23 into the peripheral wall 21 of the first housing 20, and the peripheral walls 21, 31 are arranged coaxially. Therefore, the double wall structure is constituted by the peripheral wall 21 of the first housing 20 and the peripheral wall 31 of the second housing 30.

  Here, the bottom wall 22 of the first housing 20 is orthogonal to the axial direction, whereas the opening end 34 of the peripheral wall 31 of the second housing 30 is lower in the vertical direction toward the bottom wall 22 of the first housing 20. It inclines so that it may space apart from.

The upper outer peripheral surface of the peripheral wall 31 of the second housing 30 faces the opening 26 of the inlet 25 in the radial direction.
A discharge portion 28 is formed on the lower portion of the peripheral wall 21 of the first housing 20 so as to protrude downward. The discharge portion 28 is formed adjacent to the flange portion 29 and faces the outer peripheral surface of the peripheral wall 31 of the second housing 30 in the radial direction. Note that a dust cup DC that opens and closes due to vehicle vibration or the like is attached to the discharge unit 28.

  As described above, the peripheral walls 21 and 31 are reduced in diameter toward the bottom walls 22 and 32, respectively. Accordingly, the lower portion of the inner peripheral surface 27 of the first housing 20 is inclined downward from the bottom wall 22 toward the discharge portion 28. Further, the lower part of the inner peripheral surface 37 of the second housing 30 is inclined downward from the bottom wall 32 toward the opening end 34.

  A flange portion 29 is formed over the entire periphery of the open end 24 of the peripheral wall 21 of the first housing 20. Further, a disc-shaped flange portion 39 that is opposed to the flange portion 29 in the axial direction is integrally formed on the peripheral wall 31 of the second housing 30. An annular seal member 41 is sandwiched between the flange portion 39 and the flange portion 29 of the first housing 20. The flange portions 29 and 39 and the seal member 41 form a seal portion 40 that seals between the first housing 20 and the second housing 30.

The filter element 50 is provided between the bottom wall 22 of the first housing 20 and the bottom wall 32 of the second housing 30.
The filter element 50 includes a filter medium 51 formed by folding a rectangular filter paper or a non-woven fabric into a cylindrical shape. That is, the filter medium 51 is folded in a folding line extending along the axial direction of the filter element 50.

Next, the operation of this embodiment will be described.
As indicated by thin arrows in FIG. 3, the intake air introduced from the opening 26 into the air cleaner 10 through the inlet 25 passes between the peripheral wall 21 of the first housing 20 and the peripheral wall 31 of the second housing 30. It flows toward the filter element 50. The dust contained in the intake air is captured when passing through the filter medium 51 of the filter element 50, and the intake air that has passed through the filter element 50 is led out of the air cleaner 10 through the outlet 35.

  On the other hand, as shown by thick arrows in FIG. 3, foreign matter FM such as relatively large dust or water is also introduced into the air cleaner 10 from the opening 26 through the inlet 25 together with the intake air. Most of such foreign matter FM is inertial. It will collide with the peripheral wall 31 of the 2nd housing 30 by going straight by force. The foreign object FM colliding with the peripheral wall 31 falls along the outer peripheral surface of the peripheral wall 31 and enters the discharge portion 28 formed at the lower portion of the peripheral wall 21 of the first housing 20. When the dust cup DC is opened due to vehicle vibration or the like, the foreign matter FM in the discharge unit 28 is discharged to the outside of the air cleaner 10.

According to the cylindrical air cleaner according to the present embodiment described above, the following effects can be obtained.
(1) The second housing 30 is inserted into the first housing 20, and the peripheral wall 21 of the first housing 20 and the peripheral wall 31 of the second housing 30 form a double tube structure and the second housing 30. The peripheral wall 31 is disposed to face the opening 26 of the inlet 25. A seal portion 40 that seals between the first housing 20 and the second housing 30 is formed at the opening end portion 24 of the peripheral wall 21 of the first housing 20. 28 is formed.

  According to such a configuration, a double pipe structure is configured by the peripheral wall 21 of the first housing 20 and the peripheral wall 31 of the second housing 30, so that dust, water, etc. contained in the intake air by the peripheral wall 31 of the second housing 30. The foreign matter FM can be separated. Accordingly, a relatively large foreign matter FM such as dust or water can be separated and removed with a simple configuration.

  (2) The inlet 25 is formed at the upper part of the peripheral wall 21 of the first housing 20, and the lower part of the open end 34 of the peripheral wall 31 of the second housing 30 is separated from the bottom wall 22 of the first housing 20 rather than the upper part. ing.

  In other words, the closer the opening end 34 of the peripheral wall 31 of the second housing 30 and the bottom wall 22 of the first housing 20 are arranged, in other words, the opening end 34 of the peripheral wall 31 of the second housing 30 and the first housing 20. There is a possibility that the ventilation resistance of the air cleaner 10 increases as the gap between the bottom wall 22 of the air cleaner 10 is reduced.

  In this regard, according to the above configuration, the upper portion of the peripheral wall 31 of the second housing 30 is opposed to the inlet 25 of the first housing 20 while the lower portion is spaced from the bottom wall 22 of the first housing 20 by an upper distance. Than can be secured. For this reason, it is possible to suppress an increase in ventilation resistance due to a decrease in the gap between the open end 34 of the peripheral wall 31 of the second housing 30 and the bottom wall 22 of the first housing 20.

  (3) The discharge portion 28 is provided to face the peripheral wall 31 of the second housing 30. For this reason, the peripheral wall 31 suppresses the filter element 50 from sucking foreign matter FM such as dust or water that has entered the discharge portion 28. Therefore, it is possible to suppress the deterioration of the filter element 50 due to the suction of foreign matter FM such as dust or water.

  (4) The lower part of the inner peripheral surface 27 of the first housing 20 is inclined downward from the bottom wall 22 of the first housing 20 toward the discharge part 28. For this reason, as shown by a two-dot chain line in FIG. 3, the foreign matter FM accumulated in the lower portion of the inner peripheral surface 27 of the first housing 20 flows down toward the discharge portion 28 by its own weight. Therefore, foreign substances can be guided toward the discharge unit 28.

  (5) The lower part of the inner peripheral surface 37 of the second housing 30 is inclined downward from the bottom wall 32 of the second housing 30 toward the opening end 34. For this reason, as shown by a two-dot chain line in FIG. 3, foreign matter FM that enters the inside of the peripheral wall 31 of the second housing 30 and accumulates in the lower portion of the inner peripheral surface 37 flows down toward the opening end 34 by its own weight. Then, it falls from the opening 33 of the second housing 30 to the lower portion of the inner peripheral surface 27 of the first housing 20 where the discharge portion 28 is formed. Therefore, foreign substances can be guided toward the discharge unit 28.

<Modification>
In addition, the said embodiment can also be changed as follows, for example.
The inner diameter of the peripheral wall 21 of the first housing 20 can be set to be the same in the axial direction. Further, the inner diameter of the peripheral wall 31 of the second housing 30 can be set to be the same in the axial direction.

As shown by a two-dot chain line in FIG. 2, the shape of the peripheral wall 31 of the second housing 30 can be changed so as not to face the discharge portion 28 in the radial direction.
As shown in FIG. 4, the distance between the open end 34 of the peripheral wall 31 of the second housing 30 and the bottom wall 22 of the first housing 20 can be set to be the same over the entire circumferential direction. In this case, for example, as shown in FIG. 5, a plurality of through holes 38 can be formed in the peripheral wall 31 of the second housing 30. In this case, a part of the intake air that flows between the peripheral wall 21 of the first housing 20 and the peripheral wall 31 of the second housing 30 toward the filter element 50 flows into the second housing 30 through the through hole 38. For this reason, it is possible to suppress an increase in ventilation resistance due to the restriction of the intake flow path by the peripheral wall 31 of the second housing 30. In addition, it is preferable not to form the said through-hole 38 in the part which opposes the opening 26 of the inlet 25 in radial direction among the surrounding walls 31, and the part which opposes the discharge part 28 in radial direction. This is to prevent foreign matter FM such as dust or water from flowing into the peripheral wall 31 through the through hole 38.

  -The 1st housing 20 and the 2nd housing 30 can also be changed into what makes an elliptical cylinder shape or a long cylindrical shape.

  DESCRIPTION OF SYMBOLS 10 ... Air cleaner, 20 ... 1st housing, 21 ... Perimeter wall, 22 ... Bottom wall, 23 ... Opening, 24 ... Opening end part, 25 ... Inlet, 26 ... Opening, 27 ... Inner peripheral surface, 28 ... Discharge part, 29 ... Flange portion, 30 ... second housing, 31 ... peripheral wall, 32 ... bottom wall, 33 ... opening, 34 ... opening end, 35 ... outlet, 37 ... inner peripheral surface, 38 ... through hole, 39 ... flange portion, 40 ... seal 41, sealing member, 50 ... filter element, 51 ... filter medium, DC ... dust cup.

Claims (5)

A cylindrical first housing having a peripheral wall formed with an inlet and a bottom wall;
A cylindrical second housing having a peripheral wall and a bottom wall formed with an outlet;
A cylindrical filter element provided inside the first housing and the second housing;
In a cylindrical air cleaner with
The second housing is inserted into the first housing, and a double tube structure is formed by the peripheral wall of the first housing and the peripheral wall of the second housing, and the peripheral wall of the second housing is the inlet. Arranged opposite the opening of
A seal portion that seals between the first housing and the second housing is formed at an opening end of the peripheral wall of the first housing,
A discharge part is formed at the lower part of the peripheral wall of the first housing.
Tubular air cleaner. The inlet is formed in an upper portion of the peripheral wall of the first housing;
Of the opening end of the peripheral wall of the second housing, the lower part is separated from the bottom wall of the first housing rather than the upper part.
The cylindrical air cleaner according to claim 1. The discharge portion is provided to face the peripheral wall of the second housing;
The cylindrical air cleaner according to claim 1 or 2. The lower part of the inner peripheral surface of the first housing is inclined downward from the bottom wall of the first housing toward the discharge part.
The cylindrical air cleaner as described in any one of Claims 1-3. The lower part of the inner peripheral surface of the second housing is inclined downward from the bottom wall of the second housing toward the opening end.
The cylindrical air cleaner as described in any one of Claims 1-4.