JPH042288B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air cleaner used in internal combustion engines and the like.

[Conventional technology]

Conventionally, as this type of air purifier, an air purifier using an axial flow filter element is known, for example, as described in Japanese Patent Publication No. 54-11947.

According to such an air purifier, the axial flow type filtration element has weak strength in the radial direction due to its configuration.
Therefore, in order to prevent non-clean air from colliding directly with the side surface of the filtration element, the air intake port is provided at a position away from the side surface of the filtration element, as in the above-mentioned known example.

However, by locating the air intake in a position that avoids the side of the filtration element,
There is a problem in that the size of the case itself increases.

Therefore, as seen in Japanese Utility Model Publication No. 53-1656, it has been known that a non-ventilated inner cylinder is placed on the side of the filter element.
It is conceivable to apply such a configuration to the former air purifier.

[Problem to be solved by the invention]

However, although it is possible to position the air intake all the way to the side of the filtration element, the axial flow type filtration element, due to its configuration, allows air to flow in the axial direction, so the air inlet and air outlet are This requires a relatively large amount of empty space in the front of the side, which leads to an increase in the size of the case itself and, by extension, the air purifier.

The present invention has been devised in view of this point, and is intended to avoid increasing the size of the air cleaner.

[Means to solve the problem]

The present invention has a ring shape as a whole, and has a configuration in which air flows in the axial direction, and the air inflow side and the air outflow side are formed into inclined surfaces that slope upward in the radial direction from the axis. a cylindrical case that accommodates the filter element; a cylindrical case that is provided on the cylindrical side surface of the case so as to face the ring-shaped side surface of the filter element; An air intake port for introducing clean air, and a non-porous wall portion attached to a ring-shaped side surface of the filtration element and corresponding to the ring-shaped side surface, and corresponding to the air inflow side of the filtration element. A protector member having an opening at a portion thereof is formed between the protector member and the inside of the cylindrical side surface of the case, one end side communicating with the air intake port, and the other end side communicating with the air inflow port of the filtration element. a communication path that communicates with the air flow in a substantially radial direction of the filtration element; an air intake port for taking out clean air, and an inclined surface on the air outflow side of the filtration element allows a space between the inclined surface and the air intake port to become deeper toward the axis of the filtration element. A substantially triangular cavity is formed, and the air flow from the air intake port through the communication path in a substantially radial direction of the filtration element collides with an inclined surface on the air inflow side of the filtration element. It is something.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to specific examples. 1 to 3, reference numeral 1 denotes an intake pipe forming an air intake port, and the intake pipe 1 is disposed in a tangential direction of a cap 2 and is fixed by welding. 3 is a dust pan. A ring body 5 is sandwiched between the dust pan 3 and the cap 2 with a seal ring 4 interposed therebetween. The ring body 5 has a cone-shaped longitudinal section, and has a conical surface 5 inclined toward the center of the dust pan 3.
a and a circular opening 5b. 6 is a dust chamber. Reference numeral 7 denotes an axial flow filter element, and the element 7 has the configuration shown in FIG.

That is, the filtration element 7 has a ring-shaped filtration part 20 as a whole, and is configured to allow air to flow in the axial direction of the filtration part 20. Further, the air inflow side and the air outflow side of the filter section 20 are formed into inclined surfaces 20a and 20b that are inclined upward in the radial direction from the axis. The filter section 20 is fixed to a ring-shaped end plate 22. The end plate 22 has a groove 22e on its outer periphery, and a cylindrical portion 22b on its inner periphery with a hole 22c in the center for passing the bolt 11 shown in FIG. A groove 22e is formed in the cylindrical portion 22b. Further, the outer peripheral side and the inner peripheral side of the end plate 22 are connected by a plurality of radial support columns 22d, and an opening 22a is formed between the plurality of radial support columns 22d. The filtration part 20 has its center passed through the cylindrical part 22b of the end plate 22, and its innermost circumferential side is connected to the groove 22e around the cylindrical part 22b via adhesive 23, and its outermost circumferential side is connected to the groove 22e around the cylindrical part 22b. Adhesive 2 is placed inside the groove 22e on the outer periphery of the end plate 22.
3.

As understood from FIG. 1, the support column 22d of the end plate 22 is oriented toward the axis of the filter section 20 and inclined downward to correspond to the slope of the slope surface 20b on the air outflow side of the filter section 20. It is configured as follows.

14 is a protector member, and the protector member 1
4 is attached to the ring-shaped side surface of the filter section 20 of the filter element 7. As can be seen from FIGS. 1 and 3, the protector member 14 is connected to the filter section 20.
A non-porous wall portion 14 is formed at a portion corresponding to the ring-shaped side surface of the
a, and a lid portion 15 conically narrowed along the inclined surface 20a on the air inflow side of the filtration part 20 at a portion corresponding to the air inflow side of the filtration part 20. A plurality of small holes 15a are formed in the lid portion 15. Note that an opening 16 is formed in the center of the lid portion 15 of the protector member 14.

The end portion of the protector member 14 is bonded within the groove 22e of the outer peripheral portion of the end plate 22 with an adhesive 23, so that it is integrated with the filter element 7.

The filtration element 7 equipped with the protector member 14 having the above structure is assembled with the bolt 11 and the wing nut 13.
It is fixed above the cap 2 via. A seal ring 8 seals between the filter element 7 and the cap 2. The bolt 11 is clamped and fixed between support plates 10, 10 which are welded and fixed to the discharge pipe 9. Further, the cap 2 and the dust pan 3 are attached by fittings at appropriate locations on the annular portion indicated by X in the figure, and the cap 2 and the dust pan 3 can be separated by removing the fittings.

A communication passage 30 is formed between the protector member 14 and the inside of the cylindrical side surface of the cap 2.
One end of the communication passage 30 communicates with the intake pipe 1, and the other end communicates with the inclined surface 20a on the air inflow side of the filtration section 20, and allows air flow to flow approximately in the radial direction of the filtration section 20. It acts as if it were flowing.
In addition, the air flow heading in the substantially radial direction of the filter section 20 through the communication path 30 collides with the inclined surface 20a of the filter section 20 on the air inflow side.

By the way, in the area on the air outflow side of the filtration part 20, as can be understood from FIG. A cavity 40 is formed which becomes deeper toward the axis of the shaft 20.

The filter section 20 of the filter element 7 is manufactured as follows. That is, the fan-shaped filter medium 17 shown in FIG. 5 is used. The filter medium 17 has a plurality of arcuate creases m-- between the arc l-l' at one end and the arc v-v' at the other end.
m', n-n', . . . u-u' are provided. Here, adjacent circular arcs n-n' and o-o', p-p' and q-q', r
−r′ and s−s′, t−t′ and u−u′ are the same,
Another adjacent circular arcs m-m' and n-n', o-o' and p-
The intervals between p', q-q' and r-r', and s-s' and t-t' are made larger than the previous circular arc intervals, and they are the same. Also, the distance between the arcs l-l' and m-m' is made larger than the distance between the arcs n-n' and o-o',
The distance between the arcs u-u' and v-v' is greater than the distance between the arcs m-m' and n-n'.

The filter medium 17 is bent along these creases so that the longitudinal section has a continuous waveform, and the whole is curved so that the arc 1-l' is on the inner circumference and the arc v-v' is on the outer circumference. By bonding both side edges of the filter medium 17 to each other with an adhesive 19, a substantially conical filter section 20 as shown in FIG. 6 is obtained.

In the above configuration, the operation will be explained next. Unclean air entering the cap 2 from the intake pipe 1 travels in the direction of the arrow and collides with the inclined surface 20a of the filter section 20 through the communication path 30. On the other hand, before the collision, the airflow is swirled by the action of the conical surface 5a of the ring body 5, and relatively large dust particles are separated by the swirling. The dust flows into the dust chamber 6 through the opening 5b. The dust accumulated in the dust chamber 6 can be removed by removing the dust pan 3 from the cabinet 2.
Discard.

The airflow colliding with the inclined surface 20a of the filter section 20 passes through the filter section 20 in the axial direction, and small dust particles are captured by the filter section 20.

In this way, the purified air passes through the cavity 40 on the air outlet side of the filter section 20, passes through the exhaust pipe 9, and is drawn into the internal combustion engine.

By the way, in the above embodiment, since the protector part 14 is attached to the outer periphery of the over-element, even if the flow of non-clean air enters from the intake pipe 1 and collides with the outer peripheral surface of the over-emerent 7, the above-mentioned The flow impinges on the protector portion 14, and therefore the outer portion 20 of the outer element 7
is not deformed. As shown in FIG. 6, the cover portion 20 has a structure in which a plurality of concentric rows of corrugated sections exist in a concentric manner, and the corrugated portion is easily deformed by an external force in the radial direction with respect to the axis of the cover portion 20. I understand. Therefore, attaching the protector member 14 has a great effect.

Furthermore, by attaching the protector member 14, the following effects can be obtained in addition to the above-mentioned effects. That is, since the axial flow type filter element 7 literally allows non-clean air to flow in the axial direction of the element 7, both ends of the filter element 7 must be opened, and for this reason, the filter element 7 must be supported as shown in Fig. 1, for example. Must be.
Therefore, if you hold the outer periphery of the element 7 with your hand when cleaning the over-element 7, the over-portion 20 will often be damaged.
A load is applied to the joint between the end plate 22 and the end plate 22, and there is a risk that the over portion 20 may be torn.

However, by attaching the protector member 14,
When cleaning the filter element 7, remove the protector part 1.
4 in your hand, and you can avoid the problems mentioned above. The filter element 7 can be cleaned by blowing air in the axial direction of the filter part 20.

Furthermore, according to the cyclone air cleaner as in the above embodiment, the dust contained in the non-clean air flowing in from the intake pipe 1 is attached to the filter part 20 of the filter element 7 due to the inertial force during the inflow. Although this will reduce the cyclone efficiency, the protector member 14 can eliminate this problem.

As shown in FIG. 7, one side of the material 17 is formed into a wavy shape, the other side is formed into a flat plate shape, and the border of the material 17 is bent and wound into a spiral shape to form a cover portion 20. Note that air flows as shown in FIG.
In the figure, 17a is a flat plate part, 17b is a corrugated part, and 2
4 is an adhesive.

Note that the present invention is not limited to the embodiments described above, and various modifications can be made as follows.

(1) The protector member 14 may be made of metal.

(2) Of course, the lid portion 15 of the protector member 14 may be omitted.

(3) The cover portion 20 of the cover element 7 may have any structure as long as it allows air to flow in the axial direction thereof, and is therefore not limited to the structure of the cover portion 20 described above. For example, the material as a starting material constituting the cover portion 20 may be constructed using a trapezoidal material 17 as shown in FIG. 9 in addition to the material shown in FIG.
Alternatively, a triangular member may be used. Furthermore, in addition to configuring the material by bending it, the material can be formed by pressing, or the axial flow type overpart can be constructed in the papermaking process. Alternatively, the upper part of the structure disclosed in Japanese Utility Model Publication No. 56-51937 may be used.

(4) The present invention can be applied not only to the cyclone type air cleaner in each of the above-mentioned embodiments but also to a general engine air cleaner that does not use the cyclone type.
Furthermore, it can of course be applied to air purifiers for air conditioning as well as for engines.

〔Effect of the invention〕

As described above, the effects of the present invention are listed as follows.

(a) The protection member can prevent damage to the ring-shaped side surface of the axial flow filtration element due to direct collision of non-clean air with the element.

(b) The air inflow side and the air outflow side of the axial flow type filtration element are formed into inclined surfaces radially oriented upward from the axis of the axial flow type filtration element, and the air inflow side and the air outflow side of the axial flow type filtration element are formed into slopes that slope upward in the radial direction from the axis, and the air is Since the configuration is configured such that the air flow directed in the approximately radial direction collides with the inclined surface on the air inflow side of the filter element, a large space is provided in front of the air inflow side in order to guide the air flow to the air inflow side of the filter element. It is possible to reliably guide the air flow to the entire air inflow side without requiring a

In addition, the air outlet side of the filtration element has a space formed between the inclined plane and the air outlet, which becomes deeper as it goes toward the axis of the filtration element. Airflow can be reliably exhausted without requiring a large space in front of the vehicle.

Therefore, it is possible to minimize the space on the air inflow side and the air outflow side created by employing the axial flow type filtration element, and it is possible to avoid increasing the size of the entire air purifier.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the air purifier according to the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a sectional view showing the protector member of FIG. 1, and FIG. is a perspective view showing the axial flow type filtration element of FIG. 1;
5 and 6 are diagrams used to explain the manufacturing process of the filtration section of the filtration element shown in FIG. 4. FIG. 5 is a developed view of the filter medium, FIG. 9 to 9 show other embodiments of the filtration element according to the present invention, FIG. 7 is a perspective view for explaining the manufacturing process of the filtration element, and FIG. 8 is an enlarged view of the main part of FIG. 7. FIG. 9 is a perspective view showing a modification of FIG. 5. DESCRIPTION OF SYMBOLS 1... Intake pipe, 2... Cap, 7... Filtration element, 9... Discharge pipe, 14... Protector member, 20... Filtration part, 20a, 20b... Inclined surface, 30... Communication path, 40 ...Empty space.

Claims (1)

[Scope of Claims] 1. The structure has a ring shape as a whole and allows air to flow in the axial direction, and the air inflow side and the air outflow side are inclined upward in the radial direction from the axis. an axial flow type filtration element formed on a surface; a cylindrical case housing the filtration element; a cylindrical case provided on a cylindrical side surface of the case so as to face a ring-shaped side surface of the filtration element; an air intake port for introducing non-clean air into the filtration element; and an air inlet port attached to a ring-shaped side surface of the filtration element and having a non-porous wall portion at a portion corresponding to the ring-shaped side surface; a protector member having an opening at a portion corresponding to the filtration element; and a protector member formed between the protector member and the inside of the cylindrical side surface of the case, one end communicating with the air intake port and the other end communicating with the filtration element. a communication path that communicates with the air inflow side and allows air to flow in a substantially radial direction of the filtration element; a communication path that is provided above the case so as to face the air outflow side of the filtration element; an air intake port for taking out clean air flowing out from the filtration element, and an inclined surface on the air outflow side of the filtration element causes a gap between the inclined surface and the air intake port toward the axis of the filtration element. A cavity is formed that becomes deeper as the airflow increases, and the air flow is configured such that an air flow from the air intake port, through the communication path, and heading in a substantially radial direction of the filtration element collides with an inclined surface on the air inflow side of the filtration element. An air purifier characterized by: