JP2003184668A - Cyclone air cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cyclone air cleaner that can obtain higher dust collection efficiency than a conventional one. <P>SOLUTION: In this cyclone air cleaner including a filter element, a cleaner case that contains and holds the filter element and that has element containing room with an opening at one end, a case cover 40 mounted on the cleaner case by covering the opening, and a dust cover 80 mounted inside the case cover, dust cover support ribs 42 and plate-like dust cover mounting guides 44 are provided. Each of the ribs 42 is placed on the inner bottom surface of the case cover 40 and has a shape of blade curved in the same direction as that of the flow of swirl air flow. Each of the guides 44 extends vertically from the inner bottom surface of the case cover 40 and inclines to the same direction of that of the flow of the swirl air flow within the element containing room against the tangent direction of a peripheral surface of the dust cover 80 and is in contact with the peripheral surface of the dust cover 80. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner used in an engine or the like and having a filter element for removing dust in intake air thereof, and more particularly to an air cleaner adopting a cyclone system.

[0002]

2. Description of the Related Art For example, as a countermeasure when an engine is used in a dusty area or the like, the dust-laden air is swirled before the dust in the intake air is removed by a filter element, and the centrifugal force generated by the swirling is utilized. It has been conventionally known to use a cyclone type air cleaner in which dust having a relatively large mass is removed in advance and then the dust is removed by a filter element.

The cyclone type air cleaner has a cylindrical cleaner case having an element accommodating space surrounded by a cylindrical inner peripheral surface, a filter element inserted and held in the element accommodating space, and an opening of the cleaner case. Some of them are composed of a cylindrical case cover attached to the cleaner case to cover the end portion and a cylindrical dust cover attached to the inside of the case cover. According to the cyclone type air cleaner configured as described above, a relatively large mass of dust is thrown out by the centrifugal force generated when the air introduced into the cleaner case from the air inlet swirls, and the inner circumference of the cleaner case is discharged. It falls downward along the surface due to gravity and enters the dust capturing space formed between the case cover and the dust cover.
Then, the dust having a relatively large mass that has entered the dust capturing space is discharged to the outside of the air cleaner by removing the case cover from the cleaner case. In this way, after the relatively large dust in the air taken in from the inlet passage is removed, the dust in the air is removed by passing through the filter element, and the cleaned air passes through the outlet passage. Supplied to the engine.

[0004]

However, the dust having a relatively large mass in the air is thrown out by the centrifugal force when the air introduced into the cleaner case from the air inlet swirls, and the dust in the cleaner case is discharged. Since it falls downward along the inner peripheral surface due to gravity, relatively large dust accumulates in the dust trapping space unevenly along the inner peripheral surface of the case cover, and the central portion of the dust trapping space becomes the dust trapping space. Difficult to use. Therefore, when the part along the inner surface of the case cover in the dust trap space is filled with relatively large dust, remove the case cover from the cleaner case and discharge the relatively large dust to the outside of the air cleaner. It is necessary to let Therefore, the number of times that the case cover is removed from the cleaner case and the dust having a relatively large mass is discharged to the outside of the air cleaner more than necessary, and there is a problem that the dust collection efficiency is reduced.

The present invention has been made in view of such a problem, and the central portion of the dust capturing space can also be used as the dust capturing space, so that a higher dust collecting efficiency can be obtained as compared with the conventional one. It is intended to provide a cyclone type air cleaner that can be used.

[0006]

In order to achieve such an object, in the present invention, a cylindrical filter element and a bottomed cylindrical element accommodating space having an opening at one end are provided. A cleaner case having a filter element accommodated therein and held therein, and an air inlet provided at a position where a swirling air flow is generated in the element accommodation space, and an air outlet provided for discharging purified air passing through the filter element. When,
In a cyclone-type air cleaner equipped with a cylindrical case cover that covers the opening and is attached to the cleaner case, and a cylindrical dust cover that is attached inside the case cover, the case cover has a dust cover on the inner bottom surface of the case cover. It is provided to support the bottom,
A dust cover support rib having a blade shape bent in the same direction as the flow direction of the swirling air flow in the element housing space from the outside of the inner bottom surface of the case cover toward the center, and extending vertically from the inner bottom surface of the case cover, A plate shape that is inclined to the same direction as the flow direction of the swirling air flow in the element housing space with respect to the tangential direction of the outer circumference of the dust cover and contacts the outer peripheral surface of the dust cover and holds the outer peripheral surface of the dust cover. And a dust cover mounting guide.

According to this structure, the dust cover supporting rib has a vane shape that is bent from the outside of the inner bottom surface of the case cover toward the center in the same direction as the flow direction of the swirling air flow in the element accommodating space. Since the dust trapping space and the element storage space are connected, the air in the dust trapping space also swirls in the same direction as the swirling air flow in the element storage space. Of large dust is guided to the center of the inner bottom surface of the case cover, that is, the center of the bottom of the dust trapping space, by the swirling airflow in the dust trapping space along the dust cover supporting ribs. Further, since the dust cover mounting guide is inclined in the same direction as the flow direction of the swirling air flow in the element housing space with respect to the tangential direction of the outer circumference circle of the dust cover, the dust having a relatively large mass that has entered the dust trapping space. Are similarly guided to the center of the bottom of the dust trap space along the dust cover mounting guide by the swirling air flow in the dust trap space. Therefore, relatively large mass of dust is evenly accumulated in the dust capturing space, and the entire space can be used as the dust capturing space, so that a large amount of relatively large mass of dust can be accumulated at one time. It is possible to reduce the number of times that the cover is detached from the cleaner case to discharge dust having a relatively large mass to the outside of the air cleaner, and it is possible to obtain higher dust collection efficiency as compared with the conventional cyclone type air cleaner.

Further, when the dust cover is attached inside the case cover so as to be eccentric with the axis of the case cover, the dust cover is provided with a convex portion on the outer periphery thereof, and the dust cover mounting guide is attached to the dust cover. It is preferable to provide a receiving portion for receiving the convex portion so as to perform attachment positioning with respect to the rotation direction. With this configuration, when the dust cover is attached to the inside of the case cover, the dust cover can be easily attached and positioned in the rotation direction, and the dust cover is not attached in the wrong direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 is a partial sectional front view showing an embodiment of an air cleaner according to the present invention, FIG. 2 is a partial sectional right side view thereof, FIG. 3 is a partial sectional left side view thereof, and FIG. 4 is a partial sectional plan view thereof. . In addition, FIG.
6 is a sectional view taken along line V-V in FIG. 6, FIG. 6 is a sectional view taken along line VI-VI in FIG. 2, and FIG.
It is the bottom view seen from I. FIG. 8 is an exploded perspective view of this air cleaner.

As shown in FIG. 8, the present air cleaner 1 includes a cleaner case 10 and a cylindrical filter element 60 housed and held in the cleaner case 10.
An inlet pipe 70 that is detachably attached in the cleaner case 10 and serves as a water separating member is configured. Here, the cleaner case 10 includes a case body 20, an upper cover 30 which is detachably attached to an upper portion of the case body 20, and a case cover 40 which is detachably attached to a lower portion of the case body 20.
The side cover 50 is detachably attached to the side of the case body 20.

The case body 20 of the cleaner case 10 is formed in a vertically long cylindrical shape at the center thereof, and a cylindrical element accommodating space ES for accommodating the filter element 60 is formed therein ( (See FIGS. 5 and 6). A circular upper opening 21 is formed in the center of the upper wall 21 of the case body 20 that constitutes the element housing space ES.
a is formed (see FIG. 8), and the upper opening 21a is formed.
From there is provided a cylindrical communication pipe 22 extending downward (see FIG. 5). Further, a hollow water reservoir half 23 is formed on the front side of the element housing space ES, and an inlet 24 which is an air inlet is provided so as to horizontally project from the right wall 23a thereof. There is. At the upper part of the inner wall 23b of the water tank half body 23, the element housing space ES
An air inflow window 25 that is connected to
The air that has flowed in from 4 enters the element accommodation space ES through the air inflow window 25.

The side cover 50 constituting the element case 10 is detachably attached to the front of the above-mentioned water tank half body 23 formed in the case body 20, and the side cover 50 is attached to the case body 20. In this state, the water storage tank half 23 and the side cover 50 form a water storage tank and a water storage space WS is formed therein (see FIGS. 4, 5 and 6). A water draining hole is provided in the lower portion of the water tank half body 23, and an unloader valve 91 for draining water is attached to the water draining hole (FIGS. 2, 7, and 8).
reference).

FIG. 9 shows a perspective view of the inlet pipe 70. The base portion 71 of the inlet pipe 70 is formed in a substantially cylindrical shape and extends in the horizontal direction. Ear portions 72, 72 for attaching the main inlet pipe 70 to the case body 20 are provided at the upper and lower portions thereof so as to project vertically. Has been. The inner surface of the base 71 located on the case body 20 side is formed into a cylindrical curved surface on the air inlet side (inlet 24 side), but is formed substantially flat on the air outlet side (air inflow window 25 side). In addition, an air guide portion 73 is provided that extends to the air outlet side. Also,
A moisture guide portion 74 is provided below the air guide portion 73 so as to project substantially horizontally toward the air outlet side, and the tip portion thereof is formed in a sharpened shape. Further, the moisture guide portion 74 is provided on the side opposite to the air guide portion 73 (side cover 50).
Notch 75 extending toward the inlet 24 between the air guide portion 73 and the moisture guide portion 74.
Is provided.

As shown in FIG. 8, upper and lower projections 26, 26 for mounting the inlet pipe 70 are provided at the upper and lower positions of the air inflow window 25 formed in the case main body 20. 26, holes 72a formed in the upper and lower ears 72, 72 of the inlet pipe 70,
The inlet pipe 70 can be attached to the case main body 20 by inserting the push nuts N, N at the ends of the protrusions 26, 26 after penetrating 72a. As described above, the inlet pipe 70 of the air cleaner 1 is attachable to and detachable from the case body 20.

As shown in FIGS. 5 and 6, the filter element 60 used in the present air cleaner 1 is a filter paper 62 made of a non-woven fabric folded in a bellows shape on the outer circumference of a base 61 made of a cylindrical shell having a large number of holes. Is attached so as to be wound, and the upper and lower ends thereof are held by disk-shaped fixing caps 63 and 64. An air discharge port 61a, which is a circular hole having an inner circumference slightly larger than the outer circumference of the base 61, is provided at the center of the upper fixed cap 63, and the air discharge port 61a is outwardly directed upward. A cylindrical seal member 65 having an open conical lip portion 65a is attached. Further, the fixed cap 6 located below the filter element 60
A dust cover installation member 66 having a trapezoidal cross section is provided on the lower surface side of No. 4.

The filter element 60 is a cylindrical dish-shaped dust cover 80 that opens upward as shown in FIGS.
With the lower part held by, the case cover 20 is inserted and attached from the lower part of the case main body 20, and a cylindrical dish-shaped case cover 40 opened upward so as to further hold the dust cover 80 from below is attached to the lower part of the case main body 20. It A ring-shaped groove 81 having a trapezoidal cross section is formed on the bottom surface of the dust cover 80, and when the dust cover 80 is attached to the lower portion of the filter element 60, the dust cover installation member 66 below the filter element 60. Is to be inserted from above. Also, the dust cover 8
A ring-shaped gasket holding portion 82 is provided on the outer peripheral portion of 0 so as to project outward, and a ring-shaped gasket 83 is attached to this gasket holding portion 82 (FIGS. 5 and 8). reference). When this gasket is installed in the case body 20, the case body 20
It closely adheres to the inner wall of the casing and maintains the airtightness between the dust cover 80 and the inner surface of the case body 20.

Three clamps 43, 43, 43 which are swingably attached are attached to the outer peripheral portion of the case cover 40, and these clamps 43, 43, 43 are provided at the lower part of the case body 20. The case cover 40 can be fixed to the case main body 20 by locking the case cover 40. Further, a vertically penetrating hole is provided in the center of the case cover 40, and an unloader valve 92 is attached to this hole (see FIGS. 5, 7, and 8).

When the filter element 60 is thus mounted in the element accommodating space ES, the case main body 20
The communication pipe 2 is formed so as to extend downward from the upper wall 21.
2 is inserted from the opening 65a of the seal member 65 attached to the upper part of the filter element 60. When the filter element 60 is completely installed in the case main body 20, the lip portion 65b of the seal member 65 is closed.
The upper wall 21 is pressed from below to open outward, the air in the conical portion becomes a negative pressure, and the lip portion 65b comes into close contact with the upper wall 21 of the case body 20. As a result, the base 61 of the filter element 60 and the communication pipe 22 are sealed, and the air in the base 61 of the filter element 60 efficiently flows to the outlet 32.

Further, as shown in FIG. 5, on the lower surface of the upper wall 21 of the case main body 20, there is provided a ring-shaped lip protection portion 29 protruding downward, and as described above, the filter element 60 is provided in the element accommodation space. The lip portion 6 of the seal member 65 opened outward in the state of being mounted in the ES.
5b is located inside the lip protection portion 29. That is, in the state where the filter element 60 is mounted in the cleaner case 10, the lip protection portion 29 is positioned so as to surround the outer periphery of the lip portion 65b of the seal member 65 that spreads outward.

The upper cover 30 is attached to the upper part of the case body 20. The upper cover 30 has a box-shaped box portion 31 and a cylindrical outlet (air outlet) 32 formed by horizontally bending and extending from the central portion of the box portion 31. When the cover 30 is attached to the upper cover attachment frame 28 formed on the upper surface of the upper wall 21 of the case body 20, the resonator space RS is formed between the box portion 31 and the upper wall 21 of the case body 20. (See FIG. 5). Inlet 2
The air that has flowed in from 4 enters the element housing space ES through the air inflow window 25 and flows around the outer periphery of the filter element 60. Then, it passes through the filter paper 62 of the filter element 60 in the direction from the outer peripheral portion toward the inner peripheral portion to reach the inside of the base 61, and the inside of the resonator space RS is communicated by the communicating pipe 22 communicating with the inner space of the base 61. Through the outlet 32 to the outside of the air cleaner 1. Since the outlet 32 is connected to the intake system of the engine (not shown), the air cleaner 1
The air inside vibrates due to the opening and closing of the intake valve of the engine, but as described above, the resonator space R is inserted in the middle of the air flow path.
Since S, that is, the resonance space is located, the intake noise is attenuated and the intake operation is smoothly performed.

Further, as described above, since the air that has entered the element housing space ES through the air inflow window 25 flows around the outer periphery of the filter element 60, the centrifugal force thereof causes large dust and small stones contained in the air. Dust having a relatively large mass is separated. In the air cleaner 1, as shown in FIG. 6, the center axis AX1 of the cylindrical element housing space ES and the center axis AX2 of the filter element 60 held in the element housing space ES are slightly deviated from each other. 60 central axis AX2
Is located on the right rear side of the center axis AX1 of the element housing space ES (lower right of the paper surface in FIG. 6), and is located on the inner wall of the cylindrical case body 20 forming the element housing space ES and the outer surface of the filter element 60. Since the width of the air passage formed by is smoothly changed from a wide portion to a narrow portion, the velocity of the air flowing from the inlet 24 is gradually increased to more effectively separate dust having a relatively large mass. You can do it.

The dust having a relatively large mass thus separated by the centrifugal force falls downward along the inner wall of the case body 20, but the dust having a relatively large mass is introduced into the dust capturing space DS. , A ring-shaped gasket holding portion 82 has a cutout portion 84 (see FIG. 6) penetrating vertically.
In (indicated by diagonal lines). The dust trap space DS is a closed space having a bottomed cylindrical ring surrounded by the case body 20, the case cover 40, and the dust cover 80, and has a relatively large mass that has dropped downward along the inner wall of the case body 20. Large dust enters the dust capturing space DS through the cutout portion 84 together with part of the air swirling in the element housing space ES.

A dust cover 80 is provided on the upper surface of the bottom wall 41 of the case cover 40 as shown in FIGS. 6, 8 and 10.
Support ribs 42, 4 for supporting the bottom surface of the
2, 42 are provided, and these dust cover support ribs 42, 42, 42 have a blade shape in which the air flowing from the inlet 24 is bent in the same direction as the air flows in the element housing space ES. In addition, the dust trap space DS is passed from the element accommodation space ES through the cutout portion 84.
Since the air that has entered the inside continues to turn in the same direction as the air that has flowed in from the inlet 24 in the element housing space ES, the dust having a relatively large mass that has entered the dust trap space DS is The air in the DS travels in the dust capturing space DS, is separated from the air in the dust capturing space DS by the centrifugal force, and falls downward along the inner wall of the case cover 40. Then, the dust having a relatively large mass that has fallen to the vicinity of the bottom wall 41 of the case cover 40 is moved by the air swirling in the dust capturing space DS along the dust cover supporting ribs 42, 42, 42 to the upper surface side of the bottom wall 41. Collected in the center, that is, in the center of the bottom of the dust capturing space DS. The relatively large dust collected in the center of the upper surface side of the bottom wall 41 of the case cover 40 in this way releases the case cover 40 from the case body 20 by releasing the locking by the clamps 43, 43, 43 described above. By removing it, it can be discharged to the outside of the air cleaner 1.

Further, on the upper surface side of the bottom wall 41 of the case cover 40, as shown in FIGS. 6, 8 and 10, 13 plate-shaped dust cover mounting guides 44, 44 ... The plate-like dust cover mounting guides 44, 44, ... Are provided so as to extend vertically from the upper surface side of the bottom wall 41 and hold the outer peripheral surface of the dust cover 80 in the tangential direction of the outer peripheral circle of the dust cover 80. For the inlet 24
The air flowing in from is in contact with the outer peripheral surface of the dust cover 80 while inclining in the same direction as the direction in which the element housing space ES is rotated. Therefore, the dust having a relatively large mass that has entered the dust trap space DS and has fallen to the vicinity of the bottom wall 41 of the case cover 40 is guided by the air swirling in the dust trap space DS along the dust cover mounting guides 44, 44. And is guided to the center of the bottom of the dust capturing space DS. Further, the dust cover 80 is fitted to the dust cover mounting guides 44, 44, ...
The trapezoidal convex portion 80a is provided on the outer peripheral portion of the dust cover 80, and the convex portion 80a is provided on the dust cover mounting guides 44, 44, ... A receiving portion 44a for receiving is provided. The center axis AX1 of the element housing space ES and the center axis AX2 of the filter element 60 are slightly displaced from each other, and the width of the air passage formed by the inner wall of the cylindrical case body 20 and the outer surface of the filter element 60. Since it changes smoothly from a wide portion to a narrow portion, it is necessary to position the dust cover 80, which holds the lower portion of the filter element 60, in the rotational direction. Therefore, when attaching the dust cover 80 to the case cover 40, the protrusion 80a of the dust cover 80 is attached to the dust cover attachment guide 4
If the dust covers 80 are fitted into the receiving portions 44a, the dust cover 80 can be easily mounted and positioned in the rotational direction, and the dust cover 80 is not mounted in the wrong direction.

Moisture in the air flowing from the inlet 24 into the case body 20 is condensed on the inner wall of the base portion of the inlet pipe 70 (inner wall of the base portion 71) to form water droplets. The water droplets attached to the inner wall portion of the base portion are caused by their own weight. While moving to the bottom of the inner wall, the air flowing in the element housing space ES pushes the air toward the outlet side (air inflow window 25 side) of the air, so that the notch 75 formed in the inlet pipe 70 causes the water storage space. Fall into WS. Further, since the tip of the water guide portion 74 of the inlet pipe 70 is located in the water storage space WS, the water that has not fallen from the notch 75 also travels through the water guide portion 74 and is collected from the tip thereof. It falls into the space WS. here,
In order to make it easier for water in the air flowing in from the inlet 24 to condense, a lattice-like member (for example, a tubular member having a honeycomb structure) may be inserted and attached in the inlet 24. In addition, air that does not become water droplets on the inner wall of the base of the inlet pipe 70 (air containing water)
Has a larger inertia than air that does not contain water, so that it goes straight through the air inflow window 25 without flowing into the element housing space ES, and most of it goes into the water storage space WS. The water accumulated in the water storage space WS is discharged to the outside of the air cleaner 1 by pushing up the unloader valve 91 to open the water drain hole provided in the water storage tank half body 23. You can

As described above, the water in the air flowing from the inlet 24 is separated in the inlet pipe 70 and accumulated in the water storage space WS, but not all the water is separated in the inlet pipe 70. .
Water that has not been separated from the inflow air in the inlet pipe 70 enters the element housing space ES through the air inflow window 25 of the case body 20, and the water is condensed on the inner wall of the case body 20 while traveling in the element housing space ES. And then run down. As can be seen from FIG. 5, such moisture flows down to the gasket holding portion 82 of the dust cover 80, and the water that has flowed down to the gasket holding portion 82 flows into the dust capturing space DS from the above-mentioned cutout 84 portion. The water thus flowing into the dust trap space DS can be discharged to the outside of the air cleaner 1 by pushing up the unloader valve 92 to open the hole in the central portion of the case cover 40.

When the filter element 60 is removed from the case body 20 such as when cleaning the filter element 60, first, the clamps 43, 43, 43 hooked on the clamp engaging portion 27 at the bottom of the case body 20 are locked. To remove the case cover 40 from the case body 20, and then attach the dust cover 80 to the filter element 6
Remove from the bottom of 0. And the filter element 60
The lower part of the is gripped by hand and tilted obliquely so that the lip portion 65b of the seal member 65 adsorbed to the upper wall 21 of the case body 20 is peeled off from the upper wall 21. After this, the filter element 60 can be separated from the case body 20 by pulling out the filter element 60 downward and taking it out from the case body 20.

The structure of the air cleaner 1 is as described above, but in the air cleaner 1, as described above,
The dust cover support ribs 42, 42, 42 are the inlet 2
The air that has flowed in from 4 has a vane shape that is bent in the same direction as the direction in which the element housing space ES is rotated, and enters the dust trapping space DS from the element housing space ES through the cutout portion 84. Since the fresh air continues to flow in the same direction as the air flowing from the inlet 24 in the element housing space ES, the dust having a relatively large mass that has entered the dust capturing space DS flows in the dust capturing space DS. By the swirling air, along the dust cover supporting ribs 42, 42, 42, the center of the upper surface side of the bottom wall 41,
That is, the dust is collected in the center of the bottom of the dust capturing space DS. Further, the dust cover mounting guides 44, 44, ... Are trapped in the same direction as the air flowing from the inlet 24 in the tangential direction of the outer circumferential circle of the dust cover 80 in the direction in which the air flows in the element housing space ES. The dust having a relatively large mass that has entered the space DS is
Similarly, the air swirling inside is guided to the center of the bottom of the dust capturing space DS along the dust cover mounting guides 44, 44 .... Therefore, the dust having a relatively large mass is uniformly accumulated in the dust capturing space DS, and the entire space can be used as the dust capturing space, so that a large amount of dust having a relatively large mass can be accumulated at one time. Therefore, by removing the case cover 40 from the case body 20, it is possible to reduce the number of times that relatively large-mass dust is discharged to the outside of the air cleaner 1, which is higher than that of the conventional cyclone type air cleaner. You can get efficiency.

Further, a trapezoidal convex portion 80a is provided on the outer peripheral portion of the dust cover 80, and the convex portion 80a is received by the dust cover mounting guides 44, 44 ... In order to position the dust cover 80 in the rotational direction. It is preferable that the receiving portion 44a is provided. This allows
The dust cover 80 can be easily mounted and positioned in the rotational direction, and the dust cover 80 is not mounted in the wrong direction.

In the air cleaner 1, the central axis AX1 of the cylindrical element housing space ES and the filter element 6 held in the element housing space ES.
Although the filter element 60 is mounted in the element housing space ES such that the center axis AX2 of 0 is slightly deviated, the present invention is not limited to this, and the central axis AX1 of the cylindrical element housing space ES is not limited to this. The filter element 60 may be mounted in the element housing space ES such that the central axis AX2 of the filter element 60 held in the element housing space ES is at the same position.
Further, in the above case, the convex portion 80 is formed on the outer peripheral portion of the dust cover 80.
a and the receiving portion 4 on the dust cover mounting guides 44, 44 ...
4a and 4a may not be provided. This is because, if the central axis AX1 and the central axis AX2 are at the same position, the width of the air passage formed by the inner wall of the cylindrical case body 20 and the outer surface of the filter element 60 that form the element housing space ES is constant. Therefore, the dust cover 80 that holds the lower portion of the filter element 60 does not have to be attached and positioned in the rotation direction.

[0031]

As described above, according to the cyclone type air cleaner of the present invention, the dust cover supporting ribs are arranged in the element accommodating space from the outside of the inner bottom surface of the case cover toward the center of the swirling air flow direction. It has a blade shape bent in the same direction, and since the dust trapping space and the element housing space are connected, the air in the dust trapping space also swirls in the same direction as the swirling air flow in the element housing space, The dust having a relatively large mass that has entered the dust capturing space is guided to the center of the inner bottom surface of the case cover, that is, the center of the bottom portion of the dust capturing space along the dust cover support ribs by the swirling airflow in the dust capturing space. Further, since the dust cover mounting guide is inclined in the same direction as the flow direction of the swirling air flow in the element housing space with respect to the tangential direction of the outer circumference circle of the dust cover, the dust having a relatively large mass that has entered the dust trapping space. Are similarly guided to the center of the bottom of the dust trap space along the dust cover mounting guide by the swirling air flow in the dust trap space. Therefore, relatively large mass of dust is evenly accumulated in the dust capturing space, and the entire space can be used as the dust capturing space, so that a large amount of relatively large mass of dust can be accumulated at one time. It is possible to reduce the number of times that the cover is detached from the cleaner case to discharge dust having a relatively large mass to the outside of the air cleaner, and it is possible to obtain higher dust collection efficiency as compared with the conventional cyclone type air cleaner.

Further, when the dust cover is installed inside the case cover so as to be eccentric to the axis of the case cover, the dust cover is provided with a convex portion on the outer periphery thereof, and the dust cover mounting guide is provided for the dust cover. It is preferable to provide a receiving portion for receiving the convex portion so as to perform attachment positioning with respect to the rotation direction. With this configuration, when the dust cover is attached to the inside of the case cover, the dust cover can be easily attached and positioned in the rotation direction, and the dust cover is not attached in the wrong direction.

[Brief description of drawings]

FIG. 1 is a partial sectional front view showing an embodiment of an air cleaner according to the present invention.

FIG. 2 is a right side view of a partial cross section of the present air cleaner shown in FIG.

FIG. 3 is a left side view of a partial cross section of the present air cleaner shown in FIG.

FIG. 4 is a partial cross-sectional plan view of the present air cleaner shown in FIG.

5 is a sectional view taken along the line V-V in FIG.

6 is a cross-sectional view taken along the line VI-VI in FIG.

FIG. 7 is a bottom view seen from the arrow VII in FIG.

FIG. 8 is an exploded perspective view of the present air cleaner.

FIG. 9 is a perspective view of an inlet pipe.

FIG. 10 is a front view of a case cover.

[Explanation of symbols]

1 air cleaner 10 cleaner case 20 case body 24 inlet 25 Air inflow window 30 top cover 32 outlet 40 case cover 42 Dust cover support rib 44 Dust cover mounting guide 44a Receptor 50 side cover 60 filter elements 80 dust cover 80a convex part ES element accommodation space WS water storage space RW resonator space DS dust capture space

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F02M 35/08 F02M 35/08 DK F term (reference) 4D031 AC01 BA03 CA01 DA01 4D058 JA10 LA01 QA01 QA08 SA07 UA25

Claims (2)

[Claims] 1. A cylindrical filter element and a bottomed cylindrical element accommodating space having an opening at one end, wherein the filter element is accommodated and held in the element accommodating space, and swirled in the element accommodating space. A cleaner case is provided with an air inlet at a position where an air flow is generated, and an air outlet is provided for discharging purified air that passes through the filter element, and the cleaner case is attached to the cleaner case while covering the opening. A cylindrical case cover; and a cylindrical dust cover attached to the inside of the case cover, wherein the case cover is provided on the inner bottom surface of the case cover so as to support the bottom surface of the dust cover, From the outside of the inner bottom surface of the case cover toward the center, the element housing space A dust cover supporting rib having a blade shape bent in the same direction as the flow direction of the swirling air flow inside, and extending vertically from the inner bottom surface of the case cover and accommodating the element with respect to a tangential direction of an outer circumferential circle of the dust cover. A plate-shaped dust cover attachment guide provided so as to be inclined in the same direction as the flow direction of the swirling air flow in the space, contact the outer peripheral surface of the dust cover, and hold the outer peripheral surface of the dust cover. Cyclone type air cleaner characterized by 2. The dust cover is attached to the inside of the case cover so as to be eccentric with the axis of the case cover, and a projection is provided on an outer peripheral portion of the dust cover, and the dust cover attachment guide is provided. The cyclone-type air cleaner according to claim 1, further comprising a receiving portion that receives the convex portion so as to position and attach the dust cover in a rotational direction.