JP2554005Y2 - Cyclone air cleaner - Google Patents

Description

[Detailed description of the invention] a. The present invention relates to an air cleaner which is used in an engine or the like and has a filter element for removing dust in intake air of the air cleaner, and more particularly to an air cleaner employing a cyclone system.

(Prior Art) For example, as a countermeasure when the engine is used in a dusty area, the dusty air is swirled before removing the dust in the intake air by the filter element, and the centrifugal force due to the swirl is used. It is conventionally known to use a cyclone-type air cleaner that removes relatively large dust in advance and then removes the dust by a filter element.

However, the conventional cyclone type air cleaner is configured such that guide blades formed of, for example, resin are attached to an outer peripheral portion of the filter element, and when the filter element is mounted in the case, the guide blade is moved inside the case. In the airflow from the inlet port to the outlet port. For this reason, a swirling flow (vortex flow) of the air flow is generated inside the case by the guide vanes, and relatively large dust is removed in advance by the centrifugal force of the swirling flow, and the air having the remaining fine dust is removed. It is configured to be removed through the filter element.

(Problem to be Solved by the Invention) Here, the filter element is a consumable part, and when dust collected and removed from the air accumulates and the filter paper of the filter element becomes clogged, it is replaced with a new filter element. . Conventionally, since guide vanes are integrally attached to the filter element, when exchanging the filter element, it was exchanged with the guide vane attached. For this reason, there is a problem that the number of components of the filter element as a replacement part increases by the amount of the guide blade, and the cost of the filter element increases.

In addition, since the filter element is a consumable item, the filter element itself is also handled as a replenishing unit. However, if the guide blades are attached to the outer peripheral portion of the filter element as in the related art, the filter Since the outer dimensions of the element are increased and the guide vanes travel outside, care must be taken not to damage the guide vanes during handling.

Furthermore, since the filter element having the guide blade is inserted into the case, a certain gap is provided between the outer peripheral end of the guide blade and the inner surface of the case so that the filter element can be smoothly inserted. There is a need. However, if there is a gap in the outer periphery of the blade, air flows through the gap, so that the amount of air flowing through the blade is reduced by that much, the momentum of the swirling air flow is reduced, and the centrifugal force is reduced. There is also a problem that the dust removing effect is reduced for the reason.

The present invention has been made in view of such a problem, and provides a cyclone type air cleaner in which guide vanes are arranged on a case side and configured separately from a filter element so that only the filter element can be replaced. The purpose is to do.

B. Configuration of the Invention (Means for Solving the Problems) In order to achieve such an object, in the cyclone type air cleaner of the present invention, the case for receiving and holding the cylindrical filter element is received and held in the receiving space. An inlet port opened at one end of a cylindrical ring-shaped outer space surrounded by a cylindrical outer peripheral surface of the filter element and a cylindrical inner peripheral surface forming a receiving space; and a filter element received and held in the receiving space. An outlet port communicating with the internal space is provided. Furthermore, in this case,
Guides the air flowing from the inlet port to the part that separates one end and the other end of the cylindrical ring-shaped outer space so that it flows while turning toward the other end along the cylindrical inner peripheral surface of the case. Guide vanes are integrally joined to the cylindrical inner peripheral surface and formed in a ring shape and integrally with the case.

(Operation) In the case of the cyclone type air cleaner having such a configuration, since the guide blade is provided integrally with the case and is separate from the filter element, only the filter element needs to be replaced. In comparison, the cost of the filter element as a supply part is reduced. Further, since there is no blade protruding outward from the filter element as in the related art, the supply filter element is reduced in size and the handling thereof is facilitated.

Further, in this air cleaner, the guide vanes for generating the swirling flow are integrally joined to the cylindrical inner peripheral surface of the case and are formed in a ring shape and integrally with the case. A gap is not generated between the guide vane and the element, and only a gap for inserting the element is required between the inner end of the guide vane and the element. In other words, there is no gap on the outer periphery of the guide blade, and all air flowing along the inner surface of the case, that is, the outer peripheral surface forming the cylindrical ring-shaped outer space passes through the guide blade, generating a vibrating swirling flow. Can be done. That is, it is possible to generate a vibrating swirling airflow along the inner peripheral surface of the case and the outer peripheral portion of the guide blade where the centrifugal force increases, and apply a large centrifugal force to the dust contained in the airflow, thereby It can be effectively removed.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The cyclone air cleaner according to the present invention includes a cylindrical case 1 having a receiving space surrounded by a cylindrical inner peripheral surface 1a, a filter element 10 inserted and held in the receiving space, and an end of the receiving space. And a cover 5 attached to the case 1 to cover the opening.

First, the case 1 includes a first case member 2 having an outlet port tube 2a and a second case member 3 having an inlet port tube 3a.
And a third case member 4 having guide blades 4a. Each of the case members 2, 3, 4 is integrally formed by resin injection molding or the like. After being separately formed in this manner, the right flange 2c of the first case member 2 and the left flange 3b of the second case member 3 are welded and joined, and the right flange 3c of the second case member 3 and the third case member are joined. 4 is welded and joined to the first to third case members 2, 3, 4
Are joined together.

As shown in FIG. 2, the first case member 2 has an outlet port pipe 2a projecting outward from the center of the left end face thereof and bent at a right angle. A guide tube 2b projecting from the outlet port tube 2a.
An outlet passage 26 is formed through the guide tube 2b. The second case member 3 has an inlet port pipe 3a which is eccentric from the axis of the case 1 and protrudes outward, and an inlet passage 21 communicating with the internal space is formed in the inlet port pipe 3a. . As shown in FIG. 4, the third case member 4 is provided with a plurality of guide blades 4a arranged in a ring along the inner periphery thereof. Further, a mounting bracket 4d having mounting screws 4e for mounting the case 1 to an engine or the like is integrally formed on an outer peripheral portion of the third case member 4.

The cover 5 covers the right end opening of the receiving space of the case 1 formed as described above, and is attached to the right end of the case 1 by three clamp members 6. For this attachment, an inlay guide is provided on the right flange 4c of the third case member 4 and the flange 5a of the cover 5.

In this way, the filter element 10 is inserted and held in the receiving space of the case 1 covered by the cover 5. The filter element 10 includes a cylindrical inner tube 13 made of a punched metal plate having a number of small holes, and a bellows-shaped folded filter paper 15 (see FIG. 4) disposed so as to surround the outer periphery of the inner tube 13. ) And this bellows folded filter paper
A cylindrical protector 14 arranged outside the outer periphery of the outer space 15 at a predetermined space 24, these inner tubes 13, filter paper
15 and end plates 11 and 12 that hold both ends of the protector 14.

In FIG. 1, a circular hole is formed in the center of the end plate 11 on the left side (on the side of the outlet passage 26), and when the filter element 10 is inserted into the case 1, the guide tube 2b is inserted into the circular hole. It is designed to protrude. In addition,
A ring-shaped gasket 16 is attached to the left side surface of the end plate 11, and the gasket 16 contacts the right side surface of the first case member 2 in a state where the filter element 10 is inserted and held in the case 1. .

In FIG. 1, the right end plate 12 covers the right side of the inner tube 13, the filter paper 15, and the protector 14, and the outer periphery further extends outward from the outer periphery of the protector 14 to form a flange portion 12a. A ring-shaped gasket 17 is provided on the outer peripheral end of the flange 12a.
The outer peripheral end of the flange portion 12a is held together with the gasket 17 by the right end flange 4c of the case 1 and the flange 5a of the cover 5. It should be noted that a dust introduction opening 12b is formed at one location on the circumference of the flange portion 12a.

Therefore, when the filter element 10 is inserted into the case 1, the left side thereof is guided by the guide tube 2 b and the left end plate is inserted through the gasket 16.
11 is in contact with the right end face of the first case member 2, and the right side thereof is held by the flange portion 12 a of the right end plate 12 sandwiched between the case 1 and the cover 5 via the gasket 17.

The protector 14 that forms the outer periphery of the filter element 10 is inserted into the case 1 and
The part located on the left side of 4a is made of a normal plate, and completely separates the internal space 24 and the external space 22, but the part located on the right side of the guide blade 4a is punch metal. Many small holes 14a are formed in a shape,
The internal space 24 and the external space 23 communicate with each other through the small holes 14a.

The removal of dust by the cyclone air cleaner configured as described above will be described.

This air cleaner is attached to the intake port side of an engine (not shown), and its inlet port pipe 3a
Opens to the atmosphere, and the outlet port pipe 2a is connected to the intake manifold of the engine. For this reason, during operation of the engine, air containing dust in the atmosphere flows into the inlet port pipe.
The dust enters the air cleaner from the inlet passage 21 of 3a, and after the dust is captured and removed there, is supplied to the engine from the outlet passage 26 of the outlet port tube 2a.

The air introduced from the inlet passage 21 into the receiving space of the case 1 enters the outer space surrounded by the outer peripheral surface of the filter element 10 and the inner peripheral surface 1a of the case 1. The outer space is divided into a left outer space 22 and a right outer space by the guide vanes 4a.
The inlet air first enters the left outer space 22 from the inlet passage 21. Here, since the outer peripheral surface of the filter element 10, that is, the protector 14 is made of a solid plate material in a portion defining the left outer space 22 (a portion on the left side of the guide blade 4a), the left outer space 22 is formed.
The air that has entered inside passes through the guide vanes 4a and is
It flows into 23.

At this time, the air passing through the guide blade 4a
A swirling flow (eddy current) flows clockwise as viewed from the left side while swirling clockwise (arrow A). Dust is contained in the air forming the swirling flow, and due to the centrifugal force due to the swirling flow, dust having a relatively large mass is discharged to the outside and swirled along the inner peripheral surface of the case 1. While flowing to the right, and at the right end, an end plate
The dust enters the dust capture space 27 from the dust introduction opening 12b formed in the 12 flange portion 12a. This dust capture space 27
This is a closed space surrounded by the end plate 12 and the cover 5. In this way, relatively large-mass dust in the air introduced from the inlet passage 21 is first captured in the dust capturing space 27.

The air from which the heavy dust has been removed in this way passes from the right outer space 23 through a number of small holes 14a formed on the right side of the protector 14, and passes through the protector 14 and the filter paper 1
5, flows into the predetermined space 24, passes through the filter paper 15 from the predetermined space 24, further flows through the small hole of the inner tube 13, and flows into the internal space 25 of the element. Here, when passing through the filter paper 15, dust in the air is removed by the filter paper 15 to be cleaned.

The air thus purified is supplied from the internal space 25 to the engine through the outlet passage 26.

As described above, in the case of the air cleaner of this embodiment, the swirling flow generated by the guide vanes 4a first removes large-mass dust, and then removes the remaining dust using the filter paper 15.

Here, in the case of this example, the guide blade 4a is formed integrally with the case 1 (specifically, the third case member 4).
It is separate from the filter element 10. Therefore, the replacement of the filter element 10 can be performed alone. That is, in the case of this example, the guide vane is not included in the supply / replacement element.

Further, the case 1 of the present example includes first to third case members 2, 3,
After molding 4 separately, they are welded and joined to form an integral body, so that the radial positional relationship of the outlet port pipe 2a, the inlet port pipe 3a, and the mounting bracket 4d can be freely changed and set at the time of welding. . Therefore, even when the type of the engine and the mounting position of the air cleaner are different, it is possible to easily cope with the change in the positional relationship.

Further, in the case 1 of the present embodiment, the mounting bracket 4d having the mounting screw 4e on the third case member 4 is provided.
Are provided integrally, but there are cases where the air cleaner is attached by a band, and in this case, the attachment bracket 4d is unnecessary. In such a case, a part of the mold used to form the third case member 4 may be changed to form a third case member having a shape from which the mounting bracket 4d has been removed. That is, in the case of this example, there is an advantage that it is possible to cope with a plurality of types of mounting methods by only partially changing a part of the mold.

C. Effects of the Invention As described above, according to the present invention, the case that receives and holds the filter element has the inlet opening at one end side of the outer space surrounded by the outer peripheral surface of the filter element and the inner peripheral surface of the receiving space. A port, an outlet port communicating with the inner space of the filter element, and air flowing from the inlet port located at a portion separating one end and the other end of the outer space along the inner peripheral surface of the receiving space. The guide vanes are provided integrally with the guide vanes that guide them to flow while turning toward the end.The guide vanes are separate from the filter element, so the guide vanes can be replaced and only the filter element can be replaced. Further, the cost of the filter element as a replenishing part can be reduced as compared with the related art. Further, since the filter element does not have a blade protruding outward as in the conventional case, the supply filter element is reduced in size and the handling thereof is easy.

Further, in the air cleaner of the present invention, the guide vanes for generating the swirling flow are integrally joined to the cylindrical inner peripheral surface of the case and are formed in a ring shape and integrally with the case, so that the inner peripheral surface of the case is There is no gap between the guide vanes,
All of the air flowing along the inner peripheral surface of the case, that is, the outer peripheral surface forming the cylindrical ring-shaped outer space passes through the guide vanes, and a vibrating swirling flow can be generated. As a result, a vibrating swirling airflow is generated along the inner peripheral surface of the case and the outer peripheral portion of the guide blade where the centrifugal force is increased, and a large centrifugal force is applied to the dust contained in the airflow, and these are effective. Can be removed.

[Brief description of the drawings]

1 is a cross-sectional view of the cyclone air cleaner according to the present invention, FIG. 2 is a left side view of the cyclone air cleaner, FIG. 3 is a right side view of the cyclone air cleaner, and FIG. Arrows in Fig. 1
FIG. 4 is an end view viewed along IV-IV. 1 ... Case, 2a ... Outlet port tube 3a ... Inlet port tube, 4a ... Guide vane 5 ... Cover, 6 ... Clamping member 10 ... Filter element 14 ... Protector, 15 ... Filter paper

Claims (1)

(57) [Scope of request for utility model registration] 1. A filter device comprising: a cylindrical filter element; and a case having a cylindrical receiving space for receiving and holding the filter element. The case includes a cylinder of the filter element received and held in the receiving space. An inlet port opened at one end of a cylindrical ring-shaped outer space surrounded by a cylindrical outer peripheral surface and a cylindrical inner peripheral surface forming the receiving space, and an inside of the filter element received and held in the receiving space. An outlet port communicating with the space is provided, and the air flowing from the inlet port into a portion that partitions the one end side and the other end side of the cylindrical ring-shaped outer space into the cylindrical inner peripheral surface of the case. Guide vanes are formed to be integrally joined to the cylindrical inner peripheral surface in a ring shape and integrally with the case, the guide vanes being guided to flow while rotating toward the other end side along. Cyclonic air cleaner, characterized in that there.