JPH0236623Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air cleaner, particularly a cyclone section structure of a large air cleaner equipped with a straight flow cyclone tube.

[Conventional technology]

Air cleaners for large automobiles, construction vehicles, etc., which are generally used in dusty areas, tend to get clogged quickly with dust if only a filter element is used. For example, a cyclone section with a straight flow cyclone tube is installed on the upstream side of the filtering element, and coarse particles are centrifugally separated and removed by blowdown airflow, and fine particles that are not separated and removed are removed. Air cleaners are used that collect only dust using material.

The conventional example is a patent application filed in 1983 by the same applicant.
27645 and Japanese Patent Application No. 59-27646. The contents will be briefly explained below using FIGS. 2 to 4 of the present application. A cyclone portion C of an air cleaner A has a large number of cyclone tubes 10 erected and engaged with an upper cover 2 and a lower cover 3 provided in parallel inside a case body 1. The cyclone tube 10 has a first tube 4 and a second tube 8.
The upper part of the first tube 4 is engaged with the upper cover 2 of the dust-containing air inlet part B, the first inlet 5 is provided with a swirling blade 6, and the lower part thereof is formed with a swirling outlet 7. The lower part of the second tube 8 is engaged with the lower lid 3 on the connecting portion D side of the over-type element, and forms a second inlet 9 and an outlet 11.

As illustrated in FIG.
Make effective use of the area and install a large number of them.

Further, as shown in FIG. 2, a blowdown pipe 12 is provided on the side of the case body 1 and at a height position midway between the second tube 8.

The dust-containing air sucked in from the dust-containing air inlet B side by the suction force of the engine (not shown) from the connection part D side of the cyclone tube 10
The coarse particle size dust is sucked into the first inlet 5 of the first tube 4, and is whirled down along the inner wall of the first tube 4 by the centrifugal force by the swirling vanes 6 shown in the enlarged view of FIG. 4, as shown in FIG. , flows out to the outside of the second tube 8 from the swirling outlet 7 formed by the lower part of the first tube 4 (opening outward) and the upper part of the second tube 8, for example, an exhaust pipe (not shown). It is discharged to the outside through a blowdown pipe 12 by a bench lily provided in the.

Incidentally, fine particle dust that is not centrifuged by the swirling vane 6 passes from the second inlet 9 of the second tube 8 to the outlet 11 and is collected by the filter element.

[Problem that the invention attempts to solve]

However, the above conventional cyclone tube 1
For example, in order to increase the number of pipes to be installed, as shown in FIG.
Since it is placed above the X-ray, the centrifuged coarse particle size dust is discharged from the blowdown pipe 12 through a zigzag course, and the second tube 8 acts as a resistor, so the blowdown pipe A disadvantage is that the farther the cyclone tube 10 is located than the cyclone tube 12, the lower the discharge efficiency.

[Means for solving problems]

The present invention is intended to solve the above-mentioned drawbacks, and is arranged so that the center axis of the cyclone tube is disposed outside the extension line of the inner diameter of the blowdown pipe within the case body.

[Effect]

The suction force of the blowdown pipe is strongest in a straight line from the installation position of the pipe toward the inside of the case body, so the center axis of the cyclone tube should be placed outside the extension line of the inner diameter of the blowdown pipe inside the case body. As a result, the resistor provided by the cyclone tube is eliminated, so the cyclone tube installed outside the extension line inside the case body smoothly flows to the extension line of the inner diameter of the blowdown pipe, and the centrifuged coarse particle size dust is strongly blown down. It is sucked into the pipe side.

〔Example〕

The above embodiment will be explained with reference to the drawings. Although FIG. 1 shows an embodiment, FIGS. 2 to 4 are used for common parts.

The cyclone tube 10 of the cyclone section C is
The upper cover 2 and lower cover 3 are installed parallel to each other inside the case body 1 in the same manner as before, but the mounting position is different, and the mounting position of the blowdown pipe 12 to the case body 1 is also the same as before. It is.

Central axis Y- of the cyclone tube 10 in FIG.
The Y line is defined as the central axis 15 in FIG. 1, and the central axis 15
is arranged so as to be outside an extension line (indicated by a dotted line) 14 of the inner diameter 13 of the blowdown pipe 12 inside the case body. If the central axis 15 of the cyclone tube 10 is arranged so that the extension line touches the outer diameter of the second tube 8 of the cyclone tube 10, the zigzag pattern caused by the second tube 8 flowing into the blowdown pipe 12 as described above. Cyclone tubes 1 with low resistance and many installed
The centrifuged coarse particle size dust is smoothly and efficiently discharged from the blowdown pipe 12.
In an experimental example, between a conventional type with the same number of cyclone tubes and a type according to the present invention, the discharge effect according to the present invention was 10 to 15% better.

[Effect of idea]

As mentioned above, in the arrangement of the cyclone tube in the cyclone part of the air cleaner, the present invention has a structure in which the central axis of the cyclone tube is placed outside the extension line of the inner diameter of the blowdown pipe inside the case body. This improves the efficiency of discharging dust from the cyclone tube located far from the air cleaner tube, which has the effect of extending the life of the air cleaner as a whole.

[Brief explanation of drawings]

Fig. 1 is an explanatory plan view of the cyclone section according to the present invention, Fig. 2 is a longitudinal sectional view of a part of the main part of the conventional product, Fig. 3 is an explanatory plan view thereof, and Fig. 4 is an enlarged plan view of the cyclone tube. It is a diagram. 1...Case body, 2...Top lid, 3...Bottom lid,
10...Cyclone tube, 12...Blowdown pipe, 13...Inner diameter, 14...Extension line, 1
5... Central shaft, A... Air cleaner, C... Cyclone section.

Claims (1)

[Scope of utility model registration request] In the cyclone part of the air cleaner, which has a large number of cyclone tubes erected between the upper and lower lids provided inside the case body and blowdown pipes provided outside the case body, the central axis of the cyclone tubes is connected to the blowdown tube. A cyclone part structure of an air cleaner characterized by being arranged outside the extension line of the inner diameter of the pipe inside the case body.