JPH0747100B2 - filter - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a filter used in a dust collector of a motor vehicle, and more particularly to a filter provided with a ceramic filter and washed with backflowing air.

BACKGROUND ART Recently, in trucks and buses equipped with diesel engines, a dust collector for collecting soot (black smoke) contained in exhaust gas has been developed using a ceramic filter. Since it is manufactured into a honeycomb structure or a pipe structure, the exhaust gas with pulsation does not flow uniformly in the filter, and in a ceramic filter having such a structure, soot is uniformly collected on the filter surface. Was difficult.

Objects and problems of the invention An object and problems of the present invention are to allow exhaust gas to flow evenly on a filter surface, to collect soot uniformly on the filter surface, and to make a dust collector small and lightweight. The purpose is to provide a filter used for the dust collector of an automobile.

Summary of the Structural Invention Related to the Object / Problem: Content of the Invention to Be Claimed
A ceramic filter having a ventilation hole for passing exhaust gas from one surface to the other surface, a porous partition at least partially integrally bonded to the other surface of the ceramic filter, and the ceramic The flow control port is configured to include a filter and a flow control port that penetrates through the partition to reduce the air flow resistance of the ceramic filter at the flow control port to the outside of the partition from the flow control port. A part of the exhaust gas is made to flow into the filter surface, the exhaust gas is made to flow uniformly on the filter surface, and the soot contained in the exhaust gas is collected on the entire surface of the filter surface.

Description of Specific Example Hereinafter, a specific example in which the filter according to the present invention is specified will be described with reference to the drawings.

1 and 2 show a diesel engine (not shown)
Dust collector (not shown) for trucks (not shown)
10 shows a tenth specific example of the filter of the present invention applied to.

The filter 10 is used in the dust collector installed in a muffler (not shown) arranged in the exhaust system of the diesel engine, and in particular, a large number of the filters 10 are used in the dust collector. It was used in a state in which it was arranged at a predetermined interval.

The filter 10 comprises a large number of ceramic filters 11 each having a ventilation hole formed in advance in a pipe having a predetermined length,
Porous ceramic partitions 12 in which the ceramic pipe filters 11 are embedded in parallel at a predetermined interval and the ceramic pipe filters 11 respectively correspond to the ceramic pipe filters 11 and the ceramic pipe filters 11. It was made into a panel block that contained a number of flow control ports 13 that were pierced by partitions 12.

In the ceramic pipe filter 11, the upper end opening is used for the exhaust gas inlet 20, the lower end opening is used for the blowout opening 21, and the inner side surface is used for the filter surface 22.

Further, the ventilation holes of the ceramic pipe filter 11 are such that the soot contained in the exhaust gas of the diesel engine does not pass through, that is, the soot is collected on the filter surface 22.

The ceramic partition 12 blows the collected soot from the filter surface 22 of the ceramic pipe filter 11, and when cleaning the ceramic pipe filter 11, in the direction opposite to the flow of the exhaust gas, The ceramic pipe filter 11 is reinforced against high-pressure air that is blown momentarily, and a cleaning exhaust gas chamber is defined in the dust collector. Of course, this ceramic
The partition 12 is porous enough to show little resistance to the passage of gas and the passage of its soot.

Further, the ceramic partition 12 has butt ribs 25 and 26 projected on both partition surfaces 23 and 24 at the upper and lower ends corresponding to both ends of the ceramic pipe filter 11, respectively. The ribs 25, 26 were abutted against each other when a number of them were placed next to each other and were shaped to form a scrubbing exhaust chamber between the ceramic partitions 12, 12.

The flow control port 13 is formed by penetrating the ceramic pipe filter 11 and the ceramic partition 12 on the side of the outlet 21 of the ceramic pipe filter 11, and at the exhaust gas inlet 20 thereof. The inflowing exhaust gas directs the flow of the exhaust gas so that it flows evenly to the filter surface 22 in the ceramic pipe filter 11.

That is, the flow control port 13 partially reduces the ventilation resistance of the ceramic pipe filter 11 so that a part of the exhaust gas is discharged from the inside of the ceramic pipe filter 11 to the outside of the ceramic partition 12. The exhaust gas to the filter surface 22
The soot contained in the exhaust gas is collected on the entire surface of the filter surface 22.

Next, a case where the filter 10 collects soot in the exhaust gas discharged from the diesel engine in the dust collector will be described.

The exhaust gas of the diesel engine flows inside the dust collector at the ceramic pipe filter 11 embedded in the ceramic partition 12 from the exhaust gas inlet 20, and the exhaust gas that has flowed into the interior is exhausted. Since a part of the exhaust gas flows from the flow control port 13 to the outside of the ceramic partition 12, a large part of the exhaust gas is accompanied by the exhaust gas flow of the part, and the filter surface of the ceramic pipe filter 11 It flows evenly over the entire surface of 22 and passes through the ceramic pipe filter 11 and the ceramic partition 12 to the outside of the ceramic partition 12.

As such, the exhaust gas is passed through the ceramic pipe filter 11 and the ceramic partition 12, while the soot contained in the exhaust gas is collected on the filter surface 22 and, accordingly, the ceramic filter. The pipe filter 11 is clogged with the soot.

Then, the clean exhaust gas flowing to the outside of the ceramic partition 12 is discharged from the outlet of the dust collector to the atmosphere through the tail pipe of the muffler.

On the other hand, the soot collected on the filter surface 22 is separated from the filter surface 22 by the high-pressure air that is momentarily blown into the ceramic pipe filter 11 from the outside of the ceramic partition 12, and the soot is removed. Outlet 21
From outside the ceramic pipe filter 11.

Although in the filter 10 described above, the ceramic filter 11 was described as being made into a short tube, the ceramic filter 11 may be made into pipes of various cross-sectional shapes, and a single It may be produced in a plate-shaped tube, or it may be produced in a sheet shape.

When the ceramic filter 11 is manufactured in a tubular shape or a tubular shape, the inner surface thereof is used as one surface and the outer surface thereof is used as the other surface, and the one surface thereof is the soot. Used on the filter surface to collect. Further, when the ceramic filter 11 is produced in a sheet shape, one sheet surface is used as one surface and the other sheet surface is used as the other surface, and the one surface captures the soot. Used for collecting filter surface.

Further, in the above-described filter 10, the ceramic partition 12 has been described as having a large number of the ceramic pipe filters 11 embedded in parallel at predetermined intervals, but the ceramic partition 12 is
The ceramic filter 11 may be coupled to the ceramic filter 11 depending on the shape of the ceramic filter 11, and may be at least partially integrally coupled to the other surface of the ceramic filter 11.

Convenience and Benefits of the Invention As will be understood from the above, when compared with the ceramic filters that have already been developed, the filter of the present invention is a ceramic having a vent hole from one surface to the other through which exhaust gas passes. Including a filter, a porous partition at least partially integrally coupled to the other surface of the ceramic filter, and a flow control port penetrating the ceramic filter and partition In the filter of the present invention, the ceramic
The ventilation resistance of the filter is partially reduced by its flow control port, and a portion of the exhaust gas flows from the flow control port to the outside of the partition, with the result that the exhaust gas is filtered by the ceramic filter. Flowing uniformly on the surface, soot contained in the exhaust gas is collected on the entire surface of the filter,
As a result, the dust collector is reduced in size and weight, and the dust collector can be mounted in an automobile, which is very useful and practical for the automobile.

Relationship between the Invention and Specific Examples As described above, from the specific examples of the present invention described with reference to the drawings, various design modifications can be made to those having ordinary knowledge in the technical field to which the present invention belongs. And changes are easily made, and moreover, the content of the present invention is essential for the establishment of an invention that accomplishes the subject of the invention, and is derived from the technical essence of the invention, which is the nature of the invention. And then it is easily replaced by an objectively recognized embodiment.

[Brief description of drawings]

FIG. 1 is a perspective view showing a specific example of the filter of the present invention applied to a dust collector of a truck equipped with a diesel engine, and FIG. 2 is taken along line 2-2 of FIG. It is the sectional view shown. 11 …… Ceramic pipe filter, 12 …… Ceramic partition, 13 …… Flow control port.

Claims (1)

[Claims] 1. A ceramic filter having a ventilation hole for passing exhaust gas from one surface to the other surface, and a porous partition at least partially integrally bonded to the other surface of the ceramic filter. And a flow control port that is threaded through its ceramic filter and partition.