KR101126458B1 - Filter assembly and apparatus for reducing exhaust gas including the same - Google Patents

Abstract

The present invention relates to a filter assembly in which a filter and an exhaust gas vent flow path of an electrode part are communicated with each other to prevent the flow of exhaust gas flowing into the filter, and an exhaust gas reducing device including the same. The filter assembly according to the present invention is disposed on a flow path through which the exhaust gas is discharged from the engine, and a ventilation passage through which the exhaust gas flows is formed by a grid-shaped section and collects particulate matter contained in the exhaust gas on the ventilation passage. Diesel Particulate Filter having a shape and an electrode part disposed on at least one side of both sides of the filter and having a lattice pattern communicating with the air flow passage of the filter and receiving power to heat the filter. The plurality of partition regions of the lattice pattern are alternately formed by openings and closing holes. As a result, the opening of the filter and the electrode portion communicate with each other to secure air permeability of the exhaust gas, thereby preventing a decrease in pressure and a decrease in efficiency of the filter, thereby improving product reliability.

Diesel, particulate matter, filter, electrode part, lattice pattern

Description

Filter assembly and exhaust gas reducing device including same {FILTER ASSEMBLY AND APPARATUS FOR REDUCING EXHAUST GAS INCLUDING THE SAME}

The present invention relates to a filter assembly and an exhaust gas reducing apparatus including the same, and more particularly, to a filter assembly having an improved structure of an electrode part to prevent the flow of exhaust gas flowing into a filter, and an exhaust gas including the same. It relates to an abatement device.

Diesel is used as fuel and is used as a power source for vehicles and ships. The diesel engine has advantages such as superior fuel efficiency and output compared to gasoline engines using gasoline.

However, unlike a gasoline engine using gasoline as a fuel, a diesel engine also has a disadvantage in that exhaust gas containing particulate matter (PM) and nitrogen oxides are emitted.

Particulate matter and nitrogen oxide contained in the exhaust gas of the diesel engine is recognized as the main cause of air pollution, and the regulations on the acceptance criteria are being strengthened in each region such as Europe and the United States. Accordingly, a diesel particulate filter (DPF) and a filter coated with a reduction catalyst are disposed between the diesel engine and the muffler to post-process particulate matter and nitrogen oxide contained in exhaust gas from a diesel engine. do.

Here, a collecting space is formed in the filter, and particulate matter and the like are collected in the collecting space. Particulate matter and the like collected in the filter is used to burn the particulate matter for regeneration.

For example, an electric heater or a diesel burner may be provided between the engine and the filter to raise the temperature of the exhaust gas to the extent that the particulate matter collected inside the filter can be burned.

As another example, since an additional electric heater or diesel burner is disposed between the engine and the filter, the productivity is reduced, and thus there is a method of directly connecting the electrode part to at least one side of the filter. Thus, the filter is heated by an electrode part directly connected to one side of the filter, whereby particulate matter and the like collected in the filter are burned.

However, the filter using the electrode portion has a problem of blocking the area of the filter by the shape of the electrode portion. Due to the shape of the electrode portion, the air permeability of the exhaust gas flowing into the filter is lowered, thereby reducing the collection efficiency of the filter.

Accordingly, an object of the present invention is to provide a filter assembly having an improved structure of the electrode portion so as to secure air permeability of the electrode portion and the exhaust gas of the filter, and an exhaust gas reducing device including the same.

In addition, another object of the present invention is to provide a filter assembly and an exhaust gas reduction device including the same, which divides the inside of the filter into a plurality of collection spaces, thereby improving the collection efficiency of the filter by matching the structure of the electrode unit.

The objects of the present invention are not limited to the above-mentioned objects, and other objects which are not mentioned will be clearly understood by those skilled in the art from the following description.

Means for Solving the Problems According to the present invention, a ventilation passage through which the exhaust gas flows is formed on a flow path through which the exhaust gas is discharged from the engine, and the grid-shaped section is formed and included in the exhaust gas on the ventilation passage. A diesel diesel particulate filter for collecting the particulate matter, and a lattice pattern disposed on at least one side of both sides of the filter and in communication with the aeration passage of the filter, and supplies power. And an electrode portion for heating the filter, wherein the plurality of partition regions of the lattice pattern of the filter are alternately formed by an opening and a closing hole.

Here, the grid pattern of the electrode portion is formed of the communication opening and the communication closure alternately corresponding to the grid pattern of the filter, the opening of the filter and the communication opening of the electrode portion is preferably in communication with each other.

The apparatus may further include a partition member that divides the internal space of the filter into at least two collection zones in which particulate matter is collected.

The partition member is preferably provided with an insulating member which is an insulator for mutual insulation and insulation of each of the collecting zones.

Here, preferably, a plurality of electrode parts may be provided to correspond to the collection area partitioned into at least two or more parts.

Preferably, the electrode part is provided with a pin inserted into the filter's closed port to enhance electrical contact with the filter.

Preferably, the electrode unit may be provided with at least one lead wire attached to the closed opening of the filter.

The filter is preferably made of a ceramic material containing silicon carbide (SiC).

More preferably, the filter may be coated with an oxidation catalyst or a reduction catalyst.

On the other hand, according to the present invention, there is provided a filter assembly of the above-described configuration, the housing housing the filter assembly, the exhaust gas is discharged from the engine; A power supply unit supplying power to the electrode unit; A temperature sensing unit disposed inside the housing and sensing a temperature of the filter; Also based on the signal sensed by the temperature sensing unit, it is also made by a particulate matter reduction device, characterized in that for controlling the operation of the power supply so that the temperature of the filter maintains a predetermined temperature range.

The power amplifier may further include a power amplifier configured to amplify power from the power supply and supply the power to the electrode.

Preferably, the amplification factor of the power amplifier may be controlled by the controller.

Specific details of other embodiments are included in the detailed description and drawings.

Therefore, according to the above-mentioned means, the opening of the filter and the opening of the electrode portion communicate with each other to secure the air permeability of the exhaust gas, thereby preventing a decrease in pressure and a decrease in the efficiency of the filter, thereby improving the reliability of the product. There is provided a filter assembly and an exhaust gas reducing device comprising the same.

In addition, the filter assembly and the exhaust gas including the same can be formed on the both sides of the filter by alternating openings and closing holes to prevent the back flow of the exhaust gas flowing into the filter to be re-introduced into the filter and to efficiently recycle An abatement device is provided.

Effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the claims.

Advantages and features of the present invention, and the configuration and method for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. For reference, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Prior to the description, preferred embodiments of the present invention are divided into first and second embodiments. Here, in the first and second embodiments of the present invention it is noted that the same names are denoted by the same reference numerals.

1 is a schematic cross-sectional view of an exhaust gas reducing device according to a preferred embodiment of the present invention.

As shown in Figure 1, the exhaust gas reducing device 1 according to a preferred embodiment of the present invention is a housing 100, filter assembly 300, power supply unit 500, power amplifier 600, temperature sensing The unit 700 and the controller 900 are included.

The housing 100 includes a housing body 102, an inlet 104 and an outlet 106. The housing body 102 accommodates the filter assembly 300, and both sides of the housing body 102 are formed with an inlet 104 through which exhaust gas flows in and an outlet 106 through which exhaust gas flows out. And, the housing body 102 is provided in a cylindrical shape in consideration of the flow resistance of the exhaust gas flowing therein.

Here, the inlet 104 and the outlet 106 through which the exhaust gas flows in and out are formed at both sides of the housing body 102 along the longitudinal direction of the housing body 102. Of course, in one embodiment of the present invention, the inlet 104 and the outlet 106 is formed in the longitudinal direction of the housing body 102, the inlet 104 and the outlet 106 is the longitudinal direction of the housing body 102 It may be formed in the transverse direction with respect to.

The housing 100 serves to guide the exhaust gas discharged from the diesel engine (not shown) (hereinafter, referred to as an engine) into the filter assembly. In addition, the housing 100 guides an exhaust gas in which particulate matter (PM) is collected in the filter assembly 300 to a muffler (not shown). That is, the housing 100 receives exhaust gas discharged from the engine through the inlet 104 and discharges the exhaust gas from which particulate matter is removed by the filter assembly 300 to the muffler through the outlet 106. .

Next, FIG. 2 is an exploded perspective view of the filter assembly according to the first embodiment of the present invention, FIG. 3 is a perspective view of the filter assembly according to the first embodiment of the present invention, and FIG. 4 is a side view of the filter assembly shown in FIG. 5 is a cross-sectional view taken along the line VV of FIG. 3.

The filter assembly 300 includes a filter 320 and an electrode unit 340, as shown in FIGS. 2 to 5. The filter assembly 300 collects particulate matter contained in the exhaust gas discharged from the engine.

The filter 320 is an exemplary embodiment of the present invention. A diesel diesel particulate filter 320 is disposed on a flow path through which exhaust gas is discharged from an engine and collects particulate matter included in exhaust gas. to be. In addition, the filter 320 includes, as an embodiment of the present invention, a filter body 322, an air passage 324, an opening 326, and a closed opening 328. The filter 320 is made of a ceramic material including silicon carbide (SiC) as an embodiment of the present invention.

The filter body 322 forms the appearance of the filter 320. An air flow passage 324 is formed inside the filter body 322, and the particulate matter contained in the exhaust gas flowing through the air flow passage 324 is collected in the filter body 322.

And both sides of the filter body 322 is partitioned by the grid pattern, the area partitioned in the grid pattern is formed by the ventilation passage 324. That is, the ventilation passage 324 is formed in the filter body 322 by the number of partition regions partitioned by the grid pattern. Hazardous substances in the exhaust gas passing through the ventilation passage 324 are collected by a partition wall partitioning the inside of the filter body 322 into the plurality of ventilation passages 324.

The plurality of grid-shaped partition regions formed in the filter body 322 are alternately formed by the opening 326 and the closing opening 328. That is, the opening 326 and the closing opening 328 are formed in contact with each other. These openings 326 and the closing opening 328 open and close the respective air flow passages 324.

On the other hand, the opening 326 and the closing opening 328 formed in the filter body 322 is formed of the closing opening 328 and the opening 326 with respect to the ventilation passage, respectively. That is, an opening 326 is formed at one side of the filter body 322, and a closing hole 328 is formed at the other side of the ventilation passage 324 communicating with the opening 326. Thus, the opening 326 and the closing hole 328 are formed in both directions based on the ventilation passage 324, so that the exhaust gas flowing through the opening 326 flows to the adjacent ventilation passage through the porous partition wall and passes through the partition wall. In the process, the particulate matter is collected and discharged to the opening of the adjacent ventilation passage 324 formed on the other side of the filter body 322.

Next, the electrode unit 340 is disposed on at least one side of both sides of the filter 320 and is provided in a grid pattern in communication with the air flow passage 324 of the filter 320. The electrode unit 340 serves to heat the filter 320 by receiving power from the power supply unit 500. Here, the electrode unit 340 is disposed on both sides of the filter 320 as an embodiment of the present invention.

The electrode unit 340 of the present invention includes an electrode unit body 342, a communication opening 344, a communication closing opening 346, and a lead wire 348.

The electrode body 342 forms an outer appearance of the electrode body 342 and is provided in a disc shape corresponding to the cross-sectional shape of the cylindrical filter 320. The electrode body 342 is disposed in contact with the filter 320 to serve to heat the filter 320. As the filter 320 is heated by the power supplied to the electrode body 342, the harmful substances collected in the filter 320 are burned.

The communication opening 344 and the communication closing opening 346 are alternately formed in the electrode body 342 in a lattice pattern. Here, the communication opening 344 communicates with the opening of the filter 320. As the communication opening 344 of the electrode body 342 and the opening 326 of the filter 320 communicate with each other, exhaust gas flowing into the filter 320 is passed through the electrode body 342 without any flow resistance. Flow to furnace 324.

The electrode 340 may be provided with a pin inserted into the closed part of the filter 320 to increase electrical contact with the filter 320.

In one embodiment of the present invention, the electrode portion 340 is disposed to have a smaller cross-sectional area on the side of the filter 320, the size may be changed in consideration of the amount of heat supplied to the filter 320. In addition, the shape of the electrode unit 340 may be provided in a rectangular shape and the like different from the cross-sectional shape of the filter 320. At this time, the communication opening 344 should be in communication with the opening of the filter 320.

The lead wire 348 electrically connects the electrode body 342 and the power supply unit 500 to each other. The lead wire 348 transfers power from the power supply unit 500 to the electrode body 342 so that the filter 320 may be heated by the electrode body 342.

The lead wires 348 may be installed in the communication closing hole 346 of the filter 320 so as not to impede the flow of the exhaust gas, and a plurality of lead wires 348 may be provided when the current density supplied to one lead wire 348 is large.

The power supply unit 500 is composed of a battery for generating a voltage of 12V or 24V. The power supply unit 500 supplies power to the electrode unit 340. The power supply unit 500 is electrically connected to the electrode unit 340.

The power amplifier 600 is disposed between the power supply unit 500 and the electrode unit 340. The power amplifier 600 amplifies the power supplied to the electrode unit 340 to a high voltage so that the filter is heated by the electrode unit 340.

The temperature sensing unit 700 is disposed inside to sense the temperature of the filter 320. The temperature detector 700 transmits the detected signal to the controller 900.

The control unit 900 controls the operation of the power supply unit 500 so that the temperature of the filter 320 maintains a preset temperature range based on the signal sensed by the temperature sensing unit 700. The controller 900 controls the power amplification factor of the power amplifier 600 to amplify the power supplied from the power supply unit 500 to the electrode unit 340.

6 is a side configuration diagram of the filter assembly according to the second embodiment of the present invention.

Unlike the first embodiment of the present invention, the filter assembly 300 according to the second embodiment of the present invention includes a partition member 360 that divides the internal space of the filter 320 into at least two collection zones. .

Here, the partition member 360 has an '+' shape so that the inner space of the filter 320 is partitioned into four capture zones as an embodiment of the present invention. Of course, the partition member 360 is provided in various shapes, unlike the embodiment of the present invention, it is possible to partition the inner space of the filter 320 into two, three and more than four collection zones. In addition, the partition member 360 is provided as a heat insulating member for mutual insulation of each collection zone. In addition, the partition member 360 is provided as an insulator for mutual electrical insulation of each collection zone. As the partition member 360 used as an embodiment of the present invention, insulating concrete, which is an insulator, was used.

A plurality of electrode parts 340 are provided to heat the plurality of filter 320 collecting zones partitioned by the partition of the partition member 360, respectively. Of course, a communication opening 344 communicating with the opening 326 of the filter 320 is also formed in the electrode unit 340 of the second embodiment as in the first embodiment.

As shown in FIG. 6, four electrode portions 340 are provided for the four capture zones and disposed on the filter 320. The shape of the electrode unit 340 is provided corresponding to the shape of the filter 320 partitioned into the collecting zone. However, the shape of the electrode part 340 may have a shape such as a circle irrelevant to the shape of the filter 320, and the cross-sectional area of the electrode part 340 may be the same as that of the filter.

Here, in the second embodiment of the present invention, a plurality of temperature sensing units 700 may be provided to sense the temperature of each collection zone. The control unit 900 may control the operation of the power supply unit 500 so that power is independently applied to each electrode unit 340 based on the signal detected by each temperature sensing unit 700.

The operation of the exhaust gas reducing device 1 according to the preferred embodiment of the present invention according to such a configuration will be described below.

Prior to the description, the first and second embodiments of the present invention will be described separately.

Exhaust gas reduction apparatus 1 according to the first embodiment of the present invention is an electrode portion 340 having a grid pattern on both sides of the filter 320 having a plurality of ventilation passages 324 formed by a grid-shaped section ).

At this time, the lattice pattern of the filter 320 is alternately the opening 326 and the closing opening 328, the openings 326 and the closing opening 328 formed on both sides of the filter 320 are alternately provided aeration The exhaust gas introduced into the flow path 324 is prevented from flowing back.

In addition, the electrode part 340 has a communication opening 344 communicating with the opening 326 of the filter 320 to secure air permeability of the exhaust gas flowing into the filter 320.

The controller 900 controls the operation of the power supply unit 500 to burn the harmful substances collected in the filter 320 based on the signal sensed by the temperature detector 700. In addition, the control unit 900 controls the power amplifier 600 so that the power from the power supply unit 500 is amplified and supplied to the electrode unit 340.

On the other hand, the exhaust gas reducing device 1 according to the second embodiment of the present invention is the same as the series of operating process of the first embodiment of the present invention, the filter 320 is four collection zones by the partition member 360 It is divided into

In addition, four electrode parts 340 are disposed to correspond to the filter 320 partitioned into four collection zones. The four electrode units 340 are selectively powered by the control of the controller 900. That is, the control unit 900 may control the operation of the power supply unit 500 to selectively supply power to the four electrode units 340 based on the signal of the temperature sensing unit 700 disposed in each collection zone. Can be.

Accordingly, the opening of the filter and the electrode portion communicate with each other to secure the air permeability of the exhaust gas, thereby preventing a decrease in pressure and a decrease in the efficiency of the filter, thereby improving product reliability.

In addition, openings and closing ports may be alternately formed on both sides of the filter to prevent a backflow shape in which exhaust gas flowing into and out of the filter is re-introduced into the filter.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

1 is a schematic cross-sectional view of an exhaust gas reducing apparatus according to a preferred embodiment of the present invention;

2 is an exploded perspective view of a filter assembly according to a first embodiment of the present invention;

3 is a combined perspective view of a filter assembly according to a first embodiment of the present invention;

4 is a side configuration diagram of the filter assembly shown in FIG. 3;

5 is a cross-sectional view taken along the line VV of FIG. 3;

6 is a side configuration diagram of a filter assembly according to a second embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

  1: exhaust gas reducing device 100: housing

104: inlet 106: outlet

300: filter assembly 320: filter

322: filter body 324: aeration flow path

326: opening 328: closed

340: electrode portion 342: electrode portion body

344: communication opening 346: communication closing

500: power supply unit 600: power amplifier unit

700: temperature detection unit 900: control unit

Claims (12)

A gas flow passage through which exhaust gas is discharged from the engine, and a ventilation passage through which the exhaust gas flows is formed by a grid-shaped section, and a cylindrical diesel particulate material which collects particulate matter contained in the exhaust gas on the ventilation passage. With the Diesel Particulate Filter: It is disposed on at least one side of the both sides of the filter and has a grid pattern shape in communication with the ventilation flow path of the filter, and includes an electrode unit for heating the filter by receiving power, The filter assembly characterized in that the plurality of partitions of the grid pattern shape of the filter are alternately formed by the opening and the closing port. The method of claim 1, The grid pattern of the electrode portion is formed of the communication opening and the communication closure alternately corresponding to the grid pattern of the filter, And said opening of said filter and said communication opening of said electrode portion communicate with each other. The method of claim 1, And a partition member for dividing the inner space of the filter into at least two collection zones in which particulate matter is collected, respectively. The method of claim 3, The partition member is a filter assembly, characterized in that the insulating member is provided as a heat insulation for mutual insulation and insulation of each of the collecting zone. The method of claim 3, And a plurality of electrode parts arranged to correspond to the collection area partitioned into at least two or more parts. 3. The method of claim 2, The electrode assembly is a filter assembly, characterized in that the pin is inserted into the closed hole of the filter to strengthen the electrical contact with the filter. 3. The method of claim 2, The electrode assembly is characterized in that at least one lead wire is attached to the closed opening of the filter. The method of claim 1, The filter assembly, characterized in that made of a ceramic material containing silicon carbide (SiC). The method of claim 1, The filter assembly, characterized in that the filter is coated with an oxidation catalyst or a reduction catalyst. A filter assembly according to any one of claims 1 to 9; A housing accommodating the filter assembly and installed on a flow path through which exhaust gas is discharged from an engine; A power supply unit supplying power to the electrode unit; A temperature sensing unit disposed inside the housing and sensing a temperature of the filter; And a controller configured to control an operation of the power supply unit to maintain a predetermined temperature range of the filter based on the signal sensed by the temperature sensing unit. The method of claim 10, And a power amplifier for amplifying the power from the power supply and supplying the electrode with high voltage. The method of claim 11, The amplification ratio of the power amplifier is controlled by the control unit exhaust gas reduction device, characterized in that.

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