KR100490067B1 - Filter for diesel particulate filter trap system embedding electric heater - Google Patents

Abstract

The present invention relates to a filter for a soot filtration device incorporating an electric heater, and more particularly, by embedding the electric heater inside a porous filter and using it as an auxiliary heat source, the heater directly contacts the collected particulate matter or generates radiant heat. It is about improving soot regeneration performance even with less electric energy. In order to achieve the above object, the present invention provides a filter obtained by laminating and sintering a porous plate having an electric heater and a porous plate having a partition therein, and a filter in which a cartridge heater is inserted after laminating and sintering a porous plate having a partition. . The electric heater may be formed in the form of a metal plate, or may be used in the form of sintered by inserting a hot wire coil. In addition, the electric heater may be incorporated in the porous plate to be integrally formed. Providing such a filter for the soot filtration device can reduce the volume occupied by the peripheral devices due to the heater, and can reduce the burden of electrical energy required during regeneration.

Description

     FILTER FOR DIESEL PARTICULATE FILTER TRAP SYSTEM EMBEDDING ELECTRIC HEATER}

The present invention relates to a filter for a soot filtration device incorporating an electric heater, and more particularly, by embedding the electric heater inside a porous filter and using it as an auxiliary heat source, the heater directly contacts the collected particulate matter or generates radiant heat. It is about improving soot regeneration performance even with less electric energy.

With the development of modern society, as the amount of people's movement increases, the utilization of transportation including cars is exploding. As the traffic volume increases, various problems are emerging. Among them, the problem of pollution caused by the use of fossil fuels is especially important in large cities. Carbon dioxide, sulfides, and nitrides (NO _x , Knox) generated by the combustion of fossil fuels used as fuels for automobiles are the main causes of environmental pollution. In particular, significant environmental pollution occurs due to ozone layer destruction by Freon, N ₂ O gas, and acid rain by SO _x and NO _x components. In addition, the human body mainly affects the respiratory and neurological disorders. In particular, ozone generation due to photochemical reaction between HC and NO _x and PM (particulate matter) have recently been found to be the cause of lung cancer. There is a growing interest in the effects on the human body. Therefore, research and development to reduce this have been conducted.

In order to reduce harmful emissions due to the combustion of fossil fuels, technologies for reducing pollutants in the engine itself, that is, engine technology and pretreatment technology, have been developed. There are limitations to satisfying regulations alone, making it necessary to apply aftertreatment technology to treat exhaust gases already burned in engines.

Examples of after-treatment technologies for diesel vehicles include oxidation catalysts, NO _x catalysts, and soot filters. Among them, diesel particulate filter traps (DPFs) are the most efficient and practical approaches. This device is a technology that collects particulate matter and soot discharged from diesel engine in filter, burns it, recycles it, and collects particulate matter and continues to use it. And economics are acting as obstacles to practical use.

The soot filtration device basically consists of three parts: filter, regeneration device and control device. Apart from the control device, the filter and the regeneration device will be described in more detail below.

First of all, ceramic cordierite filters are most commonly used as filters, and silicon carbide filters (SiC), ceramic integrated filters, and metal powder filters are also used. The ceramic filter or silicon carbide filter has a circular or oval cylindrical cross section, and a small triangular or square exhaust channel having a diameter of several mm in the axial direction has a honeycomb shape. The honeycomb super honeycomb evenly distributes the torsion in six directions to smooth the air flow.

Patent application 1995-7753 describes such a typical honeycomb type filter. Patent application No. 195-7753 uses a ceramic honeycomb filter to remove particulate matter from diesel vehicles, and blocks a portion of the center of the filter to form a clogged portion to remove particulate matter from exhaust gas emitted from diesel vehicles and improve durability. I'm making it. In addition, the honeycomb filter is characterized in that the shape of the circle, ellipse, triangle, square or hexagon.

The honeycomb-type porous ceramic filter is manufactured in the form of an extrusion, plugging one inlet to prevent plugging, and passing the exhaust gas through the porous wall to filter it. Therefore, the plugging process for blocking each hole is difficult, and automation is not easy, and since the sintering has to be performed several times, the manufacturing process becomes complicated and the manufacturing cost increases. In addition, in the case of using a honeycomb-type solid porous ceramic filter, there is a disadvantage in that the molding cost is high and uniform heating is difficult, so that cracking due to high temperature is likely to occur. In the case of such a ceramic honeycomb, there is a limit that the hole is too small to install a heater.

In order to solve such a problem, a cross-flow filter has been developed in which a plurality of partitions are formed on a substrate to form a porous plate, and the porous plates are laminated and sintered so that the partition walls are different from each other.

Patent application No. 1996-041551 relates to this, and describes a crossflow filter. In patent application No. 1996-041551, a ceramic green sheet having a constant thickness is manufactured by using a tape casting method, and the embossing process is performed. The ceramic filter manufacturing method for removing the dust and particulate matter which generate | occur | produces in exhaust gas, such as these, is described.

5a and 5b show a cross flow filter according to the prior art. 5A illustrates a porous plate in which a conventional partition wall is formed, and a plurality of partition walls are formed on a substrate at regular intervals. As shown in Fig. 5B, the porous plates having the partition walls are stacked in this manner, but the stacks are alternately alternately arranged. In this case, since the inlet and the outlet of the passage are alternately blocked, the exhaust gas flowing into the channel inlet passes through the porous wall and exits to the side channel outlet, and particulate matter (PM) is collected in the inflow passage. However, the ceramic filter having such a structure has a problem that the filter price is quite expensive because the manufacturing process is complicated and the secondary molding operation is required again after alternately blocking the passages at both ends after the primary molding.

On the other hand, a regeneration device, which is one of the elements of the soot filtration device, is required to remove particulate matter and to continue using the filter after collecting particulate matter and soot into the filter. The regeneration method of the regeneration device is a technology that burns and regenerates the trapped material, and collects and reuses the particulate material and continues to use it. An active regeneration type that separates and burns particulate matter by forcibly supplying a heat source chemically or electrically. It can be divided into two types, passive regeneration type, in which regeneration is performed by only exhaust gas without supply.

In the forced regeneration method, the collected particulate matter is heated by an external heat source to an ignition temperature of 550 ° C. to 600 ° C., and an electric heater method, a burner method, and a throttling method are used. In addition, the forced regeneration method collects particulate matter through a collecting filter and then directly burns particulate matter through a burner or electric heater, or heats it to a temperature at which it can be burned. Due to severe failures and shortened lifespan, when a large amount of soot is collected and regenerated, abnormal burn may occur, resulting in damage to the filter.

The natural regeneration method is a method of lowering the ignition temperature of particulate matter by using a catalyst or additive and continuously burning it with engine exhaust gas. Metal materials such as iron (Fe), cerium (Ce), copper (Cu), and platinum (Pt) Fuel additives to lower the regeneration temperature of particulate matter by mixing it with fuel, Oxidation catalyst filter trap to burn particulate matter by coating precious metals such as platinum on the filter surface, and catalyst to shear In addition, there are catalyst-trap combinations installed at the rear stage of the collecting filter.

Natural regeneration is preferable because of its simple structure and low breakdown. However, it is currently being developed. However, when driving at a low temperature for a long time, particulate matter in the vehicle exhaust gas is not burned and accumulated inside the filter to damage the filter or operate the vehicle. Can make it impossible.

Therefore, a semi-passive type that uses a forced regeneration device as a natural regeneration method has been developed. In this case, electric heaters are used a lot as auxiliary heat sources, but most of them are installed outside the filter, and the method of increasing the temperature of the exhaust gas by adding energy of the electric heater to the exhaust gas, and radiant heat of the electric heater are collected inside the filter. The method of regenerating particulate matter by direct delivery to the particulate matter is applied.

City driving conditions may vary depending on the city, vehicle, and driver, but in general, the driving time required for the full load of the vehicle is less than 15% of the total driving time, 45% of which requires no power, and the rest are all Only 30% to 40% of the output is required. Therefore, the auxiliary heat source supply device such as a burner or a heater is essential to ensure the durability of the filter and the device and to minimize the output loss of the vehicle in the natural regeneration method using an additive or a catalyst as well as a forced regeneration method.

U.S. Patent 5,780,811 shows this specific example. According to US Pat. No. 5,780,811, a method for burning dust collected by a thin plate filter by applying a current to a lattice heating wire is burned. When a high temperature region is generated in the thin film filter, the current flowing in the portion of the lattice-shaped hot wire corresponding to the same region is reduced.

In such a case, since the lattice-shaped heating lamp is disposed and its structure is not only complicated, but also connected to an external power source, the grid-heater lamp has a problem in that a volume increases due to the use of an external power source.

In summary, in the case of using the heater as described above, there is a disadvantage in that the amount of electricity supplied to the heater is increased and the electrical energy consumption is large. That is, in order to heat the heater, power of 3kw to 4kw is required, and an additional power supply device such as an engine generator or a battery size increases, as well as an expensive problem.

In the present invention, it is possible to solve the problem of the above-described prior art in the soot filtration device, that is, difficult to manufacture and high production cost in the case of the filter used in the soot filtration device, as well as the electrical energy according to the use of the heater in the regeneration device It can solve the problem of excessive consumption.

In the case of the filter in the soot filtration device, as described above, the honeycomb filter is complicated and expensive, and the present invention provides a method for improving such a molding method. In order to improve such a molding method, the present invention particularly provides a method of forming a filter by laminating porous plates.

In addition, in the case of a regeneration device in a soot filtration device, a heat source is required for regeneration, and in the related art, a heater or a burner is used as an auxiliary regeneration heat source supply device to provide such a heat source. Since the device is large and the number of parts has been a cause of frequent failures, in particular, the electric energy supplied to the heater is excessive, there is a problem that the vehicle is too crowded. The present invention proposes a solution to this problem.

The present invention relates to a filter for use in a soot filtration apparatus, wherein the filter of the present invention comprises a plurality of inlet-side porous plates formed by attaching an electric heater on a first porous substrate, and formed with a passage for moving exhaust gas, and a second porous. A plurality of barrier ribs are formed integrally with the substrate in a parallel direction on the substrate, and includes a plurality of outlet side porous plates on which a movement passage of the exhaust gas is formed by the plurality of barrier ribs. In the filter of the present invention, the inlet-side porous plate and the outlet-side porous plate are alternately laminated so that the exhaust gas flows into the inlet-side porous plate, passes through the porous substrate up and down, and is discharged via the outlet-side porous plate.

In the filter for particulate filter of the present invention, it is preferable that the electric heater is formed on the first porous substrate in the same pattern as the partition formed on the second porous substrate so that the electric heater itself acts as a partition. In this case, the electric heaters are preferably formed of metal plates and interconnected.

In the porous substrate at the inlet side of the present invention, a partition wall may be further formed, and an electric heater may be embedded in the partition wall further formed. In this case, it is preferable to manufacture an electric heater with a coil type hot wire.

Moreover, in this invention, it is preferable to form a diaphragm in which both ends alternately alternately, and to divide a diaphragm alternately up and down in the both ends of the movement path | route of the exhaust gas formed by the partition of the exit side porous plate.

In the present invention, the heater can be manufactured so that the direction in which the electric heater of the inlet-side porous plate is installed and the direction in which the partition wall of the outlet-side porous plate are formed cross each other at right angles or are the same.

In addition, the diaphragm may be integrally formed on one surface on the first porous substrate to which the electric heater of the present invention is attached, so that one end of the exhaust gas may be blocked in the movement passage of the exhaust gas.

In the present invention, the diaphragm may be alternately alternately formed at both ends in the longitudinal direction of the electric heater on one surface on the first porous substrate to which the electric heater is attached.

In addition, in the present invention, a plurality of barrier ribs are integrally formed with the substrate in a parallel direction on the porous substrate, and a plurality of inlet-side porous plates and outlet-side porous plates are formed in which a plurality of barrier ribs are formed to move exhaust gas. Can be. In addition, after stacking and sintering a plurality of porous plates, an electric heater may be inserted into a moving passage to manufacture the same.

Further, in the filter of the present invention, the diaphragms are alternately alternately formed at both ends of the moving passage of the exhaust gas formed by the partition wall of the porous plate, and the diaphragm can be alternately alternated up and down.

In addition, the electric heater inserted on the moving passage may be a cartridge heater in which one end is electrically connected to each other.

In the filter of the present invention, the inflow direction of the exhaust gas in the inlet porous plate and the discharge direction of the exhaust gas in the outlet porous plate can be crossed or coincident with each other at right angles.

In addition, in the filter of the present invention, a plurality of inlet-side porous plates and a second porous substrate are integrally formed on the first porous substrate and integrally formed with the substrate in a parallel direction on the second porous substrate. The barrier rib may include a plurality of outlet-side porous plates having a moving passage of the exhaust gas. The inlet-side porous plate and the outlet-side porous plate may be alternately stacked so that the exhaust gas flows into the inlet-side porous plate and passes through the porous substrate up and down, and then is discharged through the outlet-side porous plate.

In the filter of the present invention, the diaphragms are alternately alternately formed at both ends of the moving passage of the exhaust gas formed by the partition wall of the outlet-side porous plate, and the portions blocking both ends are alternately alternately up and down.

The electric heater of the present invention can form a plurality of hot wires in a lattice shape, or can be formed in a zigzag in a direction parallel or perpendicular to the partition wall of the exit-side porous plate.

In all such cases of the invention, the heat of the heater is made small because the amount of heat supplied from the heater must be sufficient to burn the soot, it must be inserted into a small cell of the filter, and it must not disturb the flow of the exhaust gas. . In addition, when a filter is formed by stacking a porous plate formed by installing a heater on a substrate and then sintering, a heater that can withstand the sintering temperature of the filter and maintains physical properties is used. Such heaters may use metal heaters used in metal filters for gasoline three-way catalysts.

In addition, in order to bond the porous plate made of ceramic, an adhesive capable of withstanding high temperatures while maintaining airtightness between the heater and the filter is used.

The filter for particulate filter of the present invention includes a plurality of porous plates composed of a heater or a hot linear heater in the form of a metal plate, and a substrate capable of filtering particulate matter.

Hereinafter, a filter for a soot filtration device incorporating an electric heater according to the present invention will be described in detail with reference to the accompanying drawings.

A first embodiment of the present invention will be described with reference to Figs. 1A to 1C.

1A to 1C illustrate a filter in which a porous plate provided with a cross-flow electric heater and a porous plate formed with partition walls are alternately stacked, according to a first embodiment of the present invention.

1A is a perspective view showing a porous plate according to a first embodiment of the present invention. As shown in FIG. 1A, a plurality of electric heaters 11 are formed at regular intervals on a porous substrate 12 composed mainly of ceramics or the like, and then interconnected. As the material of the filter, a porous material such as ceramic or silicon carbide is used. Such porous materials are usually designed to withstand temperatures up to 1000 ° C. and up to 1400 ° C. and thus have heat resistance. The heater 11 is preferably formed in a metal plate shape and is formed on the porous substrate 12.

FIG. 1B shows a method of forming a filter by alternately stacking a porous plate provided with such an electric heater and a porous plate having partition walls. As shown in FIG. 1B, in the present invention, the filter of the present invention is formed by alternately stacking the porous plate on which the heater 11 as shown in FIG. 1A and the porous plate on which the partition wall 13 is formed. In this case, the heater 11 is attached to the partition 13 of the porous plate in the same pattern.

FIG. 1C is a view illustrating a method of forming a filter by alternately stacking a porous plate provided with an electric heater and a porous plate having partitions, and is characterized in that the form is different from that of the partition 13 of FIG. 1B. In other words, the filter of the present invention shown in Fig. 1C is formed by alternately blocking the exhaust gas movement passages at both ends of the porous plate using the diaphragm 16. Therefore, it is in the form which restricts the movement of exhaust gas.

The exhaust gas flows into the passageway of the inlet-side porous plate on which the heater 11 is formed, passes through the porous plate formed above and below, and is discharged toward the passageway of the outlet-side porous plate on which the partitions 13 and 16 are formed. Since the heater 11 is directly installed in the filter in which the particulate matter is collected, the particulate matter can be efficiently combusted with little energy. In addition, the inlet-side porous plate is formed with a diaphragm 15 to block the exhaust gas from escaping.

For this process, it is possible to continuously use a filter capable of regenerating and efficiently filtering soot by alternately stacking two porous plates having different characteristics and covering the top plate 14 on the top to form a filter. At the time of lamination of the porous plates, these porous plates can be adhered with an adhesive and used.

In the first embodiment of the present invention, a porous plate capable of filtration of particulate matter or the like is used, and an electric heater 11 made of a metal plate is inserted into the porous plate so that the filter can be regenerated and used continuously. Can be achieved. In addition, since the filter is formed in a structure including an electric heater therein, there is no need to provide an electric heat source separately to the outside, there is no problem caused by the increase in volume.

A second embodiment of the present invention will be described with reference to Figs. 2A to 2E.

2A is a perspective view illustrating a porous plate according to a second embodiment of the present invention, and FIGS. 2B to 2E illustrate a method of forming a filter by stacking porous plates according to a second embodiment of the present invention. 2B to 2E show a method of forming a filter by stacking porous plates according to the second embodiment of the present invention, but there are differences in the stacking direction and shape of the porous plate. This difference is described in detail below.

In FIG. 2A, as shown in the drawing, in the second embodiment of the present invention, a plurality of hot wire coils 21 are inserted and formed at the partition wall positions of the porous plate. The porous plates into which the plurality of hot wire coils 21 are inserted and the porous plates on which the partition walls are formed are alternately stacked and sintered to form a filter as shown in FIGS. 2B to 2E.

In the second embodiment of the present invention, the filter is regenerated by using a porous plate capable of filtration of particulate matter and the like, and forming a partition wall in which the hot wire coil 21 is inserted in the porous plate to burn off and remove particulate matter. Make it available. In addition, since the inside of the filter is formed in a structure including a hot wire coil, there is no need to provide an electric heat source separately to the outside, so there is no problem caused by the increase in volume.

The exhaust gas flows into the inlet-side porous plate in which the partition wall into which the heating coil is inserted is formed, passes through the upper and lower porous plates, and is discharged to the outlet along the moving passage of the outlet-side porous plate in which the partition wall is formed. On the contrary, the exhaust gas may flow into the inlet-side porous plate in which the partition wall is formed, pass through the upper and lower porous plates, and be discharged to the outlet along the moving passage of the outlet-side porous plate into which the hot wire coil is inserted.

2B is a view showing a lamination method in which a partition wall into which a hot wire coil is inserted and a porous plate on which a movement path of exhaust gas is alternately stacked are formed so that the movement directions of the exhaust gas cross at right angles to each other. As in the lamination method shown in Fig. 2B, the inlet-side porous plate into which the hot wire coil is inserted and the outlet-side porous plate having the partition wall are alternately laminated, and then the upper plate 24 is laminated on the top to form the filter of the present invention.

Although FIG. 2C shows the method of laminating | stacking a porous board similarly to FIG. 2B, the formation form of the movement path of exhaust gas in an exit side porous board differs from FIG. 2B. That is, in FIG. 2C, the diaphragm 25 may be formed on one side of the movement passage of the exhaust gas so as to block the movement of the exhaust gas. In this case, in order to smoothly pass the exhaust gas, the exhaust gas passages are alternately shifted up and down when laminating the exit porous plate and the inlet porous plate.

2D and 2E show yet another embodiment of the second embodiment of the present invention in which the partitions of the same type as those shown in FIGS. 2B and 2C are stacked. As shown in Fig. 2D and Fig. 2E, the inflow direction of the exhaust gas and the movement passage of the porous plate into which the hot wire coil is inserted may be formed in the same direction. In FIG. 2E, in particular, the exhaust gas passages are alternately shifted up and down when the porous plates are stacked in order to smoothly pass the exhaust gas.

Next, a third embodiment of the present invention will be described with reference to FIGS. 3A and 3B.

FIG. 3A shows a filter of a soot filtration device with a cartridge heater according to a third embodiment of the invention, and FIG. 3B shows another form of a third embodiment of the invention.

As shown in FIG. 3A, in the third embodiment of the present invention, after stacking and sintering a plurality of porous plates having partition walls, a cartridge heater 31 is manufactured and a filter inserted into the plurality of porous plates is used. The cartridge heater 31 may be manufactured in a manner that does not disturb the flow of the exhaust gas, and may be inserted into a heater in the form of a cartridge instead of the partition wall on the porous plate. This cartridge heater 31 is fixed in the filter so that there is no fluctuation due to the flow of the exhaust gas.

3A shows a filter used when the inflow direction and the exhaust direction of the exhaust gas cross at right angles, and FIG. 3B shows a filter used when the inflow direction and the discharge direction of the exhaust gas are the same. Accordingly, in the case of FIG. 3A, the partition wall direction of the porous plate intersects at right angles, while in the case of FIG. 3B, the partition wall direction is the same.

Accordingly, in the filter shown in FIG. 3A, the exhaust gas flows through the porous substrate stacked up and down after the exhaust gas flows in the inlet side, and is then discharged in a direction perpendicular to the inlet side. . In the filter shown in FIG. 3B, since the inlet and outlet sides are the same, the exhaust gas flowing into the filter is filtered and heated through a porous substrate stacked up and down, and then discharged in the same outlet direction as the inlet direction.

3A and 3B, the movement paths of the exhaust gas in the upper and lower partitions are alternately stacked up and down to allow the exhaust gas to pass smoothly.

When voltage is applied to the entire cartridge heater 31 at the same time according to the third embodiment of the present invention, a current flows and short-circuit or short-circuit may cause short circuit or short circuit. Preference is given to using.

The cartridge heater 31 of the present invention is capable of supplying the heat required for the minimum space by injecting the maximum amount of heat in the minimum area, and is easy to use only by punching a metal, a hot plate, a casting, or the like to be heated. It is durable and can be easily mounted and used in the hole to be heated even when it is impossible to adopt another heater. The cartridge heater is used for hot sheet metal heating, automatic packaging machine, compression die, rubber molding heater, liquid heater, and the like, and a heating coil is fixed at the center thereof to transmit a high amount of heat. In particular, the cartridge heater 31 is suitable when a large amount of heat is required in a limited space as in the present invention.

Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. 4A to 4C.

Figure 4a is a view showing a method for forming a hot wire embedded in a porous plate in a lattice form according to a fourth embodiment of the present invention, Figure 4b is a plurality of heating wire exit side porous plate according to a fourth embodiment of the present invention 4C is a view illustrating a method of embedding and forming a plurality of hot wires in a direction orthogonal to a partition wall of an exit porous plate according to a fourth embodiment of the present invention. The figure shown.

As shown in FIG. 4A, the inlet-side porous plate according to the fourth embodiment of the present invention laminates an electric heater 41 made of hot wire on a porous substrate 42, and then alternates with the porous plate on which the diaphragm 43 is formed. It is made by laminating. The partition layer here collects soot and PM. 4A illustrates an example in which the heating wires of the electric heater 41 are arranged side by side in the horizontal and vertical directions to form a lattice shape. As shown in Fig. 4A, the heater of the present invention is formed by alternately stacking the porous plate in which the electric heater is incorporated and the porous plate on which the partition wall is formed, and covering the upper plate 44.

In addition, the diaphragm 43 is formed so that both ends of the movement path | route of the exhaust gas may be alternately alternately formed in a porous plate, and the movement of exhaust gas is interrupted | blocked.

4B and 4C illustrate another arrangement form of the heating wire constituting the electric heater in the fourth embodiment of the present invention.

Figure 4b shows a method for manufacturing a heater-embedded filter of the present invention comprising a porous plate formed by zigzag-heating the heating wire constituting the electric heater, the arrangement of the heating wire in the same direction as the partition wall of the exit porous plate It is embedded in the porous plate.

Figure 4c shows a method for manufacturing a heater-embedded filter of the present invention comprising a porous plate formed by zigzag-heating the heating wire constituting the electric heater, the array of such heating wires in a direction orthogonal to the partition wall of the exit porous plate It is embedded in the porous plate.

The soot filtration device according to the present invention integrates a filter and an electric heater or a filter and a hot wire coil to reduce the volume occupied by the filter and its peripheral devices, thereby increasing space efficiency and simplifying parts, thereby drastically reducing the cause of trouble. have.

In addition, by independently connecting the power of the electric heater or hot wire coil to reduce the burden of the electric energy required for regeneration, by embedding the heater or hot wire in the filter can directly heat the filter can increase the utilization efficiency of the electric energy.

Although the present invention has been described above, it will be readily understood by those skilled in the art that many other modifications and variations are possible without departing from the spirit and scope of the claims set out below. .

1A is a perspective view illustrating a porous plate with a heater according to a first embodiment of the present invention.

1B illustrates a method of alternately stacking a heater-embedded porous plate and a porous plate having partition walls according to a first embodiment of the present invention to form a filter.

FIG. 1C is another view illustrating a method of forming a filter by alternately stacking a heater-embedded porous plate and a porous plate having partition walls according to a first embodiment of the present invention.

FIG. 2A is a perspective view illustrating a porous plate embedded in a hot wire coil according to a second exemplary embodiment of the present invention. FIG.

2B and 2C illustrate a method of forming a filter by alternately stacking a porous plate having a hot wire coil embedded therein and a porous plate having partition walls according to a second embodiment of the present invention.

2D and 2E are views illustrating a method of forming a filter by alternately stacking a porous plate having a hot wire coil embedded therein and a porous plate having a partition therein so that the direction of the movement path of the exhaust gas is the same according to the second embodiment of the present invention. to be.

3A is a view showing a filter with a cartridge heater according to a third embodiment of the present invention.

3B is a view showing another form of filter in the third embodiment of the present invention.

4A to 4C are diagrams illustrating a method of laminating and heating a hot wire coil in a porous plate according to a fourth embodiment of the present invention.

5A is a perspective view showing a porous plate having a conventional partition wall formed thereon.

5B is a view showing a conventional filter in which porous plates are laminated so that partition walls cross each other.

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

10. Porous plate 11, 41. Electric heater

12, 42. Porous Substrates 13, 23, 26. Bulkheads

14, 24, 44.Tops 15, 16, 25, 43. Diaphragms

21. Hot coils 31. Cartridge heaters

Claims (20)

As filter used for soot filtration device, A plurality of inlet-side porous plates having an electric heater attached to the first porous substrate to be integrally formed, and having a movement passage of exhaust gas; A plurality of outlet side porous plates on which a plurality of partition walls are integrally formed with the second porous substrate in a parallel direction on the second porous substrate, and a moving passage for exhaust gas is formed by the plurality of partition walls. Including; Built-in heater alternately stacking the inlet-side porous plate and the outlet-side porous plate so that the exhaust gas flows into the inlet-side porous plate and passes through the porous substrates up and down, and then is discharged through the outlet-side porous plate. Filter for soot filtration. In claim 1, And the electric heater is formed on the first porous substrate in the same pattern as the partition wall formed on the second porous substrate so that the electric heater itself acts as a partition wall. In claim 2, The electric heater is a filter for a built-in heater soot filter connected to each other formed of a metal plate. In claim 1, A partition wall is further formed in the inlet-side porous plate, and the electric heater is a filter for a heater-embedded soot filter device embedded in the formed partition wall. In claim 4, The electric heater is a filter for a heater built-in type soot filtration device is a coil type heating wire. In claim 1, A filter for a heater-embedded soot filtration device, wherein a diaphragm is formed on both ends of the passage of the exhaust gas formed by the partition wall of the outlet side porous plate, alternately alternately arranged at both ends, and the diaphragm is alternately alternated up and down. In any one of claims 1 to 6, A filter for heater-embedded soot filtration device in which a direction in which the electric heater of the inlet-side porous plate is installed and a direction in which the partition wall of the outlet-side porous plate are formed cross each other at right angles. In any one of claims 4 to 6, A filter for a heater-embedded soot filter, in which a direction in which the electric heater of the inlet-side porous plate is installed and a direction in which the partition wall of the outlet-side porous plate are formed are the same. The method according to any one of claims 1 to 3, A filter for a built-in heater filter according to claim 1, wherein a diaphragm is integrally formed on one surface of the first porous substrate to which the electric heater is attached to block one end of the exhaust gas in the movement passage of the exhaust gas. In any one of claims 4 to 6, A filter for a heater-embedded soot filter, in which a diaphragm is formed while alternately staggered at both ends in a longitudinal direction of the electric heater on one surface on the first porous substrate on which the electric heater is attached. As filter used for soot filtration device, A plurality of barrier ribs are formed integrally with the porous substrate in a parallel direction on the porous substrate, and includes a plurality of inlet-side porous plates and outlet-side porous plates formed with the passage of the exhaust gas by the plurality of partition walls, And a plurality of porous plates laminated and sintered, and then inserting an electric heater into the moving passage to integrate the filter for a built-in heater. In claim 11, A filter for a heater-embedded soot filtration device, wherein a diaphragm is formed at both ends of the moving passage of the exhaust gas formed by the partition wall of the porous plate, alternately intersecting at both ends, and the diaphragm alternates up and down alternately. In claim 11, An electric heater inserted into the moving passage is a filter for a heater-type smoke filter equipped with a heater is one end is electrically connected to each other. The method according to any one of claims 11 to 13, A filter for heater-embedded smoke filtration in which the inflow direction of the exhaust gas from the inlet porous plate and the discharge direction of the exhaust gas from the outlet side porous plate cross at right angles to each other. The method according to any one of claims 11 to 13, A filter for a built-in heater filter according to claim 1, wherein the inflow direction of the exhaust gas from the inlet porous plate and the discharge direction of the exhaust gas from the outlet porous plate are coincident with each other. As filter used for soot filtration device, A plurality of inlet-side porous plates integrally formed by embedding an electric heater on the first porous substrate; A plurality of outlet side porous plates on which a plurality of partition walls are integrally formed with the substrate in a parallel direction on a second porous substrate, and a movement passage of the exhaust gas is formed by the plurality of partition walls. Including; A heater in which the inlet-side porous plate and the outlet-side porous plate are alternately stacked such that the exhaust gas flows into the inlet-side porous plate and passes through the porous substrate up and down, and then is discharged through the outlet-side porous plate. Built-in soot filter. The method of claim 16, A filter for a heater-embedded smoke filter, in which a diaphragm is formed at both ends of the moving passage of the exhaust gas formed by the partition wall of the outlet side porous plate, alternately intersecting at both ends, and the portions blocking the both ends alternately up and down alternately. . The method of claim 16 or 17, The electric heater is a filter for a heater built-in type soot filtration device formed of a plurality of heating wire in a lattice form. The method of claim 16 or 17, And said electric heater comprises a plurality of hot wires zigzag in a direction parallel to said partition wall of said outlet-side porous plate. The method of claim 16 or 17, And said electric heater comprises a plurality of hot wires zigzag in a direction crossing at right angles to said partition of said outlet side porous plate.