JP2007324014A - Exhaust gas treating device of fuel cell and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide industrially advantageously an exhaust gas treating device having an appropriate dimensional device unit matched with the dilution performance of required exhaust hydrogen gas. <P>SOLUTION: A first divided body 18 having a gas inflow port 34 and an air inflow port 35, a second divided body 22 having an air passage 72 and a housing space 70 separated by a partition 50 in the inside, and a third divided body 20 having an exhaust port 42 and a gas incoming part 74 in the inside, are integrally joined to constitute the device unit 10, and the second divided body 22 of the device unit 10 is constituted so that at least a part of the air passage 72 and at least a part of the housing space 70 are formed with at least one optionally selected from two or more divided body forming parts 44 separated by the partition 50 in the inside. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an exhaust gas treatment apparatus for a fuel cell and a method for manufacturing the same, and in particular, hydrogen gas discharged from the anode electrode side is diluted with air discharged from the cathode electrode side and discharged into the atmosphere. The present invention relates to an exhaust gas treatment device for a fuel cell having a function to obtain, and an advantageous manufacturing method for such a device.

  In recent years, fuel cells that are environmentally friendly and have high power generation efficiency have attracted attention and attempts have been made to use them for various purposes. For example, a fuel cell vehicle that uses a fuel cell as a drive source is expected as a next-generation vehicle, and a movement toward practical use is in full swing.

  In a fuel cell system using such a fuel cell, various devices have been devised to realize more stable and efficient power generation. For example, pure hydrogen mounted on a fuel cell vehicle or the like Many fuel cell systems using fuel (hereinafter referred to as hydrogen) are provided with a circulation device for supplying again the gas containing unused hydrogen discharged from the anode electrode side to the anode electrode side. In addition, the utilization efficiency of fuel hydrogen is improved. However, if circulation of the exhaust gas from the anode electrode side by the circulation device is continued for a long time, impurities such as nitrogen and generated water generated during power generation increase in the exhaust gas. A decrease in efficiency is inevitably caused.

  Therefore, in such a fuel cell system, the purge operation is intermittently performed, and the exhaust gas from the anode electrode side where impurities are increased is periodically discharged into the atmosphere. Since the exhaust gas discharged from the anode electrode side contains high-concentration hydrogen gas, when such exhaust gas is discharged into the atmosphere, the hydrogen gas contained in the exhaust gas is a safety problem. It was necessary to dilute to such an extent.

  Under such circumstances, the hydrogen gas discharged from the anode electrode side by the purge operation is diluted with the air discharged from the cathode electrode side, and discharged into the atmosphere (exhaust fuel). A diluter) has been proposed (see, for example, Patent Document 1 below).

  In this processing apparatus, a hydrogen gas discharge pipe discharged from the anode electrode side is connected to a gas introduction port, and hydrogen gas is introduced into the inside through the gas introduction port (in Patent Document 1 below, a retention chamber). It is called and is comprised. Further, in this apparatus main body, an exhaust pipe (referred to as a cathode pipe in the following Patent Document 1) for exhausting air from the cathode electrode side is plunged through an air inlet and further traverses the inside of the apparatus main body. It is penetrated and arranged. That is, in such a processing apparatus, the hydrogen gas discharged from the anode electrode side is introduced to distribute the storage space to be stored and the air discharged from the cathode electrode side, and the exhaust gas formed by the tip opening portion of the air discharge pipe. An air flow path that discharges to the atmosphere through the outlet is defined inside and outside the apparatus body with the tube wall of the air discharge pipe therebetween. In addition, a gas intrusion portion including a through hole penetrating the tube wall is formed at a portion of the air discharge pipe constituting the air flow path into the apparatus main body.

  Thus, in such a conventional exhaust gas treatment device, the hydrogen gas accommodated in the accommodation space enters (sucks) the air flow path through the gas intrusion portion, and the air flowing in the air flow path By being mixed in, it is diluted with such air, and this diluted hydrogen gas is configured to be discharged into the atmosphere from the outlet of the air flow path together with the air. It is.

  By the way, when the exhaust gas treatment device having such a structure is incorporated into a fuel cell system of a fuel cell vehicle, for example, the same exhaust gas treatment device can be incorporated regardless of the type of the fuel cell vehicle. This is advantageous in terms of productivity of the fuel cell system, and hence the fuel cell vehicle. As the common exhaust gas processing apparatus, an apparatus in which the volume of the accommodation space in the apparatus main body is made as large as possible is preferably used. This is because when the storage space has a large volume, the hydrogen gas introduced into the storage space is mixed with a large amount of residual air existing in the storage space and diluted with the residual air. This is because the gas is introduced into the air flow path from the gas intrusion portion, and is further diluted with the air in the air flow path, thereby ensuring higher dilution performance.

  However, when the same exhaust gas treatment device having a large volume of storage space is assembled to each of the fuel cell systems in various types of fuel cell vehicles, the fuel cell system is, for example, a fuel cell. Because the electrical capacity of the battery is relatively small, if the hydrogen gas dilution performance is not so high, the storage space becomes larger than necessary, and the hydrogen gas dilution performance becomes excessive. In addition, the weight of the exhaust gas treatment apparatus as a whole, an increase in installation space, and an extra cost burden are caused.

  Moreover, as is well known, in a fuel cell system mounted on a fuel cell vehicle or the like, when power generation is stopped, air other than the exhausted air from the cathode electrode side enters the air flow path. The remaining hydrogen gas is discharged without being discharged into the accommodation space by being forcibly sent. For this reason, when the volume of the storage space is larger than necessary, there is a problem that energy for sending the residual hydrogen gas discharge air is wasted.

  However, if a large number of exhaust gas treatment devices having different storage space volumes are prepared and used in accordance with the type of fuel cell in the fuel cell system, this is caused by the use of the same exhaust gas treatment device as described above. Problems and problems can be solved. However, in that case, the manufacturability of the fuel cell system, and thus the apparatus or equipment, such as a fuel cell vehicle, on which the fuel cell system is provided is significantly lowered, and the production cost is also increased.

JP 2004-127666 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is that the accommodating space for accommodating the discharged hydrogen gas from the anode electrode side is appropriately sized. Thus, a new structure that can efficiently and stably ensure the required dilution performance of the exhaust hydrogen gas without causing unnecessary enlargement of the entire apparatus, such as a fuel cell system and an apparatus provided with the same An object of the present invention is to provide an exhaust gas treatment device for a fuel cell that is effectively realized without deteriorating the manufacturability and production cost in production, and a method for advantageously producing such a device.

  In order to solve such a problem, the gist of the present invention is that the hydrogen gas discharged from the anode electrode side is introduced into the interior through the gas introduction port, and accommodated from the cathode electrode side. Air discharged from the air introduction port is introduced into the inside and circulated, and an air flow path that is discharged into the atmosphere through the discharge port is defined inside the apparatus body with a partition member interposed therebetween. A gas intrusion portion for allowing the hydrogen gas accommodated in the accommodation space to enter the air flow path is provided in the apparatus main body, and the hydrogen gas in the accommodation space is passed through the gas intrusion portion in the air flow path. In the exhaust gas treatment apparatus of a fuel cell configured to dilute the hydrogen gas with the air by being mixed into the air flowing through the air, and discharge the hydrogen gas together with the air to the atmosphere from the exhaust port. Mouth and the sky A first divided body having an introduction port; a second divided body in which the air flow path and the accommodation space are defined inside the partition member; the discharge port; and the gas The apparatus main body is configured with a divided structure in which an intrusion portion is provided and integrally joined to a third divided body, and the second divided body of the apparatus main body is configured to have the air flow. At least a part of the path and at least a part of the accommodation space are formed by using at least one arbitrarily selected from a plurality of divided body forming parts defined inside with the partition member therebetween. An exhaust gas treatment apparatus for a fuel cell.

  In the exhaust gas treatment apparatus for a fuel cell according to the present invention, the total length of the second divided body is changed by changing the number and type of divided body forming parts used to form the second divided body. And the volume of the accommodation space defined in the second divided body can be arbitrarily changed. Accordingly, it is possible to easily set the size of the accommodation space at an appropriate size required to stably secure the required hydrogen gas dilution performance.

  That is, in the apparatus of the present invention, the number of the divided body forming parts used to form the second divided body is simply changed to an arbitrary number, or the divided body forming parts have different lengths. Can easily tune the dilution performance of hydrogen gas so that the required performance is satisfied, so that, for example, a relatively high dilution performance is required due to the relatively small electric capacity. From a device for diluting exhaust gas of a fuel cell that is not used to a device for diluting exhaust gas of a fuel cell that requires a sufficiently high dilution performance in order to have a large electric capacity. It becomes applicable to. In other words, even if the required diluting performance of the exhaust hydrogen gas is changed, the processing apparatus can be obtained by changing the number and type of the divided body forming parts without changing the entire apparatus body. It is possible to respond promptly and appropriately while suppressing as much as possible the decline in overall manufacturability and the rise in production costs.

  Therefore, in the fuel cell exhaust gas treatment apparatus according to the present invention as described above, an unnecessary increase in size of the apparatus main body causes an increase in the weight and installation space of the exhaust gas treatment apparatus as a whole, and an extra cost burden. In addition, the required diluting performance of the exhaust hydrogen gas can be achieved without any deterioration in manufacturability and production cost of the fuel cell system in which the fuel cell is incorporated or various devices in which such a system is installed. It can be exerted extremely efficiently and stably.

Aspects of the Invention

  By the way, the present invention can be suitably implemented at least in various aspects as listed below.

<1> Hydrogen gas discharged from the anode electrode side is introduced into the inside through the gas introduction port, and the accommodation space to be accommodated and air discharged from the cathode electrode side are introduced into the inside through the air introduction port, An air flow path that circulates and discharges to the atmosphere through a discharge port is defined with a partition member inside the apparatus main body, and further, hydrogen gas stored in the storage space is separated from the air flow path. A gas intrusion portion for intruding into the apparatus is provided in the apparatus main body, and the hydrogen gas in the accommodation space is mixed into the air flowing through the air flow path through the gas intrusion portion, thereby allowing the hydrogen gas to flow into the air. In the exhaust gas treatment apparatus for a fuel cell configured to be diluted with the air and discharged into the atmosphere together with the air, a first divided body having the gas inlet and the air inlet; The air flow path and the accommodation; A second divided body having a space defined inside with the partition member therebetween, and a third divided body having the discharge port and the gas intrusion portion provided therein are integrally formed. The apparatus main body is configured with the divided structure formed by joining, while the second divided body of the apparatus main body is configured such that at least a part of the air flow path and at least a part of the accommodating space form the partition member. An exhaust gas treatment apparatus for a fuel cell, wherein the exhaust gas treatment apparatus is formed using at least one arbitrarily selected from a plurality of divided body forming parts defined inside.

<2> In the above aspect <1>, the partition member is removed at least at a part of the air channel corresponding to the downstream portion in the air flow direction, whereby the air channel and the A communication portion communicating with the storage space and allowing the hydrogen gas stored in the storage space to enter the air flow path is formed in the apparatus body, and the gas intrusion portion is Consists of communication section. According to this aspect, the gas intrusion portion can be easily formed in the apparatus main body with a relatively simple structure.

<3> In the aspect <1> or aspect <2> described above, the cross-sectional area of the flow of the hydrogen gas that is caused to flow from the gas inlet side toward the gas intrusion portion side in the housing space of the apparatus main body. However, the size is larger than the opening area of the gas inlet, and the hydrogen gas is allowed to flow while diffusing in the accommodation space. According to this embodiment, the hydrogen gas discharged from the anode electrode side is allowed to flow while diffusing in the accommodation space, whereby the pressure energy of the hydrogen gas is reduced, and thereby the hydrogen gas is reduced. A gas exhaust sound (for example, a purge sound generated when a purge operation is performed) can be effectively silenced or reduced.

<4> In any one of the above-described modes <1> to <3>, the cross-sectional area of the air flow channel is larger than the opening area of the air introduction port. The air introduced into the air flow path through the air introduction port is allowed to flow toward the discharge port while diffusing in the air flow path. According to this aspect, the air discharged from the cathode electrode side is circulated while diffusing in the air flow path, so that the pressure energy of the air is reduced, and thereby, from the cathode electrode side. Exhaust sound of discharged air (for example, fluid sound generated when flowing in the air flow path at high speed, pulsating sound generated when air is intermittently supplied to the fuel cell using a compressor, etc.) It can be effectively silenced or reduced.

<5> In any one of the above aspects <1> to <4>, the partition member is located upstream of the gas intrusion portion in the air flow direction in the air flow path. A plurality of through-holes are formed in the upstream portion, and the sound absorbing material covers all of the plurality of through-holes with respect to the surface on the accommodation space side in the formation portion of the plurality of through-holes of the partition member. It is placed in contact so as to close it. According to this aspect, the exhaust sound of the air discharged from the cathode electrode side and flowing in the air flow passage is absorbed by the sound absorbing material, and this also makes the exhaust sound of the air effective. It can be silenced or reduced.

<6> In the aspect <5> described above, a holding portion that sandwiches the sound absorbing material with the partition member is provided inside the apparatus main body. According to this aspect, it is possible to advantageously prevent displacement and separation of the sound absorbing material from a predetermined installation position, thereby stably ensuring the silencing or reducing effect of the air exhaust sound.

<7> Hydrogen gas discharged from the anode electrode side is introduced into the inside from the gas introduction port, and the accommodation space to be accommodated and air discharged from the cathode electrode side are introduced into the interior from the air introduction port, An air flow path that circulates and discharges to the atmosphere through a discharge port is defined with a partition member inside the apparatus main body, and further, hydrogen gas stored in the storage space is separated from the air flow path. A gas intrusion portion for intruding into the apparatus is provided in the apparatus main body, and the hydrogen gas in the accommodation space is mixed into the air flowing through the air flow path through the gas intrusion portion, thereby allowing the hydrogen gas to flow into the air. And a method for manufacturing an exhaust gas treatment device for a fuel cell configured to be discharged into the atmosphere from the exhaust port together with the air, wherein (a) the gas inlet port and the air inlet port are Prepare the first divided body with And (b) arbitrarily selecting at least one of a plurality of divided body forming parts in which at least a part of the air flow path and at least a part of the accommodating space are defined inside the partition member And using to prepare a second divided body comprising the at least one divided body forming part, which constitutes a part different from the first divided body part in the apparatus main body; c) A third divided body having the discharge port and having the gas intrusion portion provided therein, which constitutes a part further different from the part composed of the first and second divided bodies in the apparatus main body. And (d) assembling and integrally joining the first divided body on the upstream side in the air flow direction of the air flow path in the second divided body, and (e) The air flow path in the second divided body And a step of assembling and integrally joining the third divided body on the downstream side in the air flow direction.

  In this embodiment, even if the required dilution performance of the exhaust hydrogen gas is changed, the number and type of the divided body forming parts are simply changed without recreating the entire apparatus body. Therefore, the capacity of the storage space can be changed arbitrarily, and the hydrogen gas dilution performance can be easily tuned, thereby suppressing the decrease in the productivity of the entire processing equipment and the increase in the manufacturing cost as much as possible. However, it is possible to reliably achieve the required performance for the dilution performance of the exhaust hydrogen gas.

  Therefore, according to the present embodiment as described above, the entire apparatus is unnecessarily enlarged, the fuel cell system in which the fuel cell is incorporated, or the various devices in which such a system is installed, the deterioration in production efficiency and production cost, etc. A fuel cell exhaust gas treatment device that can efficiently and stably exhibit the required exhaust hydrogen gas dilution performance without incurring an industrial advantage with the lowest possible manufacturing cost and excellent manufacturability It can be manufactured.

  Hereinafter, in order to clarify the present invention more specifically, an embodiment of the present invention will be described in detail with reference to the drawings.

  1 and 2, an embodiment of a fuel cell exhaust gas diluting device having a structure according to the present invention is installed in a fuel cell vehicle, more specifically, incorporated in a fuel cell system of a fuel cell vehicle. The vertical cross-sectional form and the horizontal cross-sectional form in the state are shown schematically. In these drawings, reference numeral 10 denotes an apparatus main body made of a synthetic resin, and as a whole, has a substantially rectangular tube shape with both bottoms.

  That is, the apparatus main body 10 has a cylindrical tube wall portion 12 having a rectangular tube shape that extends in the front-rear direction of the vehicle (the left-right direction in FIG. 1 and the direction perpendicular to the paper surface in FIG. 2) when mounted on the fuel cell vehicle. The front bottom portion 14 and the rear bottom portion 16 that respectively close the front opening (the left opening in FIG. 1) and the rear opening (the right opening in FIG. 1) of the cylindrical wall portion 12 are integrated. And is configured. Hereinafter, in order to facilitate understanding of the structure of the exhaust gas dilution device according to the present embodiment, for convenience, the front bottom portion 14 side will be referred to as the front side, and the rear bottom portion 16 side will be referred to as the rear side. I will say.

  And in the exhaust gas dilution apparatus of the present embodiment, in particular, the apparatus main body 10 has a front divided body 18 as a first divided body having a front bottom 14 and a rear bottom 16. Assembling three types of divided bodies, that is, the rear divided body 20 as the third divided body and the intermediate divided body 22 as the second divided body having most of the cylindrical wall portion 12 in the front-rear direction, It is configured with a divided structure or an assembly structure that are integrally joined.

  More specifically, as is clear from FIGS. 3 and 4, the front bottom portion 14 of the front divided body 18 has a substantially rectangular flat plate shape. Further, the front side bottom portion 14 is integrally provided with a front side peripheral wall portion 24 that protrudes rearward from the outer peripheral edge portion with a short length and continuously extends in the circumferential direction. That is, the front side divided body 18 has a square shape with a low height and a one-sided bottom. As a result, the inner space 28 of the front divided body 18 is opened rearward through the rear opening of the front peripheral wall 24. In addition, the end surface shape of the front peripheral wall portion 24 of the front divided body 18 is a rectangular shape having the same size as the front bottom portion 14, and further, on the outer peripheral surface of the front end portion (rear end portion) of the front peripheral wall portion 24. The rectangular flange-shaped outer flange portion 26 is integrally provided.

  In addition, at the center portion in the left-right direction (left-right direction in FIG. 4) of the front bottom portion 14 of such a front-side divided body 18, an anode pipe connecting cylinder part 30 and a cathode pipe connecting cylinder part 32 are arranged with the former on the upper side. These are integrally formed in a state where they are positioned at a predetermined distance in the vertical direction.

  The anode pipe connecting tube portion 30 provided on the front bottom portion 14 has a small-diameter cylindrical shape, and protrudes forward from the front surface of the front bottom portion 14. On the other hand, the cathode pipe connection cylinder part 32 has a cylindrical shape larger in diameter than the anode pipe connection cylinder part 30. A part of the front bottom portion 14 is projected forward from the front surface of the front bottom portion 14 with a predetermined length, while the remaining portion has an axial length longer than the axial length of the front peripheral wall portion 24 by a predetermined dimension. The rear bottom 14 protrudes rearward from the rear surface. As a result, the inner space 28 of the front divided body 18 is also opened forward through the front opening of the anode pipe connecting cylinder 30. Here, the front side opening of the anode pipe connection cylinder part 30 is a gas introduction port 34, and the front side opening of the cathode pipe connection cylinder part 32 is an air introduction port 35. Yes.

  As shown in FIGS. 5 and 6, the rear bottom portion 16 included in the rear divided body 20 also has a substantially rectangular flat plate shape similar to the front bottom portion 14 provided in the front divided body 18. The rear bottom portion 16 is integrally provided with a rectangular tubular rear side peripheral wall portion 36 that protrudes forward from the outer peripheral edge portion and continuously extends in the circumferential direction. That is, the rear divided body 20 also has a single-sided square tube shape with a low overall height. As a result, the inner space 39 of the rear divided body 20 is opened forward through the front opening of the rear peripheral wall 36. The end surface shape of the rear peripheral wall portion 36 of the rear divided body 20 is the same rectangular shape as the entire shape of the rear bottom portion 16 and further the end surface shape of the front peripheral wall portion 24 in the front divided body 18. .

  Furthermore, the outer peripheral surface of the front end portion (front end portion) of the rear side peripheral wall portion 36 has a rectangular frame shape having the same size as the outer flange portion 26 provided on the front side peripheral wall portion 24 of the front divided body 18. An outer flange portion 38 is provided integrally around the outer flange portion 38. Here, the height (axial length) of the rear peripheral wall portion 36 is made a predetermined dimension larger than the height (axial length) of the front peripheral wall portion 24 provided in the front divided body 18, Thus, the volume of the inner space 39 of the rear divided body 20 is larger than the inner space 28 of the front divided body 18.

  Further, in such a rear divided body 20, a discharge pipe connecting cylinder portion 40 is integrally formed at a lower portion of the center portion of the rear bottom portion 16 in the left-right direction (left-right direction in FIG. 6). The discharge pipe connecting cylinder part 40 has a cylindrical shape having substantially the same diameter as the cathode pipe connecting cylinder part 32 formed integrally with the front bottom part 14 and protrudes rearward from the rear surface of the rear bottom part 16. Yes. As a result, the inner space 39 of the rear divided body 20 is also opened rearward through the rear opening of the discharge pipe connecting cylinder 40. In this case, the rear opening of the discharge pipe connecting cylinder 40 is a discharge opening 42 having substantially the same diameter as the air inlet 35 formed by the front opening of the cathode pipe connecting cylinder 32. ing.

  On the other hand, as shown in FIG. 1, the intermediate divided body 22 is configured by assembling two divided body forming parts 44 and 44. These two divided body forming parts 44, 44 both have the same size and structure. That is, as apparent from FIGS. 7 and 8, the divided body forming part 44 includes an outer cylindrical portion 46 that gives the outer shape thereof, a first inner half cylindrical portion 48 provided on the inner side thereof, A second inner half cylinder portion 50 provided on the inner side of the one inner half cylinder portion 48 is integrally provided.

  The outer cylindrical portion 46 has a rectangular rectangular tube shape as a whole, and the end surface shapes on both sides in the axial direction are the end surface shapes of the front and rear peripheral wall portions 24 and 36 in the front and rear divided bodies 18 and 20, respectively. And a rectangular shape of the same size. Further, the axial length of the outer cylindrical portion 46 is shorter than the half of the axial length of the apparatus main body 10 by a predetermined dimension (see FIG. 1). And the outer peripheral surface of the axial direction both ends is a rectangular frame shape having the same size as the outer flange portions 26 and 38 respectively provided on the outer peripheral surfaces of the front and rear divided bodies 18 and 20. The flange portion 52 is integrally provided around.

  The first inner half cylinder portion 48 has a half cylinder having substantially the same diameter as the width dimension of the outer cylinder portion 46 (dimension in the left-right direction in FIG. 8) and the same axial length as the axial length thereof. It has a shape. And in the state arrange | positioned in the outer side cylinder part 46 so that it may extend in parallel with the axial direction, it is integrated with respect to the inner surface of the lower side wall part of the outer side cylinder part 46 in a half surface. Thereby, the inner space of the outer cylindrical portion 46 is divided into two vertically by the first inner half cylindrical portion 48, and the first inner half cylindrical portion 48 is formed inside the outer cylindrical portion 46. An upper space 54 positioned on the upper side (outer peripheral surface side) and a lower space 56 positioned on the lower side (inner peripheral surface side) are defined. Here, the area of the cross section in the direction perpendicular to the axis of the upper space 54 is made sufficiently larger than the opening area of the gas inlet 34 of the anode pipe connecting cylinder 30.

  On the other hand, the second inner half cylinder portion 50 has a diameter smaller than the width dimension of the outer cylinder portion 46 and the diameter of the first inner half cylinder portion 48 and the same axial direction as the axial length thereof. A half cylinder shape having a length smaller than that of the first inner half cylinder portion 48 is provided. Further, in the second inner half cylinder portion 50, a semi-disc-shaped bottom portion 58 that closes the opening portion on the one axial side is integrally formed only at the end portion on the one axial side. .

  The second inner half cylinder portion 50 is disposed in the lower space 56 formed inside the outer cylinder portion 46 so as to extend coaxially with the first inner half cylinder portion 48. In this state, the half surface is integrated with the inner surface of the lower side wall portion of the outer cylindrical portion 46. Thereby, the lower space 56 is further divided into two parts by the second inner half cylinder part 50, and the inner peripheral surface of the second inner half cylinder part 50 and the lower side wall part of the outer cylinder part 46. Is surrounded by the inner surface 60 of the lower space extending in the axial direction, the outer peripheral surface of the second inner half cylinder portion 50, and the inner peripheral surface of the first inner half cylinder portion 48. A lower space outer space 62 that extends in the axial direction and is configured to surround the lower space inner space 60 from the outside is defined in the lower space 56. Here, the area of the cross section in the direction perpendicular to the axis of the lower space inner space 60 is sufficiently larger than the opening area of the air introduction port 35 of the cathode pipe connection cylinder portion 32.

  Further, in the second inner half cylinder portion 50, a circular through-hole 64 penetrating therethrough is provided at the center portion of the bottom portion 58 provided at one end portion in the axial direction. Furthermore, a large number of through holes 66 are formed in the cylinder wall of the second inner half cylinder part 50. Each of these through-holes 66 has a relatively small rectangular shape, penetrates through the cylindrical wall of the second inner half cylinder portion 50, and connects the lower space inner space 60 and the lower space outer space 62 to each other. And are arranged in a line at equal intervals in the axial direction at each of the circumferentially spaced portions of the second inner half cylinder portion 50 in the circumferential direction. It has been.

  In the present embodiment, as shown in FIG. 1, two of the divided body forming parts 44 having such a structure are arranged in series in the front-rear direction, and the bottom portion in the second inner half cylinder portion 50. The end surfaces opposite to the 58 side are abutted so that the outer flange portions 52 come into contact with each other and assembled, and the end surfaces and the outer flange portions 52 are integrated by, for example, welding or adhesion. Thus, the intermediate divided body 22 is formed.

  Further, in the intermediate divided body 22 thus formed, the end surfaces of the first inner half tubular portion 48 in each divided body forming part 44 and the bottom 58 side of the second inner half tubular portion 50 are provided. The end faces opposite to each other are integrally joined by welding, adhesion, or the like. Thereby, the upper spaces 54, the lower space inner spaces 60, and the lower space outer spaces 62 in each divided body forming part 44 are communicated with each other, and these spaces or spaces 54, 60, 62 are communicated. Is formed in the intermediate divided body 22 so as to extend in the axial direction over the entire length. Thus, the upper spaces 54 and 54 and the lower space outer spaces 62 and 62 in the intermediate divided body 22 are opened forward and rearward through the front and rear openings, respectively. Further, the lower space inner spaces 60 and 60 are opened to the front and the rear through the through holes 64 provided in the bottoms 58, respectively.

  Further, a sound absorbing material 68 is accommodated in the lower space outer spaces 62 and 62 in the intermediate divided body 22. The sound absorbing material 68 is made of, for example, a material having air permeability such as a fiber aggregate such as stainless wool or glass wool or a continuous porous body provided with a large number of communicating bubbles therein, and the overall shape thereof is intermediate. Compared to the shape of the lower space outer spaces 62 and 62 formed in the divided body 22, the axial length is the same, but the halved cylindrical shape is slightly increased in thickness. And in such lower space outer space 62, 62, it surrounds each outer peripheral surface of each 2nd inner half cylinder part 50, 50, and many many provided in those 2nd inner half cylinder parts 50 are provided. It arrange | positions so that all the through-holes 66 may be obstruct | occluded, and in such arrangement | positioning state, each outer peripheral surface of the 2nd inner half cylinder part 50 and 50, and the 1st inner half cylinder part 48, 48 is held between each inner peripheral surface. As is clear from this, here, the holding portion is constituted by the first inner half cylinder portion 48.

  Thus, in the exhaust gas processing apparatus of the present embodiment, the front divided body 18 is part of the anode pipe connecting cylinder part 30 and the cathode pipe connecting cylinder part 32 on the front side of the intermediate divided body 22. And the front end surface of the outer cylindrical portion 46 and the outer flange portion 52 in the intermediate divided body 22 with respect to the front end surface and the outer flange portion 26 of the front peripheral wall portion 24. Are joined together by welding, bonding or the like. Moreover, the protrusion part to the back side of the cathode piping connection cylinder part 32 in the front side division body 18 in this joining state is the 2nd inner side half cylinder located in the front side in the intermediate division body 22 in the front-end | tip part. The hole 50 is inserted into a through hole 64 provided in the bottom 58 of the portion 50, and is integrally joined to the inner peripheral surface of the through hole 64.

  Further, at the rear side of the intermediate divided body 22, the rear divided body 20 has the discharge pipe connecting cylinder portion 40 at the bottom 58 of the second inner half cylinder portion 50 located on the rear side in the intermediate divided body 22. It is positioned coaxially with the through-hole 64 provided in the rear side and in a state of protruding rearward. And in the state which faced in the front side end face of outer side peripheral wall part 36 and outer flange part 38 with respect to the end face of outer cylinder part 46 and outer flange part 52 in middle division 22, it is by welding, adhesion, etc. They are joined together.

  As described above, in the exhaust gas treatment apparatus of the present embodiment, the front divided body 18 is formed by an integral joined body of the front divided body 18, the intermediate divided body 22, and the rear divided body 20. A rectangular rectangular tube-shaped cylindrical wall portion 12 comprising a front peripheral wall portion 24, outer cylindrical portions 46, 46 of the intermediate divided body 22, and a rear peripheral wall portion 36 of the rear divided body 20, and the front and rear divided bodies 18, The apparatus main body 10 is integrally provided with front and rear bottom portions 14 and 16 that each 20 has.

  In the apparatus main body 10, an accommodation space 70 is formed by the inner space 28 of the front divided body 18, the upper spaces 54 and 54 of the intermediate divided body 22, and the inner space 39 of the rear divided body 20. Has been. Further, the lower space inner space 60, 60 surrounded by the two second inner half cylinder portions 50, 50 in the intermediate divided body 22 and the inner space 39 of the rear divided body 20 in the rear divided body 20 are provided. An air flow path 72 extending in the front-rear direction over the entire length is formed in the apparatus main body 10 at the lower portion. That is, most of each of the accommodation space 70 and the air flow path 72 is defined in the apparatus main body 10 with the second inner half cylinder portions 50 and 50 being separated from each other. In addition, a part of each of the accommodation space 70 and the air flow path 72 is defined inside the divided body forming part 44 constituting the intermediate divided body 22 with the second inner half cylinder portion 50 therebetween. As apparent from this, in the present embodiment, the second inner half cylinder portion 50 constitutes a partition member.

  Further, the accommodation space 70 formed in the apparatus main body 10 is communicated with the respective inner holes of the anode pipe connecting cylinder portion 30 of the front divided body 18 and the discharge pipe connecting cylinder portion 40 of the rear divided body 20. ing. The air flow path 72 passes through the inner hole of the cathode pipe connection cylinder part 32 of the front divided body 18 through the through hole 64 provided in the front side of the two second inner half cylinder parts 50, 50. On the other hand, the lower portion of the inner space 39 in the rear divided body 20 is communicated with the inner hole of the discharge pipe connecting cylinder portion 40 of the rear divided body 20.

  Here, the lower portion of the inner space 39 of the rear divided body 20 that constitutes a part of the air flow path 72 is accommodated without being surrounded by the second inner half cylinder portions 50 and 50. The communication portion is connected to the space 70. In other words, the second inner half cylinder portions 50, 50 are removed on the discharge passage 42 side in the air flow path 72, and the communication portion communicated with the accommodation space 70 is the inner side of the rear divided body 20. A lower portion of the space 39 is formed. Thus, the gas intrusion in which the lower part of the inner space 39 of the rear divided body 20 constituting the communicating part allows the hydrogen gas introduced into the accommodation space 70 to enter the air flow path 72 as described later. The unit 74 is configured.

  Further, in the present embodiment, an anode pipe 76 through which hydrogen gas discharged from the anode electrode is circulated is connected to the anode pipe connecting cylinder portion 30 through which the accommodation space 70 is communicated. Furthermore, a cathode pipe 78 through which air discharged from the cathode electrode is circulated is connected to the cathode pipe connecting cylinder portion 32 through which the air flow path 72 is communicated. Furthermore, a discharge pipe 80 that opens to the atmosphere at the distal end is connected to the discharge pipe connecting cylinder portion 40 in which the accommodation space 70 and the air flow path 72 are communicated together.

  Thus, in the exhaust gas treatment apparatus of the present embodiment having such a structure, the air discharged from the cathode electrode side and flowing through the cathode pipe 78 is always the air in the cathode pipe connecting cylinder portion 32. It is introduced into the air flow path 72 from the introduction port 35 through the front through hole 64 and is allowed to flow through the air flow path 72, and is connected to the exhaust pipe through the gas intrusion portion 74 from the rear through hole 64. It is made to flow toward the inside of the cylindrical portion 40. That is, the air discharged from the cathode electrode side can be circulated in the air flow path 72 provided inside the apparatus main body 10 from the front side to the rear side of the apparatus main body 10. Then, the air circulated in the air flow path 72 is caused to flow into the discharge pipe 80 through the discharge port 42 of the discharge pipe connecting cylinder portion 40, and discharged into the atmosphere from the tip opening of the discharge pipe 80. It has come to be.

  Further, in the exhaust gas processing apparatus, as described above, a large number of through holes 66 are formed in each of the second inner half cylinder portions 50 and 50 forming the air flow path 72, and the sound absorbing material. 68 is attached so as to close the large number of through holes 66. As a result, when air is allowed to flow through the air flow path 72, exhaust sound such as fluid sound and pulsation sound of the air is transmitted to the sound absorbing material 38 through the numerous through holes 66, where the sound is silenced or reduced. It is supposed to be.

  Further, the cross-sectional area of the lower space inner space 60, 60 in the direction perpendicular to the axis, in other words, the cross-sectional area of the air flow path 72 is sufficiently larger than the opening area of the air introduction port 35. The air introduced into the air flow path 72 through the air introduction port 35 is caused to flow while diffusing in the air flow path 72, so that the pressure energy of the air is lowered. As a result, the exhaust sound of the air flowing through the cathode pipe 78 and the exhaust pipe 80 can be silenced or reduced.

  On the other hand, the hydrogen gas discharged from the anode electrode side by the purge operation and flowing through the anode pipe 76 is intermittently introduced into the accommodation space 70 of the apparatus main body 10 from the gas inlet 34 of the anode pipe connecting cylinder portion 30. In addition to being accommodated and being purged, the interior of the accommodation space 70 is directed to the side opposite to the gas introduction port 34 side, that is, toward the gas intrusion part 74 and the discharge pipe connecting cylinder part 40 side. It will be allowed to flow to the rear side. At this time, as described above, the cross-sectional area of the upper spaces 54, 54 in the direction perpendicular to the axis, that is, the cross-sectional area of the hydrogen gas flow in the accommodation space 70 is sufficiently larger than the opening area of the gas inlet 34. The hydrogen gas introduced into the accommodation space 70 through the gas inlet 34 is caused to flow while diffusing in the accommodation space 70. As a result, the pressure energy of the hydrogen gas is reduced, and the exhaust sound such as the purge sound of the hydrogen gas flowing in the accommodation space 70 is silenced or reduced.

  And in this embodiment apparatus, the air which flows in the air flow path 72 passes through the gas intrusion part 74 connected by the inside of the accommodation space 70 in which hydrogen gas is accommodated from the air introduction port 35 side, and is an exhaust port. It is designed to be distributed toward the 42 side. For this reason, the hydrogen gas that has flowed through the accommodation space 70 and has reached the gas intrusion portion 74 is caused to enter the air passage 72 so as to be sucked into the air passage 72 by the air flow in the air passage 72. Therefore, it is mixed in the air in the air flow path 72, diluted, and discharged together with the air to the atmosphere through the opening at the tip of the discharge pipe 80.

  By the way, when manufacturing the exhaust gas processing apparatus of the present embodiment having such a structure, for example, the operation is advanced according to the following procedure.

  That is, first, a front divided body 18 having a structure as shown in FIGS. 3 and 4 and a rear divided body 20 having a structure as shown in FIGS. 5 and 6 are combined with a synthetic resin material such as polyamide or polypropylene. By carrying out injection molding using etc., each is molded separately and prepared.

  On the other hand, the divided body forming part 44 constituting the intermediate divided body 22 is prepared by molding, for example, by injection molding using a synthetic resin material such as polyamide or polypropylene. 7 and FIG. 8 have different structures in the axial direction, and the second inner half cylinder portion 50 is provided with a bottom portion 58 having a through hole 64. Several types are prepared, such as none.

  Further, apart from the front and rear divided bodies 18 and 20 and a plurality of types of divided body forming parts 44, a sound absorbing material 68 having a half-cylindrical cylindrical shape is produced by a known method or a commercially available one is used. And prepare.

  Next, in order to form the intermediate divided body 22, an arbitrary one is selected from the plural types of divided body forming parts 44 prepared in advance. One or a plurality having a suitable axial length is selected so that the volume of the accommodation space 70 necessary to obtain the hydrogen gas dilution performance required in the apparatus is secured. Here, two divided body forming parts 44 having a structure as shown in FIGS. 7 and 8 are selected and used.

  When forming the exhaust gas treatment apparatus of the present embodiment having the structure shown in FIGS. 1 and 2, when three or more divided body forming parts 44 are selected from a plurality of types prepared in advance. In this case, it is necessary to select one or two ones in which the second inner half cylinder portion 50 is provided with the bottom 58 having the through hole 64. This is because the cathode pipe connecting tube portion 32 of the front divided body 18 must be inserted and fixed in the through hole 64 of the bottom portion 58.

  Next, as shown in FIG. 9, the selected two divided body forming parts 44 are arranged on the side opposite to the bottom 58 side in the respective second inner half-cylinder portions 50. The end surfaces of 46 and the outer flange portions 52 face each other and are arranged. At this time, the end faces of the first inner half cylinder portion 48 and the end faces of the second inner half cylinder portion 50 in each divided body forming part 44 are also brought into contact with each other. An adhesive or the like is applied to the end face of the film. Thereby, when the two divided body forming parts 44 and 44 are brought into contact with each other, the respective end surfaces of the first and second inner half cylinder portions 48 and 50 are fluid-tightly bonded to each other. Then, for example, ultrasonic welding is performed on the abutting portions between the end surfaces of the outer cylindrical portions 46 and the outer flange portions 52 in the two divided body forming parts 44, 44. Accordingly, the two divided body forming parts 44 and 44 are integrally joined in a fluid-tight state to form the intermediate divided body 22.

  Thereafter, as shown in FIG. 9 and FIG. 10, on the end surface on one side in the axial direction of the outer cylindrical portions 46, 46 in the intermediate divided body 22 formed as described above, and on the end on the one side in the axial direction. The front end surface of the front peripheral wall 24 in the front divided body 18 and the outer flange 26 provided at the front end of the front peripheral wall 24 are abutted against the provided outer flange 52. Thus, the intermediate divided body 22, the front divided body 18, and the opening on the one side in the axial direction of the outer cylindrical portions 46, 46 of the intermediate divided body 22 are covered with the front bottom 14 of the front divided body 18. Assemble.

  At this time, the protruding portion of the cathode pipe connecting tube portion 32 from the front peripheral wall portion 24 forming surface in the front bottom portion 14 of the front divided body 18 is the second inner half tube portion 50 in the intermediate divided body 22 at the tip portion. , 50 are inserted into and positioned in the through holes 64 of the bottom 58 located on the abutting side with the front divided body 18. An adhesive is applied to the outer peripheral surface of the distal end portion and the inner peripheral surface of the through hole 64 in the protruding portion of 32. As a result, under the assembled state of the intermediate divided body 22 and the front divided body 18, the insertion portion of the cathode pipe connecting cylinder portion 32 into the through hole 64 is fluid-tight with respect to the inner peripheral surface of the through hole 64. Glued. Then, for example, ultrasonic welding is performed on the abutting portion of the intermediate divided body 22 and the front divided body 18 so that the two divided bodies 22 and 18 are integrally joined.

  Subsequently, as shown in FIG. 10, the previously prepared sound absorbing material 68 is inserted and disposed in the lower space outer spaces 62 and 62 of the intermediate divided body 22 to which the front divided body 18 is integrally joined. In addition, as the sound absorbing material 68 used here, among the fiber aggregate and the communicating porous body exemplified above, the overall shape has the same axial length as the lower space outer spaces 62, 62, Those having a half-cylindrical overall shape slightly thicker than those and having elasticity are preferably used. Then, it is clamped between the 1st inner half cylinder part 48 and the 2nd inner half cylinder part 50 of the intermediate division body 22 only by inserting in the lower space outer space 62, 62 in a contracted state. As a result, the space is stably disposed in the outer spaces 62, 62 of the lower space.

  Next, with respect to the end surfaces of the outer cylindrical portions 46, 46 opposite to the front divided body 18 side in the intermediate divided body 22 integrally joined with the front divided body 18, and the outer flange portion 52 provided on the end surface side. Thus, the front end surface of the rear peripheral wall portion 36 in the rear divided body 20 and the outer flange portion 38 provided at the front end portion of the rear peripheral wall portion 36 are brought into contact with each other. Thereby, in the state where the opening on the opposite side to the joining side with the front side divided body 18 in the outer cylinder portions 46, 46 of the intermediate divided body 22 is covered with the rear bottom portion 16 of the rear side divided body 20, The rear divided body 20 is assembled to the joined body of the intermediate divided body 22 and the front divided body 18. Further, in such an assembled state, the discharge pipe connecting cylinder portion 40 provided in the rear bottom portion 16 of the rear divided body 20 is provided in the through hole provided in the second inner half cylinder portion 50 in the intermediate divided body 22. 64 is coaxially positioned.

  Then, under the assembled state of the rear divided body 20 with respect to the joined body of the front divided body 18 and the intermediate divided body 22, for example, ultrasonic welding is performed on the abutting portions, and the front divided body is obtained. The rear divided body 20 is integrally joined to the joined body of 18 and the intermediate divided body 22. Thus, the target exhaust gas treatment apparatus having the structure as shown in FIG. 1 is formed.

  As described above, the exhaust gas treatment apparatus of the present embodiment is constituted by an integrally joined body of the front divided body 18, the intermediate divided body 22, and the rear divided body 20, An intermediate divided body 22 having an upper space 54 that constitutes most of the accommodation space 70 is configured by integrally joining two divided body forming parts 44 and 44. Then, when forming the intermediate divided body 22, the volume of the accommodation space 70 required to satisfy the required performance for the diluting performance of hydrogen gas is secured from among a plurality of types of divided body forming parts 44 prepared in advance. Two segment forming parts 44 that can be used are selected and used.

  Therefore, in this embodiment, the number of the divided body forming parts 44 used for forming the intermediate divided body 22 is changed, or the divided body forming parts 44 are changed in length in the axial direction. By changing to another different type, the total length of the intermediate divided body 22 can be changed, and thereby the inside of the apparatus main body 10 which is mostly constituted by the upper space 54 in the intermediate divided body 22 is changed. The volume of the accommodation space 70 can be easily set at an arbitrary size.

  Thus, in the exhaust gas processing apparatus of this embodiment, at the time of manufacture, the number of the divided body forming parts 44 is simply changed to an arbitrary number, or the divided body forming parts 44 are changed to those having different lengths. The hydrogen gas dilution performance can be easily tuned so that the required performance is satisfied. As a result, for example, even if the required dilution performance of the hydrogen gas is changed by changing the discharge condition or flow condition of the discharged hydrogen gas, it is possible to divide without recreating the entire apparatus body 10. By changing the number and type of body forming parts 44, it is possible to respond quickly and appropriately to the required performance while suppressing as much as possible the decline in the productivity of the entire processing apparatus and the increase in production costs. is there. Further, it is possible to advantageously eliminate the necessity of making the housing space 70 larger than necessary in order to cope with various required performances and unnecessarily increase the size of the apparatus main body 10.

  Therefore, according to the exhaust gas processing apparatus of this embodiment as described above, the weight of the entire exhaust gas processing apparatus due to unnecessary enlargement of the apparatus main body 10, an increase in installation space for the fuel cell vehicle, and an extra cost burden. The required dilution performance of exhaust hydrogen gas is extremely efficient and without deteriorating the manufacturability and production cost of the fuel cell system of the fuel cell vehicle in which the fuel cell is incorporated. It can be demonstrated stably.

  Further, in the exhaust gas treatment apparatus of the present embodiment, the number of the divided body forming parts 44 is changed to an arbitrary number, or the divided body forming parts 44 are changed to ones having different lengths, so that the air flow path is changed. The volume of the lower space inner space 60 constituting most of 72, and the size of the sound absorbing material 68 positioned so as to cover the second inner half-cylinder portion 50 forming the lower space inner space 60 may also be used. However, it can be easily changed. Therefore, according to this embodiment as described above, the silencing function of the exhaust sound of the air that circulates in the air flow path 72 can be easily tuned by changing the number and types of the divided body forming parts 44. It can be done.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention is not limited by the above description.

  For example, as described above, the number of divided body forming parts 44 used to form the intermediate divided body 22 is not limited in any way, and is necessary for satisfying the performance required for the hydrogen gas dilution performance. The number of the storage spaces 70 that can be secured is used, and the specific number depends on the required volume of the storage space 70 and the volume (length, width, or (Diameter) and the like. Further, when a plurality of divided body forming parts 44 are used, there is no problem even if the volumes have different sizes due to differences in length, shape, etc. of each divided body forming part 44.

  Further, the structure of the gas intrusion portion 74 is not particularly limited to the illustrated one, and may be a structure as shown in FIG. 11, for example. In addition, about embodiment shown by this FIG. 11, about the member and site | part made into the structure similar to the said embodiment shown by FIG.1 and FIG.2, attaching | subjecting the same code | symbol as FIG.1 and FIG.2, The detailed explanation was omitted.

  That is, in the present embodiment, the end face shapes of the cathode pipe connecting cylinder portion 32 of the front divided body 18 and the discharge pipe connecting cylinder portion 40 of the rear divided body 20 are the second inner halves of the intermediate divided body 18. The shape is the same as the end face shape of the cylindrical portion 50. Further, the discharge pipe connecting cylinder portion 40 of the rear divided body 20 is provided with a protruding portion 82 protruding forward into the inner space 39, and a plurality of through holes 84 are formed in the protruding portion 82. Yes. The protruding portion 82 is integrally joined to the rear end surface of the second inner half cylinder portion 50 in the intermediate divided body 22 at the front end surface, while the cathode pipe connection of the front divided body 18 is performed. The rearward projecting portion of the tubular portion 32 is integrally joined to the front end surface of the second inner half tubular portion 50 of the intermediate divided body 22 at the distal end surface. Thereby, in the apparatus main body 10, the inner hole of the cathode pipe connection cylinder part 32, the lower space inner space 60, 60 surrounded by the second inner half cylinder parts 50, 50, and the discharge pipe connection cylinder part An air flow path 72 composed of 40 inner holes is formed. As is clear from this, here, the cathode pipe connecting cylinder part 32, the second inner half cylinder parts 50 and 50, and the discharge pipe connecting cylinder part 40 constitute a partition member.

  Thus, in the exhaust gas processing apparatus of the present embodiment, with respect to the projecting portion 82 of the exhaust pipe connecting tube portion 40 constituting the exhaust port 42 side portion in the air flow path 72, that is, the downstream portion in the air flow direction. The air flow path 72 and the accommodation space 70 are communicated with each other through a plurality of through holes 84 formed so as to be partially removed. That is, each of the plurality of through holes 84 forms a gas intrusion portion 74, and hydrogen gas in the accommodation space 70 enters the air flow path 70 from the gas intrusion portion 74 formed of each through hole 84. Thus, the air in the air flow path 70 is mixed. As a result, the hydrogen gas is diluted with the air in the air flow path 70 and is discharged into the atmosphere together with air from the tip opening of the discharge pipe 80 connected to the discharge pipe connecting cylinder 40. It has become.

  Moreover, in the said embodiment, while the front side division body 18 consists of the front side bottom part 14 and the front side surrounding wall part 24, the rear side division body 20 is comprised by the back side bottom part 16 and the rear side surrounding wall part 36, These front side and rear side divided bodies 18 and 20 are each formed into a rectangular tube shape with a bottom on one side having inner spaces 28 and 39, respectively, so that the accommodation space 72 is formed in each of the front side and rear side divided bodies 18 and 20. The inner spaces 28 and 39 and the upper spaces 54 and 54 of the intermediate divided body 22 were formed. However, for example, the front divided body 18 and the rear divided body 20 are formed in a flat plate shape including only the front bottom 14 and the rear bottom 16, and the accommodation space 72 is formed only by the upper space 54 of the intermediate divided body 22. Is also possible.

  Further, for example, a part of the cathode pipe 78 may be rushed into the apparatus main body 10, and the air flow path 72 may be configured by the part of the cathode pipe 78 that enters the apparatus main body 10. In this case, a gap is provided between the entry portion of the cathode pipe 78 and the discharge pipe connecting cylinder portion 40 so that the air passage 72 and the accommodating space 70 are communicated, or the air passage is formed on the tube wall of the entry portion. A through hole that communicates between the storage space 70 and the accommodating space 70 is provided, and the gas intrusion portion 74 is configured by the gap or the through hole.

  Furthermore, the overall shape and material of the apparatus main body 10 including the front side, the rear side, and the intermediate divided bodies 18, 20, and 22 are not limited to the illustrated ones. As long as 72 is defined, it may have any shape or material. Of course, the shape and material of each of the divided bodies 18, 20, and 22 can be changed as appropriate according to the overall shape and material of the apparatus main body 10.

  In addition, the method of integrally joining the front divided body 18 as the first divided body, the intermediate divided body 22 as the second divided body, and the rear divided body 20 as the third divided body is also particularly limited. It is not something. Therefore, for example, a method of fixing bolts between the corresponding outer flange portions 26, 52, and 38 can be adopted, or if each divided body 18, 22, and 20 is made of metal, a welding method or the like is also adopted. Can be done. Note that the outer flange portions 26, 52, and 38 can be omitted if the bonding strength can be sufficiently secured.

  Further, as the sound absorbing material 68, known materials can be used as appropriate in addition to the exemplified materials. The sound absorbing material 68 may be non-breathable.

  In addition, the present invention can be similarly applied to any exhaust gas treatment device for a fuel cell used in various applications in addition to the exhaust gas treatment device for a fuel cell mounted on a fuel cell vehicle. Of course there is.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

It is longitudinal cross-sectional explanatory drawing which shows one Embodiment of the exhaust gas processing apparatus of the fuel cell according to this invention, Comprising: It is a figure equivalent to the II cross section in FIG. It is II-II sectional explanatory drawing in FIG. FIG. 5 is a longitudinal cross-sectional explanatory view of a first divided body constituting the exhaust gas processing apparatus shown in FIG. 1, corresponding to a cross section taken along line III-III in FIG. 4. It is IV arrow explanatory drawing in FIG. FIG. 7 is a longitudinal cross-sectional explanatory view of a third divided body constituting the exhaust gas processing apparatus shown in FIG. 1, corresponding to a VV cross section in FIG. 6. It is VI arrow explanatory drawing in FIG. It is a longitudinal cross-sectional explanatory drawing of the division body formation part used in forming the 2nd division body which comprises the exhaust gas processing apparatus shown by FIG. 1, Comprising: It is a figure equivalent to the VII-VII cross section in FIG. is there. It is VIII-VIII cross-section explanatory drawing in FIG. It is explanatory drawing which shows an example of the manufacturing process of the exhaust gas processing apparatus shown by FIG. 1, Comprising: The state which has joined the 1st division body and the 2nd division body integrally is shown. It is explanatory drawing which shows the example of a process performed following the process shown by FIG. 9, Comprising: With respect to the joined body by which the 1st division body and the 2nd division body were integrally joined, a 3rd division body is provided. It shows a state of being integrally joined. It is a figure corresponding to FIG. 1 which shows another embodiment of the exhaust gas processing apparatus shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Apparatus main body 18 Front side division body 20 Rear side division body 22 Intermediate division body 34 Gas introduction port 35 Air introduction port 42 Outlet port 44 Division body formation part 48 1st inner half cylinder part 50 2nd inner half cylinder part 66 Through-hole 68 Sound absorbing material 70 Storage space 72 Air flow path 74 Gas intrusion part

Claims (7)

The hydrogen gas discharged from the anode electrode side is introduced into the inside through the gas introduction port, and the accommodation space to be accommodated and the air discharged from the cathode electrode side are introduced into the inside from the air introduction port to be circulated. An air flow path that discharges into the atmosphere through the discharge port is defined with a partition member inside the apparatus main body, and hydrogen gas stored in the storage space is further allowed to enter the air flow path. A gas intrusion portion is provided in the apparatus main body, and hydrogen gas in the accommodation space is mixed into the air flowing through the air flow path through the gas intrusion portion, thereby diluting the hydrogen gas with the air. In the exhaust gas treatment device for a fuel cell configured to be discharged into the atmosphere from the discharge port together with the air,
A first divided body having the gas introduction port and the air introduction port; a second divided body in which the air flow path and the accommodation space are defined inside the partition member; and the exhaust. The apparatus main body is configured with a divided structure in which the gas intrusion portion is provided integrally with the third divided body having an outlet and the second main body of the apparatus main body. The divided body is at least one arbitrarily selected from a plurality of divided body forming parts in which at least a part of the air flow path and at least a part of the accommodation space are defined with the partition member therebetween. An exhaust gas treatment device for a fuel cell, characterized in that it is formed using two.   By removing the partition member at at least a part of a portion of the air flow path corresponding to the downstream portion in the air flow direction, the air flow path and the storage space are communicated with each other. 2. A communication part that allows intrusion of hydrogen gas accommodated in the air flow path is formed in the apparatus main body, and the gas intrusion part is constituted by the communication part. 2. An exhaust gas treatment device for a fuel cell according to 1.   The cross-sectional area of the flow of the hydrogen gas that is caused to flow from the gas inlet side toward the gas intrusion portion side in the housing space of the apparatus main body is larger than the opening area of the gas inlet port. The exhaust gas treatment device for a fuel cell according to claim 1 or 2, wherein the hydrogen gas is allowed to flow while diffusing in the accommodation space.   The cross-sectional area of the air flow path is larger than the opening area of the air introduction port, and the air introduced into the air flow path through the air introduction port passes through the air flow path. The exhaust gas processing apparatus for a fuel cell according to any one of claims 1 to 3, wherein the exhaust gas processing apparatus is configured to flow toward the exhaust port while diffusing.   Among the partition member, a plurality of through holes are formed in an upstream portion located upstream of the gas intrusion portion in the air flow direction in the air flow path, and the plurality of through holes of the partition member 5. The sound absorbing material according to claim 1, wherein the sound absorbing material is disposed in contact with the surface on the side of the accommodation space in the formation site to cover all of the plurality of through holes. Fuel cell exhaust gas treatment equipment.   The exhaust gas treatment device for a fuel cell according to claim 5, wherein a holding portion for sandwiching the sound absorbing material with the partition member is provided inside the device main body. The hydrogen gas discharged from the anode electrode side is introduced into the inside through the gas introduction port, and the accommodation space to be accommodated and the air discharged from the cathode electrode side are introduced into the inside from the air introduction port to be circulated. An air flow path that discharges into the atmosphere through the discharge port is defined with a partition member inside the apparatus main body, and hydrogen gas stored in the storage space is further allowed to enter the air flow path. A gas intrusion portion is provided in the apparatus main body, and hydrogen gas in the accommodation space is mixed into the air flowing through the air flow path through the gas intrusion portion, thereby diluting the hydrogen gas with the air. A method of manufacturing an exhaust gas treatment device for a fuel cell configured to be discharged into the atmosphere from the discharge port together with the air,
Preparing a first divided body having the gas inlet and the air inlet;
At least a part of the air flow path and at least a part of the accommodating space are arbitrarily selected from a plurality of divided body forming parts defined inside with the partition member therebetween, and used. Preparing a second divided body comprising the at least one divided body forming part, constituting a part different from the first divided body in the apparatus main body;
A third divided body is provided which has the discharge port and is provided with the gas intrusion portion therein and which constitutes another part of the apparatus main body, which is different from the first and second divided bodies. And a process of
Assembling and integrally joining the first divided body on the upstream side in the air flow direction of the air flow path in the second divided body;
Assembling the third divided body on the downstream side in the air flow direction of the air flow path in the second divided body, and joining them together;
A method for manufacturing an exhaust gas treatment device for a fuel cell, comprising:

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