JP5315767B2 - Exhaust gas discharge device for fuel cell system and fuel cell system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust gas discharger for a fuel cell system, wherein the wind-resistant performance can be improved. <P>SOLUTION: An exhaust gas discharger 300, which is provided in a housing 50 for housing fuel cells, includes an exhaust muffler member 400 having an exhaust port 401 in communication with the open air and a blow-off pipe 500 that is provided in the housing 50 in opposition to the exhaust muffler member 400 and has a blow-off outlet 501 for blowing off the exhaust gas generated in a fuel cell system. With the relative indication where the opening area of the exhaust port 401 is 100, the facing polymerization degree of the exhaust port 401 and the blow-off outlet 501 is set up at 30 or less of the opening area of the exhaust port 401. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an exhaust gas exhaust device for a fuel cell system and a fuel cell system.

A fuel cell system is generally disposed in a housing having a housing chamber, a reformer that is disposed in the housing chamber of the housing and reforms a fuel material to generate anode gas, and a housing chamber in the housing. And a stack of fuel cells to which anode gas is supplied. An exhaust port for exhausting the exhaust gas of the reformer and the exhaust gas obtained by burning the anode off-gas of the stack is provided on the wall of the housing that houses such a fuel cell system (Patent Document 1).
JP 2006-140165 A

  The wind resistance of the exhaust port described above is not always sufficient, and if external wind blows into the exhaust port, the ability to exhaust the exhaust gas from the exhaust port may be reduced. In some cases, exhaust gas that should be exhausted from the exhaust port to the outside air may flow back into the interior. In this case, the smooth power generation operation of the fuel cell system may be hindered.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an exhaust gas exhaust device for a fuel cell system and a fuel cell system that can improve wind resistance.

(1) An exhaust gas exhaust apparatus for a fuel cell system according to the first aspect of the present invention includes: (i) an exhaust port that is provided in a housing that accommodates a fuel cell of the fuel cell system and communicates with the outside air and an exhaust port that communicates with the exhaust port An exhaust muffler member having a chamber, and (ii) a discharge pipe provided in the casing so as to face the exhaust muffler member and blowing out exhaust gas generated in the fuel cell system and having a blowout port communicating with the exhaust chamber. (Iii) In relative display, when the opening area of the air outlet is 100, in the direction parallel to the central axis of the air outlet , the degree of facing polymerization that the air outlet and the air outlet face is the opening area of the air outlet . It is characterized by being set to 30 or less.

  (2) A fuel cell system according to the second aspect of the present invention includes: (i) a housing having a housing chamber; and (ii) a modified fuel material disposed in the housing chamber of the housing to generate anode gas by reforming the fuel material. A reformer having a mass part and a combustion part for heating the reforming part, and (iii) a fuel which is disposed in the housing chamber of the housing and is supplied with an anode gas and a cathode supplied with a cathode gas A battery stack, (iv) an exhaust gas exhaust pipe that is disposed in the housing chamber of the casing and exhausts exhaust gas discharged from the combustion section or stack of the reformer toward the outside air, and (v) an outer wall surface of the casing And an exhaust gas exhaust device that is attached and communicates with the exhaust gas exhaust pipe. The exhaust gas exhaust device is an exhaust gas exhaust device according to the aspect described above.

  (3) The exhaust gas is a gas that is generated and discharged in the power generation operation of the fuel cell system. Examples of the exhaust gas include reformer exhaust gas, fuel cell cathode gas exhaust gas, and fuel cell anode gas exhaust gas.

The degree of face-to-face polymerization of the exhaust port and the air outlet means the degree to which the exhaust port of the muffler member and the air outlet of the outlet pipe are facing each other in the direction parallel to the central axis of the air outlet in the exhaust gas exhaust device. To do. When the opening area of the outlet is 100 in relative display, the degree of facing polymerization is preferably 30 or less, 20 or less, and 10 or less. Furthermore, 5 or less and 0 are preferable. In this case, in order to improve wind resistance, it is preferable that the exhaust port of the exhaust muffler member and the outlet of the outlet pipe are opened in opposite directions. In this case, it is preferable that the exhaust port and the outlet are arranged so as to sandwich the central axis of the outlet pipe.

  According to the present invention, the following modes can be adopted.

  -In the cross section which passes along the central axis of an outlet pipe along the central axis of an outlet pipe, it is preferable that the central axis of an exhaust port and the central axis of an outlet pipe intersect. In this case, since the degree of face-to-face polymerization at the exhaust port and the air outlet can be reduced, the wind resistance of the exhaust gas exhaust device can be improved.

  -It is preferable that the exhaust muffler member and the outlet pipe are connected. In this case, the exhaust muffler member and the outlet pipe are integrated into a unit.

  -It is preferable that the exhaust muffler member is changeable in direction with respect to the housing. In this case, since the direction of the exhaust port can be changed, the wind resistance of the exhaust gas discharge device can be adjusted.

  -Preferably, a blower pipe has a drainage passage. The water discharge passage allows the exhaust chamber of the exhaust muffler member to communicate with the inside of the outlet pipe, and allows water present in the exhaust chamber of the exhaust muffler member to escape to the inside of the outlet pipe. In this case, the water existing in the exhaust chamber of the exhaust muffler member can be released to the inside of the outlet pipe through the water escape passage.

  -Preferably, the outlet of the outlet pipe protrudes into the exhaust chamber of the exhaust muffler member, and in the height direction, the lower end of the outlet of the outlet pipe removes water present in the exhaust chamber from the lower end of the outlet of the exhaust muffler member Is set to a lower position. In this case, the water existing in the exhaust chamber of the exhaust muffler member can be released to the inside of the outlet pipe through the outlet of the outlet pipe.

  As described above, according to the present invention, it is possible to provide an exhaust gas exhaust device for a fuel cell system and a fuel cell system that can improve wind resistance.

(Embodiment 1)
1 to 3 show a first embodiment. The exhaust gas discharge device 300 discharges exhaust gas generated in the fuel cell system to the outside air. As shown in FIG. 1, the exhaust gas discharge device 300 is provided on a mounting wall portion 59 that extends in a horizontal direction and forms a flat shape of a housing 50 that houses a fuel cell. The exhaust gas exhaust device 300 includes an exhaust muffler member 400 based on a metal or hard resin having an exhaust port 401 for communicating with outside air, and a metal having an exhaust port 501 for blowing off exhaust gas generated in the fuel cell system. It has the blowing pipe 500 which makes hard resin a base material.

  As shown in FIG. 1, the exhaust muffler member 400 has a disk shape in which the blow-out pipe 500 is protruded, and the first member 402 and the second member 403 are formed so as to form a hollow exhaust chamber 410. They are formed by welding, adhesive or screwing. Here, the exhaust muffler member 400 includes a hollow exhaust chamber 410 provided in the center, a mounting flange portion 412 having a hook shape extending radially outward and circumferentially around the exhaust chamber 410, And a plurality of mounting holes 414 formed in the flange portion 412. As shown in FIG. 2, a plurality (two) of attachment holes 414 are formed in the attachment flange portion 412 at a phase of a predetermined angle (180 degrees) with respect to the central axis PA of the outlet pipe 500. However, the number is not limited to two, and may be three or more, four or more, or six or more as necessary.

  As shown in FIG. 1, also in the attachment wall portion 59 of the housing 50, an insertion port 590 is formed so as to pass through this, and a plurality of attachment holes 599 are formed around the insertion port 590. In the storage chamber 50x of the housing 50, an exhaust gas discharge pipe 580 is provided below the insertion port 590. Here, as shown in FIG. 1, the front end portion 580 a of the exhaust gas discharge pipe 580 is along the vertical direction and faces the insertion port 590 of the mounting wall portion 59 of the housing 50. A ring-shaped seal holding portion 581 is formed at the distal end portion 580 a of the exhaust gas discharge pipe 580. A ring-shaped seal member 582 made of a seal material is attached to the seal holding portion 581. A fastener 460 having a nut shape is fixed to the inner surface side of the mounting wall portion 59 of the housing 50 by welding or the like. Note that the other end of the exhaust gas discharge pipe 580 is connected to the combustion section of the reformer via a condenser. Therefore, the combustion exhaust gas combusted in the combustion part of the reformer is discharged from the exhaust gas discharge pipe 580.

  As shown in FIG. 1, the exhaust muffler member 400 and the outlet pipe 500 are connected substantially coaxially by welding, adhesive, screwing, or the like to be an integrated product, which is a unit product 430. Here, the central axis PA of the distal end portion 580 a of the outlet pipe 500 extends in a substantially orthogonal state with respect to the attachment flange portion 412 of the exhaust muffler member 400.

  In attaching the exhaust gas discharge device 300 to the attachment wall portion 59 of the casing 50, as shown in FIG. 1, the tip portion 500a of the blow-out pipe 500 having a cylindrical shape is attached to the casing 50 as shown in FIG. It is inserted into the insertion port 590 of the wall part 59. Further, the fixture 445 having the male screw portion 445 c is inserted into the attachment hole 599 of the attachment flange portion 412 via the elastic seal member 440. As a result, the male screw portion 445 c of the fixture 445 is screwed into the female screw portion 460 f of the fastener 460 on the inner surface 59 i side of the mounting wall portion 59 of the housing 50. Thereby, as shown in FIG. 3, the exhaust gas discharge device 300 (unit product 430) is detachably attached to the attachment wall portion 59 of the housing 50.

  Here, the fastener 460 may not be fixed to the inner surface side of the mounting wall portion 59 of the housing 50, and in short, it may be disposed on the inner surface side of the mounting wall portion 59 of the housing 50. Note that the fastener 460 having the female screw portion may be eliminated, and the female screw portion may be formed directly on the mounting wall portion 59 of the housing 50.

  As described above, when the exhaust gas discharge device 300 is attached to the attachment wall portion 59 of the housing 50, as can be understood from FIG. 3, the tip portion 500 a of the outlet pipe 500 of the unit product 430 is inserted into the exhaust gas discharge pipe 580. Is done. At this time, the outer peripheral wall surface of the distal end portion 500 a of the blow-out pipe 500 hits the inner peripheral portion of the seal member 582 of the distal end portion 580 a of the exhaust gas discharge pipe 580. Therefore, the outlet pipe 500 and the exhaust gas discharge pipe 580 are sealed in an airtight state and / or a liquid tight state. Further, the insertion port 590 is sealed in an airtight state and / or a liquid tight state by the elastic seal member 440 also between the exhaust gas discharge device 300 and the mounting wall portion 59 of the housing 50. In this case, even when the pressure of the exhaust gas pulsates, abnormal vibrations of the blowing pipe 500 and the like are suppressed by the damper function of the seal member 582 and the elastic seal member 440.

FIG. 3 shows a state in which the exhaust gas discharge device 300 is attached to the attachment wall portion 59 of the housing 50. FIG. 3 shows a cross section passing through the central axis PA along the central axis PA of the outlet pipe 500. In FIG. 3, the central axis PA of the outlet pipe 500 extends in the vertical direction along the vertical line. The outlet 501 of the outlet pipe 500 is directed sideways and faces the wall 400w of the exhaust muffler member 400. As a result, the outlet 501 is opened sideways in the exhaust chamber 410 of the exhaust muffler member 400. Therefore, as can be understood from FIG. 3, the exhaust gas flowing through the exhaust gas discharge pipe 580 hits the closing wall 502 at the tip of the blow pipe 500 and is blown out from the blow outlet 501 of the blow pipe 500 to the side (in the direction of the arrow X1). After being discharged toward the outside, it collides with the inner wall surface of the wall 400w of the exhaust muffler member 400, and further flows around the peripheral wall 503 of the outlet pipe 500 in the direction of arrow XF around the central axis PA. It is emitted toward 700 in the direction of arrow X2. When the exhaust gas collides with the closed wall 502 at the tip of the blow-out pipe 500, since the collision property is high, the moisture contained in the exhaust gas is easily dropped. Water droplets adhering to the inner surface of the closed wall 502 are likely to fall inside the blowing pipe 500 due to gravity. Here, according to this embodiment, the center axis line of the blower outlet 501 is shown as PC (refer FIG. 2). In relative display, when the opening area of the outlet 501 is 100, the degree of facing polymerization that the exhaust outlet 401 and the outlet 501 face in the direction parallel to the central axis PC is 20 of the opening area of the outlet 501. It is set as follows. Specifically, as shown in FIG. 2, the outlet 501 of the outlet pipe 500 and the exhaust outlet 401 of the exhaust muffler member 400 are opened in opposite directions, and the exhaust outlet 401 and the outlet 501 are mutually connected. Not meeting. That is, as can be understood from FIG. 2, the exhaust outlet 401 and the outlet 501 are arranged so as to sandwich the central axis PA of the outlet pipe 500.

Therefore, when the opening area of the outlet 501 is 100 in relative display, the degree of facing polymerization that the exhaust outlet 401 and the outlet 501 face in the direction parallel to the central axis PC of the outlet 501 is the degree of facing polymerization of the outlet 501 . It is substantially 0 of the opening area. Therefore, the wind resistance of the exhaust gas discharge device 300 can be improved. Therefore, even if the strong wind of the outside air 700 is blown into the exhaust port 401 of the exhaust gas discharge device 300, it is suppressed that the wind blows directly into the blow pipe 500 from the blow outlet 501. Furthermore, it is also suppressed that rainwater blows directly from the outlet 501 into the outlet pipe 500.

  As shown in FIG. 3, a closing wall 502 is provided at the distal end (upper end) of the distal end portion 500 a of the blowing pipe 500. The closing wall 502 of the outlet pipe 500 and the peripheral wall 503 of the outlet pipe 500 face the exhaust port 401 of the exhaust muffler member 400. Therefore, even when the wind of the outside air 700 blows into the exhaust chamber 410 from the exhaust port 401 of the exhaust muffler member 400, the peripheral wall 503 exhibits a baffle plate function, and the closed wall 502 of the outlet pipe 500 and the peripheral wall of the outlet pipe 500. 503 can face the wind and rainwater blown into the exhaust chamber 410 from the exhaust port 401. In this sense, wind resistance and rainwater resistance are improved.

  Even if condensed water accumulates in the exhaust chamber 410 of the exhaust muffler member 400, the bottom 401r of the exhaust muffler member 400 and the lower side 501d of the outlet 501 are the same height. For this reason, water such as condensed water accumulated in the bottom 401r flows into the exhaust gas discharger 580 from the lower side 501d of the outlet 501.

  If the wind resistance of the exhaust gas exhaust device 300 is improved in this way, the combustion reaction in the combustion part of the reformer to which the blow-out pipe 500 communicates is well maintained, the combustion reaction in the combustion part is stabilized, and the reforming part The temperature can be stabilized. As a result, the composition of the reformed gas (anode gas) can be stabilized, and the power generation operation of the fuel cell system is favorably maintained. In this sense, improvement in wind resistance is important.

  According to the present embodiment, when the exhaust gas discharge device 300 is assembled to the casing 50, the unit flange 430 of the unit product 430 is rotated by a predetermined angle (180 degrees) around the central axis PA of the blow-out pipe 500. The direction of the exhaust port 401 of the exhaust muffler member 400 constituting the product 430 can be changed by a predetermined angle (180 degrees). In this case, since the exhaust muffler member 400 and the outlet pipe 500 are integrally connected, the direction of the exhaust port 401 of the exhaust muffler member 400 is changed in the circumferential direction. Then, the directivity direction of the blower outlet 501 of the blower pipe 500 is changed corresponding to the change of the directivity direction of the exhaust port 401 of the exhaust muffler member 400. Therefore, even if the mounting flange portion 412 of the unit product 430 is rotated by a predetermined angle (180 degrees) around the central axis PA of the outlet pipe 500, the exhaust port 401 and the outlet port 501 do not face each other and are opposite to each other. Since the state oriented in the direction is maintained, the wind resistance of the exhaust gas discharge device 300 can be maintained.

  In many cases, the housing 50 is installed such that the longitudinal direction of the housing 50 is along the wall of a building such as a house. According to the Building Standard Law, it is necessary to secure a distance between a building such as a house and the exhaust port 401 of the housing 50. The distance varies depending on the direction of the exhaust port 401. If the distance between the wall of the building and the exhaust port 401 cannot be secured, the housing 50 may be installed by changing the direction of the exhaust port 401. Therefore, if the direction of the exhaust port 401 can be changed as in the present embodiment, an advantage that the degree of freedom of installation is expanded can be obtained.

  According to the present embodiment, as shown in FIG. 3, the attachment flange 412 of the exhaust muffler member 400 is extended radially outward with respect to the outlet pipe 500, and is attached to the attachment wall 59 of the housing 50. On the other hand, the installation area can be increased. Therefore, the installation property and attachment property of the exhaust gas discharge device 300 can be improved with respect to the attachment wall portion 59 of the housing 50. Therefore, even if the exhaust gas blown out from the outlet 501 of the outlet pipe 500 has pulsation, abnormal vibration, rattling, etc. of the exhaust gas discharge device 300 can be effectively suppressed. In particular, the mounting flange portion 412 of the exhaust muffler member 400 is continuously extended in the circumferential direction in addition to the radially outward direction with respect to the blow-out pipe 500, so The installation area can be increased. Therefore, the installation property and attachment property of the exhaust gas discharge device 300 can be further improved with respect to the attachment wall portion 59 of the housing 50.

  Further, the outer peripheral wall surface of the distal end portion 500 a of the blow-out pipe 500 hits the inner peripheral portion of the seal member 582 of the distal end portion 580 a of the exhaust gas discharge pipe 580 and is sealed. For this reason, as described above, even if pulsation occurs in the exhaust gas blown out from the outlet 501 of the outlet pipe 500, abnormal vibration of the exhaust gas discharge device 300 can be suppressed. Furthermore, since the elastic seal member 440 also seals between the exhaust gas discharge device 300 and the mounting wall portion 59 of the housing 50, abnormal vibration of the exhaust gas discharge device 300 can be suppressed.

  Further, according to the present embodiment, the outlet pipe 500 and the exhaust muffler member 400 are connected to each other and integrated. For this reason, the structure where the blower outlet 501 of the blower pipe 500 and the exhaust outlet 401 of the exhaust muffler member 400 are directed in opposite directions is maintained semipermanently. Therefore, the trouble that the exhaust gas discharge device 300 is attached to the housing 50 in a state where the exhaust port 401 and the air outlet 501 mistakenly face each other during maintenance is suppressed. For this reason, wind resistance can be maintained semipermanently. The blow-out pipe 500 and the exhaust muffler member 400 are connected and integrated with each other to form a unit product, and can be easily replaced with respect to the housing 50 by removing the fixture 445.

  According to this embodiment, as shown in FIG. 1, the opening width of the blower outlet 501 is shown by W1, and the opening width of the exhaust port 401 is shown by W2. In the direction in which the distal end portion 500a of the outlet pipe 500 is extended, that is, in the height direction (arrow H direction), the outlet 501 and the exhaust outlet 401 are formed at positions that do not overlap each other. For this reason, wind resistance can be further improved.

  Further, according to the present embodiment, as shown in FIG. 3, the outer diameter of the mounting flange portion 412 of the exhaust gas exhaust device 300 having a disk shape is indicated as DA, and the chamber height of the exhaust chamber 410 is indicated as HA. Here, DA / HA is in the range of 3-20, in the range of 4-100, in particular in the range of 4-6. Thereby, flattening of the exhaust gas discharge device 300 in a state assembled to the mounting wall portion 59 of the housing 50 can be realized, and excessive protrusion to the outside air 700 is suppressed. Therefore, even when the casing 50 and the wall of the building are brought close to each other, the exhaust gas exhaust device 300 is prevented from colliding with or interfering with a building instrument or the like existing in the vicinity of the casing 50. ing. In addition, as shown in FIG. 3, the front-end | tip part 500a of the blowing pipe 500 is orientated toward the inside of the storage chamber 50x of the housing | casing 50, and the excessive protrusion to the external air 700 is suppressed also in this meaning. .

  Note that, according to the present embodiment in which the mounting wall portion 59 of the housing 50 is extended in the horizontal direction, the central axis PA of the outlet pipe 500 is along the vertical direction. If the orientation of the mounting wall portion 59 has changed, the central axis PA of the outlet pipe 500 is adjusted accordingly.

(Embodiment 2)
4 to 6 show the second embodiment. Since this embodiment basically has the same configuration and the same function and effect as those of the first embodiment, common portions are denoted by common reference numerals. Also in the present embodiment, the exhaust gas discharge device 300B is provided on the attachment wall portion 59 of the housing 50 that houses the fuel cell of the fuel cell system. The exhaust gas exhaust device 300B includes a metal having an exhaust port 401B for communicating with the outside air 700 or an exhaust muffler member 400B based on a hard resin and a metal having an outlet 501B for blowing out exhaust gas generated in the fuel cell system. Or it has the blowing pipe | tube 500B which uses hard resin as a base material.

  FIG. 4 shows a cross section passing through the central axis PA along the central axis PA of the outlet pipe 500B (outlet 501B). The central axis PA is along the vertical direction. However, it may be along the horizontal direction. As shown in FIG. 4, the central axis PA of the outlet pipe 500B (the outlet 501B of the outlet pipe 500B) and the central axis PB of the exhaust outlet 401B intersect each other. Specifically, both cross in an almost orthogonal state. Therefore, the outlet 501B provided at the tip of the outlet pipe 500B is open upward in the vertical direction in the exhaust chamber 410B of the exhaust muffler member 400B. On the other hand, the exhaust port 401B of the exhaust muffler member 400B is open laterally with respect to the vertical direction. Thus, the blower outlet 501B and the exhaust outlet 401B are opened in different directions so as not to face each other. Furthermore, as shown in FIG. 4, in the direction in which the central axis PA of the outlet pipe 500B (outlet outlet 501B) extends, that is, in the height direction (arrow H direction), between the outlet outlet 501B and the upper end of the exhaust outlet 401B. Is provided with a deviation amount ΔH, and the outlet 501B and the exhaust outlet 401B are arranged so as not to overlap in the direction in which the central axis PA extends. In this case, wind resistance can be improved.

According to the above-described embodiment, in the relative display, when the opening area of the outlet 501B of the outlet pipe 500B is 100, the exhaust outlet 401B in a direction parallel to the central axis PA (see FIG. 4) of the outlet 501B. The degree of facing polymerization that the air outlet 501B faces is set to 30 or less of the opening area of the air outlet 501B . Specifically, as shown in FIG. 4, as described above, the outlet 501B and the exhaust outlet 401B are opened in different directions, and the exhaust outlet 401B and the outlet 501B do not face each other. Therefore, in relative display, when the opening area of the outlet 501B of the outlet pipe 500B is 100, the exhaust outlet 401B and the outlet 501B face each other in a direction parallel to the central axis PA (see FIG. 4) of the outlet 501B. The degree of facing polymerization is substantially 0 of the opening area of the outlet 501B . Therefore, even when the wind blows from the exhaust port 401B, the peripheral wall 503 of the outlet pipe 500B facing the exhaust port 401B exhibits a baffle plate function, and the wind resistance of the exhaust gas exhaust device 300B can be improved. Therefore, even if the wind of the outside air 700 is blown into the exhaust port 401B of the exhaust gas discharge device 300B, it is suppressed that the wind blows directly into the blow pipe 500B from the blow outlet 501B.

  As shown in FIG. 4, the outlet 501B of the outlet pipe 500B faces the inner wall surface 460 of the exhaust chamber 410B of the exhaust muffler member 400B with an interval ΔK. Here, the inner wall surface 460 includes a collision wall surface 461 that directly faces the air outlet 501 </ b> B, and an inclined wall surface 462 formed around the collision wall surface 461. The collision wall surface 461 extends along the direction intersecting (orthogonal) with respect to the central axis PA of the outlet 501B, and enhances the collision property of the exhaust gas blown out from the outlet 501B. In addition, the inclined wall surface 462 is inclined in a conical shape so that the inner diameter increases as it approaches the air outlet 501B.

  Here, when the exhaust gas blown out from the outlet 501B in the direction of the arrow X1 hits the inner wall surface 460 of the exhaust chamber 410B, the ring-shaped space 463 around the entire circumference of the outlet pipe 500B along the inclined wall surface 462 of the exhaust chamber 410B. And is further discharged from the exhaust port 401B toward the outside air 700 in the direction of the arrow X2. As shown in FIG. 4, since the exhaust gas blown out from the outlet 501B collides with the inner wall surface 460 of the exhaust chamber 410B in a substantially right angle state, the frontal collision property of the wet exhaust gas having high humidity can be improved. Therefore, it can contribute to shaking off moisture contained in the exhaust gas in a wet state by collision. In addition, after the collision, the exhaust gas can be guided along the inclined wall surface 462 toward the exhaust port 401B. The water droplets adhering to the collision wall surface 461 fall by gravity in the blowing pipe 500B.

  As shown in FIGS. 5 and 6, the exhaust muffler member 400 </ b> B has a plurality of attachment flange portions 412 </ b> B. Then, with the seal member 582B disposed on both the outer surface and the inner surface of the mounting wall portion 59 of the housing 50, the mounting tool 445B is attached to the mounting wall portion 59 of the housing 50 via the mounting flange portion 412B of the exhaust muffler member 400B. Attach to. Thus, the exhaust gas discharge device 300B is detachably attached to the attachment wall portion 59 of the housing 50.

(Embodiment 3)
FIG. 7 shows a third embodiment. The present embodiment has basically the same configuration and operational effects as the second embodiment. Due to the relationship with the fuel cell system, the exhaust gas discharged from the outlet 501B passes through the condenser and then is discharged to the outside air 700, but still has a high humidity and tends to generate condensed water. As shown in FIG. 7, a single or a plurality of first drainage passages 591 having a small hole shape are formed in the peripheral wall constituting the outlet pipe 500 </ b> B so as to penetrate the peripheral wall. The first water discharge passage 591 is located on the front side (above) of the seal member 582B, and communicates the inner peripheral surface and the outer peripheral surface of the outlet pipe 500B in the thickness direction thereof. Accordingly, the water accumulated excessively in the exhaust chamber 410B can be released from the exhaust chamber 410B through the first water discharge passage 591 into the passage of the outlet pipe 500B in the direction of the arrow X5, and eventually the other end of the outlet pipe 500B. It can escape to the condensed water storage chamber inside the condenser provided on the side.

  As shown in FIG. 7, a trap portion 595 having a container shape having a trap chamber 594 is provided on the outer peripheral side of the outlet pipe 500B. The seal member 582B forms a second drainage passage 592 for communicating the exhaust chamber 410B and the trap chamber 594. Accordingly, the water (condensed water) present in the exhaust chamber 401B of the exhaust muffler member 400B flows down the second drainage passage 592 of the seal member 582B due to gravity, and accumulates in the trap chamber 594 of the trap portion 595. Water in the trap chamber 594 is warmed by the air in the housing chamber 50x of the housing 50 and naturally dried. Since the storage chamber 50x stores one or both of the reformer and the stack, the water in the trap chamber 594 can be naturally dried during the power generation operation of the fuel cell system.

(Embodiment 4)
8 to 11 show a fourth embodiment. Also in the present embodiment, the exhaust gas discharge device 300C is provided on the mounting wall portion 59 along the horizontal direction of the housing 50 that houses the fuel cell of the fuel cell system. The exhaust gas exhaust device 300C includes an exhaust muffler member 400C based on a metal or a hard resin having a plurality of exhaust ports 401C for communicating with the outside air 700, and a blower for blowing exhaust gas generated in the fuel cell system. It has an outlet pipe 501C and an outlet pipe 500C based on a metal or hard resin.

  As shown in FIG. 8, the exhaust muffler member 400C has a hollow exhaust chamber 410C in the center, and a mounting flange portion 412C that has a hook shape extending radially outward and circumferentially around the exhaust chamber 410C. And a plurality of mounting holes 414C formed in the mounting flange portion 412C. As shown in FIG. 11, a plurality (two) of attachment holes 414 </ b> C are formed at a phase of a predetermined angle (180 degrees) with respect to the central axis PA of the outlet pipe 500. An insertion port 590 is also formed in the mounting wall portion 59 of the housing 50, and a plurality (two) of mounting holes 599 are formed at equal intervals around the insertion port 590.

  FIG. 10 shows a state in which the exhaust gas discharge device 300C is assembled. As shown in FIG. 10, the outlet pipe 500 </ b> C is disposed in the storage chamber 50 x of the housing 50. The outlet 501C of the outlet pipe 500C protrudes from the mounting wall 59 of the housing 50 toward the outside air 700 in a direction away from the storage chamber 50x, and is directed in the lateral direction (arrow X1 direction). An elastic seal member 440C having a ring shape made of a seal material is provided on a bottom wall portion 416C having a ring shape of the exhaust muffler member 400C. The elastic seal member 440C has a central hole 441C into which the distal end portion 500a of the blowing pipe 500C is inserted (press-fitted).

  FIG. 8 shows a state where the exhaust gas discharge device 300 </ b> C is attached to the attachment wall portion 59 of the housing 50. FIG. 8 shows a cross section passing through the central axis PA along the central axis PA of the outlet pipe 500C. In FIG. 8, the central axis PA of the outlet pipe 500C extends along the vertical direction. The outlet 501C of the outlet pipe 500C is opened in the lateral direction (arrow X1 direction) in the exhaust chamber 410C of the exhaust gas exhaust device 300. Therefore, as can be understood from FIG. 8, the exhaust gas blown out from the outlet 501C of the outlet pipe 500C in the lateral direction (in the direction of the arrow X1) then collides with the inner wall surface of the exhaust muffler member 400C, and further the exhaust muffler member 400C. It discharges | emits toward the external air 700 from the some exhaust port 401C in the arrow X2 direction. A central axis of the outlet 501C is shown as PD (see FIG. 8).

Here, according to the present embodiment, in the relative display, when the opening area of the outlet 501C is 100, the facing polymerization in which the exhaust outlet 401C and the outlet 501C face each other in the direction parallel to the central axis PD of the outlet 501C. The degree is set to 30 or less of the opening area of the outlet 501C . Specifically, as shown in FIG. 8, the outlet 501C and the exhaust outlet 401C are directed in opposite directions. That is, the exhaust outlet 401C and the outlet 501C do not face each other. Therefore, when the opening area of the outlet 501C is 100 in relative display, the degree of facing polymerization that the exhaust outlet 401C and the outlet 501C face in the direction parallel to the central axis PD of the outlet 501C is the degree of facing polymerization of the outlet 501C . It is substantially 0 of the opening area. Therefore, the wind resistance of the exhaust gas discharge device 300C can be improved. Therefore, even if the strong wind of the outside air 700 is blown into the exhaust port 401C of the exhaust gas discharge device 300C, the strong wind is prevented from blowing directly into the outlet 501C.

  According to the present embodiment, as can be understood from FIG. 11, when assembling the exhaust gas discharge device 300 </ b> C to the housing 50, the attachment flange portion 412 </ b> C of the exhaust gas discharge device 300 is rotated at a predetermined angle around the central axis PA of the blow pipe 500. 180 degrees), the direction in which the exhaust port 401C of the exhaust muffler member 400C is directed can be changed. When water accumulates in the bottom wall portion 416C of the exhaust chamber 410C, the water is released from the outlet 501C in the direction of the arrow X7 (see FIG. 8) into the outlet pipe 500C. For this reason, the lower end 500u of the outlet 501C of the outlet pipe 500C is set at a position lower than the lower end 401u of the outlet 401C in the height direction (arrow H direction).

(Embodiment 5)
FIG. 12 shows a fifth embodiment. Since this embodiment basically has the same configuration and effect as the fourth embodiment, common portions are denoted by common reference numerals. According to the present embodiment, as shown in FIG. 12, a plurality of mounting holes 414C formed in the mounting flange portion 412C are in phase with a predetermined angle (180 degrees) with respect to the central axis PA of the blowing pipe 500 ( 2) are formed. On the other hand, a plurality of (four) attached holes 599 formed in the housing 50 are formed at a phase of a predetermined angle (90 degrees) with respect to the central axis PA. Then, in assembling the exhaust gas discharge device 300C to the housing 50, if the attachment flange portion 412C of the exhaust gas discharge device 300 is rotated by a predetermined angle (90 degrees) around the central axis PA of the blow pipe 500, the relative displacement is obtained. The direction of the exhaust muffler member 400C can be changed, and the direction in which the exhaust port 401C is directed can be changed by 90 degrees. Four mounting holes 599 are formed, but eight may be formed at a phase of 45 degrees with respect to the central axis PA. In this case, the direction in which the exhaust port 401C is directed can be changed by 45 degrees. Furthermore, the number of attached holes 599 may be 5, 6, or 7 at regular intervals.

(Embodiment 6)
FIG. 13 shows a sixth embodiment. Since this embodiment basically has the same configuration and effects as the first embodiment, common portions are denoted by common reference numerals. According to the present embodiment, the exhaust gas discharge device 300D is provided on the mounting wall portion 59D along the vertical direction in the housing 50 that houses the fuel cell used in the fuel cell system. The exhaust port 401 of the exhaust muffler member 400 of the exhaust gas exhaust device 300 is directed downward so as to suppress the ingress of rainwater in the outside air 700. The outlet 501 of the outlet pipe 500 is directed upward in the exhaust chamber 410 of the exhaust muffler member 400. However, if necessary, the exhaust port 401 of the exhaust muffler member 400 may be directed upward. Further, the outlet 501 of the outlet pipe 500 may be directed downward in the exhaust chamber 410 of the exhaust muffler member 400.

(Application 1)
An example of a fuel cell system to which the above exhaust gas discharge device is applied will be described.
(overall structure)
Application 1 of the present invention will be described with reference to FIGS. This application mode is applied to a stationary fuel cell system that is fixedly installed in a general household, a business store, a building, or the like. The drawings are merely conceptual diagrams and do not define the details in detail. FIG. 14 schematically shows the concept of the fuel cell system. First, a schematic configuration of the fuel cell system will be described. The fuel cell system has a supply path 1 for reforming a fuel material as an anode gas and supplying it to the anode of the fuel cell, a reformer 2 that can function as an anode gas supply unit, and a fuel cell stack 3. In the supply path 1, from the upstream to the downstream, the fuel raw material source 4, the supply valve 5, the desulfurizer 6, the first pump 7 (fuel raw material transfer source), the valve 8, the reformer 2, the first condenser 9, the inlet The valve 10 and the fuel cell stack 3 are connected.

  The reformer 2 is formed by a reforming section 2a that generates an anode gas by steam reforming a fuel material, and a combustion section 2c that heats the reforming section 2a. A branch path 11 is branched from the upstream of the reforming section 2a of the supply path 1 toward the combustion section 2c.

  The fuel cell stack 3 includes an anode to which an anode gas is supplied, a cathode to which a cathode gas is supplied, and a polymer ion conductive membrane (for example, a fluorine-based or hydrocarbon-based membrane) sandwiched between the anode and the cathode. Proton conducting membrane). The fuel cell may be a system in which a plurality of sheet-type membrane electrode assemblies are stacked in the thickness direction, or a system in which a tube-type membrane electrode assembly is assembled.

  A cathode gas passage 12 for supplying cathode gas to the cathode inlet of the stack 3 is provided. The cathode gas passage 12 has an intake port 12i for sucking cathode gas (air). The cathode gas passage 12 is provided with a cathode gas pump 13 (cathode gas carrier source). A cathode offgas passage 14 is provided for discharging cathode offgas from the cathode outlet of the fuel cell. The cathode off gas passage 14 discharges the cathode off gas from the exhaust gas discharge device 14p to the outside air 700. The cathode offgas passage 14 is provided with a condenser 22 for condensing the cathode offgas. In the cathode gas passage 12, the stack 3 is arranged with the humidifier 15 adjacent thereto. The humidifier 15 humidifies the cathode gas before supplying it to the cathode of the stack 3. Here, the humidifier 15 includes a moisture absorption passage through which the cathode gas before flowing into the cathode of the stack 3 (dryer than the cathode off-gas) flows, and a cathode off-gas after flowing out from the cathode of the stack 3 (wet than the cathode gas). And a moisture retention film that partitions the moisture absorption passage and the humidification passage. In the humidifier 15, the cathode off-gas having a higher humidity and higher temperature than the cathode gas gives moisture and heat to the moisture retention film. The cathode gas having a lower humidity and lower temperature than the cathode off gas is humidified and heated by the moisture retention film.

  As shown in FIG. 14, a bypass path 16 extends from the upstream side of the inlet valve 10 in the supply path 1. A bypass valve 17 is provided in the bypass path 16. An anode off-gas passage 19 is provided from the anode outlet 3ap of the stack 3 toward the combustion section 2c of the reformer 2. The anode off gas passage 19 has an outlet valve 20 and a second condenser 21. A first drainage channel 24 extending from the first condenser 9 is connected to a water purifier 28 via a first drainage valve 23. A second drainage channel 26 extending from the second condenser 21 is connected to a water purifier 28 via a second drainage valve 27. A drainage channel 22 c extending from the condenser 22 is connected to a water purifier 28.

  The water generated by the water purifier 28 is supplied to the water tank 25 by a pump (not shown) or gravity. A reforming water passage 40 extends from the water tank 25 toward the inlet 2i of the reforming section 2a. The reforming water passage 40 is provided with a reforming water pump 41 and a reforming water valve 42.

  The startup time of the fuel cell system will be described. At startup, the first pump 7 (conveyance source) is driven to rotate with the supply valve 5 being open and the valve 8 being closed. Then, the gaseous fuel material of the fuel material source 4 flows into the supply path 1, is desulfurized by the desulfurizer 6, and is supplied to the combustion unit 2 c of the reformer 2.

  When the combustion air pump 33 is driven to rotate, the combustion air is supplied from the air passage 34 to the combustion unit 2c. As a result, the gaseous fuel material is burned in the combustion section 2 c by the air from the air passage 34. The reforming part 2a is gradually heated to a high temperature region by the combustion of the combustion part 2c. When the reforming unit 2a is heated to a high temperature region in this way, the control device opens the valve 8, and the fuel material of the fuel material source 4 is supplied to the reforming unit 2a. At this time, the reforming water pump 41 is driven to rotate and the reforming water valve 42 is opened by the control device. For this reason, the water of the water purifier 28 is supplied to the reforming unit 2a. As a result, the fuel material supplied to the reforming unit 2a is steam reformed by the reforming water. As a result, anode gas (hydrogen 20 mol% or more) containing hydrogen as a main component is generated. Thus, the anode gas produced | generated by the reformer 2 reduces a water | moisture content with the 1st condenser 9. FIG. The fuel material to be reformed may be a gas fuel or a liquid fuel. Specifically, city gas, LPG, kerosene, methanol, dimethyl ether, gasoline, biogas and the like can be employed.

  At the beginning of startup, the composition of the anode gas is not always stable. For this reason, at the beginning of startup, the control device closes the inlet valve 10 and the outlet valve 20, but the bypass valve 17 is opened. Therefore, at the beginning of startup, the anode gas is not supplied to the anode of the stack 3, but is supplied to the second condenser 21 via the bypass passage 16 and the bypass valve 17, and after the moisture is removed by the second condenser 21, The fuel is supplied to the combustion unit 2c and burned. When a predetermined time elapses from the start and the composition of the anode gas is stabilized, the inlet valve 10 and the outlet valve 20 are opened, and the anode gas is supplied to the anode inlet of the stack 3 through the inlet valve 10.

  Further, since the cathode gas pump 13 is driven, the cathode gas supplied from the cathode gas passage 12 flows from the inlet 15i to the humidifier 15 and is humidified by the humidifier 15, and then supplied from the cathode inlet of the stack 3 to the cathode. Is done. In this way, with the load (the load operated by the electric energy of the stack 3) connected to the stack 3, a power generation reaction is performed in the stack 3 by the anode gas and the cathode gas, and electric energy is generated. Since the anode off gas after the power generation reaction may have a combustible component, the anode off gas is discharged from the anode outlet of the stack 3 and flows from the anode off gas passage 19 to the second condenser 21 via the outlet valve 20. After the water is condensed by the two condenser 21, it is supplied to the combustion section 2c, burned, and reused.

  Here, during the power generation operation of the fuel cell system, condensed water is gradually stored in a condenser such as the first condenser 9, the second condenser 21, and the condenser 22. When the first drain valve 23 is opened, the condensed water accumulated in the first condenser 9 is supplied by gravity to the water purifier 28 via the first drain passage 24. When the second drain valve 27 is opened, the condensed water accumulated in the second condenser 21 is supplied to the water purifier 28 by gravity through the second drain path 26. The condensed water accumulated in the condenser 22 is supplied to the water purifier 28 by gravity through the drainage channel 22c. Condensed water collected in the water purifier 28 is generated by the water purifier 28 and purified. Here, when the reforming water pump 41 is driven to rotate and the reforming water valve 42 is opened, the water in the water purifier 28 is supplied to the reforming unit 2a. As a result, the fuel material supplied to the reforming unit 2a is steam reformed by the reforming water. The reforming water used for steam reforming preferably has a high purity.

  As described above, when the stack 3 performs the power generation operation, the stack 3 is heated. When the stack 3 becomes excessively high in temperature, the power generation performance of the stack 3 decreases. Therefore, a stack cooling passage 45 is provided for cooling the stack 3 by flowing a stack coolant through the stack 3 during operation of the fuel cell system. The stack cooling passage 45 is provided with an ion exchanger 46 (first maintenance component). The ion exchanger 46 purifies the stack coolant and improves the electrical insulation of the stack coolant. In addition, when the electrical insulation of the stack coolant decreases, the extraction efficiency of the electric energy extracted from the stack 3 decreases.

  15 and 16 schematically show a vertical cross section of the casing 50 of the fuel cell system. FIG. 15 is a longitudinal sectional view schematically showing a state in which the casing 50 is cut along the longitudinal direction (L1 direction) and along the vertical line. FIG. 16 is a longitudinal sectional view schematically showing a state in which the casing 50 is cut along the width direction (L2 direction) and along the vertical line. Here, the longitudinal direction of the casing 50 means a direction in which the longest dimension extends in the direction along the horizontal direction in the casing 50 having a rectangular parallelepiped shape. The width direction of the housing 50 means a direction that intersects the longitudinal direction of the housing 50 in the direction along the horizontal direction of the housing 50 having a rectangular parallelepiped shape.

  As shown in FIG. 15, the fuel cell system according to this embodiment includes a casing 50, a reformer 2, and a stack 3. The housing 50 has a bottom wall portion 50b, a ceiling wall portion 50u, and a side surface portion 50t. In FIG. 15, in the direction along the bottom wall 50b or the ceiling wall 50u along the horizontal direction of the housing 50, the direction in which the longest dimension extends is the longitudinal direction (arrow L1 direction).

  As shown in FIG. 15, the storage chamber 50 x of the housing 50 includes a large-capacity main storage chamber 51, a compartment 53 that is maintained at a lower temperature than the main storage chamber 51 and has a smaller volume than the main storage chamber 51, And a partition wall 55 that partitions the main storage chamber 51 and the compartment 53. The compartment 53 functions as a maintenance chamber for storing maintenance parts, and is located on the side of the main storage chamber 51. The wall forming the housing 50 functions as a partition wall, and includes a metal wall 50f and a heat insulating layer 50s formed of a heat insulating material provided on the inner surface of the wall 50f. The heat insulating layer 50s has a heat insulating and soundproofing action. In addition, although the housing | casing 50 has comprised square box shape, it is not limited to this.

  As shown in FIG. 15, the compartment 53 is formed in a longitudinal direction so as to be away from the reformer 2 and the stack 3 in order to avoid a thermal effect from the reformer 2 that can be a heat radiation source together with the stack 3 in the casing 50. In the direction (arrow L1 direction), it is provided on the end side opposite to the reformer 2.

  The partition wall 55 includes a metal plate 55f made of metal (for example, carbon steel, alloy steel, and aluminum alloy) and a heat insulating layer 55s formed of a heat insulating material provided on the inner surface of the metal plate 55f. The heat insulating layer 55s has a heat insulating and soundproofing action. Accordingly, the heat of the main storage chamber 51 that stores the heat radiation source is difficult to be transmitted to the compartment 53, which can contribute to suppressing the temperature rise of the compartment 53. The partition wall 55 may have a structure including an air heat insulating layer 55x.

  According to the present embodiment, as shown in FIG. 15, a metal attachment / detachment panel 56 is attached to the side of the compartment 53 in the housing 50 by a fixture 56 x such as a bolt. When the fixture 56x is removed, the detachable panel 56 is detached from the housing 50 outward. The detachable panel 56 has air permeability, can be detached from and attached to the housing 50, and closes the compartment 53. The desorption panel 56 has a grill 58 that forms an intake port 12i that functions as an outside air introduction port for introducing outside air 700 (air outside the housing 50) that functions as a cathode gas into the inside of the housing 50.

  As shown in FIG. 15, the stack 3 and the humidifier 15 are disposed on the ceiling wall portion 50 u side of the main storage chamber 51 of the housing 50, and are higher than the intermediate position hm in the height direction of the main storage chamber 51. It is arrange | positioned at the upper side and is approaching the ceiling wall part 50u of the housing | casing 50. FIG. The humidifier 15 is disposed on the partition wall 55 side so as to move away from the reformer 2 in the main storage chamber 51.

  As shown in FIG. 15, an air filter portion 66 that functions as a dust removing portion is provided in the compartment 53 of the housing 50 so as to face the partition wall 55. The air filter portion 66 is fixed to the inner surface 56i of the detachable panel 56 by welding or an unillustrated fixture. The air filter unit 66 has a filter function of removing dust contained in the outside air 700 as a cathode gas supplied to the cathode of the stack 3.

  As can be understood from FIG. 15, the cathode gas passage 12 has an intake port 12 i as an outside air inlet formed in the attachment / detachment panel 56 of the housing 50, and an air filter portion 66 communicating with the inlet 12 i as an outside air inlet. A passage 12f for flowing the cathode gas that has passed through the inside of the air filter portion 66 to the branching portion 77k of the duct 77, a passage 12s for conveying the cathode gas from the branching portion 77k toward the inlet 15i of the humidifier 15, and a passage 12s. And a cathode gas pump 13 (cathode gas carrier source) provided in

  As shown in FIG. 15, a duct 77 having a hollow cylindrical shape that forms an air passage 34 that can supply outside air as cathode gas to the cathode of the stack 3 is provided. The duct 77 communicates the back surface 66r side, which is the outlet side of the air filter portion 66, and the portion 68p of the electrical equipment box 68. The electric equipment box 68 includes a box chamber 68a that can be a passage through which air can pass, and an electric equipment 68c that can be a heat radiation source disposed in the box chamber 68a. The electric device 68c includes an inverter that converts the power generated by the fuel cell, a power supply board that is electrically connected to a power supply, and other electric components. The air passage 34 connects the outlet 68m of the electric equipment box 68 and the combustion part 2c.

  As shown in FIG. 15, the case 66t functioning as an outer box of the air filter portion 66 during normal operation such as during operation of the fuel cell system, together with the back plate 66w held on the back surface of the case 66t, opens the partition wall 55. 75 is closed. Therefore, the air filter part 66 can function as an opening / closing member or a lid member that closes the opening 75 in an openable / closable manner. In this state, the inside of the air filter portion 66 communicates with the opening 75 so that the outside air outside the housing 50 can be introduced to the duct 77 side as the cathode gas. Therefore, in the state where the air filter portion 66 is attached in the housing 50 as shown in FIG. 15, the intake port 12 i as the outside air introduction port of the detachable panel 56, the inside of the air filter portion 66, the opening 75, the duct 77. Communicates so that outside air can be sucked into the duct 77 side.

  Therefore, when the air pump 33 (combustion air conveyance source) is driven to rotate, the outside air flows into the intake port 12i as the outside air introduction port of the desorption panel 56, the air filter part 66, the opening 75, the duct 77, and the electric equipment box 68. It is supplied to the combustion part 2c of the reformer 2 through the air passage 34, and is used for combustion in the combustion part 2c. In this case, since the electric device 68c that dissipates heat inside the electric device box 68 is cooled by air and overheating of the electric device 68c is suppressed, it is possible to contribute to improving the durability and extending the life of the electric device 68c. Furthermore, since the air supplied to the combustion part 2c of the reformer 2 can be preheated by heat radiation from the electric equipment 68c of the electric equipment box 68, it is advantageous for improving the combustion efficiency in the combustion part 2c.

  As shown in FIG. 15, an exhaust gas discharge device 2k (product of the present invention) is provided on the ceiling wall 50u (mounting wall) of the housing 50. The exhaust gas combusted in the combustion unit 2c is cooled by the condenser 49 to generate condensed water, and then discharged from the exhaust gas outlet 2k to the outside (upward) of the housing 50. This exhaust gas means the exhaust gas of combustion air combusted in the combustion part 2c, the exhaust gas of combustion fuel, and the exhaust gas after the anode off gas is combusted in the combustion part 2c.

  As shown in FIG. 15, when the cathode gas pump 13 (cathode gas carrier source) is driven to rotate, the air in the duct 77 is supplied to the inlet 15 i of the humidifier 15 via the passage 12 s of the cathode gas passage 12 and is humidified. After being humidified by the vessel 15, it is supplied to the cathode of the stack 3 and used for power generation reaction.

  According to the present embodiment, as shown in FIG. 15, the cathode offgas having a high humidity after the power generation reaction is discharged from the cathode outlet of the stack 3 and then flows into the moisture absorption passage of the humidifier 15. Is discharged into the cathode offgas passage 14 from the outlet 15p. As shown in FIG. 15, the cathode off-gas passage 14 includes a passage 14 f oriented in the vertical direction from the outlet 15 p of the humidifier 15 to the inlet 22 i of the condenser 22, and an arrow L <b> 2 direction from the outlet 22 p of the condenser 22. In other words, a passage 14s is provided along the horizontal direction toward the exhaust gas discharge device 14p on the side surface portion 50m. As can be understood from FIG. 15, the high-humidity cathode offgas discharged from the outlet 15p of the humidifier 15 is cooled by the condenser 22, and the moisture contained in the cathode offgas is condensed as condensed water. The cathode off-gas after generating the condensed water is discharged outward (laterally) from the exhaust gas discharge device 14p (product of the present invention) on the side surface portion 50m of the housing 50.

  According to this embodiment as described above, the cathode gas passage 12 is directed from the inlet 12i of the desorption panel 56 to the inlet 15i of the humidifier 15 through the passage 12f and the passage 12s. Specifically, as shown in FIG. 15, the cathode gas passage 12 is divided into an intake port 12 i provided in the desorption panel 56, an air filter portion 66, a passage 12 f to the branch portion 77 k of the duct 77, and a branch. A passage 12s between the portion 77k and the inlet 15i of the humidifier 15;

  Here, according to the present embodiment, as shown in FIG. 15, the first one-side space 50 y and the second one-side space 50 w through the center line P <b> 1 through the accommodation chamber 50 x (the main accommodation chamber 51 + the compartment 53) of the housing 50. The reformer 2 is arranged in the first one-side space 50y on one side in the housing chamber 50x of the housing 50. That is, the reformer 2 is disposed on one end side in the longitudinal direction (arrow L1 direction) of the housing chamber 50x of the housing 50.

  On the other hand, the intake port 12i of the cathode gas passage 12 and the exhaust gas exhaust device 14p of the cathode off gas passage 14 are the other side of the housing chamber 50x of the housing 50 together with the cathode gas passage 12 and the cathode off gas passage 14. It is arranged in the two-side space 50w. Here, the exhaust gas discharge device 14p is a dedicated discharge port for discharging the cathode off gas after the power generation reaction, and is separated and independent from the exhaust gas discharge device 2k for discharging the exhaust gas after combustion of the anode off gas. As a result, the length of the cathode gas passage 12 is suppressed and shortened. Therefore, the pressure loss of the cathode gas passage 12 is suppressed. Further, the length of the cathode offgas passage 14 is suppressed and shortened. As a result, the pressure loss of the cathode offgas passage 14 is suppressed.

  According to this embodiment, as shown in FIG. 15, the humidifier 15 is moved away from the reformer 2 that can be a heat radiation source so that the stack 3 is disposed between the humidifier 15 and the reformer 2. ing. Thereby, it is suppressed that the reformer 2 which can be a heat radiation source exerts a thermal influence on the humidifying performance of the humidifier 15. In particular, as shown in FIG. 15, the humidifier 15 faces a compartment 53 (having less or no heat radiation source) that is more easily maintained at a lower temperature than the main storage chamber 51. Therefore, it is suppressed that the humidifier 15 becomes high temperature excessively, and humidification performance is maintained favorable.

  As described above, the reformer 2 is separated from the cathode gas passage 12 and the cathode offgas passage 14. Therefore, it is suppressed that the reformer 2 serving as a heat radiation source exerts a thermal influence on the cathode gas in the cathode gas passage 12 and the cathode off gas in the cathode off gas passage 14. Therefore, the thermal expansion of the volume of the cathode gas in the cathode gas passage 12 and the thermal expansion of the volume of the cathode off gas in the cathode off gas passage 14 are suppressed. Therefore, it is advantageous to reduce power loss of the cathode gas pump 13 (cathode gas transfer source) that transfers the cathode gas to the cathode of the stack 3. In this case, the cathode gas pump 13 can be reduced in size.

(Other forms)
The following items are exemplified as embodiments and application modes of the present invention. The fuel cell system is not limited to the piping shown in FIG. According to the embodiment described above, the reformer 2 is disposed in the first one-side space 50 y on one side in the housing chamber 50 x of the housing 50, and the exhaust gas from the intake port 12 i of the cathode gas passage 12 and the cathode off-gas passage 14. The exhaust device 14p is disposed in the second one-side space 50w together with the cathode gas passage 12 and the cathode off-gas passage 14, but the reformer 2 is not limited to this, and the reformer 2 includes the intake port 12i and the cathode off-gas in the cathode gas passage 12. The exhaust gas discharge device 14p of the passage 14 may be disposed in the second one-side space 50w together with the cathode gas passage 12 and the cathode off-gas passage 14.

When the air pump 33 (combustion air conveyance source) is driven to rotate, the air inside the electrical equipment box 68 is supplied to the combustion section 2c of the reformer 2 through the air passage 34 and used for combustion. Not only the case where the air inside the electric equipment box 68 is sucked, it may be sucked from another system and supplied to the combustion unit 2c. In this case, the electric device 68c that dissipates heat inside the electric device box 68 is cooled by air, and overheating of the electric device 68c is suppressed. This contributes to improving the durability and extending the life of the electric device 68c. 12 communicates with a duct 67 connected to an air passage 34 for supplying combustion air, but the cathode gas passage 12 and the air passage 34 may be separate from each other. The housing 50 is in the shape of a square box, but may be cylindrical. Although the inlet 12i is formed in the detachable panel 56, the exhaust gas exhaust device 14p is formed in the side part 50m of the casing 50, but is not limited thereto, but is formed in the other side part of the casing 50. It may be formed on the ceiling wall part 50u or the bottom wall part 50b of the housing 50.

  The above-described pumps 7, 33, 13, and 41 may be cathode gas carrier sources such as the fan 102 and the blower. The partition wall 55 includes the metal plate 55f and the heat insulating layer 55s. However, the partition wall 55 is not limited thereto, and may be only a metal plate or only a heat insulating plate formed of a heat insulating material.

  The duct 77 supplies the combustion air to the combustion unit 2c via the electric equipment box 68. However, the duct 77 supplies the combustion air to the combustion part 2c without using the electric equipment box 68. May be. The compartment 53 is disposed on the end side in the longitudinal direction of the casing 50, but is not limited thereto, and may be on the end side in the width direction of the casing 50.

  According to the above-described embodiment, as shown in FIG. 15, the water generated by the water purifier 28 is supplied to the water tank 25 and then supplied to the reformer 2. The order of the positions of the purifier 28 and the water tank 25 may be changed. In this case, the water stored in the water tank 25 may be purified by the water purifier 28 and then supplied to the reformer 2. In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

The following technical idea can also be grasped from the above description.
(Additional Item 1) An exhaust muffler member provided in a housing for housing a fuel cell of the fuel cell system, having an exhaust port communicating with outside air and an exhaust chamber communicating with the exhaust port, and facing the exhaust muffler member An exhaust gas discharge device for a fuel cell system, comprising: a blow pipe provided in the casing and having an air outlet that blows off exhaust gas generated in the fuel cell system and communicates with the exhaust chamber. Exhaust gas is blown out from the outlet of the outlet pipe communicating with the exhaust chamber.
(Additional Item 2) An exhaust muffler member provided in a housing that accommodates a fuel cell of the fuel cell system, having an exhaust port communicating with outside air, and provided in the housing so as to face the exhaust muffler member, And a blow pipe having a blow-out port for blowing off exhaust gas generated in the fuel cell system, wherein the exhaust port and the blow-out port are directed in different directions (reverse directions). System exhaust gas exhaust device.

  The present invention can be used for, for example, a fuel cell system for stationary use, vehicle use, electric equipment use, electronic equipment use, portable use, and portable use.

It is sectional drawing which shows the state which concerns on Embodiment 1 and assembles | emits an exhaust gas discharge device. It is a top view which concerns on Embodiment 1 and shows the unit goods of the exhaust gas discharge apparatus before an assembly | attachment. It is sectional drawing which concerns on Embodiment 1 and shows the state which assembled | attached the exhaust gas discharge apparatus to the housing | casing. FIG. 7 is a cross-sectional view illustrating a state in which a cross section taken along W4-W in FIG. It is a side view which shows the state which concerns on Embodiment 2 and assembled | attached the exhaust gas discharge apparatus to the housing | casing. It is a top view which concerns on Embodiment 2 and shows the state which assembled | attached the exhaust gas discharge apparatus to the housing | casing. It is sectional drawing which concerns on Embodiment 3 and shows the state which assembled | attached the exhaust gas discharge apparatus to the housing | casing. FIG. 12 is a cross-sectional view showing a cross section taken along W8-W8 in FIG. FIG. 10 is a side view showing a state where the exhaust gas discharge device is assembled to a housing according to the fourth embodiment. It is sectional drawing which concerns on Embodiment 4 and shows the state before attaching an exhaust gas discharge apparatus to a housing | casing. It is a top view which concerns on Embodiment 4 and shows the state which assembled | attached the exhaust gas discharge apparatus to the housing | casing. It is a top view which concerns on Embodiment 5 and shows the state which assembled | attached the exhaust gas discharge apparatus to the housing | casing. It is sectional drawing which concerns on Embodiment 6 and shows the state which assembled | attached the exhaust gas discharge apparatus to the housing | casing. 1 is a system diagram schematically showing a concept of a fuel cell system according to an application mode 1. FIG. It is a longitudinal cross-sectional view which shows the state which concerns on the application form 1 and cut | disconnected the basic structure inside a housing | casing perpendicularly | vertically along a longitudinal direction. It is a longitudinal cross-sectional view which shows the state which concerns on the application form 1 and cut | disconnected the basic structure inside a housing | casing perpendicularly | vertically along the width direction.

Explanation of symbols

  1 is a supply path, 2 is a reformer, 2a is a reforming section, 2c is a combustion section, 3 is a stack, 4 is a fuel raw material source, 9 is a first condenser, 10 is an inlet valve, 12 is a cathode gas path, 13 is a cathode gas pump (cathode gas carrier source), 14 is a cathode off gas passage, 15 is a humidifier, 17 is a bypass valve, 19 is an anode off gas passage, 20 is an outlet valve, 21 is a second condenser, 25 is a water tank, 28 is a water purifier, 50 is a housing, 50x is a storage chamber, 50m is a side surface, 51 is a main storage chamber, 53 is a compartment, 55 is a partition, 56 is a desorption panel, 58 is a grille, and 66 is an air filter unit. , 67 is a duct, 68 is an electrical equipment box, 300 is an exhaust gas exhaust device, 400 is an exhaust muffler member, 401 is an exhaust port, 410 is an exhaust chamber, 412 is a mounting flange, 430 is a unit product, 580 is an exhaust gas discharge pipe Show.

Claims (8)

An exhaust muffler member provided in a housing for accommodating a fuel cell of the fuel cell system, having an exhaust port communicating with outside air and an exhaust chamber communicating with the exhaust port;
An exhaust pipe provided in the casing so as to face the exhaust muffler member, and blowing out exhaust gas generated in the fuel cell system and having a blowout opening communicating with the exhaust chamber;
In the relative display, when the opening area of the outlet of the outlet pipe is 100, the degree of facing polymerization that the exhaust outlet and the outlet face in the direction parallel to the central axis of the outlet is the outlet outlet. The exhaust gas discharge device for a fuel cell system is set to 30 or less of the opening area of the fuel cell system.   2. The exhaust gas exhaust apparatus for a fuel cell system according to claim 1, wherein the exhaust port and the outlet port are directed in opposite directions.   3. The fuel according to claim 1, wherein the central axis of the exhaust port and the central axis of the outlet pipe intersect each other in a cross section passing through the central axis of the outlet pipe along the central axis of the outlet pipe. Exhaust gas discharge device for battery system.   The exhaust gas exhaust device for a fuel cell system according to claim 1, wherein the exhaust muffler member and the outlet pipe are connected to each other.   5. The exhaust gas exhaust device for a fuel cell system according to claim 1, wherein the exhaust muffler member is changeable in direction with respect to the casing. 6.   In one of Claims 1-5, the above-mentioned outlet pipe has a drainage passage, and the above-mentioned drainage passage connects the exhaust chamber of the exhaust muffler member, and the inside of the outlet pipe, An exhaust gas exhausting device for a fuel cell system, wherein water present in the exhaust chamber of the exhaust muffler member is allowed to escape to the inside of the outlet pipe.   In one of Claims 1-6, the said blower outlet of the said blower pipe protrudes in the said exhaust chamber of the said exhaust muffler member, and the lower end of the said blower outlet of the said blower pipe in the height direction is the said The exhaust gas of the fuel cell system is set at a position lower than the lower end of the exhaust port of the exhaust muffler member so that water existing in the exhaust chamber is allowed to escape from the outlet to the inside of the outlet pipe Discharging device. A housing with a containment chamber;
A reformer disposed in the housing chamber of the housing and having a reforming unit that reforms a fuel raw material to generate anode gas, and a combustion unit that heats the reforming unit;
A fuel cell stack disposed in the housing chamber of the housing and having an anode supplied with the anode gas and a cathode supplied with a cathode gas;
An exhaust gas exhaust pipe that is disposed in the housing chamber of the housing and exhausts exhaust gas exhausted from the combustion section or the stack of the reformer toward outside air;
An exhaust gas exhaust device attached to the outer wall surface of the housing and communicating with the exhaust gas exhaust pipe;
8. The fuel cell system according to claim 1, wherein the exhaust gas exhaust device is an exhaust gas exhaust device described in one of claims 1 to 7.

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