JP6549032B2 - Fuel cell device - Google Patents

Description

  The present invention relates to a fuel cell device in which a fuel cell module having a fuel cell is housed in an outer case.

  In recent years, various fuel cell devices capable of obtaining electric power using hydrogen-containing gas (fuel gas) and oxygen-containing gas (usually air) as next-generation energy have been proposed, and typical prior art For example, it describes in patent document 1. The fuel cell device of this prior art includes a fuel cell module in which a fuel cell is stored in a storage container, an accessory for operating the fuel cell module, and an outer case for containing the fuel cell module and the accessory. Prepare.

  In such a fuel cell device, various auxiliary devices are disposed on the bottom plate portion of the outer case for operation of the fuel cell module, etc., and the fuel cell device is The ground installed is cooled by radiation cooling, and the cold heat is transferred to the bottom plate side of the outer case, which may cause failure of various accessories. In the case where the opening is provided below the outer case, small animals such as rainwater and insects enter from the opening and water accumulates on the floor plate, or the small animal causes the failure of the accessory. There is a fear.

Patent No. 4945152

  Therefore, in Patent Document 1 above, a drainage port is proposed in which the small animals are prevented from entering while maintaining the strength, but the structure is complicated, and there is room for improvement in drainage, and it is simple. There is a need for a fuel cell device having a high drainage performance with a simple structure.

The fuel cell device of the present invention comprises an outer case having a side wall portion, a top plate portion, and a bottom plate portion;
A fuel cell module housed in the outer case and having a fuel cell;
A fuel cell device comprising: an auxiliary device accommodated in the outer case and for operating a fuel cell module,
The bottom plate portion is
A first bottom plate member having a first drainage area in which a plurality of first through holes having a predetermined first opening area are formed;
A second bottom plate member having a second drainage area provided below the first bottom plate member and having a plurality of second through holes having a predetermined second opening area smaller than the predetermined first opening area; , And is characterized.

  According to the fuel cell device of the present invention, water generated in the exterior case or water entering from the outside can be easily drained with a simple configuration, and small animals such as insects from the outside, rain water, watering In addition, dust and the like can be suppressed from entering the outer case.

It is a simplified sectional view showing composition of an example of a fuel cell device of this embodiment. It is a perspective view which shows the baseplate part of an exterior case. It is a perspective view which shows the state which removed the 1st bottom plate member of the bottom plate part of the exterior case. It is the perspective view which expanded 1st and 2nd drainage area vicinity of a baseplate part. It is the top view which expanded 1st and 2nd drainage area vicinity of a baseplate part. It is the front view which expanded 1st and 2nd drainage area vicinity of the baseplate part with which the fuel cell apparatus of other embodiment is equipped.

  FIG. 1 is a simplified cross-sectional view showing the configuration of an example of a fuel cell device according to this embodiment, FIG. 2 is a perspective view showing a bottom plate portion of an outer case, and FIG. (1) It is a perspective view which shows the state which removed the baseplate member. The fuel cell device 1 of the present embodiment includes an outer case 5 having a substantially square cylindrical side wall 2, a top plate 3 and a bottom plate 4, and a fuel cell module 6 housed in the outer case 5. And an accessory 7 for operating the fuel cell module 6. Although the side wall portion 2, the top plate portion 3 and the bottom plate portion 4 of the exterior case 5 are made of a punched material of a structural steel plate in this embodiment, the present invention is not limited thereto, and realized by a synthetic resin molded product or fiber reinforced plastic It may be done. In addition, as a fuel cell device of this embodiment, for example, a fuel cell device of a solid polymer type, a solid oxide type or the like can be used.

  The fuel cell module 6 includes, for example, a plurality of solid oxide fuel cells, and a reformer (not shown) that performs steam reforming using raw fuel such as natural gas or kerosene and steam. Power generation is performed by supplying the fuel cell generated with the reformer to the fuel cell and an oxygen-containing gas such as air. In the exterior case 5, a substantially horizontal partition 13 that divides the space in the exterior case 5 into an upper space in which the fuel cell module 6 described above is accommodated and a lower space in which the auxiliary device 7 described above is accommodated. Is provided. In the lower space, for example, the water supply device 8 is accommodated as the accessory 7. The water supply device 8 includes a water treatment device for supplying water to the reformer, a condensed water treatment device, a water supply pipe, and the like.

  The bottom plate portion 4 includes a first bottom plate member 4 a and a second bottom plate member 4 b provided at an interval below the first bottom plate member 4 a. The first bottom plate member 4a is formed of a rectangular plate-like body in a plan view, and for example, in order to control the operation of the accessory 7 near the mounting position of the water supply device 8, near the multiple hot water pipe joints 9. In the vicinity of the control device 10, a plurality of first through holes 1a having first drainage regions S11 to S13 are formed. In addition, the number of 1st drainage regions can be changed suitably.

  The second bottom plate member 4b has second drainage areas S21 to S23 so as to surround each of the first drainage areas S11 to S13 in plan view. Further, in the second drainage area S21 to S23, a plurality of second through holes 11b having a predetermined second opening area A2 (A1> A2) smaller than the predetermined first opening area A1 are formed. In addition, the number of 2nd drainage regions can be suitably changed according to the number of 1st drainage regions.

  In the lower space, as a further accessory 7, the heat exchanger 14 performs heat exchange with the exhaust gas (exhaust heat) generated by the power generation of the fuel cell device 1 and water, and the condensed water generated by the heat exchange is treated And a blower 16 for supplying an oxygen-containing gas (air) to the fuel cell module 6. When the amount of condensed water supplied to the condensed water treatment device 15 is small or when the purity of the condensed water after being treated by the condensed water treatment means is low, water (such as tap water) supplied from the outside is pure. Water may be treated and supplied to the reformer. In this case, a water treatment apparatus may be provided as a means for treating externally supplied water to pure water.

  In the present embodiment, it is assumed that the main surfaces facing above the first and second bottom plate members 4a and 4b are horizontal within a range including the degree of installation error, and the X axis and Y orthogonal to each other on the imaginary horizontal plane Assuming an axis, the first through hole 11a is realized by a cylindrical hole having a diameter D1 penetrating perpendicularly to the main surface of the first bottom plate member 4a. Such a diameter D1 is selected to be, for example, 4 mm to 10 mm in consideration of the arrangement intervals ΔL1x, ΔL1y so that the mechanical strength of the first bottom plate member 4a on which the accessory 7 is mounted is not impaired. Is chosen to be 6 mm.

  The second through hole 11b is realized by a cylindrical hole having a diameter D2 vertically penetrating the main surface of the second bottom plate member 4b. Such an aperture D2 is selected to be, for example, 1 mm to 3 m, preferably 2 mm, in consideration of the arrangement intervals ΔL2x and ΔL2y so as to prevent entry of small animals such as insects.

  FIG. 4 is an enlarged perspective view of the vicinity of the first and second drainage areas S11 and S21 of the bottom plate 4. FIG. 5 is an enlarged plan view of the vicinity of the first and second drainage areas S11 and S21 of the bottom plate 4. It is. Thus, the first drainage areas S11 to S13 and the second drainage areas S21 to S23 do not overlap in the direction perpendicular to the paper surface of FIG. 5, and accordingly, the plurality of first through holes 11a and the plurality of second through holes 11b is provided at a position not overlapping in the vertical direction. That is, in the present embodiment, the second drainage is performed so that the inner peripheral edge 22 of the second drainage area S21 to S23 is located with an interval ΔL10 in the out-of-plane direction from the outer peripheral edge 21 of the first drainage area S11 to S13. Regions S21 to S23 are provided. 4 and 5 show only the first and second drainage areas S11 and S21 in the vicinity of the water supply device 8, but the remaining first and second drainage areas S12 and S13; S22 and S23 are also the same. The first and second drainage regions S11 and S21 formed in the vicinity of the water supply device 8 may be described for convenience of explanation.

  The water which has flowed into at least a part of the plurality of first through holes 11a by the first and second drainage regions S11 and S21 flows down to the non-porous region S24 inside the second drainage region S21, and then the second The air is discharged out of the machine through the through hole 11b. The second through hole 11 b has an opening area smaller than that of the first through hole 11 a (A 1> A 2), so that it is possible to prevent the entry of insects and the like from the outside. Also, even if water splashed back on the ground due to strong wind, water spray or the like comes in contact with the second bottom plate member 4b from below and a part thereof intrudes into the interior from the second through hole 11b, Since it is closed by the non-porous area S24 of the first bottom plate member 4a, water droplets are prevented from invading the lower space beyond the first bottom plate member 4a.

  Further, since the first through holes 11a and the second through holes 11b are formed at shifted positions, the ground is cooled by radiation cooling when the fuel cell device 1 is used in a cold region, and the cold air is directly In addition, it is possible to prevent entry into the lower space, and it is possible to prevent the water supply device 8 from being cooled, greatly reducing the temperature and freezing.

  FIG. 6 is an enlarged front view of the vicinity of the first and second drainage regions of the bottom plate portion provided in the fuel cell device according to another embodiment. In the bottom plate portion 4 of the fuel cell device 1 of the present embodiment, the same reference numerals are attached to the portions corresponding to the above embodiment, and the first bottom plate member 4a is located below the main surface facing upward. The second bottom plate member 4 b has a second drainage area S <b> 21 recessed downward from the main surface facing upward. Further, the remaining first drainage areas S12 and S13 are also recessed downward from the main surface facing the upper side of the first bottom plate member 4a, similarly to the above-described first drainage area S11, and the remaining second drainage areas S12 and S13. The regions S22 and S23 can be recessed downward below the main surface facing above the second bottom plate member 4b, as in the case of the second drainage region S21 described above. The size and depth of the recess can be set as appropriate.

  With such a configuration, water generated in the fuel cell device efficiently flows to the first and second drainage regions S11 to S13 and S21 to S23, and the whole of the first bottom plate member 4a and the second bottom plate member 4b is produced. Spread can be suppressed, and drainage can be efficiently performed to the outside.

  In addition, even if the water accumulated in the first and second drainage areas S11 to S13 and S21 to S23 is pressed by the air flow generated by the blowing of a wind or the like, the first and second drainage areas S11 to S13, It is intercepted by the level difference part which falls from each principal surface of S21-S23, and it can control that the water in the 1st and 2nd drainage field S11-S13, S21-S23 flows out outside, and stays in the machine, Reliable drainage can be achieved with a simple configuration.

  In still another embodiment, the first drainage areas S11 to S13 are on the same plane as the main surface of the first bottom plate member 4a, similarly to the first drainage areas S11 to S13 of the embodiment of FIGS. 1 to 5 described above. Even if the second drainage area S21 to S23 is provided below the main surface of the second bottom plate member 4b, similarly to the second drainage area S21 to S23 in the embodiment of FIG. Good.

  In still another embodiment, the first drainage areas S11 to S13 are formed by being recessed downward from the main surface of the first bottom plate member 4a, similarly to the first drainage areas S11 to S13 of the embodiment of FIG. 6 described above. The second drainage areas S21 to S23 may be formed on the same plane as the main surface of the second bottom plate member 4b, similarly to the second drainage areas S21 to S23 in the embodiment of FIGS. 1 to 5 described above. .

  As described above, according to the fuel cell device of the present embodiment, the opening area A2 of the second through hole 11b of the second bottom plate member 4b provided below the first bottom plate member 4a is the same as that of the first bottom plate member 4a. 1. By making the opening area A1 of the through hole 11a smaller (A1> A2), water generated by condensation or the like in the outer case 5 or water entering from the outside can be made into the second through hole 11b with a simple configuration. It can be made to flow out from the 1st through-hole 11a with a large opening area to the 2nd bottom plate member 4b side in a short time at a large flow rate compared with the above, and it can be made to flow out from the 2nd through-hole 11b to drain. In addition, since the opening area A2 of the second through hole 11b is smaller than the opening area A1 of the first through hole 11a (A1> A2), the configuration is simple, and small animals such as insects, rain water, water sprinkling, dust etc. from the outside It is possible to suppress intrusion into the outer case.

  As mentioned above, although this invention was demonstrated in detail, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the summary of this invention, a various change, improvement, etc. are possible.

DESCRIPTION OF SYMBOLS 1 fuel cell apparatus 2 side wall part 3 top plate part 4 bottom plate part 4a 1st bottom plate member 4b 2nd bottom plate member 5 exterior case 6 fuel cell module 7 auxiliary machine 8 water supply apparatus 9 pipe joint 10 control apparatus 13 partition part S11-S13 First drainage area S21 to S23 Second drainage area

Claims (5)

An exterior case having a side wall portion, a top plate portion, and a bottom plate portion;
A fuel cell module housed in the outer case and having a fuel cell;
A fuel cell device comprising: an auxiliary device accommodated in the outer case and for operating the fuel cell module;
The bottom plate portion is
A first bottom plate member having a first drainage area in which a plurality of first through holes having a predetermined first opening area are formed;
A second bottom plate member having a second drainage area provided below the first bottom plate member and having a plurality of second through holes having a predetermined second opening area smaller than the predetermined first opening area; A fuel cell device comprising:   The fuel cell device according to claim 1, wherein the plurality of first through holes and the plurality of second through holes are formed at positions not overlapping each other in plan view.   The fuel cell device according to claim 1, wherein the second drainage area is provided to surround the first drainage area in a plan view.   The fuel cell device according to any one of claims 1 to 3, wherein the second drainage area of the second bottom plate member is recessed downward.   The fuel cell device according to any one of claims 1 to 4, wherein the first drainage area of the first bottom plate member is formed to be recessed downward.

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