JP2018160326A - Fuel cell system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel cell system that can be arranged depending on an installation place and that can improve maintainability.SOLUTION: A fuel cell system comprises: a thermal storage unit-integrated fuel cell unit 12 formed in such a rectangular parallelepiped shape that a width dimension is longer than a depth dimension, and on whose lateral face located in a width direction a fuel cell side maintenance surface 12b is set; and a hot-water supplier unit 14 connected with the fuel cell unit 12 via piping, and formed in such a rectangular parallelepiped shape that a width dimension is longer than a depth dimension, and on whose lateral face located in a width direction a hot-water supplier side maintenance surface 18b is set. A depth dimension of one of the fuel cell unit 12 and the hot-water supplier unit 14 is set to be shorter than that of the other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fuel cell system.

  Conventionally, a fuel cell system that generates power using a chemical reaction between hydrogen and oxygen is known (see, for example, Patent Document 1).

  This fuel cell system includes a fuel cell unit and a heat storage unit. The fuel cell unit and the heat storage unit are arranged so that the discharge direction of the reformer exhaust gas from the reformer of the fuel cell unit and the discharge direction of the heating device exhaust gas from the heating device of the heat storage unit face each other, Both are fixed to the gantry and integrated.

  The fuel cell unit and the heat storage unit are arranged with a predetermined separation distance, and the separation distance is a distance that can secure an exhaust space and a maintenance space.

JP 2008-262849 A

  However, in such a fuel cell system, since the fuel cell unit and the heat storage unit are integrated by a mount, the degree of freedom of arrangement of the fuel cell unit and the heat storage unit is low.

  The depth dimensions of the fuel cell unit and the heat storage unit of the fuel cell system are substantially the same. For this reason, if the gap between the fuel cell system integrated with the gantry and the wall of the installed passage side edge is narrow, there is a problem that the fuel cell unit and the heat storage unit cannot enter and maintenance is not possible. It was.

  An object of the present invention is to provide a fuel cell system that can be arranged according to the installation location and can improve maintenance inspection workability (hereinafter referred to as maintenance performance).

  In the first aspect, a heat storage unit-integrated fuel cell unit formed in a rectangular parallelepiped shape having a width dimension longer than the depth dimension and having a fuel cell side maintenance surface set on a side surface positioned in the width direction, and a pipe connected to the fuel cell unit A water heater unit that is formed in a rectangular parallelepiped shape whose width dimension is longer than the depth dimension and has a hot water heater side maintenance surface set on a side surface positioned in the width direction, the fuel cell unit or the hot water supply The depth dimension of one unit of the container unit is set shorter than the depth dimension of the other unit.

  That is, the heat storage unit-integrated fuel cell unit and the water heater unit are not fixed and are disposed at arbitrary positions. For this reason, as compared with the case where the fuel cell unit and the water heater unit are integrated and positioned by the gantry, the degree of freedom of arrangement is improved and the carrying into the installation place is facilitated.

  As an arrangement example, when the fuel cell unit and the water heater unit are arranged in parallel in the length direction of the passage having a narrow width dimension, the fuel cell side maintenance surface is positioned on one side in the length direction of the passage. Place the unit. Then, the water heater unit is arranged on the other side of the fuel cell unit, and the water heater unit is arranged so that the hot water heater side maintenance surface is located on the other side in the length direction.

  In such an arrangement example, the fuel cell unit can be maintained from the fuel cell side maintenance surface by accessing from one side of the passage. Further, by accessing from the other side of the passage, the hot water supply unit can be maintained from the hot water supply side maintenance surface.

  As another arrangement example, when installing in a passage where one side is closed, one unit having a long depth dimension is arranged on one side of the passage, and the maintenance surface faces the other side. And the other unit with a short depth dimension is installed in the other side of a channel | path.

  In such an arrangement example, the space between the other unit and the passage side edge can be widened, and an access space can be secured. For this reason, one unit can also perform maintenance by accessing from the other side of the passage.

  At this time, the maintenance surface of the other unit may be directed to either the one side or the other side. However, if the maintenance surface of the other unit is directed to one side, the space between both units is used. Thus, maintenance of both units can be performed.

  In the second aspect, the pipe extends from the fuel cell side maintenance surface side of the fuel cell unit.

  That is, when the piping extends from a surface different from the maintenance surface, it is necessary to secure a wiring space on the surface side where the piping extends while securing a work space on the maintenance surface side.

  However, in the fuel cell unit, piping extends from the fuel cell side maintenance surface side, and the maintenance work space and the wiring space are in the same direction. For this reason, the freedom degree of arrangement | positioning can be raised compared with the case where work space and wiring space must be ensured in a different direction.

  Further, if the maintenance side can be accessed, internal maintenance and inspection and replacement of piping can be performed.

  In the third aspect, the fuel cell unit is provided with a discharge part for discharging exhaust gas from a built-in fuel cell module on the maintenance side of the fuel cell side.

  That is, when the discharge unit is provided on a surface different from the maintenance surface, it is necessary to secure an exhaust space on the discharge unit side while securing a work space on the maintenance surface side.

  However, in the fuel cell unit, the discharge portion is provided on the fuel cell side maintenance surface side, and the work space for maintenance and the exhaust space are in the same direction. For this reason, the freedom degree of arrangement | positioning can be raised compared with the case where work space and exhaust space must be ensured in a different direction.

  Further, if the maintenance side can be accessed, internal maintenance and inspection and cleaning of the discharge unit can be performed.

  In the fuel cell system according to the first aspect, it is possible to arrange the fuel cell system according to the installation location, and to improve maintainability.

1 is a perspective view showing a fuel cell system according to an embodiment of the present invention. It is a block diagram which shows the fuel cell system of the embodiment. It is a top view which shows the example of 1st arrangement | positioning of the fuel cell system of the embodiment. It is a top view which shows the 2nd example of arrangement | positioning of the fuel cell system of the embodiment.

  Hereinafter, the fuel cell system according to the present embodiment will be described with reference to FIGS.

  As shown in FIG. 1, the fuel cell system 10 includes a fuel cell unit 12 integrated with a heat storage unit that generates power using fuel gas and water, and clean water heated by the fuel cell unit 12 at a target temperature. And a water heater unit 14 for heating up to.

  The casing 12a of the fuel cell unit 12 is formed in a rectangular parallelepiped shape whose width dimension is longer than the depth dimension. The width dimension from the left side surface 12e to the right side surface 12f located in the longitudinal direction NH is W1, the height dimension from the bottom surface 12g to the top surface 12h is H1, and the depth dimension from the front surface 12d to the rear surface 12c is located in the short side direction TH. Is D1, the width dimension W1 is longer than the depth dimension D1 (D1 <W1).

  In addition, the front surface 12d and the back surface 12c of the fuel cell unit 12 are names given for convenience of description, and do not limit the difference in the design of the surface or the orientation in the installed state. Further, the left side surface 12e and the right side surface 12f of the fuel cell unit 12 are also names given for convenience of explanation, and do not limit the difference in design of the surface or the direction in the installed state.

  The right side surface 12f of the casing 12a constitutes a fuel cell side maintenance surface 12b. Here, the maintenance surface refers to a surface that is partially or wholly opened during maintenance inspection. Examples of the fuel cell-side maintenance surface 12b include a door structure fixed to the frame via a hinge and a removable panel structure whose peripheral portion is fixed with screws. Thereby, maintenance (maintenance inspection) inside the fuel cell unit 12 can be performed by opening the fuel cell side maintenance surface 12b.

  The fuel cell side maintenance surface 12b is provided with an exhaust port 13 which is an example of an exhaust part. Further, the fuel cell side maintenance surface 12b is provided with a piping / wiring section 12i for connecting piping and wiring so that piping and wiring connected to the fuel cell unit 12 extend. It is configured. Such maintenance surfaces may additionally be set, for example, on the top surface 12h, the back surface 12c, and the front surface 12d.

The water heater unit 14 is formed in a rectangular parallelepiped shape whose width dimension is longer than the depth dimension, and includes a lower component part 16 constituting the lower side and a water heater body 18 constituting the upper side. An example of the lower component 16 is a stationary table.

  Here, although this embodiment demonstrates the case where the lower water heater main body 18 is installed in the lower part of the water heater main body 18, and the lower water heater main body 18 is installed, it is not limited to this. For example, in the case of a wall-hanging type in which the water heater main body 18 is installed on a building wall, the lower component 16 such as a table is not required.

  The casing 14a of the water heater unit 14 composed of the lower component 16 and the water heater body 18 has a width dimension W2 from the left side surface 14e to the right side surface 14f located in the lateral width direction, and a height from the bottom surface 14g to the top surface 14h. When the dimension is H2, and the depth dimension from the front surface 14d to the back surface 14c is D2, the width dimension W2 is longer than the depth dimension D2 (D2 <W2).

  In addition, the front surface 14d and the back surface 14c of the water heater unit 14 are names given for convenience of description, and do not limit the difference in the design of the surface or the orientation in the installed state. Moreover, the left side surface 14e and the right side surface 14f of the water heater unit 14 are also names given for convenience of explanation, and do not limit the difference in the design of the surface or the direction in the installed state.

  The right side surface of the casing 18a of the water heater body 18 (upper part of the right side surface 14f of the water heater unit 14) constitutes a water heater side maintenance surface 18b having an exhaust port, and the water heater side maintenance surface 18b is, for example, Examples thereof include a door structure fixed to the frame via a hinge and a removable panel structure whose peripheral portion is fixed with screws. Thereby, the maintenance inside the water heater main body 18 can be performed by opening the water heater side maintenance surface 18b.

  In addition, the right side surface of the casing 16a of the lower component 16 (the lower side of the right side surface 14f of the water heater unit 14) also constitutes a maintenance surface 16b, for example, and this maintenance surface 16b is connected to the frame via a hinge, for example. Examples include a fixed door structure and a removable panel structure in which the peripheral edge is fixed with screws. Thereby, maintenance of piping etc. which were connected to water heater main body 18 can be performed by opening maintenance surface 16b, for example.

  The depth dimension D2 of the water heater unit 14 is set to be shorter than the depth dimension D1 of the fuel cell unit 12. Specifically, the depth dimension D1 is set to 350 mm, and the depth dimension D2 is set to 250 mm. Here, as the water heater unit 14, standard types, slim types, and compact types having different external dimensions are prepared, and any type of water heater unit 14 may be used.

  As shown in FIG. 2, the fuel cell unit 12 of the fuel cell system 10 includes a fuel cell module 20 that generates power. The fuel cell module 20 is connected to a gas joint 22 via a gas supply path 21, and a gas pipe 24 is connected to the gas joint 22. From the gas pipe 24, a city gas mainly composed of methane, which is an example of a hydrocarbon raw material, or a liquefied petroleum gas mainly composed of propane / butane is supplied as a fuel. A desulfurization unit 26 is provided in the gas supply path 21, and sulfur and sulfur compounds contained in the supplied gas are removed by the desulfurization unit 26 and supplied to the fuel cell module 20. Note that FIG. 2 shows an example in which city gas is used.

  The fuel cell module 20 is connected to a reformed water tank 32 via a reformed water inflow passage 30 having a supply pump 28, and the fuel cell module 20 includes a modified water stored in the reformed water tank 32. Quality water is supplied by the supply pump 28. The fuel cell module 20 includes a reformer (not shown) that generates hydrogen and the like by reforming a city gas or liquefied petroleum gas and reformed water.

  The fuel cell module 20 includes a power generation unit (not shown) that generates power using hydrogen generated by the reformer and oxygen in the air sent by the blower 20a. The DC power from the power generation unit of the fuel cell module 20 is converted into AC power by the inverter circuit 38 and then supplied to the outside through the power cord 92 connected to the connection terminal 40.

  The fuel cell module 20 is connected to a discharge path 34 for discharging exhaust gas generated when gas is used for reforming or power generation. An exhaust heat exchanger 36 is provided in the discharge path 34, and the downstream side of the exhaust heat exchanger 36 is connected to the reforming water tank 32. The combustion exhaust gas from the fuel cell module 20 is cooled by the exhaust heat exchanger 36, and the contained water vapor is condensed. Thus, the combustion exhaust gas is divided into a liquid and a gas, and the liquid is sent to the reforming water tank 32 and reused as the reforming water. Further, as shown in FIG. 1, the gas is exhausted from the exhaust port 13 of the fuel cell side maintenance surface 12b.

  A supply path 42 is connected to the exhaust heat exchanger 36. The supply passage 42 is provided with a heat recovery pump 44 and a radiator 46, and the supply passage 42 is connected to a hot water storage tank 48 on the upstream side of the radiator 46. A heat transfer medium 50 is stored in the hot water storage tank 48, and water is used as an example of the heat transfer medium 50.

  The supply path 42 is connected to the lower part of the hot water storage tank 48, and the heat transfer medium 50 stored in the lower part of the hot water storage tank 48 is preferentially sent to the exhaust heat exchanger 36. The heat transfer medium 50 supplied from the hot water storage tank 48 to the supply path 42 is cooled by the radiator 46 and then sent to the exhaust heat exchanger 36 by the heat recovery pump 44. The radiator 46 includes a radiator fan (not shown), and operates the fan motor as necessary, such as when the supplied heat transfer medium 50 is hot.

  A discharge path 52 is connected to the exhaust heat exchanger 36, and the heat transfer medium 50 that has passed through the exhaust heat exchanger 36 is returned to the hot water storage tank 48 via the discharge path 52. The discharge path 52 is connected to the upper part of the hot water storage tank 48. The heat of the combustion exhaust gas from the fuel cell module 20 is transferred to the heat transfer medium 50 by the exhaust heat exchanger 36, and the heat transfer medium 50 heated by this heat is returned to the upper part of the hot water storage tank 48. The exhaust heat exchanger 36, the hot water storage tank 48 and the like constitute a heat storage unit.

  The heat transfer medium 50 stored in the hot water storage tank 48 is returned to the hot water storage tank 48 via a circulation path 58 having a water heat exchanger 54 and a heating pump 56. The heat pump 56 operates when heating the clean water with the heat transfer medium 50 of the hot water storage tank 48.

  The upstream side of the circulation path 58 is connected to the upper part of the hot water storage tank 48, and the heat transfer medium 50 stored in the upper part of the hot water storage tank 48 is preferentially supplied to the hot water heat exchanger 54. The downstream side of the circulation path 58 is connected to the lower part of the hot water storage tank 48, and the heat transfer medium 50 that has been deprived of heat by the hot water heat exchanger 54 is returned to the lower side of the hot water storage tank 48.

  An inflow path 60 having an inflow side branch point 60 a is connected to the water heat exchanger 54. The inflow path 60 is connected to the inlet side pipe joint 62. The inlet side pipe joint 62 is connected to a water supply pipe 64 of, for example, a water pipe, and clean water is supplied to the inflow path 60.

  An outflow channel 66 is connected to the water heat exchanger 54. The outflow channel 66 is provided with an outflow side branch point 66a, and a supplemental water channel 70 having a supplementary water valve 68 is connected to the outflow side branch point 66a. The supplementary water passage 70 is connected to the upper part of the hot water storage tank 48, and by opening the supplementary water valve 68, the upper water from the upper water heat exchanger 54 is supplied from the upper part of the hot water storage tank 48 as the heat transfer medium 50. be able to.

  A mixing valve 72 is provided downstream of the outflow path 66 on the outflow side branch point 66a. The mixing valve 72 is connected to the inflow side branch point 60 a via the bypass path 74. The mixing valve 72 is a valve that mixes the clean water from the inflow channel 60 and the clean water from the clean water heat exchanger 54, and for example, from the inflow channel 60 so that the outflow temperature becomes a predetermined set temperature. The mixing ratio of clean water and clean water from the clean water heat exchanger 54 is adjusted.

  An outlet joint 76 is connected downstream of the mixing valve 72 in the outflow passage 66, and the outlet joint 76 is connected to a water inlet joint 80 of the water heater unit 14 via a hot water pipe 78.

  A gas pipe 24 is connected to the gas joint 82 of the water heater unit 14, and liquefied petroleum gas mainly containing city gas or propane / butane is supplied to the water heater unit 14 from the gas pipe 24. A hot water supply pipe 86 is connected to the hot water supply joint 84 of the water heater unit 14. This water heater unit 14 burns liquefied petroleum gas whose main component is city gas or propane / butane, thereby heating the water supplied from the water inlet joint 80 to a temperature set by a remote controller (not shown). It is supplied by a hot water supply pipe 86.

  In the present embodiment, the case where the gas pipe 24 from the fuel cell unit 12 and the gas pipe 24 from the water heater unit 14 are connected to each other and connected to the gas supply source has been described. However, the present invention is not limited to this. is not. The gas pipe 24 from the fuel cell unit 12 and the gas pipe 24 from the water heater unit 14 may be independently connected to a gas supply source.

(First arrangement example)
FIG. 3 is a diagram showing a first arrangement example of the fuel cell system 10, in which the fuel cell system 10 is installed in a passage 90 extending along an adjacent land boundary line (other side edge 90 b of the passage 90 described later). The state is shown.

  In this passage 90, the fuel cell unit 12 is installed on one I side in the length direction N of the passage 90, and the fuel cell unit 12 is arranged so that the fuel cell side maintenance surface 12b is located on one I side. Has been. The fuel cell unit 12 is disposed such that the front surface 12d of the fuel cell unit 12 is located on the side edge 90a side of the building side 110. In FIG. 3, in order to clearly illustrate the piping and wiring routed between the fuel cell unit 12 and the one side edge 90 a of the passage 90, the one side edge 90 a of the fuel cell unit 12 and the passage 90 The interval is displayed wider.

  Further, in the present embodiment, the case where the fuel cell unit 12 is disposed near the one side edge 90a of the passage 90 has been described as an example. However, the present invention is not limited to this, and the fuel cell unit 12 is disposed in the passage 90. You may arrange | position near the other side edge 90b. Further, the front surface 12d of the fuel cell unit 12 is a name given for convenience as described above, and does not limit the difference in the design of the surface or the orientation in the installed state.

  Further, on the other side T in the length direction N of the passage 90 from the fuel cell unit 12, a water heater unit 14 is installed, and a water heater side maintenance surface 18 b of the water heater body 18 and a maintenance surface of the lower component 16. It arrange | positions so that 16b may be located in the other T side (refer FIG. 1). As an example, this water heater unit 14 is also arranged near the one side edge 90a of the passage 90 on the building side 110 in the passage width direction TW, and the back surface 14c of the water heater unit 14 is located on the one side edge 90a side. Has been placed.

  In the present embodiment, the case where the water heater unit 14 is disposed near the one side edge 90 a of the passage 90 has been described as an example. However, the present invention is not limited thereto, and the water heater unit 14 is disposed on the other side of the passage 90. You may arrange | position near the edge 90b. Moreover, the back surface 14c of the water heater unit 14 is a name given for convenience as described above, and does not limit the difference in the design of the surface or the orientation in the installed state.

  From the fuel cell side maintenance surface 12b side of the fuel cell unit 12, a gas pipe 24, a hot water discharge pipe 78, and a water supply pipe 64 extend. Each pipe 24, 64, 78 passes between the front surface 12 d of the fuel cell unit 12 and one side edge 90 a of the passage 90 adjacent to the fuel cell unit 12, and is routed along the one side edge 90 a. The water supply pipe 64 is connected to a water pipe, and the gas pipe 24 is connected to the water heater unit 14 and to the gas main pipe. Further, the hot water outlet pipe 78 is connected to the hot water supply unit 14.

  From the fuel cell side maintenance surface 12b side of the fuel cell unit 12, a power cord 92 having a power supply line for supplying power to the fuel cell unit 12 and a supply line for supplying power generated by the fuel cell unit 12 extends. . The power supply line and the supply line may be shared by the same line. Further, from the fuel cell-side maintenance surface 12b, for example, a current monitoring line, a remote control line, a power generation outlet during a power failure, a power supply line connected to the water heater unit 14, and the like may be extended.

  The power cord 92 passes between the front surface 12d of the fuel cell unit 12 and the one side edge 90a of the passage 90 adjacent to the fuel cell unit 12, and is routed along the one side edge 90a. The power cord 92 is connected to a switchboard 94 provided on the side edge 90 a side of the passage 90, and is connected to a commercial power supply via the switchboard 94.

  In the present embodiment, the case where the switchboard 94 is provided between the fuel cell unit 12 and the water heater unit 14 has been described as an example, but the present invention is not limited to this. If the operator can access and perform maintenance, for example, one side of the fuel cell unit 12, the back side of the fuel cell unit 12, the back side of the water heater body 18, and the other side from the water heater body 18. It may be provided on the T side.

  A hot water supply pipe 86 extends from the back surface 14 c side from the water heater unit 14, and the hot water supply pipe 86 is routed to a location where hot water is used in the building 110. Further, a power cord 96 extends from the back surface 14c side from the water heater unit 14, and the power cord 96 is connected to a commercial power source. The power cord 96 may be connected to the fuel cell unit 12 instead of the commercial power source.

  Here, the minimum distance from the adjacent land boundary line that forms the other side edge 90b of the passage 90 to the building 110 that forms the one side edge 90a of the passage 90 defines the separation distance from the adjacent land boundary line to the outer wall 110a of the building 110. It is stipulated by the law (restrictions on buildings near the boundary: Article 234 of the Civil Code).

  The adjacent land boundary line constituting the other side edge 90b of the passage 90 indicates a boundary line between adjacent sites, and the one side edge 90a of the passage 90 indicates a boundary with the outer wall 110a of the building 110. And the passage 90 shows the elongate area | region (for example, 500 mm-730 mm) in the length direction N formed along the building 110 between the adjacent boundary line and the outer wall 110a of the building 110.

  The minimum width of the passage width TW0 of the passage 90 is defined as the minimum distance by the “restriction of the building near the boundary”, and a space of a separation distance R1 that can be routed between the fuel cell unit 12 and one side edge 90a of the passage 90. The depth dimension D1 of the fuel cell unit 12 is set so that the first space 100 having the first passage width TW1 can be formed between the fuel cell unit 12 and the other side edge 90b of the passage 90 even when the fuel cell unit 12 is secured.

  On the other hand, the depth dimension D2 of the water heater unit 14 is set shorter than the depth dimension D1 of the fuel cell unit 12. Even in the above-described passage 90 having the passage width TW0, even if a space R2 that can be routed between the water heater unit 14 and the one side edge 90a of the passage 90 is secured, the water heater unit 14 and the passage 90 are provided. The depth dimension D2 of the water heater unit 14 is set so that the second space 102 having the second passage width TW2 wider than the first passage width TW1 can be formed between the other side edge 90b.

(Second arrangement example)
FIG. 4 is a diagram showing a second arrangement example of the fuel cell system 10, in which the fuel cell system 10 is installed in a passage 90 extending along an adjacent land boundary line (other side edge 90 b of the passage 90 described later). The state is shown. The passage 90 is configured by a narrow path in which one side I in the length direction N is closed.

  In this passage 90, the fuel cell unit 12 is installed on one I side in the length direction N, and the fuel cell side maintenance surface 12b is arranged on the other T side in the length direction N. . The fuel cell unit 12 is disposed closer to the one side edge 90a of the passage 90 in the passage width direction TW, and the rear surface 12c of the fuel cell unit 12 is disposed on the one side edge 90a side.

  A water heater unit 14 is installed on the other T side in the length direction N of the passage 90 from the fuel cell unit 12. Thus, the fuel cell side maintenance surface 12b of the fuel cell unit 12 is configured to be positioned on the hot water heater unit 14 side.

  The water heater unit 14 is arranged so that the water heater side maintenance surface 18b of the water heater body 18 and the maintenance surface 16b of the lower component 16 are located on the other T side (see FIG. 1). This water heater unit 14 is also arranged near one side edge 90a of the passage 90 in the passage width direction TW, and the back surface 14c of the water heater unit 14 is arranged on the one side edge 90a side.

  From the fuel cell side maintenance surface 12b side of the fuel cell unit 12, a gas pipe 24, a hot water discharge pipe 78, and a water supply pipe 64 extend. Each of the tubes 24, 64, and 78 extends from the side edge 90 a side of the passage 90 on the right side surface 12 f of the fuel cell unit 12, and is routed along the side edge 90 a of the passage 90.

  The water supply pipe 64 is connected to a water pipe, and the gas pipe 24 is connected to the left side 14e of the water heater unit 14 and to the gas main pipe. Further, the hot water discharge pipe 78 is connected to the left side surface 14 e of the water heater unit 14.

  From the fuel cell side maintenance surface 12b side of the fuel cell unit 12, a power cord 92 having a power supply line for supplying power to the fuel cell unit 12 and a supply line for supplying power generated by the fuel cell unit 12 extends. . The power cord 92 extends from the side edge 90 a side of the passage 90, and is routed along the side edge 90 a of the passage 90. The power cord 92 is connected to a switchboard 94 provided on the side edge 90 a side of the passage 90, and is connected to a commercial power supply via the switchboard 94.

  A hot water supply pipe 86 extends from the back surface 14c side from the water heater unit 14, and the hot water supply pipe 86 is routed to a hot water supply location where hot water is used. Further, from the water heater unit 14, a power cord 96 (not shown in FIG. 2) extends from the back surface 14c side, and the power cord 96 is connected to a commercial power source.

  Here, as described above, the minimum distance between the adjacent boundary line constituting the other side edge 90b of the passage 90 and the building 110 constituting the one side edge 90a of the passage 90 is determined by law. Even if the passage width TW0 of the passage 90 is set to the minimum distance according to this law and the space of the separation distance R1, which is the installation condition, is secured between the fuel cell unit 12 and one side edge 90a of the passage 90, the fuel cell unit 12 A depth dimension D1 of the fuel cell unit 12 is set so that a first space 100 having a first passage width TW1 can be formed between the other side edge 90b of the passage 90.

  On the other hand, the depth dimension D2 of the water heater unit 14 is set shorter than the depth dimension D1 of the fuel cell unit 12. Even in the above-described passage 90 having the passage width TW0, even if the space of the separation distance R2 as the installation condition is ensured between the water heater unit 14 and the one side edge 90a of the passage 90, the water heater unit 14 and the passage 90 are provided. The depth dimension D2 of the water heater unit 14 is set so that the second space 102 having the second passage width TW2 wider than the first passage width TW1 can be formed between the other side edge 90b.

  Next, the operation and effect of this embodiment will be described.

  In the present embodiment, the fuel cell unit 12 and the water heater unit 14 are not fixed and can be arranged at arbitrary positions. For this reason, compared with the case where the fuel cell unit 12 and the water heater unit 14 are integrated and positioned by a gantry, the degree of freedom of arrangement is improved, and the units 12 and 14 can be easily carried into the installation location. Become.

  Further, as shown in the first arrangement example of FIG. 3, when the fuel cell unit 12 and the water heater unit 14 are arranged in parallel in the length direction N of the passage 90 having a narrow width dimension, the length direction N of the passage 90 The fuel cell unit 12 is arranged so that the fuel cell side maintenance surface 12b is positioned on one I side. Then, the water heater unit 14 is disposed on the other T side of the fuel cell unit 12, and the water heater side maintenance surface 18b of the water heater body 18 and the maintenance surface 16b of the lower component 16 are positioned on the other T side. The water heater unit 14 is arranged in

  Thereby, the fuel cell unit 12 can be maintained from the fuel cell side maintenance surface 12b by approaching the fuel cell unit 12 from the I side of the passage 90. Further, by approaching the water heater unit 14 from the other T side of the passage 90, the water heater unit 14 can be maintained from the water heater side maintenance surface 18b.

  Therefore, both units 12 and 14 are arranged in a narrow passage 90 that is difficult to access between the fuel cell unit 12 and the water heater unit 14 so that the fuel cell side maintenance surface 12b and the water heater side maintenance surface 18b face each other. Compared to the case, the maintenance of the fuel cell unit 12 and the water heater unit 14 is facilitated.

  At this time, the pipe extending from the fuel cell side maintenance surface 12b side of the fuel cell unit 12 is routed between the fuel cell unit 12 and one side edge 90a of the passage 90 adjacent to the fuel cell unit 12, The gas pipe 24 and the hot water discharge pipe 78 are connected to the water heater unit 14.

  For this reason, since piping and wiring can be routed between the fuel cell unit 12 and the building 110, the external appearance quality in the installed state compared to the case where the piping and wiring are routed on the front side of the fuel cell unit 12. Can be increased. In addition, it is possible to suppress problems such as stepping on piping and wiring when passing through the passage 90.

  Further, as shown in the second arrangement example of FIG. 4, when the fuel cell unit 12 and the water heater unit 14 are juxtaposed in the length direction N of the passage 90 whose one I side is closed, the depth dimension D1 is long. The fuel cell unit 12 is disposed on one side I of the passage 90. At this time, the fuel cell unit 12 is installed so that the fuel cell side maintenance surface 12b faces the other T side. Then, the water heater unit 14 having a short depth dimension D <b> 2 is installed on the other T side of the passage 90.

  Thus, the second passage width TW2 of the second space 102 between the water heater unit 14 and the other side edge 90b of the passage 90 is set to the first space between the fuel cell unit 12 and the other side edge 90b of the passage 90. It can be made wider than 100 first passage width TW1. For this reason, even if one I side of the passage 90 is closed and the fuel cell unit 12 cannot be approached from the one I side, the access space to the fuel cell side maintenance surface 12b by the second space 102 of the second passage width TW2. Can be secured. Therefore, the hot water heater unit 14 can also be maintained by accessing from the other T side of the passage 90.

  At this time, the hot water heater side maintenance surface 18b and the maintenance surface 16b of the hot water heater unit 14 may be directed to either the I side or the other T side. However, if the hot water heater side maintenance surface 18b and the maintenance surface 16b of the water heater unit 14 are arranged toward the I side, maintenance of both units 12 and 14 is performed using the space between the both units 12 and 14. be able to.

  Thus, the fuel cell unit 12 and the water heater unit 14 can be arranged according to the installation location, and the maintainability of both the units 12 and 14 can be improved.

  At this time, the fuel cell side maintenance surface 12 b of the fuel cell unit 12 is set on the length direction N side of the passage 90. For this reason, compared with the case where the fuel cell side maintenance surface 12b is set in the passage width direction TW of the passage 90, maintenance can be performed without being restricted by the passage width TW0.

  Further, from the fuel cell unit 12, the gas pipe 24, the water supply pipe 64, the hot water discharge pipe 78, and the like extend from the fuel cell side maintenance surface 12 b side located on the water heater unit 14 side.

  For this reason, compared with the case where each pipe | tube 24,64,78 extends from the hot water supply unit 14 and the opposite side, a wiring operation becomes easy. Moreover, since the piping etc. which are routed can be shortened, cost reduction can be achieved.

  Here, when the piping or the like extends from a surface different from the maintenance surface, it is necessary to secure a wiring space on the surface side where the piping or the like extends while securing a work space on the maintenance surface side.

  However, in the fuel cell unit 12 of the present embodiment, piping and the like extend from the fuel cell side maintenance surface 12b side, and the maintenance work space and the routing space are in the same direction. For this reason, the freedom degree of arrangement | positioning can be raised compared with the case where work space and wiring space must be ensured in a different direction.

  Further, if the fuel cell side maintenance surface 12b side of the fuel cell unit 12 can be accessed, internal maintenance, inspection and replacement of piping, etc. can be performed.

  Further, the fuel cell unit 12 is provided with an exhaust port 13 on the fuel cell side maintenance surface 12b side, which is an example of a discharge unit that discharges exhaust from the built-in fuel cell module 20.

  Here, when the exhaust port 13 is provided on a surface different from the fuel cell side maintenance surface 12b, it is necessary to secure an exhaust space on the exhaust port 13 side while securing a working space on the fuel cell side maintenance surface 12b.

  However, in this fuel cell unit 12, the exhaust port 13 is provided on the fuel cell side maintenance surface 12b side, and the maintenance work space and the exhaust space are in the same direction. For this reason, the freedom degree of arrangement | positioning can be raised compared with the case where work space and exhaust space must be ensured in a different direction.

  Moreover, if the fuel cell side maintenance surface 12b side can be accessed, internal maintenance and inspection and cleaning of the exhaust port 13 can be performed.

  In the second arrangement example, the case where the first I side is installed in the closed passage 90 has been described as an example, but the first I and the other T side may be installed in the open passage 90. In this case, even if the first passage width TW1 of the first space 100 between the fuel cell unit 12 and the other side edge 90b of the passage 90 is narrow and cannot enter, the other side of the water heater unit 14 and the passage 90 is provided. The second passage width TW2 of the second space 102 between the edge 90b can be increased. Thereby, since the second space 102 can be used as an access space, it is possible to obtain the same effects as described above.

  Moreover, in this embodiment, the case where the right side surface of the water heater main body 18 in the water heater unit 14 constitutes the water heater side maintenance surface 18b and the right side surface of the lower component part 16 constitutes the maintenance surface 16b is taken as an example. Although described, the present invention is not limited to this.

  For example, the left side surface of the water heater main body 18 in the water heater unit 14 may be a hot water heater side maintenance surface, and the left side surface of the lower component 16 may be a maintenance surface. In this case, maintenance of the fuel cell unit 12 and the water heater unit 14 can be performed in the space between the fuel cell unit 12 and the water heater unit 14. Further, the hot water heater side maintenance surface 18b of the hot water heater body 18 and the maintenance surface 16b of the lower component 16 may be provided in opposite directions.

  Moreover, in this embodiment, although the depth dimension D2 of the water heater unit 14 was set shorter than the depth dimension D1 of the fuel cell unit 12, it is not limited to this. For example, the depth dimension D1 of the fuel cell unit 12 may be set shorter than the depth dimension D2 of the water heater unit 14. In this case, in the second arrangement example, the arrangement of the fuel cell unit 12 and the water heater unit 14 is exchanged.

  In the present embodiment, only the right side surface of the fuel cell unit 12 is the fuel cell side maintenance surface 12b. However, the present invention is not limited to this.

  For example, a maintenance surface may be provided on the front surface 12d and the top surface 12h of the fuel cell unit 12 in addition to the fuel cell-side maintenance surface 12b.

  Moreover, although each piping etc. demonstrated in the case where it wired between the fuel cell unit 12 and the building 110, it is not limited to this. For example, it may be routed in a passage on the opposite side of the fuel cell unit 12 and the building 110, routed in a lower space of the fuel cell unit 12, or routed in the ground below the fuel cell unit 12.

DESCRIPTION OF SYMBOLS 10 Fuel cell system 12 Fuel cell unit 12b Fuel cell side maintenance surface 13 Exhaust port 14 Water heater unit 18b Water heater side maintenance surface 20 Fuel cell module 24 Gas pipe 64 Water supply pipe 78 Hot water outlet pipe 90 Passage 90a One side edge I One side T N Length direction TW Passage width direction

In the first aspect, a heat storage unit-integrated fuel cell unit that is formed in a rectangular parallelepiped shape having a width dimension longer than a depth dimension, and has a fuel cell side maintenance surface having an exhaust port for exhaust on a side surface positioned in the width direction; The hot water supply side maintenance surface is set on the side surface that is arranged away from the fuel cell unit and connected to the fuel cell unit via a pipe, and is formed in a rectangular parallelepiped shape having a width dimension longer than the depth dimension and positioned in the width direction. The depth dimension of one unit of the fuel cell unit or the water heater unit is set shorter than the depth dimension of the other unit.

In a first aspect, the width dimension than the depth dimension is formed in a long rectangular shape, with a hot water storage tank for Rutotomoni heat storage fuel cell side maintenance surface is set having an exhaust port for exhaust on the side surface located in the width direction A fuel cell unit integrated with a heat storage unit and a fuel cell unit that is arranged away from the fuel cell unit and connected to the fuel cell unit via a pipe, and is formed in a rectangular parallelepiped shape having a width dimension longer than a depth dimension and positioned in the width direction A hot water heater unit having a hot water heater side maintenance surface on a side surface, and the depth dimension of the fuel cell unit is set longer than the depth dimension of the water heater unit .

As another arrangement example, when installing in a passage closed on one side, a fuel cell unit having a long depth dimension is arranged on one side of the passage, and is installed so that its maintenance surface faces the other side. And the water heater unit with a short depth dimension is installed in the other side of a channel | path.

In such an arrangement example, the space between the water heater unit and the passage side edge can be widened, and an access space can be secured. For this reason, the fuel cell unit can also be maintained by accessing from the other side of the passage.

At this time, the maintenance surface water heater unit, whereas it may be directed in any direction side and the other side, but if positioned toward the maintenance surface of the hot water supply unit to one side, use of the space between the two units Thus, maintenance of both units can be performed.

Claims (3)

A heat storage unit-integrated fuel cell unit in which a fuel cell side maintenance surface is set on a side surface formed in a rectangular parallelepiped shape having a width dimension longer than a depth dimension and positioned in the width direction;
A water heater unit that is connected to the fuel cell unit via a pipe, has a rectangular parallelepiped shape with a width dimension longer than a depth dimension, and has a water heater side maintenance surface set on a side surface positioned in the width direction;
With
A fuel cell system in which a depth dimension of one unit of the fuel cell unit or the water heater unit is set shorter than a depth dimension of the other unit.   The fuel cell system according to claim 1, wherein the pipe extends from the fuel cell side maintenance surface side of the fuel cell unit.   3. The fuel cell system according to claim 1, wherein the fuel cell unit is provided with a discharge portion for discharging exhaust gas from a built-in fuel cell module on the fuel cell side maintenance surface side.