fuel cell device

Abstract

To provide a fuel cell device which, even if rainwater enters from an exhaust port, is capable of preventing rainwater from mixing in condensate water and discharging exhaust gas.SOLUTION: An exhaust part 7 includes: a dew condensation water collection chamber 7A dew-condensing moisture contained in exhaust gas to collect the moisture; a rainwater collection chamber 7C collecting rainwater flowing in from an exhaust port 76; an exhaust chamber 7B which is provided with the exhaust port 76 and into which exhaust gas passing through the dew condensation water collection chamber 7A flows; a dew condensation water separation part 71 provided between the dew condensation water collection chamber 7A and the exhaust chamber 7B; and a rainwater separation part 72 provided between the rainwater collection chamber 7C and the exhaust chamber 7B. The exhaust chamber 7B is interposed between the rainwater collection chamber 7C and the dew condensation water collection chamber 7A, and the rainwater collection chamber 7C does not directly communicate with the dew condensation water collection chamber 7A, so that rainwater can be prevented from mixing in dew condensation water.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a fuel cell device.

Background Art

[0002] There is known a fuel cell device that generates electricity using a fuel gas containing hydrogen and an oxygen-containing gas (air) and supplies electricity to the outside. In such a fuel cell device, since exhaust gas containing water vapor is discharged from the fuel cell by power generation, so-called water self-sufficient operation is generally performed in which the exhaust gas is cooled to condense and recover the water vapor and use it as reformed water.

[0003] After the condensed water is recovered, the exhaust gas is discharged to the outside through an exhaust port through an exhaust path. At this time, if the exhaust gas contacts the outer surface of the housing and the temperature drops, there is a risk of condensation, and condensation is particularly likely to occur around the exhaust gas discharge port. When condensation adheres to the housing, it causes corrosion and the like, and reduces the durability of the device. Therefore, there is disclosed a device in which a deflector plate is installed near the outlet of the exhaust port so that the exhaust is discharged obliquely with respect to the outer surface of the housing to suppress the exhaust gas from directly contacting devices and wall surfaces around the housing (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, fuel cell systems are generally installed outdoors and are constantly exposed to wind and rain. If wind or rainwater enters the fuel cell system through the exhaust port, it can cause problems such as exhaust gases being pushed back and unable to be discharged properly, or rainwater entering the exhaust path and mixing with condensate.

[0006] The present invention aims to solve the above problems by providing a fuel cell device that can prevent rainwater from mixing with condensed water even when rainwater enters through the exhaust port, and can discharge exhaust gas. [Means for solving the problem]

[0007] The present invention relates to a fuel cell module comprising a fuel cell cell that generates electricity using a fuel gas and an oxygen-containing gas, A heat exchanger that generates condensate from exhaust gas discharged from the fuel cell module, It includes an exhaust section having an exhaust gas inlet and an exhaust port, which discharges the exhaust gas that has passed through the heat exchanger to the outside of the housing, The exhaust unit comprises: an exhaust gas inlet provided with a condensation water recovery chamber for condensing and recovering moisture contained in the exhaust gas; a rainwater recovery chamber for recovering rainwater flowing in from the exhaust port; an exhaust chamber provided with an exhaust port into which exhaust gas that has passed through the condensation water recovery chamber flows; a condensation water separation unit provided between the condensation water recovery chamber and the exhaust chamber; and a rainwater separation unit provided between the rainwater recovery chamber and the exhaust chamber. 、 The rainwater collection chamber is located below the condensation water collection chamber. The condensation water separation unit and the rainwater separation unit are integrally molded. It is a fuel cell device. [Effects of the Invention]

[0008] By configuring the system as described above, rainwater entering through the exhaust vent can be properly treated, preventing it from mixing with condensation. [Brief explanation of the drawing]

[0009] [Figure 1]This is a system configuration diagram of the fuel cell device of this embodiment. [Figure 2] This is an external perspective view of the fuel cell device of this embodiment. [Figure 3] This is a schematic diagram showing the exhaust section of this embodiment. [Figure 4] This is a modified example of the structural diagram schematically representing the exhaust section of this embodiment. [Figure 5] This is an exploded view showing an example of the exhaust section of this embodiment. [Figure 6] This is a cross-sectional view of the exhaust section of the fuel cell device of this embodiment. [Figure 7] This is a magnified cross-sectional view of the exhaust port. [Modes for carrying out the invention]

[0010] A preferred embodiment of the present invention will be briefly described by illustrating its operation.

[0011] The present invention relates to a fuel cell device equipped with an exhaust section for discharging exhaust gas from a fuel cell module to the outside of the housing. The exhaust section comprises: a condensation water recovery chamber provided with an exhaust gas inlet for condensing and recovering moisture contained in the exhaust gas; a rainwater recovery chamber for recovering rainwater flowing in from the exhaust port; an exhaust chamber provided with an exhaust port into which exhaust gas that has passed through the condensation water recovery chamber flows; a condensation water separation section provided between the condensation water recovery chamber and the exhaust chamber; and a rainwater separation section provided between the rainwater recovery chamber and the exhaust chamber. In this configuration, rainwater entering from the exhaust port passes through the rainwater separation section and is recovered in the rainwater recovery chamber. Furthermore, since the condensation water can be recovered in the condensation water recovery chamber and used as condensed water, the efficiency of condensed water recovery is improved. In addition, since the exhaust chamber is interposed between the rainwater recovery chamber and the condensation water recovery chamber and they are not directly connected, it is possible to prevent rainwater from mixing with the condensation water.

[0012] Furthermore, the condensation water separator is equipped with a protrusion that extends into the exhaust chamber, and an exhaust gas outlet is provided on the upper surface of the protrusion through which the exhaust gas flows out. This allows the exhaust gas to be quickly discharged from the housing without obstructing the flow of exhaust gas.

[0013] Further, the exhaust gas outlet is provided at a position higher than the upper end of the exhaust port. Thereby, since rainwater that has entered from the exhaust port is prevented from flowing into the exhaust gas outlet, it is possible to prevent the rainwater from mixing into the condensed water.

[0014] Also, a rainwater recovery chamber is disposed below the condensed water recovery chamber, and the condensed water separation section and the rainwater separation section are integrally formed. Thereby, the exhaust section can be configured compactly, and the number of components constituting the exhaust section can be reduced.

[0015] Also, since the rainwater separation section includes a strainer, foreign matter that has entered together with the rainwater is prevented from being recovered in the rainwater recovery chamber.

[0016] Also, a condensed water storage section for storing condensed water and a surplus water storage section for storing surplus water that has overflowed from the condensed water storage section are provided, and a rainwater discharge port provided at the bottom of the rainwater recovery chamber is connected to the surplus water storage section. Thereby, the recovered rainwater can be discharged to the outside of the housing together with the surplus water.

[0017] Also, the exhaust ports are arranged at a predetermined interval and have cross members that protrude inside the housing. When the moisture contained in the exhaust gas is cooled at the exhaust port and condenses, the condensed water adheres to and is collected on the convex portions of the cross members inside the housing, so that the condensed water is prevented from leaking outside the housing.

[0018] Also, the exhaust section includes an exhaust section main body having a lid body provided with an exhaust port, an exhaust gas inlet, and an opening to which the lid body is attached, and a partition member inserted into the exhaust section main body from the opening. A condensed water recovery chamber, a rainwater recovery chamber, and the exhaust chamber are formed by the lid body and the exhaust section main body, and the partition member constitutes the condensed water separation section and the rainwater separation section. Since the exhaust section is configured by combining the exhaust section main body and the partition member, the assemblability is excellent. Also, the inside of the exhaust section can be easily separated and partitioned into a condensed water recovery chamber, a rainwater recovery chamber, and an exhaust chamber.

Example

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0020] Figure 1 is a system configuration diagram of the fuel cell device of this embodiment. The fuel cell device 100 includes a fuel cell module 1, and several auxiliary devices such as a first heat exchanger 2, a heat storage tank 3, a condensate tank 4, a radiator 5, an air supply device 14, a fuel supply device 15, and a reformed water supply device 16 are housed within the housing 50 to operate the fuel cell module 1. It is not necessary for all of the above-mentioned devices to be housed within the housing 50; for example, the first heat exchanger 2 and the heat storage tank 3 may be provided outside the housing 50. Furthermore, a fuel cell device in which some of the above-mentioned devices are omitted is also possible.

[0021] The fuel cell module 1 is constructed by housing a fuel cell 11 that generates electricity using fuel gas and oxygen-containing gas, and a reformer 12 that generates the fuel gas supplied to the fuel cell 11, inside a box-shaped storage container 10.

[0022] The configuration of the fuel cell 11 is not particularly limited, but for example, it may have a cell stack structure in which multiple fuel cell cells are arranged. The fuel cell 11 with a cell stack structure is constructed, for example, by fixing the lower end of each fuel cell to a manifold using an insulating bonding material such as a glass seal material.

[0023] The reformer 12 steam reforms raw fuel gases such as natural gas and LPG to produce fuel gas supplied to the fuel cell 11. The reformer 12 is connected to a fuel supply device 15 that supplies raw fuel gas and a reformed water supply device 16 that supplies reformed water. The raw fuel gas and reformed water undergo a reforming reaction in the heated reformer 12 to produce fuel gas containing hydrogen.

[0024] The fuel cell 11 is supplied with fuel gas produced in the reformer 12 and air (oxygen-containing gas) introduced by the air supply device 14. As the fuel gas passes through the fuel cell cell, it reacts with the oxygen-containing gas to generate electricity. The fuel gas and oxygen-containing gas that are not used for power generation merge and burn at the top of the fuel cell 11. This combustion of fuel gas generates high-temperature exhaust gas, which heats the reformer 12. The exhaust gas generated in this way within the fuel cell module 1 is supplied to the first heat exchanger 2.

[0025] The first heat exchanger 2 is connected to a heat storage tank 3, a heat transfer pump P1, and a radiator 5 via piping, forming a first heat transfer circulation line HC1. A heat transfer medium is introduced into this first heat transfer circulation line HC1, and heat exchange takes place between this heat transfer medium and the aforementioned exhaust gas in the first heat exchanger 2, heating the heat transfer medium. Water or other materials can be used as the heat transfer medium, and the heat storage tank 3 stores the heat transfer medium whose temperature has risen due to heat exchange. The heat transfer medium stored in the heat storage tank 3 is sent to the radiator 5 to be cooled, and after exchanging heat with the exhaust gas again in the first heat exchanger 2, it is returned to the heat storage tank 3. As a result, the heat transfer medium with the highest temperature is stored in the heat storage tank 3 from the top, forming a temperature stratification.

[0026] Furthermore, a condensate tank 4 is connected to the first heat exchanger 2 via a condensate recovery passage 20. When the exhaust gas generated by the fuel cell module 1 is cooled by heat exchange, the water vapor contained in the exhaust gas is separated into water and gas, and the separated water is recovered in the condensate tank 4 through the condensate recovery passage 20. On the other hand, the gas from which the water has been removed is discharged outside the housing 50 after passing through the exhaust passage 21. An exhaust section 7 is provided at the downstream end of the exhaust passage 21. Details of the exhaust section 7 will be described later.

[0027] In the condensate tank 4, impurities are removed from the recovered water through an ion exchanger (not shown) and other means to produce pure water. The purified water is supplied to the reformer 12 by the water supply device 16 and used as reformed water. The condensate tank 4 is equipped with a condensate storage section 4a for storing condensate water and an excess water storage section 4b for storing excess water that overflows from the condensate storage section 4a. The water supply device 16 is connected to the condensate storage section 4a, and a drainage channel 25 is connected to the excess water storage section. Excess condensate water that is not used as reformed water is neutralized in the excess water storage section 4b and then discharged outside the housing 50 through the drainage channel 25.

[0028] The fuel supply device 15, which supplies raw fuel to the reformer 12, is equipped with auxiliary equipment such as a first solenoid valve V1, a pressure sensor PS, a desulfurizer DS, a gas flow meter FM1, a fuel pump B1, and a second solenoid valve V2 on the raw fuel flow path 22 connected to the fuel supply source. The reformed water supply device 16, which supplies reformed water to the reformer 12, is equipped with auxiliary equipment such as a reformed water pump P3 on the reformed water flow path 23 connected to the condensate tank 4. The air supply device 14, which supplies oxygen-containing gas to the fuel cell module 1, is equipped with auxiliary equipment such as an air flow meter FM2 and a blower B2 on the oxygen-containing gas flow path 24. Note that the auxiliary equipment listed here is just an example, and other configurations with other auxiliary equipment are also possible.

[0029] Furthermore, the fuel cell device 100 is equipped with a control device 30 for controlling the operation of various devices, as well as a power supply adjustment unit (power conditioner) 40 for converting the DC power generated by the fuel cell module 1 into AC power and adjusting the amount of the converted electricity supplied to the external load.

[0030] Furthermore, the fuel cell system 100 may also include a second heat exchanger 6, a heat supply pump P2 for circulating the heat medium from the heat storage tank 3, and a second heat medium circulation line HC2 including piping connecting these. In the second heat medium circulation line HC2, tap water supplied from the outside via a supply channel 26 is heated in the second heat exchanger 6 using a high-temperature heat medium stored in the heat storage tank 3. The heated water can be supplied via a supply channel 27 to an external reheating device such as a water heater. The fuel cell system 100 may also be a so-called monogeneration system that does not supply hot water to the outside.

[0031] Figure 2 is an external perspective view of the fuel cell device of this embodiment. The housing 50 of the fuel cell device 100 is rectangular in shape and comprises a bottom plate 51, a top panel 52, and a plurality of side panels 53 to 56. The side panels include a left side panel 53, a right side panel 54, a front panel 55, and a rear panel 56. The fuel cell device 100 also has a maintenance surface that is pre-configured for maintenance, and the top panel 52 and some of the plurality of side panels 53 to 56 are maintenance panels that are removed during maintenance. In this embodiment, the right side panel 54 and the front panel 55 are maintenance panels.

[0032] The right side panel 54 consists of an upper panel 541 and a lower panel 542. An exhaust section 7 is connected to the upper panel 541, and exhaust gas generated by the fuel cell device 100 is discharged outside the housing 50 through an exhaust port 76 provided in the exhaust section 7.

[0033] Figure 3 is a schematic structural diagram of the exhaust section of this embodiment. The exhaust section 7 comprises a condensation water recovery chamber 7A, an exhaust chamber 7B, and a rainwater recovery chamber 7C. The condensation water recovery chamber 7A is a space for condensing and recovering moisture contained in the exhaust gas, and is provided with an exhaust gas inlet 74 through which the exhaust gas is introduced, and an exhaust passage 21 is connected to this exhaust gas inlet 74. The condensation water generated in the condensation water recovery chamber 7A is recovered in the condensate tank 4 through the exhaust passage 21, treated for purification, and then used as reforming water. The exhaust chamber 7B is a space into which the exhaust gas that has passed through the condensation water recovery chamber 7A flows, and is provided with an exhaust port 76 for discharging the exhaust gas outside the housing 50. The rainwater recovery chamber 7C is a space for recovering rainwater that has entered through the exhaust port 76, and is provided with a rainwater outlet 75 for discharging the recovered rainwater.

[0034] A condensation water separation unit 71 is provided between the condensation water recovery chamber 7A and the exhaust chamber 7B, and a rainwater separation unit 72 is provided between the rainwater recovery chamber 7C and the exhaust chamber 7B. The condensation water separation unit 71 is provided to prevent condensation water generated in the condensation water recovery chamber 7A from flowing into the exhaust chamber 7B, and is configured with, for example, ventilation holes or slits, a mesh filter, etc., so that exhaust gas can pass through but condensation water cannot. The rainwater separation unit 72 is provided to allow rainwater that has entered the exhaust chamber 7B via the exhaust port 76 to flow into the rainwater recovery chamber 7C. The rainwater separation unit 72 may also be equipped with a filter, etc., to prevent debris that has entered the exhaust chamber 7B from flowing into the rainwater recovery chamber 7C along with the rainwater.

[0035] Furthermore, an isolation section 73 is provided between the condensation water collection chamber 7A and the rainwater collection chamber 7C. The isolation section 73 may be formed by a plate-shaped partition wall, or, as shown in Figure 4, it may be formed by creating a space between the condensation water collection chamber 7A and the rainwater collection chamber 7C. By providing the isolation section 73, the condensation water collection chamber 7A and the rainwater collection chamber 7C are configured not to communicate with each other.

[0036] In the above configuration, the exhaust gas flowing through the exhaust passage 21 flows into the condensation water recovery chamber 7A from the exhaust gas inlet 74. In the condensation water recovery chamber 7A, condensation water is generated when moisture contained in the exhaust gas condenses, and this condensation water flows in the reverse direction through the exhaust passage 21 into the condensation water tank 4. As a result, condensation water is also recovered from the exhaust gas after it has passed through the first heat exchanger 2, improving the efficiency of condensation water recovery. Furthermore, the condensation water separation unit 71 is provided between the exhaust passage and the exhaust chamber 7B, preventing the condensation water from flowing out into the exhaust chamber 7B along with the exhaust gas, thus allowing the condensation water to be recovered as condensation water without waste. After the condensation water has been recovered, the exhaust gas flows into the exhaust chamber 7B through the condensation water separation unit 71 and is discharged outside the housing 50 from the exhaust port 76.

[0037] Wind and rainwater blown in through the exhaust port 76 flow into the exhaust chamber 7B. After foreign matter such as debris is removed from the rainwater that flows into the exhaust chamber 7B by the rainwater separation unit 72, it flows into the rainwater recovery chamber 7C and is discharged outside the exhaust unit 7 through the rainwater outlet 75. By connecting piping to the rainwater outlet 75 and connecting it to the drain discharge point of other auxiliary equipment of the fuel cell system (for example, the heat storage tank 3 or the condensate tank 4), the rainwater can be treated as drain water.

[0038] A separation section 73 is provided between the condensation water collection chamber 7A and the rainwater collection chamber 7C, preventing direct communication between them. Therefore, it is possible to prevent rainwater from mixing with the condensation water.

[0039] Next, the detailed shape of the exhaust section 7 will be described using Figures 5 and 6. Figure 5 is an exploded view showing an example of the exhaust section of this embodiment, and Figure 6 is a cross-sectional view of the area near the exhaust section in the fuel cell device of this embodiment. In Figure 6, the flow of exhaust gas is represented by solid arrows, the flow of condensation water by dashed arrows, and the flow of rainwater by dashed-dotted arrows.

[0040] The exhaust section 7 is comprised of an exhaust section body 81, a partition member 82, a gasket 83, and a cover 84. By combining these components, three chambers are formed inside the exhaust section 7: a condensation water recovery chamber 7A, an exhaust chamber 7B, and a rainwater recovery chamber 7C. This configuration allows the exhaust section 7 to be easily assembled and to be easily separated into the condensation water recovery chamber 7A, the rainwater recovery chamber 7C, and the exhaust chamber 7B.

[0041] The exhaust unit body 81 forms the outer casing of the condensation water recovery chamber 7A, the exhaust chamber 7B, and the rainwater recovery chamber 7C. Specifically, the exhaust unit body 81 is a single molded resin product and includes a first pipe section 810 that forms the condensation water recovery chamber 7A, a second pipe section 813 that forms the rainwater recovery chamber 7C, a third pipe section 815 that forms the exhaust chamber 7B, and a flange section 817 formed at the end of the third pipe section 815. In this configuration, the exhaust chamber 7B is in communication with both the condensation water recovery chamber 7A and the rainwater recovery chamber 7C.

[0042] The first pipe section 810 comprises a roughly cylindrical main pipe section 811 connected to the third pipe section 815, and a side pipe section 812 connected to the side of the main pipe section 811. The end of the side pipe section 812 is an exhaust gas inlet 74, and an exhaust passage 21 is connected to the side pipe section 812. The second pipe section 813 is located below the first pipe section 810, and a rainwater outlet 75 for discharging rainwater is formed on its bottom surface, with a drain pipe 814 extending downward from the rainwater outlet 75. The third pipe section 815 is located to the side of the first pipe section 810 and the second pipe section 813, and an outwardly extending flange section 817 is formed around an opening 816 provided at its end. A cover 84 is attached to the flange section 817 with a gasket 83 in between, and is fixed with screws.

[0043] The partition member 82 has a partition body 820 made of resin material and a strainer 828 that removes foreign matter such as dirt from rainwater, and is inserted into the third pipe section 815 through the opening 816 of the exhaust section body 81. By being positioned in a predetermined location within the exhaust section body 81, the partition member 82 is configured to serve as both a condensation water separator 71 and a rainwater separator 72.

[0044] The partition body 820 has a rectangular main plate portion 821, three arm portions 822 extending forward from the top and sides of the main plate portion 821, and leg portions 823 provided below the main plate portion 821 to which a strainer 828 is attached. The length of the arm portions 822 is set so as to abut against the inner surface of the lid 84, and by attaching the lid 84, the partition body 820 is prevented from coming off. The main plate portion 821 is also provided with a communication opening 824 that opens slightly above its center, and has a projection portion 825 extending forward from the communication opening 824 and a connecting portion 827 extending rearward from the communication opening 824.

[0045] As shown in Figure 6, the connecting portion 827 of the partition member 82 is fitted into the outlet of the condensation water recovery chamber 7A. The exhaust chamber 7B and the condensation water recovery chamber 7A are connected via a communication port 824, and the protruding portion 825 extending from the communication port 824 is provided in a state where it protrudes into the exhaust chamber 7B. In addition, an exhaust gas outlet 826 is provided on the upper surface of the protruding portion 825, and the exhaust gas that has passed through the condensation water recovery chamber 7A flows into the exhaust chamber 7B from the exhaust gas outlet 826. By providing the exhaust gas outlet 826 to protrude into the exhaust chamber 7B in this way, the exhaust gas can be quickly discharged from the housing 50 without obstructing the flow of exhaust gas.

[0046] Condensation generated in the condensation recovery chamber 7A flows from the main pipe section 811 through the side pipe section 812 and back through the exhaust passage 21 to be recovered in the condensation tank 4. Since a partition member 82 is placed between the condensation recovery chamber 7A and the exhaust chamber 7B, the condensation can be recovered in the condensation tank 4 without flowing out into the exhaust chamber 7B.

[0047] The exhaust gas outlet 826 may be positioned higher than the upper end of the exhaust port 76 formed in the cover 84. This prevents rainwater that enters through the exhaust port 76 from flowing into the exhaust gas outlet 826, thus preventing rainwater from mixing with condensation.

[0048] Furthermore, the rainwater collection chamber 7C and the exhaust chamber 7B are connected via a strainer 828. Rainwater entering the exhaust chamber 7B from the exhaust port 76 is filtered by the strainer 828 to remove debris and other impurities before flowing into the rainwater collection chamber 7C. The rainwater that flows into the rainwater collection chamber 7C is then discharged outside the exhaust section 7 through the rainwater outlet 75 and a drain pipe 814. This drain pipe 814 can be connected to the excess water storage section 4b of the condensate tank 4 using piping, allowing the rainwater to be treated together with excess condensate. The rainwater that flows into the excess water storage section 4b is neutralized together with the excess condensate before being discharged from the housing 50 through the drainage channel. Since debris and other foreign matter are removed from the rainwater as it passes through the strainer 828, it is also prevented from foreign matter flowing into the excess water storage section 4b.

[0049] As described above, the exhaust unit 7 of this embodiment is assembled by inserting a partition member 82 inside the exhaust unit body 81, thus offering excellent assembly capabilities and allowing for easy separation and partitioning into a condensation water recovery chamber 7A, a rainwater recovery chamber 7C, and an exhaust chamber 7B. Furthermore, by positioning the rainwater recovery chamber 7C below the condensation water recovery chamber 7A, the condensation water separation unit 71 and the rainwater separation unit 72 can be combined into a single component (partition member 82), thereby reducing the number of parts constituting the exhaust unit 7 and allowing for a compact configuration of the exhaust unit 7.

[0050] Figure 7 is an enlarged cross-sectional view of the exhaust port. The exhaust port 76 has multiple convex support members 840 on the inside of the housing 50, and a vertically elongated slit-shaped opening is formed in the exhaust port 76 when the support members 840 are arranged at predetermined intervals.

[0051] As the exhaust gas is cooled as it passes through the exhaust port 76, it is possible that moisture contained in the exhaust gas will condense at the exhaust port 76. In this case, the condensed water will adhere to the support beam 840 provided at the exhaust port 76, but since the support beam 840 is convex inward into the housing 50, the condensed water will adhere to the support beam 840 on the inside of the housing 50. In other words, leakage of condensed water onto the outer surface of the lid 84 is prevented. [Explanation of Symbols]

[0052] 1 Fuel cell module 2 1st heat exchanger (heat exchanger) 4a Condensate storage section 4b Excess water storage section 7. Exhaust section 7A Condensation Water Recovery Room 7B Exhaust Chamber 7C Rainwater collection room 71 Condensation water separation section 72 Rainwater separation section 74 Exhaust gas inlet 75 Rainwater drain 76 Exhaust vent 81 Exhaust Unit 82 Partition Member 825 Protrusion 826 Exhaust gas outlet 828 Strainer 84 Lid 840 Crosspiece material

Claims

1. A fuel cell module equipped with a fuel cell cell that generates electricity using fuel gas and oxygen-containing gas, A heat exchanger that generates condensate from exhaust gas discharged from the fuel cell module, It includes an exhaust section having an exhaust gas inlet and an exhaust port, which discharges the exhaust gas that has passed through the heat exchanger to the outside of the housing, The exhaust unit comprises: an exhaust gas inlet provided with a condensation water recovery chamber for condensing and recovering moisture contained in the exhaust gas; a rainwater recovery chamber for recovering rainwater flowing in from the exhaust port; an exhaust chamber provided with an exhaust port into which exhaust gas that has passed through the condensation water recovery chamber flows; a condensation water separation unit provided between the condensation water recovery chamber and the exhaust chamber; and a rainwater separation unit provided between the rainwater recovery chamber and the exhaust chamber. The rainwater collection chamber is located below the condensation water collection chamber. A fuel cell device in which the condensation water separation unit and the rainwater separation unit are integrally molded.

2. The fuel cell device according to claim 1, wherein the rainwater separation unit is equipped with a strainer for removing foreign matter from rainwater.

3. The condensation water separation unit is equipped with a protrusion that extends into the exhaust chamber, The fuel cell apparatus according to claim 1, wherein an exhaust gas outlet for exhaust gas to flow out is provided on the upper surface of the protruding portion.

4. The fuel cell device according to claim 3, wherein the exhaust gas outlet is provided at a position higher than the upper end of the exhaust port.

5. A condensate storage section for storing the aforementioned condensate, The system includes an excess water storage section for storing excess water that overflows from the condensate storage section. The aforementioned rainwater collection chamber is equipped with a rainwater outlet at the bottom. The fuel cell device according to claim 1, wherein the rainwater outlet is connected to the excess water storage section.

6. The fuel cell device according to claim 1, wherein the exhaust port has bracing members arranged at predetermined intervals and protruding inward from the housing.

7. The aforementioned exhaust section is A lid having the aforementioned exhaust port, An exhaust section body having the exhaust gas inlet and an opening to which the cover is attached, The system comprises a partition member inserted into the exhaust unit body through the aforementioned opening. The lid and the exhaust unit body form the condensation water collection chamber, the rainwater collection chamber, and the exhaust chamber, respectively. The fuel cell device according to any one of claims 1 to 6, wherein the partition member constitutes the condensation water separation section and the rainwater separation section.

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