JP2010027236A - Fuel cell system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell system that enables a power-generating operation without requiring a maintenance personnel to come in a room of an institution, even in an emergency or not. <P>SOLUTION: The system includes: a fuel cell 1; a fuel supplying system 2 for supplying fuel to a fuel electrode 10 of the fuel cell 1; an oxidant supplying system 5 for supplying an oxidant to an oxidant electrode 11 of the fuel cell 1; and a housing 500 provided inside and/or outside a room of an institution. A first operation display section 700 is provided in the institution so as to make it possible for a user in the room of the institution to perform an operation, make settings regarding a power-generating operation of the system, and display information on the power-generating operation of the system. A second operation display section 800 is provided in the housing 500 so as to be viewed from the outside of the room of the institution, and is used to make settings regarding a power-generating operation of the system, and display information on the power-generating operation of the system. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fuel cell system installed in a facility such as a building.

There is known a fuel cell system provided with a remote control type operation display unit for operating a power generation operation of a fuel cell (Patent Document 1). This operation display unit has a switch on / off, a telephone call switch, an automatic bath boiling switch, etc., and is assumed to be installed in the room of a facility such as a building. Displays the progress of taking the stop.
JP 2007-109463 A

  In the above-described technique, normally, a user existing in a facility room can set the power generation operation of the fuel cell system by operating the operation display unit. However, in the event of an emergency, such as when the user in the facility room is absent, when the user's body in the facility room is inadequate, or when the facility is locked, etc. There is a problem that the power generation operation of the fuel cell system cannot be set unless the etc. enters the room of the facility.

  The present invention has been made in view of the above-described circumstances, and when the user in the facility room is absent, the user's body in the facility room is malfunctioning, or when the facility is locked, It is an object of the present invention to provide a fuel cell system capable of operating the power generation operation of the fuel cell system without having to enter the room of the facility even when there is no urgency. To do.

  The fuel cell system according to the present invention has (i) a fuel electrode to which fuel is supplied and an oxidant electrode to which oxidant is supplied, and supplies power generated by the fuel and oxidant to a power load of the facility. (Ii) a fuel supply system for supplying fuel to the fuel electrode of the fuel cell, an oxidant supply system for supplying oxidant to the oxidant electrode of the fuel cell, and (iii) a facility And (v) a fuel cell system having a housing having a housing chamber for housing a fuel cell, a fuel supply system, and an oxidant supply system, and (iv) operated by a user inside the facility A first operation display unit that is provided in the facility room so as to set an operation related to the power generation operation of the fuel cell system and displays information related to the power generation operation of the fuel cell system; Dew from outside It provided in the housing so as to be, and sets an operation related to the power generation operation of the fuel cell system, and second operation display section for displaying information about the power generation operation of the fuel cell system.

  The first operation display unit is provided in the facility room so that a user in the facility room can operate, sets an operation related to the power generation operation of the fuel cell system (hereinafter also referred to as a system), and generates power in the system. Display information about. On the other hand, the second operation display unit is provided in the housing so as to be exposed from the outside of the facility, and sets an operation related to the power generation operation of the system and displays information related to the power generation operation of the system. Here, the facility means a structure having a room where a person can exist. Accordingly, facilities include buildings with rooms, vehicles with rooms, hulls with rooms, and the like. Buildings include houses, buildings, condominiums and apartments.

  Normally, a user existing in the room of the facility can operate the power generation operation of the system by operating the first operation display unit. Even if there is no user in the facility room, the user's body in the facility room is unwell, the facility is locked, etc., maintenance personnel etc. Even without entering, the power generation operation of the system can be operated.

  The casing is provided inside and / or outside the facility. In this case, as long as the second operation display unit is provided in the casing so that it can be exposed from the outside of the facility, the casing may be provided outside the facility or may be provided in the room of the facility. Alternatively, it may be provided both inside and outside the housing.

  The present invention can include the following preferred embodiments.

  Preferably, the second operation display unit invalidates the operation based on the first operation display unit, and prioritizes the operation based on the second operation display unit over the operation based on the first operation display unit. Therefore, even when the user in the facility room is absent, the user's body in the facility room is in a malfunction, the facility is locked, etc., the maintenance person does not enter the facility room. Both can operate the power generation operation of the system.

  -Preferably, the operation content by a 2nd operation display part contains the operation content which cannot be operated by a 1st operation display part. Users inside the facility may not necessarily be familiar with the detailed structure and function of the system. Therefore, the operation content that can be operated on the first operation display unit relates to the basic and simple operation of the system. On the other hand, the operation content that can be operated on the second operation display unit is a more detailed operation of the system. For this reason, it is possible to prevent a user in the facility room from operating the second operation display unit and causing an unexpected operation in the system. Therefore, preferably, the display content by the second operation display unit includes display content that is not displayed on the first operation display unit. In this case, it is possible to prevent a user in the facility room from operating the second operation display unit by mistake and causing an unexpected operation in the system.

  -Preferably, the 2nd operation display part is spaced apart from the 1st operation display part. In this case, it is possible to avoid as much as possible that a user (for example, a child, an elderly person, a severely disabled person, etc.) in a facility room that is not necessarily familiar with the functions of the system operates the second operation display unit by mistake. Therefore, unexpected operation can be avoided in the system.

  Preferably, the system includes a reformer for generating fuel to be supplied to the fuel cell in the housing chamber of the housing from the fuel raw material by reforming operation, and reforming of the reformer as information regarding the power generation operation of the system. And a power generation information display unit for displaying information related to quality operation. Preferably, the power generation information display unit is provided in the second operation display unit. As a result, it is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the reforming operation of the reformer, and to prevent troubles in the reforming operation.

  Preferably, the system includes a reformer for generating fuel to be supplied to the fuel cell stored in the housing chamber of the housing from the fuel raw material by reforming operation, and power generation for executing a mode related to the power generation operation of the system A mode operation unit. Preferably, the power generation mode operation unit is provided in the second operation display unit. As a result, it is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the reforming operation of the reformer, and to prevent troubles in the reforming operation.

  Preferably, the system includes a heat exchanger that is housed in a housing chamber of the housing and collects the exhaust heat of the system, a heat exchange passage through which a heat exchange medium that collects the exhaust heat from the heat exchanger flows, and a heat exchange medium A heat exchange medium exchange mode operation unit for executing a mode for confirming whether or not the system operates normally after the exchange. Preferably, the heat exchange medium exchange mode operation unit is provided in the second operation display unit. As a result, it is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the heat exchange medium exchange mode operation unit, thereby preventing troubles in operation.

  -Preferably, the system reduces the sulfur component contained in the fuel feedstock that forms the fuel supplied to the fuel electrode and replaces the desulfurized material and whether the system operates normally after replacing the desulfurized material. And a desulfurization material replacement mode operation unit for executing a mode for checking whether or not. Preferably, the desulfurization material exchange mode operation unit is provided in the second operation display unit. As a result, it is possible to suppress a user who is not necessarily familiar with the function of the system from being excessively involved in the desulfurization material replacement mode operation unit, thereby preventing troubles in operation.

  Preferably, the system comprises a tank for storing the liquid phase and / or gas phase water for reforming, a water purification material for purifying the water stored in or stored in the tank, and water purification A water refining material replacement mode operation unit for executing a mode for confirming whether or not the system normally operates after the material replacement. Preferably, the water purification material replacement mode operation unit is provided in the second operation display unit. As a result, it is possible to suppress a user who is not necessarily familiar with the function of the system from being excessively involved in the water refining material replacement mode operation unit, thereby preventing troubles in driving.

  -Preferably, the system cools the fuel cell during power generation operation and circulates a replaceable refrigerant, and a mode for confirming whether the system operates normally after replacing the refrigerant in the circulation path. And a refrigerant replacement mode operation unit for executing. Preferably, the refrigerant exchange mode operation unit is provided in the second operation display unit. As a result, it is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the refrigerant exchange mode operation unit, thereby preventing troubles in driving.

  Preferably, the system cools the fuel cell during power generation operation and circulates a replaceable refrigerant (for example, a coolant such as cooling water), and increases the purity of the refrigerant in the circulation path to electrically isolate the refrigerant. A replaceable refrigerant treatment material that performs insulation treatment to improve performance, and a refrigerant treatment material exchange mode operation unit for executing a mode for confirming whether or not the system normally operates after the refrigerant treatment material is exchanged. Have Preferably, the refrigerant treatment material replacement mode operation unit is provided in the second operation display unit. As a result, it is possible to suppress a user who is not necessarily familiar with the function of the system from being excessively involved in the refrigerant processing material replacement mode operation unit, thereby preventing troubles in driving.

  Preferably, the system cleans the oxidant supplied by the fuel cell and also has a replaceable cleaning material such as a filter and a mode for confirming whether the system normally operates after the cleaning material is replaced. And a purifier replacement mode operation unit for execution. Preferably, the purification material replacement mode operation unit is provided in the second operation display unit. As a result, it is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the purification material replacement mode operation unit, thereby preventing troubles in driving.

  Preferably, after the system detects or determines that flooding has occurred in the fuel cell, the system supplies purge gas to the inside of the fuel cell and discharges excess water inside the fuel cell to the outside of the fuel cell. And a purge mode operation unit for executing the mode. Preferably, the purge mode operation unit is provided in the second operation display unit. As a result, it is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the purge mode operation unit, thereby preventing troubles in driving.

  ・ Power generation mode operation unit, heat exchange medium exchange mode operation unit, desulfurization material exchange mode operation unit, water purification material exchange mode operation unit, refrigerant exchange mode operation unit, refrigerant treatment material exchange mode operation unit, purification material exchange mode operation The purge mode operation unit may be configured by a single switch in the second operation display unit. Or you may be comprised by the combination of the some switch in a 2nd operation display part.

  Preferably, the second operation display unit displays a time required for executing each mode and / or a remaining time when executing each mode. The maintenance person can grasp the mode execution time and / or the remaining time of the mode, can perform other work during the remaining time, and work efficiency is improved.

  -Preferably, the fuel cell is provided so that grid connection with a commercial power source is possible, and the casing is equipped with a breaker for cutting off the electrical link between the commercial power source and the fuel cell. The display is adjacent to the breaker. At the time of maintenance, since the electrical connection between the commercial power source and the fuel cell may be interrupted, maintenance is easy.

  According to the present invention, when the user in the facility room is absent, when the user's body in the facility room is out of order, when the facility is locked, etc., even when there is urgency, Even when there is no urgency, the maintenance operator or the like can operate the power generation operation of the fuel cell system without entering the room of the facility.

  Hereinafter, embodiments of the present invention will be specifically described.

(Embodiment 1)
FIG. 1 shows a first embodiment. The system (hereinafter also referred to as a system) includes a stack 1 formed of a fuel cell, a fuel supply system 2 that supplies fuel to the fuel electrode 10 of the stack 1, and an oxidant gas that is supplied to the oxidant electrode 11 of the stack 1. An oxidant supply system 5, a cooling system 6 that cools the stack 1, and a control device 7 are included. The fuel supply system 2 includes a fuel supply passage 20 that connects the fuel raw material source 21 and the fuel electrode 10 of the stack 1, a fuel valve 22 and a fuel pump 23 (fuel raw material transport source) provided in the fuel supply passage 20, a fuel A reformer 24 provided in the supply passage 20 to reform the fuel raw material with water vapor to form a gaseous fuel (hydrogen-containing gas, anode gas), a valve 25v on the outlet side of the reformer 24, a fuel supply A condenser 27 provided in the passage 20 for reducing the moisture of the gaseous fuel, an inlet valve 28 for opening and closing the fuel supply passage 20, and an off-gas of the fuel discharged from the fuel electrode 10 of the stack 1 are supplied to the burner 26. It has a fuel discharge passage 29, an outlet valve 30 provided in the fuel discharge passage 29, and a condenser 29h for reducing the moisture of the offgas. The fuel supply passage 20 is provided with a desulfurizer 97 (harmful component reducer). The desulfurization material 97 a (hazardous component reducing material) of the desulfurizer 97 has a function of reducing sulfur components as harmful components contained in the fuel material before being supplied to the reforming unit 25. The fuel supply passage 20 is provided with a bypass passage 46 having a bypass valve 45.

  The stack 1 has a large number of membrane electrode assemblies (MEAs). The MEA has a solid polymer type ion conductive membrane 12 (for example, fluorine-based, hydrocarbon-based, or inorganic-based material) sandwiched between a fuel electrode 10 and an oxidant electrode 11. A fuel cell generates electric energy by an oxidation-reduction reaction. The MEA may be a sheet type or a tube type. A sensor 10s for detecting the pressure in the fuel electrode 10 and a sensor 11s for detecting the pressure in the oxidant electrode 11 are provided. The stack 1 is connected to a commercial power source 49 through a breaker 47 and an inverter 48 having a cutoff function and a connection function, and is connected to the grid. When the power of the stack 1 is insufficient, a power load (for example, an internal load provided inside the system or an external load provided outside the system) is operated by the power of the commercial power supply 49. The inverter 48 has a microcomputer.

  As shown in FIG. 1, a reformer 24 includes a reformer 25 that reforms a fuel material with gas-phase or liquid-phase water, and a burner that heats the reformer 25 so as to be suitable for the reforming reaction. 26 (heating unit). A sensor 25s for detecting the pressure in the reforming unit 25 is provided. As shown in FIG. 1, a reforming water system 34 for supplying reforming gas-phase or liquid-phase water to the reforming unit 25 is provided.

  The reforming water system 34 includes a tank 35 that stores the condensed water of the system as reforming water, a reforming water passage 36 that connects the tank 35 and the reforming unit 25, and water provided in the reforming water passage 36. It has a pump 37 (water conveyance source) and a water valve 38, and an evaporation section 39 that converts liquid phase water into a vapor phase to produce water vapor. Sensors 93 and 94 for detecting the amount of water in the tank 35 are provided. The evaporation unit 39 may be separate from the reformer 24 or may be mounted on the reformer 24.

  A water purification system 9 is connected to the reforming water system 34. The water purification system 9 purifies the raw water supplied to the tank 35, and includes a valve 90 for supplying raw water and a first water having a first water purification material 91a having a water purification action such as an ion exchange resin. It has the refinement | purification part 91 and the 2nd water purification part 92 which has the 2nd water purification material 92a which has water purification effects, such as an ion exchange resin. Condensed water generated in each condenser of the system is supplied to the second water purification unit 92.

  Further, as shown in FIG. 1, the fuel supply system 2 includes a branch passage 40 having a valve 40 a for communicating the fuel supply passage 20 and the burner 26, an air passage 41, and a pump 42 (combustion provided in the air passage 41. Air carrier source). The air passage 41 may communicate with the oxidant supply passage 52. The fuel material of the fuel material source 21 is supplied from the branch path 40 to the burner 26 as a combustion fuel. When the pump 42 is operated, combustion air is supplied to the burner 26. As a result, the fuel for combustion is burned by the burner 26, and the reforming part 25 is heated. The fuel material reformed in the reforming section 25 may be gaseous or liquid, but is preferably gaseous such as city gas. In some cases, LPG, kerosene, methanol, dimethyl ether, gasoline, biogas and the like can be exemplified instead of city gas. The exhaust gas combusted by the burner 26 is discharged to the exhaust passage 43 and is discharged to the outside after the moisture is reduced by the condenser 43h.

  As shown in FIG. 1, the oxidant supply system 5 purifies the humidifier 50 having a moisture retaining member 50c that partitions the humidification path 50a and the moisture absorption path 50b, and the oxidant gas (air) with a filter 51 (purification material). An oxidant supply passage 52 that supplies the oxidant electrode 11 of the stack 1 via the humidification passage 50a of the humidifier 50, and an oxidant pump 53 (oxidant transport source) provided in the oxidant supply passage 52. The inlet valve 54 for opening and closing the oxidant supply passage 52 and the wet oxidant off-gas discharged from the oxidant electrode 11 of the stack 1 reduced the moisture through the moisture absorption path 50b of the humidifier 50 and the condenser 55h. An oxidant discharge passage 55 to be discharged to the outside later, a return bypass route 56 that communicates with the oxidant discharge passage 55 and bypasses the moisture absorption passage 50b of the humidifier 50, and an acid discharged from the oxidant electrode 11 of the stack 1 And a bypass valve 57 for backward flowing agent off-gas bypass passage 56. The oxidant supply passage 52 is provided with a sensor 52s that detects the flow rate per unit time of the oxidant gas (air) flowing therethrough.

  The moisture retention member 50c has moisture retention and gas barrier properties, and is formed of, for example, an ion exchange membrane. As can be understood from FIG. 1, the bypass valve 57 can change the ratio of the flow rate flowing in the moisture absorption path 50 b of the humidifier 50 and the flow rate flowing in the bypass path 56. Furthermore, the detour 58 for the forward path that communicates with the oxidant supply passage 52 and bypasses the humidification path 50 a of the humidifier 50, and the oxidant gas immediately before being supplied to the oxidant electrode 11 of the stack 1 flow to the detour 58. And a detour valve 59 for the forward path. The bypass valve 59 can change the ratio of the flow rate flowing through the humidification path 50 a of the humidifier 50 and the flow rate flowing through the bypass circuit 58. In some cases, the detour 58 for the forward path and the detour valve 59 for the forward path can be eliminated.

  The cooling system 6 includes a circulation passage 60 that communicates with the refrigerant passage 13 formed inside the stack 1, a refrigerant pump 61 (refrigerant conveyance source) that circulates refrigerant (cooling liquid such as cooling water) in the circulation passage 60, and the like. And a temperature sensor 62 that is provided in the circulation passage 60 and detects the temperature of the refrigerant in the circulation passage 60, and a heater 63 (power consumption element) that heats the refrigerant in the circulation passage 60. When the stack 1 is activated, the control device 7 can preheat the stack 1 by causing the heater 63 to generate heat and preheating the refrigerant in the circulation passage 60. The temperature of the refrigerant in the circulation passage 60 substantially corresponds to the operating temperature of the stack 1. Further, the cooling system 6 includes a branching path 65 branched from the circulation passage 60, a refrigerant processing unit 66, a flow rate sensor for detecting a flow rate flowing through the refrigerant processing unit 66, or a liquid level sensor for detecting a liquid level in the refrigerant processing unit 66. And a sensor 67 formed by The refrigerant treatment material 66a of the refrigerant treatment unit 66 is formed of an ion exchange resin or the like so as to reduce impurities contained in the refrigerant (for example, a cooling liquid such as cooling water) and improve the electric insulation of the refrigerant. . When the refrigerant pump 61 is activated, the refrigerant circulates in the circulation passage 60 and the refrigerant passage 13 of the stack 1, and heat of the stack 1 can be taken away. At this time, the electrical insulation of the refrigerant is enhanced by the refrigerant treatment material 66a.

  A hot water storage system 8 is provided. The hot water storage system 8 includes a hot water storage passage 80, a heat exchanger 81 that exchanges heat between the circulation passage 60 and the hot water storage passage 80, a pump 82 (a hot water supply source) that transfers water in the hot water storage passage 80, and the hot water storage passage 80. It has a hot water tank 85 that is connected, and a replenishment passage 84 that replenishes replenished water (for example, tap water) when the water in the hot water tank 85 is insufficient. When the pump 82 operates, the water in the hot water storage passage 80 is conveyed, the thermal energy of the circulation passage 60 is transmitted to the hot water storage passage 80, the water temperature of the hot water storage passage 80 rises, and consequently the thermal energy of the hot water storage tank 85 rises.

  During the power generation operation of the stack 1, the control device 7 operates the fuel pump 23 with the fuel valve 22 opened while the stack 1 and the power load are electrically connected, and the gaseous fuel of the fuel raw material source 21 is operated. The raw material is supplied to the reforming unit 25 of the reformer 24, and the water pump 37 is further operated, and the reforming water in the tank 35 is steamed by the evaporation unit 39 and then supplied to the reforming unit 25. As a result, the fuel material is steam reformed in the reforming unit 25 to become a gaseous fuel (hydrogen-containing gas). After the excess water is removed by the condenser 27, the fuel is supplied to the fuel electrode 10 of the stack 1 from the open inlet valve 28. Further, the control device 7 operates the oxidant pump 53 with the valves 54, 57, and 59 opened, passes the oxidant gas (air) through the filter 51, and humidifies the humidification path 50 a of the humidifier 50. After that, the oxidant electrode 11 of the stack 1 is supplied to the inlet. As a result, the stack 1 performs a power generation operation.

  However, since the composition of the fuel reformed by the reformer 24 may not be sufficiently stable at the beginning of startup, the control device 7 closes the bypass valve 45 with the inlet valve 28 and the outlet valve 30 closed. , The fuel flows into the bypass passage 46 and does not flow into the fuel electrode 10 of the stack 1. When the composition of the reformed fuel becomes stable, the control device 7 opens the inlet valve 28 and the outlet valve 30, closes the pass valve 45, and supplies the fuel to the fuel electrode 10 of the stack 1 instead of the bypass passage 45.

  Since the fuel off-gas discharged from the outlet of the fuel electrode 10 of the stack 1 has a combustible component, the fuel off-gas flows through the fuel discharge passage 29, lowers the moisture by the condenser 29 h, and then is discharged to the burner 26 and burned. . On the other hand, the oxidant off-gas discharged from the outlet of the oxidant electrode 11 of the stack 1 flows from the oxidant discharge path 55 to the moisture absorption path 50 b of the humidifier 50. By controlling the bypass valve 57, it is possible to variably control the ratio between the flow rate of the oxidant off-gas flowing through the moisture absorption path 50b of the humidifier 50 and the flow rate of the oxidant off-gas flowing through the bypass circuit 56. Each device and each element of the system described above are accommodated in the accommodation chamber 501 of the housing 500.

  As shown in FIG. 2, the condensers 27, 43h, 29h, and 55h are a kind of heat exchanger, and cool water vapor contained in the gas that passes through these condensers 27, 43h, 29h, and 55h. To condense. A heat exchange passage 520 through which a heat exchange medium (cooling water) for cooling the condensers 27, 43h, 29h, and 55h flows is provided together with a pump 521 (heat exchange medium conveyance source). As a result, the heat exchange medium flowing through the heat exchange passage 520 collects exhaust heat generated in the system, and transmits the exhaust heat to the water in the hot water storage passage 80 via the heat exchanger 87. Thereby, the thermal energy accumulated as hot water in the hot water tank 85 is increased.

  FIG. 3 shows a state in which the system is installed outside the building 600 (facility). The casing 500 of the system is installed together with the hot water storage tank 85 in a state of being adjacent to the building 600 outside the building 600. A remote-control-type first operation display unit 700 is provided in the room of the building 600 (facility) so that a user existing in the room of the building 600 can operate the system. The first operation display unit 700 simply sets the basic operation related to the power generation operation of the system, and simply displays the basic information related to the power generation operation of the system. Specifically, as shown in FIG. 4, the first operation display unit 700 communicates with the hot water tank control unit, and a switch 701 for starting the system, a switch 702 for stopping the power generation operation of the system, and the user A switch 703 as a timer setting unit for setting a system operation start time, a system operation stop time, and the like, a display unit 706 for displaying the generated power of the system, and an amount of power purchased by the system from a commercial power source It has a display unit 707 and a display unit 708 for displaying (relatively displaying) the amount of hot water in the hot water tank 85.

  FIG. 5 shows the second operation display unit 800 provided in the casing 500 so that it can be exposed from the outside of the building 600, that is, it can be exposed from the outside of the casing 500 of the system. The second operation display unit 800 is separated from the inverter 48, and sets detailed operations related to the power generation operation of the system and displays detailed information related to the power generation operation of the system. The second operation display unit 800 includes a lamp 801 that is lit when the power is turned on, a lamp 802 that is lit during startup, a lamp 803 that is lit during power generation, a lamp 804 that is lit during a stop operation, and a lamp that is lit during automatic operation. A lamp 805 that turns on when an error occurs, a first display portion 811 formed of a 7-segment LED, a second display portion 812 formed of a 7-segment LED, and a first display portion 812 formed of a 7-segment LED. 3 display part 813, 4th display part 814 formed with 7 segment LED, rotary operation selection switch 821 which can select 0 mode-5 mode, and the mode corresponding to the number of 0-9 can be selected A rotary number selection switch 822 and a rotary display selection switch 823 for selecting contents to be displayed on the first display portion 811 to the fourth display portion 814. , Execution switch 824 for executing processing in each mode, stop switch 825 for stopping processing in each mode, forced power generation switch 826, and setting of operation specified values when grid connection with commercial power supply 49 is established The first setting switch 831 to the fourth setting switch 834 and the PC connection port 836 for connecting the control device 7 to the personal computer.

  The second operation display unit 800 includes a time display unit 818 formed by a 7-segment LED that displays the time required for executing each mode, and a 7-segment display that displays the remaining time when each mode is executed. And a remaining time display portion 819 formed of LEDs. Note that the switches 821 to 823 are not limited to the rotary type, and may be a slide type. Instead of the above-described 7-segment LED, a display panel such as a liquid crystal panel may be used.

  The operation selection switch 821 has an installation mode (0 mode) used when installing the system, an automatic operation mode (1 mode) for automatically operating the system, and a maintenance mode (2 mode) for maintaining the system when there is no power generation. A standby mode (3 mode) for waiting the system while generating power and a PC operation mode (4 mode) for connecting to a personal computer can be selected.

  As shown in FIG. 7, the control device 7 has an input processing circuit 70, a CPU 71 having a timer function, memories 72 and 73, and an output processing circuit 74, and valves 22, 25v, 28, and 30. 40a, 90, 54, 57, 59, pumps 23, 37, 42, 61, 53, 82, 521, lamps 801, 802, 803, 804, 805, 806, display units 811, 812, 813, 814, alarms The unit 850, the time display unit 818, the remaining time display unit 819, the display units 706, 707, and 708 are controlled. The alarm device 850 may be an acoustic alarm, a visual alarm, an optical alarm, or the like. In addition, the control device 7 includes signals from the sensors 25s, 10s, 11s, 52s, 67, 93, and 94, and switches 701, 702, 703, 821, 822, 823, 824, 825, 826, and 831, which will be described later. Signals such as 832, 833, and 834 are received.

  FIG. 8 shows a flowchart of the reading process executed by the control device 7. The control device 7 reads information set by each switch of the first operation display unit 700 (step S102), and then reads information set by each switch of the second operation display unit 800 (step S104). ). The control device 7 compares and determines whether the information set on the first operation display unit 700 and the information set on the second operation display unit 800 collide (step S106). If there is a collision, the control device 7 prioritizes the operation based on the second operation display unit 800 over the operation based on the first operation display unit 700 and invalidates the operation based on the first operation display unit 700 ( Step S108), and stored in a predetermined area of the memories 72 and 73 (Step S110).

Now, according to this embodiment, the following parts are provided.
(1) The second operation display unit 800 is provided with a power generation information display unit for displaying information regarding the reforming operation of the reformer 24 as information regarding the power generation operation of the system. The power generation information display unit includes a first display unit 811 to a fourth display unit 814.
(2) The power generation mode operation unit for executing the mode related to the power generation operation of the system is configured by a combination of switches in the second operation display unit 800.
(3) The heat exchange medium exchange mode operation unit for executing a mode for confirming whether or not the system normally operates after exchanging the heat exchange medium in the heat exchange passage 520 is a switch in the second operation display unit 800. It is composed of a combination of
(4) A desulfurization material replacement mode operation unit for executing a mode for confirming whether or not the system normally operates after replacing the desulfurization material 97a is configured by a combination of switches in the second operation display unit 800. Yes.
(5) A mode for confirming whether or not the system operates normally after exchanging the first water purification material 91a of the first water purification unit 91 and the second water purification material 92a of the second water purification unit 92 is executed. The water refining material replacement mode operation unit for this is configured by a combination of switches in the second operation display unit 800.
(6) A refrigerant replacement mode operation unit for executing a mode for confirming whether or not the system normally operates after replacing the refrigerant in the circulation passage 60 is configured by a combination of switches in the second operation display unit 800. ing.
(7) The heat exchange medium exchange mode operation unit for executing a mode for confirming whether or not the system normally operates after exchanging the heat exchange medium in the heat exchange passage 520 is a switch in the second operation display unit 800. It is composed of a combination of
(8) Confirming whether or not the system operates normally after replacing the replaceable refrigerant treatment material 66a that performs the insulation process to increase the purity of the refrigerant in the refrigerant circulation passage 60 and increase the electric insulation of the refrigerant. The refrigerant treatment material replacement mode operation unit for executing the mode is configured by a combination of switches in the second operation display unit 800.
(9) Purifying material replacement for executing a mode for confirming whether or not the system normally operates after the oxidant gas supplied to the stack is cleaned and the replaceable filter 51 (purifying material) is replaced. The mode operation unit is configured by a combination of switches in the second operation display unit 800.
(10) After detecting or determining that flooding has occurred in the stack 1, purge gas (air or nitrogen gas) is supplied into the oxidant electrode 11 of the stack 1, and the oxidant electrode 11 of the stack 1 is supplied. A purge mode operation unit for executing a mode in which the excess water inside is discharged to the outside of the oxidant electrode 11 is configured by a combination of switches in the second operation display unit 800.

  Further explanation will be given. The combination of the operation selection switch 821, the number selection switch 822, and the display selection switch 823 in the second operation display unit 800 includes the above-described power generation mode operation unit, heat exchange medium exchange mode operation unit, desulfurization as described below. A material exchange mode operation unit, a water purification material exchange mode operation unit, a refrigerant exchange mode operation unit, a refrigerant treatment material exchange mode operation unit, a purification material exchange mode operation unit, and a purge mode operation unit are configured.

(A) When the maintenance person has selected “0 mode” of the operation selection switch 821 (a-1) Executed when the maintenance person has selected any of 0 to 9 of the number selection switch 822 When the switch 824 is operated, the control device 7 automatically executes a system test operation mode (a mode related to power generation operation). Therefore, this switch combination constitutes a test run mode operation section (power generation mode operation section, single power generation mode operation section) of the system. At this time, the inverter 48 is disconnected from the commercial power source 49. That is, as described above, the control device 7 operates the fuel pump 23 with the fuel valve 22 opened, and supplies the fuel material of the fuel material source 21 to the reforming unit 25 of the reformer 24. Then, the water pump 37 is operated, and the water for reforming in the water tank is vaporized by the evaporation unit 39 and then supplied to the reforming unit 25. As a result, the fuel material is steam reformed in the reforming unit 25 to become a fuel containing hydrogen. The fuel is supplied to the anode 10 of the stack 1. Further, the control device 7 operates the oxidant pump 53 with the valves 54, 57, 59 opened, humidifies the oxidant gas in the humidification path 50 a of the humidifier 50, and then the oxidant electrode of the stack 1. 11 inlet. As a result, the stack 1 automatically performs a power generation operation.

  (A-2) In a state where the stack 1 and the commercial power source 4949 are connected via the circuit breaker 47 and the inverter 48 and are connected to the grid, the maintenance person selects any one of 0 to 9 of the number selection switch 822 When the forced power generation switch 826 is operated, the control device 7 automatically executes the system interconnection operation mode (mode related to the power generation operation) of the system, and the stack 1 automatically performs the power generation operation. Therefore, this switch combination constitutes a system interconnection automatic operation mode operation section (power generation mode operation section) of the system.

  (A-3) When the maintenance person selects any one of 0 to 9 of the number selection switch 822, when the execution switch 826 is operated, the control device 7 causes the system to operate automatically (mode related to power generation operation). Automatically starts. Therefore, this switch combination constitutes an automatic operation mode operation section (power generation mode operation section, interconnected power generation mode operation section) of the system. At this time, the inverter 48 is connected to the commercial power source 49. That is, the control device 7 operates the fuel pump 23 with the fuel valve 22 opened, supplies the fuel material of the fuel material source 21 to the reforming unit 25 of the reformer 24, and further operates the water pump 37. Then, the water for reforming in the water tank is steamed by the evaporation unit 39 and then supplied to the reforming unit 25. As a result, the fuel material is steam reformed in the reforming unit 25 to become a gaseous fuel (hydrogen-containing gas). After the excess water is removed by the condenser 27, the fuel is supplied to the fuel electrode 10 of the stack 1 from the open inlet valve 28. Further, the control device 7 operates the oxidant pump 53 with the inlet valve 54 opened to humidify the oxidant gas in the humidification path 50 a of the humidifier 50, and then the inlet of the oxidant electrode 11 of the stack 1. To supply. As a result, the stack 1 performs a power generation operation.

(B) When the maintenance person has selected “2 mode” of the operation selection switch 821 (b-1) When the maintenance person replaces the first water purification unit 91 and the second water purification unit 92, the maintenance person When the execution switch 824 is operated after selecting 0 of the number selection switch 822, the control device 7 executes the water purification material replacement mode. Therefore, this switch combination constitutes a water purification material exchange mode operation section. That is, when the first water purification unit 91 and the second water purification unit 92 are exchanged, the control device 7 opens the valve 90 and passes the raw water through the first water purification unit 91 and the second water purification unit 92. Supply to tank 35. The amount of water supplied to the tank 35 is detected by the sensor 93. When a predetermined amount of water is not supplied to the tank 35 within a predetermined time from the opening time of the valve 90, a water leak is predicted, and the control device 7 sends an alarm signal to the alarm device 850 as a replacement failure of the water purification units 91 and 92. Output. If the replacement is defective, the maintenance person preferably performs the replacement work again.

  (B-2) That is, when the maintenance person replaces the refrigerant processing material 66a of the branch path 65, when the maintenance person selects the number selection switch 822 and then operates the execution switch 824, the control device 7 performs the refrigerant processing. Automatically execute the material change mode. Therefore, this switch combination constitutes a refrigerant treatment material exchange mode operation unit. In this mode, the control device 7 operates the pump 61 to circulate the refrigerant (cooling liquid such as cooling water) in the circulation passage 60. The circulating flow rate of the refrigerant in the refrigerant processing unit 66 is detected by the sensor 67. When the predetermined circulating flow rate is not reached within a predetermined time from the operation start time of the pump 61, the control device 7 outputs an alarm signal to the alarm device 850 as a replacement failure of the refrigerant processing material 66a. If the replacement is defective, the maintenance person preferably performs the replacement work again.

  (B-3) When the maintenance person replaces the desulfurization material 97a of the desulfurizer 97, when the execution switch 824 is operated after selecting the number selection switch 822, the control device 7 automatically sets the desulfurization material replacement mode. Execute. Therefore, this switch combination constitutes a desulfurization material exchange mode operation unit. That is, the control device 7 opens the valve 22 that is the inlet side valve of the reforming unit 25 and operates the fuel pump 23 in a state where the valve 25v or the valve 28 that is the outlet side valve of the reforming unit 25 is closed. Then, a gaseous fuel material is supplied from the fuel material source 26 into the reforming unit 25, the inside of the reforming unit 25 is set to a high pressure, and then the valve 22 is closed to make the inside of the reforming unit 25 a sealed space. . If there is a defective replacement of the desulfurizer 97, the pressure in the reforming unit 25 forming the sealed space is reduced, but the pressure drop is detected by the sensor 25s. In addition, when the pressure in the reforming unit 25 decreases within a predetermined time from the closing time of the valve 22, the control device 7 outputs an alarm signal to the alarm device 850 as a replacement failure of the desulfurizer 97. If the replacement is defective, the maintenance person preferably performs the replacement work again.

  (B-4) When the maintenance person replaces the refrigerant (for example, cooling liquid) in the circulation passage 60 for cooling the stack, the maintenance person operates the execution switch 824 after selecting the number selection switch 822, and the control device 7 automatically executes the refrigerant replacement mode. Therefore, this switch combination constitutes a refrigerant exchange mode operation unit. That is, when the refrigerant in the circulation passage 60 is replaced, the control device 7 operates the pump 61 to circulate the refrigerant in the circulation passage 60. The circulating flow rate of the refrigerant flowing through the branch path 65 is detected by the sensor 67. When the predetermined circulation flow rate is not reached within a predetermined time from the operation start time of the pump 61, the control device 7 outputs an alarm signal to the alarm device 850 as a refrigerant replacement failure. If the replacement is defective, the maintenance person preferably performs the replacement work again.

  (B-5) When the maintenance person replaces the heat exchange medium (cooling water) in the heat exchange passage 520, if the maintenance person operates the execution switch 824 after selecting the number selection switch 822, the system operates normally. The control device 7 automatically executes a heat exchange medium exchange mode for confirming whether or not to do so. Therefore, this switch combination constitutes a heat exchange medium exchange mode operation unit. That is, when the heat exchange medium (coolant such as cooling water) in the heat exchange passage 520 is exchanged, the control device 7 operates the pump 521 to circulate the heat exchange medium through the heat exchange passage 520. If there is a defective exchange of the heat exchange medium, the flow rate of the heat exchange medium flowing per unit time becomes small and is detected by the sensor 520s. When the circulating flow rate of the heat exchange medium is small within a predetermined time from the operation time of the pump 521, the control device 7 outputs an alarm signal to the alarm device 850 as a heat exchange medium replacement failure. If the replacement is defective, the maintenance person preferably performs the replacement work again.

  (B-6) When the voltage of the stack 1 is excessively decreased by the voltage sensor 1s and it is detected or determined that flooding has occurred in the stack 1, the maintenance person sets the number selection switch 822 to 5 When the execution switch 824 is operated after the selection, the control device 7 supplies the purge gas to the inside of the oxidant electrode 11 of the stack 1, and the excess water inside the oxidant electrode 11 of the stack 1 is supplied to the oxidant electrode 11. A purge mode for discharging to the outside is executed. Therefore, the above switch combination constitutes a purge mode operation unit. That is, when flooding occurs in the stack 1, the control device 7 opens the valve 54, and the oxidant pump 53 is activated to use the oxidant gas (air) as the purge gas and the oxidant electrode 11 of the stack 1. The liquid-phase surplus water remaining inside the oxidant electrode 11 of the stack 1 is discharged to the outside of the oxidant electrode 11.

  (B-7) When the maintenance operator operates the execution switch 824 after selecting the number selection switch 822, the control device 7 automatically executes the air density confirmation mode for confirming the air density inside the stack 1. To do. This switch combination constitutes an airtightness confirmation mode operation unit. That is, the control device 7 supplies the oxidant gas (air) to the inside of the oxidant electrode 11 of the stack 1 by the operation of the oxidant pump 53 with the valve 54 opened. The inlet-side valve 54 and the outlet-side valve 57 of the oxidant electrode 11 are closed to make the oxidant electrode 11 a sealed space. The pressure drop inside the oxidant electrode 11 is detected by the sensor 11s. When a pressure drop is detected within a predetermined time from the closing time of the valves 59 and 57, the control device 7 outputs an alarm signal to the alarm device 850 as an airtight alarm of the oxidant electrode 11 of the stack 1. If the replacement is defective, it is preferable that the maintenance person identify the leaked portion and perform the correction again after correction.

  Similarly, the control device 7 operates the fuel pump 23 with the valves 22, 25 v, 28, 30 opened, supplies fuel material into the fuel electrode 10 of the stack 1, and then the valves 28, 30. And the fuel electrode 10 is used as a sealed space. The pressure drop inside the fuel electrode 10 is detected by the sensor 10s. Note that when a pressure drop is detected within a predetermined time from the time when the fuel electrode 10 is closed, the control device 7 outputs an alarm signal to the alarm device 850 as an airtight alarm of the fuel electrode 10 of the stack 1.

  (B-8) When the maintenance person replaces the filter 51 (purifying material), the maintenance person or the like operates the execution switch 824 after selecting the number selection switch 822 8, and the control device 7 supplies the stack 1 to the stack 1. A mode for automatically confirming whether or not the system operates normally after exchanging the replaceable filter 51 (cleaning material) is performed automatically. Therefore, the switch combination constitutes a purification material replacement mode operation unit. That is, the control device 7 supplies the oxidant gas (air) to the inside of the oxidant electrode 11 of the stack 1 through the filter 51 by the operation of the oxidant pump 53. The flow rate of the oxidant gas that has passed through the filter 51 is detected by the sensor 52s. When the oxidant gas does not flow at a predetermined flow rate within a predetermined time from the operation start time of the oxidant pump 53, the control device 7 outputs an alarm signal to the alarm device 850 as a filter replacement failure. If the replacement is defective, the maintenance person preferably performs the replacement work again.

  (B-9) When the maintenance person or the like selects any one of 0 to 8 of the number selection switch 822, when the forced power generation switch 826 is operated, the control device 7 forcibly operates the stack 1 to generate power. The mode (mode related to power generation operation) is automatically executed. Therefore, the combination of the switches constitutes a forced operation mode operation unit (power generation mode operation unit). That is, the control device 7 operates the fuel pump 23 with the valves 22, 25 v, 28, 30 opened, supplies the fuel material of the fuel material source 21 to the reforming unit 25 of the reformer 24, and Then, the water pump 37 is operated, and the water for reforming in the tank 35 is vaporized by the evaporation unit 39 and then supplied to the reforming unit 25. As a result, the fuel material is steam reformed in the reforming unit 25 to become a gaseous fuel (hydrogen-containing gas). After the excess water is removed by the condenser 27, the fuel is supplied to the fuel electrode 10 of the stack 1 from the open inlet valve 28. Further, the control device 7 operates the oxidant pump 53 with the inlet valve 54 opened to humidify the oxidant gas in the humidification path 50 a of the humidifier 50, and then the inlet of the oxidant electrode 11 of the stack 1. To supply. As a result, the stack 1 performs a power generation operation.

(C) When the maintenance person selects “3 mode” of the operation selection switch 821 (c-1) When the maintenance person selects any of 0 to 9 of the number selection switch 822, the execution switch 824 When the is operated, the control device 7 automatically executes a standby mode (mode related to power generation operation) in which the system stands by in a power generation stop state. Therefore, the switch combination constitutes a standby mode operation unit (power generation mode operation unit). That is, the control device 7 stops the fuel pump 23 and the oxidant pump 53. Close the valve if necessary.

(D) When the maintenance person selects “4 mode” of the operation selection switch 821 (d-1) When the maintenance person selects any of 0 to 9 of the number selection switch 822, the execution switch 824 Is operated, the control device 7 can execute a PC operation mode (mode related to power generation operation) in which the system can be operated by a personal computer. Therefore, this switch combination constitutes a PC operation mode operation section (power generation mode operation section).

(E) When the maintenance person selects any of “0 mode” to “4 mode” of the operation selection switch 821 (e-1) Any of 0 to 9 of the number selection switch 822 When the stop switch 825 is operated when selecting either of these, the control device 7 executes a power generation inhibition mode in which the operation of the system is stopped and power generation is prohibited. Therefore, this switch combination constitutes a power generation prohibition mode operation unit. That is, the control device 7 stops the fuel pump 23 and the oxidant pump 53. Close the valve if necessary. When the cancel switch (not shown) is operated, the power generation prohibition mode is canceled.

  Here, when the execution switch 824, the forced power generation switch 826, and the stop switch 825 are operated once, the operation content is displayed in a blinking state on the first display portion 811 to the second display portion 812. If the maintenance person confirms the display content and then OK, the controller 7 executes the mode by operating the same switch again.

  At the time of maintenance, the maintenance person may perform only the mode corresponding to the replacement part corresponding to the maintenance among a plurality of modes, and confirm whether the mode operates normally. Alternatively, the maintenance person may perform a mode other than the mode corresponding to the replacement part corresponding to the maintenance among the plurality of modes. When implementing a plurality of modes, the plurality of modes may be implemented collectively, or the plurality of modes may be implemented sequentially in time. As a result, it can be confirmed whether or not the operation of each mode operates normally. Furthermore, after confirming whether the operation of each mode is normally performed, the maintenance person may make a trial operation of the system to actually generate power and determine whether the power generation is normal.

(About display)
When the maintenance person operates the display selection switch 823, the contents displayed using the first display portion 811 to the fourth display portion 814 are the display form 1 to the display form 9 shown below. Here, the display mode 1 displays the current state of the system. That is, an installation mode in which the system is installed, an automatic mode in which the system is automatically operated, and a maintenance mode in which the system is in a maintenance state. A standby mode in which the system is on standby, and a PC operation mode that can be operated on a system personal computer. The display mode 1 displays these modes as alphabets and / or numerical values.

  In the display mode 2, the magnitude of the received power from the commercial power supply 49 is displayed as a numerical value *** W. In the display mode 3, the magnitude of the generated power of the stack 1 is displayed as a numerical value *** W. Here, * means a number displayed on the first display unit 811 to the fourth display unit 814. In the display form 4, the magnitude of the output of the heater 63 is displayed as a numerical value *** W. In the display form 5, the magnitude of the reconnection prevention time is displayed as a number counted down from a reference time (for example, 300 seconds). The reconnection prevention time means the time from when the inverter 48 is disconnected from the commercial power supply 49 until the next connection. The display form 6 displays an alarm code and an error code. The display form 7 displays an error history. In the display mode 8, the first display unit 811 to the fourth display unit 814 display the integrated operation time of the system as ***** time. In display mode 9, the first display unit 811 to the fourth display unit 814 display the total number of activations of the system as *** times. The display mode 10 displays the operation time after the previous maintenance as **** time. * Is a number displayed on the first display unit 811 to the fourth display unit 814.

  6 (A) to 6 (D) show first setting switch 831 to fourth setting switch 834 that are used for setting the operation specified value when the system is interconnected with commercial power supply 49. The first setting switch 831 is configured by arranging a plurality (eight) of dip switches 831a to 831h in parallel. A single dip switch can be set in two stages (on and off). Therefore, two dip switches can set four stages. The second setting switch 832 is configured by arranging a plurality (eight) of dip switches 832a to 832h in parallel. The third setting switch 833 is configured by arranging a plurality (eight) of dip switches 833a to 833h in parallel. The fourth setting switch 834 is configured by arranging a plurality (eight) of dip switches 834a to 834h in parallel.

  The first setting switch 831 is for setting the system voltage of the commercial power supply 49. The dip switches 831a and 831b of the first setting switch 831 can set the system overvoltage operation value in four stages. When the system voltage of the commercial power supply 49 is higher than the system overvoltage operation value, the inverter 48 equipped with a control unit having a microcomputer disconnects the system from the commercial power supply 49. The dip switches 831c and 831d of the first setting switch 831 can set the system overvoltage operation time in four stages. When the system voltage of the commercial power supply 49 is higher than the system overvoltage operation value, the inverter 48 disconnects the system from the commercial power supply 49, but the inverter 48 detects that the system voltage of the commercial power supply 49 is higher than the system overvoltage operation value. Then, the time from the commercial power supply 49 to the disconnection of the system is called the system overvoltage operation time. The dip switches 831e and 831f of the first setting switch 831 can set the system undervoltage operating value in four stages. When the system voltage of the commercial power supply 49 is lower than the system undervoltage operation value, the inverter 48 disconnects the system from the commercial power supply 49. The DIP switches 831g and 831h of the first setting switch 831 can set the system undervoltage operating time in four stages. When the system voltage of the commercial power supply 49 is lower than the system undervoltage operation value, the inverter 48 disconnects the system from the commercial power supply 49, but the inverter 48 indicates that the system voltage of the commercial power supply 49 is lower than the system undervoltage operation value. The time from the detection until the system is disconnected from the commercial power supply 49 is referred to as the system undervoltage operation time.

  The second setting switch 832 is for setting the frequency of the system frequency (the frequency of the commercial power supply 49). The DIP switches 832a and 832b of the second setting switch 832 can set the frequency increasing operation value in four stages. When the system frequency fluctuates above the frequency increase operation value, the inverter 48 disconnects the system from the commercial power source 49. The DIP switches 832c and 832d of the second setting switch 832 can set the frequency increasing operation time in four stages. When the system frequency fluctuates above the frequency increase operation value, the inverter 48 disconnects the system from the commercial power supply 49, but after the inverter 48 detects that the system frequency fluctuates above the frequency increase operation value, the system is commercialized. The time until the power supply 49 is disconnected is referred to as the frequency increasing operation time. The DIP switches 832e and 832f of the second setting switch 832 can set the frequency lowering operation value in four stages. When the system frequency fluctuates below the frequency lowering operation value, the inverter 48 disconnects the system from the commercial power source 49.

  The DIP switches 832g and 832h of the second setting switch 832 can set the frequency decreasing operation time in four stages. When the system frequency fluctuates below the frequency lowering operation value, the inverter 48 disconnects the system from the commercial power supply 49, but after the inverter 48 detects that the system frequency fluctuates to the frequency lowering operation value, The time from 49 to release is referred to as the frequency lowering operation time.

  The DIP switches 833a and 833b of the third setting switch 833 can set the system abnormality recovery timer in four stages. The system abnormality recovery timer refers to the time from when the system is disconnected from the commercial power supply 49 until it is reconnected. The dip switches 833c and 833d of the third setting switch 833 can set the phase jump operation value in four stages. When the voltage and current phases of the commercial power supply 49 are shifted by a phase jump operation value or more, the inverter 48 disconnects the system from the commercial power supply 49. The dip switches 833e and 833f of the third setting switch 833 can set the phase jump operation time in four stages. In the phase jump operation time, when the voltage and current phases of the commercial power supply 49 are shifted by the phase jump operation value or more, the inverter 48 detects that the voltage and current phases of the commercial power supply 49 are shifted by the phase jump operation value or more. To the time until the inverter 48 disconnects the system from the commercial power supply 49. The dip switches 833g and 833h of the third setting switch 833 can set the presence or absence of the reverse tide setting for setting the reverse tide to be supplied from the system to the commercial power supply 49.

  FIG. 9 is a flowchart showing the mode display time executed by the control device 7 during maintenance. The processing time required for each mode described above is stored in a predetermined area of the memory 73 in advance. The control device 7 reads the time required for the corresponding mode from the memory 73 (step S202). The control device 7 determines whether or not the mode has been started (step S204). If the mode has been started (YES in step S204), the mode timer is started (step S206), and the processing time required for that mode is displayed on the display unit 818 (step S208), and the remaining time is displayed. Calculation is performed (step S210). The control device 7 displays the calculated remaining time on the remaining time display unit 819 (step S212). The control device 7 determines whether or not the mode has ended (step S214). If the mode has ended, the control device 7 executes an end process for erasing the time display (step S216), and returns to the main routine. If the mode has not ended, the control device 7 calculates the remaining time (step S210). The control device 7 displays the calculated remaining time on the second time display unit 819 (step S212).

  10 and 11 show a breaker 47 for cutting off the electrical connection between the commercial power supply 49 and the stack 1. As shown in FIGS. 10 and 11, the breaker 47 having the operation unit 47 c and the second operation display unit 800 are exposed on the side wall surface 505 of the housing 500 from the outside of the building 600 by others. Adjacent to each other. A cover 506 having a transparent, translucent, or opening-like window 505 that allows the inside to be visually recognized is detachably attached to the housing 500 by a screw 509 (attachment tool). The breaker 47 and the second operation display unit 800 are covered with a cover 506. If the screw 509 is loosened and the cover 506 is detached, the breaker 47 and the second operation display unit 800 can be easily operated. Since the breaker 47 is often shut off during maintenance, if the breaker 47 and the second operation display unit 800 are provided next to each other, workability is good during maintenance, grid interconnection connection work, etc., and work time is shortened. Can contribute to Note that the cover 506 may be detachably attached to the housing 500 by a snap engagement portion instead of the screw 509.

  FIG. 12 is a cross-sectional view of the housing 500 cut in the horizontal direction. As shown in FIG. 12, the accommodation chamber 501 of the housing 500 is partitioned by a partition wall 504 into a main chamber 502 and a maintenance chamber 503. The main chamber 502 accommodates the reformer 24 that becomes high temperature together with the stack 1. The maintenance chamber 503 detachably accommodates a first water purification unit 91, a second water purification unit 92, a refrigerant processing unit 66, and a desulfurizer 97 that function as maintenance parts. When the side plate 505 constituting the housing 500 is removed, the maintenance chamber 503 is exposed to the outside. For this reason, the ease of replacement | exchange of the 1st water refinement | purification part 91, the 2nd water refinement | purification part 92, the refrigerant | coolant process part 66, and the desulfurizer 97 increases.

  The breaker 47 and the second operation display unit 800 described above can be exposed from the outside of the building 600 in the maintenance room 503 of the casing 500 as shown in FIG. Since it is disposed, it is difficult to receive heat from the reformer 24 that becomes high temperature. Furthermore, since the stack 1 is arranged between the breaker 47 and the second operation display unit 800 and the reformer 24, the breaker 47 and the second operation display unit 800 are less likely to receive heat from the reformer 24. Therefore, the protection with respect to the breaker 47 and the 2nd operation display part 800 is improved.

  If the first water purification unit 91, the second water purification unit 92, the refrigerant processing unit 66, and the desulfurizer 97 are at high temperatures, it is not preferable from the viewpoint of high performance and long life. That is, the first water purification material 91a of the first water purification unit 91, the second water purification material 92a of the second water purification unit 92, and the refrigerant processing material 66a of the refrigerant processing unit 66 are made of a resin such as an ion exchange resin as a base material. And often. When this resin is affected by heat, there is a possibility that sufficient durability cannot be obtained. If the desulfurization material 97a is also at a high temperature, the performance of the desulfurization catalyst may be deteriorated. Therefore, the maintenance chamber 503 is partitioned by the partition wall 504 to enhance heat insulation and is kept away from the reformer 24. Therefore, the maintenance chamber 503 is less susceptible to the heat of the reformer 24 and the stack 1. Yes. As described above, the first water purification unit 91, the second water purification unit 92, the refrigerant treatment unit 66, and the desulfurizer 97 are detachably accommodated in the maintenance chamber 503 so as to be away from the reformer 24 that can be a heat source. Yes.

  The inverter 48 is housed in an inverter box 48i, is an assembly of electric devices that generate heat, has a large size, and has heat dissipation properties when energized. It is preferable that the water purification unit 92, the refrigerant processing unit 66, and the desulfurizer 97 be as far away as possible. In this regard, according to the present embodiment, as shown in FIG. 12, the inverter box 48 i that houses the inverter 48 is provided between the reformer 24 and the partition wall 504. Here, the second operation display unit 800 disposed on the side wall surface 505 side of the housing 500 is separated from the inverter 48 in terms of distance. Therefore, the degree of freedom in selecting the position where the inverter box 48i that accommodates the inverter 48 is assembled can be increased. For this reason, as shown in FIG. 12, the inverter box 48i having heat dissipation is provided in the main chamber of the casing 500 while the second operation display section 800 is attached to the outside of the side wall surface 505 of the casing 500 to improve the maintenance workability. In 502, by accommodating between the partition wall 504 and the reformer 24, it is kept away from the maintenance room 503 as much as possible. Further, the air passage 41 is communicated with the oxidant supply passage 52 through the branch portion 41m. Further, an inverter box 48 i is provided in the air passage 41. In this case, when the pump 42 is actuated, the air outside the casing 500 is sucked into the oxidant supply passage 52 through the filter 51 and further passes through the air passage 41 and the inverter box 48i to be supplied to the burner 26 as combustion air. Supplied. In this case, the inverter 48 in the inverter box 48i can be cooled with air, and the air supplied to the burner 26 can be preheated. Such a function is achieved by separating the second operation display unit 800 for maintenance from the inverter 48.

  As described above, according to the present embodiment, the first operation display unit 700 is provided in the room of the building 600 so that a user existing in the room of the building 600 can operate. On the other hand, the second operation display unit 800 is provided in the casing 500 so as to be exposed from the outside of the building 600 (facility), that is, from the outside of the casing 500 of the system. During normal times, a user in the building 600 can operate the first operation display unit 700 to set the power generation operation of the system. When there is no user in the room, when the user's body in the room is out of order and cannot be operated, when the building 600 is locked, etc., whether it is an emergency or not an emergency, a maintenance person, etc. However, without entering the room of the building 600, each mode of the power generation operation of the system can be arbitrarily operated by the second operation display unit 800 provided outside the building 600.

  According to the present embodiment, as described above, the second operation display unit 800 invalidates the operation based on the first operation display unit 700 and changes the operation based on the second operation display unit 800 to the first operation display unit 700. Prioritize operations based on. Accordingly, even when there is an emergency such as when the user is absent, when the user's body is out of order, or when the building 600 is locked, the maintenance person or the like enters the room of the building 600. At least, the power generation operation of the system can be operated with the second operation display unit 800.

  According to the present embodiment, the operation content by the second operation display unit 800 includes the operation content that cannot be operated by the first operation display unit 700. The user may not be familiar with the detailed structure and functions of the system. Therefore, the operation content that can be operated on the first operation display unit 700 is a basic and simple operation of the system. On the other hand, the operation content that can be operated on the second operation display unit 800 is a more detailed operation of the system. For this reason, since the user operated the second operation display unit 800 by mistake, it is possible to avoid an unexpected operation in the system. Therefore, the display content by the second operation display unit 800 includes display content that is not displayed on the first operation display unit 700.

  The second operation display unit 800 is spaced apart from the first operation display unit 700 in the building 600. In this case, a user who is not necessarily familiar with the structure and function of the system (for example, a child, an elderly person, or a severely disabled person) can mistakenly operate the second operation display unit 800 provided in the housing 500. Can be avoided. Therefore, unexpected operation can be avoided in the system.

  According to the present embodiment, the first display unit 811 to the fourth display unit 814 (one power generation information display unit) for displaying information related to the reforming operation of the reformer 25 as information related to the power generation operation of the system include the first display unit 811. 2 is provided on the operation display unit 800. Users who are not necessarily familiar with the function of the system can be prevented from being excessively involved in the reforming operation of the reformer 24, and troubles in the reforming operation can be suppressed.

  According to the present embodiment, the power generation mode operation unit for executing the mode related to the power generation operation of the system is provided in the second operation display unit 800. It is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the power generation operation, and to prevent troubles in the power generation operation.

  A heat exchange medium exchange mode operation unit for executing a mode for confirming whether or not the system normally operates after exchanging the heat exchange medium in the heat exchange passage 520 is provided in the second operation display unit 800. . As a result, it is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the heat exchange medium exchange mode operation unit, thereby preventing troubles in operation.

  A desulfurization material replacement mode operation unit for executing a mode for confirming whether or not the system normally operates after replacing the desulfurization material 97 a is provided in the second operation display unit 800. As a result, it is possible to suppress a user who is not necessarily familiar with the function of the system from being excessively involved in the desulfurization material replacement mode operation unit, thereby preventing troubles in operation.

  Water purifier replacement mode operation unit for executing a mode for confirming whether or not the system normally operates after exchanging the water purifiers 91a and 92a for purifying the water stored in or stored in the tank 35. Is provided in the second operation display unit 800. As a result, it is possible to suppress a user who is not necessarily familiar with the function of the system from being excessively involved in the water refining material replacement mode operation unit, thereby preventing troubles in driving.

  The second operation display unit 800 is provided with a refrigerant exchange mode operation unit for executing a mode for confirming whether or not the system normally operates after the refrigerant in the circulation passage 60 is exchanged. As a result, it is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the refrigerant exchange mode operation unit, thereby preventing troubles in driving.

  A mode for confirming whether or not the system operates normally after exchanging the replaceable refrigerant treatment material 66a for performing the insulation process for improving the electrical insulation of the refrigerant by increasing the purity of the refrigerant in the circulation passage 60 is executed. The refrigerant processing material replacement mode operation unit for this purpose is provided in the second operation display unit 800. As a result, it is possible to suppress a user who is not necessarily familiar with the function of the system from being excessively involved in the refrigerant processing material replacement mode operation unit, thereby preventing troubles in driving.

  The second operation display unit 800 is provided with a purification material replacement mode operation unit for executing a mode for confirming whether the system normally operates after the filter 51 is replaced. As a result, it is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the purification material replacement mode operation unit, thereby preventing troubles in driving.

  A purge mode operation unit for executing a mode in which purge gas is supplied into the stack 1 and excess water in the stack 1 is discharged to the outside of the stack 1 is provided in the second operation display unit 800. As a result, it is possible to prevent a user who is not necessarily familiar with the function of the system from being excessively involved in the purge mode operation unit, thereby preventing troubles in driving.

(Other)
The system is not limited to the structure and arrangement shown in FIGS. Each of the pumps described above may be replaced with a compressor, a fan, a blower, or the like. The breaker 47 and the second operation display unit 800 may be separated from each other. The first setting switch 831 to the fourth setting switch 834 are not limited to the functions described above. The display contents of the first display unit 811 to the fourth display unit 814 are not limited to the above. The control device 7 implements a number of modes. However, the present invention is not limited to this, and at least one mode may be implemented among the many modes described above. The time required to execute each mode is displayed on the time display unit 818, and the remaining time is displayed on the remaining time display unit 819, but these are abolished and displayed on the first display unit 811 to the fourth display unit 814. It may be displayed. Although the content displayed using the 1st display part 811-the 4th display part 814 is the display form 1-the display form 9, it is not limited to this. Although the hot water tank 85 is installed outside the building 600, it may be installed indoors or both indoors and outdoors. The casing 500 is installed outside the building 600, but as long as the second operation display unit 800 can be exposed from the outside of the building 600, at least a part of the casing 500 is inside the building 600 (facility). It may be arranged. The housing chamber 501 of the housing 500 is partitioned by the partition wall 504 into the main chamber 502 and the maintenance chamber 503, but the partition wall 504 may not be provided. The operation and display of the first operation display unit 700 and the second operation display unit 800 are not limited to those described above, and can be set as necessary. Although the reformer 24 for reforming the fuel material to form the fuel is provided, a storage unit such as a tank for storing hydrogen gas or the like may be provided instead of the reformer 24. In the embodiment, the present invention is applied to a solid polymer fuel cell, but may be applied to, for example, a solid oxide fuel cell and a phosphoric acid fuel cell. The present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications within a range not departing from the gist.

The following technical idea can also be grasped from the description of the present specification.
[Additional Item 1] A fuel cell having a fuel electrode to which fuel is supplied and an oxidant electrode to which oxidant is supplied to supply the generated power to the power load of the facility, and the fuel of the fuel cell A fuel supply system for supplying fuel to the electrode; an oxidant supply system for supplying oxidant to the oxidant electrode of the fuel cell; and the fuel cell provided inside and / or outside the facility. And a housing having a housing chamber for housing the fuel supply system and the oxidant supply system.
[Additional Item 2] In Additional Item 1, (i) provided in a room of the facility so that a user in the room of the facility can operate, and sets an operation related to a power generation operation of the fuel cell system, and the fuel cell system A first operation display unit for displaying information related to the power generation operation of (ii), and (ii) provided in the casing so as to be exposed from the outside of the facility, and setting operations related to the power generation operation of the fuel cell system, A fuel cell system comprising: a second operation display unit for displaying information related to power generation operation of the fuel cell system.

  The present invention can be used in, for example, fuel cell systems for stationary use, electronic equipment, electrical equipment, vehicles, and the like.

It is a figure which shows the structure of a system typically. It is a piping diagram showing typically the structure of a heat exchange passage. It is a figure which shows typically the structure with which the system is equipped with the building. It is a front view which shows a 1st operation display part. It is a front view which shows a 2nd operation display part. It is a front view which shows a 1st setting switch. It is a front view which shows a 2nd setting switch. It is a front view which shows a 3rd setting switch. It is a front view which shows a 4th setting switch. It is a block diagram which shows the input and output relationship of a control apparatus. It is a flowchart which shows the control which a control apparatus implements. It is a flowchart which shows the other control which a control apparatus implements. It is a perspective view which shows a 2nd operation display part and a breaker in the state which removed the cover attached to the housing | casing. It is a perspective view which shows the 2nd operation display part and breaker covered with the cover. It is sectional drawing which cut | disconnects and shows the housing | casing which accommodates a reformer and a stack along a horizontal direction.

Explanation of symbols

  1 is a stack, 10 is a fuel electrode, 11 is an oxidant electrode, 12 is an ion conducting membrane, 13 is a refrigerant passage, 2 is a fuel supply system, 20 is a fuel supply passage, 21 is a fuel supply source, 22 is a fuel valve, 23 Is a fuel pump, 24 is a reformer, 25 is a reforming section, 25s is a sensor, 26 is a burner, 27, 43h, 29h and 55h are condensers (heat exchangers), 28 is an inlet valve, and 34 is a reforming water system. , 35 is a tank, 37 is a water pump, 38 is a water valve, 39 is an evaporation section, 40 is a branch path, 42 is a pump, 47 is a breaker, 48 is an inverter, 49 is a commercial power supply, 5 is an oxidant supply system, 50 Is a humidifier, 52 is an oxidant supply passage, 520 is a heat exchange passage, 53 is an oxidant pump, 54 is an inlet valve, 56 is a bypass, 57 is a bypass valve, 6 is a cooling system, 60 is a circulation passage, 61 is Refrigerant pump, 62 is a temperature sensor, 63 is a heater , 9 is a water purification system, 90 is a valve, 91 is a first water purification unit, 92 is a second water purification unit, 91a is a first water purification material, 92a is a second water purification material, and 93 and 94 are water level sensors. , 66 is a refrigerant treatment unit, 66a is a refrigerant treatment material, 67 is a sensor, 8 is a hot water storage system, 80 is a hot water storage passage, 82 is a pump, 85 is a hot water storage tank, 97 is a desulfurizer, 97a is a desulfurization material, and 500 is a housing , 501 is a storage room, 520 is a heat exchange passage, 521 is a pump, 600 is a building (facility), 700 is a first operation display unit, 800 is a second operation display unit (power generation mode operation unit, heat exchange medium exchange mode) Operation unit, desulfurization material exchange mode operation unit, water purification material exchange mode operation unit, refrigerant exchange mode operation unit, refrigerant treatment material exchange mode operation unit, purification material exchange mode operation unit, purge mode operation unit), 811 is a first display 812 is the second display unit, and 813 is the third display. , 814 is a fourth display unit, 818 is a time display unit, 819 is a remaining time display unit, 821 is an operation selection switch, 822 is a number selection switch, 823 is a display selection switch, 824 is an execution switch, 825 is a stop switch, 826 Denotes a forced power generation switch, 831 denotes a first setting switch, 832 denotes a second setting switch, 833 denotes a third setting switch, and 834 denotes a fourth setting switch.

Claims (15)

A fuel cell having a fuel electrode to which fuel is supplied and an oxidant electrode to which oxidant is supplied and for supplying power generated by the fuel and the oxidant to a power load of the facility;
A fuel supply system for supplying fuel to the fuel electrode of the fuel cell;
An oxidant supply system for supplying an oxidant to the oxidant electrode of the fuel cell;
A fuel cell system having a housing having a housing chamber that is provided inside and / or outside the facility and houses the fuel cell, the fuel supply system, and the oxidant supply system;
A first operation that is provided in the facility room so that a user in the facility room can operate, and sets an operation related to the power generation operation of the fuel cell system and displays information related to the power generation operation of the fuel cell system. A display unit;
A second operation display unit that is provided in the casing so as to be exposed from the outside of the facility, sets an operation related to the power generation operation of the fuel cell system, and displays information related to the power generation operation of the fuel cell system; A fuel cell system comprising:   In Claim 1, The said 2nd operation display part invalidates operation based on the said 1st operation display part, and gives priority to operation based on the said 2nd operation display part over operation based on the said 1st operation display part. Fuel cell system.   3. The fuel cell system according to claim 1, wherein the operation content by the second operation display unit includes an operation content that cannot be operated by the first operation display unit.   4. The fuel cell system according to claim 1, wherein the display content by the second operation display unit includes display content that is not displayed on the first operation display unit. 5.   5. The fuel cell system according to claim 1, wherein the second operation display unit is spaced apart from the first operation display unit. 6. 6. The reformer according to claim 1, wherein the fuel cell system is configured to generate, by a reforming operation, fuel that is stored in the housing chamber of the housing and is supplied to the fuel cell from a fuel raw material. And a power generation information display unit for displaying information regarding reforming operation of the reformer as information regarding power generation operation of the fuel cell system,
The power generation information display unit is a fuel cell system provided in the second operation display unit. 6. The reformer according to claim 1, wherein the fuel cell system is configured to generate, by a reforming operation, fuel that is stored in the housing chamber of the housing and is supplied to the fuel cell from a fuel raw material. And a power generation mode operation unit for executing a mode related to power generation operation of the fuel cell system,
The power generation mode operation unit is a fuel cell system provided in the second operation display unit. 8. The fuel cell system according to claim 1, wherein the fuel cell system includes a heat exchanger that is housed in the housing chamber of the housing and collects waste heat of the fuel cell system, and heat is exhausted by the heat exchanger. And a heat exchange medium for executing a mode for confirming whether or not the fuel cell system normally operates after exchanging the heat exchange medium in the heat exchange path. An exchange mode operation unit,
The heat exchange medium exchange mode operation unit is a fuel cell system provided in the second operation display unit. 9. The fuel cell system according to claim 1, wherein the fuel cell system is capable of reducing and replacing a sulfur component contained in a fuel material forming the fuel supplied to the fuel electrode of the fuel cell. A desulfurization material, and a desulfurization material replacement mode operation unit for executing a mode for confirming whether or not the fuel cell system normally operates after the desulfurization material is replaced,
The desulfurization material replacement mode operation unit is a fuel cell system provided in the second operation display unit. 10. The fuel cell system according to claim 1, wherein the fuel cell system includes a tank for storing a liquid phase and / or gas phase water for reforming, and water stored in or stored in the tank. A water refining material for purifying the water refining material and a water refining material replacement mode operation unit for executing a mode for confirming whether or not the fuel cell system normally operates after the water refining material is replaced. And
The water purification material replacement mode operation unit is a fuel cell system provided in the second operation display unit. 11. The fuel cell system according to claim 1, wherein the fuel cell system cools the fuel cell during power generation operation and circulates a replaceable refrigerant, and after replacing the refrigerant in the circulation passage. A refrigerant exchange mode operation unit for executing a mode for confirming whether or not the fuel cell system normally operates in
The refrigerant exchange mode operation unit is a fuel cell system provided in the second operation display unit. 11. The fuel cell system according to claim 1, wherein the fuel cell system is configured to cool the fuel cell during power generation operation and circulate a replaceable refrigerant, and to increase the purity of the refrigerant in the circulation passage. A replaceable refrigerant processing material that performs an insulation process that increases the electrical insulation of the refrigerant, and a mode for confirming whether or not the fuel cell system operates normally after the refrigerant processing material is replaced. A refrigerant treatment material exchange mode operation section,
The refrigerant treatment material replacement mode operation unit is a fuel cell system provided in the second operation display unit. 13. The fuel cell system according to claim 1, wherein the fuel cell system purifies the oxidant supplied by the fuel cell and replaces the purifying material, and the fuel cell system after the purifying material is replaced. And a purifier replacement mode operation unit for executing a mode for confirming whether or not the device normally operates,
The purification material replacement mode operation unit is a fuel cell system provided in the second operation display unit. 14. The fuel cell system according to claim 1, wherein the fuel cell system supplies purge gas to the inside of the fuel cell after detecting or determining that flooding has occurred in the fuel cell, and Having a purge mode operation unit for executing a mode of discharging excess water inside the battery to the outside of the fuel cell;
The purge mode operation unit is a fuel cell system provided in the second operation display unit.   15. The method according to claim 1, wherein the second operation display unit is a time required to execute each of the modes and / or a remaining time when the modes are executed. Fuel cell system that displays time.

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