JP2006128138A - Fuel cell device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce rapidly the concentration of gas leaking in the package within a safe range. <P>SOLUTION: In a step S1, a gas detection sensor measures the concentration of a fuel gas in the package. In the step S2, the gas concentration judgement device judges whether or not the gas concentration measured by the gas detection sensor is a first set valuer or less. When the gas concentration is in the first set value or less, the operation of the device is started in the step S3. When the concentration of the fuel gas exceeds the first set value, the operation of the device is stopped (step S4), and in the step S5, the abnormality state is informed. In the step S7, the gas detection sensor measures the gas concentration in the package 33, and in the step S8, if the gas concentration measured has become a second set value being a second set concentration, or less, then, it moves to the step S9, and the operation of a ventilation fan is stopped. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fuel cell device that generates power by an electrochemical reaction between a fuel gas and an oxidant gas.

  In recent years, as one of the new power generation systems, there has been a fuel cell device using an electrolyte membrane and a catalyst that has an advantage of low-noise power generation that does not generate harmful substances such as NOX and SOX and has low noise. It is considered. Such a fuel cell device includes a reformer that generates hydrogen gas from natural gas, which is a fuel gas, a fuel cell that generates electricity by an electrochemical reaction between the hydrogen gas and oxygen (air) as an oxidant, A power converter (inverter) that converts electrical energy generated in the fuel cell into commercial voltage and frequency, a hot water tank that stores the exhaust heat generated by power generation as hot water, and when the hot water in the hot water tank is full, It is basically composed of heat radiating means for releasing heat to the outside.

In the above basic configuration, in order to smoothly operate each component, an air supply device (air blower) for supplying oxygen (air) to the fuel cell, a blower for boosting natural gas, and natural gas Desulfurizer that removes sulfur content, a pump that sends water (steam) to the reformer, a pump that sends water to the fuel cell to humidify the electrolyte membrane of the fuel cell, and removes impurities in the water Various auxiliary equipment such as a purification device, an ion exchange device that removes the electrolyte of water, a controller that controls the flow rate of fuel gas, air, and water with a solenoid valve, and a solenoid valve are arranged, They are physically and electrically connected by wiring. And each component of the apparatus containing a thermal radiation means is arrange | positioned in the common package, and only the hot water storage tank is provided separately from the package. In addition, when the apparatus is in operation, the cathode exhaust gas generated from the cathode of the fuel cell and the combustion exhaust gas generated during combustion of the reformer are opened on the outer surface of the package (package outlet part). ) More discharged to the outside.
JP-A-8-31436

  By the way, in the above configuration, when carbon monoxide gas generated at the stage of generating hydrogen gas by the fuel gas, hydrogen gas, or reformer leaks for some reason such as loose piping connection, It needs to be detected immediately to prevent gas leakage. In consideration of such points, for example, Patent Document 1 discloses that a ventilation fan (ventilation device) provided in the package always discharges the atmosphere in the package and takes in fresh outside air, and in the vicinity of the ventilation fan. When the gas detector provided in 1 detects a flammable gas leaking into the package, the ventilation air volume of the ventilation fan is increased to suppress the increase in gas concentration.

  A gas detection sensor applied to such a gas detector is a bridge when a detection element made of a combustion catalyst such as Pt (platinum) is incorporated in a bridge circuit and a voltage is applied, and the gas touches the detection element to cause an exothermic reaction. The voltage balance of the circuit changes so that a signal corresponding to the gas concentration can be taken out as a voltage output. However, if the mounting structure of the gas detection sensor and the measures after detection are not appropriate, the gas detection capability will not be able to be detected and gas leaks will not be detected, or the gas concentration will not be able to be quickly reduced to a safe range. Cause problems. In particular, the fuel cell device disclosed in Patent Document 1 is provided with a gas detector in the vicinity of the ventilation fan so that gas leakage from any location in the package can be detected. If the wind speed is strong, it is cooled and accurate measurement is not possible.

  Another problem is that the heat dissipation means must be provided in a device that is not conventionally combined with a hot water tank. Therefore, in a device provided with a hot water tank, the heat dissipation means can be used together with other components. , Remain in a common package. However, when the heat dissipating means is arranged inside the package, the heat dissipating means has a large volume, and there are many restrictions on the layout in the package considering the direction of intake and exhaust air and securing the air flow path. Eventually, there was a concern that the useless space increases and the external dimensions of the package become larger than necessary. In addition, the package has the air blower, cooling fan for the electric control circuit, ventilation fan, etc., and if the position of these air blowers with the air intake / exhaust port is improper, the air intake / exhaust are mutually discharged. There was a problem that the set air volume could not be secured due to interference with each other and that sufficient cooling effect could not be obtained by sucking high temperature air.

  As another problem, when an earthquake or the like occurs during operation of the equipment, each component in the equipment vibrates and the piping is loosened or damaged, resulting in fuel gas, hydrogen gas or carbon monoxide. There is a risk of gas leaking. Furthermore, if the main body of the apparatus falls due to an earthquake or other unforeseen external force, there is a risk that damage will be further increased.

  In addition, because such a fuel cell device is a door-to-door power generation, it is also useful as an emergency power supply when the system power supply is cut off in the event of a disaster, but when the system power supply is cut off, the fuel gas supply path is often cut off, There is dissatisfaction that the device at the corner cannot be operated.

  Another problem is that when the operation of the device is stopped, the package outlet that is left open stops gas discharge, and foreign objects such as insects and dust can easily enter through this outlet. , Get inside the fuel cell and reformer. Therefore, there arises a problem that the performance of these fuel cells and reformers is remarkably deteriorated or operation becomes difficult.

  In order to prevent such foreign matter from entering, it is conceivable to provide a filter at the outlet, but it is necessary to attach a fine filter of several microns to remove foreign matter so as not to affect the performance of the apparatus. However, when such a filter is added, the pressure loss of the exhaust gas flow path leading to the outlet portion is increased, thereby increasing the power consumption of the auxiliary device and reducing the efficiency of the entire apparatus. Further, when the filter is clogged, there is a problem that the pressure loss of the flow path is further increased and normal operation cannot be maintained.

  Moreover, since such exhaust gas contains water vapor in a state close to saturation, when it is discharged to the outside of the package, it touches the cold outside air to condense the water vapor and appear as white smoke. For this reason, the user feels uncomfortable, or water droplets adhere to the package near the outlet and cause corrosion.

  The present invention is intended to solve the above-described problems, and provides a fuel cell device capable of accurately detecting a gas leaking into a package and quickly reducing the gas concentration to a safe range. This is the first purpose.

  A second object of the present invention is to provide a fuel cell device that can reduce the wasteful space in the package as much as possible and can form the outer dimensions of the package compactly.

  A third object of the present invention is to provide a fuel cell device that can safely protect the device even when vibration or external force is applied to the device.

  A fourth object of the present invention is to provide a fuel cell device capable of preventing foreign matter from entering the fuel cell and the reformer without covering the outlet with a fine filter.

  In the fuel cell device according to the first aspect of the present invention, when the gas detection means detects a gas having a set concentration or more, the operation of the device is immediately stopped, and further gas leakage is prevented, and the gas concentration becomes the set concentration or less. Until then, the ventilation device is operated to exhaust the gas in the package to the outside. Thereby, the gas concentration can be quickly reduced to a safe range without accumulating gas in the package.

  In the fuel cell device according to claim 2, when the gas detection means detects a gas having a concentration higher than the set concentration, the operation of the device is immediately stopped to prevent further leakage of the gas and close the ventilation port for ventilation. This can prevent a large amount of gas from leaking out of the package in a short time.

  In the fuel cell device according to claim 3, when the gas detecting means detects a gas having a concentration higher than the set concentration, the operation of the device is immediately stopped to prevent leakage of further gas, and the air in the package is circulated to The gas component is adsorbed by the adsorption means in the circulation channel. Thereby, the density | concentration of gas can be rapidly reduced to the safe range.

  In the fuel cell device according to claim 4, when the gas detecting means detects a gas having a concentration higher than the set concentration, the operation of the device is immediately stopped to prevent leakage of further gas, and any one or combination of light, sound and display. Inform the user promptly of an abnormal increase in gas concentration. Thereby, the density | concentration of gas can be rapidly reduced to the safe range.

  In the fuel cell device according to the fifth aspect, the heat dissipating means is disposed in the external liquid storage tank portion together with the liquid storage tank. In other words, there is no heat dissipation means in the package, and there is no need to worry about interference with the intake / exhaust of the heat dissipation means when arranging other components in the package, and the useless space in the package is minimized. As a result, the outer dimensions of the package can be compactly formed, and sufficient performance can be secured in the package.

  In the fuel cell device according to the sixth aspect, the heat transmitted from the tubular body through which the warm liquid passes to the heat radiating portion is cooled by the wind of the blower and returned as a cold liquid. By increasing the heat radiation area by the heat radiation part, it is possible to cool the warm liquid efficiently.

  In the fuel cell device according to the seventh aspect, since the heat radiating means is located below the liquid storage tank, even if the liquid storage tank is filled with a warm liquid, it is not affected by convection. Therefore, it is possible to prevent a decrease in the heat dissipation efficiency of the heat dissipation means.

  In the fuel cell device according to the eighth aspect, the switching means for switching the flow path of the warm liquid to the heat radiating means side is provided in the housing for storing the liquid storage tank and the heat radiating means. Therefore, two pipes for connecting the package and the liquid storage unit are required for the warm liquid and the cold liquid. Therefore, installation work can be easily performed.

  In the fuel cell device according to claim 9, the air inlet of the heat dissipating means is provided in the housing, and this is provided on the back surface facing the house, thereby reducing the chance of sucking in foreign matter such as dust outside the room. It is also possible to prevent a decrease in the heat dissipation effect of the heat dissipation means due to the intrusion of.

  In the fuel cell device of claim 10, since the acceleration applied to the device can be detected by the seismic device, the device can be safely protected by the seismic device even if vibration or external force is applied to the device.

  In the fuel cell device according to the eleventh aspect, when the acceleration applied to the device becomes a set value or more, the abnormality can be detected and the device can be safely protected.

  In the fuel cell device according to claim 12, since it is possible to determine whether or not the seismic device itself is abnormal based on the magnitude of the acceleration detected by the acceleration detecting means, the abnormality of the device is directly determined from the output of the seismic device. It becomes possible to judge.

  In the fuel cell device according to the thirteenth aspect, since the change in the posture of the device can be detected by the state detection device, the device can be safely protected by the state detection device even if vibration or external force is applied to the device.

  In the fuel cell device according to the fourteenth aspect, when the change in the posture of the device is tilted by a predetermined value or more, the abnormality can be detected and the device can be safely protected.

  In the fuel cell device according to claim 15, since it is possible to determine whether or not the state detection device itself is abnormal based on the amount of change in posture detected by the state detection device, the abnormality of the device is directly detected from the output of the state detection device. It becomes possible to judge.

  In the fuel cell device according to claim 16, when the seismic sensing device or the state detection device detects an abnormality, the gas supply is shut off to prevent gas leakage, and the operation of the device is forcibly stopped to ensure the safety of the device. The sex can be increased.

  In the fuel cell device according to claim 17, when the seismic device or the state detection device detects an abnormality, it is notified by any one or combination of light, sound, and display, so the user can be promptly notified of the abnormality of the device due to vibration or external force. I can inform you.

  In the fuel cell device according to claim 18, the acceleration applied to the device can be detected by the seismic device, and the change in the posture of the device can be detected by the state detection device. Therefore, even if vibration or external force is applied to the device, the device can be safely protected by these seismic devices or state detection devices. Moreover, if at least one of the seismic device or the state detection device operates normally, an abnormality of the device can be detected, so that safety can be further improved.

  In the fuel cell device according to claim 19, if the detected acceleration of the seismic device is less than the set acceleration, even if the fuel supply from the main fuel line is interrupted, the fuel gas is supplied from the gas cylinder and the operation of the device is continued. As a result, even when the system power supply is cut off and the main fuel line is also cut off in the event of a disaster, the operation of the apparatus can be continued and used as an emergency power supply. On the other hand, if the detected acceleration of the seismic device is equal to or higher than the set acceleration, all fuel supply is shut off and the operation of the device is stopped, so that the device can be safely protected in the event of large vibrations or external forces. can do.

  In the fuel cell device of the twentieth aspect, the supply stop of the fuel gas from the main fuel line can be detected more directly and reliably by the shutoff detection device.

  In the fuel cell device of the twenty-first aspect, widely used pressure detecting means or flow rate detecting means can be used as the shutoff detecting device.

  In the fuel cell device according to claim 22, since the cathode exhaust outlet from the fuel cell can be opened and closed by an opening and closing mechanism as required, the fuel cell can be provided without having to bother covering the outlet with a conventional filter. It is possible to prevent foreign matter from entering.

  In the fuel cell device according to claim 23, since the fuel exhaust outlet from the reformer can be opened and closed by an opening and closing mechanism as necessary, the modification is possible even if the outlet is not covered with a conventional filter. Intrusion of foreign matter into the quality device can be prevented.

  In the fuel cell device according to claim 24, the cathode exhaust outlet portion from the fuel cell and the fuel exhaust outlet portion from the reformer can be opened and closed by an opening / closing mechanism as required. Even if it does not bother to cover the outlet with a filter, it is possible to prevent foreign matter from entering the fuel cell and the reformer.

  In the fuel cell device according to claim 25, since the exit portion of the mixing portion in which the cathode exhaust from the fuel cell and the fuel exhaust from the reformer are mixed can be opened and closed by an open / close mechanism as required. Even if it does not bother to cover the outlet with such a filter, it is possible to prevent foreign matter from entering the fuel cell and the reformer.

  In the fuel cell device of the twenty-sixth aspect, since the outlet portion is opened during operation of the device, the pressure loss of the exhaust passage reaching the outlet portion does not increase. On the other hand, when the operation of the apparatus is stopped, the outlet portion is blocked, so that foreign substances can be reliably prevented from entering.

  In the fuel cell device according to the twenty-seventh aspect, the outlet portion can be easily opened or closed by moving the closing means from the driving device via the transmission device.

  In the fuel cell device according to claim 28, the exhaust gas from the fuel cell and / or the reformer is somewhat higher in temperature than the outside air temperature and the water vapor is nearly saturated. Therefore, it is immediately diluted with the exhaust from the exhaust port of the ventilator, and the water vapor diffuses into the atmosphere without condensing. As a result, it is possible to prevent the exhaust from the outlet from appearing as white smoke, or to prevent water droplets from adhering to the package near the outlet.

  In the fuel cell device according to claim 29, the exhaust gas from the fuel cell and / or the reformer is somewhat higher in temperature than the outside air temperature, and the water vapor is close to saturation. Therefore, it is immediately diluted with the exhaust gas passing through the exhaust flow path from the ventilator, and the water vapor diffuses into the atmosphere without condensing. As a result, it is possible to prevent the exhaust from the outlet from appearing as white smoke, or to prevent water droplets from adhering to the package near the outlet.

  According to the fuel cell device of claim 1 of the present invention, it is possible to quickly reduce the gas concentration to a safe range without accumulating gas in the package.

  According to the fuel cell device of claim 2 of the present invention, it is possible to prevent a large amount of gas from leaking out of the package in a short time.

  According to the fuel cell device of claim 3 of the present invention, it is possible to quickly reduce the gas concentration to a safe range.

  According to the fuel cell device of claim 4 of the present invention, it is possible to quickly reduce the gas concentration to a safe range.

  According to the fuel cell device of the fifth aspect of the present invention, the wasteful space in the package can be reduced as much as possible, the outer dimensions of the package can be made compact, and sufficient performance can be secured in the package.

  According to the fuel cell device of claim 6 of the present invention, the warm liquid can be efficiently cooled.

  According to the fuel cell device of the seventh aspect of the present invention, the heat radiating means is not affected by convection from the liquid storage tank and the heat radiating efficiency of the heat radiating means can be prevented from being lowered.

  According to the fuel cell device of claim 8 of the present invention, only two pipes connecting the package and the liquid storage tank are required, and installation work can be easily performed.

  According to the fuel cell device of the ninth aspect of the present invention, it is possible to prevent the heat radiation effect of the heat radiation means from being lowered due to the intrusion of foreign matter.

  According to the fuel cell device of claim 10 of the present invention, the device can be safely protected by the seismic device.

  According to the fuel cell device of the eleventh aspect of the present invention, it is possible to safely detect the abnormality based on the acceleration of the set value and to protect the device safely.

  According to the fuel cell device of the twelfth aspect of the present invention, the abnormality can be determined directly from the output of the seismic device.

  According to the fuel cell device of claim 13 of the present invention, the device can be safely protected by the state detection device.

  According to the fuel cell device of the fourteenth aspect of the present invention, the device can be safely protected by detecting an abnormality based on the inclination of the set value.

  According to the fuel cell device of the fifteenth aspect of the present invention, it is possible to determine the abnormality directly from the output of the state detection device.

  According to the fuel cell device of claim 16 of the present invention, the safety of the device can be further improved.

  According to the fuel cell device of claim 17 of the present invention, it is possible to promptly inform the user of the abnormality of the device due to vibration or external force.

  According to the fuel cell device of claim 18 of the present invention, the device can be safely protected by the seismic device or the state detection device, and both the seismic device and the state detection device are provided. Safety can be further increased.

  According to the fuel cell device of the nineteenth aspect of the present invention, the device can be effectively used as an emergency power source when a disaster occurs. In addition, when the vibration or external force to the device is large, the device can be safely protected.

  According to the fuel cell device of the twentieth aspect of the present invention, it is possible to detect the supply stop of the fuel gas from the main fuel line more directly and reliably.

  According to the fuel cell device of claim 21 of the present invention, a pressure sensor or a flow rate sensor can be used as a shutoff detection device.

  According to the fuel cell device of claim 22 of the present invention, it is possible to prevent foreign matter from entering the fuel cell without covering the outlet with a filter.

  According to the fuel cell device of claim 23 of the present invention, it is possible to prevent foreign matter from entering the reforming device without covering the outlet with a filter.

  According to the fuel cell device of claim 24 of the present invention, it is possible to prevent foreign matter from entering the fuel cell and the reforming device without covering the outlet with a filter.

  According to the fuel cell device of claim 25 of the present invention, it is possible to prevent foreign matter from entering the fuel cell and the reformer without covering the outlet portion with a filter.

  According to the fuel cell device of claim 26 of the present invention, it is possible to continue the stable operation while maintaining the efficiency of the entire device without increasing the pressure loss of the exhaust passage leading to the outlet portion. Intrusion of foreign matter can be reliably prevented when the operation is stopped.

  According to the fuel cell device of claim 27 of the present invention, the outlet portion can be easily opened or closed.

  According to the fuel cell device of the twenty-eighth aspect of the present invention, it is possible to prevent the exhaust from the outlet portion from appearing as white smoke or water droplets from adhering to the package near the outlet portion.

  According to the fuel cell device of claim 29 of the present invention, it is possible to prevent the exhaust from the outlet from appearing as white smoke or water droplets from adhering to the package near the outlet.

  Embodiments of a fuel cell device according to the present invention will be described below with reference to the accompanying drawings. 1 to 3 show a first embodiment of the present invention. In FIG. 1 showing the configuration of the present apparatus, reference numeral 1 denotes a booster blower for boosting fuel gas, and activated carbon is disposed at the discharge port of the booster blower 1. A desulfurizer 2 consisting of the above is connected. A fuel cutoff valve 3 for shutting off the supply of fuel gas is provided at the inlet of the booster blower 1. Connected to the outlet of the desulfurizer 2 is an inlet of a reformer 4 composed of a reforming section made of a catalyst and a burner section for heating the reforming section. The inlet of a CO shift reactor 5 consisting of Furthermore, an inlet of a CO selective oxidizer 6 made of a catalyst is connected to the outlet of the CO shift reactor 5. The outlet of the CO selective oxidizer 6 is connected to the anode 8 of the fuel cell 7, and the outlet of the anode 8 is connected to the burner section of the reformer 4.

  The fuel cell 7 sandwiches an electrolyte membrane 10 made of a solid polymer between an anode 8 and a cathode 9 as electrodes carrying a catalyst, and sends fuel gas and air to the anode 8 and the cathode 9 respectively. A separator (not shown) in which the flow path is formed is provided. Reference numeral 11 denotes an air blower as an air supply device. The discharge port of the air blower 11 is branched in three directions, one to the cathode 9 of the fuel cell 7 and the other one to the burner portion of the reformer 4. The other one is connected to the CO selective oxidizer 6, respectively.

  The gas port of the cathode 9 constituting the fuel cell 7, that is, the outlet of the cathode exhaust gas, is connected to the gas port of the exhaust heat utilization heat exchanger 15 through the cathode exhaust gas pipe 14. Further, a purification device 16 made of a filter (pore diameter 1 micron), an ion exchange device 17 made of an ion exchange resin, and a water pump 18 are sequentially connected to the heat exchanger 15 using exhaust heat. The discharge port of the water pump 18 is branched in two directions, one discharge port is connected to the anode 9 of the fuel cell 7, and the other discharge port is connected to the reformer 4 via the heat exchanger 21 for steam generation. Connected to the entrance.

  The outlet of the combustion exhaust gas in the burner section constituting the reformer 4 is connected to the inlet of the heat exchanger 21 for generating steam. The combustion exhaust gas from the burner section of the reformer 4 passes through the burner combustion exhaust gas pipe 22 via the steam generating heat exchanger 21, and this pipe 22 is the gas port of the cathode 9 of the fuel cell 7. Is connected to the exhaust gas heat exchanger 15 together with the cathode exhaust gas from the fuel cell 7.

  23 is a city water shut-off valve that controls the inflow of city water from the city water intake 24, the outlet of which passes through the heat exchanger 15 that uses exhaust heat, and a hot water tank that is an external device that uses heat from the hot water outlet 25 Connected to 26 hot water inlets 27. Reference numeral 28 denotes a hot water outlet of the hot water tank 26. Reference numeral 29 denotes a cold water outlet of the hot water storage tank 26. The cold water outlet 29 is connected to the inlet of the exhaust heat utilization heat exchanger 15 through the circulation pump 30 and the cold water intake 31 in order. The circulation pump 30 feeds the cold water in the hot water storage tank 26 to the exhaust heat utilization heat exchanger 15.

  Reference numeral 33 denotes a package that forms an outer shell of the fuel cell device main body, which accommodates the fuel cell 7 and its peripheral components therein. A gas detection sensor 34 that detects the gas concentration of methane, hydrogen, carbon monoxide, or the like is provided on the top of the package 33. If the concentration of each gas cannot be measured with a single gas detection sensor 34, a combination of several gas detection sensors may be used. Reference numeral 35 denotes a ventilation fan as a ventilation device attached to the package 33.

  Other than this, although not shown in FIG. 1, obtained by auxiliary devices such as sensors, controllers and switches (for example, solenoid valves) for controlling the flow and temperature of gas, air and water, and the fuel cell 7. An inverter that converts DC generated power into AC power, an electric control device (including a gas concentration determination device) that controls the operation of the device, and the like are also arranged and connected in the device.

  FIG. 2 shows the configuration of the main part of the fuel cell device excluding the hot water storage tank 26. 33 is a box-shaped package as described above. The bottom surface of the package 33 includes a fuel cutoff valve 3, an air blower 11, a purification device 16, an ion exchange device 17, a water pump 18, a city water cutoff valve 23, a circulation pump 30, and the like. An auxiliary device to be configured, that is, an auxiliary machine 41 is disposed and placed. A fuel reformer such as a reformer 4, a CO shift reactor 5, a CO selective oxidizer 6, a steam generating heat exchanger 15, etc. in a state of being partitioned by a partition plate 42 at the upper part of the auxiliary machine 41. 43 is arranged. The fuel cell 7 is located in the upper part of the package 33, and an electric control device 44 that penetrates the partition plate 42 is disposed between the fuel cell 7 and the auxiliary machine 41. This electric control device 44 includes an inverter that converts the generated power (DC power) of the fuel cell 7 into AC power of commercial voltage and frequency, and an operation control unit (including a gas concentration determination device) that controls the operation of each part of the device. Consists of. A fuel inlet 45 for taking in a fuel gas such as natural gas is provided on one side of the package 33 facing the auxiliary machine 41, and a market is provided on the other side of the package 33 facing the auxiliary machine 41. A water intake 24, a hot water outlet 25 connected to the hot water inlet 27 of the hot water tank 26, and a cold water inlet 31 connected to the cold water outlet 29 of the hot water tank 26 are provided.

  In the above configuration, the fuel reformer 43 is for generating hydrogen gas from the fuel gas as the raw fuel taken in from the fuel inlet 45, and oxygen in the air taken from the air blower 11, that is, the oxidant gas and The hydrogen gas from the fuel reformer 43 causes an electrochemical reaction in the fuel cell 7 and generates power in the fuel cell 7. The auxiliary machine 41 is for smoothly operating each component such as the fuel cell 7 and the fuel reformer 43.

  The uppermost portion of the package 33 is entirely covered with a wall portion, and a concave portion 47 that is recessed upward is formed at a position where the gas detection sensor 34 is attached to the upper surface inner wall 46 formed on the uppermost portion. Here, the gas detection sensor 34 is arranged on the upper surface near one side of the package 33, but on the upper side of the other side surface of the package 33 facing this, ventilation for taking fresh outside air into the package 33. A fan 35 is provided. That is, the gas detection sensor 34 is provided at a position that is not affected by the outside air taken in from the ventilation fan 35. Reference numeral 48 denotes an operation remote controller as an operation unit that exchanges signals with the electric control device 44 wirelessly or wired to remotely control the operation of the device. When the gas detection sensor 34 detects a gas having a concentration higher than the set concentration, the operation remote controller 48 receives an abnormality signal from the electric control device 44 and notifies the abnormality by any one of light, sound, display, or a combination thereof. An abnormality notification device 49 is provided.

  Next, the effect | action is demonstrated about the said structure. When the fuel cell device is set to the operating state by operating the operation remote controller 48, the fuel gas passes through the fuel shut-off valve 3 opened from the fuel intake 45, enters the booster blower 1 and is boosted, and sent to the desulfurizer 2. Here, sulfur contained in the fuel gas is removed by the adsorption action of the desulfurizing agent. In this embodiment, activated carbon is used as the desulfurizing agent. However, other catalysts may be used as long as sulfur contained in the fuel gas can be removed. The purpose of removing the sulfur content by the desulfurizer 2 is to prevent the subsequent catalyst such as the reformer 4 from being deteriorated by the fuel sulfur content. Although not described in detail in the present embodiment, the reformer 4 is heated to a temperature necessary for reforming in advance by an electric heating device or a gas burner.

  The fuel gas that has passed through the desulfurizer 2 is mixed with the steam generated by the steam generating heat exchanger 15 and enters the reforming section of the reformer 4. This reforming section is heated to about 750 ° C. by the burner section, and the fuel gas is changed into hydrogen gas and carbon dioxide (carbon dioxide) by the action of the catalyst. However, the gas produced here contains a little amount of carbon monoxide, but the performance of the solid polymer fuel cell 7 to be described later is significantly reduced by carbon monoxide. Must be below a certain value.

  The fuel gas that has passed through the reformer 4 enters the next CO shift reactor 5, where carbon monoxide reacts with water vapor to change into hydrogen gas and carbon dioxide due to the action of the catalyst. The concentration drops to a fairly low level. The fuel gas that has passed through the CO shift reactor 14 further enters the CO selective oxidizer 6 and is mixed with the air (oxygen) fed by the air blower 11, and the carbon monoxide contained therein is oxidized by the action of the catalyst. Change to carbon. At this time, the concentration of carbon monoxide contained in the fuel gas can be lowered to a concentration that does not adversely affect the fuel cell 7 for the first time.

  The fuel gas that has passed through the CO selective oxidizer 6 is sent to the anode 8 that is one electrode of the fuel cell 7. Air (oxygen) is fed into the cathode 9 as the other electrode by the air blower 11. The hydrogen of the anode 8 is ionized by the action of the catalyst and is combined with oxygen on the cathode 9 side through the electrolyte membrane 10. Thereby, when water is generated, reaction heat is generated. Further, due to this electrochemical reaction, a negative electrode potential is generated at the anode 8 and a positive electrode potential is generated at the cathode 9, and electric power can be taken out from the fuel cell 7.

  The fuel gas that has passed through the anode 8 consumes most of the hydrogen gas, but still contains a considerable concentration of hydrogen gas, which is returned to the burner section of the reforming section 4 and is returned by the air blower 11. It is mixed with the air sent in and burned in the burner section. Thereby, the remaining hydrogen gas can be used for raising the temperature of the reforming section.

  The air that has passed through the cathode 9 has water (water vapor) and heat generated in the fuel cell 7, and passes through the cathode 9 of the fuel cell 7 through the cathode exhaust gas pipe 14 to the exhaust heat utilization heat exchanger 15. By returning the water to the anode 17 of the fuel cell 3 by the water pump 30, the solid polymer membrane (electrolyte membrane 10) is humidified and the fuel cell 7 is cooled. At that time, the cooled water passes through the purification device 16 to remove impurities, and then passes through the ion exchange device 17 to remove the electrolyte. Similarly, the water sent to the steam generating heat exchanger 15 by the water pump 18 is heated by the burner exhaust gas (combustion exhaust gas) discharged from the burner portion of the reformer 4 to increase the pressure as steam. The fuel gas from the blower 1 enters the reforming section of the reformer 4. The burner exhaust gas that has passed through the water vapor generating heat exchanger 22 is sent together with the exhaust gas from the cathode 9 to the exhaust heat utilization heat exchanger 15, where it releases the thermal energy it has.

  Next, the operation of the heat utilizing external device including the hot water tank 26 will be described. First, before the fuel cell device is operated, the city water shut-off valve 23 is opened, and the city water is filled in the hot water storage tank 26. Thereafter, when the operation of the fuel cell device is started, the circulation pump 30 is activated, and the circulation pump 30 sends the cold water in the hot water storage tank 26 from the cooling outlet 29 to the exhaust heat utilization heat exchanger 15, and the cathode 9 of the fuel cell 7 The heat energy of the exhaust gas from the burner part of the reformer 4 is heated to become hot water. This hot water is sent from the exhaust heat utilization heat exchanger 15 to the hot water inlet 27 of the hot water tank 26 and returns to the hot water tank 26 again. The inside of the hot water storage tank 26 is in a two-layered state due to the difference in water temperature. The hot water is located in the upper layer of the hot water storage tank 26 and the cold water is located in the lower layer of the hot water storage tank 26. Here, by opening the hot water outlet 28 attached to the upper part of the water storage tank 26, it becomes possible to use the hot water obtained by using the heat exchanger 15 utilizing exhaust heat.

  Under such operating conditions, the pipes connecting the components in the package 33 are loosened, and flammable or toxic gases such as fuel gas, hydrogen gas, and carbon monoxide gas leak into the package 33. In this case, the density of these gases is lower than that of air, so that they accumulate at the top of the package 33. The inner wall 46 of the upper surface of the package 33 forms a substantially horizontal surface, but a concave portion 47 is formed at a position where the gas detection sensor 34 is attached, located further above the inner wall 46 of the upper surface. The leaked gas concentrates and accumulates. Therefore, the gas detection sensor 34 can quickly detect a gas leak.

  Next, a series of procedures relating to gas leak detection will be described with reference to the flowchart of FIG. In the figure, when the start switch of the apparatus is turned on, first, in step S1, the gas detection sensor 34 measures the concentration of fuel gas or the like in the package 33. Next, in step S2, the gas concentration determination device in the electric control device 44 determines that the gas concentration measured by the gas detection sensor 34 is the first set concentration, that is, the first set value (for example, methane gas is 5.3% of the explosion range concentration). It is determined whether or not the following is set). If the gas concentration measured by the gas detection sensor 34 is equal to or lower than the first set value, the apparatus is started in step S3 to start operation.

  During the operation of the apparatus, since the fuel gas reforming is performed in the fuel reforming apparatus 43, the concentration of hydrogen gas or carbon monoxide gas is also measured by the gas detection sensor 34. For example, for hydrogen gas If the concentration is 4% or less of the explosion range concentration, the operation is continued. If carbon monoxide gas is 50 ppm or less of the health hazard prevention index, the operation is continued.

  Here, if any of the fuel gas (methane), hydrogen gas, and carbon monoxide exceeds the first set value, the gas concentration determination device determines that there is an abnormality and stops the operation of the device (step S4). In step S5, a gas leak abnormality signal is sent to the operation remote controller 48, and an abnormality notification device 49 of the operation remote controller 48 notifies the abnormal state by warning sound, lighting of a warning lamp, or display. At the same time, the powerful operation for increasing the exhaust amount of the ventilation fan 34 is continued (step S6). If the ventilation fan 34 has stopped until then, start ventilation immediately, and if the ventilation fan 34 can sufficiently exhaust the leaked gas in the package 33 even under normal ventilation, ventilate in the same state. What is essential is that the ventilation fan 34 is in an operating state in which the abnormal gas concentration in the package 33 can be quickly reduced.

  In subsequent step S7, the gas detection sensor 34 measures the gas concentration in the package 33, and in the subsequent step S8, the measured gas concentration is a second set value that is the second set concentration (below a sufficiently safe gas concentration or less). For example, when the value is equal to or less than 1/10 of the first set value, the process proceeds to step S9 and the operation of the ventilation fan 34 is stopped. In this state, most of the gas leaking into the package 33 is discharged to the outside, and the inside of the package 33 has a safe gas concentration.

  As described above, in this embodiment, in the fuel cell device that generates power in the package 33 by the electrochemical reaction between the fuel gas and the oxidant gas, the gas detection sensor as the gas detection means for detecting the gas concentration in the package 33. 34 is arranged on the upper portion of the package 33, that is, on the upper inner wall 46.

  In this case, in particular, the flammable or toxic gas that leaks into the package 33 of the fuel cell device, that is, the gas, is lower in density and lighter than air, and therefore accumulates in the upper portion of the package 33. Therefore, if the gas detection sensor 34 is disposed on the upper portion of the package 33, the gas leaking into the package 33 can be detected accurately.

  Further, in this embodiment, the gas detection sensor 34 is disposed in the recess 47 provided in the inner wall 46 on the upper surface of the package 33, so that the gas that has reached the upper surface in the package 33, that is, the gas, enters the recess 47 located on the uppermost portion. Move and gather. Therefore, the gas leaking into the package 33 can be detected more accurately by the gas detection sensor 34 disposed in the recess 47.

  In the present embodiment, the gas detection sensor 34 is provided on the side facing the ventilation fan 35 as a ventilation device for ventilating the inside of the package 33. In this case, since the gas detection sensor 34 is provided at a position facing the ventilation fan 35, the gas detection sensor 34 is not cooled down due to the strong wind speed by the ventilation fan 35, and the measurement is performed correctly. Is possible.

  In this embodiment, the gas detection sensor 34 is configured to detect hydrogen, methane, and carbon monoxide. As a result, the main gas components leaking into the package 33, hydrogen, methane, and carbon monoxide, can be accurately detected by the gas detection sensor.

  In this embodiment, in the fuel cell device that generates power in the package 33 by the electrochemical reaction between the fuel gas and the oxidant gas, the gas detection sensor 34 for detecting the gas concentration in the package 33 has the first set concentration. When a gas higher than (first set value) is detected, the operation of the apparatus is stopped, and until the gas detection sensor 34 detects the second set concentration (second set value) or less, the inside of the package 33 It is configured to operate a ventilation fan 35 which is a ventilation device for performing ventilation.

  In this way, when the gas detection sensor 34 detects a gas of the first set concentration or higher, the operation of the apparatus is immediately stopped, and further gas leakage is prevented, and until the gas concentration becomes equal to or lower than the second set concentration. Then, the ventilation fan 35 is operated and the gas in the package 33 is immediately discharged to the outside. As a result, the gas concentration can be quickly lowered to a safe range without accumulating gas in the package 33.

  Furthermore, in this embodiment, an operation remote controller 48 as an operation unit for remotely controlling the operation of the apparatus and a gas detection sensor 34 for detecting the gas concentration in the package 33 are provided, and an electrochemical reaction between the fuel gas and the oxidant gas. In the fuel cell device that generates power in the package 33, when the gas detection sensor detects a gas having a concentration higher than a set concentration, the operation of the device is stopped and the operation remote controller is operated by any one or combination of light, sound, and display. 48 is configured to notify the abnormality.

  In this case, when the gas detection sensor 34 detects a gas with a concentration higher than the set concentration, the operation of the apparatus is immediately stopped to prevent further gas leakage, and the operation of the apparatus can be performed by any one or combination of light, sound, and display. An abnormality is notified from the remote controller 48 which is operated remotely, and the user is immediately notified of an abnormal increase in gas concentration. Thereby, the gas concentration can be quickly reduced to a safe range.

  Next, modifications of the first embodiment will be described with reference to FIGS. Each of these modified examples is different only in the configuration of the upper portion of the package 33, and the configuration and operation of other parts are the same as those in the first embodiment described above.

  In the modification shown in FIG. 4, the gas detection sensor 34 is attached to the upper part of the package 33, and the upper surface inner wall 46 of the package 33 is formed so as to be inclined upward toward the gas detection sensor 34 side. Yes. That is, the upper surface inner wall 46 here is not horizontal but is inclined, and the gas detection sensor 34 is attached to the uppermost portion of the inclination. In this manner, if the upper surface inner wall 46 of the package 33 is formed to be inclined upward toward the gas detection sensor 34 side, the gas that has reached the upper surface in the package 33 further moves upward along the inclined upper surface inner wall 46. Move and gather. Therefore, the gas leaking into the package 33 can be detected more quickly and accurately by the gas detection sensor 34 disposed at the upper part of the inclined surface.

  In another modification shown in FIG. 5, in addition to the configuration of FIG. 2, a closing plate 51 that opens and closes the ventilation port 50 is provided on the exhaust side of the ventilation fan 35. When a gas leak abnormality occurs and the gas detection sensor 34 detects a gas with a concentration higher than the set concentration, the ventilation port 50 is closed by the closing plate 51, and a large amount of gas leaks outside the package 33 in a short time. I am trying not to.

  That is, in this modification, in the fuel cell device that generates power in the package 33 by the electrochemical reaction between the fuel gas and the oxidant gas, the gas detection sensor 34 that detects the gas concentration in the package 33 is a gas that is equal to or higher than the set concentration. Is detected, the operation of the apparatus is stopped and the ventilation port 50 for ventilating the package 33 is closed.

  In this case, when the gas detection sensor 34 detects a gas having a concentration higher than the set concentration, the operation of the apparatus is immediately stopped, and further leakage of gas is prevented, and the ventilation port 50 for ventilating the package 33 is closed. This can prevent a large amount of gas from leaking out of the package 33 in a short time.

  In a further modification shown in FIG. 6, in addition to the configuration of FIG. 2, a circulation fan 52 for forcibly circulating the air in the package 33 and a gas adsorbent 53 as an adsorbing means such as zeodolite for adsorbing gas components are provided. I have. When a gas leak abnormality occurs and the gas detection sensor 34 detects a gas having a concentration higher than the set concentration, the circulation fan 52 is activated and the air in the package 33 passes through the gas adsorbent 53, and the gas concentration Is quickly reduced.

  That is, in this modification, in the fuel cell device that generates power in the package 33 by the electrochemical reaction between the fuel gas and the oxidant gas, the operation of the device is performed when the gas detection sensor 34 detects a gas having a set concentration or higher. The air in the package 33 is circulated and the gas is adsorbed by the gas adsorbent 53 provided in the air circulation passage.

  In this case, when the gas detection sensor 34 detects a gas having a concentration higher than the set concentration, the operation of the apparatus is immediately stopped to prevent further leakage of the gas, and the air in the package 33 is circulated so as to circulate in the air circulation channel. Gas is adsorbed to the gas adsorbent 53 located in the area. Thereby, the gas concentration can be quickly reduced to a safe range.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same part as the said 1st Example, and since the description of the common location overlaps, it abbreviate | omits.

  The detailed configuration of the fuel cell device is as shown in FIG. 7 and is basically the same as that of the first embodiment, but the configuration around the hot water storage tank 26 that is a liquid storage tank is different. Specifically, 55 is a liquid storage tank section or hot water storage tank section provided separately from the package 33. In addition to the hot water storage tank 26 described above, the hot water (warm liquid) in the hot water storage tank 26 is full. A hot water storage means 56 for releasing the heat of the hot water to the outside, and a hot water flow path switching valve 57 for switching the flow path of the hot water to the hot water storage tank 26 to the heat dissipation means 56 side if necessary. It is configured to be housed inside a casing 58 (see FIGS. 8 and 9) that is an outline of the portion 55.

  The inlet of the heat-receiving-side flow path of the exhaust heat utilization heat exchanger 15 is branched in two directions, one connected to the outlet of the circulation pump 30 and the other through the package city water inlet 59 to the city water shut-off valve 23. Connected. Further, the outlet of the heat receiving side flow path of the exhaust heat utilization heat exchanger 15 is connected to the hot water inlet 27 of the hot water storage tank section 55 via the package hot water outlet 60. Here, the hot water inlet 27 is branched in two directions, one connected to the upper part of the hot water storage tank 26 and the other connected to the inlet of the hot water circulation pipe 61 corresponding to a tubular body. Reference numeral 62 denotes a fin attached to the hot water circulation pipe 61, which is provided at a position facing the blower 63 that sends air to the fin 62. The hot water circulation pipe 61, the fins 62, and the blower 63 constitute a heat radiating means 56 that takes heat from the hot water.

  The outlet of the hot water circulation pipe 61 is connected to one inlet of the hot water flow path switching valve 57, and the other inlet of the hot water flow path switching valve 57 is connected to the cold water outlet of the hot water storage tank 26. One entrance is connected to the exit. The outlet of the hot water flow path switching valve 57 is connected from the cold water outlet 64 of the hot water storage tank section 55 to the inlet of the circulation pump 30 via the package cold water inlet 65. Further, on the outlet side of the circulation pump 30, a hot water temperature sensor 66 for detecting the temperature of the water flowing through the cold water intake 31 is provided. Reference numeral 67 denotes an exhaust gas discharge port for guiding the exhaust gas from the exhaust heat utilization heat exchanger 15 to the ventilation fan 35.

  8 and 9 show the arrangement of the apparatus in this embodiment. In each of these drawings, the internal structure of the package 33 is substantially the same as that shown in FIG. 2 of the first embodiment except that a part of the auxiliary machine 41 is partially divided on the upper part of the fuel reformer 43. Match. The package city water inlet 59, the package cold water inlet 60, and the package hot water outlet 65 are all provided so as to protrude from the outer surface of the package 33, and the package cold water inlet 60 is connected to the cold water outlet 27 of the hot water tank 55, The package hot water outlet 65 is connected to the hot water inlet 64 of the hot water tank section 55. No other piping is provided between the package 33 and the hot water tank 55. Further, a package intake port 73 for taking air into the package 33 is provided at the lower front portion of the package 33.

  A hot water storage tank 26 attached to a hot water storage tank leg 69 is accommodated in the housing 58 constituting the hot water storage tank section 55. Similarly, in the housing 58, a heat radiating means 56 and a hot water flow path switching valve 57 are provided below the hot water storage tank 26. Further, the front surface of the housing 58 is provided with a heat radiating exhaust port 70 as an exhaust port at a position facing the heat radiating means 56, and the rear surface portion of the housing 58 is also suctioned at a position facing the heat radiating means 56. A heat radiating air inlet 71 is provided as a mouth.

  Next, the operation of the above configuration will be described, but the same operation as in the first embodiment will be omitted.

  Regarding the operation of the hot water tank section 55, the interior of the hot water tank 26 is in a two-layer state due to the difference in water temperature as described above, and the hot water is located in the upper layer of the hot water tank 26 and the cold water is located in the lower layer of the hot water tank 26. Yes. However, if the operation is continued without using the hot water, the hot water storage tank 26 is filled with the hot water, and the hot water is discharged from the cold water outlet 29. Therefore, in the exhaust heat utilization heat exchanger 15, the fuel cell 7 The cathode exhaust gas and the burner exhaust gas from the reformer 4 cannot be cooled, so that condensed water cannot be obtained. In the present embodiment, the state where the hot water storage tank 26 is filled with hot water is detected by a hot water temperature sensor 66 or a water level sensor (not shown) for detecting the level of condensed water in the exhaust heat utilization heat exchanger 15. Then, the hot water flow path from the exhaust heat utilization heat exchanger 15 to the hot water storage tank 26 is switched to the heat radiation means 56 side by the hot water flow path switching valve 57.

  When the hot water flow path is switched to the heat dissipating means 56 side, the hot water passes through the hot water circulation pipe 61 of the heat dissipating means 56, the heat of the hot water is transmitted to the fins 62, and the fins 62 are air-cooled by the blower 63. The hot water circulation pipe 61 becomes cold water and is returned to the exhaust heat utilization heat exchanger 15 by the circulation pipe 30. As a result, the cathode exhaust gas from the fuel cell 7 and the burner exhaust gas from the reformer 4 can be cooled by the exhaust heat utilization heat exchanger 15.

  Next, the intake and exhaust of the package 33 and the hot water tank 55 will be described. The package 33 and the hot water tank 55 are both installed with a spatial distance with the back face facing the house. During operation of the device, air is taken in from the package inlet 73 at the lower front of the package 33 and is sent to the equipment for each application by the air blower 11 inside the package 33, and also the package inlet. The air taken in from 73 is replaced with the air in the package 33, cools the inside of the package 33, and is discharged to the outside from the ventilation port 50 as the package exhaust port.

  Further, since the heat dissipating means 56 is provided in the hot water storage tank 55 separately from the package 33, the package 33 does not require the intake / exhaust port of the blower 63 constituting the heat dissipating means 56, and the air blower 11 In addition to the ventilation fan 35 and the like, when the package intake port 73 and the ventilation port 50 are arranged, there is no concern about interference with the intake and exhaust ports of the heat radiating means 56. Therefore, it is possible to obtain an optimal arrangement that can secure the performance of the auxiliary machine 41 in addition to making the package 33 compact.

  In addition, in the hot water storage tank section 55, outside air is taken in from a heat radiating intake port 71 provided on the back surface of the casing 58, and the heat of the fins 62 facing each other is taken away by the blower 63. Then, the warmed outside air is discharged to the outside through a heat radiation exhaust port 70 provided on the front surface of the housing 58. Since the heat dissipating means 56 is located below the hot water storage tank 26, the heat dissipating efficiency of the heat dissipating means 56 is not lowered by the influence of convection even when the hot water tank 26 is filled with hot water.

  In the configuration of this embodiment, since the hot water flow path switching means 57 is housed in the hot water storage tank section 55, only two pipes connecting the package 33 and the hot water storage tank section 55 are required, and the installation work of the apparatus is easy. It has become. Further, the heat radiation intake port 71 is provided on the back surface of the housing 58 and faces the house side, so that it is difficult to suck in foreign matters such as dust, and a decrease in heat radiation efficiency can be prevented.

  Furthermore, in the operating state of the device, the pipes that connect the components in the package 33 are loosened, and flammable or toxic gases such as fuel gas, hydrogen gas, and carbon monoxide gas leak into the package 33. Even if it is a minute amount, it can be discharged outside the package 33 before it becomes dangerous by the ventilation fan 35. Even if the gas concentration in the package 33 does not decrease during normal ventilation with the ventilation fan 35, the density of these gases is lower than that of air, so that the gas accumulates at the top of the package 33 and is further provided on the upper inner wall 47. It collects in the concave portion 47. Therefore, the gas detection sensor 34 attached to the recess 47 can quickly detect a gas leak and can safely stop the apparatus.

  As described above, in the present embodiment, in the fuel cell device that generates power in the package 33 by the electrochemical reaction between the fuel gas and the oxidant gas, the hot water storage tank 26 that stores the heat generated by the power generation as hot water, and the hot water is full. The heat dissipating means 56 that releases heat to the outside of the apparatus when it becomes is disposed in the hot water storage tank section 55 that is provided outside the package 33 independently.

  In this case, the heat radiating means 56 is disposed in the hot water storage tank portion 56 outside the package 33 together with the hot water storage tank 26. That is, there is no heat dissipating means 56 in the package 33, and there is no need to worry about interference with the intake / exhaust of the heat dissipating means 56 when arranging other components in the package 33. The space can be reduced as much as possible, and the outer dimensions of the package 33 can be made compact, and sufficient performance can be secured in the package 33.

  The heat radiating means 56 of the present embodiment includes a hot water circulation pipe 61 as a tubular body for circulating hot water, a fin 62 as a heat radiating portion attached to the hot water circulation pipe 61, and a blower device 63 for sending air to the fin 62. It consists of.

  In this case, the heat transmitted from the hot water circulation pipe 61 through which the hot water passes to the fins 62 is cooled by the wind of the blower 63 and returned as cold water. By increasing the heat radiation area by the fins 62, the hot water can be efficiently cooled.

  In this embodiment, since the heat radiating means 56 is provided below the hot water storage tank 26, even if the hot water storage tank 26 is filled with hot water, it is not affected by convection. Accordingly, it is possible to prevent a decrease in the heat dissipation efficiency of the heat dissipation means 56.

  Further, in this embodiment, the hot water storage tank 26 and the heat radiating means 56 are housed in the casing 58, and the switching means as a valve for switching the hot water flow path to the heat radiating means 56 side, that is, the hot water flow path switching valve 57 is provided in the casing 58. Arranged inside.

  In this case, since the hot water flow path switching valve 57 for switching the flow path of the hot water to the heat radiating means 56 side is provided in the housing 58 outside the package 33 that houses the hot water storage tank 26 and the heat radiating means 56, the housing 58 The piping of the hot water flow path switching valve 57 can be performed in the inside, and piping for connecting the package 33 and the hot water storage tank portion 56 is only required for hot water and cold water. Therefore, installation work can be easily performed.

  Further, in the present embodiment, the hot water storage tank 26 and the heat radiating means 56 are housed in the housing 58, and the heat radiating intake port 70, which is the air intake port of the heat radiating means 56, is provided on the back side of the housing 58, Is provided on the front side of the housing 58.

  In this case, since the heat radiating inlet 70 of the heat radiating means 56 is provided on the rear surface of the housing 58 facing the house side, the opportunity to suck in foreign matter such as dust outside the room is reduced, and heat radiated due to the intrusion of foreign matter is reduced. A decrease in the heat dissipation effect of the means 56 can also be prevented.

  Next, a third embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part same as what was described in the said 1st Example and 2nd Example, Since it overlaps, description of the common location is abbreviate | omitted.

  In FIG. 10 showing the detailed configuration of the fuel cell device, reference numeral 75 denotes a seismic device that also serves as a posture detection device 76 attached to the package 33, and its output signal is sent to the electric control device 44. 77 is an anomaly alarm for notifying the abnormality by any of light, sound, or display when the seismic device 75 or the posture detection device 76 detects an abnormality, which is also attached to the front side of the package 33. It has been. Note that the seismic sensing device 75 may be composed of, for example, an acceleration sensor and an acceleration determination unit, and the posture detection device 76 may be composed of, for example, a posture sensor such as a sphere and a posture determination unit such as a contactless switch.

  Reference numeral 78 denotes an auxiliary fuel gas cylinder that encloses a predetermined amount of fuel gas. A fuel switching valve 79 provided in the middle of a pipeline from the fuel intake 45 to the fuel shutoff valve 4 allows the fuel intake 45 or the auxiliary fuel gas cylinder 78 to be Fuel gas is supplied from either one. Reference numeral 80 denotes a main fuel line shut-off detection device that detects whether or not the supply of fuel gas (main fuel gas) from the fuel intake 45 is shut off. Other than that, it is almost the same as the configuration of the second embodiment described above.

  Next, operation procedures of acceleration (vibration) detection and posture detection will be described with reference to the flowchart of FIG.

  In the figure, when the apparatus is instructed to start up and is operated, first, in step S11, the posture detection device 76 detects the posture of the device body, that is, the package 33. If the inclination of the package 33 is less than the set value (for example, if the tilt angle at which the apparatus main body can be safely operated is 8 degrees, the set value is about 5 degrees smaller than that), step S12. From step S13, the acceleration applied to the package 33 is detected by the seismic device 75. In the next step S14, the acceleration applied to the package 33 is less than the set value (for example, if the acceleration at which the apparatus main body can be safely operated is 200 gal, the set value is about 150 gal which is smaller than that). If there is, the process proceeds to step S15, and the main fuel line shut-off detection device 80 detects whether or not the fuel gas is correctly supplied from the main fuel line passing through the fuel intake 45.

  In step S12 or step S14, if the inclination of the package 33 is greater than or equal to the set value, or if the acceleration applied to the package 33 is greater than or equal to the set value, the process proceeds to step S16, and the electric control device 44 in the package 33 is Prohibit device startup or stop device operation. In addition, as described above, there is a margin in these setting values because the device itself is activated due to the detection error of the seismic device 75 or the posture detection device 76, although the device body is in a dangerous state. This is to avoid continuing driving. At the same time, the abnormality notification device 77 notifies the occurrence of abnormality by light, sound, display, etc. (step S17).

  On the other hand, if the fuel gas is correctly supplied from the main fuel line in step S15, the process proceeds to step S18, where the electric control device 44 switches the fuel switching valve 79 to the main fuel line side, and the main fuel line. The fuel gas is supplied to the main body of the apparatus. On the other hand, when the supply of the fuel gas from the main fuel line is not normal, the routine proceeds to step S19, where the fuel switching valve 79 is switched to the auxiliary fuel gas cylinder 78 side, and the fuel gas is supplied from the auxiliary fuel gas cylinder 78 to the apparatus body. Supply. In any case, the activation of the apparatus is permitted or the operation is continued in the next step S20, and the process returns to the step S11.

  The order in which the posture detection, acceleration detection, and main fuel line cutoff detection are executed is not limited to this embodiment. Here, the seismic device 75 and the posture detection device 76 are combined for detection, but they may be provided separately or only one of them may be provided. The set value is merely an example, and may be changed as appropriate as long as the apparatus main body can be operated safely.

  As described above, in this embodiment, the seismic device 75 is provided in the fuel cell device that generates power by the electrochemical reaction between the fuel gas and the oxidant gas, and the acceleration applied to the device can be detected by the seismic device 75. Even if vibration or external force is applied to the device, the device can be safely protected by the seismic device 75.

Moreover, the seismic device 75 of the present embodiment is configured to detect an acceleration of a predetermined value, for example, 150 gal or more as an abnormality. As a result, when the acceleration applied to the apparatus becomes, for example, 150 gal (150 cm / s ² since 1 gal = 1 cm / s ² ), an abnormality can be detected and the apparatus can be safely protected.

  In addition, the seismic device 75 of the present embodiment is composed of acceleration detecting means that is an acceleration sensor and a control unit that is an acceleration determining unit, and the seismic device 75 itself is abnormal based on the magnitude of acceleration detected by the acceleration sensor. Therefore, the abnormality of the device can be directly determined from the output of the seismic device 75.

  Further, in this embodiment, in the fuel cell device that generates power by the electrochemical reaction between the fuel gas and the oxidant gas, a posture detection device 76 that is a state detection means is provided, and a change in the posture of the device is detected by this posture detection device. Therefore, even if vibration or external force is applied to the device, the device can be safely protected by the posture detection device 76.

  Further, the posture detection device 76 of the present embodiment is configured to detect a predetermined value of, for example, an inclination of 5 degrees or more as an abnormality. Thereby, when the change in the posture of the apparatus is tilted by, for example, 5 degrees or more, an abnormality can be detected and the apparatus can be safely protected.

  In addition, the posture detection device 76 of the present embodiment includes a state detection unit that is a posture sensor and a control unit that is a posture determination unit, and the posture detection device 76 itself is abnormal based on the amount of change in posture detected by the posture sensor. Therefore, it is possible to directly determine the abnormality of the apparatus from the output of the attitude detection apparatus 76.

  Further, in this embodiment, when the seismic sensing device 75 or the posture detection device 76 detects an abnormality, the fuel gas supply is shut off and the operation of the device is stopped. As a result, when the seismic device 75 or the posture detection device 76 detects an abnormality, the fuel gas supply is shut off to prevent gas leakage, and the operation of the device is forcibly stopped to further improve the safety of the device. Can be increased.

  In this embodiment, when the seismic sensing device 75 or the posture detection device 76 detects an abnormality, the abnormality is notified by any one or combination of light, sound, and display. In this case, if the seismic device 75 or the posture detection device 76 detects an abnormality, the abnormality is notified by light, sound, or display or a combination thereof, so that the user can be immediately notified of the abnormality of the device due to vibration or external force. Can do.

  In the present embodiment, the seismic device 75 and the posture detection device 76 are provided as one detection device in the fuel cell device that generates power by the electrochemical reaction between the fuel gas and the oxidant gas. In this case, acceleration applied to the device can be detected by the seismic device 75, and a change in the posture of the device can be detected by the posture detection device 76. Therefore, even if vibration or external force is applied to the device, the device can be safely protected by the seismic device 75 or the posture detection device 76. Further, if at least one of the seismic sensing device 75 or the posture detection device 76 operates normally, an abnormality of the device can be detected, so that safety can be further improved.

  Further, in this embodiment, in the fuel cell device that generates power by the electrochemical reaction between the fuel gas and the oxidant gas, the auxiliary fuel gas cylinder 78 that is a gas cylinder, the main fuel line cutoff detector 80 that is a cutoff detector, The seismic device 75 is provided, and the fuel gas is supplied when the detected acceleration of the seismic device 75 is less than the set acceleration and the fuel supply of the main fuel line detected by the main fuel line shut-off detecting device 80 is stopped. Switching to the auxiliary fuel gas cylinder 78 side and continuing the operation of the device, if the detected acceleration of the seismic sensing device 75 is equal to or higher than the set acceleration, the fuel gas supply is shut off and the operation of the device is stopped. .

  If the detected acceleration of the seismic device 75 is less than the set acceleration, even if the supply of fuel gas from the main fuel line is interrupted, the fuel gas is supplied from the auxiliary fuel gas cylinder and the operation of the device is continued. As a result, even when the system power supply is cut off and the main fuel line is also cut off in the event of a disaster, the operation of the apparatus can be continued and used as an emergency power supply. On the other hand, if the detected acceleration of the seismic device 75 is greater than or equal to the set acceleration, shut off all fuel gas supply and stop the operation of the device. Can be protected safely.

  Further, in this embodiment, the stop of the fuel supply to the main fuel line is detected by the main fuel line shut-off detection device 80 provided in the main fuel line. That is, since the main fuel line shutoff detection device 80 is provided in the main fuel line, it is possible to detect the supply stop of the fuel gas from the main fuel line more directly and reliably.

  The main fuel line shut-off detection device 80 of the present embodiment may be configured by a pressure sensor provided at the fuel inlet of the main fuel line or a flow sensor provided in the fuel flow path. A widely used pressure sensor or flow rate sensor can be used as the main fuel line shutoff detection device 80.

  Next, a fourth embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same part as the said 2nd Example, and since the description of the common location overlaps, it abbreviate | omits.

  12 showing the configuration of the entire apparatus and FIG. 13 showing a perspective view of the package body 33, in this embodiment, the package outlet portion on the outlet side of the exhaust gas outlet 67 connected to the exhaust heat utilization heat exchanger 15 is used. The configuration of 90 is different from that of the second embodiment. That is, the package outlet portion 90 of the exhaust gas discharge port 67 is provided with an open / close mechanism 91 that opens and closes the exhaust gas discharge port 67 and an exhaust gas outlet filter 92, and the exhaust gas in the exhaust gas discharge port 67 is The gas passes through the opening / closing mechanism 91 and the exhaust gas outlet filter 92 sequentially, opens on the side surface of the package 33, and is discharged to the outside of the package 33 from the gas outlet 93 of the exhaust gas discharge port 67 provided in the vicinity of the ventilation fan 35. It has become so. The exhaust gas outlet filter 92 is composed of a relatively coarse mesh that does not allow large foreign substances to enter.

  89 is an exhaust gas mixing section that mixes the combustion exhaust gas discharged from the reformer 4 of the fuel reformer 43 and the cathode exhaust gas discharged from the cathode 9 of the fuel cell 7 and leads them to the exhaust gas outlet 67. is there. In this case, a mixture (mixed gas) of the combustion exhaust gas from the reformer 4 and the cathode exhaust gas from the fuel cell 7 is discharged to the package outlet 90 of the exhaust gas discharge port 67. Exhaust gas mixing section 89 is not provided, exhaust gas outlet 67 is provided corresponding to each of combustion exhaust gas and cathode exhaust gas, and opening / closing mechanism 91 is provided at package outlet 90 of each exhaust gas outlet 67. Good.

  Next, a more detailed configuration of the opening / closing mechanism 91 will be described with reference to FIG. The opening / closing mechanism 91 is provided so as to be rotatable about the rotation shaft 94, and is attached to the rotation shaft 94 of the closure plate 95 for opening and closing the package outlet 90, and transmits a driving force to the rotation shaft 94. And a drive device 97 for driving the transmission mechanism 96. When the apparatus starts operation, the closing plate 95 of the opening / closing mechanism 91 is rotated to a position parallel to the exhaust gas flow F to open the package outlet 90, while when the apparatus stops operating, the closing plate The package outlet portion 90 is closed by turning 95 to a position orthogonal to the flow F of the exhaust gas.

  Next, the operation relating to the opening / closing mechanism 91 will be described with respect to the above configuration. When the operation of the fuel cell device is started, combustion exhaust gas discharged from the reformer 4 and cathode exhaust gas discharged from the fuel cell 7 are generated. Immediately before, the operating force of the driving device 97 is transmitted from the rotating shaft 94 to the closing plate 95 by the transmission mechanism 96, and the closing plate 95 rotates in a direction to open the package outlet portion 90. Thus, the exhaust gas mixed in the exhaust gas mixing unit 89 and further releasing water vapor and heat in the exhaust heat utilization heat exchanger 15 passes through the opening / closing mechanism 91 and the exhaust gas outlet filter 92, and is attached to the package 33. The gas is discharged from the gas outlet 93 to the outside. At this time, the exhaust gas is still slightly higher in temperature than the outside temperature, and the water vapor is close to saturation, but a package exhaust port 50 of the ventilator 35 is provided in the vicinity of the gas outlet 93, and the exhaust gas is exhausted. The gas is immediately diluted by the exhaust from the package exhaust port 50, and is diffused into the atmosphere without condensing the water vapor. Accordingly, it is possible to prevent problems such as generation of white smoke or corrosion of the package 33 due to condensed water droplets when the exhaust gas is released into the atmosphere.

  Thereafter, when the operation of the apparatus is stopped, the generation of the combustion exhaust gas discharged from the reformer 4 and the cathode exhaust gas discharged from the fuel cell 7 are also stopped. Immediately after the generation of these exhaust gases (mixed gas) stops, the closing plate 95 of the opening / closing mechanism 91 rotates in a direction to close the package outlet portion 90. This prevents entry of small insects that can pass through the exhaust gas outlet filter 92 and foreign matters such as dust.

  As described above, in this embodiment, in the fuel cell device that generates power in the package 33 by the electrochemical reaction between the fuel gas and the oxidant gas, the outlet portion facing the package 33 of the cathode exhaust gas discharged from the fuel cell 7. That is, an opening / closing mechanism 91 is provided at the package outlet 90.

  In this case, the cathode outlet gas package outlet 90 from the fuel cell 7 can be opened and closed by the opening / closing mechanism 91 as necessary, so that the fuel cell can be provided without having to bother the outlet with a conventional filter. It is possible to prevent foreign matter from entering 7.

  Further, an opening / closing mechanism 91 may be provided at the outlet portion of the combustion exhaust gas discharged from the fuel reformer 43 as the reformer, that is, the package outlet portion 90. The package outlet 90 of the fuel exhaust gas from the fuel reformer 43 can be opened and closed as necessary by an opening and closing mechanism 91, so that the fuel reforming can be done without having to bother the outlet with a conventional filter. Intrusion of foreign matter into the apparatus 43 can be prevented.

  Furthermore, an opening / closing mechanism 91 may be provided at each of the package outlets 90 of the cathode exhaust gas discharged from the fuel cell 7 and the combustion exhaust gas discharged from the fuel reformer 43. In this case, the package outlet 90 of the cathode exhaust gas from the fuel cell 7 and the package outlet 90 of the fuel exhaust gas from the fuel reformer 43 can be opened and closed by the opening / closing mechanism 91 as necessary. Therefore, entry of foreign matter into the fuel cell 7 and the fuel reformer 43 can be prevented without having to bother covering the outlet with a conventional filter.

  Further, as in this embodiment, an exhaust gas mixing section 89 as a mixing section for mixing the cathode exhaust gas discharged from the fuel cell 7 and the combustion exhaust gas discharged from the fuel reformer 43 is provided in the package outlet section 90. An opening / closing mechanism 91 may be provided in the mixed gas package outlet portion 90 in the middle of the flow path. In this case, the package outlet 90 of the mixed gas obtained by mixing the cathode exhaust gas from the fuel cell 7 and the fuel exhaust gas from the fuel reformer 43 can be opened and closed by the opening / closing mechanism 91 as necessary. Thus, it is possible to prevent foreign matter from entering the fuel cell 7 and the fuel reformer 43 without having to bother covering the outlet with a conventional filter.

  Particularly, in this embodiment, the package outlet 90 is opened by the opening / closing mechanism 91 when the apparatus starts operation, and the package outlet 90 is closed by the opening / closing mechanism 91 when the apparatus stops operation. In this case, since the package outlet portion 90 is opened during operation of the apparatus, the pressure loss of the exhaust gas passage reaching the package outlet portion 90 does not increase. On the other hand, since the package outlet 90 is closed when the operation of the apparatus is stopped, it is possible to reliably prevent entry of foreign matter.

  The opening / closing mechanism 91 of this embodiment includes a rotatable closing plate 95 provided at the package outlet 90, a transmission mechanism 96 as a transmission device attached to the rotating shaft 94 of the closing plate 95, and the transmission mechanism. And a driving device 97 for driving 96. As described above, by moving the closing plate 95 from the driving device 97 via the transmission mechanism 96, the package outlet portion 90 can be easily opened or closed.

  In the fuel cell device that generates power in the package by an electrochemical reaction between the fuel gas and the oxidant gas, both the cathode exhaust gas discharged from the fuel cell 7 and the combustion exhaust gas discharged from the fuel reformer 43 or Either one of the outlet portions, that is, the gas outlet 93, or the outlet portion of the gas obtained by mixing the cathode exhaust gas and the combustion exhaust gas, that is, the gas outlet 93, is in the vicinity of the exhaust port (package exhaust port 50) of the ventilation fan 35 as a ventilation device. May be provided. The exhaust gas from the fuel cell 7 and / or the fuel reformer 43 is somewhat higher in temperature than the outside air temperature, and the water vapor is close to saturation, but when the exhaust gas reaches the gas outlet 93, there is It is immediately diluted by the exhaust from the exhaust port of the ventilation fan 35, and the water vapor diffuses into the atmosphere without condensing. As a result, it is possible to prevent the exhaust gas from the gas outlet 93 from appearing as white smoke or the water droplets from adhering to the package 33 near the gas outlet 93.

  In addition, since the package exhaust port 50 and the gas outlet 93 are provided independently of each other, it is not necessary to consider the influence of back pressure or the like when opening these in the package 33, and design restrictions There is also an advantage that is reduced.

  Further, the cathode exhaust gas discharged from the fuel cell 7 and the combustion exhaust gas discharged from the fuel reformer 43, or either one of the outlet portions, that is, the gas outlet 93, or the cathode exhaust gas and the combustion exhaust gas are mixed. A gas outlet 93 for gas may be provided in the middle of the exhaust passage of the ventilation fan 35. Also in this case, the exhaust gas from the fuel cell 7 and / or the fuel reformer 43 is somewhat higher in temperature than the outside air temperature, and the water vapor is close to saturation, but the exhaust gas enters the gas outlet 93. When it reaches, it is immediately diluted with the exhaust gas passing through the exhaust flow path from the ventilation fan 35, and the water vapor diffuses into the atmosphere without condensing. As a result, it is possible to prevent the exhaust gas from the gas outlet 93 from appearing as white smoke or the water droplets from adhering to the package 33 near the gas outlet 93.

  In this case, since the gas outlet 93 is provided in the exhaust flow path of the ventilation fan 35, the exhaust port of the ventilation fan 35 and the exhaust gas exhaust port are formed in the package 33 in common. Therefore, the appearance of the package 33 is improved as the number of holes is reduced. In addition, there is an advantage that it is only necessary to take measures against entry of foreign matters such as dust.

  The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, although the solid polymer type fuel cell device has been described in each embodiment, other power generation methods such as a molten carbon type and a solid oxide type may be used. In addition, air is sent to the CO selective oxidizer 6 and the burner section of the reformer 4 and the cathode 9 of the fuel cell 7 by a single air blower 11, but separate air blowers may be used. The same applies to the water pipe 18, and water may be supplied to the water vapor generating heat exchanger 21 and the anode 8 of the fuel cell 7 through separate water pipes. Further, regarding the use of exhaust heat, warm water is used in each of the above embodiments, but it may be used for heating, and its use is not limited.

It is a schematic explanatory drawing of the common fuel cell apparatus in 1st Example of this invention. It is a longitudinal cross-sectional view of a fuel cell apparatus same as the above. It is a flowchart which shows a series of procedures regarding a gas leak detection same as the above. It is a longitudinal cross-sectional view of the fuel cell apparatus which shows the modification of 1st Example. It is a longitudinal cross-sectional view of the fuel cell apparatus which shows another modification of 1st Example. It is a longitudinal cross-sectional view of the fuel cell apparatus which shows another modification of 1st Example. It is a schematic explanatory drawing of the common fuel cell apparatus in 2nd Example of this invention. It is a longitudinal cross-sectional view of a fuel cell apparatus same as the above. It is a perspective view of a fuel cell apparatus same as the above. It is a schematic explanatory drawing of the common fuel cell apparatus in 3rd Example of this invention. It is a flowchart which shows a series of procedures regarding acceleration detection and attitude | position detection same as the above. It is a schematic explanatory drawing of the common fuel cell apparatus in 4th Example of this invention. It is a perspective view of a package same as the above. It is sectional drawing which shows an opening / closing mechanism same as the above.

Explanation of symbols

7 Fuel cell
26 Hot water storage tank (liquid storage tank)
33 packages
34 Gas detection sensor (gas detection means)
35 Ventilation fan (ventilator)
47 recess
50 Ventilation port (exhaust port)
53 Gas adsorbent (adsorption means)
55 Hot water storage tank (liquid storage tank)
56 Heat dissipation means
57 Hot water flow path switching valve (switching means)
58 Enclosure
61 Hot water circulation pipe
62 Fin (heat dissipation part)
63 Blower
70 Heat dissipation inlet (inlet)
71 Heat exhaust port (exhaust port)
75 Seismic device
76 Posture detection device (status detection device)
78 Auxiliary fuel gas cylinder (gas cylinder)
80 Main fuel line shutoff detector (shutoff detector)
89 Exhaust gas mixing section (mixing section)
90 Package outlet (exit)
91 Opening / closing mechanism
93 Gas outlet (exit part)
95 Blocking plate (blocking means)
96 Transmission mechanism (transmission device)
97 Drive unit

Claims (29)

In a fuel cell device that generates power in a package by an electrochemical reaction between a fuel gas and an oxidant gas, the operation of the device is stopped when the gas detection means detects a concentration higher than a set concentration, and the gas detection means is set A fuel cell device configured to operate a ventilator that performs ventilation until a concentration below the level is detected. In a fuel cell device that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, when the gas detection means detects a concentration above a set concentration, the operation of the device is stopped and the ventilation port for ventilation is closed. A fuel cell device characterized by comprising: In a fuel cell device that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, when the gas detection means detects a concentration above a set concentration, the operation of the device is stopped and the air in the package is circulated to flow. A fuel cell device characterized in that an adsorbing means is provided in a path. In a fuel cell device that includes an operation unit for remotely controlling the operation of the apparatus and a gas detection means, and that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, the gas detection means detects a set concentration or more. The fuel cell device is characterized in that the operation of the device is stopped and the notification is made by any one or combination of light, sound, and display. In a fuel cell device that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, a liquid storage tank for storing warm liquid and a heat radiating means for releasing heat are disposed in an external liquid storage tank section. A fuel cell device. 6. The fuel cell device according to claim 5, wherein the heat dissipating means includes a tube that circulates a liquid, a heat dissipating part attached to the tube, and a blower that sends air. 6. The fuel cell device according to claim 5, wherein the heat dissipating means is provided in a lower portion of the liquid storage tank. 6. The fuel cell device according to claim 5, wherein the liquid storage tank and the heat radiating means are housed in a casing, and a flow path switching means is arranged in the casing. 6. The fuel cell device according to claim 5, wherein the liquid storage tank and the heat radiating means are housed in a housing, and an intake port and an exhaust port are provided in the housing. A fuel cell device for generating electricity by an electrochemical reaction between a fuel gas and an oxidant gas, wherein a seismic device is provided. 11. The fuel cell device according to claim 10, wherein the seismic sensing device detects an acceleration of a predetermined value or more as an abnormality. 11. The fuel cell device according to claim 10, wherein the seismic sensing device includes an acceleration detection means and a control unit. A fuel cell device for generating power by an electrochemical reaction between a fuel gas and an oxidant gas, wherein a state detection device is provided. 14. The fuel cell device according to claim 13, wherein the state detection device detects an inclination greater than a predetermined value as an abnormality. 14. The fuel cell device according to claim 13, wherein the state detection device includes a state detection unit and a control unit. The fuel cell device according to claim 10 or 13, wherein when the seismic device or the state detection device detects an abnormality, the gas is shut off and the operation of the device is stopped. 14. The fuel cell device according to claim 10 or 13, wherein when the seismic device or the state detection device detects an abnormality, a notification is given by light, sound, display, or a combination thereof. . A fuel cell device that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, wherein the seismic sensing device and the state detection device are provided as one device. In a fuel cell device that generates power by an electrochemical reaction between a fuel gas and an oxidant gas, a gas cylinder, a shut-off detection device, and a seismic device are provided, the seismic device is less than a set acceleration, and fuel supply is stopped. In such a case, the fuel cell device is configured such that the operation of the device is continued and the operation of the device is stopped when the seismic sensing device is equal to or higher than a set acceleration. 20. The fuel cell device according to claim 19, wherein the stop of fuel supply is detected by the shutoff detection device. 21. The fuel cell device according to claim 19 or 20, wherein the shut-off detection device is constituted by pressure detection means or flow rate detection means. A fuel cell device that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, wherein the cathode exhaust outlet has an opening / closing mechanism. A fuel cell device that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, wherein an open / close mechanism is provided at a combustion exhaust outlet. In a fuel cell device that generates power by an electrochemical reaction between a fuel gas and an oxidant gas, an open / close mechanism is provided at each of the cathode exhaust and combustion exhaust outlets discharged from the fuel cell. . In a fuel cell device that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, a mixing portion that mixes cathode exhaust and combustion exhaust discharged from the fuel cell is provided in a flow path, and an outlet portion of the mixing portion is provided. A fuel cell device provided with an opening / closing mechanism. The fuel cell device according to any one of claims 22 to 25, wherein the outlet portion is opened when the device starts operation, and the outlet portion is closed when the device stops operation. . 27. The opening / closing mechanism comprises a closing means provided at the outlet, a transmission device for the closing means, and a drive device for driving the transmission device. The fuel cell device described in 1. In a fuel cell device that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, the cathode exhaust and / or combustion exhaust discharged from the fuel cell, or either one of the outlets, or the cathode exhaust and the combustion exhaust are mixed. A fuel cell device characterized in that a gas outlet is provided in the vicinity of a ventilation device. In a fuel cell device that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, the cathode exhaust and / or combustion exhaust discharged from the fuel cell, or either one of the outlets, or the cathode exhaust and the combustion exhaust are mixed. A fuel cell device, wherein a gas outlet is provided in an exhaust part of a ventilator.

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