JP2017216201A - Fuel cell system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fuel cell system capable of sufficiently reducing temperature/humidity of exhaust gas from a fuel cell.SOLUTION: A fuel cell system 10 comprises: a fuel cell 12; a device frame 11 that accommodates the fuel cell 12 and has an exhaust hole 11A; and an exhaust device 100 for discharging exhaust gas EG from the fuel cell 12 to the outside of the device frame 11 through the exhaust hole 11A. The exhaust device 100 comprises: a radiator cooling fan 104 that is provided inside the device frame 11 so as to face the exhaust hole 11A and sends air to the outside of the device frame 11 through the exhaust hole 11A; an exhaust pipe 102 that introduces the exhaust gas EG from the fuel cell 12 to an air sending region 104A of the radiator cooling fan 104; and a stirring mechanism 106 that is arranged so as to face the radiator cooling fan 104 interposing a position where the exhaust gas EG is introduced to the air sending region 104A by the exhaust pipe 102, and stirs air sent from the radiator cooling fan 104 and the exhaust gas EG introduced through the exhaust pipe 102.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fuel cell system.

  As a package type fuel cell power generation device, one that exhausts from a fuel cell is mixed with air blown from a ventilation fan and then released outside the package is known (see, for example, Patent Documents 1 and 2).

JP-A-8-293316 JP-A-9-223510

  If the exhaust from the fuel cell becomes hot and humid, the temperature and humidity of the exhaust from the fuel cell will drop sufficiently if the exhaust from the fuel cell and the air blown from the ventilation fan are not sufficiently stirred. In addition, there is a problem that condensation occurs in the exhaust path.

  The problem to be solved by the present invention is to provide a fuel cell system capable of sufficiently reducing the temperature and humidity of the exhaust gas from the fuel cell.

[1] A fuel cell system according to the present invention includes a fuel cell, a housing that houses the fuel cell and has an exhaust hole, and exhausts exhaust from the fuel cell to the outside of the housing through the exhaust hole. A fuel cell system comprising an exhaust device, wherein the exhaust device is provided inside the housing so as to face the exhaust hole and blows air toward the outside of the housing through the exhaust hole; An exhaust pipe that introduces the exhaust from the fuel cell into a blower area of the blower, and an exhaust pipe introduced to the blower area by the exhaust pipe so as to face the blower, and the blower And an agitation mechanism for agitating the exhaust air introduced from the exhaust pipe and the exhaust gas introduced by the exhaust pipe.

[2] In the above invention, the exhaust blow-out direction of the exhaust pipe may coincide with the blow-out direction of the blower.

[3] In the above invention, the outlet of the exhaust pipe and the stirring mechanism may be arranged at the center of the blowing area.

[4] In the above invention, the exhaust device may include a casing in which the stirring mechanism is provided.

[5] In the above invention, the stirring mechanism may be a rotating blade provided rotatably.

[6] In the above invention, the stirring mechanism may be a fixed blade provided in a fixed state.

  According to the present invention, the exhaust from the fuel cell and the air from the blower can be sufficiently mixed, so that the temperature and humidity of the exhaust from the fuel cell can be sufficiently reduced.

FIG. 1 is a diagram showing a schematic configuration of a fuel cell system according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 and shows a distribution of exhaust gas between the outlet of the exhaust pipe and the stirring mechanism. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1 and shows a distribution of exhaust gas immediately after being discharged out of the apparatus housing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a schematic configuration of a fuel cell system 10 according to an embodiment of the present invention. As shown in this figure, the fuel cell system 10 is a system for supplying electric power to an external load (not shown), and includes a fuel cell 12, a fuel tank 14, a fuel pump 16, a blower 18, The condenser 20, the water tank 22, the water pump 23, the external fuel tank 24, the external fuel pump 26, the exhaust treatment device 28, the radiator 30, and the exhaust device 100 are provided. In this fuel cell system 10, a fuel cell 12, a fuel tank 14, a fuel pump 16, a blower 18, a condenser 20, a water tank 22, a water pump 23, an exhaust treatment device 28, a radiator 30, Is accommodated in the apparatus casing 11, and the external fuel tank 24 and the external fuel pump 26 are installed outside the apparatus casing 11.

  The fuel cell 12 is a power generation device in which a power generation cell 121 that is a direct methanol fuel cell (DMFC) is stacked. The fuel cell 12 is used as a power source for households and industries, and an external load (not shown). To supply power. The fuel cell 12 includes a plurality of stacked power generation cells 121, a pair of current collectors 122 that sandwich the plurality of power generation cells 121 in the stacking direction, and the power generation cells 121 and the pair of current collectors 122. And a pair of end plates 123 sandwiched in the stacking direction.

  The fuel cell 12 includes a fuel supply port 12A, an air supply port 12B, a fuel discharge port 12C, and an air discharge port 12D. The fuel supply port 12 </ b> A communicates with the fuel tank 14 via the fuel pump 16. The air supply port 12 </ b> B communicates with the outside of the system via the blower 18. The fuel discharge port 12 </ b> C communicates with the fuel tank 14. Further, the air discharge port 12 </ b> D communicates with the water tank 22 via the condenser 20.

  The fuel tank 14 stores a methanol aqueous solution (MeOH) diluted to several weight%. When the system is activated, an aqueous methanol solution is supplied from the fuel tank 14 to the anode (fuel electrode) through the fuel supply port 12A by the fuel pump 16, and external air is supplied to the cathode (air) through the air supply port 12B by the blower 18. Poles).

At the anode, as shown by the following formula (1), carbon dioxide, hydrogen ions, and electrons are generated by an oxidation reaction with a catalyst. The electrons generated at the anode pass through an external circuit, whereby electric power is supplied to an external load such as an electronic device on the user side. On the other hand, hydrogen ions generated at the anode move to the cathode through the polymer electrolyte membrane. At the cathode, as shown by the following formula (2), water is generated by a reduction reaction of oxygen by the catalyst.
CH ₃ OH + H ₂ O → CO ₂ + 6H ⁺ + 6e ⁻ (1)
3 / 2O ₂ + 6H ⁺ + 6e ⁻ → 3H ₂ O (2)

  Unreacted methanol and carbon dioxide generated in the fuel cell 12 are discharged from the fuel discharge port 12 </ b> C and returned to the fuel tank 14. The methanol returned to the fuel tank 14 remains in the fuel tank 14, while the carbon dioxide returned to the fuel tank 14 is released to the outside of the system. The water vapor generated in the fuel cell 12 is discharged from the air discharge port 12 </ b> D and liquefied in the condenser 20.

  The condenser 20 is a heat exchanger and is supplied with cooling water from the radiator 30. The condenser 20 cools and liquefies the water vapor discharged from the air discharge port 12D. The water generated in the condenser 20 is supplied to the water tank 22. The radiator 30 is disposed so as to face the exhaust hole 11 </ b> A of the apparatus housing 11.

  The water tank 22 contains water and communicates with the fuel tank 14 via the water pump 23. The external fuel tank 24 contains a high-concentration methanol aqueous solution and communicates with the fuel tank 14 via an external fuel pump 26. A high-concentration aqueous methanol solution in the external fuel tank 24 is supplied to the fuel tank 14 by the external fuel pump 26, and water in the water tank 22 is supplied to the fuel tank 14 by the water pump 23. A methanol aqueous solution diluted to a concentration of wt% is accommodated in the fuel tank 14.

  Here, the discharge from the anode contains unreacted liquid fuel (water and methanol) as liquid phase components and carbon dioxide and incomplete anode oxide as gas phase components. This incomplete anode oxide contains formaldehyde and formic acid, which are by-produced as a reaction intermediate without methanol being completely oxidized. Further, the discharge from the cathode mainly contains water as a liquid phase component, and unreacted air and incomplete cathode oxide as a gas phase component. This incomplete cathode oxide includes carbon dioxide produced by the oxidation reaction of methanol permeated from the anode to the cathode, and formaldehyde and formic acid that are by-produced as reaction intermediates without methanol being completely oxidized. ing.

  Therefore, the gas phase component discharged from the fuel discharge port 12C or the air discharge port 12D (hereinafter referred to as exhaust EG from the fuel cell 12) contains incomplete anode oxide or incomplete cathode oxide. It is necessary to purify the exhaust EG from the fuel cell 12. Here, the exhaust EG from the fuel discharge port 12C flows to the water tank 22 via the fuel tank 14, and the exhaust EG from the air discharge port 12D flows to the water tank 22 via the condenser 20. The water tank 22 communicates with the outside through the exhaust device 100. Therefore, in the fuel cell system 10 according to the present embodiment, the exhaust treatment device 28 is provided in the exhaust path 32 that allows the water tank 22 and the exhaust device 100 to communicate with each other, and the exhaust treatment device 28 causes the exhaust EG from the fuel cell 12 to flow. Purified.

  The exhaust treatment device 28 includes a reaction unit 281 and an adsorption unit 282. The reaction unit 281 has a function of oxidizing incomplete oxide contained in the exhaust EG and converting it into water and carbon dioxide. As the oxidant used for the oxidation reaction of the exhaust EG, air (oxygen) supplied to the fuel cell 12 by the blower 18 and discharged without contributing to the reaction in the fuel cell 12 is used. In the reaction unit 281, in addition to the incomplete oxide, unreacted methanol vapor that is accompanied by the exhaust EG and enters the exhaust treatment device 28 is oxidized and decomposed into water and carbon dioxide.

  As such a reaction section 281, a stainless mesh structure, a honeycomb structure, or a laminate of foam metal or the like carrying a catalyst is used. As the catalyst, a catalyst that can be used for the oxidation reaction of methanol vapor or incomplete oxide in a relatively low temperature state (for example, 50 ° C.) is preferable. Specifically, a catalyst in which platinum fine particles are supported on a carbon carrier is used. it can.

  The adsorbing unit 282 has a function of adsorbing an inhibitor that inhibits the reaction of the above formulas (1) and (2) of the fuel cell 12. Inhibitors include trace amounts of nitrogen oxides (NO, NOx), sulfur oxides (SOx), ammonia, hydrogen sulfide, organic solvents such as organic solvent vapor and tar, which are contained in the air supplied to the cathode of the fuel cell 12, And carbon monoxide. When such an obstacle enters the fuel cell 12, the electrode catalyst is poisoned and deteriorates, and the life of the fuel cell 12 is shortened. Therefore, in the fuel cell system 10 of the present embodiment, the adsorption part 282 adsorbs and removes the inhibitor to prevent the obstacle from entering the fuel cell 12 and prevent the electrode catalyst from being poisoned. Longer service life is realized. As such an adsorbing portion 282, a porous body such as activated carbon can be used.

  Here, when the exhaust EG from the fuel cell 12 is purified by the catalytic reaction of the reaction unit 281 of the exhaust treatment device 28, the exhaust EG of the fuel cell 12 is heated to high temperature and high humidity (for example, 100 ° C., humidity 100%). Become. This high-temperature and high-humidity exhaust EG reaches the exhaust device 100 through an exhaust path 32 including an exhaust pipe 102 described later. The exhaust device 100 has a function of releasing the exhaust EG from the fuel cell 12 to the outside of the device housing 11 with the temperature and humidity being lowered. Hereinafter, the exhaust device 100 will be described.

  The exhaust device 100 includes an exhaust pipe 102 that constitutes a downstream side of the exhaust path 32, a radiator cooling fan 104, a stirring mechanism 106, and a casing 108. The upstream end of the exhaust pipe 102 is connected to the exhaust port of the exhaust treatment device 28, and the downstream end of the exhaust pipe 102 is arranged in a blower area (area indicated by hatching in the drawing) 104 A of the radiator cooling fan 104. Yes.

  The radiator cooling fan 104 is disposed between the radiator 30 and the exhaust hole 11A of the apparatus housing 11 so as to face the core surface of the radiator 30 and the exhaust hole 11A. The radiator cooling fan 104 cools the radiator 30 by sending air from the inside to the outside of the apparatus housing 11 through the exhaust hole 11A. The radiator cooling fan 104 of the present embodiment is a propeller-type axial fan, and is arranged so that the rotation axis is orthogonal to the core surface of the radiator 30. The air volume of the radiator cooling fan 104 is controlled according to the temperature of the fuel cell 12, the outside air temperature, the temperature inside the apparatus housing 11, and the like.

  The stirring mechanism 106 is a propeller-type axial fan, and is disposed so as to face the radiator cooling fan 104. Further, the stirring mechanism 106 and the radiator cooling fan 104 are arranged coaxially, and the rotation axis of the stirring mechanism 106 and the extension line of the rotation axis of the radiator cooling fan 104 coincide with each other. Thereby, the stirring mechanism 106 is positioned at the center of the air blowing area 104 </ b> A of the radiator cooling fan 104. Here, the rotation radius of the stirring mechanism 106 is set smaller than the rotation radius of the radiator cooling fan 104. In the present embodiment, the rotation radius of the stirring mechanism 106 is set to ½ or less of the rotation radius of the radiator cooling fan 104.

  The casing 108 is formed in an annular shape so as to surround the air blowing region 104 </ b> A of the radiator cooling fan 104 from the viewpoint of promoting stirring and mixing of the exhaust EG and the air blowing W. A stirring mechanism 106 is disposed on the axial center of the casing 108.

  Here, the downstream end 102 </ b> A (hereinafter referred to as a blowout port) of the exhaust pipe 102 is arranged at the center of the blowing area 104 </ b> A of the radiator cooling fan 104 toward the blowing direction of the radiator cooling fan 104 and the rotation center of the stirring mechanism 106. ing. In the present embodiment, the exhaust pipe 102 extends from the side of the air blowing area 104 </ b> A to the center of the air blowing area 104 </ b> A and is bent toward the air blowing direction and the rotation center of the stirring mechanism 106.

  In the exhaust device 100, high-temperature and high-humidity exhaust gas EG is blown out from the outlet 102 </ b> A of the exhaust pipe 102 toward the stirring mechanism 106 between the radiator cooling fan 104 and the stirring mechanism 106. Since the air outlet 102A of the exhaust pipe 102 is arranged at the center of the air blowing area 104A, the high-temperature and high-humidity exhaust gas EG immediately after being blown out from the air outlet 102A is concentrated at the center of the air W from the radiator cooling fan 104. To do. The temperature of the air blow W of the radiator cooling fan 104 is about 20 ° C. higher than room temperature, and is lower than the exhaust EG blown out from the blowout port 102A. Further, the humidity of the blowing air W of the radiator cooling fan 104 is lower than the humidity of the exhaust gas EG blown out from the outlet 102A. That is, in the exhaust device 100, the high-temperature and high-humidity exhaust gas EG immediately after being blown out from the air outlet 102A is concentrated at the center of the blower W that is low-temperature and low-humidity compared to the exhaust gas EG. That is, the exhaust gas EG is concentrated on the center of the blower W so as to be wrapped with the blower W (see FIG. 2).

  The exhaust gas EG concentrated on the center of the air blow W of the radiator cooling fan 104 is dispersed over a wide range in the air blowing area 104A by the stirring mechanism 106 when passing through the stirring mechanism 106. As a result, the exhaust EGW in which the high-temperature and high-humidity exhaust EG and the air blow W that is low-temperature and low-humidity compared with the exhaust EG are mixed and released to the outside of the apparatus housing 11 (see FIG. 3). The exhaust EGW released to the outside of the apparatus housing 11 becomes low temperature and low humidity as compared with the exhaust EG immediately after being blown out from the outlet 102A.

  FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 and shows a distribution of exhaust gas between the outlet 102A and the stirring mechanism 106. As shown in this figure, between the air outlet 102A and the stirring mechanism 106, the high-temperature and high-humidity exhaust EG occupies a wide range at the center of the blower W that is low-temperature and low-humidity as compared with the exhaust EG.

  FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1 and shows the distribution of the exhaust gas immediately after being discharged out of the apparatus housing 11. As shown in this figure, on the downstream side of the stirring mechanism 106, the ratio of the high-temperature and high-humidity exhaust EG to the entire exhaust becomes lower than that between the outlet 102A and the stirring mechanism 106, and the exhaust EG The ratio of the exhaust EGW mixed with the air blow W to the entire exhaust becomes high.

  On the other hand, when the stirring mechanism 106 is not provided, the high-temperature and high-humidity exhaust EG is discharged outside the apparatus housing 11 while being concentrated in the center of the blower W (that is, the state shown in FIG. 2). The That is, the high-temperature and high-humidity exhaust EG is discharged outside the apparatus housing 11 without being sufficiently mixed with the blower W. For this reason, the high-temperature and high-humidity exhaust EG collides with an exhaust hood or the like existing outside the casing 108, and dew condensation occurs on an object existing outside the casing 108 such as the exhaust hood.

  As described above, in the exhaust device 100 of the fuel cell system 10 according to the present embodiment, the radiator cooling fan 104 is provided so as to face the exhaust hole 11A of the device housing 11, and the device housing is passed through the exhaust hole 11A. The exhaust pipe 102 introduces the exhaust gas EG from the fuel cell 12 into the air blowing area 104 </ b> A of the radiator cooling fan 104. The agitating mechanism 106 is disposed so as to face the radiator cooling fan 104 across the position where the exhaust gas EG is introduced into the air blowing area 104A by the exhaust pipe 102, and the air W and the exhaust pipe 102 from the radiator cooling fan 104 are arranged. The exhaust EG introduced by the above is stirred. As a result, the high-temperature and high-humidity exhaust EG blown out from the outlet 102A of the exhaust pipe 102 and the blower W from the radiator cooling fan 104, which is low-temperature and low-humidity compared to the exhaust EG, are sufficiently mixed, The exhaust EGW with reduced humidity can be discharged to the outside of the casing 108. Therefore, the dew condensation caused by the collision of the high-temperature and high-humidity exhaust EG in the exhaust hood or the like existing outside the casing 108 can be suppressed.

  Further, in the exhaust device 100 of the fuel cell system 10 according to the present embodiment, the exhaust EG blowing direction of the exhaust pipe 102 and the blowing direction of the radiator cooling fan 104 are the same. As a result, it becomes easy to control the distribution of exhaust gas between the radiator cooling fan 104 and the stirring mechanism 106 so that the exhaust air EG is wrapped in the air blow W at the center of the blower W, and the exhaust EG goes to the stirring mechanism 106. Thus, it becomes easy to set the positional relationship between the exhaust EG and the stirring mechanism 106. Therefore, the high-temperature and high-humidity exhaust EG blown from the outlet 102A of the exhaust pipe 102 and the blower W of the radiator cooling fan 104 existing so as to wrap the exhaust EG are further blown by the exhaust EGW by the stirring mechanism 106. The agitation can be performed so as to be dispersed over a wide area in the region 104A, and the temperature and humidity of the mixed exhaust EGW discharged to the outside of the casing 108 can be further reduced.

  Here, the air volume of the radiator cooling fan 104 is controlled according to the temperature of the fuel cell 12, the outside air temperature, or the like (for example, according to the detection value of a sensor arranged in the vicinity of the radiator cooling fan 104). It is not preferable that the exhaust efficiency of the radiator cooling fan 104 is reduced by the exhaust gas EG introduced from the exhaust pipe 102 to the blowing area 104A of the radiator cooling fan 104. Therefore, in the exhaust device 100 of the fuel cell system 10 according to the present embodiment, the exhaust gas introduced into the blower region 104A is made to coincide with the blowing direction of the exhaust EG in the exhaust pipe 102 and the blowing direction of the radiator cooling fan 104. The EG suppresses a reduction in the exhaust efficiency of the radiator cooling fan 104, and suppresses a decrease in the accuracy of the air volume control of the radiator cooling fan 104.

  Further, by arranging the outlet 102A of the exhaust pipe 102 in the air blowing area 104A of the radiator cooling fan 104, the exhaust EG blown out from the outlet 102A is directed toward a sensor provided in the vicinity of the radiator cooling fan 104. It can be prevented from flowing. Accordingly, erroneous detection of the sensor temperature can be prevented, and a decrease in the accuracy of air flow control of the radiator cooling fan 104 can be suppressed.

  Further, in the exhaust device 100 of the fuel cell system 10 according to the present embodiment, the exhaust EG blown out from the air outlet 102A is provided by arranging the air outlet 102A of the exhaust pipe 102 in the center of the air blowing region 104A of the radiator cooling fan 104. However, it concentrates in the center of the ventilation area | region 104A of the radiator cooling fan 104. FIG. Then, by arranging the stirring mechanism 106 at the center of the air blowing area 104A, the exhaust EG concentrated at the center of the air blowing area 104A passes through the position of the stirring mechanism 106. As a result, the exhaust gas EG is not concentrated on the outside of the air blowing area 104A, but tends to be concentrated on the center of the air blowing area 104A so as to be wrapped by the air blowing W. For this reason, the high-temperature and high-humidity exhaust EG and the blower W of the radiator cooling fan 104 that is low-temperature and low-humidity as compared with the exhaust EG can be more effectively stirred, and the mixture discharged to the outside of the casing 108 It becomes possible to further reduce the temperature and humidity of the exhaust EGW. Moreover, it is possible to suppress the high-temperature and high-humidity exhaust EG from colliding with the inner peripheral wall surface of the casing 108, and it is possible to suppress dew condensation that occurs on the inner peripheral wall surface of the casing 108.

  Further, in the exhaust device 100 of the fuel cell system 10 according to the present embodiment, the agitation mechanism 106 is a rotary blade that is rotatably provided in the air blowing region 104A of the radiator cooling fan 104, so that the energy by rotation is exhausted EG Since it can be applied to the air blow W, the wind speed of the exhaust EG and the air blow W can be improved. Therefore, it is possible to further improve the stirring performance of the exhaust EG and the blower W.

  Since the stirring mechanism 106 is provided inside the casing 108, the exhaust EG and the air blow W discharged by the stirring mechanism 106 in the outer peripheral direction collide with the inner wall surface of the casing 108. It becomes easy to be mixed. Therefore, the exhaust EGW can be discharged to the outside of the casing 108 with the temperature and humidity being further reduced. Further, the exhaust EG and the air blow W that collide with the inner wall surface of the casing 108 can easily flow toward the center of the exhaust device 100. Therefore, the exhaust EG and the air W flowing from the inner wall surface of the casing 108 toward the center of the air blowing area 104A collide with the air exhaust EG and the air W flowing through the center of the air blowing area 104A. Accordingly, since the exhaust EG and the air blow W are more easily mixed, the exhaust EGW can be discharged to the outside of the casing 108 with the temperature and humidity being further reduced.

  Here, when the rotation radius of the agitating mechanism 106 is set to be greater than or equal to the rotation radius of the radiator cooling fan 104, the air blow W from the radiator cooling fan 104 and the exhaust EG from the fuel cell 12 rotate in the same phase. And may be released to the outside without being sufficiently mixed with each other. On the other hand, when the rotation radius of the stirring mechanism 106 is set smaller than the rotation radius of the radiator cooling fan 104, the stirring mechanism 106 mainly stirs the exhaust EG and makes it difficult to stir the blower W. The air blow W from the radiator cooling fan 104 and the exhaust EG from the fuel cell 12 are swirled in mutually different phases, and can be discharged to the outside in a sufficiently mixed state. For this reason, it becomes possible to obtain more excellent stirring performance.

  The “fuel cell system 10” in the present embodiment corresponds to an example of the “fuel cell system” in the present invention, and the “fuel cell 12” in the present embodiment corresponds to an example of the “fuel cell” in the present invention. The “apparatus housing 11” in the present embodiment corresponds to an example of the “container” in the present invention, and the “exhaust hole 11A” in the present embodiment corresponds to an example of the “exhaust hole” in the present invention. The “exhaust device 100” in the embodiment corresponds to an example of the “exhaust device” in the present invention, and the “exhaust EG” in the present embodiment corresponds to an example of “exhaust from the fuel cell” in the present invention.

  The “radiator cooling fan 104” in the present embodiment corresponds to an example of the “blower” in the present invention, and the “air blowing area 104A” in the present embodiment corresponds to an example of the “air blowing area” in the present invention. The “air blow W” in the embodiment corresponds to an example of “air blow from the blower” in the present invention, and the “exhaust pipe 102” in the present embodiment corresponds to an example of the “exhaust pipe” in the present invention. The “blowing port 102A” in FIG. 1 corresponds to an example of the “exhaust pipe blowing port” in the present invention, and the “stirring mechanism 106” in the present embodiment corresponds to an example of the “stirring mechanism” in the present invention.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, the fuel cell system 10 according to the above-described embodiment includes the direct methanol fuel cell 12 and the exhaust treatment device 28 that processes the exhaust EG from the fuel cell 12, but the exhaust from the fuel cell is the system. The present invention can be applied to any fuel cell system that is hot and humid before reaching the outside. That is, the fuel cell 12 is not limited to the direct methanol type, and may be another fuel cell such as a solid polymer type fuel cell using hydrogen as a fuel. It is not essential to provide the exhaust treatment device 28.

  In the fuel cell system 10 according to the above-described embodiment, the radiator cooling fan 104 is a blower. However, the present invention is not limited to this, and a ventilation fan that ventilates the inside of the apparatus housing 11 may be a blower. Further, it is not essential that the direction in which the exhaust EG is blown out from the exhaust pipe 102 coincides with the direction in which the radiator cooling fan 104 blows, and the exhaust EG blown out from the exhaust pipe 102 is blown by the blower W from the radiator cooling fan 104. The exhaust direction of the exhaust gas EG from the exhaust pipe 102 and the blowing direction of the radiator cooling fan 104 may cross each other. Further, it is not essential to place the exhaust EG blowing position from the exhaust pipe 102 and the stirring mechanism 106 at the center of the air blowing area 104A of the radiator cooling fan 104. The exhaust EG blown out from the exhaust pipe 102 is not necessarily disposed in the radiator cooling fan. It is only necessary to be supplied to the agitation mechanism 106 by the blast W of 104, and the exhaust EG blowing position from the exhaust pipe 102 and the installation position of the agitation mechanism 106 are shifted from the center of the blast area 104 </ b> A of the radiator cooling fan 104. Also good.

  Further, in the fuel cell system 10 according to the above-described embodiment, the stirring mechanism 106 is a propeller type axial flow fan, but may be a rotary blade having another configuration such as a propeller type mixed flow fan or the like. It may be a fixed blade or a rotating blade in a stopped state. When the stirring mechanism 106 is a fixed blade, it is preferably provided inside the casing 108. In such a case, it may be provided in a fixed state at the exhaust port of the casing 108. Here, in the case where the stirring mechanism 106 is a fixed blade, the exhaust EG is splashed to the outside of the exhaust device 100 along the extending direction of the fixed blade and is mixed into the air blow W from the radiator cooling fan 104. Is done. Further, when the stirring mechanism 106 is a rotating blade rotated by the exhaust EG and the blower W, a rotating blade in a stopped state, or a fixed blade, a motor and a driving device are not necessary, and further, these are driven. Therefore, it is possible to obtain a fuel cell system that is reduced in size and weight and reduced in power consumption.

DESCRIPTION OF SYMBOLS 10 ... Fuel cell system 11 ... Apparatus housing | casing 11A ... Exhaust hole 11A
DESCRIPTION OF SYMBOLS 12 ... Fuel cell 12A ... Fuel supply port 12B ... Air supply port 12C ... Fuel discharge port 12D ... Air discharge port 121 ... Power generation cell 122 ... Current collector 123 ... End plate 14 ... Fuel tank 16 ... Fuel pump 18 ... Blower 20 ... Condenser 22 ... Water tank 23 ... Water pump 24 ... External fuel tank 26 ... External fuel pump 28 ... Exhaust treatment device 281 ... Reaction unit 282 ... Adsorption unit 30 ... Radiator 32 ... Exhaust path 100 ... Exhaust device 102 ... Exhaust pipe 102A ... Air outlet 104 ... Radiator cooling fan 104A ... Air blowing area 106 ... Agitation mechanism 108 ... Casing EG ... Exhaust W ... Air blow EGW ... Mixed exhaust

Claims (6)

A fuel cell;
A container containing the fuel cell and having an exhaust hole;
An exhaust device that exhausts exhaust from the fuel cell to the outside of the housing through the exhaust hole, and a fuel cell system comprising:
The exhaust device is
A blower that is provided inside the container so as to face the exhaust hole and blows air toward the outside of the container through the exhaust hole;
An exhaust pipe for introducing the exhaust from the fuel cell into a blower area of the blower;
A stirring mechanism that is arranged to face the blower across the position where the exhaust is introduced into the blower area by the exhaust pipe, and stirs the blown air from the blower and the exhaust introduced by the exhaust pipe; A fuel cell system provided. The fuel cell system according to claim 1,
A fuel cell system in which a direction in which the exhaust from the exhaust pipe is blown out coincides with a direction in which the blower blows air. The fuel cell system according to claim 1 or 2,
The fuel cell system in which the outlet of the exhaust pipe and the stirring mechanism are arranged in the center of the blowing area. The fuel cell system according to any one of claims 1 to 3,
The exhaust device is a fuel cell system including a casing in which the stirring mechanism is provided. The fuel cell system according to any one of claims 1 to 4, wherein
The fuel cell system, wherein the stirring mechanism is a rotating blade provided rotatably. The fuel cell system according to any one of claims 1 to 4, wherein
The fuel cell system, wherein the stirring mechanism is a fixed blade provided in a fixed state.

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