JP4458889B2 - Fuel reformer storage container and fuel reformer - Google Patents

Description

  The present invention relates to a fuel reformer for constituting a fuel reformer using a fuel reformer that generates hydrogen gas from a variety of fuels using a steam reforming reaction that is an endothermic catalytic reaction, for example, in a fuel cell system The present invention relates to a storage container and a fuel reformer.

  In recent years, fuel cell systems have been in the limelight as next-generation power systems that produce electric energy efficiently and cleanly. In the cogeneration power generation system market, which is already represented by the automobile market and household fuel cell power generation systems. In the field, field tests for practical application aiming at low cost are actively conducted.

  More recently, the fuel cell system has been reduced in size and is being studied for use as a power source for portable devices such as mobile phones, PDAs (Personal Digital Assistants), notebook computers, digital video cameras, and digital still cameras.

  In general, a fuel cell uses, for example, a hydrocarbon gas such as methane or natural gas (CNG) or an alcohol such as methanol or ethanol as a fuel. A fuel reformer using a fuel reformer uses a steam reforming reaction to generate hydrogen gas and After reforming to other gas, power is generated by supplying this hydrogen gas to a power generation device called a power generation cell.

  The reforming of the fuel by the fuel reformer here refers to a process in which reformable fuel is combined with water vapor to generate hydrogen gas by a catalytic reaction.

For example, when methanol is used as a fuel, a steam reforming reaction as shown in the following chemical reaction formula (1) (in formula (1), steam is combined with methanol to form hydrogen and carbon dioxide. This refers to a process of generating hydrogen gas (H ₂ ) by a reforming reaction). Note that a very small amount of product gas (mainly CO ₂ ) other than hydrogen produced by this reforming reaction is usually discharged into the atmosphere.

CH ₃ OH + H ₂ O → 3H ₂ + CO ₂ (1)
Further, since such a steam reforming reaction is an endothermic reaction, it is necessary to maintain the reaction temperature by heating from the outside with a heater or the like. Therefore, in order to reform the fuel in the fuel reformer, for example, methanol was used as the fuel in order to prevent the steam reforming activity of the catalyst from being lowered and to maintain a high concentration of generated hydrogen gas. In some cases, a temperature of about 200 to 500 ° C. is required, and in the case of using methane gas, a high temperature of about 300 to 800 ° C. is required.
JP 2003-2602 A

  In recent years, it has been proposed to mount a fuel cell system on a small portable device. For this purpose, it is necessary to reduce the size and height of the fuel cell device.

Furthermore, when the fuel cell system is mounted on a portable device, the heat generated in the fuel reformer is transferred to the fuel reformer storage container, and the temperature of the surface of the fuel reformer storage container rises. May adversely affect other parts in the portable device.

  Further, since the steam reforming reaction as shown in the chemical reaction formula (1) is an endothermic reaction, in order to reform the fuel with the fuel reformer, the fuel reformer is heated with a heater or the like. It is necessary to maintain the reaction temperature at a constant temperature. However, the heat generated in the fuel reformer is conducted to the fuel reformer storage container, so that the temperature of the fuel reformer decreases. Therefore, in order to maintain the reaction temperature, it is necessary to increase the heating value of the heater. Increasing the heating value of the heater increases the electric capacity used for heating the heater in the total electric capacity generated by the power generation cells of the fuel cell, and as a result, the power generation loss of the entire fuel cell system increases. There was a point.

  The present invention has been completed in view of the above-described problems in the prior art, and its purpose is to supply fuel to the fuel reformer satisfactorily, as well as hydrogen gas reformed by the fuel reformer, etc. The reformed gas can be safely discharged out of the fuel reformer storage container, and the heat generated in the fuel reformer is effectively suppressed from being transferred to the fuel reformer storage container, thereby improving the power generation efficiency. It is an object of the present invention to provide a fuel reformer storage container and a fuel reformer that can be mounted on a high and small portable device.

Fuel reformer housing container of the present invention comprises a container for housing the fuel reformer to generate a reformed gas from a fuel therein, the tip is joined to the fuel reformer, the fuel reformer A fuel reformer storage container having a supply pipe for supplying the fuel to the fuel reformer and a discharge pipe for discharging the reformed gas, the tip of which is joined to the fuel reformer. The container has a cavity provided between an inner surface and an outer surface thereof, and a gas suction port provided on the inner surface so as to communicate with the cavity .

In the fuel reformer storage container of the present invention, preferably, the storage container is characterized in that an internal pressure of the cavity is 10 Pa or less.

In the fuel reformer storage container of the present invention, preferably, the storage container is characterized in that the width of the cavity in a direction perpendicular to the inner and outer surfaces is 0.5 mm to 5 mm .

In the fuel reformer storage container according to the present invention, preferably, the storage container includes a base body having a concave portion on an upper surface and a lid body attached to the upper surface of the base body so as to cover the concave portion, and the cavity is It is provided on at least one of the base and the lid.

A fuel reformer of the present invention comprises the above-described container for housing a fuel reformer of the present invention and the fuel reformer disposed inside the container .

In the fuel reformer of the present invention, preferably, the internal pressure of the container is 10 Pa or less.

Fuel reformer housing container of the present invention comprises a container for housing the fuel reformer to generate a reformed gas from a fuel therein, the tip is joined to the fuel reformer, the fuel reformer A fuel reformer storage container having a supply pipe for supplying the fuel to the fuel reformer and a discharge pipe for discharging the reformed gas, the tip of which is joined to the fuel reformer. The container has a cavity formed between the inner surface and the outer surface, and a gas suction port provided on the inner surface so as to communicate with the cavity. The heat can be effectively insulated by this, and the heat conduction from the fuel reformer to the outer surface of the base body and the lid can be greatly reduced, so that the temperature of the outer surface of the fuel reformer storage container rises. Can be effectively suppressed. As a result, it is possible to effectively prevent other parts in the portable device from being adversely affected.

Further, when the fuel reformer is floated and fixed in the container, the supply pipe and the discharge pipe do not require the entire back surface of the fuel reformer to be directly joined to the inside of the container. It is possible to effectively suppress the heat of the mass device from being transmitted to the base body or the lid. As a result, the fuel reformer can be insulated to suppress the temperature drop of the fuel reformer, and a large amount of electric power is supplied to the heater to maintain the temperature necessary for operating the fuel reformer well. There is no need to continue, and the power generation efficiency can be significantly improved.

Furthermore, since all the gas suction ports for decompressing the inside of the cavity formed in the storage container are formed in the fuel reformer storage container, the gas suction port protrudes from the outer surface of the fuel reformer storage container. However, the height of the fuel reformer storage container can be reduced, and as a result, a fuel reformer storage container and a fuel reformer that can be mounted on a small portable device can be provided.

Further, when there is no gas suction port on the outer surface of the fuel reformer storage container, it is possible to effectively suppress the heat from being dissipated to the outside through the gas suction port and the temperature of the fuel reformer being lowered.

  Furthermore, if the inside of the fuel reformer storage container is also decompressed to the same internal pressure as the inside of the cavity, even if the gas suction port is broken and opened, the fuel reformer storage container and the cavity have the same internal pressure. Therefore, the airtightness of the fuel reformer storage container and the cavity is maintained, and the suppression of heat conduction from the fuel reformer to the outer surface of the fuel reformer storage container can be favorably maintained.

The fuel reformer storage container according to the present invention preferably has the above-described configuration, and since the storage container has an internal pressure of 10 Pa or less in the cavity, the molecular density of the gas in the cavity can be reduced. The amount of heat conduction between the inner surface and the outer surface of the interposed substrate can be effectively reduced. As a result, the heat transferred from the fuel reformer to the container can be reduced more effectively, the temperature drop of the fuel reformer can be suppressed, and the power generation loss can be further reduced. It is possible to more effectively suppress the increase in the temperature of the container.

The fuel reformer storage container according to the present invention preferably has the above-described configuration, and the storage container is small in size and transfers heat to the outside because the width of the cavity in the direction perpendicular to the inner and outer surfaces is 0.5 mm to 5 mm. It can be a difficult fuel reformer storage container, and the mechanical impact can be well absorbed by the cavity, greatly reducing the direct transfer of impact into the fuel reformer storage container. Can do. As a result, the operational reliability of the fuel reformer accommodated in the fuel reformer storage container can be improved.

Since the fuel reformer of the present invention comprises the fuel reformer storage container of the present invention and a fuel reformer disposed inside the storage container, the fuel reformer of the present invention is provided. Gas such as hydrogen gas reformed by the fuel reformer, which has the characteristics of a storage container, can be safely discharged out of the fuel reformer storage container, and power generation loss is reduced.

The fuel reforming apparatus of the present invention is preferably in the above configuration, since the internal pressure of the container is 10Pa or less, it is possible to enhance the heat insulating effect of the fuel reformer accommodating container, accommodating a fuel reformer Since the heat transferred to the vessel can be further effectively reduced, it is not necessary to continue to supply a large amount of power to the heater for maintaining the temperature necessary for the fuel reformer to operate well, further improving the power generation efficiency. It can be significantly improved.

  Embodiments of the fuel reformer storage container of the present invention will be described in detail below.

  FIG. 1 is a sectional view showing an example of an embodiment of a fuel cell storage container according to the present invention. 1 is a base, 2 is a lead terminal as a wiring, 3 is a bonding wire, 4 is a lid, 5a is a supply pipe as a supply path for supplying fuel, 5b is a discharge pipe as a discharge path for discharging reformed gas, 7 is an electrode, 8 is an insulating sealing material for sealing and fixing the lead terminal 2 to the through hole 11 of the base body 1 while insulating, 9 is a fuel reformer, and 10 is a gas suction port. 1, the fuel reformer housing container 12 for housing the fuel reformer 9 is constituted by the lid body 4, the supply pipe 5a and the discharge pipe 5b.

The base body 1 and the lid 4 in the fuel reformer storage container of the present embodiment both serve as containers for storing the fuel reformer 9. They are, for example Fe alloy, oxygen-free copper, or a metal material such as SUS, aluminum oxide _(Al 2 _{O 3)} sintered material, mullite _{(3Al 2 O 3 · 2SiO 2} ) sintered material, silicon carbide (SiC ) Sintered material, aluminum nitride (AlN) material, silicon nitride (Si ₃ N ₄ ) material, ceramic materials such as glass ceramics.

In addition, when the base | substrate 1 and the cover body 4 consist of glass ceramics, as glass ceramics applicable to the base | substrate 1 and the cover body 4, what consists of a glass component and a filler component is used, for example. As the glass component, for example, SiO ₂ —B ₂ O ₃ system, SiO ₂ —B ₂ O ₃ —Al ₂ O ₃ system, SiO ₂ —B ₂ O ₃ —Al ₂ O ₃ —MO system (where M is Ca, Sr, Mg, Ba or Zn), SiO ₂ —Al ₂ O ₃ —M ¹ O—M ² O system (where M ¹ and M ² are the same or different and Ca, Sr, Mg, Ba or Zn), SiO ₂ —B ₂ O ₃ —Al ₂ O ₃ —M ¹ O—M ² O system (where M ¹ and M ² are the same as above), SiO ₂ —B ₂ O ₃ — M ³ ₂ O system (where M ³ represents Li, Na or K), SiO ₂ —B ₂ O ₃ —Al ₂ O ₃ —M ³ ₂ O system (where M ³ is the same as above) , Pb glass, Bi glass and the like.

Examples of the filler component include a composite oxide of Al ₂ O ₃ , SiO ₂ , ZrO ₂ and an alkaline earth metal oxide, a composite oxide of TiO ₂ and an alkaline earth metal oxide, Al ₂ O _3. And composite oxides containing at least one selected from SiO ₂ (for example, spinel, mullite, cordierite) and the like.

A cavity S is formed in at least one of the base body 1 and the lid body 4 in the fuel reformer storage container of the present embodiment . Thereby, heat can be effectively insulated and heat conduction from the fuel reformer 9 to the outer surface of the base body 1 and the lid body 4 can be greatly reduced, so that the outer surface of the fuel reformer storage container 12 can be reduced. Thus, it is possible to effectively suppress the temperature rise. As a result, it is possible to effectively prevent other parts in the portable device from being adversely affected .

  For example, when the base 1 and the lid 4 are formed of a dense aluminum oxide sintered body having a relative density of 95% or more, for example, first, rare earth oxide powder or aluminum oxide is added to the aluminum oxide powder. A sintering aid such as powder is added and mixed to prepare a raw material powder of the aluminum oxide sintered body. Next, an organic binder and a dispersion medium are added to this raw material powder, mixed to form a paste, and this paste is green by a doctor blade method, or an organic binder is added to the raw material powder, and press forming, rolling forming, etc. A sheet is produced. Thereafter, through holes serving as cavities S are provided in a specific green sheet, and a predetermined number of sheet-like molded bodies are aligned and laminated and pressure-bonded. Then, the laminated body has a maximum firing temperature of 1200 in a non-oxidizing atmosphere, for example. Firing is performed at a temperature of ˜1500 ° C. to obtain the target ceramic substrate 1 and lid 4. The base 1 and the lid 4 may be molded by a powder molding press method. Further, after forming the ceramic fired body having the recesses, the base body 1 and the lid body 4 having the cavity S may be formed by joining so as to close the recesses with another ceramic fired body.

  When the base 1 and the lid 4 are made of a metal material, the end portions of the two molded bodies formed in a predetermined shape by a cutting method, a press method, a MIM (Metal Injection Mold) method, or the like are used as brazing materials. The base body 1 and the lid body 4 having the cavity S inside are obtained by joining them by the welding method.

  In order to prevent corrosion, the base body 1 and the lid body 4 are preferably subjected to coating treatment such as Au or Ni plating or resin coating such as polyimide on the surfaces thereof. For example, in the case of Au plating treatment, the thickness is desirably about 0.1 to 5 μm.

  Further, by covering at least the inner surface of the fuel reformer storage container 12 composed of the base body 1 and the lid 4 with a plating film of Au or Al, the radiant heat generated in the stored fuel reformer 9 is generated. This can be prevented efficiently, and the temperature rise of the fuel reformer storage container 12 can be suppressed.

  The base body 1 and the lid body 4 may have an internal pressure of the cavity S of 10 Pa or less. Thereby, since the molecular density of the gas in the cavity S can be lowered, the amount of heat conduction between the inner surface and the outer surface of the substrate 1 through the cavity S can be effectively reduced. As a result, the heat transferred from the fuel reformer 9 to the base body 1 and the lid 4 can be reduced more effectively, and the temperature drop of the fuel reformer 9 can be suppressed and the power generation loss can be further reduced. At the same time, the high temperature of the fuel reformer storage container 12 can be more effectively suppressed.

  In addition, in the base body 1 and the lid body 4, the width of the cavity S in the direction perpendicular to the inner and outer surfaces is preferably 0.5 mm to 5 mm. Thus, the fuel reformer storage container 12 which is small and hardly transfers heat to the outside can be obtained, and the mechanical shock can be satisfactorily absorbed by the cavity S. It is possible to greatly reduce the direct transmission of impact to As a result, the operational reliability of the fuel reformer 9 accommodated in the fuel reformer storage container 12 can be improved. Further, when the heat insulation effect is enhanced by making the cavity S low and close to vacuum, even if the base body 1 and the lid body 4 are slightly deformed, the contact between the inner and outer surfaces of the base body 1 and the lid body 4 is suppressed, Since a stable structure can be maintained, the suppression of heat conduction from the fuel reformer 9 to the outer surface of the base body 1 and the lid body 4 can be favorably maintained.

  The cavity S of the base body 1 may be formed in a part of the base body 1 or may be formed so as to cover the entire periphery of the recess. For example, it is formed at the bottom or the side so as to be parallel to the inner and outer surfaces of the base 1, or continuously to the bottom and the side of the base 1 and parallel to the inner and outer surfaces, as if it has a double structure. It may be formed.

In the fuel reformer storage container of the present embodiment, a gas suction port 10 for decompressing the inside of the cavity S is formed at a portion of the base body 1 and the lid 4 on the fuel reformer 9 side. The gas suction port 10 can maintain airtightness in the cavity S by sucking the gas in the cavity S of the base body 1 and the lid 4 to a desired internal pressure and then being closed.

  The gas suction port 10 is joined to the opening edge of the through hole 11 connected to the cavity S on the main surface of the base body 1 and the lid body 4 on the fuel reformer 9 side so as to communicate with the through hole 11, or the through hole 11 is a cylindrical member fitted and joined to the fuel reformer 9, and its end on the fuel reformer 9 side protrudes from the main surface of the base body 1 and the lid 4 on the fuel reformer 9 side. Such a gas suction port 10 is made of, for example, a metal such as Cu or Al, or an alloy such as an Fe—Ni alloy, an Fe—Ni—Co alloy, or a SUS alloy. Preferably, a soft material such as Cu or Al is preferable. When the gas suction port 10 is made of a soft material such as Cu or Al, the gas suction port 10 is appropriately deformed even if stress due to a difference in thermal expansion coefficient occurs between the base 1 or the lid 4 and the gas suction port 10. By doing so, stress can be relieved, and breakage such as cracks can be effectively prevented from occurring in the substrate 1 and the lid 4.

  The method of joining the gas suction port 10 to the base body 1 or the lid body 4 is, for example, when the base body 1 or the lid body 4 is a metal or alloy material, the main surface of the base body 1 or the lid body 4 on the fuel reformer 9 side. A method of joining a tubular gas suction port 10 having a length of about 100 mm at the opening edge of the through-hole 11 to the base 1 or the lid 4 by welding or brazing can be mentioned. At this time, the through holes 11 provided in the base body 1 and the lid body 4 must be placed so as to be on the fuel reformer 9 side, that is, the inside of the fuel reformer storage container 12.

  Next, the end of the gas suction port 10 is connected to a vacuum pump, and the inside of the cavity S is depressurized by exhausting the gas components in the cavity S provided in the base body 1 and the lid 4 to obtain a desired internal pressure. Can do.

  Then, after the pressure value in the cavity S reaches a desired value, the vicinity of the center of the gas suction port 10 (the part protruding from the main surface of the base body 1 or the lid 4 on the fuel reformer 9 side) is pressed. To block the cavity S from the outside. You may cut | disconnect the unnecessary part of a front-end | tip rather than the press-contact part of the gas suction opening 10 as needed. Further, the airtightness can be further improved by covering the cut surface with a brazing material or the like.

  The gas suction port 10 may be blocked by not only the above-described pressure contact but also a brazing material or a resin adhesive.

  The inner diameter of the gas suction port 10 is preferably 0.1 mm or more in diameter (φ). When the inner diameter is less than φ0.1 mm, it takes a long time to decompress the inside of the cavity S, which may impair productivity.

  Further, in the gas suction port 10, a portion that is blocked by pressure contact among the portions that protrude from the main surface of the base body 1 or the lid 4 on the fuel reformer 9 side is preferably narrowed over the entire circumference. As a result, pressure welding is facilitated, and deformation of the gas suction port 10 due to pressure welding is reduced, so that it is possible to effectively prevent distortion stress due to deformation. Therefore, even if the gas suction port 10 becomes high temperature due to heat generated by the operation of the fuel reformer 9, it is possible to effectively prevent the pressure contact portion from being peeled off due to distortion of the pressure contact portion.

  Also, the inside of the fuel reformer storage container 12 may be decompressed to have the same internal pressure as that in the cavity. Thereby, even if the gas suction port 10 is broken and opened, the fuel reformer storage container 12 and the cavity S have the same internal pressure, so that the airtightness of the fuel reformer storage container 12 and the cavity S is maintained. Thus, it is possible to satisfactorily maintain the suppression of heat conduction from the fuel reformer 9 to the outer surface of the fuel reformer storage container 12.

Next, the lead terminal 2 in the fuel reformer storage container according to the present embodiment is preferably made of a metal that is the same as or close to the thermal expansion coefficient of the base 1 and the lid 4, for example, an Fe—Ni alloy. , Fe-Ni-Co alloy can prevent thermal strain from occurring in response to temperature changes during practical use. In addition, a good sealing property between the lead terminal 2 and the substrate 1 can be obtained, the bonding property is excellent, and the strength necessary for mounting and good solderability and weldability can be secured.

The insulating sealing material 8 in the fuel reformer storage container according to the present embodiment is made of, for example, borosilicate glass, alkali glass, insulating glass containing lead as a main component, and the like, and is formed in the base 1. The base 1 and the lead terminal 2 are electrically insulated by the insulating sealing material 8 in the hole, and the lead terminal 2 is sealed and fixed. The through-hole through which the lead terminal 2 formed in the base body 1 is inserted needs to have a size such that the base body 1 and the lead terminal 2 do not come into electrical contact with each other. An inner diameter that can ensure a distance of 0.1 mm or more from the base 1 to the base 1 is preferable.

  The insulating sealing material 8 may be made of an insulating member such as ceramics or glass such as an aluminum oxide sintered body. In this case, for example, a cylindrical insulating sealing material 8 is inserted into a through hole formed in the base 1, and the lead terminal 2 is further inserted into the insulating sealing material 8, whereby the base 1, the lead terminal 2, Can be electrically insulated. It should be noted that the bonding between the insulating sealing material 8 and the substrate 1 and the bonding between the insulating sealing material 8 and the lead terminal 2 may use a brazing material such as an Au—Ge alloy or an Ag—Cu alloy. it can.

  Then, the electrode 7 on the fuel reformer 9 and the lead terminal 2 are electrically connected via the bonding wire 3, and the recess of the base body 1 is sealed with the lid body 4, thereby reforming the fuel. A fuel reformer is formed in which the fuel reformer 9 accommodated in the recess of the container storage container 12 is hermetically sealed.

Further, the fuel reformer 9 accommodated in the fuel reformer accommodating container 12 of the present embodiment applies a semiconductor manufacturing technique as a fine chemical device, for example, a semiconductor such as silicon, quartz, glass, A liquid channel is created by forming a narrow groove on a substrate of an inorganic material such as ceramics by a cutting method, an etching method, a blasting method, etc. For the purpose of preventing evaporation of the liquid during operation, etc. The cover is made to adhere to the surface by anodic bonding, brazing or the like.

  In the fuel reformer 9, a temperature adjusting mechanism, for example, a thin film heater (not shown) made of a resistance layer or the like is formed, and an electrode 7 is formed on the surface as a terminal for supplying electric power to the thin film heater. By adjusting the temperature condition to about 200 to 800 ° C. corresponding to the fuel reforming condition by this temperature adjusting mechanism, the fuel supplied from the fuel supply port to which the supply pipe 5a is connected is combined with the steam, and the modification is made. The reforming reaction for generating hydrogen gas from the discharge pipe 5b connected to the quality gas discharge port can be favorably promoted.

  The fuel reformer 9 is accommodated in a recess of the base 1 and the lid 4 is recessed on the upper surface of the base 1 by joining with a metal brazing material such as Au alloy, Ag alloy, Al alloy, or a glass material, or by a seam weld method. By covering and attaching, the fuel is stored in the fuel reformer storage container 11.

  For example, when the lid 4 is joined to the base body 1 with an Au—Sn brazing material, an Au—Sn brazing material is welded to the lid 4 in advance, or a frame shape is formed by punching using a mold or the like. After the Au—Sn brazing material formed on the substrate 1 is placed between the base body 1 and the lid body 4, the lid body 4 is joined to the base body 1 by a sealing furnace or a seam welder. The fuel reformer 9 can be sealed inside 12.

  In the fuel reformer 9, the electrode 7 on the fuel reformer 9 is electrically connected to the lead terminal 2 provided on the substrate 1 through the bonding wire 3. Thereby, the heater formed on the fuel reformer 9 can be heated through the electrode 7. As a result, the reaction temperature can be maintained in the fuel reformer 9, and the fuel reforming reaction can be stabilized.

The supply pipe 5a and the discharge pipe 5b are a supply path for raw materials and fuel gas fluid and a discharge path for reformed gas containing hydrogen, respectively. These include, for example, Fe-Ni alloy, Fe-Ni-Co alloy, a metal material such as SUS, _Al 2 _{O 3} sintered _material, 3Al ₂ O 3 · 2SiO ₂ sintered material, SiC sintered material, It is formed of a ceramic material such as an AlN sintered body, a Si ₃ N ₄ sintered body, a glass ceramic sintered body, a high heat-resistant resin material such as polyimide, or glass.

  Preferably, it is difficult to be embrittled by hydrogen contained in the reformed gas. Such materials include Fe alloys, ceramics, and glass.

  The opening area of the discharge pipe 5b is preferably larger than the opening area of the discharge hole of the fuel reformer 9. The resistance of the reformed gas flow from the fuel reformer 9 to the discharge pipe 5b can be reduced, and the reformed gas can be smoothly discharged from the fuel reformer 9 to greatly improve the efficiency of fuel reforming. Can be made.

Joining of the supply pipe 5a, and the substrate 1 and the bonding of the discharge pipe 5b unit minute is supply pipe 5a and the discharge pipe 5b, the material constituting the substrate 1, an ultrasonic bonding or thermal welding, bonding, by the resin adhesive Various methods such as adhesion, bonding with a brazing material such as Au-Si and Ag-Cu, bonding with glass such as borosilicate glass, and simultaneous sintering are appropriately used.

  The inner diameters of the supply pipe 5a and the discharge pipe 5b are preferably set to φ0.1 mm or more so as to suppress the pressure loss of the fluid and to be φ5 mm or less for miniaturization and low profile.

  The cross-sectional shapes of the supply pipe 5a and the discharge pipe 5b may be generally circular, but are not limited thereto. That is, besides the circular shape, an elliptical shape or a rectangular shape whose side can be matched with the fluid flow direction, for example, a square shape, a rectangular shape, or the like can be given. Also, the wall thickness must be such that it cannot be deformed by the pressure of raw material supply or reaction gas discharge, and when it is made of a metal material such as Fe-Ni alloy, Fe-Ni-Co alloy, SUS, etc. Usually, what is necessary is just 0.1 mm or more. Further, the length in the flow direction is preferably as long as possible to make it difficult for heat generated in the fuel reformer 9 to be transmitted to the power generation cell, but it should be taken into consideration in consideration of the size of the entire fuel cell system.

  Further, the supply pipe 5a and the discharge pipe 5b are formed with a plurality of grooves parallel to the axial direction or a plurality of grooves perpendicular to the axial direction on the outer surface of the portion inside the fuel reformer storage container 12. Is good. As a result, the heat conduction of the supply pipe 5a and the discharge pipe 5b can be reduced to more effectively suppress the heat conduction from the fuel reformer 9 to the base body 1 and the lid body 4, and the supply pipe 5a and the discharge pipe 5b can be appropriately controlled. And the stress can be relieved by appropriate deformation of the supply pipe 5a and the discharge pipe 5b, the joint between the supply pipe 5a and the discharge pipe 5b and the fuel reformer 9, and the supply pipe It is possible to favorably maintain the joint of the joint portion between the base 5 or the discharge pipe 5b and the base body 1 or the lid body 4.

  In addition, this invention is not limited to the example of the above embodiment, A various change may be added in the range which does not deviate from the summary of this invention. For example, in the example shown in FIG. 1, the fuel pipe 5a and the discharge pipe 5b are joined to the lower surface of the fuel reformer 9, but these are joined to the upper surface according to the specifications of the fuel reformer 9. Also good. A plurality of supply pipes 5a and discharge pipes 5b may be formed.

It is sectional drawing which shows an example of embodiment of the container for fuel reformer accommodation of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base | substrate 4 ... Lid body 5a ... Supply pipe 5b ... Discharge pipe 9 ... Fuel reformer 10 ... Gas inlet 12 ... ..Fuel reformer storage container S ... Cavity

Claims (6)

  A container for accommodating a fuel reformer for generating reformed gas from the fuel; a supply pipe for supplying the fuel to the fuel reformer, the tip of which is joined to the fuel reformer; A fuel reformer storage container having a discharge pipe for discharging the reformed gas, the tip of which is joined to the fuel reformer, wherein the storage container has an inner surface and an outer surface; And a gas suction port provided in the inner surface so as to communicate with the cavity.   2. The fuel reformer storage container according to claim 1, wherein an internal pressure of the cavity is 10 Pa or less.   3. The fuel reformer storage container according to claim 1, wherein a width of the cavity in the direction perpendicular to the inner and outer surfaces of the storage container is 0.5 mm to 5 mm. The storage container is composed of a base body having a concave portion on the upper surface and a lid attached to the upper surface of the base body so as to cover the concave portion,
The fuel reformer storage container according to any one of claims 1 to 3 , wherein the cavity is provided in at least one of the base body and the lid. A fuel reformer comprising the fuel reformer storage container according to any one of claims 1 to 4 and the fuel reformer disposed inside the storage container. apparatus. 6. The fuel reformer according to claim 5, wherein an internal pressure of the container is 10 Pa or less.

Images