WO2008069007A1 - 流体制御弁および燃料電池システム - Google Patents
流体制御弁および燃料電池システム Download PDFInfo
- Publication number
- WO2008069007A1 WO2008069007A1 PCT/JP2007/072052 JP2007072052W WO2008069007A1 WO 2008069007 A1 WO2008069007 A1 WO 2008069007A1 JP 2007072052 W JP2007072052 W JP 2007072052W WO 2008069007 A1 WO2008069007 A1 WO 2008069007A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pressure chamber
- valve
- control valve
- fluid control
- pressure
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention relates to a fluid control valve that includes a two-dimensional valve body having a drive shaft, blocks or connects the inside of a flow path by displacement in the axial direction of the drive shaft, and a fuel cell system including the fluid control valve.
- the fuel cell system includes a fuel cell that generates electricity by an electrochemical reaction of a reaction gas between a fuel gas and an oxidizing gas book, a gas supply channel for supplying the reaction gas to the fuel cell, and discharges the reaction gas from the fuel cell. And a gas discharge channel. It is also conceivable to provide a fuel cell on-off valve corresponding to the fluid control valve in the gas supply channel and the gas discharge channel.
- a valve body having a column part is provided, and gas is generated by axial displacement of the column part.
- the flow path can be blocked or connected.
- This fuel cell on-off valve is divided into two chambers by a diaphragm.
- Such an open / close valve is provided in a hydrogen discharge section for discharging hydrogen discharged from the fuel cell, and two on / off valves are branched from the air supply passage for supplying air to the fuel cell. It is connected to one of the rooms.
- a coil spring is provided in the other of the two chambers, and the coil spring opens the other chamber and urges the valve body to discharge the discharged hydrogen.
- the housing is divided into three chambers by two diaphragms connected to the valve body. The opening of the valve can be adjusted according to the supply air pressure introduced into the pressure-regulating chamber of the three chambers, the spring pressure, and the hydrogen gas pressure. ing.
- the central chamber is an atmospheric pressure chamber. Since positive pressure acts on the two chambers on both sides, the force to drive the valve body by introducing the supply air pressure to the pressure regulating chamber of the two chambers, and the pressure of the two chambers The force that drives the valve body by the pressure of the hydrogen gas existing in the discharge hydrogen discharge chamber acts in the opposite direction. For this reason, there is still room for improvement in terms of improving the response of the valve drive.
- An object of the present invention is to improve responsiveness to the drive of a valve in a fluid control valve and a fuel cell system. Disclosure of the invention
- a fluid control valve is a fluid control valve that includes a valve body having a drive shaft, and shuts off or connects the inside of the flow path by displacement in the axial direction of the drive shaft.
- the drive shafts are separated from each other.
- This fluid control valve is characterized by being driven by both the second force acting by the pressure difference between the pressure chamber 4 and the second force.
- one of the first pressure chamber, the second pressure chamber, the third pressure chamber, and the fourth pressure chamber is a flow path that is blocked or connected by a valve body.
- a force for communicating one pressure chamber of the first pressure chamber and the second pressure chamber with one pressure chamber of the third pressure chamber and the fourth pressure chamber, Each is open to the atmosphere.
- any two pressure chambers of the first pressure chamber, the second pressure chamber, the third pressure chamber, and the fourth pressure chamber are mutually inside. Not communicating with
- one of the first pressure chamber and the second pressure chamber is a flow path that is blocked or connected by a valve body, and the first pressure chamber
- the other pressure chamber of the second pressure chamber is opened to the atmosphere
- one of the third pressure chamber and the fourth pressure chamber is added by the same type of fluid as the fluid flowing in the flow path.
- the other pressure chamber of the third pressure chamber and the fourth pressure chamber is opened to the atmosphere.
- the first pressure chamber, the second pressure chamber, the third pressure chamber, and the fourth pressure chamber be opened in a normal state in which all the pressures are the same.
- a normally open shirt valve that is in a valve state.
- the first pressure chamber, the second pressure chamber, the third pressure chamber, and the fourth pressure chamber be elastic in a normal state in which all are at the same pressure.
- a normally closed shut valve that is closed by the elasticity of the applying means is driven in the direction in which the drive shaft is opened by the first and second forces acting in the same direction.
- the fluid control valve is used as a fuel cell on-off valve provided in a flow path for flowing an oxidizing gas-based gas or a fuel gas-based gas.
- the opening area of the flow path can be adjusted.
- the member constituting the first pressure chamber and the member constituting the second pressure chamber are made of different metals.
- the fuel cell system is a fuel cell system including a fuel cell that generates electric power by electrochemical reaction between an oxidizing gas and a fuel gas.
- An on-off valve for a fuel cell provided in a flow path for flowing an oxidizing gas or a fuel gas A fuel cell system comprising the fluid control valve described above.
- the drive shaft of the valve body has a first force that acts due to a pressure difference between the first pressure chamber and the second pressure chamber separated from each other, To drive by both the force acting in the same direction as the first force and the second force acting due to the pressure difference between the third pressure chamber and the fourth pressure chamber separated from each other The response to the valve drive can be improved.
- the respective pressure chambers are not enlarged.
- the force that drives the valve can be increased. That is, in the case of a conventional fluid control valve that drives a valve only by the pressure difference between two pressure chambers, in order to increase the force to drive the valve, the inner diameter of one pressure chamber is increased, It is necessary to increase the pressure receiving area of the diaphragm by increasing the diameter of the diaphragm provided between the pressure chambers. However, in this case, the diameter of the pressure chamber increases, which causes an increase in the size of the fluid control valve. An increase in the size of the fluid control valve may increase the weight or deteriorate the mountability on the vehicle.
- the first pressure chamber, the second pressure chamber, the third pressure chamber, and the fourth pressure chamber are arranged in the axial direction of the drive shaft.
- the valve drive force can be increased without excessively increasing the inner diameter of each pressure chamber.
- one of the first pressure chamber, the second pressure chamber, the third pressure chamber, and the fourth pressure chamber is a flow path that is blocked or connected by a valve body.
- the valve body blocks the Unlike the case where a flow path to be disconnected or connected is provided, the fluid control valve can be more easily downsized.
- the valve In a normal state where the first pressure chamber, the second pressure chamber, the third pressure chamber, and the fourth pressure chamber are all at the same pressure, the valve is closed by the elasticity of the elasticity applying means.
- the configuration of the present invention is adopted.
- the valve open state can be effectively realized. For this reason, the effect of this invention obtained by employ
- the drive shaft is opened by a first force and a second force acting in the same direction.
- the fuel cell side of the flow path is positioned on the front side in the valve opening direction in which the drive shaft is driven so that the valve shaft is driven from the valve opening state to the valve closing state.
- the effect of the present invention obtained by adopting the configuration becomes remarkable. In other words, when oxygen or hydrogen is consumed as a result of power generation by the fuel cell, the fuel cell side of the fluid control valve becomes negative pressure, and in order to change from the closed state to the open state, the negative pressure is resisted.
- the opening area of the flow path can be adjusted, for example, it is used as having both functions of a pressure regulator for a fuel cell and an air valve for a fuel cell provided in a flow path for flowing an oxidizing gas gas. it can. For this reason, for example, if an air shunt valve that can adjust the opening area of the flow path is provided in the oxidizing gas system discharge flow path for discharging the oxidizing gas system gas from the fuel cell, the oxidizing gas system discharge flow path is provided. There is no need to provide a separate pressure regulating valve, and costs can be reduced. '
- the member constituting the first pressure chamber and the member constituting the second pressure chamber are mutually connected. Even if the fluid control valve is used in a situation where it may be splashed with water, such as when the fluid control valve is mounted under the vehicle floor, it is water resistant. It is easy to achieve a high level of compatibility between improved performance and weight reduction.
- FIG. 1 is a diagram showing a basic configuration of a fuel cell system according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing the structure of the inlet shut-off valve (or outlet shut-off valve) used in the fuel cell system of FIG. 1 in the opened state.
- FIG. 3 is a sectional view showing the structure of the inlet shut valve (or outlet shut valve) in the closed state.
- FIG. 4 is an enlarged view corresponding to part A of FIG. 3, showing an inlet shut-off valve (or outlet shut-off valve) that constitutes the fuel cell system according to the second embodiment of the present invention.
- FIG. 1 is a schematic configuration diagram of a fuel cell system of the present embodiment.
- the fuel cell system 1 0 includes a fuel cell stack 1 2, an oxidation gas supply flow path 1 4, an oxidizing gas system discharge flow path 1 6, a humidifier bypass valve 1 8, an inlet shut-off valve 2 0, and an outlet Shut valve 2 2 is provided.
- the fuel cell stack 1 2 generates electricity by an electrochemical reaction between oxygen and hydrogen. That is, by supplying hydrogen gas, which is a fuel gas, and air, which is an oxidizing gas, to the fuel cell stack 12, oxygen and hydrogen are supplied to a plurality of fuel cell cells (not shown) in the fuel cell stack 12. And an electrochemical reaction produces electric energy.
- the fuel battery cell includes, for example, a membrane-electrode assembly in which an electrolyte membrane is sandwiched between an anode side electrode and a force sword side electrode, and a separator on both sides thereof.
- the fuel cell system 10 of the present embodiment is mounted on a vehicle, for example, for a fuel cell vehicle, and the fuel cell stack 12 is used as a power source for a vehicle driving motor. T JP2007 / 072052 Of course, the fuel cell system of the present embodiment can also be used for purposes other than vehicle driving.
- an oxidizing gas supply channel 14 In order to supply air, which is an oxidizing gas, to the fuel cell stack 12, an oxidizing gas supply channel 14 is provided. An air compressor 24 and an intercooler 26 are provided on the gas upstream side of the oxidizing gas supply channel 14. The air pressurized by the air compressor 24 is cooled by the intercooler 26, humidified by the humidifier 28, and then supplied to the flow path on the power sword side electrode side of the fuel cell stack 12.
- the humidifier bypass path 3 and the main path 30 are parallel to the gas flow. 2 is provided.
- the air passing through the humidifier bypass path 3 2 is supplied to the fuel cell stack 12 without passing through the humidifier 28.
- a humidifier bypass valve 18 is provided in the middle of the humidifier bypass path 3 2.
- an oxidizing gas system discharge flow path 1 6 is provided in order to discharge air off-gas, which is air supplied to the fuel cell stack 1 2 and subjected to an electrochemical reaction in each fuel cell, from the fuel cell stack 1 2, an oxidizing gas system discharge flow path 1 6 is provided.
- the air off-gas discharged through the oxidizing gas system discharge flow path 16 is sent to the humidifier 28 via the pressure regulating valve 34, and then released to the atmosphere via a diluter (not shown).
- the pressure regulating valve 34 is controlled so that the pressure (back pressure) of the air discharged from the fuel cell stack 12 becomes an appropriate pressure value according to the operating state of the fuel cell stack 12.
- the pressure of the air corresponding to the position of the pressure sensor P 2 in the oxidizing gas system discharge flow path 16 is adjusted by the valve opening degree of the pressure regulating valve 34.
- the humidifier 28 serves to humidify the moisture obtained from the air discharged from the fuel cell stack 12 2 to the air before being supplied to the fuel cell stack 12.
- the fuel cell stack 12 is connected to a hydrogen gas supply channel for supplying hydrogen gas and a hydrogen gas system discharge channel for discharging hydrogen gas. Is omitted.
- the humidifier is connected between the upstream side connection part of the humidifier bypass path 3 2 and the humidifier 28 and in the oxidizing gas discharge path 16.
- a fuel cell bypass valve 38 is provided in the middle of the fuel cell bypass path 36. The fuel cell bypass valve 3 8 is used to control the pressure of the air supplied to the fuel cell stack 1 2. That is, the pressure of the air corresponding to the position of the inlet pressure sensor P 1 of the oxidation gas supply flow path 14 is adjusted by the opening degree of the fuel cell bypass valve 38.
- the air pressure corresponding to the position of the inlet pressure sensor P 1 can be adjusted by the flow rate of the air discharged from the air compressor 24.
- the air pressure corresponding to the position of the inlet pressure sensor P 1 can be adjusted by using both the opening degree of the fuel cell bypass valve 38 and the discharge flow rate of the air compressor 24.
- the fuel cell system 10 quickly raises the temperature of the fuel cell stack 12 at a low temperature start such as below freezing. For this reason, compared with the amount of hydrogen gas supplied to the fuel cell stack 1 2, the amount of air supplied to the fuel cell stack 1 2 is an amount commensurate with generating electricity by reaction with the hydrogen gas.
- the temperature of the fuel cell stack 12 can be increased rapidly by reducing the power sword stoichiometric ratio and generating power with low efficiency.
- hydrogen permeates the electrolyte membrane from the anode-side channel of the fuel cell stack 12 and enters the force-sword-side channel, and the hydrogen concentration in the oxidant gas discharge channel 16 is high.
- the fuel cell bypass valve 3 8 is opened in such a case, and is used to reduce the hydrogen concentration in the oxidant gas discharge passage 1 ′ 6 by air that does not pass through the fuel cell stack 12.
- the hydrogen gas contained in the hydrogen gas system gas discharged from the fuel cell stack 12, so-called hydrogen off-gas may be higher in concentration than usual, and the fuel cell bypass valve 3 8 described above is In such a case, the valve can be opened to increase the amount of air that is sent to the diluter without passing through the fuel cell stack 12 and to reduce the hydrogen concentration in the exhausted gas.
- the inlet gas passage is connected to the gas downstream side of the humidifier 28 of the main path 30 of the oxidizing gas supply flow path 14 and the gas upstream side of the humidifier 28 of the oxidizing gas system discharge flow path 16.
- a shut valve 20 and an outlet shut valve 22 are provided.
- the humidifier bypass valve 18, the inlet shirt valve 20, and the outlet shirt soot valve 2 2 of the present invention are 72052 A fluid control valve and corresponds to the fuel cell on-off valve described in the claims. That is, the humidifier bypass valve 18, the inlet short valve 20, and the outlet short valve 22 are fluid controls that adjust the flow of air inside the humidifier bypass path 32, the main path 30, and the oxidizing gas system discharge flow path 16, respectively. Acts as a valve. Three PSVs (Pressure Switching Valves), each of which is an electromagnetic valve, are connected to each of these valves 18, 20, and 22 through a pressure control flow path 40.
- the humidifier bypass valve 18 is connected with three PSVs of VbS, VbC, and VbO.
- the inlet shut valve 20 is connected to three PSVs, V i S, V i C, and V i O
- the outlet shut valve 22 is connected to three PSVs, VoS, Vo C, and VoO.
- These PSVs are connected to the upstream side of the main passage 30 of the oxidizing gas supply passage 14 via the pressure control passage 40, for example, between the air conditioner presser 24 and the humidifier 28.
- These PSVs are controlled by a control unit such as an ECU (Electronic Control Unit) (not shown).
- the driving of the humidifier bypass valve 18, the inlet shut valve 20, and the outlet shut valve 22 is controlled by the corresponding PSV according to the state of the fuel cell stack 12 and the like.
- the configuration and operation of the inlet shut valve 20 and the outlet shut valve 22 will be described mainly by using the inlet shut valve 20 as a representative.
- the configuration itself of the inlet shut valve 20 and the outlet shut valve 22 is the same.
- the configuration of the humidifier bypass valve 18 will be described later.
- the inlet shut-off valve 20 is a normally open shirt collar valve in which the valve body is opened in a normal state where all the pressure chambers provided therein are at the same pressure.
- the inlet short valve 20 is provided with two upper and lower spaces partitioned by a partition portion 44 inside a housing 42 formed by connecting a plurality of housing elements, and a main diaphragm 46 and a sub-diaphragm are respectively provided in the two spaces.
- the valve closing pressure chamber 50 is formed on the upper surface side of the main diaphragm 46
- the valve opening pressure chamber 52 is formed on the lower surface side
- the atmospheric pressure chamber 54 is disposed on the upper surface side of the sub diaphragm 48.
- a flow path configuration pressure chamber 56 is provided on the lower surface side. Of these, the flow path constituting pressure chamber 56 is the claim category.
- the valve opening pressure chamber 52 corresponds to the third or fourth pressure chamber described in the claims
- the valve closing pressure chamber 50 corresponds to the fourth or third pressure described in the claims.
- the valve closing pressure chamber 5 0, the valve opening pressure chamber 5 2, the atmospheric pressure chamber 5 4, and the flow path constituting pressure chamber 5 6 are separated from each other, and these pressure chambers 5 0, 5 2, 5 4, None of the two pressure chambers are connected to each other.
- the main diaphragm 46 and the sub diaphragm 48 are connected to the valve body 58. That is, a valve body 58 having a drive shaft 60 is provided inside the housing 42, and the valve body 58 is supported on the housing 42 so as to be displaceable in the axial direction of the drive shaft 60.
- the valve body 58 has a drive shaft 60 and a disc-shaped valve body main body 62 connected to the lower end portion of the drive shaft 60.
- a cylindrical member 64 having a bottomed cylindrical shape having a driving shaft side cylindrical surface portion 63 on the outer peripheral surface is coupled to the lower end of the intermediate portion of the driving shaft 60.
- a sub-diaphragm made of a coasting material such as an elastomer such as rubber, for example, ethylene propylene rubber such as EPDM, etc.
- the inner peripheral end of the sub-diaphragm 48 is coupled to the drive shaft 60.
- the outer peripheral end of the sub-diaphragm 48 is joined to the inner peripheral part of the housing 42 so as to be sandwiched between two housing elements constituting the housing 42.
- the atmospheric pressure chamber 54 and the flow path constituting pressure chamber 56 are shut off in an airtight manner. Further, a diaphragm side cylindrical portion 66 that is elastically deformed so as to be pressed along the drive shaft side cylindrical surface portion 63 is provided near the inner diameter of the sub diaphragm 48 in the radial direction. Then, from the closed state as shown in FIG. 3, the sub-diaphragm 48 is located between the drive shaft side cylindrical surface portion 63 of the cylindrical member 64 and the inner surface of the housing 42, and has an upward chevron shape. The lower surface of the annular deformed portion 67 deformed into an annular shape receives the pressure of the flow path constituting pressure chamber 56.
- the lower surface of the annular deformed portion 67 receives the pressure of the flow path constituting pressure chamber 56, so that the upper part of the diaphragm side cylindrical portion 66 is peeled off from the drive shaft side cylindrical surface portion 63 as shown in FIG.
- the drive shaft 60 is displaced while being elastically deformed.
- the second diaphragm side cylindrical portion 7 0 elastically deformed so as to be pressed along the housing side cylindrical surface portion 68 provided on the inner surface of the housing 42 near the outer diameter of the intermediate portion of the sub diaphragm 48. Is provided.
- the drive shaft 60 is displaced downward as shown in FIG. 3 from the open state as shown in FIG. 2, the upper part of the second diaphragm side cylindrical portion 70 is pulled from the housing side cylindrical surface portion 68. It is designed to be elastically deformed so as to peel off.
- the flow path constituting pressure chamber 5 6 constitutes a part of the oxidizing gas supply flow path 14 (see Fig. 1) (in the case of the outlet shut valve 2 2, the oxidizing gas system discharge flow path 1 6). As a result, the upstream side and the downstream side are blocked or connected.
- the atmospheric pressure chamber 54 is connected to an atmospheric communication pipe 72 having one end communicating with the atmosphere, and the atmospheric pressure chamber 54 is opened to the atmosphere.
- two substantially disc-shaped holding members 7 4 a and 7 4 b are joined to the upper end of the valve body 58, and between the two holding members 7 4 a and 7 4 b,
- the inner end of the main diaphragm 46 made of an elastic material such as an elastomer such as rubber, for example, ethylene propylene rubber such as EPDM, is sandwiched.
- the outer peripheral end portion of the main diaphragm 46 is coupled to the inner peripheral portion of the housing 4 2 so as to be sandwiched by two housing elements constituting the housing 42.
- the upper side and the lower side of the space above the partition portion 44 in the housing 42 are separated into the valve closing pressure chamber 50 and the valve opening pressure chamber 52 by the main diaphragm 46.
- the valve closing pressure chamber 50 and the valve opening pressure chamber 52 are shut off in an airtight manner.
- a supply / exhaust pipe 76 is connected to the valve closing pressure chamber 50 and the valve opening pressure chamber 52.
- a coil spring 7 8 as an elastic force applying means is provided between the lower holding member 7 4 a of the two holding members 7 4 a and 7 4 b and the partition portion 4 4, and the valve Elasticity is given to the body 58 in the upward direction, that is, the direction in which the valve is opened.
- the valve body 58 is displaced downward, the lower surface of the valve body main body 62 is seated on the valve seat 80 to block the flow path. That is, the inside of the flow path is blocked or connected by the axial displacement of the drive shaft 60.
- the diameter of the pressure receiving area of the upper part of the drive shaft 60 including the main diaphragm 46 is sufficiently larger than the diameter of the pressure receiving area of the lower part of the drive shaft 60 including the sub diaphragm 48. .
- the valve closing pressure chamber 50 is connected to the pressure control flow path 40 on the Vi C side, which is a PSV, via a supply / discharge pipe 76 (FIGS. 2 and 3).
- the inlet 82 and the outlet 84 are reversed with respect to the inlet shut valve 20.
- the valve body 58 is driven upward by the displacement of the drive shaft 60, the air off-gas flowing from the upstream side of the oxidizing gas system discharge flow path 16 toward the inlet 82 of the outlet short valve 22 is discharged to the outlet short valve 2 It is discharged from the outlet 84 of 2 to the humidifier 28 side.
- the valve body 58 is driven downward due to the displacement of the drive shaft 60, the inlet 82 is blocked, and the flow of air off-gas from the upstream side of the oxidizing gas discharge channel 16 toward the humidifier 28 is blocked.
- the axial displacement of the drive shaft 60 is controlled by three PSVs.
- the pressures in the valve opening pressure chamber 52 and the valve closing pressure chamber 50 are controlled by three PSVs V i S, V i C, and V iO.
- the pressures in the valve opening pressure chamber 52 and the valve closing pressure chamber 50 are controlled by three PSVs of Vo S, VoC, and VoO.
- V i S (or Vo S) shown in FIG. 1 is a three-way, that is, a three-way valve type PSV, and one of the pressure chambers 50 and 52 for closing the valve is used.
- the gas compressor 24 is connected to the gas upstream side, and the other pressure chamber is shut off from the air upstream side of the air conditioner presser 24.
- V i C, V i O, VoC, and VoO are all 2-way PSVs. It functions as a valve.
- V i S (or Vo S) changes the connection state of the flow path depending on the energized state.
- V i S (or Vo S) connects the gas discharge side of the air compressor 24 and the valve-opening pressure chamber 52 in a non-energized state (non-energized state).
- V i S (or VoS) connects the gas discharge side of the air compressor and the valve closing pressure chamber 50 in an energized state (energized state).
- V i C, V i O, VoC, and VoO all valves are closed when not energized, and valves are opened when energized.
- the drive shaft 60 is opened with the first force F 1 acting upward on the drive shaft 60 due to the pressure difference between the flow path constituting pressure chamber 56 and the atmospheric pressure chamber 54, and with the valve closing pressure chamber 50 opened.
- the inlet shut-off valve 20 opens as shown in Fig. 2. In this state, V i C (V o C) is closed and the valve closing pressure chamber 50 is shut off from the atmosphere. Further, in this state, of the two holding members 7 4 a and 7 4 b, the upper holding member 7 4 b serves as a stagger that hits the upper part of the inner surface of the housing 42.
- V i S (or V o S) is energized, and the air compressor 24 is used.
- the air whose pressure has increased is supplied to the valve closing pressure chamber 5 0 and the discharge pipe 7 6 and the flow path for pressure control
- V i 0 V o O
- the diameter of the pressure receiving area of the upper part of the drive shaft 60 including the main diaphragm 46 is larger than the diameter of the pressure receiving area of the lower part of the drive shaft 60 including the sub diaphragm 48. Is also big enough. For this reason, as shown in FIG. 3, the drive shaft 60 is displaced downward against the fourth force F 4 and the elasticity of the coil spring 78, and the valve body main body 62 is moved to the valve seat 80. Sit down.
- Vi S (or V o S) is de-energized and the connection between the valve closing pressure chamber 50 and the air compressor 24 is cut off and closed.
- the air pressure in the valve pressure chamber 50 is kept constant. And in this state
- V i O V o O
- the outlet shut valve 22 also opens and closes in the same way.
- the humidifier bypass valve 18 is a normally closed shunt valve in which the valve body 58 is closed in a normal state in which all the pressure chambers provided in the interior are at the same pressure.
- the detailed structure of the humidifier bypass valve 1 8 is not shown, it has the same structure as the inlet shut valve 20 or the outlet shut valve 22 shown in FIGS. 2 and 3, and the coil spring 7 8 (FIG. 2, FIG. 3) and the top surface of the bottom plate of the cylindrical member 6 4 07072052 Cut portion 44 has a structure provided between the lower surface.
- the humidifier bypass valve 18 has a coil between the upper surface of the member fixed to the upper end of the valve body 58 and the lower surface of the housing 42, such as a restraining member 74 b (see FIGS. 2 and 3).
- a spring can be provided to create a normally closed shut valve (see schematic diagram in Figure 1).
- the humidifier bypass valve 18 is provided with a valve closing pressure chamber 50 in the pressure pressure control flow path 40 on the side, and a pressure control flow on the Vb side of the PSV.
- a valve opening pressure chamber 52 is connected to the passage 40, respectively.
- the axial displacement of the drive shaft 60 is controlled by three PSVs, Vb S, Vb C, and VbO, as in the case of the inlet shut valve 20 and the outlet shut valve 22.
- Vb S three PSVs
- Vb C three PSVs
- VbO three PSVs
- the triangles filled with black indicate that the flow path is blocked, and the open triangles connect the flow paths.
- VbS connects the gas discharge side of the air conditioner presser 24 and the valve closing pressure chamber 50 in the non-energized state, and connects the gas discharge side of the air conditioner presser 24 and the valve opening pressure chamber 52 in the energized state.
- the humidifier bypass valve 18 is opened.
- the air compressor 24 The air whose pressure has been increased by 00 052 is introduced into the valve closing pressure chamber 50 and the valve opening pressure chamber 52 is opened to the atmosphere.
- the drive shaft 60 is moved downward by the force acting downward on the drive shaft 60 due to the pressure difference between the valve opening pressure chamber 52 and the valve closing pressure chamber 50, and the elasticity of the coil spring.
- a force is applied to the drive shaft 60 due to the pressure difference between the flow path constituting pressure chamber 56 and the atmospheric pressure chamber 54, but the drive including the main diaphragm 46 (see FIGS. 2 and 3).
- the diameter of the pressure receiving area of the upper part of the shaft 60 is sufficiently larger than the diameter of the pressure receiving area of the lower part of the drive shaft 60 including the sub-diaphragm 48 (see FIGS. 2 and 3).
- the drive shaft 60 is displaced downward. Then, the humidifier bypass valve 18 closes.
- the operation is stopped, that is, all three PSVs corresponding to the inlet shut valve 20, the outlet shut valve 22, and the humidifier bypass valve 18 respectively.
- the inlet shirt valve 20, the outlet shirt valve 22, and the humidifier bypass valve 18 can both be kept closed. For this reason, it is possible to prevent new air from being supplied to the internal flow path on the power sword side electrode side of the fuel cell stack 12. For this reason, it can be suppressed that the carbon material holding the catalyst constituting the membrane-one electrode assembly is oxidized and the life of the fuel cell stack 12 is reduced.
- the inlet shut valve 20, the outlet shut valve 22, and the humidifier bypass valve 18 include a valve body 58 having a drive shaft 60, and the axial direction of the drive shaft 60 And the drive shaft 60 is driven by a pressure difference between the valve closing pressure chamber 50 and the valve opening pressure chamber 52 which are separated from each other.
- Forces F 1, F 1 ′ and forces acting in the same direction as the first forces F 1, F 1 ′, in the atmospheric pressure chamber 5 4 and the flow path constituting pressure chamber 5 6 separated from each other It has a configuration in which it is driven by both forces F 2 and F 2 ′ acting by the pressure difference. For this reason, the responsiveness to the drive of the valve can be improved.
- valve closing pressure chamber 50, the valve opening pressure chamber 52, the atmospheric pressure chamber 54, and the flow path constituting pressure chamber 56 are arranged in the axial direction of the drive shaft 60, the respective pressures The force for driving the valve can be increased without excessively increasing the inner diameter of the chambers 50, 52, 54, 56. 2
- the flow path constituting pressure chamber 5 6 is a flow path that is blocked or connected by the valve body 5 8, the valve body 5 8 in addition to the pressure chambers 5 0, 5 2, 5 4, 5 6 Unlike the case where a flow path that is blocked or connected is provided, the inlet short valve 20, the outlet short valve 2 2, and the humidifier bypass valve 18 can be more easily downsized.
- the humidifier bypass valve 18 is a normally closed type seal that is closed by a coil spring when all the pressure chambers 50, 52, 54, 56 are at the same pressure.
- the drive shaft 60 is driven in the direction of opening the valve by the first force F 1 ′ and the second force F 2 ′ acting in the same direction. For this reason, “a valve body 58 having a drive shaft 60 is provided, the inside of the flow path is blocked or connected by the axial displacement of the drive shaft 60, and the drive shaft 60 is separated from each other.
- the valve opening state can be effectively realized by 1 'and the second force F 2'. For this reason, the effect acquired by employ
- the inlet shirt valve 20, the outlet shirt valve 22, and the humidifier bypass valve 18 are a drive shaft side cylindrical surface portion 63 provided on the outer peripheral surface of a cylindrical member 64 fixed to the drive shaft 60, and A housing 42, and an elastic material sub-diaphragm 48 having an inner peripheral portion coupled to the drive shaft 60 and an outer peripheral portion coupled to the housing 42.
- the annular deformed portion 67 of the sub diaphragm 48 receives pressure, the drive shaft 60 is displaced while the sub diaphragm 48 is elastically deformed. For this reason, when the drive shaft 60 is displaced, the displacement of the drive shaft 60 can be moderated by the deformation resistance of the sub-diaphragm 48.
- the sub-diaphragm 48 that receives pressure can have a function of gradual displacement of the drive shaft 60.
- the inlet shunt valve 20, the outlet shut valve 22, and the humidifier bypass valve 18 are used as fuel cell on-off valves provided in the oxidizing gas supply channel 14 or the oxidizing gas system discharge channel 16, The first force F 1, F 1 ′ acting in the same direction and the second force F 2, F 2 ′ are driven in the direction in which the drive shaft 60 is opened, and the drive shaft 60 is opened.
- the flow path that is, the fuel cell stack 12 side of the flow path constituting pressure chamber 56 is located on the front side in the valve opening direction that drives the valve state to be closed, that is, the lower side of FIGS. I am doing so.
- the valve body 58 having the drive shaft 60 is provided, the inside of the flow path is shut off or connected by the axial displacement of the drive shaft 60, and the drive shaft 60 is separated from the valve-closing pressure.
- the effect obtained by adopting the composition becomes remarkable. That is, when oxygen and hydrogen are consumed by the power generation of the fuel cell stack 12, the fuel cell stack 12 side of each valve 20, 22, 18 becomes negative pressure. For this reason, in order to change from the closed state to the open state, it is necessary to displace the drive shaft 60 with a negative pressure.
- a cylindrical seal member 8 6 that can be expanded and contracted in the axial direction is provided between the outer peripheral surface of the intermediate portion of the drive shaft 60 and the lower surface of the partition portion 4 4. It is also possible to more effectively prevent moisture from adhering to a sliding portion such as a bearing portion between 0 and the housing 42. As a result, it is possible to more effectively prevent the adhering water from freezing in a low temperature environment and preventing the drive shaft 60 from sliding smoothly.
- at least one of the inlet shut valve 20, the outlet shut valve 22, and the humidifier bypass valve 18 is simply shut off or blocked in the flow path.
- any valve 2 0, 2 2 and 1 8 valve closing pressure chamber 5 0, valve opening pressure chamber 5 2 and atmospheric pressure chamber 5 4 and flow path pressure chamber 5 6 By adopting a configuration that enables this, the opening area of the flow path can be adjusted by maintaining the drive shaft 60 in a half-open state between the fully opened and closed states.
- the outlet shut valve 22 is provided as an air shut valve having a pressure regulating valve function in the oxidizing gas discharge channel 16, the oxidizing gas discharge channel 16 may be provided in the oxidizing gas discharge channel 16. It is not necessary to provide another pressure regulating valve 3 4 (Fig. 1), and the cost can be reduced.
- the fluid control valve of the present invention is not limited to the case where it is applied to the inlet shut valve 20, the outlet short valve 22, and the humidifier bypass valve 18 as described above.
- fuel gas The present invention can also be applied to a fuel cell on-off valve provided in a fuel gas supply channel or a fuel gas system discharge channel for flowing hydrogen gas, which is a system gas.
- the valve opening pressure chamber 52 and the valve closing pressure chamber In a configuration in which a valve body 58 having a drive shaft 60 is driven by a solenoid motor without providing 50, a sub-diaphragm 48 (see FIGS.
- Atmospheric pressure chamber with corresponding diaphragm It is also possible to partition 5 4 from the flow path constituting pressure chamber 5 6. That is, it is a fluid control valve that includes a valve body 58 having a drive shaft 60, and shuts off or connects the inside of the flow path by the axial displacement of the drive shaft 60.
- the drive shaft 60 is a solenoid or A first force by Moyu and a force acting in the same direction as the first force, and a second force acting due to a pressure difference between the first pressure chamber and the second pressure chamber separated from each other It is also possible to provide a fluid control valve characterized by being driven by both forces.
- FIG. 4 is an enlarged view corresponding to a portion A in FIG. 3, showing an inlet shut-off valve (or outlet shut-off valve) constituting the fuel cell system according to the second embodiment of the present invention.
- the inlet short valve 20 (or the outlet short valve 2 2.
- ⁇ inlet shut valve 20) is driven as in the first embodiment.
- a sub-diaphragm 48 is connected to the shaft 60 (see FIGS. 2 and 3). Also, The outer peripheral end portion of the sub-diaphragm 48 is sandwiched between the first housing element 8 8 constituting the housing 42 and the second housing element 90. Further, a flow path constituting pressure chamber 56 is provided inside the first eighteenth element 88, and an atmospheric pressure chamber 54 is provided inside the second housing element 90, respectively.
- a port (not shown) inserted into a through hole (not shown) provided in one of the first housing element 88 and the second housing element 90 is connected to the first housing element 88 and the second housing element.
- the first housing element 88 and the second housing element 90 are coupled to each other by a fastening portion configured by coupling to a screw hole (not shown) provided on the other side of the 90.
- an outer bead portion 92 which is a substantially annular protrusion, is provided on the outer peripheral portion of one side of the first housing element 88 (upper side in FIG. 4), and one side of the second housing element 90 (see FIG.
- a substantially annular outer part i step part 9 4 is provided on the outer peripheral part, and the end face of the outer bead part 9 2 is abutted against the side face of the outer step part 9 4 (lower side face of Fig. 4). ing.
- the joint portion 96 is configured by the portion where the outer step portion 94 and the outer bead portion 92 are in contact with each other.
- the outer step portion on one side surface (lower side surface of Fig. 4) of the second housing element 90
- the labyrinth seal portion 100 is configured by causing the front end surface of the first housing element 8 and the one surface of the first housing element 88 to face each other with a gap therebetween. That is, the labyrinth seal portion 100 is provided on the radially inner side of the housing 42 with respect to the coupling portion 96. For this reason, even if water enters the inside from the outside through the coupling portion 96, the labyrinth seal portion 100 will cause water to enter the flow chamber constituting pressure chamber 56 and the atmospheric pressure chamber 54. Can be effectively prevented.
- the outer peripheral end portion of the sub-diaphragm 48 is interposed between the inner pea portion 98 and the outer pier portion 92 with respect to the radial direction of the housing 42 through the gap constituting the labyrinth seal portion 100. And the outer peripheral end of the sub-diaphragm 48 is sandwiched between the first housing element 88 and the second housing element 90.
- first housing element 88 that constitutes the flow path constituting pressure chamber 56 and the second housing element 90 that constitutes the atmospheric pressure chamber 54 are made of different metals.
- the first housing element 88 is made of stainless steel
- the second housing element 90 is made of an aluminum material or an aluminum alloy. Further, the whole of the second housing element 90 including the portion constituting the coupling portion 96 is subjected to anodizing. As a result, the durability of the second housing element 90 against salt corrosion can be improved.
- the housing element that sandwiches the outer peripheral end of the main diaphragm 46 can also be made of aluminum material or aluminum alloy.
- the connecting portion 96 between the first housing element 88 and the second housing element 90 that is, the width W1 in the radial direction of the contact portion is sufficiently small.
- a portion of the coupling portion 96 that is not shown in FIG. 4 includes a fastening portion that is configured by, for example, coupling a bolt to a screw hole.
- the width W 1 of the first portion of the first housing element 8 8 is reduced to a thickness T 1 or less in the radial direction of the main body portion 10 2 that receives the pressure in the flow path constituting pressure chamber 56.
- a portion of the coupling portion 96 that is displaced in the circumferential direction from the fastening portion is defined as a linear contact portion.
- the first housing element 88 constituting the flow path constituting pressure chamber 56 and the second housing element 90 constituting the atmospheric pressure chamber 54 are made of different metals. Therefore, even when the inlet shut valve 20 is used in a situation where water may splash outside, such as when the inlet shirt valve 20 is mounted under the floor of the vehicle, it is water resistant. It becomes easier to achieve both improvement and weight reduction at a high level. That is, since the second housing element 90 can be made of a lightweight metal such as an aluminum material or an aluminum alloy, the inlet short valve 20 can be reduced in weight. In addition, when the second housing element 90 is made of a light metal such as an aluminum material or an aluminum alloy, when the second housing element 90 is anodized to improve durability against salt damage corrosion.
- the first housing element 88 is made of aluminum or aluminum alloy that has been subjected to an aluminum treatment, cracks are likely to overlap each other at the joint 96, so that water enters the inside of the housing 42. There is room for improvement.
- the material constituting the first housing element 8 8 is made of stainless steel, which is a metal different from aluminum or aluminum alloy, which is the metal constituting the second housing element 90, the joint 96 It is possible to effectively prevent the cracks from overlapping, and to easily suppress the intrusion of water through the coupling part 96.
- the labyrinth seal portion 10 0 0 is located on the radially inner side of the housing 4 2 with respect to the coupling portion 96 formed by abutting the outer bead portion 92 and the outer step portion 94. Is provided. For this reason, in the inlet shut-off valve 20, it is possible to improve the durability against salt corrosion while suppressing the local progress of electrolytic corrosion due to the contact of different metals.
- the progress of electrolytic corrosion occurs according to the ratio of the surface areas of the respective metals. It becomes easy.
- the second housing element 90 is made of aluminum or an aluminum alloy and anodized, the surface of the second housing element 90 is likely to crack as described above. There is a possibility that water can easily enter the inside of the housing 42 from the outside through the coupling portion 96 between the first housing element 88 and the second housing element 90. For this reason, in the past, it has been considered that an alumite treatment is not performed on a portion including a contact portion in contact with a member formed of a stainless steel alloy in a member formed of aluminum or an aluminum alloy. However, in this case, the durability of the member made of aluminum or aluminum alloy, that is, the second housing element 90 against salt corrosion may be reduced.
- the conflicting requirements can be met at the same time. That is, since the labyrinth seal portion 100 is provided on the radially inner side of the housing 42 rather than the coupling portion 96 formed by abutting the outer bead portion 92 and the outer step portion 94, By reducing the radial width W 1 of the coupling part 96, the surface pressure of the coupling part 96 can be increased, the sealing performance of the coupling part 96 can be increased, and the labyrinth seal part 100 can be obtained. Combined with the high sealing performance that can be achieved, the overall sealing performance can be made sufficiently high. As a result, a structure that can simultaneously satisfy the requirements (A) and (B) can be obtained.
- the housing element that holds the outer peripheral edge of the main diaphragm 46 is made of a metal different from the second housing element 90, such as stainless steel.
- a metal different from the second housing element 90 such as stainless steel.
- the present invention is used for a fluid control valve and a fuel cell system.
- it is used in a fuel cell system that is mounted on a vehicle for use as a fuel cell vehicle and uses a fuel cell stack as a power source for a vehicle running vehicle.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
- Fluid-Driven Valves (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008548210A JP5024295B2 (ja) | 2006-12-07 | 2007-11-07 | 燃料電池システム |
CN2007800453137A CN101553678B (zh) | 2006-12-07 | 2007-11-07 | 流体控制阀及燃料电池*** |
DE112007002889.0T DE112007002889B4 (de) | 2006-12-07 | 2007-11-07 | Fluidsteuerungsventil und Brennstoffzellensystem |
US12/513,587 US8439328B2 (en) | 2006-12-07 | 2007-11-07 | Fluid control valve and fuel cell system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006330184 | 2006-12-07 | ||
JP2006-330184 | 2006-12-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008069007A1 true WO2008069007A1 (ja) | 2008-06-12 |
Family
ID=39491912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/072052 WO2008069007A1 (ja) | 2006-12-07 | 2007-11-07 | 流体制御弁および燃料電池システム |
Country Status (5)
Country | Link |
---|---|
US (1) | US8439328B2 (ja) |
JP (1) | JP5024295B2 (ja) |
CN (1) | CN101553678B (ja) |
DE (1) | DE112007002889B4 (ja) |
WO (1) | WO2008069007A1 (ja) |
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CN101931088A (zh) * | 2009-06-19 | 2010-12-29 | 现代自动车株式会社 | 用于燃料电池组的集成阀*** |
CN114479955A (zh) * | 2022-02-21 | 2022-05-13 | 陕煤集团榆林化学有限责任公司 | 一种气化炉环隙吹扫气流量控制*** |
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JP5040411B2 (ja) * | 2007-04-18 | 2012-10-03 | トヨタ自動車株式会社 | 燃料電池システム |
FR2977650B1 (fr) * | 2011-07-05 | 2014-03-14 | Valeo Sys Controle Moteur Sas | Vanne, notamment de regulation de debit de gaz, et procede d'elimination de condensats dans une vanne |
US9077004B2 (en) * | 2012-04-18 | 2015-07-07 | GM Global Technology Operations LLC | Extended valve orifice for fuel cell |
US9312550B2 (en) * | 2013-03-15 | 2016-04-12 | Intelligent Energy Limited | Fluidic components suitable for fuel cell systems including pressure regulators and valves |
DE102014103779B4 (de) * | 2014-03-19 | 2018-06-14 | Vibracoustic Gmbh | Elektromagnetisch schaltbares Ventil sowie eine Luftfeder mit einem derartigen Ventil |
MX2017000930A (es) * | 2014-07-22 | 2017-11-02 | Fisher Jeon Gas Equipment (Chengdu) Co Ltd | Elemento de válvula de compensación y válvula de regulación de la presión. |
USD845803S1 (en) * | 2015-10-20 | 2019-04-16 | Surpass Industry Co., Ltd. | Fluid apparatus for semiconductor manufacturing equipment |
DE102015120011A1 (de) * | 2015-11-18 | 2017-05-18 | Technische Universität Darmstadt | Aktor mit einem linear verlagerbaren Stellglied |
JP6415418B2 (ja) * | 2015-11-27 | 2018-10-31 | 株式会社アドヴィックス | 流体制御弁装置 |
CN106090293B (zh) * | 2016-06-08 | 2018-09-18 | 北京控制工程研究所 | 一种膜片式自锁阀双向承压结构 |
DE202017104079U1 (de) * | 2017-07-07 | 2017-08-21 | Samson Ag | Stellantrieb für Prozessventile |
DE102018201253A1 (de) * | 2018-01-29 | 2019-08-01 | Audi Ag | Verfahren für den Froststart eines Brennstoffzellensystems und Brennstoffzellensystem zur Anwendung des Verfahrens |
CN111226067B (zh) * | 2018-09-27 | 2022-11-01 | Mt.H控制阀株式会社 | 控制阀装置 |
BR102019014170A2 (pt) * | 2019-07-09 | 2021-01-19 | Kléryston Lasiê Segat | sistema de ajuste e controle remoto com regulador de pressão para sistemas de irrigação |
DE102022128711A1 (de) | 2022-10-28 | 2024-05-08 | MTU Aero Engines AG | Flugzeug-Brennstoffzellen-Antrieb |
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Also Published As
Publication number | Publication date |
---|---|
JPWO2008069007A1 (ja) | 2010-03-18 |
CN101553678B (zh) | 2013-09-18 |
US8439328B2 (en) | 2013-05-14 |
US20100035117A1 (en) | 2010-02-11 |
DE112007002889T5 (de) | 2009-10-29 |
CN101553678A (zh) | 2009-10-07 |
JP5024295B2 (ja) | 2012-09-12 |
DE112007002889B4 (de) | 2015-05-13 |
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