WO2012023396A1 - Clapet anti-retour avant et système de pile à combustible - Google Patents

Clapet anti-retour avant et système de pile à combustible Download PDF

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Publication number
WO2012023396A1
WO2012023396A1 PCT/JP2011/067126 JP2011067126W WO2012023396A1 WO 2012023396 A1 WO2012023396 A1 WO 2012023396A1 JP 2011067126 W JP2011067126 W JP 2011067126W WO 2012023396 A1 WO2012023396 A1 WO 2012023396A1
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WIPO (PCT)
Prior art keywords
valve
protrusion
diaphragm
stop valve
fluid
Prior art date
Application number
PCT/JP2011/067126
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English (en)
Japanese (ja)
Inventor
東山祐三
Original Assignee
株式会社村田製作所
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Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2012529542A priority Critical patent/JP5510551B2/ja
Publication of WO2012023396A1 publication Critical patent/WO2012023396A1/fr

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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
    • F16K31/1266—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 acted upon by the circulating fluid
    • 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
    • H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
    • 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
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1009—Fuel cells with solid electrolytes with one of the reactants being liquid, solid or liquid-charged
    • H01M8/1011—Direct alcohol fuel cells [DAFC], e.g. direct methanol fuel cells [DMFC]
    • 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 stop valve for controlling the forward flow of a fluid, and a fuel cell system including the stop valve.
  • Patent Document 1 discloses a passively driven pressure reducing valve used for a small fuel cell.
  • the pressure reducing valve is configured to automatically open and close using a pressure difference when the fluid pressure reaches a set pressure.
  • FIG. 1A and 1B are sectional views of a pressure reducing valve disclosed in Patent Document 1.
  • FIG. The pressure reducing valve includes a diaphragm 1 serving as a movable portion, a piston 2 serving as a transmission mechanism, a valve housing 7, a valve seat portion 3 forming a valve portion, a valve body portion 4, and a support portion 5.
  • the valve body portion 4 is supported around the support portion 5.
  • the support part 5 is formed of an elastic beam.
  • the valve housing 7 constitutes a valve chamber 8 together with the diaphragm 1.
  • the upper pressure of the diaphragm (movable part) 1 is P0, the primary pressure upstream of the valve is P1, the pressure downstream of the valve is P2, the area of the valve body part 4 is S1, and the area of the diaphragm (movable part) 1 is S2. .
  • the condition for opening the valve as shown in FIG. 1B is (P1-P2) S1 ⁇ (P0-P2) S2. If P2 is higher than the pressure in this condition, the valve is closed, and if P2 is lower, the valve is opened. Thereby, P2 can be kept constant.
  • a direct methanol fuel cell has a pump for transporting fuel (methanol).
  • a valve-type pump has a check function by a valve, but does not have a stop function (a function to stop a forward flow).
  • a stop function a function to stop a forward flow.
  • the fuel cartridge incorporated in the fuel cell system may become hot depending on the external environment, and high pressure fluid may be discharged. As a result, excessive fluid may be supplied to the fuel cell or the pump may be destroyed in some cases. Therefore, there is a need for a valve that stops forward flow (hereinafter referred to as a stop valve) when a high-pressure fluid is added.
  • a stop valve a valve that stops forward flow
  • the diaphragm 1 is moved by the suction pressure of the fluid by the pump, and the valve body portion 4 is pushed down by the interlocking piston 2 so that the valve open. This opens the fluid flow path.
  • the diaphragm 1 may not return to its original position due to the adhesion between the diaphragm 1 and the bottom surface 9 of the valve chamber 8, and the valve may not close. .
  • an object of the present invention is to provide a stop valve that can prevent the diaphragm and the bottom surface of the valve chamber from sticking to each other even in a low-profile structure, and a fuel cell system including the stop valve.
  • the stop valve of the present invention has the following configuration in order to solve the above problems.
  • valve housing Comprising a valve chamber together with the valve housing, and a diaphragm displaced by the pressure of fluid in the valve chamber;
  • the valve housing has an inflow hole through which fluid flows into the valve chamber, and an outflow hole through which fluid flows out of the valve chamber due to the suction pressure of the fluid by the pump.
  • a stop valve A valve body disposed in the inflow hole and configured to block or open the inflow of fluid from the inflow hole to the valve chamber by displacement of the diaphragm;
  • the valve housing has a first protrusion with which the diaphragm comes into contact when the valve body releases the inflow of fluid from the inflow hole to the valve chamber, and the fluid is supplied to the first protrusion.
  • a first flow path that passes from the inside to the outside of the part is formed around the inflow hole on the bottom surface of the valve chamber facing the diaphragm.
  • the diaphragm comes into contact with the first protruding portion instead of the bottom surface of the valve chamber when the valve is opened. Furthermore, when the diaphragm comes into contact with the first protrusion, the fluid passes from the inside of the first protrusion to the outside of the first protrusion via the first flow path. Therefore, even when a highly active fluid is used for the stop valve of this configuration, since the diaphragm does not contact the bottom surface of the valve chamber, it is possible to prevent the diaphragm swollen by the fluid and the bottom surface of the valve chamber from sticking. Therefore, according to this configuration, it is possible to prevent the diaphragm and the bottom surface of the valve chamber from sticking even with a low-profile structure. Therefore, the reliability of fluid control can be improved.
  • a pressure receiving plate that receives a differential pressure between an atmospheric pressure and an internal pressure of the valve chamber is joined to the diaphragm,
  • the first protrusion is Dc, where Dv is the inner diameter of the valve chamber, Db is the diameter of the pressure receiving plate, and Dc is the outer diameter of the first protrusion located at both ends of the inflow hole. It is preferably formed in a shape satisfying the relationship of ⁇ (Dv + Db) / 4.
  • the pressure receiving plate is bent convexly to the opposite side with respect to the bottom surface of the valve chamber, and the diaphragm is in contact with the first protrusion at an angle. That is, since the diaphragm and the first protrusion are in line contact, the diaphragm and the first protrusion are difficult to adhere.
  • the diaphragm and the first protrusion are fixed, when the pressure receiving plate tries to return to the original flat state from the bent state, a force to peel off the fixation works from the outside of the first protrusion. Therefore, the diaphragm is easily peeled off from the first protrusion. Therefore, according to this structure, it can also prevent that a diaphragm and a 1st protrusion part adhere. Therefore, the reliability of fluid control can be further improved.
  • the first protrusion is formed in a curved surface shape having a convex tip.
  • the first projecting portion having this configuration has a smaller contact area with the diaphragm when the valve is opened than the first projecting portion having a flat tip. Therefore, it is difficult for the diaphragm and the first projecting portion to adhere to each other. Further, even if the diaphragm and the first protrusion are fixed, the diaphragm is easily peeled off from the first protrusion. Therefore, according to this structure, it can also prevent that a diaphragm and a 1st protrusion part adhere. Therefore, the reliability of fluid control can be further improved.
  • the first protrusion is an aggregate of a plurality of protrusions.
  • the first projecting portion having this configuration has a smaller contact area with the diaphragm when the valve is opened than the first projecting portion having an integral structure. Therefore, it is difficult for the diaphragm and the first projecting portion to adhere to each other. Further, even if the diaphragm and the first protrusion are fixed, the diaphragm is easily peeled off from the first protrusion. Therefore, according to this structure, it can also prevent that a diaphragm and a 1st protrusion part adhere. Therefore, the reliability of fluid control can be further improved.
  • the valve housing includes a second protrusion having a height lower than that of the first protrusion, and a second flow path for allowing fluid to pass from the inside to the outside of the second protrusion.
  • a second protrusion having a height lower than that of the first protrusion, and a second flow path for allowing fluid to pass from the inside to the outside of the second protrusion.
  • it is formed inside the first protrusion on the bottom surface of the valve chamber and around the inflow hole.
  • a third protrusion is formed on the periphery of the inflow hole on the bottom surface of the valve chamber, It is preferable that the first protrusion is formed on an upper surface of the third protrusion that faces the diaphragm.
  • the thickness of the peripheral portion of the inflow hole in the valve housing is increased by providing the third protrusion. Therefore, the rigidity of the peripheral part of the inflow hole in the valve housing can be increased. Therefore, according to this configuration, the rigidity of the peripheral portion of the inflow hole in the valve housing can be increased.
  • the fluid is preferably methanol.
  • Methanol is a fluid with higher activity than other fluids. Therefore, the configuration (1) is suitable for this configuration using methanol as a fluid.
  • the material of the diaphragm is rubber, and the material of the portion of the valve housing that contacts the fluid is resin.
  • the fuel cell system of the present invention has the following configuration in order to solve the above problems.
  • FIG. 5A is a top view of the cap part 110 provided in the stop valve 101 of FIG.
  • FIG. 5B is a bottom view of the valve housing 130 provided in the stop valve 101 of FIG.
  • FIG. 6 is a cross-sectional view taken along the line SS in FIG.
  • FIG. 1 It is a schematic cross section at the time of valve opening of the stop valve 101 which concerns on the 1st Embodiment of this invention. It is a perspective view of the valve housing
  • FIG. 12 is a cross-sectional view of main parts taken along line SS in FIG. 11. It is principal part sectional drawing of the valve housing
  • FIG. 15 is a main part cross-sectional view taken along line TT in FIG. 14.
  • FIG. 2A is a schematic cross-sectional view of the stop valve 90 in a state where the valve is closed
  • FIG. 2B is a schematic cross-sectional view of the stop valve 90 in a state where the valve is open.
  • the stop valve 90 includes a diaphragm 20 serving as a movable portion, a valve housing 30 that forms a valve chamber 40 together with the diaphragm 20, a cap portion 10 joined to the valve housing 30, and a valve portion 50 having a valve body portion 51. Consists of.
  • the valve housing 30 is formed with an inflow hole 43 through which the fluid flows into the valve chamber 40 and an outflow hole 49 through which the fluid flows out of the valve chamber 40 due to the suction pressure of the fluid by the pump.
  • the diaphragm 20 has a pusher 23 that is a transmission mechanism, and is displaced by the pressure of the fluid in the valve chamber 40.
  • the pusher 23 presses the valve body unit 51.
  • the valve portion 50 has a ring-shaped valve protrusion 55 formed on the inflow hole 43 side of the valve body portion 51, and the valve protrusion 55 is disposed so as to abut on a valve seat 48 positioned at the periphery of the inflow hole 43.
  • the valve body 51 abuts or separates from the valve seat 48 due to the displacement of the diaphragm 20 to block or open the inflow of fluid from the inflow hole 43 to the valve chamber 40.
  • the cap part 10 is formed with a hole part 15 communicating with the outside air on the upper surface. As a result, atmospheric pressure is applied to the upper part of the diaphragm 20.
  • the stop valve 90 is configured such that when the fluid pressure reaches a set pressure, the valve unit 50 automatically opens and closes using the pressure difference. More specifically, the pressure of the atmosphere above the diaphragm 20 is P0, the primary pressure upstream of the valve is P1, and the pressure downstream of the valve is P2, and the area of the valve body 51 (here, the valve body 51 includes a ring-shaped valve). S1 is the area determined by the diameter of the region surrounded by the valve protrusion 55 because the protrusion 55 is formed, S2 is the area of the diaphragm 20, and Fs is the force that the valve body 51 is biased upward. At this time, from the balance of pressure, the condition for opening the valve unit 50 as shown in FIG.
  • FIG. 3 is a system configuration diagram of the fuel cell system 100 including the stop valve 101 according to the first embodiment of the present invention.
  • the fuel cell system 100 includes a fuel cartridge 102 that stores methanol as a fuel, a stop valve 101, a pump 103 that transports methanol, and a power generation cell 104 that receives the supply of methanol from the pump 103 and generates power. .
  • a direct methanol fuel cell includes a pump 103 that transports methanol as a fuel.
  • the valve-type pump 103 has a check function by a valve, but does not have a stop function.
  • the pump 103 without the stop function is used, when the upstream pressure (forward pressure) is applied to the methanol, the methanol flows even when the pump 103 is not operated. Therefore, it is preferable to provide a stop valve 101 that is used in combination with the pump 103 and opens and closes the valve using the pump pressure.
  • the stop valve 101 includes a valve housing 130 that constitutes a valve chamber 140 together with the diaphragm 120.
  • the valve housing 130 is formed with an inflow hole 143 to which the fuel cartridge 102 is connected via the inflow path 163 and an outflow hole 149 to which the pump 103 is connected via the outflow path 165.
  • the stop valve 101 is mounted on the surface of a system housing 160 made of polyphenylene sulfide (PPS) resin, in which an inflow path 163 and an outflow path 165 are formed, via O-rings 161 and 162 that prevent leakage.
  • PPS polyphenylene sulfide
  • methanol flows from the fuel cartridge 102 into the valve chamber 140 through the inflow path 163 and the inflow hole 143. Then, methanol flows out from the valve chamber 140 to the pump 103 through the outflow passage 165 and the outflow hole 149 by the suction pressure of methanol by the pump 103. Then, methanol is supplied to the power generation cell 104 by the pump 103.
  • FIG. 4 is an exploded perspective view of the stop valve 101 according to the first embodiment.
  • FIG. 5A is a top view of the cap part 110 provided in the stop valve 101 of FIG.
  • FIG. 5B is a bottom view of the valve housing 130 provided in the stop valve 101 of FIG.
  • FIG. 6 is a cross-sectional view taken along the line SS in FIG.
  • FIG. 7 is a schematic cross-sectional view of the stop valve 101 according to the first embodiment of the present invention when the valve is opened.
  • the stop valve 101 includes a cap part 110, a diaphragm 120 serving as a movable part, a valve housing 130, and a valve part 150, as shown in an exploded perspective view in FIG. 4.
  • the valve housing 130 has a substantially square plate shape.
  • the valve housing 130 is formed with an inflow hole 143 through which the fluid flows into the valve chamber 140 and an outflow hole 149 through which the fluid flows out from the valve chamber 140 due to the suction pressure of the fluid by the pump 103.
  • the valve casing 130 has a cap section 110 and a screw fixing hole 131 for fixing the valve casing 130 to the system casing 160 and a mounting section 134 on which the peripheral edge 121 of the diaphragm 120 is mounted. And are formed.
  • the diaphragm 120 contacts the valve housing 130 when the valve unit 150 releases the inflow of methanol from the inflow hole 143 to the valve chamber 140.
  • the first protrusion 144 and the first flow path 145 that allows methanol to pass from the inside to the outside of the first protrusion 144 are around the inflow hole 143 on the bottom surface 141 of the valve chamber 140 facing the diaphragm 120. Is formed.
  • the first protruding portion 144 has an inner diameter of the valve chamber 140 as Dv, a diameter of a pressure receiving plate 125, which will be described in detail later, as Db, and an outer diameter of the first protruding portion 144 positioned at both ends of the inflow hole 143. Is a shape satisfying the relationship of Dc ⁇ (Dv + Db) / 4.
  • valve housing 130 is fitted with the valve portion 150 from the mounting surface side of the valve housing 130 to accommodate the valve portion 150, and A valve seat 148 positioned at the periphery of the inflow hole 143 is formed.
  • the materials 134, 141, 144, 145, and 148 that contact the methanol of the valve housing 130 are made of a resin having high methanol resistance, such as PPS (Polyphenylene sulfide) resin.
  • the material of the edge 132 that does not contact the methanol of the housing 130 is made of metal.
  • the valve housing 130 is formed by an insert mold in which an edge 132 of a metal part is inserted into a mold and is injection-molded.
  • the diaphragm 120 has a pusher 123 as a transmission mechanism at the center, and the peripheral portion 121 is formed in a disk shape that is thicker than the central portion 122.
  • the material of the diaphragm 120 is a rubber having high methanol resistance, such as ethylene propylene rubber or silicone rubber.
  • Diaphragm 120 constitutes valve chamber 140 together with valve casing 130 with peripheral edge 121 placed on valve casing 130.
  • the central part 122 inside the peripheral part 121 is displaced by the pressure of the fluid in the valve chamber 140.
  • the pusher 123 presses the valve body portion 151.
  • the liquid When the liquid is used as the fluid for the stop valve 101, the liquid has a large surface tension, so that a larger fluid flow path is required than when the gas is used as the fluid for the stop valve 101.
  • the stop valve 101 of this embodiment since the material of the diaphragm 120 is rubber, the movable range of the diaphragm 120 is larger than when the diaphragm 120 is formed of silicon or metal. Therefore, the stop valve 101 of this embodiment can secure a sufficient methanol flow path.
  • the valve portion 150 has a substantially circular shape and is made of a rubber having high methanol resistance, such as silicone rubber.
  • the valve unit 150 contacts or separates from the valve seat 148 due to the displacement of the diaphragm 120, and a valve body unit 151 that blocks or releases the inflow of fluid (methanol) from the inflow hole 143 to the valve chamber 140.
  • the support part 152 that supports the valve body part 151 movably in the direction in which the part 151 approaches and separates from the valve seat 148, the hole part 153 that allows methanol to pass through, and the valve part 150 are accommodated in the opening part 147.
  • the valve body portion 151 is formed with a ring-shaped valve protrusion 155 on the inflow hole 43 side, but the valve protrusion 155 is not necessarily formed.
  • valve protrusion 155 of the valve body 151 comes into contact with the valve seat 148 when the valve 150 is housed in the opening 147, and the valve body 151 flows from the inlet hole 143 to the valve chamber 140.
  • valve seat 148 is pressurized in a direction to block the inflow of the valve.
  • the valve body 151 is separated from the valve seat 148 when the diaphragm 120 is lowered and pushed down by the diaphragm 120, and the inflow hole 143 and the hole 153 communicate with each other to release the inflow of methanol into the valve chamber 140.
  • the cap part 110 has a substantially square plate shape, and is formed, for example, by molding using a stainless steel plate.
  • the cap part 110 is formed with a screw hole 111 for fixing the cap part 110 and the valve casing 130 to the system casing 160.
  • the edge 116 of the metal cap portion 110 is joined to the metal edge 132 of the valve housing 130 by welding in a state where the diaphragm 120 is placed on the placement portion 134.
  • the peripheral part 114 of the cap part 110 is joined, the peripheral part 121 of the diaphragm 120 is pressed to hold the peripheral part 121 together with the mounting part 134.
  • a hole 115 communicating with outside air is formed in the central portion 113 of the cap portion 110.
  • atmospheric pressure is applied to the upper part of the diaphragm 120.
  • a pressure receiving plate 125 made of a circular metal that receives a differential pressure between the atmospheric pressure and the internal pressure of the valve chamber 140 is joined to the diaphragm 120.
  • the stop valve 101 is configured to automatically open and close the valve unit 150 using the pressure difference when the fluid pressure reaches the set pressure. ing.
  • the valve housing 130 of this embodiment includes an annular first protruding portion 144 with which the diaphragm 120 abuts when the valve portion 150 is opened.
  • a first flow path 145 that allows methanol to pass from the inside to the outside of the protrusion 144 is formed around the inflow hole 143 on the bottom surface 141 of the valve chamber 140.
  • the inner diameter of the valve chamber 140 is Dv
  • the diameter of the pressure receiving plate 125 is Db
  • the outer diameter of the first protrusion 144 located at both ends of the inflow hole 143 is Dc. At this time, it is formed in a shape satisfying the relationship of Dc ⁇ (Dv + Db) / 4.
  • the rubber diaphragm 120 contacts the first protrusion 144 instead of the bottom surface 141 of the valve chamber 140 when the valve portion 150 is opened (see FIG. 7). Further, when the diaphragm 120 contacts the first protrusion 144, methanol passes from the inside of the first protrusion 144 to the outside of the first protrusion 144 via the first flow path 145.
  • the shape of the first protrusion 144 that satisfies the relationship of Dc ⁇ (Dv + Db) / 4 will be described in detail with reference to FIG.
  • the outer diameter Dc (4 mm in this embodiment) of the first protrusion 144 is less than half of the effective pressure receiving diameter Dp (10 mm in this embodiment).
  • the effective pressure receiving diameter corresponds to the diameter of the pressure acting on the entire surface of the diaphragm 120 excluding the pressure applied to the outer peripheral portion, that is, the diameter of the portion on which the pressure available for opening and closing the valve portion 150 acts. In the case of FIG.
  • the pressure receiving plate 125 is as shown in FIG. It bends convexly toward the hole 115 side.
  • the diaphragm 120 since the diaphragm 120 is in contact with the first protrusion 144 and the diaphragm 120 is made of rubber, the diaphragm 120 may be fixed to the first protrusion 144.
  • the pressure receiving plate 125 is bent convexly toward the hole 115 as described above, so that the diaphragm 120 is in contact with the first protrusion 144 obliquely. That is, since the diaphragm 120 and the first protrusion 144 are substantially in line contact, the diaphragm 120 and the first protrusion 144 are difficult to adhere.
  • the diaphragm 120 and the first protrusion 144 are fixed, if the pressure receiving plate 125 tries to return to the original flat state from the bent state, the adhesion is peeled off from the outside of the first protrusion 144. Therefore, the diaphragm 120 is easily peeled off from the first protrusion 144.
  • the diaphragm 120 does not contact the bottom surface 141 of the valve chamber 140, and therefore the diaphragm 120 swollen by the fluid and the bottom surface of the valve chamber 140. 141 can be prevented from adhering.
  • the stop valve 101 in this embodiment it is possible to prevent the diaphragm 120 and the bottom surface 141 of the valve chamber 140 from sticking even with a low-profile structure. Therefore, the reliability of fluid control can be improved.
  • the parts 134, 141, 144, 145 and 148 in contact with methanol of the valve housing 130 are all made of resin, and the material of the diaphragm 120 and the valve part 150 is also rubber, so that metal ions It does not elute in methanol. Therefore, in the stop valve 101 of this embodiment, the DMFC characteristic does not deteriorate due to elution of metal ions. Therefore, by using the stop valve 101 of this embodiment, the same effect can be obtained in the fuel cell system 100 including the stop valve 101.
  • FIG. 8 is a perspective view of the valve housing 230 provided in the stop valve 201 according to the second embodiment of the present invention.
  • the difference between the stop valve 201 in this embodiment and the stop valve 101 is the first protrusion 244, and the other configuration is the same as that of the stop valve 101.
  • the first projecting portion 244 is different from the first projecting portion 144 shown in FIG. 4 in that its tip is formed in a convex curved shape.
  • the first projecting portion 244 of this embodiment has a tip with a convex curved surface, so that the contact area with the diaphragm 120 when the valve portion 150 is opened is narrower than that with a flat tip. Therefore, the diaphragm 120 and the first protrusion 244 are difficult to adhere. Further, even if the diaphragm 120 and the first protrusion 244 are fixed, the diaphragm 120 is easily peeled off from the first protrusion 244. Further, when the diaphragm 120 contacts the first protrusion 244, methanol passes from the inside of the first protrusion 244 to the outside of the first protrusion 244 via the first flow path 245.
  • the stop valve 201 in this embodiment it is possible to prevent the diaphragm 120 and the first projecting portion 244 from sticking. Therefore, the reliability of fluid control can be further improved. Further, by using the stop valve 201 of this embodiment, the same effect can be obtained in a fuel cell system including the stop valve 201.
  • FIG. 9 is a perspective view of the valve housing 330 provided in the stop valve 301 according to the third embodiment of the present invention.
  • the difference between the stop valve 301 in this embodiment and the stop valve 201 is the first protrusion 344, and the other configuration is the same as that of the stop valve 201.
  • the first protrusion 344 is different from the first protrusion 244 shown in FIG. 8 in that it is an aggregate of a plurality of protrusions.
  • the first projecting portion 344 is an aggregate of a plurality of hemispherical protrusions whose tips are formed in a convex curved shape, so that the contact area with the diaphragm 120 when the valve portion 150 is opened is integral. Narrower than the first protrusion 244. Therefore, it is difficult for the diaphragm 120 and the first protrusion 344 to adhere to each other. Further, even if the diaphragm 120 and the first protrusion 344 are fixed, the diaphragm 120 is easily peeled off from the first protrusion 344. Further, when the diaphragm 120 comes into contact with the first protrusion 344, methanol passes from the inside of the first protrusion 344 to the outside of the first protrusion 344 via the first flow path 345.
  • the stop valve 301 in this embodiment it is possible to prevent the diaphragm 120 and the first projecting portion 344 from adhering to each other. Therefore, the reliability of fluid control can be further improved. Further, by using the stop valve 301 of this embodiment, the same effect can be obtained in a fuel cell system including the stop valve 301.
  • the projections forming the first projecting portion 244 are formed in a hemispherical shape, but the projections may be cylindrical in implementation.
  • FIG. 10 is a perspective view of a valve housing 430 provided in a stop valve 401 according to the fourth embodiment of the present invention.
  • the stop valve 401 in this embodiment is different from the stop valve 101 in the first protrusion 444, and the other configuration is the same as that of the stop valve 101.
  • the first projecting portion 444 has a circular shape, and has a tip area larger than that of the first projecting portion 144 shown in FIG.
  • the diaphragm 120 contacts the first protruding portion 444 instead of the bottom surface 141 of the valve chamber 140 when the valve portion 150 is opened. Further, when the diaphragm 120 comes into contact with the first protrusion 444, the methanol flows from the inflow hole 143 inside the first protrusion 444 to the outside of the first protrusion 444 via the first flow path 445. pass.
  • the same effect as the stop valve 101 can be obtained. Further, by using the stop valve 401 of this embodiment, the same effect can be obtained in a fuel cell system including the stop valve 401.
  • FIG. 11 is a perspective view of a valve housing 530 provided in a stop valve 501 according to the fifth embodiment of the present invention.
  • 12 is a cross-sectional view of a principal part taken along line SS in FIG.
  • the stop valve 501 in this embodiment is different from the stop valve 301 shown in FIG. 9 in that a second protrusion 564 is provided, and other configurations are the same as those of the stop valve 301. .
  • valve housing 530 in this embodiment includes a second protrusion 564 having a height lower than that of the first protrusion 344, and a hole 143 inside the second protrusion 564.
  • a second flow path 565 that passes outside is formed on the bottom surface 141 of the valve chamber 140 inside the first protrusion 344 and around the inflow hole 143.
  • the adhesion between the diaphragm 120 and the bottom surface 141 of the valve chamber 140 is prevented by the first protrusion 344 as in the case of the stop valve 301.
  • the first protruding portion 344 also has a function of determining the bottom dead center of the diaphragm 120 when the valve portion 150 is opened.
  • the diaphragm 120 may be connected to the first protrusion 344. It may come into contact and undergo local compression deformation, and a part of the first protrusion 344 may bite into the diaphragm 120. In this case, the first flow path 345 is narrowed by the deformed diaphragm 120, and the diaphragm 120 may obstruct the flow of methanol.
  • the second protrusion 564 having a flat tip is formed on the inner side of the first protrusion 344 lower than the first protrusion 344. Accordingly, even when the diaphragm 120 comes into contact with the first protruding portion 344 when the valve portion 150 is opened and a part of the first protruding portion 344 bites into the diaphragm 120, the second protruding portion 564 causes the second flow. Since the channel 565 is secured, a sufficient methanol channel can be secured. That is, the stop valve 501 of this embodiment has a structure having a first protrusion 344 for preventing sticking and a second protrusion 564 for securing a flow path.
  • the stop valve 501 of this embodiment since the first protrusion 344 is provided, it is possible to prevent the diaphragm 120 and the bottom surface 141 of the valve chamber 140 from sticking to each other. Further, even when the diaphragm 120 comes into contact with the first protrusion 344 and the first protrusion 344 bites into the diaphragm 120 when the valve portion 150 is opened, the second protrusion 564 can sufficiently Two flow paths 565 can be secured. For this reason, it can prevent obstructing the flow of methanol. Further, by using the stop valve 501 of this embodiment, the same effect can be obtained in the fuel cell system including the stop valve 501.
  • FIG. 13 is principal part sectional drawing of the valve housing
  • the stop valve 601 in this embodiment is different from the stop valve 301 shown in FIG. 9 in that a third protrusion 674 is provided, and other configurations are the same as those of the stop valve 301. .
  • valve housing 630 has a third protrusion 674 formed on the periphery of the inflow hole 143 on the bottom surface 141 of the valve chamber 140, and the first protrusion 344 faces the diaphragm 120. It is formed on the upper surface of the third protrusion 674.
  • the valve seat 148 is pressurized when the valve is closed by the valve body 151 in a direction to block the inflow of fluid from the inflow hole 143 to the valve chamber 140. Therefore, the peripheral portion of the inflow hole 143 in the valve housing 630 needs to have high rigidity, and it is desirable to make the thickness as thick as possible. On the other hand, in order to reduce the height of the stop valve 601, it is desirable to make the thickness of the valve housing 630 as thin as possible.
  • the thickness of the peripheral portion of the inflow hole 143 in the valve housing 630 is increased by providing the third protrusion 674.
  • the rigidity of the peripheral part of the inflow hole 143 in the valve housing 630 can be increased.
  • the flow of resin at the time of injection molding is improved, so that the occurrence of molding defects and the like can be reduced. That is, since the yield is improved, the manufacturing cost can be reduced.
  • the rigidity of the peripheral portion of the inflow hole 143 in the valve housing 630 can be increased, and the manufacturing cost can be reduced. Further, by using the stop valve 601 of this embodiment, the same effect can be obtained in a fuel cell system including the stop valve 601.
  • the diaphragm 120 contacts the first protrusion 344 instead of the bottom surface 141 of the valve chamber 140 when the valve unit 150 is opened. Further, when the diaphragm 120 comes into contact with the first protrusion 344, methanol passes from the inside of the first protrusion 344 to the outside of the first protrusion 344 via the first flow path 345. Therefore, according to the stop valve 601 in this embodiment, the same effect as the stop valve 301 can be obtained.
  • FIG. 14 is a perspective view of a valve housing 730 provided in a stop valve 701 according to the seventh embodiment of the present invention.
  • FIG. 15 is a cross-sectional view of a main part taken along line TT in FIG.
  • the main point of difference between the stop valve 701 in this embodiment and the stop valve 501 shown in FIG. 9 is that it includes a third protrusion 774, and the rest of the configuration is the same as that of the stop valve 501. It is.
  • the valve housing 730 has a third protrusion 774 and a third flow path 775 formed on the periphery of the inflow hole 143 on the bottom surface 141 of the valve chamber 140, and the first protrusion 744.
  • the second protrusion 764 is formed on the upper surface of the third protrusion 774 facing the diaphragm 120.
  • the first protruding portion 744 is a protruding portion for preventing sticking similarly to the first protruding portion 344 shown in FIG. 11, and the protrusions constituting the first protruding portion 744 are the first protruding portions 344. It is the same as the protrusion which comprises.
  • the first flow path 745 allows methanol to pass from the inner side to the outer side of the first projecting portion 744 in the same manner as the first flow path 345.
  • the second protrusion 764 is a protrusion for securing a flow path similarly to the second protrusion 564 shown in FIG. 11, and the second flow path 775 contains methanol similarly to the second flow path 565.
  • the second protrusion 564 is passed through the hole 143 inside the second protrusion 564.
  • the third projecting portion 774 is a projecting portion for improving rigidity, like the third projecting portion 674 shown in FIG. That is, the stop valve 701 of this embodiment has a structure having a first protrusion 744 for preventing sticking, a second protrusion 764 for securing a flow path, and a third protrusion 774 for improving rigidity. Yes.
  • the same effects as those of the stop valve 501 and the stop valve 601 can be obtained. Furthermore, in the stop valve 701 of this embodiment, since the third flow path 775 is provided between the second flow path 765 and the outflow hole 149, the methanol that has flowed from the inflow hole 143 flows into the second flow path. It flows straight from the path 765 to the outflow hole 149 via the third flow path 775. Therefore, according to the stop valve 701 in this embodiment, the methanol flow path can be secured from the stop valve 601 when the valve portion 150 is opened. Further, by using the stop valve 701 of this embodiment, the same effect can be obtained in a fuel cell system including the stop valve 701.
  • methanol is used as a highly active fluid, but the fluid may be any of gas, liquid, gas-liquid mixed flow, solid-liquid mixed flow, solid-gas mixed flow, and the like.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Driven Valves (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention concerne un clapet anti-retour avant et un système de pile à combustible dont on empêche le diaphragme de coller à la surface inférieure d'une chambre à clapet, même dans une structure basse. A l'intérieur d'un logement de clapet (130), une première partie saillante annulaire (144) contre laquelle un diaphragme (120) vient en butée lorsqu'une partie clapet (150) est ouverte, et des premiers canaux (145) qui laissent s'écouler le méthanol depuis l'intérieur de la partie saillante (144) vers l'extérieur, sont formés autour d'une entrée (143) dans la partie inférieure (141) de la chambre de clapet (140). Ainsi, dans le clapet anti-retour avant (101) décrit, lorsque la partie clapet (150) est ouverte, le diaphragme en caoutchouc (120) est en contact avec la première partie saillante (144), pas avec la surface inférieure (141) de la chambre de clapet (140). De plus, lorsque le diaphragme (120) est en contact avec la première partie saillante (144), le méthanol circule en dehors de la première partie saillante (144) depuis l'intérieur de la première partie saillante (144) via les premiers canaux (145).
PCT/JP2011/067126 2010-08-20 2011-07-27 Clapet anti-retour avant et système de pile à combustible WO2012023396A1 (fr)

Priority Applications (1)

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JP2012529542A JP5510551B2 (ja) 2010-08-20 2011-07-27 順止バルブ、燃料電池システム

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JP2010184874 2010-08-20
JP2010-184874 2010-08-20

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WO2012023396A1 true WO2012023396A1 (fr) 2012-02-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130014452A (ko) * 2011-07-29 2013-02-07 아구스타웨스트랜드 에스.피.에이. 전환식 항공기
WO2023167284A1 (fr) * 2022-03-04 2023-09-07 株式会社村田製作所 Soupape, et dispositif de régulation de fluide

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004031199A (ja) * 2002-06-27 2004-01-29 Canon Inc 燃料電池および電気機器
JP2008059097A (ja) * 2006-08-29 2008-03-13 Canon Inc 圧力制御弁、圧力制御弁の製造方法、圧力制御弁を搭載した燃料電池システム及びその圧力制御方法
JP2008169976A (ja) * 2007-01-15 2008-07-24 Fuji Koki Corp 制御弁

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004031199A (ja) * 2002-06-27 2004-01-29 Canon Inc 燃料電池および電気機器
JP2008059097A (ja) * 2006-08-29 2008-03-13 Canon Inc 圧力制御弁、圧力制御弁の製造方法、圧力制御弁を搭載した燃料電池システム及びその圧力制御方法
JP2008169976A (ja) * 2007-01-15 2008-07-24 Fuji Koki Corp 制御弁

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130014452A (ko) * 2011-07-29 2013-02-07 아구스타웨스트랜드 에스.피.에이. 전환식 항공기
KR101958331B1 (ko) 2011-07-29 2019-03-15 아구스타웨스트랜드 에스.피.에이. 전환식 항공기
WO2023167284A1 (fr) * 2022-03-04 2023-09-07 株式会社村田製作所 Soupape, et dispositif de régulation de fluide

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JPWO2012023396A1 (ja) 2013-10-28

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