US20060013703A1 - Multi-channel pump and its control method - Google Patents

Multi-channel pump and its control method Download PDF

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Publication number
US20060013703A1
US20060013703A1 US11/176,504 US17650405A US2006013703A1 US 20060013703 A1 US20060013703 A1 US 20060013703A1 US 17650405 A US17650405 A US 17650405A US 2006013703 A1 US2006013703 A1 US 2006013703A1
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Prior art keywords
pump chamber
side active
inflow
pump
outflow
Prior art date
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Abandoned
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US11/176,504
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English (en)
Inventor
Mitsuo Yokozawa
Kenji Muramatsu
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Nidec Sankyo Corp
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Nidec Sankyo Corp
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Assigned to SANKYO SEIKI MFG. CO., LTD. reassignment SANKYO SEIKI MFG. CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MURAMATSU, KENJI, YOKOZAWA, MITSUO
Publication of US20060013703A1 publication Critical patent/US20060013703A1/en
Priority to US12/246,102 priority Critical patent/US8163440B2/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • 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
    • H01M8/04186—Arrangements for control of reactant parameters, e.g. pressure or concentration of liquid-charged or electrolyte-charged reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/30—Fuel cells in portable systems, e.g. mobile phone, laptop
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/10—Applications of fuel cells in buildings
    • 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 multi-channel pump which is used in a direct methanol type fuel cell or the like and a control method for the multi-channel pump.
  • multi-channel pump means a pump which is provided with a plurality of outflow passages for discharging fluid.
  • DMFC Direct Methanol Fuel Cell
  • Various DMFC's have been proposed which are provided with a power generating device having a power generating part (cell), an accommodating vessel for accommodating methanol or methanol aqueous solution (hereinafter, referred to as methanol), and a liquid feed pump for feeding methanol forcibly from the accommodating vessel (see, for example, Japanese Patent Laid-Open No. 2004-71262, Japanese Patent Laid-Open No. 2004-127618, and Japanese Patent Laid-Open No. 2004-152741).
  • the cell includes an anode electrode (fuel electrode) having an anode collector and an anode catalyst layer, a cathode electrode (air electrode) having a cathode collector and a cathode catalyst layer, and an electrolyte membrane disposed between the anode electrode and the cathode electrode.
  • Methanol is supplied to the anode electrode by a liquid feed pump and air is supplied to the cathode electrode by an air supply pump.
  • the activity of methanol oxidation is low in the anode electrode of the cell which is the power generating part of an above-mentioned DMFC and thus a voltage loss occurs. Further, a voltage loss occurs in the cathode electrode. Therefore, an output capable of being obtained from one cell becomes extremely low. Accordingly, a plurality of cells is used in the DMFC to obtain a prescribed output
  • crossover occurs which means that a part of the methanol transmits through the electrolyte membrane in an unreacted state and leaks to the cathode electrode. Since the crossover causes the electric potential of the cathode electrode to decrease, the voltage loss occurs in the cathode electrode. Further, unreacted methanol that is reaches the cathode electrode is not related to power generation but reacts with oxygen to generate heat, and thus the power-generating efficiency in the cell is significantly reduced by the crossover. Accordingly, it is preferable not to supply excessive methanol to the anode electrode.
  • liquid feed pump for supplying methanol to the anode electrode of a cell
  • the liquid feed pump having such characteristics has not been proposed.
  • the present invention may advantageously provide a multi-channel pump which is provided with a plurality of outflow passages for discharging fluid and capable of accurately discharging an appropriate amount of fluid and provide a control method for the multi-channel pump.
  • the present invention may advantageously provide a multi-channel pump which is capable of being mounted in a small-sized DMFC or the like that is used in a portable electronic device or the like.
  • a multi-channel pump including a pump chamber, an inflow passage for fluid which is connected to the pump chamber, two or more outflow passages which are connected to the pump chamber, outflow side active valves which are provided in the outflow passages so as to correspond to the outflow passages, and a movable body which is reciprocated to change the volumetric capacity of the pump chamber.
  • the multi-channel pump is provided with two or more outflow passages which are connected to a pump chamber through outflow side active valves. Accordingly, the reverse flow of the fluid can be surely prevented when the outflow side active valve is closed. Further, the discharge destination of the fluid discharged from the outflow passage can be controlled by the outflow side active valve.
  • the multi-channel pump is provided with one movable body which is reciprocated to change the volume of the pump chamber. Therefore, since the fluid is discharged from the respective outflow passages by using one movable body, the discharging performance becomes uniform and thus the variation of the discharge amount from the respective outflow passages is restrained and an appropriate amount of fluid can be accurately discharged.
  • an inflow passage is connected to the pump chamber to which a plurality of outflow passages are connected. Therefore, the inflow passage can be provided in common for the plurality of outflow passages and thus the structure of the pump can be simplified. In addition, since only one movable body is provided, the structure of the pump is also simplified. Accordingly, the downsizing of the pump can be attained and the pump can be mounted in a small-sized device such as a DMFC that is used in a portable electronic device.
  • the movable body is preferably a piston which is reciprocated within a cylinder that is connected to the pump chamber.
  • the moving quantity of the piston is relatively easy to control and thus a minute flow rate can be accurately discharged.
  • the multi-channel pump preferably includes a piston rod to which the piston is fixed, a male screw formed on the outer peripheral part of the piston rod, a rotation body which is formed with a female screw threadedly engaging with the male screw to make the piston reciprocate, and a piston drive motor which drives the rotation body to rotate.
  • the moving quantity of the piston can be controlled by the pitch of the screw and the rotation quantity of the piston drive motor and thus a minute flow rate can be accurately discharged with a simple structure.
  • the piston drive motor is preferably a stepping motor.
  • the moving quantity of the piston can be further accurately controlled.
  • the multi-channel pump is preferably provided with two or more inflow passages. According to the construction described above, for example, when fluid accommodating vessels are respectively connected to the respective inflow passages, the fluid accommodating vessel can be easily replaced.
  • the inflow passage is preferably connected to the pump chamber through an inflow side active valve.
  • the reverse flow from the pump chamber to the inflow passage can be surely prevented in comparison with the case where the inflow passage is connected to the pump chamber through a passive valve.
  • the multi-channel pump may include a first flow passage provided in the inflow passage and having a passive valve which is capable of opening in an inflow direction to the pump chamber, and a second flow passage provided in the inflow passage and having a passive valve which is capable of opening in an outflow direction from the pump chamber.
  • the inflow side active valve is preferably provided between the first flow passage, the second flow passage and the pump chamber.
  • the fluid is liquid and a detector for detecting presence of bubbles may be provided in the pump chamber.
  • the inflow passage is connected to the pump chamber through an inflow side active valve which is opened and closed by a drive actuator for inflow side active valve
  • the outflow side active valves which are provided so as to correspond to the two or more outflow passages are individually opened and closed by a drive actuator for outflow side active valve
  • the movable body is a piston which is reciprocated within a cylinder that is connected to the pump chamber.
  • the drive actuator for outflow side active valve is a valve opening/closing drive motor
  • a cam is provided which is moved by the valve opening/closing drive motor
  • the outflow side active valves provided so as to correspond to the outflow passages are individually opened and closed by the cam. Therefore, a plurality of outflow side active valves are successively opened and closed by the cam which is moved by the valve opening/closing drive motor.
  • a control method for a multi-channel pump including a suction step in which the inflow side active valve is opened and the fluid is sucked into the pump chamber by a suction operation of the movable body and then the inflow side active valve is closed, an initial discharge step after the suction step in which one of the outflow side active valves is opened and the fluid is discharged from the pump chamber by the discharge operation of the movable body to eliminate backlash of the pump, and a discharge step after the initial discharge step in which an outflow side active valve is successively opened and a prescribed amount of the fluid is discharged by the discharge operation of the movable body.
  • a control method for a multi-channel pump including a suction step in which the inflow side active valve is opened and the fluid is sucked into the pump chamber from a first flow passage by a suction operation of the movable body, an initial discharge step after the suction step in which the backlash of the pump is eliminated by means of that the fluid is discharged from the pump chamber to a second flow passage by the discharge operation of the movable body and then the inflow side active valve is closed, and a discharge step after the initial discharge step in which an outflow side active valve is successively opened and a prescribed amount of the fluid is discharged by the discharge operation of the movable body.
  • the initial discharge step for eliminating the backlash of the pump is provided between the suction step and the discharge step. Therefore, the relationship between the moving quantity of the movable body and the discharge amount from the outflow passage can be maintained in a linear manner from the beginning of the discharge step. Accordingly, when the moving quantity of the movable body is appropriately controlled, the discharge amount from the outflow passage where the fluid is firstly discharged in the discharge step can be accurately controlled and thus the variation of the discharge amounts from the respective outflow passages can be reduced.
  • fluid is collectively sucked in the suction step which is required to discharge from the outflow passages by a plurality of times in the discharge step. Therefore, even when the discharge amount of the fluid which is discharged from the respective outflow passages is a significantly small amount, the suction amount can be ensured to some extent Accordingly, the capacity of the multi-channel pump can be increased and the self-feeding performance can be easily attained.
  • backlash of a pump means a phenomenon that, when the operation of the movable body is changed from suction to discharge, a linear relationship is not obtained between the moving quantity of the movable body and the discharge amount from the outflow passage. This is a phenomenon occurred by the backlash of a mechanism for driving the movable body.
  • the multi-channel pump since two or more outflow passages are connected to the pump chamber through the outflow side active valves, the reverse flow of fluid can be surely prevented when the outflow side active valves are closed and the discharge destination of the fluid discharged from the outflow passage can be controlled by using the outflow side active valve.
  • the multi-channel pump is provided with one movable body that is reciprocated to change the volume of the pump chamber. Therefore, the discharging performance becomes uniform and thus the variation of discharge amount from the respective outflow passages can be restrained and an appropriate amount of fluid can be accurately discharged.
  • an inflow passage is connected to the pump chamber to which a plurality of outflow passages are connected Therefore, the inflow passage can be provided in common for the plurality of outflow passages and thus the structure of the pump can be simplified. In addition, since only one movable body is provided, the structure of the pump is also simplified. As a result, the downsizing of the pump can be attained.
  • the initial discharge step for eliminating the backlash of the pump is provided between the suction step and the discharge step. Therefore, the relationship between the moving quantity of the movable body and the discharge amounts from the outflow passages can be maintained in a linear manner from the beginning of the discharge step. Accordingly, the discharge amount from the outflow passage where the fluid is firstly discharged in the discharge step can be also accurately controlled and thus the variation of the discharge amounts from the respective outflow passages can be reduced. As a result, an appropriate amount of fluid can be accurately discharged from the respective outflow passages.
  • FIG. 1 is a schematic view showing a basic structure of a multi-channel pump in accordance with an embodiment of the present invention
  • FIG. 2 is a perspective view showing a concrete structure of the multi-channel pump shown in FIG. 1 which is viewed from the discharge side of methanol.
  • FIG. 3 is a perspective view showing the multi-channel pump shown in FIG. 2 which is viewed from the “X” direction.
  • FIG. 4 is a perspective view showing the multi-channel pump shown in FIG. 2 which is cut in the “Y” cross section.
  • FIG. 5 is an exploded perspective view showing an opening/closing mechanism of active valves of the multi-channel pump shown in FIG. 2 .
  • FIG. 6 is a plan view showing a structure of inflow passages and outflow passages of the multi-channel pump shown in FIG. 2 .
  • FIG. 7 is a timing chart showing a control method of the multi-channel pump shown in FIG. 2 .
  • FIG. 1 is a schematic view showing a basic structure of a multi-channel pump in accordance with an embodiment of the present invention.
  • a multi-channel pump 1 in accordance with an embodiment of the present invention is used as a liquid feed pump for feeding methanol forcibly in a DMFC used, for example, in a portable electronic device.
  • the multi-channel pump 1 includes a pump chamber 2 , inflow passages 3 connected to the pump chamber 2 , two or more outflow passages 4 connected to the pump chamber 2 through outflow side active valves 6 , and a movable body 13 which is reciprocated to change the volumetric capacity of the pump chamber 2 . More concretely, two inflow passages 3 a, 3 b are connected to a pump chamber 2 and eight outflow passages 4 a through 4 h are connected to the pump chamber 2 through eight outflow side active valves 6 a through 6 h.
  • first flow passages 8 a, 8 b first flow passage 8
  • passive valves 10 a, 10 b passive valve 10
  • second flow passage 9 second flow passage 9
  • the first flow passage 8 and the second flow passage 9 are arranged so as to be capable of connecting to a methanol accommodating vessel (not shown in the drawing and, hereinafter, refereed to as an accommodating vessel).
  • the first flow passage 8 is arranged so as to be capable of connecting to the under side of the accommodating vessel and the second flow passage 9 is arranged so as to be capable of connecting to the upper side of the accommodating vessel.
  • the passive valve 10 is a normal valve, which is, for example, made of rubber and opens in only one direction by fluid pressure.
  • the passive valve 10 is provided in the first flow passage 8 which is the inflow passage and thus the passive valve 10 opens when a pressure is applied in a suction direction of methanol directing to the pump chamber 2 but does not open even when a pressure is applied in a discharge direction of methanol directing to the accommodating vessel.
  • the passive valve 11 is also a normal valve, which is, for example, made of rubber and the passive valve 11 is provided in the second flow passage 9 , which is the outflow passage. The passive valve 11 opens when a pressure is applied in a discharge direction of methanol directing to the accommodating vessel but does not open even when a pressure is applied in a suction direction of methanol directing to the pump chamber 2 .
  • the first flow passage 8 a and the second flow passage 9 a, and the first flow passage 8 b and the second flow passage 9 b are respectively connected to different accommodating vessels.
  • the inflow side active valves 5 a, 5 b are capable of being individually opened or closed by a drive actuator (not shown in FIG. 1 ).
  • Eight outflow passages 4 a through 4 h are respectively connectable to eight cells (not shown in the drawing) as power generating parts of the DMFC.
  • the methanol discharged from the outflow passages 4 a through 4 h are capable of being supplied to the anode electrodes of the cells.
  • the outflow side active valves 6 a through 6 h are individually openable/closable by a drive actuator (not shown in FIG. 1 ) similarly to the inflow side active valves 5 a, 5 b.
  • the movable body 13 in this embodiment of the present invention is a piston (hereinafter, referred to as a piston 13 ) which is reciprocated within a cylinder 14 connected to the pump chamber 2 .
  • the piston 13 is fixed on the upper end of a piston rod 15 in the drawing.
  • the piston rod 15 is connected to a drive actuator (not shown in FIG. 1 ) and is reciprocated within the cylinder 14 by the drive actuator.
  • FIG. 2 is a perspective view showing the concrete structure of the multi-channel pump shown in FIG. 1 that is viewed from the discharge side of methanol.
  • FIG. 3 is a perspective view showing the multi-channel pump shown in FIG. 2 that is viewed from the “X” direction.
  • FIG. 4 is a perspective view showing the multi-channel pump shown in FIG. 2 which is cut in the “Y” cross section
  • FIG. 5 is an exploded perspective view showing an opening/closing mechanism of active valves of the multi-channel pump shown in FIG. 2 .
  • FIG. 6 is a plan view showing the structure of inflow passages and outflow passages of the multi-channel pump shown in FIG. 2 .
  • a base part 24 and a bracket 31 are connected to each other with screws through four pole braces 32 to construct a main body frame.
  • a driving mechanism for the piston 13 and an opening/closing mechanism for the inflow side active valves 5 a, 5 b and the outflow side active valves 6 a through 6 h are fixed and held on a base plate 25 and a bracket 31 constructing the base part 24 .
  • the arrows in FIG. 4 show an example of the flowing of methanol in the pump 1 .
  • the bracket 31 is provided with a semi-cylindrical extended part 31 a which is extended downward in FIG. 2 .
  • On the inner peripheral side of the extended part 31 a are formed concave grooves 31 b, 31 b at two positions by a pitch of approximately 180° which construct the detent portion of the piston 13 along with protruded parts 18 a of a slide plate 18 described below.
  • the base part 24 includes a base plate 25 , in which the pump chamber 2 , the inflow passages 3 , the outflow passages 4 , the first flow passages 8 and the second flow passages 9 are formed, an active valve plate 29 integrally provided with the inflow side active valves 5 and the outflow side active valves 6 , a valve presser plate 26 pressing the active valve plate 29 , a port 27 formed with outflow ports 40 ( 40 a through 40 h ) which are aperture ends of the outflow passages 4 , suction ports 80 ( 80 a, 80 b ) which are aperture ends of the first flow passages 8 , and discharge ports 90 ( 90 a, 90 b ) which are aperture ends of the second flow passages 9 , and a port presser plate 28 pressing the port 27 .
  • the valve presser plate 26 , the active valve plate 29 , the base plate 25 , the port 27 , and the port presser plate 28 are laminated in this order.
  • the piston 13 is moved so as to be reciprocated in the inside of the cylinder 14 by a piston drive motor 51 .
  • the cylinder 14 is integrally formed with the base plate 25 so as to be connected to the pump chamber 2 (see FIG. 4 ).
  • the structure of the driving mechanism for the piston 13 will be described below.
  • the piston drive motor 51 is concretely a stepping motor and fixed to the bracket 31 with a screw. In this embodiment of the present invention, the piston drive motor 51 rotates in forward and reverse directions.
  • a small gear 53 is fixed on the tip end of the output shaft of the piston drive motor 51 .
  • An idle gear 19 is rotatably supported by a fixed shaft 20 which is fixed to the bracket 31 so as to be engaged with the small gear 53 .
  • a gear 17 is rotatably held by a bearing 61 which is fixed on the outer peripheral part of the cylinder 14 so as to be engaged with the idle gear 19 .
  • the gear 17 is formed in an approximately bottomed cylindrical shape. On the center portion of the bottom part of the gear 17 is fixed a nut 16 as a rotation body on which a female screw 16 a is formed. On the other hand, a male screw 15 a is formed on the outer peripheral part of the piston rod 15 to which the piston 13 is fixed on one end and the male screw 15 a is threadedly engaged with the female screw 16 a. Further, on the other end of the piston rod 15 is fixed a slide plate 18 in which there are protruded parts 18 a, 18 a engaging with the concave grooves 31 b formed in the extended part 31 a of the bracket 31 are formed at two positions by a pitch of approximately 180° (see FIG. 3 ). The rotation of the piston 13 is prevented by the protruded parts 18 a and the concave grooves 31 b.
  • sealing members On the outer peripheral side of the piston 13 are fixed sealing members (oil-seal) 63 , 63 for preventing the leakage of methanol which is sucked in the pump chamber 2 .
  • the driving mechanism for the piston 13 constructed as described above, when the piston drive motor 51 is rotated, the driving force is transmitted to the gear 17 through the small gear 53 and the idle gear 19 .
  • the driving force of the piston drive motor 51 is transmitted to the gear 17 , the nut 16 is rotated together with the gear 17 .
  • the rotation preventing or detent mechanism for the piston 13 is structured on the other end side of the piston rod 15 on which the male screw 15 a is formed to engage threadedly with the female screw 16 a of the nut 16 . Therefore, the rotary motion of the nut 16 is converted into the straight motion of the piston 13 .
  • the piston 13 is reciprocated in the inside of the cylinder 14 by the piston drive motor 51 that rotates in the both directions.
  • the inflow side active valves 5 and the outflow side active valves 6 are capable of being individually opened or closed by a valve opening/closing drive motor 52 .
  • the opening/closing mechanism of the inflow side active valves 5 and the outflow side active valves 6 includes a cam 36 and a plate spring 37 in addition to the valve opening/closing drive motor 52 as principal components (see FIG. 5 ).
  • the structure of the opening/closing mechanism for the inflow side active valves 5 and the outflow side active valves 6 will be described below.
  • the valve opening/closing drive motor 52 is concretely a stepping motor which is fixed to the bracket 31 with a screw. In this embodiment of the present invention, the valve opening/closing drive motor 52 rotates in one direction (counter clockwise direction in FIG. 5 ).
  • a small gear 54 is fixed at the tip end of the output shaft of the valve opening/closing drive motor 52 .
  • a cam 36 is provided with a gear 36 a engaging with the small gear 54 and rotatably supported by a bearing 62 that is fixed on the outer peripheral part of the cylinder 14 . In the embodiment of the present invention, the cam 36 is rotated by the valve opening/closing drive motor 52 in the clockwise direction in FIG. 5 .
  • the bearing 61 and the bearing 62 are fixed on the outer peripheral part of the cylinder 14 such that they overlap each other in the moving direction of the piston 13 .
  • the cam 36 and the gear 17 are disposed so as to overlap each other in the moving direction of the piston 13 (see FIG. 4 ).
  • the cam 36 is formed in a cylindrical shape and provided with a flange part.
  • the gear 36 a is formed on the outer peripheral face of the flange part of the cam 36 .
  • On the outer peripheral face of the cam 36 is fixed a pin 38 protruding in the radial direction for causing the inflow side active valves 5 and the outflow side active valves 6 to open and close.
  • the plate spring 37 includes, as shown in FIG. 5 , a ring-shaped center part 37 a, ten arm parts 37 b extended from the center part 37 a outward in the radial direction in a spiral manner, valve holding parts 37 c respectively formed at the tip end of the arm part 37 b, and a tip end part 37 d which is formed so as to be bent upward in the drawing from the outer end of the valve holding part 37 c in the radial direction and then bent toward the center part 37 a.
  • the tip end part 37 d is provided with a sliding part 37 d 1 capable of contacting with the pin 38 and a guide part 37 d 2 which is bent from the sliding part 37 d 1 obliquely upward in the drawing to guide the pin 38 to the sliding part 37 d 1 .
  • the notational symbols are shown for some of the arm parts 37 b, the valve holding parts 37 c, and the tip end parts 37 d of the plate spring 37 for convenience.
  • the plate spring 37 is fixed to the outer peripheral face of the cylinder 14 through its center part 37 a.
  • the pin 38 is positioned on the upper side of the under face of the sliding part 37 d 1 and on the under side of the upper end portion of the guide part 37 d 2 in the vertical direction in FIG. 5 . Therefore, when the cam 36 is rotated, the pin 38 is guided to the under face of the sliding part 37 d 1 through the guide part 37 d 2 , and the arm part 37 b is deflected and thus the valve holding part 37 c and the tip end part 37 d are lift upward in FIG. 5 .
  • the active valve plate 29 is made, for example, of rubber and integrally provided with the inflow side active valves 5 a, 5 b and the outflow side active valves 6 a through 6 h which are concentrically formed with a pitch of equal angle.
  • the inflow side active valves 5 a, 5 b and the outflow side active valves 6 a through 6 h are normally urged to be in a closed state by the elasticity of rubber of the active valve plate 29 . Concretely, they are urged downward in FIG. 5 .
  • the upper ends of the inflow side active valves 5 a, 5 b and the outflow side active valves 6 a through 6 h are respectively held by the valve holding parts 37 c of the plate spring 37 .
  • the driving force of the valve opening/closing drive motor 52 is transmitted to the gear 36 a through the small gear 54 .
  • the cam 36 is rotated and the pin 38 is also rotated together with the cam 36 .
  • the pin 38 is guided to the under face side of the sliding part 37 d 1 through the guide part 37 d 2 , which causes the arm part 37 b to be deflected, and the valve holding part 37 c is lifted upward in FIG. 5 .
  • either one of the inflow side active valves 5 a, 5 b or the outflow side active valves 6 a through 6 h which are held in the valve holding parts 37 c is lifted upward to be in an open state.
  • the pin 38 is further rotated and disengaged from the under face of the sliding part 37 d 1 , the active valve in the open state becomes to be in a closed state by the urging force.
  • the pin 38 is guided by the succeeding guide part 37 d 2 to the under face side of the sliding part 37 d 1 and the succeeding active valve becomes in an open state similarly to the above-mentioned case.
  • the pump chamber 2 , the inflow passages 3 , the outflow passages 4 , the first flow passages 8 and the second flow passages 9 are formed in the base plate 25 as described above.
  • the pump chamber 2 is formed in an approximately central part of the base plate 25 and provided with ten passages which radially extend toward the inflow side active valves 5 a, 5 b and the outflow side active valves 6 a through 6 h (see FIG. 6 ).
  • a detector (not shown) for detecting the presence of bubbles may be provided in the pump chamber 2 .
  • the outflow passages 4 a through 4 h are formed so as to direct from the outflow side active valves 6 a through 6 b toward the outer side of the base plate 25 .
  • the inflow passages 3 a, 3 b are respectively formed between the inflow side active valves 5 a, 5 b and the passive valves 10 a and 11 a, 10 b and 11 b formed in an umbrella-shape (see FIGS. 4 and 6 ).
  • the first passages 8 a, 8 b are respectively formed on the outer side of the passive valves 10 a, 10 b and the second passages 9 a, 9 b are formed on the outer side of the passive valves 11 a, 11 b.
  • FIG. 7 is a timing chart showing the control method of the multi-channel pump in FIG. 2 .
  • the pump 1 is controlled by a control method including a suction step “S 1 ” in which the inflow side active valve 5 is opened and methanol is sucked into the pump chamber 2 from the first flow passage 8 by a suction operation of the piston 13 , an initial discharge step “S 2 ” after the suction step “S 1 ” in which the backlash of the pump 1 is eliminated by means of that methanol is discharged from the pump chamber 2 to the second flow passage 9 by the discharge operation of the piston 13 and then the inflow side active valve 5 is closed, and a discharge step “S 3 ” after the initial discharge step “S 2 ” in which an outflow side active valve 6 is successively opened and a prescribed amount of methanol is discharged by the discharge operation of the piston 13 .
  • the control method will be described in detail below.
  • the portions on the under side of the center horizontal line where the hatching is applied indicate states of a discharge operation in which the piston 13 is operated in the discharge direction (left direction in FIG. 4 ).
  • the portion on the upper side of the center horizontal line where the hatching is applied indicates the state of a suction operation in which the piston 13 is operated in the suction direction (right direction in FIG. 4 ).
  • the portions where the hatching is applied indicate states in which the respective active valves are opened.
  • the valve opening/closing drive motor 52 is driven to make the inflow side active valve 5 b to be in an open state.
  • the piston 13 is moved in the discharge direction of methanol by the piston drive motor 51 .
  • the discharge operation by the piston 13 is performed to the top dead point (home position) and the origin-reset of the piston 13 is performed (origin-reset step “S 0 ”).
  • methanol is discharged to the second flow passage 9 b from the pump chamber 2 through the passive valve 11 b which is capable of being in an open state.
  • the piston drive motor 51 is driven to move the piston 13 in the suction direction of methanol.
  • the suction operation of the piston 13 is performed, for example, to the bottom dead point of the piston 13 .
  • Methanol is sucked into the pump chamber 2 from the first flow passage 8 b through the passive valve 10 b which is capable of being in an open state by the suction operation of the piston 13 ,
  • the inflow side active valve 5 b is closed (initial discharge step “S 2 ”).
  • the piston 13 is moved in the discharge direction of methanol by the piston drive motor 51 until the backlash of pump 1 is eliminated.
  • Methanol is discharged to the second flow passage 9 b by the discharge operation of the piston 13 through the passive valve 11 b which comes to be in an open state, and after that the inflow side active valve 5 b is closed by the valve opening/closing drive motor 52 .
  • a prescribed outflow side active valve 6 is successively opened and a predetermined amount of methanol is discharged by the discharge operation of the piston 13 (discharge step “S 3 ”).
  • the outflow side active valve 6 f is set to be in an open state by the valve opening/closing drive motor 52
  • the discharge operation of the piston 13 is performed by the piston drive motor 51 to discharge a predetermined amount of methanol to the outflow passage 4 f
  • the outflow side active valve 6 f is set to be in a closed state and the outflow side active valve 6 g is set to be in an open state by the valve opening/closing drive motor 52 and the discharge operation of the piston 13 is performed to discharge a predetermined amount of methanol from the outflow passage 4 g.
  • the discharge operation of the piston 13 is, for example, performed under the state that the inflow side active valve 5 b is set to be in an open state.
  • the bubbles can be discharged to the second flow passage 9 b through the passive valve 11 b capable of being in an open state. Further, at the starting time of the pump 1 or after the exchange of the accommodating vessel, bubbles can be discharged by performing similar operations.
  • the opening/closing operation of the inflow side active valve 5 a is performed by the valve opening/closing drive motor 52 even though a series of the above-mentioned operations are not used. However, a series of the above-mentioned operations are not affected even when the inflow side active valve 5 a is set to be in an open state as long as the piston 13 is not moved.
  • the multi-channel pump 1 in accordance with the embodiment of the present invention is provided with the outflow side active valves 6 a through 6 b. Therefore, the reverse flow of methanol from the outflow passages 4 a through 4 h to the pump chamber 2 can be surely prevented. Further, the discharge destinations of methanol which is discharged from the outflow passages 4 a through 4 h can be controlled by the outflow side active valves 6 a through 6 h. In addition, in the multi-channel pump 1 , methanol is discharged from the respective outflow passages 4 a through 4 h by the discharge operation of one piston 13 .
  • inflow passages 3 a, 3 b are connected to the pump chamber 2 to which eight outflow passages 4 a through 4 h are connected. Therefore, the inflow passages 3 a, 3 b can be commonly used for a plurality of outflow passages 4 a through 4 h and thus the structure of the pump 1 can be simplified. Further, since only one piston 13 is used and thus the structure of the pump 1 can be further simplified. Accordingly, the downsizing of the pump 1 can be attained and thus the pump 1 can be mounted in a small-sized device such as, for example, a DMFC used in a portable electronic device.
  • a small-sized device such as, for example, a DMFC used in a portable electronic device.
  • the drive mechanism for the piston 13 includes a piston rod 15 on which a male screw 15 a is formed on its outer peripheral part, a nut 16 on which a female screw 16 a for threadedly engaging with the male screw 15 a is formed, and a piston drive motor 51 which rotationally drives the nut 16 through a gear 17 and the like. Therefore, the moving quantity of the piston 13 can be controlled with the pitch of the screw and the quantity of rotation of the piston drive motor 51 . Accordingly, a minute flow rate can be discharged from the outflow passages 4 a through 4 h . Further, the accuracy of a discharge flow rate can be enhanced.
  • the piston drive motor 51 is a stepping motor
  • the moving quantity of the piston 13 can be further accurately controlled.
  • a minute flow rate such as, for example, 0.01 cc can be accurately discharged from the respective outflow passages 4 a through 4 h. Further, a minute flow rate can be intermittently discharged.
  • the multi-channel pump 1 is provided with two inflow passages 3 a, 3 b. Therefore, when accommodating vessels are connected to the respective inflow passages 3 a, 3 b, the exchanging work of the accommodating vessel becomes easy.
  • the one end sides of the inflow passages 3 a, 3 b are connected to the pump chamber 2 through the inflow side active valves 5 a, 5 b. Therefore, the reverse flow from the pump chamber 2 to the inflow passages 3 a, 3 b can be surely prevented
  • the initial discharge step “S 2 ” for eliminating the backlash of the pump 1 is provided between the suction step “S 1 ” and the discharge step “S 3 ”. Therefore, in the discharge step “S 3 ”, the relationship between the moving quantity of the piston 13 and the discharge amounts from the outflow passages 4 a through 4 h can be maintained in a linear manner from the beginning. Accordingly, when the moving quantity of the piston 13 is appropriately controlled, the discharge amount of the fluid from the outflow passage 4 f which is firstly discharged in the discharge step “S 3 ” can be accurately controlled and thus the variation of the discharge amounts from the respective outflow passages 4 a through 4 h can be reduced.
  • methanol is sucked in the suction step “S 1 ” which is required to discharge from the outflow passages 4 a through 4 h by a plurality of times in the discharge step “S 3 ”. Therefore, even when the discharge amount of methanol which is discharged from the respective outflow passages 4 a through 4 h is a significantly small amount, the suction amount can be ensured to some extent. For example, even when each of the discharge amounts from the respective outflow passages 4 a through 4 h is 1 ( ⁇ l), the suction amount can be totally 8 ( ⁇ l). Accordingly, the capacity of the pump 1 can be increased and the self-feeding performance can be easily attained.
  • the multi-channel pump 1 in accordance with an embodiment of the present invention is a piston type pump in which the piston 13 is used as a movable body.
  • the present invention is not limited to a piston type pump and a diaphragm type pump provided with only one movable body may be used. Further, the present invention may be applied to other types of pumps.
  • the inflow side active valves 5 and the outflow side active valves 6 are driven so as to be opened or closed by the valve opening/closing drive motor 52 which is a common drive actuator.
  • drive actuators may be provided for each of the respective active valves or a plurality of drive actuators may be provided each of which opens and closes some of the active valves.
  • piston drive motor 51 is not limited to a stepping motor and may utilize other types of a motors.
  • drive actuator for the piston 13 is not limited to a motor and various types of a drive actuators may be used.
  • inflow passages 3 a, 3 b are provided, but only one inflow passage may be provided.
  • three or more inflow passages may be provided
  • control method for the multi-channel pump 1 is not limited to the above mentioned control method.
  • the pump 1 may be controlled by a control method which includes a suction step in which the inflow side active valve 5 is opened and methanol is sucked into the pump chamber 2 by the suction operation of the piston 13 and then the inflow side active valve 5 is closed, an initial discharge step after the suction step in which one of the outflow side active valves 6 is opened and the methanol is discharged from the pump chamber 2 by the discharge operation of the piston 13 to eliminate the backlash of the pump 1 , and a discharge step after the initial discharge step in which an outflow side active valve 6 is successively opened and a prescribed amount of methanol is discharged by the discharge operation of the piston 13 .
  • the initial discharge step for eliminating the backlash of the pump 1 is provided between the suction step and the discharge step. Therefore, in the discharge step, the relationship between the moving quantity of the piston 13 and the discharge amount from the outflow passage 4 can be maintained in a linear manner from the beginning. Thus, the variation of the discharge amounts from the respective outflow passages 4 can be reduced.
  • methanol is collectively sucked in the suction step which is required to discharge from the outflow passage 4 by a plurality of times. Therefore, even when the discharge amount of methanol which is discharged from the respective outflow passages 4 is a significantly small amount, the suction amount can be ensured to some extent Accordingly, the capacity of the pump 1 can be increased and the self-feeding performance can be easily attained
  • the fluid used is not limited to methanol and methanol aqueous solution.
  • Ethanol (ethyl-alcohol) and its aqueous solution or another liquid may be used.
  • the multi-channel pump in accordance with the embodiment of the present invention is not limited to a fuel cell.
  • the multi-channel pump may be used in the field of an analyzing device for chemical substance and may be used in substitution for a plurality of cylinder pump which is used in a dropping device of trace reagent

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (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)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Fuel Cell (AREA)
US11/176,504 2004-07-15 2005-07-07 Multi-channel pump and its control method Abandoned US20060013703A1 (en)

Priority Applications (1)

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US12/246,102 US8163440B2 (en) 2004-07-15 2008-10-06 Fuel cell and control method therefor

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JP2004-208551 2004-07-15
JP2004208551A JP4634085B2 (ja) 2004-07-15 2004-07-15 多チャンネルポンプ、燃料電池及びそれらの制御方法

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090035629A1 (en) * 2004-07-15 2009-02-05 Nidec Sankyo Corporation Multi-channel pump, fuel cell and control methods therefor
US20090130532A1 (en) * 2006-02-13 2009-05-21 Nidec Sankyo Corporation Mixing Pump Device and Fuel Cell
US20090253019A1 (en) * 2006-05-22 2009-10-08 Mitsuo Yokozawa Mixing pump device and fuel cell
US20090317687A1 (en) * 2006-05-22 2009-12-24 Mitsuo Yokozawa Mixing pump device and fuel cell
US20110045368A1 (en) * 2007-07-26 2011-02-24 Daimler Ag Apparatus for Recirculation of a Cathode Gas in a Fuel Cell Arrangement, Method for Shutting Down Such a Fuel Cell Arrangement
US20110042923A1 (en) * 2009-08-20 2011-02-24 Autoliv Asp, Inc. Inflatable airbag assemblies with alignment apertures
MD363Z5 (ro) * 2010-10-21 2011-11-30 Институт Сельскохозяйственной Техники "Mecagro" Dispozitiv pentru dozarea şi amestecarea lichidelor
US10667622B1 (en) * 2008-07-30 2020-06-02 Youngblood Ip Holdings, Llc Multi-zone temperature modulation system for bed or blanket

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JP4634085B2 (ja) * 2004-07-15 2011-02-16 日本電産サンキョー株式会社 多チャンネルポンプ、燃料電池及びそれらの制御方法
CN101566145B (zh) * 2008-04-24 2012-06-13 研能科技股份有限公司 多流道流体输送装置
KR101279768B1 (ko) * 2010-02-23 2013-07-04 아르테미스 인텔리전트 파워 리미티드 유체 작동 기계의 제어 방법, 유체 작동 기계 및 컴퓨터 판독가능한 저장 매체
CN109578690B (zh) * 2017-09-29 2022-02-11 研能科技股份有限公司 流体系统
TWI653395B (zh) 2017-09-29 2019-03-11 研能科技股份有限公司 流體系統
TWI654374B (zh) 2017-09-29 2019-03-21 研能科技股份有限公司 流體系統
TWI654375B (zh) 2017-09-29 2019-03-21 研能科技股份有限公司 流體系統
TWI653394B (zh) 2017-09-29 2019-03-11 研能科技股份有限公司 流體系統
TWI650483B (zh) * 2017-09-29 2019-02-11 研能科技股份有限公司 流體系統
TWI721241B (zh) 2018-01-22 2021-03-11 研能科技股份有限公司 流體系統
KR102098625B1 (ko) * 2018-06-26 2020-04-08 부산대학교 산학협력단 운전 부하에 따른 연료전지의 연료공급 시스템
KR102011999B1 (ko) * 2019-01-31 2019-08-19 한창기전 주식회사 산화·전처리 장치 일체형 유체이동 시스템을 적용한 총유기탄소 측정 장치

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2502316A (en) * 1948-04-17 1950-03-28 Nathan Mfg Co Pumping mechanism
US3320892A (en) * 1964-10-20 1967-05-23 Allis Chalmers Mfg Co Fuel injection system
US4233002A (en) * 1978-05-09 1980-11-11 Benjamin Birenbaum Fuel injection system
US4255088A (en) * 1979-06-14 1981-03-10 Valleylab, Inc. Liquid pumping system having means for detecting gas in the pump
US5456581A (en) * 1994-08-12 1995-10-10 The United States Of America As Represented By The Secretary Of The Navy Control system for a multi-piston pump with solenoid valves for the production of constant outlet pressure flow
US5477829A (en) * 1994-08-08 1995-12-26 Ford Motor Company Automotive returnless fuel system pressure valve
US6322336B1 (en) * 1999-02-05 2001-11-27 Memminger-Iro Gmbh Lubricating device for a plurality of lubricating stations
US6443717B1 (en) * 1999-10-12 2002-09-03 Jeffrey Lewis Barber Variable timing valves for gas compressors and expanders

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5752667A (en) * 1980-09-17 1982-03-29 Nippon Denso Co Ltd Fuel supply system for engine
JPS5752668A (en) * 1980-09-17 1982-03-29 Nippon Denso Co Ltd Fuel supply system for engine
US5154586A (en) * 1986-03-21 1992-10-13 The Coca-Cola Company Multi-channel linear concentrate pump
JP2568603B2 (ja) * 1988-01-11 1997-01-08 日産自動車株式会社 燃料噴射装置
JPH0422767A (ja) * 1990-05-16 1992-01-27 Aioi Seiki Kk プランジャ型液圧ポンプ
JPH0527293U (ja) * 1991-09-20 1993-04-09 和利 小川 往復動ポンプの接液部構造
JP2514774Y2 (ja) * 1992-09-18 1996-10-23 日東工器株式会社 往復動ポンプ
JPH08127913A (ja) * 1994-11-01 1996-05-21 Teijin Ltd 油剤供給装置
CN2291514Y (zh) * 1996-12-30 1998-09-16 中国科学院空间科学与应用研究中心 多通道、大流量比蠕动泵泵体
JPH1197044A (ja) * 1997-09-17 1999-04-09 Matsushita Electric Works Ltd 燃料電池給湯コジェネレーションシステム
JPH1197045A (ja) * 1997-09-17 1999-04-09 Matsushita Electric Works Ltd 燃料電池給湯コジェネレーションシステム
US20030215957A1 (en) * 1998-02-20 2003-11-20 Tony Lemmo Multi-channel dispensing system
JP3357889B2 (ja) * 1998-12-01 2002-12-16 タニカ電器販売株式会社 酒サーバー
JP3334110B2 (ja) * 2000-12-21 2002-10-15 一誠 生田 流体の吸引吐出装置
JP3748434B2 (ja) * 2002-06-12 2006-02-22 株式会社東芝 直接型メタノール燃料電池システム及び燃料カートリッジ
CN1403630A (zh) * 2002-09-26 2003-03-19 上海交通大学 利用质子交换膜燃料电池实现苯胺合成与电能共生方法
JP4634085B2 (ja) * 2004-07-15 2011-02-16 日本電産サンキョー株式会社 多チャンネルポンプ、燃料電池及びそれらの制御方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2502316A (en) * 1948-04-17 1950-03-28 Nathan Mfg Co Pumping mechanism
US3320892A (en) * 1964-10-20 1967-05-23 Allis Chalmers Mfg Co Fuel injection system
US4233002A (en) * 1978-05-09 1980-11-11 Benjamin Birenbaum Fuel injection system
US4255088A (en) * 1979-06-14 1981-03-10 Valleylab, Inc. Liquid pumping system having means for detecting gas in the pump
US5477829A (en) * 1994-08-08 1995-12-26 Ford Motor Company Automotive returnless fuel system pressure valve
US5456581A (en) * 1994-08-12 1995-10-10 The United States Of America As Represented By The Secretary Of The Navy Control system for a multi-piston pump with solenoid valves for the production of constant outlet pressure flow
US6322336B1 (en) * 1999-02-05 2001-11-27 Memminger-Iro Gmbh Lubricating device for a plurality of lubricating stations
US6443717B1 (en) * 1999-10-12 2002-09-03 Jeffrey Lewis Barber Variable timing valves for gas compressors and expanders

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8163440B2 (en) * 2004-07-15 2012-04-24 Nidec Sankyo Corporation Fuel cell and control method therefor
US20090035629A1 (en) * 2004-07-15 2009-02-05 Nidec Sankyo Corporation Multi-channel pump, fuel cell and control methods therefor
US20090130532A1 (en) * 2006-02-13 2009-05-21 Nidec Sankyo Corporation Mixing Pump Device and Fuel Cell
US20090253019A1 (en) * 2006-05-22 2009-10-08 Mitsuo Yokozawa Mixing pump device and fuel cell
US20090317687A1 (en) * 2006-05-22 2009-12-24 Mitsuo Yokozawa Mixing pump device and fuel cell
US20110045368A1 (en) * 2007-07-26 2011-02-24 Daimler Ag Apparatus for Recirculation of a Cathode Gas in a Fuel Cell Arrangement, Method for Shutting Down Such a Fuel Cell Arrangement
US8691452B2 (en) 2007-07-26 2014-04-08 Daimler Ag Apparatus for recirculation of a cathode gas in a fuel cell arrangement, method for shutting down such a fuel cell arrangement
US10667622B1 (en) * 2008-07-30 2020-06-02 Youngblood Ip Holdings, Llc Multi-zone temperature modulation system for bed or blanket
US10813468B1 (en) * 2008-07-30 2020-10-27 Youngblood Ip Holdings, Llc Multi-zone temperature modulation system for bed or blanket
US10986934B1 (en) * 2008-07-30 2021-04-27 Kryo, Inc. Multi-zone temperature modulation system for bed or blanket
US11147389B1 (en) * 2008-07-30 2021-10-19 Kryo, Inc. Multi-zone temperature modulation system for bed or blanket
US11324330B1 (en) * 2008-07-30 2022-05-10 Sleepme Inc. Multi-zone temperature modulation system for bed or blanket
US11583096B1 (en) * 2008-07-30 2023-02-21 Sleepme Inc. Multi-zone temperature modulation system for bed or blanket
US20110042923A1 (en) * 2009-08-20 2011-02-24 Autoliv Asp, Inc. Inflatable airbag assemblies with alignment apertures
MD363Z5 (ro) * 2010-10-21 2011-11-30 Институт Сельскохозяйственной Техники "Mecagro" Dispozitiv pentru dozarea şi amestecarea lichidelor

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CN100375837C (zh) 2008-03-19
CN101187361B (zh) 2010-06-02
CN1721696A (zh) 2006-01-18
CN101187361A (zh) 2008-05-28
JP4634085B2 (ja) 2011-02-16

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