WO2015005264A1 - Hot water supply system, fuel cell system, and pump device - Google Patents
Hot water supply system, fuel cell system, and pump device Download PDFInfo
- Publication number
- WO2015005264A1 WO2015005264A1 PCT/JP2014/068022 JP2014068022W WO2015005264A1 WO 2015005264 A1 WO2015005264 A1 WO 2015005264A1 JP 2014068022 W JP2014068022 W JP 2014068022W WO 2015005264 A1 WO2015005264 A1 WO 2015005264A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pump chamber
- hot water
- pump
- storage tank
- water storage
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 219
- 239000000446 fuel Substances 0.000 title claims abstract description 54
- 230000007246 mechanism Effects 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000004891 communication Methods 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 8
- 238000010248 power generation Methods 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 17
- 238000011084 recovery Methods 0.000 description 13
- 239000002737 fuel gas Substances 0.000 description 7
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000006200 vaporizer Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000006057 reforming reaction Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04186—Arrangements for control of reactant parameters, e.g. pressure or concentration of liquid-charged or electrolyte-charged reactants
-
- 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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/04—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being hot or corrosive
-
- 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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/04—Pumps having electric drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/0005—Domestic hot-water supply systems using recuperation of waste heat
- F24D17/001—Domestic hot-water supply systems using recuperation of waste heat with accumulation of heated water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
-
- 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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04738—Temperature of auxiliary devices, e.g. reformer, compressor, burner
-
- 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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04776—Pressure; Flow at auxiliary devices, e.g. reformer, compressor, burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
- F24D19/1021—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a by pass valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/19—Fuel cells
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0207—Pumps
-
- 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
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat
-
- 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 pump device applied as, for example, a water circulation pump in a fuel cell system, a hot water supply system including the pump device, and a fuel cell system.
- This type of hot water supply system includes a hot water storage tank that can store water heated by a heat source, and a circulation pump that circulates water in the hot water storage tank between the fuel cell unit and the hot water storage tank.
- the hot water storage tank is connected to a water supply pipe and a hot water discharge pipe.
- tap water corresponding to the amount of hot water is introduced into the hot water storage tank so that the amount of water in the hot water storage tank is constant.
- a centrifugal vortex pump is used as a liquid feed pump (see, for example, Patent Document 1).
- this type of pump is difficult to control the flow rate, it has not been possible to stably maintain the optimal flow rate for heat exchange as required in the hot water supply system.
- a positive displacement pump such as a diaphragm pump is known as a pump capable of controlling the flow rate (see, for example, Patent Document 2).
- diaphragm pumps have low water pressure resistance, and it is difficult to maintain a stable discharge flow rate against fluctuations in input pressure.
- Patent Document 3 discloses a water channel switching device connected between a water pipe and a pressure pump.
- the water channel switching device is configured to operate the pressurization pump when the water pressure from the water pipe is lower than the reference pressure, and to flow water from the water pipe to the pressurization pump by a three-way valve.
- the pressurization pump is stopped, and the water from the water pipe is directly flowed to the discharge pipe of the pressurization pump by the three-way valve.
- Patent Document 3 since it is necessary to drive and control the pressurizing pump and the three-way valve with a motor, there is a problem that the structure and control are complicated, and the cost of the apparatus cannot be avoided.
- JP 2007-120306 A (paragraph [0003]) JP 2001-248560 A JP 2009-52524 A
- a water circulation pump connected between a hot water storage tank and a fuel cell unit is required to have a function of stably circulating a predetermined flow rate of water while receiving water pressure in the hot water storage tank.
- the water pressure in the hot water storage tank can fluctuate greatly in the range of several hundred kPa depending on the amount of water, the water temperature, the water pipe pressure, etc., it is a problem to secure the water pressure resistance against the water pressure fluctuation and to secure a stable discharge flow rate.
- an object of the present invention is to provide a circulation pump capable of ensuring a water pressure resistance characteristic against a water pressure fluctuation in a hot water storage tank and a stable discharge flow rate, a hot water supply system including the circulation pump, and a fuel cell system. There is to do.
- a hot water supply system includes a heat source, a hot water storage tank, and a circulation pump.
- the hot water storage tank is configured to store water heated by the heat source.
- the circulation pump is configured to circulate water in the hot water storage tank between the heat source and the hot water storage tank.
- the circulation pump has a main body, a drive mechanism, and a passage portion.
- the main body is connected to the hot water storage tank and into which water in the hot water storage tank flows, an outlet connected to the heat source, a first pump chamber communicating with the inlet, and a second communicating with the outlet.
- the drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber.
- the drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
- the passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
- a fuel cell system includes a fuel cell unit, a hot water storage tank, and a circulation pump.
- the fuel cell unit generates power using a fuel cell.
- the hot water storage tank is configured to be able to store water that is heated using exhaust heat generated by power generation of the fuel cell unit as a heat source.
- the circulation pump is configured to circulate water in the hot water storage tank between the fuel cell unit and the hot water storage tank.
- the circulation pump has a main body, a drive mechanism, and a passage portion. The main body is connected to the hot water storage tank and communicates with an inlet through which water in the hot water tank flows, an outlet connected to the fuel cell unit, a first pump chamber communicating with the inlet, and the outlet. And a second pump chamber.
- the drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber.
- the drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
- the passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
- a pump device includes a main body, a drive mechanism, and a passage portion.
- the main body has an inlet, an outlet, a first pump chamber, and a second pump chamber. Liquid flows into the inlet. The outlet discharges the liquid flowing into the inlet.
- the first pump chamber communicates with the inlet.
- the second pump chamber communicates with the outlet.
- the drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber. The drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
- the passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
- FIG. 3 is a cross-sectional view taken along line [A]-[A] in FIG. It is sectional drawing which shows the structure of the pump apparatus which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the structure of the pump apparatus which concerns on the 3rd Embodiment of this invention. It is sectional drawing which shows the modification of a structure of the pump apparatus which concerns on the 3rd Embodiment of this invention.
- a hot water supply system includes a heat source, a hot water storage tank, and a circulation pump.
- the hot water storage tank is configured to store water heated by the heat source.
- the circulation pump is configured to circulate water in the hot water storage tank between the heat source and the hot water storage tank.
- the circulation pump has a main body, a drive mechanism, and a passage portion.
- the main body is connected to the hot water storage tank and into which water in the hot water storage tank flows, an outlet connected to the heat source, a first pump chamber communicating with the inlet, and a second communicating with the outlet.
- the drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber.
- the drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
- the passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
- the circulation pump sends out water in the hot water storage tank to the heat source by reciprocating the first and second movable parts in the first and second pump chambers so that the pump operation cycles are opposite to each other. To do.
- the flow rate of water delivered from the circulation pump is typically controlled by the number of reciprocations of both movable parts per unit time.
- the second pump chamber communicates with the first pump chamber via the passage portion, the water pressure in the hot water storage tank introduced into the inlet is simultaneously applied to the first movable portion and the second movable portion.
- the fluctuation in the water pressure is offset by the difference in pressure receiving area between the two movable parts, so that fluctuations in the load on the drive mechanism are suppressed.
- the circulation pump even if the water pressure fluctuation in the hot water storage tank occurs, the fluctuation of the load applied to the drive mechanism can be suppressed, so that a stable discharge flow rate can be maintained, and the circulation pump The power consumption can be reduced. Further, even if an excessive water pressure is input, the stress applied to the drive mechanism can be suppressed, so that the water pressure resistance can be improved.
- the pressure receiving area of the first movable portion in the first pump chamber may be the same as the pressure receiving area of the second movable portion in the second pump chamber.
- the passage portion may have a first check valve.
- the first check valve allows fluid communication in the direction from the first pump chamber to the second pump chamber, and prohibits fluid communication in the opposite direction.
- the main body may further include a second check valve.
- the second check valve is disposed at the inlet and permits liquid communication in the direction from the hot water storage tank to the first pump chamber, and prohibits liquid communication in the opposite direction.
- the first movable part is composed of a first diaphragm that partitions the first pump chamber
- the second movable part is composed of a second diaphragm that partitions the second pump chamber.
- the drive mechanism further includes a shaft-like member having a first end portion fixed to the first diaphragm and a second end portion fixed to the second diaphragm.
- the said circulation pump can be comprised with a diaphragm pump. Further, since each diaphragm is provided at each end of the shaft-like member, the reciprocating movement of each diaphragm can be synchronized.
- the drive mechanism may further include a motor, an eccentric member, and a guide surface.
- the motor has a rotating shaft.
- the eccentric member is connected between the rotating shaft and the shaft-shaped member, and converts the rotational motion of the rotating shaft into the reciprocating motion of the shaft-shaped member.
- the guide surface is formed between the first diaphragm and the second diaphragm, and guides the linear movement of the shaft-shaped member in the axial direction.
- the drive mechanism may further include a biasing member that biases the shaft-shaped member toward one of the first and second pump chambers.
- FIG. 1 is a piping block diagram showing a configuration of a fuel cell system as a hot water supply system according to an embodiment of the present invention.
- the overall configuration of the fuel cell system 100 of the present embodiment will be described.
- the fuel cell system 100 of the present embodiment includes a fuel cell unit 1, a hot water storage tank 2, and a circulation pump 3.
- the fuel cell unit 1 includes a fuel gas supply unit 11, a water vapor supply unit 12, a reformer 13, a fuel cell 14, and an exhaust heat recovery unit 15.
- the fuel gas supply unit 11 supplies fuel gas to the reformer 13.
- the fuel gas supply unit 11 typically includes a blower, a flow control valve, and the like.
- fuel gas hydrocarbon gas, such as natural gas, city gas (methane gas), and propane gas, is used, for example.
- the steam supply unit 12 supplies steam to the reformer 13.
- the water vapor supply unit 12 typically includes a water supply pump, a vaporizer, and the like.
- the vaporizer may include a catalyst heating source (burner) provided in the reformer 13.
- the steam supply unit 12 may be configured to supply steam directly to the reformer 13.
- the reformer 13 has a reforming catalyst, and reacts a fuel gas and a mixed gas of steam supplied from the fuel gas supply unit 11 and the steam supply unit 12 at a predetermined flow rate with the reforming catalyst, respectively.
- the gas is converted (reformed) into hydrogen-rich gas.
- An air supply unit 16 for selective oxidation is connected to the reformer 13, and carbon monoxide (CO) generated in the reforming reaction by the air (oxygen) supplied from the air supply unit 16 is carbon dioxide (CO 2 ) Oxidized to.
- CO carbon monoxide
- the exhaust gas from the reformer burner is introduced into the exhaust heat recovery unit 15 through the gas passage 131.
- the fuel cell 14 generates power using an electrochemical reaction between the hydrogen rich gas (H 2 ) supplied from the reformer 13 and oxygen (O 2 ) supplied from the oxygen supply unit 17.
- the fuel cell 14 typically has a stack structure of fuel cells.
- the fuel battery cell is configured by sandwiching an electrolyte layer between a fuel electrode (negative electrode) to which hydrogen-rich gas is supplied and an air electrode (positive electrode) to which oxygen is supplied.
- the DC power generated by the fuel cell 14 is converted into AC power by the power conversion device 4.
- the power conversion device 4 is typically composed of an inverter. Water (H 2 O) generated in the fuel cell 14 is discharged to a water tank (not shown). The hydrogen-rich gas (off-gas) that has not contributed to the reaction in the fuel cell 14 is supplied to the reformer 13 and used as fuel for a heating source (burner).
- the exhaust heat recovery unit 15 includes a heat exchanger for exchanging heat between the exhaust gas discharged from the reformer 13 and the water in the hot water storage tank 2 circulating through the circulation passage 22. As a result, the water in the hot water storage tank 2 is heated to a predetermined temperature by the exhaust heat recovery unit 15 while circulating through the circulation passage 22. The exhaust gas after heat exchange is discharged to the outside of the fuel cell unit 1. Thus, the water in the hot water storage tank 2 can be heated using the exhaust heat of the fuel cell unit 1 as a heat source.
- the exhaust heat recovery unit 15 is not limited to the above-described configuration, and may be configured such that cooling water for cooling the fuel cell 14 is introduced instead of or in addition to the exhaust gas from the reformer 13. Good. Also with such a configuration, the water in the hot water storage tank 2 can be heated using the exhaust heat of the fuel cell unit 1 as a heat source.
- the hot water storage tank 2 is constituted by a sealed tank having an internal space with a predetermined volume capable of storing hot water for hot water supply.
- a water supply pipe (water pipe) 21, a circulation passage 22 and a hot water discharge pipe 23 are connected to the hot water storage tank 2.
- the water supply pipe 21 is connected to the bottom of the hot water storage tank 2 and is configured to be able to introduce tap water into the internal space of the hot water storage tank 2.
- the circulation passage 22 includes a first water pipe 221 that communicates between the bottom of the hot water storage tank 2 and the suction port (inlet) of the circulation pump 3, a discharge port (outlet) of the circulation pump 3, and the top of the hot water storage tank 2.
- a second water pipe 222 that passes through the exhaust heat recovery unit 15.
- the hot water discharge pipe 23 is connected to the top of the hot water storage tank 2 and supplies hot water in the hot water storage tank 2 to a hot water supply line (not shown).
- the hot water storage tank 2 has a relief valve 24.
- the relief valve 24 is configured to open when the internal pressure of the hot water storage tank 2 exceeds a predetermined pressure (for example, 450 kPa).
- the circulation pump 3 is installed in the circulation passage 22 and configured to circulate water in the hot water storage tank 2 between the hot water storage tank 2 and the exhaust heat recovery unit 15. Details of the configuration of the circulation pump 3 will be described later.
- the fuel cell system 100 of the present embodiment has a controller 5 that controls the operation of the entire system.
- the controller 5 controls the power generation in the fuel cell unit 1, the operation control of the circulation pump 3, and the water supply control to the hot water storage tank 2.
- the hot water control from the hot water storage tank 2 is executed.
- the controller 5 opens and closes the opening / closing valve 231 provided in the hot water discharge pipe 23 in response to an external hot water discharge command, and supplies the hot water in the hot water storage tank 2 to the water supply pipe 21 so that the water level becomes a certain level or higher.
- the provided on-off valve 211 is opened and closed.
- the controller 5 controls the discharge flow rate of the circulation pump 3 to be constant so that the flow rate is optimal for heat exchange in the exhaust heat recovery unit 15.
- the internal pressure of the hot water storage tank 2 largely fluctuates within a predetermined pressure range (for example, a range of 200 kPa to 300 kPa) due to changes in the amount of water in the hot water storage tank 2 and the water pressure (water supply pressure).
- a predetermined pressure range for example, a range of 200 kPa to 300 kPa
- the circulation pump 3 that is driven while constantly receiving the water pressure in the hot water storage tank 2 is required to have durability against water pressure fluctuation and a stable discharge flow rate, and corresponds to the valve opening pressure (450 kPa) of the relief valve 24.
- the water pressure resistance against the pressure is required.
- the circulation pump 3 of the present embodiment is configured by the pump device shown in FIGS.
- the details of the circulation pump 3 will be described.
- [Configuration of pump device] 2 is a cross-sectional view showing a configuration of a pump device 3A applied as the circulation pump 3, and FIG. 3 is a cross-sectional view taken along line [A]-[A] in FIG.
- an X axis, a Y axis, and a Z axis indicate three axial directions orthogonal to each other.
- the pump device 3 ⁇ / b> A includes a main body 30, a drive mechanism 40, and a passage portion 50.
- the main body 30 has an inlet 31 and an outlet 32.
- the inlet 31 is connected to the hot water storage tank 2 (hydraulic pressure source) via the first water pipe 221 so that water in the hot water storage tank 2 can flow in.
- the outlet 31 is connected to the exhaust heat recovery unit 15 (heat source) of the fuel cell unit 1 through the second water conduit 222.
- the main body 30 includes a first main body 301, a second main body 302 fixed to one end of the first main body 301 (the lower end in FIG. 2), and the first main body 301. And a third main body 303 fixed to the end (upper end in FIG. 2).
- the first to third main body portions 301 to 303 are made of a metal material such as an aluminum alloy, and are coupled to each other via a plurality of fasteners B1.
- the inlet 31 is provided in an input port 302 a formed in the second main body 302, and is liquid-tightly connected to the end of the first water conduit 221 through the seal ring S.
- the outlet 32 is provided in an output port 303 a formed in the third main body portion 303, and is liquid-tightly connected to the end portion of the second water pipe 222 through the seal ring S.
- the first and second water pipes 221 and 222 constitute the circulation passage 22 and are fixed to the input port 302a and the output port 303a via retaining members 61 and 62, respectively.
- a check valve V1 is disposed in the output port 303a of the third main body 303.
- the check valve V1 has a function of permitting liquid communication in the direction from the second pump chamber P2 to the outlet 32 but prohibiting liquid communication in the opposite direction. Thereby, the backflow of the circulating water from the exhaust heat recovery part 15 to the pump device 3A is prevented.
- Various check valves can be used as the check valve V1, and a duckbill valve is used in this embodiment.
- the main body 30 further includes a first pump chamber P1 that communicates with the inlet 31 and a second pump chamber P2 that communicates with the outlet 32.
- the first pump chamber P ⁇ b> 1 is formed between the second main body portion 301 and the first diaphragm 41.
- the second pump chamber P ⁇ b> 2 is formed between the third main body portion 303 and the second diaphragm 42.
- the drive mechanism 40 includes a first diaphragm 41 (first movable portion) that faces the first pump chamber P1, and a second diaphragm 42 (second movable portion) that faces the second pump chamber P2. .
- the first and second diaphragms 41 and 42 are each made of an elastic material such as synthetic rubber, and are typically formed in a disk shape.
- the first diaphragm 41 has a peripheral portion sandwiched between the first main body 301 and the second main body 302 in a liquid-tight manner, thereby partitioning the first pump chamber P1.
- the peripheral part is clamped between the 1st main-body part 301 and the 3rd main-body part 303 liquid-tightly, and the 2nd pump chamber P2 is divided.
- the drive mechanism 40 is configured to be able to reciprocate the first and second diaphragms 41 and 42 in the first and second pump chambers P1 and P2, respectively, so that the pump operation cycles are opposite to each other.
- the pump operation cycle is opposite in phase means that when one of the first and second diaphragms 41 and 42 moves in the suction direction, the other diaphragm moves in the discharge direction. To do.
- the drive mechanism 40 includes a shaft-like member 43, a motor M, and an eccentric member 44.
- the shaft-shaped member 43 is formed of a substantially cylindrical metal part having an axial direction in the Z-axis direction, and is disposed in a through hole 46 formed in the first main body 301 along the Z-axis direction.
- the A part of the outer peripheral surface of the shaft-shaped member 43 is configured to be capable of reciprocating in the Z-axis direction while being in sliding contact with the inner wall surface of the through hole 46.
- the shaft-shaped member 43 has a first end 431 fixed to the first diaphragm 41 and a second end 432 fixed to the second diaphragm 42.
- the 1st and 2nd diaphragms 41 and 42 are each fixed to the shaft-shaped member 43 via fastener B2 which penetrates those centers.
- the inside of the through hole 46 in which the shaft-like member 43 is accommodated communicates with the outside air and is at atmospheric pressure.
- the first and second diaphragms 41 and 42 are deformed with the movement of the shaft-like member 43 to change the volumes of the first and second pump chambers P1 and P2. Since the first and second diaphragms 41 and 42 are provided at the two end portions 431 and 432 of the shaft-like member 43, they reciprocate in synchronization with each other.
- a coupling hole 43 a penetrating in the Y-axis direction is provided at the center of the shaft-shaped member 43.
- the cross-sectional shape of the coupling hole 43a viewed from the Y-axis direction is a long hole having a major axis direction in the X-axis direction.
- the motor M is fixed to the first main body 301 via a plurality of fasteners B3, and has a rotation shaft Ms penetrating between the outer peripheral surface of the first main body 301 and the through hole 46.
- the motor M various electric motors can be applied.
- a stepping motor capable of high-speed rotation speed control is used.
- the eccentric member 44 has a shaft portion 44 a coupled to the coupling hole 43 a of the shaft-shaped member 43 and a cylindrical portion 44 b coupled to the rotation shaft Ms, and is connected between the rotation shaft Ms and the shaft-shaped member 43. Is done.
- the shaft portion 44 a of the eccentric member 44 is coupled to the coupling hole 43 a of the shaft-shaped member 43 through the bearing 45.
- the eccentric member 44 converts the rotational motion of the rotational axis Ms around the Y axis into the reciprocating motion of the shaft-shaped member 43 in the Z-axis direction.
- the stroke along the Z-axis direction of the shaft member 43 is determined by the eccentric amount E of the shaft center of the shaft portion 44 a of the eccentric member 44 with respect to the shaft center of the rotation shaft Ms of the motor M.
- the through hole 46 is formed between the first diaphragm 41 and the second diaphragm 42, and a part of the inner wall surface of the through hole 46 is linearly moved in the axial direction (Z-axis direction) of the shaft-like member 43. It functions as a guide surface for guiding. Accordingly, the first and second diaphragms 41 and 42 can be reciprocated in the first and second pump chambers P1 and P2, respectively, so that the pump operation cycles are in opposite phases.
- the pressure receiving area of the first diaphragm 41 in the first pump chamber P1 is configured to be the same as the pressure receiving area of the second diaphragm 42 in the second pump chamber P2.
- the pressure receiving area difference between the two diaphragms 41 and 42 becomes zero, and the adverse effect of the drive mechanism due to fluctuations in water pressure can be eliminated.
- the drive mechanism 40 has a biasing member 47 that biases the shaft-like member 43 to one of the first and second pump chambers P1 and P2.
- the urging member 47 is configured by a coil spring that urges the shaft-like member 43 toward the second pump chamber P ⁇ b> 2, and is formed around the second end portion 432 of the shaft-like member 43. It is mounted between the protruding portion 431 and the step portion 461 of the through hole 46.
- the shaft-like member 43 and the eccentric member 44 can be kept in close contact with each other, so that the stroke of the shaft-like member 43 as designed is equivalent to twice the amount of eccentricity E. Can be secured. Further, even if a gap is generated between the coupling hole 43a and the bearing 45 when assembled, the biasing member 47 can absorb the gap, so that the assembling property between the two is not hindered.
- the passage portion 50 is connected between the first pump chamber P1 and the second pump chamber P2, and enables liquid communication from the first pump chamber P1 to the second pump chamber P2.
- the passage portion 50 includes a piping member 51 and a check valve V2 (first check valve).
- the piping member 51 has a first end portion 511 connected to the first pump chamber P1 and a second end portion 512 connected to the second pump chamber P2.
- the first end 511 is liquid-tightly connected to the output port 302 b formed in the second main body 302 via the seal ring S.
- the second end portion 512 is liquid-tightly connected to the input port 303 b formed in the third main body portion 303 via the seal ring S.
- the first and second end portions 511 and 512 are fixed to the output port 302b and the input port 303b via retaining members 63 and 64, respectively.
- the check valve V2 is arranged inside the input port 303b of the third main body 303.
- Various check valves can be used as the check valve V2, and a duckbill valve is used in this embodiment.
- the check valve V2 has a function of permitting liquid communication in the direction from the first pump chamber P1 to the second pump chamber P2, but prohibiting liquid communication in the opposite direction. Accordingly, the pressurized water in the second pump chamber P2 can be stably sent to the outlet 32 side without flowing back to the first pump chamber P1, so that the operation efficiency of the pump device 3A can be increased.
- the drive mechanism 40 reciprocates the first and second diaphragms 41 and 42 in the first and second pump chambers P1 and P2, respectively, such that the pump operation cycles are in opposite phases.
- the volumes of the first and second pump chambers P1, P2 change periodically, and the circulating water introduced into the inlet 31 is alternately pressurized in the first pump chamber P1 and the second pump chamber P2. Then, it is sent out from the outlet 32 to the exhaust heat recovery unit 15 at a predetermined flow rate.
- the flow rate of water delivered from the pump device 3A is typically controlled by the number of reciprocations of both the diaphragms 41 and 42 per unit time. Specifically, the discharge flow rate of the pump device 3A is controlled by controlling the rotation speed of the rotation shaft Ms of the motor M. The drive of the motor M is controlled by the controller 5. The controller 5 controls the driving of the motor M so that the flow rate is optimal for heat exchange in the exhaust heat recovery unit 15.
- the shaft-like member 43 is configured to move linearly in the Z-axis direction along the inner wall surface (guide surface) of the through hole 46, the first and second diaphragms 41, 42 receives only the stress along the Z-axis direction and deforms linearly. For this reason, since the deformation
- the second pump chamber P2 communicates with the first pump chamber P1 through the passage portion 50.
- the water pressure in the hot water storage tank 2 introduced into the inlet 31 acts on the first diaphragm 41 and the second diaphragm 42 simultaneously.
- the pressure acting on the first diaphragm 41 pressurizes the shaft-like member 43 toward the second pump chamber P2, and the pressure acting on the second diaphragm 42 forces the shaft-like member 43 in the first pump chamber P1. Pressurize toward
- the drive mechanism 40 can drive the pump device 3A with a substantially constant load regardless of the presence or absence of water pressure fluctuation.
- the fluctuation of the load applied to the drive mechanism 40 can be suppressed, so that a stable discharge flow rate can be maintained and the consumption of the pump device 3A can be maintained. Electric power can also be reduced.
- FIG. 4 is a cross-sectional view showing a configuration of a pump device according to the second embodiment of the present invention.
- configurations different from those of the first embodiment will be mainly described, and configurations similar to those of the above-described embodiment will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
- the pump device 3B of the present embodiment is applicable as the circulation pump 3 in the fuel cell system 100.
- the pump device 3 ⁇ / b> B includes a main body 30, a drive mechanism 40, and a passage portion 50.
- This embodiment is different from the above-described first embodiment in that the shaft-like member 43 ′ that supports the first and second diaphragms 41 and 42 has a two-part structure. That is, the shaft-like member 43 ′ has first and second shaft-like portions M1, M2 that are divided in the axial direction.
- the first shaft portion M1 is fixed to the first diaphragm 41, and the second shaft portion M2 is fixed to the second diaphragm 42.
- a coupling hole 43a coupled to the eccentric member 44 via the bearing 45 is provided in the second shaft portion 43B.
- the first shaft portion M1 and the second shaft portion M2 are in contact with each other on the contact surface 430.
- the first shaft portion M1 and the second shaft portion M2 reciprocate within the main body 30 integrally with each other. Therefore, also in this embodiment, it is possible to obtain the same function and effect as those of the first embodiment.
- FIG. 5 is a cross-sectional view showing a configuration of a pump device according to the third embodiment of the present invention.
- configurations different from those of the first embodiment will be mainly described, and configurations similar to those of the above-described embodiment will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
- the pump device 3C according to the present embodiment is applicable as the circulation pump 3 in the fuel cell system 100.
- This embodiment differs from the first embodiment described above in that a check valve V3 (second check valve) is disposed at the inlet 31 of the main body 30.
- the check valve V3 allows liquid communication in the direction from the inlet 31 (hot water storage tank 2) to the first pump chamber P1, but has a function of prohibiting liquid communication in the opposite direction.
- Various check valves can be used as the check valve V2, and a duckbill valve is used in this embodiment.
- the same operational effects as those of the first embodiment described above can be obtained.
- the check valve V3 is disposed at the inlet 31, the pressurized water in the first pump chamber P1 does not flow back to the inlet 31 side, but to the second pump chamber P2 and outlet 32 side. It can be sent out stably. Thereby, since the pump water in each pump chamber P1, P2 can be discharged efficiently, a flow volume is stabilized and the operating efficiency of a pump apparatus can also be improved.
- the fuel cell system has been described as an example of the hot water supply system.
- the hot water supply system is heated by a heat source in a hot water supply system using another power generation mechanism such as a heat pump, a solar battery, or a gas engine.
- the present invention is applicable as long as a hot water storage tank capable of storing water is provided.
- the pump devices 3A to 3C constituting the circulation pump 3 are constituted by diaphragm pumps.
- a plunger pump may be constituted.
- the check valve V3 is arranged on the inlet side of the pump.
- the check valve V4 as shown in FIG. You may arrange
- the check valve V4 has a function of permitting liquid communication in the direction from the first pump chamber P1 to the second pump chamber P2, but prohibiting liquid communication in the opposite direction. Even with such a configuration, the same operational effects as those of the third embodiment described above can be obtained.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel Cell (AREA)
- Reciprocating Pumps (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
[Problem] To ensure the characteristic of water pressure resistance against water pressure fluctuation in a hot water storage tank and a stable discharge flow rate.
[Solution] A fuel cell system (100) according to an embodiment of the present invention is provided with a circulation pump (3) for circulating water in a hot water storage tank (2) between a fuel cell unit (1) and the hot water storage tank (2). The circulation pump (3) comprises a main body (30), a drive mechanism (40), and a passage part (50). The main body (30) has an inlet (31) connected to the hot water storage tank, an outlet (32) connected to the fuel cell unit, a first pump chamber (P1) communicating with the inlet (31), and a second pump chamber (P2) communicating with the outlet (32). The drive mechanism (40) has a first diaphragm (41) and a second diaphragm (42), and reciprocates the first and second diaphragms in the first and second pump chambers, respectively, such that pump operating cycles have opposite phases to each other. The passage part (50) is connected between the first pump chamber and the second pump chamber and enables liquid to flow from the first pump chamber to the second pump chamber.
Description
本発明は、例えば燃料電池システムにおける水循環ポンプとして適用されるポンプ装置及びこれを備えた給湯システム及び燃料電池システムに関する。
The present invention relates to a pump device applied as, for example, a water circulation pump in a fuel cell system, a hot water supply system including the pump device, and a fuel cell system.
近年、例えば燃料電池システムの発電で発生した排熱を熱源として利用した給湯システムの開発が進められている。この種の給湯システムは、熱源で加温される水を貯留可能な貯湯タンクと、貯湯タンク内の水を燃料電池ユニットと貯湯タンクとの間で循環させる循環ポンプとを備える。貯湯タンクには、給水管と出湯管とが接続されており、典型的には、貯湯タンク内の水量が一定となるように、出湯量に応じた量の水道水が貯湯タンクに導入されるように構成される。
In recent years, for example, a hot water supply system that uses exhaust heat generated by power generation of a fuel cell system as a heat source has been developed. This type of hot water supply system includes a hot water storage tank that can store water heated by a heat source, and a circulation pump that circulates water in the hot water storage tank between the fuel cell unit and the hot water storage tank. The hot water storage tank is connected to a water supply pipe and a hot water discharge pipe. Typically, tap water corresponding to the amount of hot water is introduced into the hot water storage tank so that the amount of water in the hot water storage tank is constant. Configured as follows.
一般に、送液ポンプとして例えば遠心渦巻き式ポンプが用いられている(例えば特許文献1参照)。ところが、この種のポンプは流量制御が困難であるため、上記給湯システムにおいて要求されるような熱交換に最適な流量を安定して維持することができなかった。
Generally, for example, a centrifugal vortex pump is used as a liquid feed pump (see, for example, Patent Document 1). However, since this type of pump is difficult to control the flow rate, it has not been possible to stably maintain the optimal flow rate for heat exchange as required in the hot water supply system.
一方、流量制御が可能なポンプとしてダイヤフラムポンプ等の容積移送式ポンプが知られている(例えば特許文献2参照)。しかしながら、一般にダイヤフラムポンプは耐水圧が低く、さらに入力圧の変動に対して安定した吐出流量を維持することが困難であるという問題がある。
On the other hand, a positive displacement pump such as a diaphragm pump is known as a pump capable of controlling the flow rate (see, for example, Patent Document 2). However, in general, diaphragm pumps have low water pressure resistance, and it is difficult to maintain a stable discharge flow rate against fluctuations in input pressure.
また特許文献3には、水道管と加圧ポンプとの間に接続された水路切替え装置について開示されている。当該水路切替え装置は、水道管からの水圧が基準圧力よりも低いときは加圧ポンプを動作させるとともに、三方弁によって水道管からの水を加圧ポンプに流すように構成される。一方、水道管からの水圧が基準圧力よりも高いときは加圧ポンプを停止させるとともに、三方弁によって水道管からの水を直接、加圧ポンプの吐出管に流すように構成されている。特許文献3に記載の構成では、加圧ポンプと三方弁とをそれぞれモータで駆動制御する必要があるため、構造及び制御が複雑化し、装置コストの上昇が避けられないという問題がある。
Patent Document 3 discloses a water channel switching device connected between a water pipe and a pressure pump. The water channel switching device is configured to operate the pressurization pump when the water pressure from the water pipe is lower than the reference pressure, and to flow water from the water pipe to the pressurization pump by a three-way valve. On the other hand, when the water pressure from the water pipe is higher than the reference pressure, the pressurization pump is stopped, and the water from the water pipe is directly flowed to the discharge pipe of the pressurization pump by the three-way valve. In the configuration described in Patent Document 3, since it is necessary to drive and control the pressurizing pump and the three-way valve with a motor, there is a problem that the structure and control are complicated, and the cost of the apparatus cannot be avoided.
燃料電池システムにおいて、貯湯タンクと燃料電池ユニットとの間に接続される水循環ポンプには、貯湯タンク内の水圧を受けた状態で所定流量の水を安定して循環させる機能を有することが要求される。ところが貯湯タンク内の水圧は、水量や水温、水道管の水道圧等によって数百kPaの範囲で大きく変動し得るため、当該水圧変動に対する耐水圧特性と安定した吐出流量の確保が問題となる。
In a fuel cell system, a water circulation pump connected between a hot water storage tank and a fuel cell unit is required to have a function of stably circulating a predetermined flow rate of water while receiving water pressure in the hot water storage tank. The However, since the water pressure in the hot water storage tank can fluctuate greatly in the range of several hundred kPa depending on the amount of water, the water temperature, the water pipe pressure, etc., it is a problem to secure the water pressure resistance against the water pressure fluctuation and to secure a stable discharge flow rate.
以上のような事情に鑑み、本発明の目的は、貯湯タンク内の水圧変動に対する耐水圧特性と安定した吐出流量を確保することができる循環ポンプ及びこれを備えた給湯システム及び燃料電池システムを提供することにある。
In view of the circumstances as described above, an object of the present invention is to provide a circulation pump capable of ensuring a water pressure resistance characteristic against a water pressure fluctuation in a hot water storage tank and a stable discharge flow rate, a hot water supply system including the circulation pump, and a fuel cell system. There is to do.
上記目的を達成するため、本発明の一形態に係る給湯システムは、熱源と、貯湯タンクと、循環ポンプとを具備する。
上記貯湯タンクは、上記熱源で加温される水を貯留可能に構成される。
上記循環ポンプは、上記貯湯タンク内の水を上記熱源と上記貯湯タンクとの間で循環させることが可能に構成される。
上記循環ポンプは、本体と、駆動機構と、通路部とを有する。
上記本体は、上記貯湯タンクに接続され上記貯湯タンク内の水が流入する入口と、上記熱源に接続される出口と、上記入口と連通する第1のポンプ室と、上記出口と連通する第2のポンプ室とを有する。
上記駆動機構は、上記第1のポンプ室に臨む第1の可動部と、上記第2のポンプ室に臨む第2の可動部とを有する。上記駆動機構は、上記第1及び第2の可動部をそれぞれ上記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能に構成される。
上記通路部は、上記第1のポンプ室と上記第2のポンプ室との間に接続され、上記第1のポンプ室から上記第2のポンプ室への液連通を可能とする。 In order to achieve the above object, a hot water supply system according to one embodiment of the present invention includes a heat source, a hot water storage tank, and a circulation pump.
The hot water storage tank is configured to store water heated by the heat source.
The circulation pump is configured to circulate water in the hot water storage tank between the heat source and the hot water storage tank.
The circulation pump has a main body, a drive mechanism, and a passage portion.
The main body is connected to the hot water storage tank and into which water in the hot water storage tank flows, an outlet connected to the heat source, a first pump chamber communicating with the inlet, and a second communicating with the outlet. And a pump chamber.
The drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber. The drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
The passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
上記貯湯タンクは、上記熱源で加温される水を貯留可能に構成される。
上記循環ポンプは、上記貯湯タンク内の水を上記熱源と上記貯湯タンクとの間で循環させることが可能に構成される。
上記循環ポンプは、本体と、駆動機構と、通路部とを有する。
上記本体は、上記貯湯タンクに接続され上記貯湯タンク内の水が流入する入口と、上記熱源に接続される出口と、上記入口と連通する第1のポンプ室と、上記出口と連通する第2のポンプ室とを有する。
上記駆動機構は、上記第1のポンプ室に臨む第1の可動部と、上記第2のポンプ室に臨む第2の可動部とを有する。上記駆動機構は、上記第1及び第2の可動部をそれぞれ上記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能に構成される。
上記通路部は、上記第1のポンプ室と上記第2のポンプ室との間に接続され、上記第1のポンプ室から上記第2のポンプ室への液連通を可能とする。 In order to achieve the above object, a hot water supply system according to one embodiment of the present invention includes a heat source, a hot water storage tank, and a circulation pump.
The hot water storage tank is configured to store water heated by the heat source.
The circulation pump is configured to circulate water in the hot water storage tank between the heat source and the hot water storage tank.
The circulation pump has a main body, a drive mechanism, and a passage portion.
The main body is connected to the hot water storage tank and into which water in the hot water storage tank flows, an outlet connected to the heat source, a first pump chamber communicating with the inlet, and a second communicating with the outlet. And a pump chamber.
The drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber. The drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
The passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
本発明の一形態に係る燃料電池システムは、燃料電池ユニットと、貯湯タンクと、循環ポンプとを具備する。
上記燃料電池ユニットは、燃料電池により発電する。
上記貯湯タンクは、上記燃料電池ユニットの発電で発生した排熱を熱源として加温される水を貯留可能に構成される。
上記循環ポンプは、上記貯湯タンク内の水を上記燃料電池ユニットと上記貯湯タンクとの間で循環させることが可能に構成される。
上記循環ポンプは、本体と、駆動機構と、通路部とを有する。
上記本体は、上記貯湯タンクに接続され上記貯湯タンク内の水が流入する入口と、上記燃料電池ユニットに接続される出口と、上記入口と連通する第1のポンプ室と、上記出口と連通する第2のポンプ室とを有する。
上記駆動機構は、上記第1のポンプ室に臨む第1の可動部と、上記第2のポンプ室に臨む第2の可動部とを有する。上記駆動機構は、上記第1及び第2の可動部をそれぞれ上記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能に構成される。
上記通路部は、上記第1のポンプ室と上記第2のポンプ室との間に接続され、上記第1のポンプ室から上記第2のポンプ室への液連通を可能とする。 A fuel cell system according to an aspect of the present invention includes a fuel cell unit, a hot water storage tank, and a circulation pump.
The fuel cell unit generates power using a fuel cell.
The hot water storage tank is configured to be able to store water that is heated using exhaust heat generated by power generation of the fuel cell unit as a heat source.
The circulation pump is configured to circulate water in the hot water storage tank between the fuel cell unit and the hot water storage tank.
The circulation pump has a main body, a drive mechanism, and a passage portion.
The main body is connected to the hot water storage tank and communicates with an inlet through which water in the hot water tank flows, an outlet connected to the fuel cell unit, a first pump chamber communicating with the inlet, and the outlet. And a second pump chamber.
The drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber. The drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
The passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
上記燃料電池ユニットは、燃料電池により発電する。
上記貯湯タンクは、上記燃料電池ユニットの発電で発生した排熱を熱源として加温される水を貯留可能に構成される。
上記循環ポンプは、上記貯湯タンク内の水を上記燃料電池ユニットと上記貯湯タンクとの間で循環させることが可能に構成される。
上記循環ポンプは、本体と、駆動機構と、通路部とを有する。
上記本体は、上記貯湯タンクに接続され上記貯湯タンク内の水が流入する入口と、上記燃料電池ユニットに接続される出口と、上記入口と連通する第1のポンプ室と、上記出口と連通する第2のポンプ室とを有する。
上記駆動機構は、上記第1のポンプ室に臨む第1の可動部と、上記第2のポンプ室に臨む第2の可動部とを有する。上記駆動機構は、上記第1及び第2の可動部をそれぞれ上記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能に構成される。
上記通路部は、上記第1のポンプ室と上記第2のポンプ室との間に接続され、上記第1のポンプ室から上記第2のポンプ室への液連通を可能とする。 A fuel cell system according to an aspect of the present invention includes a fuel cell unit, a hot water storage tank, and a circulation pump.
The fuel cell unit generates power using a fuel cell.
The hot water storage tank is configured to be able to store water that is heated using exhaust heat generated by power generation of the fuel cell unit as a heat source.
The circulation pump is configured to circulate water in the hot water storage tank between the fuel cell unit and the hot water storage tank.
The circulation pump has a main body, a drive mechanism, and a passage portion.
The main body is connected to the hot water storage tank and communicates with an inlet through which water in the hot water tank flows, an outlet connected to the fuel cell unit, a first pump chamber communicating with the inlet, and the outlet. And a second pump chamber.
The drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber. The drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
The passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
本発明の一形態に係るポンプ装置は、本体と、駆動機構と、通路部とを具備する。
上記本体は、入口と、出口と、第1のポンプ室と、第2のポンプ室とを有する。上記入口には、液体が流入する。上記出口は、上記入口に流入した液体を吐出する。上記第1のポンプ室は、上記入口と連通する。上記第2のポンプ室は、上記出口と連通する。
上記駆動機構は、上記第1のポンプ室に臨む第1の可動部と、上記第2のポンプ室に臨む第2の可動部とを有する。上記駆動機構は、上記第1及び第2の可動部をそれぞれ上記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能に構成される。
上記通路部は、上記第1のポンプ室と上記第2のポンプ室との間に接続され、上記第1のポンプ室から上記第2のポンプ室への液連通を可能とする。 A pump device according to an embodiment of the present invention includes a main body, a drive mechanism, and a passage portion.
The main body has an inlet, an outlet, a first pump chamber, and a second pump chamber. Liquid flows into the inlet. The outlet discharges the liquid flowing into the inlet. The first pump chamber communicates with the inlet. The second pump chamber communicates with the outlet.
The drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber. The drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
The passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
上記本体は、入口と、出口と、第1のポンプ室と、第2のポンプ室とを有する。上記入口には、液体が流入する。上記出口は、上記入口に流入した液体を吐出する。上記第1のポンプ室は、上記入口と連通する。上記第2のポンプ室は、上記出口と連通する。
上記駆動機構は、上記第1のポンプ室に臨む第1の可動部と、上記第2のポンプ室に臨む第2の可動部とを有する。上記駆動機構は、上記第1及び第2の可動部をそれぞれ上記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能に構成される。
上記通路部は、上記第1のポンプ室と上記第2のポンプ室との間に接続され、上記第1のポンプ室から上記第2のポンプ室への液連通を可能とする。 A pump device according to an embodiment of the present invention includes a main body, a drive mechanism, and a passage portion.
The main body has an inlet, an outlet, a first pump chamber, and a second pump chamber. Liquid flows into the inlet. The outlet discharges the liquid flowing into the inlet. The first pump chamber communicates with the inlet. The second pump chamber communicates with the outlet.
The drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber. The drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
The passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
本発明の一実施形態に係る給湯システムは、熱源と、貯湯タンクと、循環ポンプとを具備する。
上記貯湯タンクは、上記熱源で加温される水を貯留可能に構成される。
上記循環ポンプは、上記貯湯タンク内の水を上記熱源と上記貯湯タンクとの間で循環させることが可能に構成される。
上記循環ポンプは、本体と、駆動機構と、通路部とを有する。
上記本体は、上記貯湯タンクに接続され上記貯湯タンク内の水が流入する入口と、上記熱源に接続される出口と、上記入口と連通する第1のポンプ室と、上記出口と連通する第2のポンプ室とを有する。
上記駆動機構は、上記第1のポンプ室に臨む第1の可動部と、上記第2のポンプ室に臨む第2の可動部とを有する。上記駆動機構は、上記第1及び第2の可動部をそれぞれ上記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能に構成される。
上記通路部は、上記第1のポンプ室と上記第2のポンプ室との間に接続され、上記第1のポンプ室から上記第2のポンプ室への液連通を可能とする。 A hot water supply system according to an embodiment of the present invention includes a heat source, a hot water storage tank, and a circulation pump.
The hot water storage tank is configured to store water heated by the heat source.
The circulation pump is configured to circulate water in the hot water storage tank between the heat source and the hot water storage tank.
The circulation pump has a main body, a drive mechanism, and a passage portion.
The main body is connected to the hot water storage tank and into which water in the hot water storage tank flows, an outlet connected to the heat source, a first pump chamber communicating with the inlet, and a second communicating with the outlet. And a pump chamber.
The drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber. The drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
The passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
上記貯湯タンクは、上記熱源で加温される水を貯留可能に構成される。
上記循環ポンプは、上記貯湯タンク内の水を上記熱源と上記貯湯タンクとの間で循環させることが可能に構成される。
上記循環ポンプは、本体と、駆動機構と、通路部とを有する。
上記本体は、上記貯湯タンクに接続され上記貯湯タンク内の水が流入する入口と、上記熱源に接続される出口と、上記入口と連通する第1のポンプ室と、上記出口と連通する第2のポンプ室とを有する。
上記駆動機構は、上記第1のポンプ室に臨む第1の可動部と、上記第2のポンプ室に臨む第2の可動部とを有する。上記駆動機構は、上記第1及び第2の可動部をそれぞれ上記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能に構成される。
上記通路部は、上記第1のポンプ室と上記第2のポンプ室との間に接続され、上記第1のポンプ室から上記第2のポンプ室への液連通を可能とする。 A hot water supply system according to an embodiment of the present invention includes a heat source, a hot water storage tank, and a circulation pump.
The hot water storage tank is configured to store water heated by the heat source.
The circulation pump is configured to circulate water in the hot water storage tank between the heat source and the hot water storage tank.
The circulation pump has a main body, a drive mechanism, and a passage portion.
The main body is connected to the hot water storage tank and into which water in the hot water storage tank flows, an outlet connected to the heat source, a first pump chamber communicating with the inlet, and a second communicating with the outlet. And a pump chamber.
The drive mechanism includes a first movable part that faces the first pump chamber and a second movable part that faces the second pump chamber. The drive mechanism is configured to be able to reciprocate the first and second movable parts in the first and second pump chambers so that the pump operation cycles are in opposite phases.
The passage portion is connected between the first pump chamber and the second pump chamber, and enables fluid communication from the first pump chamber to the second pump chamber.
上記循環ポンプは、第1及び第2の可動部をそれぞれ第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることで、貯湯タンク内の水を熱源へ送出する。循環ポンプから送出される水の流量は、典型的には、単位時間当たりの両可動部の往復回数で制御される。
一方、第2のポンプ室は通路部を介して第1のポンプ室と連通しているため、入口に導入された貯湯タンク内の水圧は、第1の可動部及び第2の可動部に同時に作用する。したがって貯湯タンク内の水圧が大きく変動したとしても、両可動部間の受圧面積差で水圧変動分が相殺されるため、駆動機構の負荷の変動が抑制される。
以上のように上記循環ポンプによれば、貯湯タンク内の水圧変動が生じたとしても駆動機構に加わる負荷の変動を抑えることができるため、安定した吐出流量を維持することができるとともに、循環ポンプの消費電力も低減することができる。また過大な水圧が入力されたとしても駆動機構に加わるストレスを抑えることができるため、耐水圧特性を高めることができる。 The circulation pump sends out water in the hot water storage tank to the heat source by reciprocating the first and second movable parts in the first and second pump chambers so that the pump operation cycles are opposite to each other. To do. The flow rate of water delivered from the circulation pump is typically controlled by the number of reciprocations of both movable parts per unit time.
On the other hand, since the second pump chamber communicates with the first pump chamber via the passage portion, the water pressure in the hot water storage tank introduced into the inlet is simultaneously applied to the first movable portion and the second movable portion. Works. Therefore, even if the water pressure in the hot water storage tank greatly fluctuates, the fluctuation in the water pressure is offset by the difference in pressure receiving area between the two movable parts, so that fluctuations in the load on the drive mechanism are suppressed.
As described above, according to the above circulation pump, even if the water pressure fluctuation in the hot water storage tank occurs, the fluctuation of the load applied to the drive mechanism can be suppressed, so that a stable discharge flow rate can be maintained, and the circulation pump The power consumption can be reduced. Further, even if an excessive water pressure is input, the stress applied to the drive mechanism can be suppressed, so that the water pressure resistance can be improved.
一方、第2のポンプ室は通路部を介して第1のポンプ室と連通しているため、入口に導入された貯湯タンク内の水圧は、第1の可動部及び第2の可動部に同時に作用する。したがって貯湯タンク内の水圧が大きく変動したとしても、両可動部間の受圧面積差で水圧変動分が相殺されるため、駆動機構の負荷の変動が抑制される。
以上のように上記循環ポンプによれば、貯湯タンク内の水圧変動が生じたとしても駆動機構に加わる負荷の変動を抑えることができるため、安定した吐出流量を維持することができるとともに、循環ポンプの消費電力も低減することができる。また過大な水圧が入力されたとしても駆動機構に加わるストレスを抑えることができるため、耐水圧特性を高めることができる。 The circulation pump sends out water in the hot water storage tank to the heat source by reciprocating the first and second movable parts in the first and second pump chambers so that the pump operation cycles are opposite to each other. To do. The flow rate of water delivered from the circulation pump is typically controlled by the number of reciprocations of both movable parts per unit time.
On the other hand, since the second pump chamber communicates with the first pump chamber via the passage portion, the water pressure in the hot water storage tank introduced into the inlet is simultaneously applied to the first movable portion and the second movable portion. Works. Therefore, even if the water pressure in the hot water storage tank greatly fluctuates, the fluctuation in the water pressure is offset by the difference in pressure receiving area between the two movable parts, so that fluctuations in the load on the drive mechanism are suppressed.
As described above, according to the above circulation pump, even if the water pressure fluctuation in the hot water storage tank occurs, the fluctuation of the load applied to the drive mechanism can be suppressed, so that a stable discharge flow rate can be maintained, and the circulation pump The power consumption can be reduced. Further, even if an excessive water pressure is input, the stress applied to the drive mechanism can be suppressed, so that the water pressure resistance can be improved.
上記第1のポンプ室内における上記第1の可動部の受圧面積は、上記第2のポンプ室内における上記第2の可動部の受圧面積と同一であってもよい。
両可動部間での受圧面積差をゼロとすることで、水圧変動で駆動機構が被る悪影響をさらに排除することができる。これにより水圧変動の有無に関係なく安定した吐出流量を維持することができる。 The pressure receiving area of the first movable portion in the first pump chamber may be the same as the pressure receiving area of the second movable portion in the second pump chamber.
By setting the pressure receiving area difference between the two movable parts to zero, it is possible to further eliminate the adverse effect that the driving mechanism suffers from fluctuations in water pressure. Thereby, it is possible to maintain a stable discharge flow rate regardless of the presence or absence of water pressure fluctuation.
両可動部間での受圧面積差をゼロとすることで、水圧変動で駆動機構が被る悪影響をさらに排除することができる。これにより水圧変動の有無に関係なく安定した吐出流量を維持することができる。 The pressure receiving area of the first movable portion in the first pump chamber may be the same as the pressure receiving area of the second movable portion in the second pump chamber.
By setting the pressure receiving area difference between the two movable parts to zero, it is possible to further eliminate the adverse effect that the driving mechanism suffers from fluctuations in water pressure. Thereby, it is possible to maintain a stable discharge flow rate regardless of the presence or absence of water pressure fluctuation.
上記通路部は、第1の逆止弁を有してもよい。上記第1の逆止弁は、上記第1のポンプ室から上記第2のポンプ室への方向の液連通を許容し、それとは逆方向への液連通を禁止する。
上記構成によれば、第2のポンプ室における加圧水を第1のポンプ室側へ逆流させることなく出口側へ安定して送出することができるので、循環ポンプの運転効率を高めることができる。 The passage portion may have a first check valve. The first check valve allows fluid communication in the direction from the first pump chamber to the second pump chamber, and prohibits fluid communication in the opposite direction.
According to the said structure, since the pressurized water in a 2nd pump chamber can be stably sent to an exit side, without making it flow backward to the 1st pump chamber side, the operating efficiency of a circulation pump can be improved.
上記構成によれば、第2のポンプ室における加圧水を第1のポンプ室側へ逆流させることなく出口側へ安定して送出することができるので、循環ポンプの運転効率を高めることができる。 The passage portion may have a first check valve. The first check valve allows fluid communication in the direction from the first pump chamber to the second pump chamber, and prohibits fluid communication in the opposite direction.
According to the said structure, since the pressurized water in a 2nd pump chamber can be stably sent to an exit side, without making it flow backward to the 1st pump chamber side, the operating efficiency of a circulation pump can be improved.
上記本体は、第2の逆止弁をさらに有してもよい。上記第2の逆止弁は、上記入口に配置され、上記貯湯タンクから上記第1のポンプ室への方向の液連通を許容し、それとは逆方向への液連通を禁止する。
上記構成によれば、第1のポンプ室における加圧水を入口側へ逆流させることなく第2のポンプ室及び出口側へ安定して送出することができるので、循環ポンプの運転効率を高めることができる。 The main body may further include a second check valve. The second check valve is disposed at the inlet and permits liquid communication in the direction from the hot water storage tank to the first pump chamber, and prohibits liquid communication in the opposite direction.
According to the above configuration, since the pressurized water in the first pump chamber can be stably sent to the second pump chamber and the outlet side without flowing back to the inlet side, the operation efficiency of the circulation pump can be improved. .
上記構成によれば、第1のポンプ室における加圧水を入口側へ逆流させることなく第2のポンプ室及び出口側へ安定して送出することができるので、循環ポンプの運転効率を高めることができる。 The main body may further include a second check valve. The second check valve is disposed at the inlet and permits liquid communication in the direction from the hot water storage tank to the first pump chamber, and prohibits liquid communication in the opposite direction.
According to the above configuration, since the pressurized water in the first pump chamber can be stably sent to the second pump chamber and the outlet side without flowing back to the inlet side, the operation efficiency of the circulation pump can be improved. .
上記第1の可動部は、上記第1のポンプ室を区画する第1のダイヤフラムで構成され、上記第2の可動部は、上記第2のポンプ室を区画する第2のダイヤフラムで構成されてもよい。この場合、上記駆動機構は、上記第1のダイヤフラムに固定される第1の端部と、上記第2のダイヤフラムに固定される第2の端部とを有する軸状部材をさらに有する。
上記構成によれば、当該循環ポンプをダイヤフラムポンプで構成することができる。また、各ダイヤフラムが軸状部材の各端部に設けられているため、各ダイヤフラムの往復移動を同期させることができる。 The first movable part is composed of a first diaphragm that partitions the first pump chamber, and the second movable part is composed of a second diaphragm that partitions the second pump chamber. Also good. In this case, the drive mechanism further includes a shaft-like member having a first end portion fixed to the first diaphragm and a second end portion fixed to the second diaphragm.
According to the said structure, the said circulation pump can be comprised with a diaphragm pump. Further, since each diaphragm is provided at each end of the shaft-like member, the reciprocating movement of each diaphragm can be synchronized.
上記構成によれば、当該循環ポンプをダイヤフラムポンプで構成することができる。また、各ダイヤフラムが軸状部材の各端部に設けられているため、各ダイヤフラムの往復移動を同期させることができる。 The first movable part is composed of a first diaphragm that partitions the first pump chamber, and the second movable part is composed of a second diaphragm that partitions the second pump chamber. Also good. In this case, the drive mechanism further includes a shaft-like member having a first end portion fixed to the first diaphragm and a second end portion fixed to the second diaphragm.
According to the said structure, the said circulation pump can be comprised with a diaphragm pump. Further, since each diaphragm is provided at each end of the shaft-like member, the reciprocating movement of each diaphragm can be synchronized.
上記構成において、上記駆動機構は、モータと、偏心部材と、ガイド面とをさらに有してもよい。
上記モータは、回転軸を有する。上記偏心部材は、上記回転軸と上記軸状部材との間に接続され、上記回転軸の回転運動を上記軸状部材の往復運動に変換する。上記ガイド面は、上記第1のダイヤフラムと上記第2のダイヤフラムとの間に形成され、上記軸状部材のその軸方向への直線移動を案内する。
これにより軸状部材のその軸方向に沿った直線移動が確保されるため、ダイヤフラムの劣化を抑制することができるとともに、循環ポンプの耐久性を高めることができる。 In the above configuration, the drive mechanism may further include a motor, an eccentric member, and a guide surface.
The motor has a rotating shaft. The eccentric member is connected between the rotating shaft and the shaft-shaped member, and converts the rotational motion of the rotating shaft into the reciprocating motion of the shaft-shaped member. The guide surface is formed between the first diaphragm and the second diaphragm, and guides the linear movement of the shaft-shaped member in the axial direction.
As a result, the linear movement of the shaft-shaped member along the axial direction is ensured, so that the deterioration of the diaphragm can be suppressed and the durability of the circulation pump can be enhanced.
上記モータは、回転軸を有する。上記偏心部材は、上記回転軸と上記軸状部材との間に接続され、上記回転軸の回転運動を上記軸状部材の往復運動に変換する。上記ガイド面は、上記第1のダイヤフラムと上記第2のダイヤフラムとの間に形成され、上記軸状部材のその軸方向への直線移動を案内する。
これにより軸状部材のその軸方向に沿った直線移動が確保されるため、ダイヤフラムの劣化を抑制することができるとともに、循環ポンプの耐久性を高めることができる。 In the above configuration, the drive mechanism may further include a motor, an eccentric member, and a guide surface.
The motor has a rotating shaft. The eccentric member is connected between the rotating shaft and the shaft-shaped member, and converts the rotational motion of the rotating shaft into the reciprocating motion of the shaft-shaped member. The guide surface is formed between the first diaphragm and the second diaphragm, and guides the linear movement of the shaft-shaped member in the axial direction.
As a result, the linear movement of the shaft-shaped member along the axial direction is ensured, so that the deterioration of the diaphragm can be suppressed and the durability of the circulation pump can be enhanced.
また、上記駆動機構は、前記第1及び第2のポンプ室のうち何れか一方へ前記軸状部材を付勢する付勢部材をさらに有してもよい。
これにより偏心部材と軸状部材とを常に密着させておくことができるため、目的とする流量の水を安定して吐出することができる。 The drive mechanism may further include a biasing member that biases the shaft-shaped member toward one of the first and second pump chambers.
As a result, the eccentric member and the shaft-like member can always be kept in close contact with each other, so that a target flow rate of water can be stably discharged.
これにより偏心部材と軸状部材とを常に密着させておくことができるため、目的とする流量の水を安定して吐出することができる。 The drive mechanism may further include a biasing member that biases the shaft-shaped member toward one of the first and second pump chambers.
As a result, the eccentric member and the shaft-like member can always be kept in close contact with each other, so that a target flow rate of water can be stably discharged.
以下、図面を参照しながら、本発明の実施形態を説明する。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<第1の実施形態>
図1は、本発明の一実施形態に係る給湯システムとしての燃料電池システムの構成を示す配管ブロック図である。以下、本実施形態の燃料電池システム100の全体構成について説明する。 <First Embodiment>
FIG. 1 is a piping block diagram showing a configuration of a fuel cell system as a hot water supply system according to an embodiment of the present invention. Hereinafter, the overall configuration of thefuel cell system 100 of the present embodiment will be described.
図1は、本発明の一実施形態に係る給湯システムとしての燃料電池システムの構成を示す配管ブロック図である。以下、本実施形態の燃料電池システム100の全体構成について説明する。 <First Embodiment>
FIG. 1 is a piping block diagram showing a configuration of a fuel cell system as a hot water supply system according to an embodiment of the present invention. Hereinafter, the overall configuration of the
[燃料電池システム]
本実施形態の燃料電池システム100は、燃料電池ユニット1と、貯湯タンク2と、循環ポンプ3とを有する。 [Fuel cell system]
Thefuel cell system 100 of the present embodiment includes a fuel cell unit 1, a hot water storage tank 2, and a circulation pump 3.
本実施形態の燃料電池システム100は、燃料電池ユニット1と、貯湯タンク2と、循環ポンプ3とを有する。 [Fuel cell system]
The
燃料電池ユニット1は、燃料ガス供給部11と、水蒸気供給部12と、改質器13と、燃料電池14と、排熱回収部15とを有する。
The fuel cell unit 1 includes a fuel gas supply unit 11, a water vapor supply unit 12, a reformer 13, a fuel cell 14, and an exhaust heat recovery unit 15.
燃料ガス供給部11は、改質器13へ燃料ガスを供給する。燃料ガス供給部11は、典型的には、ブロワ、流量制御弁等を含む。燃料ガスとしては、例えば、天然ガス、都市ガス(メタンガス)、プロパンガス等の炭化水素ガスが用いられる。
The fuel gas supply unit 11 supplies fuel gas to the reformer 13. The fuel gas supply unit 11 typically includes a blower, a flow control valve, and the like. As fuel gas, hydrocarbon gas, such as natural gas, city gas (methane gas), and propane gas, is used, for example.
水蒸気供給部12は、改質器13へ水蒸気を供給する。水蒸気供給部12は、典型的には、給水ポンプ、気化器等を含む。上記気化器は、改質器13に設けられた触媒の加熱源(バーナ)で構成されてもよい。水蒸気供給部12は、改質器13へ直接、水蒸気を供給するように構成されてもよい。
The steam supply unit 12 supplies steam to the reformer 13. The water vapor supply unit 12 typically includes a water supply pump, a vaporizer, and the like. The vaporizer may include a catalyst heating source (burner) provided in the reformer 13. The steam supply unit 12 may be configured to supply steam directly to the reformer 13.
改質器13は、改質触媒を有し、燃料ガス供給部11及び水蒸気供給部12から各々所定流量で供給された燃料ガス及び水蒸気の混合ガスを上記改質触媒と反応させることで、燃料ガスを水素リッチガスに変換(改質)する。
The reformer 13 has a reforming catalyst, and reacts a fuel gas and a mixed gas of steam supplied from the fuel gas supply unit 11 and the steam supply unit 12 at a predetermined flow rate with the reforming catalyst, respectively. The gas is converted (reformed) into hydrogen-rich gas.
改質器13には選択酸化用の空気供給部16が接続されており、空気供給部16から供給される空気(酸素)によって、改質反応で生じる一酸化炭素(CO)が二酸化炭素(CO2)に酸化される。改質器バーナの排ガスはガス通路131を介して排熱回収部15に導入される。
An air supply unit 16 for selective oxidation is connected to the reformer 13, and carbon monoxide (CO) generated in the reforming reaction by the air (oxygen) supplied from the air supply unit 16 is carbon dioxide (CO 2 ) Oxidized to. The exhaust gas from the reformer burner is introduced into the exhaust heat recovery unit 15 through the gas passage 131.
燃料電池14は、改質器13から供給される水素リッチガス(H2)と酸素供給部17から供給される酸素(O2)との電気化学反応を利用して発電する。燃料電池14は、典型的には、燃料電池セルのスタック構造を有する。燃料電池セルは、水素リッチガスが供給される燃料極(負極)と酸素が供給される空気極(正極)とで電解質層を挟み込んで構成される。
The fuel cell 14 generates power using an electrochemical reaction between the hydrogen rich gas (H 2 ) supplied from the reformer 13 and oxygen (O 2 ) supplied from the oxygen supply unit 17. The fuel cell 14 typically has a stack structure of fuel cells. The fuel battery cell is configured by sandwiching an electrolyte layer between a fuel electrode (negative electrode) to which hydrogen-rich gas is supplied and an air electrode (positive electrode) to which oxygen is supplied.
燃料電池14で発電された直流電力は、電力変換装置4によって交流電力に変換される。電力変換装置4は、典型的には、インバータで構成される。燃料電池14で生成された水(H2O)は、図示しない水タンクに排出される。燃料電池14において反応の寄与しなかった水素リッチガス(オフガス)は、改質器13へ供給されて加熱源(バーナ)の燃料として利用される。
The DC power generated by the fuel cell 14 is converted into AC power by the power conversion device 4. The power conversion device 4 is typically composed of an inverter. Water (H 2 O) generated in the fuel cell 14 is discharged to a water tank (not shown). The hydrogen-rich gas (off-gas) that has not contributed to the reaction in the fuel cell 14 is supplied to the reformer 13 and used as fuel for a heating source (burner).
排熱回収部15は、改質器13から排出された排ガスと、循環通路22を循環する貯湯タンク2内の水との間で熱交換するための熱交換器で構成される。これにより貯湯タンク2内の水は、循環通路22を循環しながら排熱回収部15によって所定温度にまで加温される。熱交換後の排ガスは、燃料電池ユニット1の外部へ排出される。このように、燃料電池ユニット1の排熱を熱源として、貯湯タンク2内の水を加温することができる。
The exhaust heat recovery unit 15 includes a heat exchanger for exchanging heat between the exhaust gas discharged from the reformer 13 and the water in the hot water storage tank 2 circulating through the circulation passage 22. As a result, the water in the hot water storage tank 2 is heated to a predetermined temperature by the exhaust heat recovery unit 15 while circulating through the circulation passage 22. The exhaust gas after heat exchange is discharged to the outside of the fuel cell unit 1. Thus, the water in the hot water storage tank 2 can be heated using the exhaust heat of the fuel cell unit 1 as a heat source.
排熱回収部15は、上述の構成に限られず、改質器13からの排ガスに代えて又はこれに加えて、燃料電池14を冷却するための冷却水が導入されるように構成されてもよい。このような構成によっても、燃料電池ユニット1の排熱を熱源として、貯湯タンク2内の水を加温することができる。
The exhaust heat recovery unit 15 is not limited to the above-described configuration, and may be configured such that cooling water for cooling the fuel cell 14 is introduced instead of or in addition to the exhaust gas from the reformer 13. Good. Also with such a configuration, the water in the hot water storage tank 2 can be heated using the exhaust heat of the fuel cell unit 1 as a heat source.
貯湯タンク2は、給湯用の温水を貯留することが可能な所定容積の内部空間を有する密閉タンクで構成される。貯湯タンク2には、給水管(水道管)21と、循環通路22と、出湯管23とが接続されている。
The hot water storage tank 2 is constituted by a sealed tank having an internal space with a predetermined volume capable of storing hot water for hot water supply. A water supply pipe (water pipe) 21, a circulation passage 22 and a hot water discharge pipe 23 are connected to the hot water storage tank 2.
給水管21は、貯湯タンク2の底部に接続されており、貯湯タンク2の内部空間に水道水を導入することが可能に構成される。循環通路22は、貯湯タンク2の底部と循環ポンプ3の吸込口(入口)との間を連絡する第1の通水管221と、循環ポンプ3の吐出口(出口)と貯湯タンク2の頂部との間を連絡し、排熱回収部15を通過する第2の通水管222とを有する。出湯管23は、貯湯タンク2の頂部に接続され、貯湯タンク2内の湯を図示しない給湯ラインへ供給する。
The water supply pipe 21 is connected to the bottom of the hot water storage tank 2 and is configured to be able to introduce tap water into the internal space of the hot water storage tank 2. The circulation passage 22 includes a first water pipe 221 that communicates between the bottom of the hot water storage tank 2 and the suction port (inlet) of the circulation pump 3, a discharge port (outlet) of the circulation pump 3, and the top of the hot water storage tank 2. And a second water pipe 222 that passes through the exhaust heat recovery unit 15. The hot water discharge pipe 23 is connected to the top of the hot water storage tank 2 and supplies hot water in the hot water storage tank 2 to a hot water supply line (not shown).
貯湯タンク2は、リリーフ弁24を有する。リリーフ弁24は、貯湯タンク2の内圧が所定圧(例えば450kPa)を超えたときに開弁するように構成される。
The hot water storage tank 2 has a relief valve 24. The relief valve 24 is configured to open when the internal pressure of the hot water storage tank 2 exceeds a predetermined pressure (for example, 450 kPa).
循環ポンプ3は、循環通路22に設置されており、貯湯タンク2内の水を貯湯タンク2と排熱回収部15との間で循環させることが可能に構成される。循環ポンプ3の構成の詳細については後述する。
The circulation pump 3 is installed in the circulation passage 22 and configured to circulate water in the hot water storage tank 2 between the hot water storage tank 2 and the exhaust heat recovery unit 15. Details of the configuration of the circulation pump 3 will be described later.
本実施形態の燃料電池システム100は、システム全体の運転を制御するコントローラ5を有しており、コントローラ5によって燃料電池ユニット1における発電制御、循環ポンプ3の運転制御、貯湯タンク2への給水制御、貯湯タンク2からの出湯制御等が実行される。
The fuel cell system 100 of the present embodiment has a controller 5 that controls the operation of the entire system. The controller 5 controls the power generation in the fuel cell unit 1, the operation control of the circulation pump 3, and the water supply control to the hot water storage tank 2. The hot water control from the hot water storage tank 2 is executed.
例えば、コントローラ5は、外部からの出湯指令に応じて、出湯管23に設けられた開閉弁231を開閉するとともに、貯湯タンク2内の湯が一定以上の水位となるように、給水管21に設けられた開閉弁211を開閉する。またコントローラ5は、排熱回収部15における熱交換に最適な流量となるように、循環ポンプ3の吐出流量を一定に制御する。
For example, the controller 5 opens and closes the opening / closing valve 231 provided in the hot water discharge pipe 23 in response to an external hot water discharge command, and supplies the hot water in the hot water storage tank 2 to the water supply pipe 21 so that the water level becomes a certain level or higher. The provided on-off valve 211 is opened and closed. Further, the controller 5 controls the discharge flow rate of the circulation pump 3 to be constant so that the flow rate is optimal for heat exchange in the exhaust heat recovery unit 15.
一方、貯湯タンク2の内圧は、貯湯タンク2内の水量や水道圧(給水圧)等の変化により、所定の圧力範囲(例えば200kPa~300kPaの範囲)で大きく変動する。このため、貯湯タンク2内の水圧を常に受けながら駆動される循環ポンプ3には、水圧変動に対する耐久性と安定した吐出流量が要求されるとともに、リリーフ弁24の開弁圧力(450kPa)に相当する圧力に対する耐水圧が要求される。
On the other hand, the internal pressure of the hot water storage tank 2 largely fluctuates within a predetermined pressure range (for example, a range of 200 kPa to 300 kPa) due to changes in the amount of water in the hot water storage tank 2 and the water pressure (water supply pressure). For this reason, the circulation pump 3 that is driven while constantly receiving the water pressure in the hot water storage tank 2 is required to have durability against water pressure fluctuation and a stable discharge flow rate, and corresponds to the valve opening pressure (450 kPa) of the relief valve 24. The water pressure resistance against the pressure is required.
そこで本実施形態の循環ポンプ3は、図2及び図3に示すポンプ装置で構成される。以下、循環ポンプ3の詳細について説明する。
Therefore, the circulation pump 3 of the present embodiment is configured by the pump device shown in FIGS. Hereinafter, the details of the circulation pump 3 will be described.
[ポンプ装置の構成]
図2は、循環ポンプ3として適用されるポンプ装置3Aの構成を示す断面図であり、図3は、図2における[A]-[A]線断面図である。各図においてX軸、Y軸及びZ軸は、相互に直交する3軸方向を示している。 [Configuration of pump device]
2 is a cross-sectional view showing a configuration of apump device 3A applied as the circulation pump 3, and FIG. 3 is a cross-sectional view taken along line [A]-[A] in FIG. In each figure, an X axis, a Y axis, and a Z axis indicate three axial directions orthogonal to each other.
図2は、循環ポンプ3として適用されるポンプ装置3Aの構成を示す断面図であり、図3は、図2における[A]-[A]線断面図である。各図においてX軸、Y軸及びZ軸は、相互に直交する3軸方向を示している。 [Configuration of pump device]
2 is a cross-sectional view showing a configuration of a
ポンプ装置3Aは、本体30と、駆動機構40と、通路部50とを有する。
The pump device 3 </ b> A includes a main body 30, a drive mechanism 40, and a passage portion 50.
(本体)
本体30は、入口31と、出口32とを有する。入口31は、第1の通水管221を介して貯湯タンク2(液圧源)に接続され、貯湯タンク2内の水が流入可能に構成される。出口31は、第2の通水管222を介して燃料電池ユニット1の排熱回収部15(熱源)に接続される。 (Main unit)
Themain body 30 has an inlet 31 and an outlet 32. The inlet 31 is connected to the hot water storage tank 2 (hydraulic pressure source) via the first water pipe 221 so that water in the hot water storage tank 2 can flow in. The outlet 31 is connected to the exhaust heat recovery unit 15 (heat source) of the fuel cell unit 1 through the second water conduit 222.
本体30は、入口31と、出口32とを有する。入口31は、第1の通水管221を介して貯湯タンク2(液圧源)に接続され、貯湯タンク2内の水が流入可能に構成される。出口31は、第2の通水管222を介して燃料電池ユニット1の排熱回収部15(熱源)に接続される。 (Main unit)
The
本実施形態において本体30は、第1の本体部301と、第1の本体部301の一端(図2において下端)に固定された第2の本体部302と、第1の本体部301の他端(図2において上端)に固定された第3の本体部303とを有する。第1~第3の本体部301~303は、アルミニウム合金等の金属材料で構成され、それぞれ複数の締結具B1を介して相互に結合されている。
In the present embodiment, the main body 30 includes a first main body 301, a second main body 302 fixed to one end of the first main body 301 (the lower end in FIG. 2), and the first main body 301. And a third main body 303 fixed to the end (upper end in FIG. 2). The first to third main body portions 301 to 303 are made of a metal material such as an aluminum alloy, and are coupled to each other via a plurality of fasteners B1.
入口31は、第2の本体部302に形成された入力ポート302aに設けられ、第1の通水管221の端部とシールリングSを介して液密に接続される。出口32は、第3の本体部303に形成された出力ポート303aに設けられ、第2の通水管222の端部とシールリングSを介して液密に接続される。第1及び第2の通水管221,222は循環通路22を構成し、それぞれ抜け止め部材61,62を介して入力ポート302a及び出力ポート303aに固定される。
The inlet 31 is provided in an input port 302 a formed in the second main body 302, and is liquid-tightly connected to the end of the first water conduit 221 through the seal ring S. The outlet 32 is provided in an output port 303 a formed in the third main body portion 303, and is liquid-tightly connected to the end portion of the second water pipe 222 through the seal ring S. The first and second water pipes 221 and 222 constitute the circulation passage 22 and are fixed to the input port 302a and the output port 303a via retaining members 61 and 62, respectively.
第3の本体部303の出力ポート303a内には、逆止弁V1が配置されている。逆止弁V1は、第2のポンプ室P2から出口32への方向の液連通を許容するが、それとは逆方向への液連通を禁止する機能を有する。これにより、排熱回収部15からポンプ装置3Aへの循環水の逆流が防止される。逆止弁V1には種々のチェックバルブが採用可能であり、本実施形態ではダックビル弁が用いられる。
In the output port 303a of the third main body 303, a check valve V1 is disposed. The check valve V1 has a function of permitting liquid communication in the direction from the second pump chamber P2 to the outlet 32 but prohibiting liquid communication in the opposite direction. Thereby, the backflow of the circulating water from the exhaust heat recovery part 15 to the pump device 3A is prevented. Various check valves can be used as the check valve V1, and a duckbill valve is used in this embodiment.
本体30は更に、入口31と連通する第1のポンプ室P1と、出口32と連通する第2のポンプ室P2とを有する。第1のポンプ室P1は、第2の本体部301と、第1のダイヤフラム41との間に形成される。第2のポンプ室P2は、第3の本体部303と、第2のダイヤフラム42との間に形成される。
The main body 30 further includes a first pump chamber P1 that communicates with the inlet 31 and a second pump chamber P2 that communicates with the outlet 32. The first pump chamber P <b> 1 is formed between the second main body portion 301 and the first diaphragm 41. The second pump chamber P <b> 2 is formed between the third main body portion 303 and the second diaphragm 42.
(駆動機構)
駆動機構40は、第1のポンプ室P1に臨む第1のダイヤフラム41(第1の可動部)と、第2のポンプ室P2に臨む第2のダイヤフラム42(第2の可動部)とを有する。 (Drive mechanism)
Thedrive mechanism 40 includes a first diaphragm 41 (first movable portion) that faces the first pump chamber P1, and a second diaphragm 42 (second movable portion) that faces the second pump chamber P2. .
駆動機構40は、第1のポンプ室P1に臨む第1のダイヤフラム41(第1の可動部)と、第2のポンプ室P2に臨む第2のダイヤフラム42(第2の可動部)とを有する。 (Drive mechanism)
The
第1及び第2のダイヤフラム41,42はそれぞれ、合成ゴム等の弾性材料で構成され、典型的には円盤形状に形成される。第1のダイヤフラム41は、その周縁部が第1の本体部301と第2の本体部302との間に液密に挟持されることで、第1のポンプ室P1を区画する。第2のダイヤフラム42は、その周縁部が第1の本体部301と第3の本体部303との間に液密に挟持されることで、第2のポンプ室P2を区画する。
The first and second diaphragms 41 and 42 are each made of an elastic material such as synthetic rubber, and are typically formed in a disk shape. The first diaphragm 41 has a peripheral portion sandwiched between the first main body 301 and the second main body 302 in a liquid-tight manner, thereby partitioning the first pump chamber P1. As for the 2nd diaphragm 42, the peripheral part is clamped between the 1st main-body part 301 and the 3rd main-body part 303 liquid-tightly, and the 2nd pump chamber P2 is divided.
駆動機構40は、第1及び第2のダイヤフラム41,42をそれぞれ第1及び第2のポンプ室P1,P2内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能に構成される。ここで、「相互にポンプ作動サイクルが逆位相」とは、第1及び第2のダイヤフラム41,42の一方のダイヤフラムが吸入方向に移動するときに他方のダイヤフラムが吐出方向に移動することを意味する。
The drive mechanism 40 is configured to be able to reciprocate the first and second diaphragms 41 and 42 in the first and second pump chambers P1 and P2, respectively, so that the pump operation cycles are opposite to each other. The Here, “the pump operation cycle is opposite in phase” means that when one of the first and second diaphragms 41 and 42 moves in the suction direction, the other diaphragm moves in the discharge direction. To do.
本実施形態において駆動機構40は、軸状部材43と、モータMと、偏心部材44とを有する。
In the present embodiment, the drive mechanism 40 includes a shaft-like member 43, a motor M, and an eccentric member 44.
軸状部材43は、Z軸方向に軸方向を有する略円柱状の金属部品で構成され、第1の本体部301の内部にZ軸方向に沿って形成された貫通孔46の内部に配置される。軸状部材43の外周面の一部は、貫通孔46の内壁面に摺接しつつ、Z軸方向に往復移動可能に構成される。
The shaft-shaped member 43 is formed of a substantially cylindrical metal part having an axial direction in the Z-axis direction, and is disposed in a through hole 46 formed in the first main body 301 along the Z-axis direction. The A part of the outer peripheral surface of the shaft-shaped member 43 is configured to be capable of reciprocating in the Z-axis direction while being in sliding contact with the inner wall surface of the through hole 46.
軸状部材43は、第1のダイヤフラム41に固定される第1の端部431と、第2のダイヤフラム42に固定される第2の端部432とを有する。第1及び第2のダイヤフラム41,42は、それらの中心を貫通する締結具B2を介して軸状部材43にそれぞれ固定される。軸状部材43が収容される貫通孔46の内部は外気に連通し、大気圧とされる。
The shaft-shaped member 43 has a first end 431 fixed to the first diaphragm 41 and a second end 432 fixed to the second diaphragm 42. The 1st and 2nd diaphragms 41 and 42 are each fixed to the shaft-shaped member 43 via fastener B2 which penetrates those centers. The inside of the through hole 46 in which the shaft-like member 43 is accommodated communicates with the outside air and is at atmospheric pressure.
第1及び第2のダイヤフラム41,42は、軸状部材43の移動に伴って変形し、第1及び第2のポンプ室P1,P2の容積を変化させる。第1及び第2のダイヤフラム41,42は軸状部材43の2つの端部431,432に設けられているため、相互に同期して往復移動する。
The first and second diaphragms 41 and 42 are deformed with the movement of the shaft-like member 43 to change the volumes of the first and second pump chambers P1 and P2. Since the first and second diaphragms 41 and 42 are provided at the two end portions 431 and 432 of the shaft-like member 43, they reciprocate in synchronization with each other.
軸状部材43の中心部にはY軸方向に貫通する結合孔43aが設けられている。結合孔43aのY軸方向から見た断面形状は、図3に示すように、X軸方向に長軸方向を有する長孔で形成されている。
A coupling hole 43 a penetrating in the Y-axis direction is provided at the center of the shaft-shaped member 43. As shown in FIG. 3, the cross-sectional shape of the coupling hole 43a viewed from the Y-axis direction is a long hole having a major axis direction in the X-axis direction.
モータMは、複数本の締結具B3を介して第1の本体部301に固定されるとともに、第1の本体部301の外周面と貫通孔46の間を貫通する回転軸Msを有する。モータMとしては、種々の電動モータが適用可能であり、本実施形態では高精度な回転数制御が可能なステッピングモータが用いられている。
The motor M is fixed to the first main body 301 via a plurality of fasteners B3, and has a rotation shaft Ms penetrating between the outer peripheral surface of the first main body 301 and the through hole 46. As the motor M, various electric motors can be applied. In this embodiment, a stepping motor capable of high-speed rotation speed control is used.
偏心部材44は、軸状部材43の結合孔43aに結合される軸部44aと、回転軸Msと結合される筒部44bとを有し、回転軸Msと軸状部材43との間に接続される。偏心部材44の軸部44aは、ベアリング45を介して軸状部材43の結合孔43aに結合されている。
The eccentric member 44 has a shaft portion 44 a coupled to the coupling hole 43 a of the shaft-shaped member 43 and a cylindrical portion 44 b coupled to the rotation shaft Ms, and is connected between the rotation shaft Ms and the shaft-shaped member 43. Is done. The shaft portion 44 a of the eccentric member 44 is coupled to the coupling hole 43 a of the shaft-shaped member 43 through the bearing 45.
偏心部材44は、回転軸MsのY軸まわりの回転運動を軸状部材43のZ軸方向への往復運動に変換する。軸状部材43のZ軸方向に沿ったストロークは、モータMの回転軸Msの軸心に対する偏心部材44の軸部44aの軸心の偏心量Eで決定される。
The eccentric member 44 converts the rotational motion of the rotational axis Ms around the Y axis into the reciprocating motion of the shaft-shaped member 43 in the Z-axis direction. The stroke along the Z-axis direction of the shaft member 43 is determined by the eccentric amount E of the shaft center of the shaft portion 44 a of the eccentric member 44 with respect to the shaft center of the rotation shaft Ms of the motor M.
貫通孔46は、第1のダイヤフラム41と第2のダイヤフラム42との間に形成され、貫通孔46の一部の内壁面は、軸状部材43の軸方向(Z軸方向)への直線移動を案内するガイド面として機能する。これにより第1及び第2のダイヤフラム41,42は、それぞれ第1及び第2のポンプ室P1,P2内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能となる。
The through hole 46 is formed between the first diaphragm 41 and the second diaphragm 42, and a part of the inner wall surface of the through hole 46 is linearly moved in the axial direction (Z-axis direction) of the shaft-like member 43. It functions as a guide surface for guiding. Accordingly, the first and second diaphragms 41 and 42 can be reciprocated in the first and second pump chambers P1 and P2, respectively, so that the pump operation cycles are in opposite phases.
本実施形態では、第1のポンプ室P1内における第1のダイヤフラム41の受圧面積は、第2のポンプ室P2内における第2のダイヤフラム42の受圧面積と同一に構成される。これにより、両ダイヤフラム41,42間での受圧面積差がゼロとなり、水圧変動で駆動機構が被る悪影響を排除することができる。
In the present embodiment, the pressure receiving area of the first diaphragm 41 in the first pump chamber P1 is configured to be the same as the pressure receiving area of the second diaphragm 42 in the second pump chamber P2. As a result, the pressure receiving area difference between the two diaphragms 41 and 42 becomes zero, and the adverse effect of the drive mechanism due to fluctuations in water pressure can be eliminated.
さらに駆動機構40は、第1及び第2のポンプ室P1,P2のうち何れか一方へ軸状部材43を付勢する付勢部材47を有する。本実施形態では、付勢部材47は、第2のポンプ室P2へ向けて軸状部材43を付勢するコイルバネで構成され、軸状部材43の第2の端部432の周囲に形成された突出部431と、貫通孔46の段部461との間に装着されている。
Furthermore, the drive mechanism 40 has a biasing member 47 that biases the shaft-like member 43 to one of the first and second pump chambers P1 and P2. In the present embodiment, the urging member 47 is configured by a coil spring that urges the shaft-like member 43 toward the second pump chamber P <b> 2, and is formed around the second end portion 432 of the shaft-like member 43. It is mounted between the protruding portion 431 and the step portion 461 of the through hole 46.
付勢部材47を設置することで、軸状部材43と偏心部材44とを常に密着させておくことができ、これにより軸状部材43を偏心量Eの2倍に相当する設計どおりのストロークを確保することができる。また、結合孔43aとベアリング45との組み付け時にこれらの間に隙間が生じていたとしても、付勢部材47により当該隙間を吸収できるため、両者間の組み付け性が阻害されることもない。
By installing the urging member 47, the shaft-like member 43 and the eccentric member 44 can be kept in close contact with each other, so that the stroke of the shaft-like member 43 as designed is equivalent to twice the amount of eccentricity E. Can be secured. Further, even if a gap is generated between the coupling hole 43a and the bearing 45 when assembled, the biasing member 47 can absorb the gap, so that the assembling property between the two is not hindered.
(通路部)
通路部50は、第1のポンプ室P1と第2のポンプ室P2との間に接続され、第1のポンプ室P1から第2のポンプ室P2への液連通を可能とする。通路部50は、配管部材51と、逆止弁V2(第1の逆止弁)とを有する。 (Passage)
Thepassage portion 50 is connected between the first pump chamber P1 and the second pump chamber P2, and enables liquid communication from the first pump chamber P1 to the second pump chamber P2. The passage portion 50 includes a piping member 51 and a check valve V2 (first check valve).
通路部50は、第1のポンプ室P1と第2のポンプ室P2との間に接続され、第1のポンプ室P1から第2のポンプ室P2への液連通を可能とする。通路部50は、配管部材51と、逆止弁V2(第1の逆止弁)とを有する。 (Passage)
The
配管部材51は、第1のポンプ室P1に接続される第1の端部511と、第2のポンプ室P2に接続される第2の端部512とを有する。第1の端部511は、第2の本体部302に形成された出力ポート302bにシールリングSを介して液密に接続される。第2の端部512は、第3の本体部303に形成された入力ポート303bにシールリングSを介して液密に接続される。第1及び第2の端部511,512は、それぞれ抜け止め部材63,64を介して出力ポート302b及び入力ポート303bに固定される。
The piping member 51 has a first end portion 511 connected to the first pump chamber P1 and a second end portion 512 connected to the second pump chamber P2. The first end 511 is liquid-tightly connected to the output port 302 b formed in the second main body 302 via the seal ring S. The second end portion 512 is liquid-tightly connected to the input port 303 b formed in the third main body portion 303 via the seal ring S. The first and second end portions 511 and 512 are fixed to the output port 302b and the input port 303b via retaining members 63 and 64, respectively.
逆止弁V2は、第3の本体部303の入力ポート303bの内部に配置されている。逆止弁V2には種々のチェックバルブが採用可能であり、本実施形態ではダックビル弁が用いられる。
The check valve V2 is arranged inside the input port 303b of the third main body 303. Various check valves can be used as the check valve V2, and a duckbill valve is used in this embodiment.
逆止弁V2は、第1のポンプ室P1から第2のポンプ室P2への方向の液連通を許容するが、それとは逆方向への液連通を禁止する機能を有する。これにより第2のポンプ室P2における加圧水を第1のポンプ室P1側へ逆流させることなく出口32側へ安定して送出することができるので、ポンプ装置3Aの運転効率を高めることができる。
The check valve V2 has a function of permitting liquid communication in the direction from the first pump chamber P1 to the second pump chamber P2, but prohibiting liquid communication in the opposite direction. Accordingly, the pressurized water in the second pump chamber P2 can be stably sent to the outlet 32 side without flowing back to the first pump chamber P1, so that the operation efficiency of the pump device 3A can be increased.
[ポンプ装置の動作]
次に、以上のように構成される本実施形態のポンプ装置3Aの典型的な動作について説明する。 [Operation of pump device]
Next, a typical operation of thepump device 3A of the present embodiment configured as described above will be described.
次に、以上のように構成される本実施形態のポンプ装置3Aの典型的な動作について説明する。 [Operation of pump device]
Next, a typical operation of the
駆動機構40は、第1及び第2のダイヤフラム41,42をそれぞれ第1及び第2のポンプ室P1,P2内で相互にポンプ作動サイクルが逆位相となるように往復させる。これにより第1及び第2のポンプ室P1,P2の容積が周期的に変化し、入口31に導入された循環水は、第1のポンプ室P1及び第2のポンプ室P2で交互に加圧されて、出口32から排熱回収部15へ所定流量で送出される。
The drive mechanism 40 reciprocates the first and second diaphragms 41 and 42 in the first and second pump chambers P1 and P2, respectively, such that the pump operation cycles are in opposite phases. As a result, the volumes of the first and second pump chambers P1, P2 change periodically, and the circulating water introduced into the inlet 31 is alternately pressurized in the first pump chamber P1 and the second pump chamber P2. Then, it is sent out from the outlet 32 to the exhaust heat recovery unit 15 at a predetermined flow rate.
ポンプ装置3Aから送出される水の流量は、典型的には、単位時間当たりの両ダイヤフラム41,42の往復回数で制御される。具体的には、モータMの回転軸Msの回転数を制御することで、ポンプ装置3Aの吐出流量が制御される。モータMの駆動は、コントローラ5で制御される。コントローラ5は、排熱回収部15における熱交換に最適な流量となるように、モータMの駆動を制御する。
The flow rate of water delivered from the pump device 3A is typically controlled by the number of reciprocations of both the diaphragms 41 and 42 per unit time. Specifically, the discharge flow rate of the pump device 3A is controlled by controlling the rotation speed of the rotation shaft Ms of the motor M. The drive of the motor M is controlled by the controller 5. The controller 5 controls the driving of the motor M so that the flow rate is optimal for heat exchange in the exhaust heat recovery unit 15.
本実施形態において、軸状部材43は、貫通孔46の内壁面(ガイド面)に沿ってZ軸方向に直線的に移動するように構成されているため、第1及び第2のダイヤフラム41,42は、Z軸方向に沿った応力のみを受けて直線的に変形する。このため、他の揺動式ダイヤフラムポンプと比較してダイヤフラムに加わる変形負荷を軽減できるため、耐久性の向上を図ることができる。
In the present embodiment, since the shaft-like member 43 is configured to move linearly in the Z-axis direction along the inner wall surface (guide surface) of the through hole 46, the first and second diaphragms 41, 42 receives only the stress along the Z-axis direction and deforms linearly. For this reason, since the deformation | transformation load added to a diaphragm can be reduced compared with another rocking | fluctuation diaphragm pump, durability can be improved.
本実施形態において、第2のポンプ室P2は、通路部50を介して第1のポンプ室P1と連通している。このため、入口31に導入された貯湯タンク2内の水圧は、第1のダイヤフラム41及び第2のダイヤフラム42に同時に作用する。第1のダイヤフラム41に作用する圧力は、軸状部材43を第2のポンプ室P2に向けて加圧し、第2のダイヤフラム42に作用する圧力は、軸状部材43を第1のポンプ室P1に向けて加圧する。
In the present embodiment, the second pump chamber P2 communicates with the first pump chamber P1 through the passage portion 50. For this reason, the water pressure in the hot water storage tank 2 introduced into the inlet 31 acts on the first diaphragm 41 and the second diaphragm 42 simultaneously. The pressure acting on the first diaphragm 41 pressurizes the shaft-like member 43 toward the second pump chamber P2, and the pressure acting on the second diaphragm 42 forces the shaft-like member 43 in the first pump chamber P1. Pressurize toward
したがって本実施形態によれば、貯湯タンク2内の水圧が大きく変動したとしても、両ダイヤフラム41,42間の受圧面積差で水圧変動分が相殺される。特に本実施形態においては、第1及び第2のダイヤフラム41,42の受圧面積が相互に同一であるため、上記水圧変動はほぼ完全にキャンセルされる。このため駆動機構40は、水圧変動の有無に関係なく、ほぼ一定の負荷でポンプ装置3Aを駆動することが可能となる。
Therefore, according to the present embodiment, even if the water pressure in the hot water storage tank 2 fluctuates greatly, the water pressure fluctuation is offset by the pressure receiving area difference between the diaphragms 41 and 42. In particular, in the present embodiment, since the pressure receiving areas of the first and second diaphragms 41 and 42 are the same, the water pressure fluctuation is almost completely cancelled. Therefore, the drive mechanism 40 can drive the pump device 3A with a substantially constant load regardless of the presence or absence of water pressure fluctuation.
また上述のように、貯湯タンク2内の水圧変動が生じたとしても駆動機構40に加わる負荷の変動を抑えることができるため、安定した吐出流量を維持することができるとともに、ポンプ装置3Aの消費電力も低減することができる。
Further, as described above, even if the water pressure fluctuation in the hot water storage tank 2 occurs, the fluctuation of the load applied to the drive mechanism 40 can be suppressed, so that a stable discharge flow rate can be maintained and the consumption of the pump device 3A can be maintained. Electric power can also be reduced.
さらに本実施形態によれば、貯湯タンク2の内圧上昇がリリーフ弁24の開弁圧力(約450kPa)に達するほどの過大な水圧が入力されたとしても、駆動機構40に加わるストレスを低く抑えることができる。このため、特別な構造を別途設けることなく低コストで容易にポンプの耐水圧を高めることができる。
Furthermore, according to this embodiment, even if an excessive water pressure is input so that the increase in the internal pressure of the hot water storage tank 2 reaches the valve opening pressure (about 450 kPa) of the relief valve 24, the stress applied to the drive mechanism 40 is kept low. Can do. For this reason, the water pressure resistance of the pump can be easily increased at low cost without providing a special structure.
以上のように本実施形態によれば、貯湯タンク2内の水圧変動に対する耐水圧特性と安定した吐出流量を確保することができる燃料電池システムを構築することができる。
As described above, according to the present embodiment, it is possible to construct a fuel cell system that can secure a water pressure resistance against a fluctuation in water pressure in the hot water storage tank 2 and a stable discharge flow rate.
<第2の実施形態>
図4は、本発明の第2の実施形態に係るポンプ装置の構成を示す断面図である。以下、第1の実施形態と異なる構成について主に説明し、上述の実施形態と同様の構成については同様の符号を付しその説明を省略または簡略化する。 <Second Embodiment>
FIG. 4 is a cross-sectional view showing a configuration of a pump device according to the second embodiment of the present invention. Hereinafter, configurations different from those of the first embodiment will be mainly described, and configurations similar to those of the above-described embodiment will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
図4は、本発明の第2の実施形態に係るポンプ装置の構成を示す断面図である。以下、第1の実施形態と異なる構成について主に説明し、上述の実施形態と同様の構成については同様の符号を付しその説明を省略または簡略化する。 <Second Embodiment>
FIG. 4 is a cross-sectional view showing a configuration of a pump device according to the second embodiment of the present invention. Hereinafter, configurations different from those of the first embodiment will be mainly described, and configurations similar to those of the above-described embodiment will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
本実施形態のポンプ装置3Bは、燃料電池システム100における循環ポンプ3として適用可能である。ポンプ装置3Bは、本体30と、駆動機構40と、通路部50とを有する。本実施形態においては、第1及び第2のダイヤフラム41,42を支持する軸状部材43'が2分割構造を有する点で、上述の第1の実施形態と異なる。すなわち軸状部材43'は、その軸方向に関して分割された第1及び第2の軸状部M1,M2を有する。
The pump device 3B of the present embodiment is applicable as the circulation pump 3 in the fuel cell system 100. The pump device 3 </ b> B includes a main body 30, a drive mechanism 40, and a passage portion 50. This embodiment is different from the above-described first embodiment in that the shaft-like member 43 ′ that supports the first and second diaphragms 41 and 42 has a two-part structure. That is, the shaft-like member 43 ′ has first and second shaft-like portions M1, M2 that are divided in the axial direction.
第1の軸状部M1は、第1のダイヤフラム41に固定され、第2の軸状部M2は、第2のダイヤフラム42に固定される。ベアリング45を介して偏心部材44と結合される結合孔43aは、第2の軸状部43Bに設けられる。第1の軸状部M1及び第2の軸状部M2は、接触面430において相互に接触する。
The first shaft portion M1 is fixed to the first diaphragm 41, and the second shaft portion M2 is fixed to the second diaphragm 42. A coupling hole 43a coupled to the eccentric member 44 via the bearing 45 is provided in the second shaft portion 43B. The first shaft portion M1 and the second shaft portion M2 are in contact with each other on the contact surface 430.
ポンプ装置3Bの運転時、第1の軸状部M1及び第2の軸状部M2は、相互に一体的に本体30の内部を往復移動する。したがって本実施形態においても上述の第1の実施形態と同様の作用効果を得ることができる。
During the operation of the pump device 3B, the first shaft portion M1 and the second shaft portion M2 reciprocate within the main body 30 integrally with each other. Therefore, also in this embodiment, it is possible to obtain the same function and effect as those of the first embodiment.
<第3の実施形態>
図5は、本発明の第3の実施形態に係るポンプ装置の構成を示す断面図である。以下、第1の実施形態と異なる構成について主に説明し、上述の実施形態と同様の構成については同様の符号を付しその説明を省略または簡略化する。 <Third Embodiment>
FIG. 5 is a cross-sectional view showing a configuration of a pump device according to the third embodiment of the present invention. Hereinafter, configurations different from those of the first embodiment will be mainly described, and configurations similar to those of the above-described embodiment will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
図5は、本発明の第3の実施形態に係るポンプ装置の構成を示す断面図である。以下、第1の実施形態と異なる構成について主に説明し、上述の実施形態と同様の構成については同様の符号を付しその説明を省略または簡略化する。 <Third Embodiment>
FIG. 5 is a cross-sectional view showing a configuration of a pump device according to the third embodiment of the present invention. Hereinafter, configurations different from those of the first embodiment will be mainly described, and configurations similar to those of the above-described embodiment will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
本実施形態のポンプ装置3Cは、燃料電池システム100における循環ポンプ3として適用可能である。本実施形態では、本体30の入口31に逆止弁V3(第2の逆止弁)が配置されている点で、上述の第1の実施形態と異なる。
The pump device 3C according to the present embodiment is applicable as the circulation pump 3 in the fuel cell system 100. This embodiment differs from the first embodiment described above in that a check valve V3 (second check valve) is disposed at the inlet 31 of the main body 30.
逆止弁V3は、入口31(貯湯タンク2)から第1のポンプ室P1への方向の液連通を許容するが、それとは逆方向への液連通を禁止する機能を有する。逆止弁V2には種々のチェックバルブが採用可能であり、本実施形態ではダックビル弁が用いられる。
The check valve V3 allows liquid communication in the direction from the inlet 31 (hot water storage tank 2) to the first pump chamber P1, but has a function of prohibiting liquid communication in the opposite direction. Various check valves can be used as the check valve V2, and a duckbill valve is used in this embodiment.
本実施形態のポンプ装置3Cにおいても上述の第1の実施形態と同様の作用効果を得ることができる。また本実施形態によれば、入口31に逆止弁V3が配置されているため、第1のポンプ室P1における加圧水を入口31側へ逆流させることなく第2のポンプ室P2及び出口32側へ安定して送出することができる。これにより、各ポンプ室P1,P2におけるポンプ水を効率よく吐出することできるため、流量が安定化し、ポンプ装置の運転効率も高めることができる。
Also in the pump device 3C of the present embodiment, the same operational effects as those of the first embodiment described above can be obtained. Further, according to the present embodiment, since the check valve V3 is disposed at the inlet 31, the pressurized water in the first pump chamber P1 does not flow back to the inlet 31 side, but to the second pump chamber P2 and outlet 32 side. It can be sent out stably. Thereby, since the pump water in each pump chamber P1, P2 can be discharged efficiently, a flow volume is stabilized and the operating efficiency of a pump apparatus can also be improved.
以上、本発明の実施形態について説明したが、本発明は上述の実施形態にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。
As mentioned above, although embodiment of this invention was described, this invention is not limited only to the above-mentioned embodiment, Of course, in the range which does not deviate from the summary of this invention, a various change can be added.
以上の実施形態では、給湯システムとして燃料電池システムを例に挙げて説明したが、これに代えて、ヒートポンプや太陽電池、ガスエンジンなどの他の発電機構を用いた給湯システムにおいて熱源により加温される水を貯留可能な貯湯タンクを備えていれば、本発明は適用可能である。
In the above embodiment, the fuel cell system has been described as an example of the hot water supply system. Instead, the hot water supply system is heated by a heat source in a hot water supply system using another power generation mechanism such as a heat pump, a solar battery, or a gas engine. The present invention is applicable as long as a hot water storage tank capable of storing water is provided.
また以上の各実施形態では、循環ポンプ3を構成するポンプ装置3A~3Cをダイヤフラムポンプで構成したが、これに代えて、例えばプランジャポンプで構成されてもよい。
Further, in each of the above embodiments, the pump devices 3A to 3C constituting the circulation pump 3 are constituted by diaphragm pumps. However, instead of this, for example, a plunger pump may be constituted.
また以上の第3の実施形態では、ポンプの入口側に逆止弁V3を配置した例を説明したが、これに加えて、例えば図6に示すような逆止弁V4を第2の本体部302の出力ポート302b内に配置してもよい。逆止弁V4は、第1のポンプ室P1から第2のポンプ室P2への方向の液連通を許容するが、それとは逆方向への液連通を禁止する機能を有する。このような構成によっても上述の第3の実施形態と同様の作用効果を得ることができる。
In the third embodiment described above, the example in which the check valve V3 is arranged on the inlet side of the pump has been described. In addition to this, for example, the check valve V4 as shown in FIG. You may arrange | position in the output port 302b of 302. FIG. The check valve V4 has a function of permitting liquid communication in the direction from the first pump chamber P1 to the second pump chamber P2, but prohibiting liquid communication in the opposite direction. Even with such a configuration, the same operational effects as those of the third embodiment described above can be obtained.
1…燃料電池ユニット
2…貯湯タンク
3,3A,3B,3C…循環ポンプ(ポンプ装置)
15…排熱回収部
30…本体
31…入口
32…出口
40…駆動機構
41…第1のダイヤフラム
42…第2のダイヤフラム
43…軸状部材
44…偏心部材
47…付勢部材
50…通路部
100…燃料電池システム
P1…第1のポンプ室
P2…第2のポンプ室
V1,V2,V3,V4…逆止弁 DESCRIPTION OFSYMBOLS 1 ... Fuel cell unit 2 ... Hot water storage tank 3, 3A, 3B, 3C ... Circulation pump (pump apparatus)
DESCRIPTION OFSYMBOLS 15 ... Waste heat recovery part 30 ... Main body 31 ... Inlet 32 ... Outlet 40 ... Drive mechanism 41 ... 1st diaphragm 42 ... 2nd diaphragm 43 ... Shaft-shaped member 44 ... Eccentric member 47 ... Energizing member 50 ... Passage part 100 ... fuel cell system P1 ... first pump chamber P2 ... second pump chamber V1, V2, V3, V4 ... check valves
2…貯湯タンク
3,3A,3B,3C…循環ポンプ(ポンプ装置)
15…排熱回収部
30…本体
31…入口
32…出口
40…駆動機構
41…第1のダイヤフラム
42…第2のダイヤフラム
43…軸状部材
44…偏心部材
47…付勢部材
50…通路部
100…燃料電池システム
P1…第1のポンプ室
P2…第2のポンプ室
V1,V2,V3,V4…逆止弁 DESCRIPTION OF
DESCRIPTION OF
Claims (9)
- 熱源と、
前記熱源で加温される水を貯留可能な貯湯タンクと、
前記貯湯タンク内の水を前記熱源と前記貯湯タンクとの間で循環させることが可能な循環ポンプとを具備し、
前記循環ポンプは、
前記貯湯タンクに接続され前記貯湯タンク内の水が流入する入口と、前記熱源に接続される出口と、前記入口と連通する第1のポンプ室と、前記出口と連通する第2のポンプ室とを有する本体と、
前記第1のポンプ室に臨む第1の可動部と、前記第2のポンプ室に臨む第2の可動部とを有し、前記第1及び第2の可動部をそれぞれ前記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能な駆動機構と、
前記第1のポンプ室と前記第2のポンプ室との間に接続され、前記第1のポンプ室から前記第2のポンプ室への液連通を可能とする通路部と、を有する
給湯システム。 A heat source,
A hot water storage tank capable of storing water heated by the heat source;
A circulation pump capable of circulating water in the hot water storage tank between the heat source and the hot water storage tank;
The circulation pump is
An inlet connected to the hot water tank and into which water in the hot water tank flows, an outlet connected to the heat source, a first pump chamber communicating with the inlet, and a second pump chamber communicating with the outlet; A body having
A first movable part that faces the first pump chamber; and a second movable part that faces the second pump chamber, wherein the first and second movable parts are the first and second parts, respectively. A drive mechanism capable of reciprocating so that the pump operation cycles are in opposite phases with each other in the pump chamber,
A hot water supply system, comprising: a passage portion connected between the first pump chamber and the second pump chamber and enabling liquid communication from the first pump chamber to the second pump chamber. - 請求項1に記載の給湯システムであって、
前記第1のポンプ室内における前記第1の可動部の受圧面積は、前記第2のポンプ室内における前記第2の可動部の受圧面積と同一である
給湯システム。 The hot water supply system according to claim 1,
The pressure receiving area of the first movable part in the first pump chamber is the same as the pressure receiving area of the second movable part in the second pump chamber. - 請求項1又は2に記載の給湯システムであって、
前記通路部は、前記第1のポンプ室から前記第2のポンプ室への方向の液連通を許容しそれとは逆方向への液連通を禁止する第1の逆止弁を有する
給湯システム。 The hot water supply system according to claim 1 or 2,
The passage section includes a first check valve that allows liquid communication in the direction from the first pump chamber to the second pump chamber and prohibits liquid communication in the opposite direction. - 請求項1から3のいずれか1つに記載の給湯システムであって、
前記本体は、前記貯湯タンクから前記第1のポンプ室への方向の液連通を許容しそれとは逆方向への液連通を禁止する、前記入口に配置された第2の逆止弁をさらに有する
給湯システム。 The hot water supply system according to any one of claims 1 to 3,
The main body further includes a second check valve disposed at the inlet that allows liquid communication in the direction from the hot water storage tank to the first pump chamber and prohibits liquid communication in the opposite direction. Hot water system. - 請求項1から4のいずれか1つに記載の給湯システムであって、
前記第1の可動部は、前記第1のポンプ室を区画する第1のダイヤフラムで構成され、
前記第2の可動部は、前記第2のポンプ室を区画する第2のダイヤフラムで構成され、
前記駆動機構は、前記第1のダイヤフラムに固定される第1の端部と、前記第2のダイヤフラムに固定される第2の端部とを有する軸状部材をさらに有する
給湯システム。 A hot water supply system according to any one of claims 1 to 4,
The first movable part is composed of a first diaphragm that partitions the first pump chamber,
The second movable part is composed of a second diaphragm that partitions the second pump chamber,
The drive mechanism further includes a shaft member having a first end fixed to the first diaphragm and a second end fixed to the second diaphragm. - 請求項5に記載の給湯システムであって、
前記駆動機構は、
回転軸を有するモータと、
前記回転軸と前記軸状部材との間に接続され、前記回転軸の回転運動を前記軸状部材の往復運動に変換する偏心部材と、
前記第1のダイヤフラムと前記第2のダイヤフラムとの間に形成され、前記軸状部材のその軸方向への直線移動を案内するガイド面と、をさらに有する
給湯システム。 The hot water supply system according to claim 5,
The drive mechanism is
A motor having a rotating shaft;
An eccentric member connected between the rotating shaft and the shaft-shaped member, and converting a rotational motion of the rotating shaft into a reciprocating motion of the shaft-shaped member;
A hot water supply system, further comprising: a guide surface formed between the first diaphragm and the second diaphragm for guiding linear movement of the shaft-shaped member in the axial direction. - 請求項5又は6に記載の給湯システムであって、
前記駆動機構は、前記第1及び第2のポンプ室のうち何れか一方へ前記軸状部材を付勢する付勢部材をさらに有する
給湯システム。 The hot water supply system according to claim 5 or 6,
The drive mechanism further includes a biasing member that biases the shaft-shaped member toward one of the first and second pump chambers. - 燃料電池により発電する燃料電池ユニットと、
前記燃料電池ユニットの発電で発生した排熱を熱源として加温される水を貯留可能な貯湯タンクと、
前記貯湯タンク内の水を前記燃料電池ユニットと前記貯湯タンクとの間で循環させることが可能な循環ポンプとを具備し、
前記循環ポンプは、
前記貯湯タンクに接続され前記貯湯タンク内の水が流入する入口と、前記燃料電池ユニットに接続される出口と、前記入口と連通する第1のポンプ室と、前記出口と連通する第2のポンプ室とを有する本体と、
前記第1のポンプ室に臨む第1の可動部と、前記第2のポンプ室に臨む第2の可動部とを有し、前記第1及び第2の可動部をそれぞれ前記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能な駆動機構と、
前記第1のポンプ室と前記第2のポンプ室との間に接続され、前記第1のポンプ室から前記第2のポンプ室への液連通を可能とする通路部と、を有する
燃料電池システム。 A fuel cell unit for generating electricity from the fuel cell;
A hot water storage tank capable of storing water that is heated by using exhaust heat generated by power generation of the fuel cell unit as a heat source;
A circulation pump capable of circulating water in the hot water storage tank between the fuel cell unit and the hot water storage tank;
The circulation pump is
An inlet connected to the hot water storage tank and into which water in the hot water storage tank flows, an outlet connected to the fuel cell unit, a first pump chamber communicating with the inlet, and a second pump communicating with the outlet A body having a chamber;
A first movable part that faces the first pump chamber; and a second movable part that faces the second pump chamber, wherein the first and second movable parts are the first and second parts, respectively. A drive mechanism capable of reciprocating so that the pump operation cycles are in opposite phases with each other in the pump chamber,
A fuel cell system comprising: a passage portion connected between the first pump chamber and the second pump chamber and enabling fluid communication from the first pump chamber to the second pump chamber. . - 液体が流入する入口と、前記入口に流入した液体を吐出する出口と、前記入口と連通する第1のポンプ室と、前記出口と連通する第2のポンプ室とを有する本体と、
前記第1のポンプ室に臨む第1の可動部と、前記第2のポンプ室に臨む第2の可動部とを有し、前記第1及び第2の可動部をそれぞれ前記第1及び第2のポンプ室内で相互にポンプ作動サイクルが逆位相となるように往復させることが可能な駆動機構と、
前記第1のポンプ室と前記第2のポンプ室との間に接続され、前記第1のポンプ室から前記第2のポンプ室への液連通を可能とする通路部と
を具備するポンプ装置。 A main body having an inlet through which liquid flows, an outlet through which the liquid flowing into the inlet is discharged, a first pump chamber in communication with the inlet, and a second pump chamber in communication with the outlet;
A first movable part that faces the first pump chamber; and a second movable part that faces the second pump chamber, wherein the first and second movable parts are the first and second parts, respectively. A drive mechanism capable of reciprocating so that the pump operation cycles are in opposite phases with each other in the pump chamber,
A pump device comprising: a passage portion connected between the first pump chamber and the second pump chamber and enabling fluid communication from the first pump chamber to the second pump chamber.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-143208 | 2013-07-09 | ||
JP2013143208A JP2015017505A (en) | 2013-07-09 | 2013-07-09 | Hot water supply system, fuel battery system, and pump apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015005264A1 true WO2015005264A1 (en) | 2015-01-15 |
Family
ID=52279946
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/068022 WO2015005264A1 (en) | 2013-07-09 | 2014-07-07 | Hot water supply system, fuel cell system, and pump device |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2015017505A (en) |
WO (1) | WO2015005264A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7011935B2 (en) * | 2017-12-21 | 2022-01-27 | 株式会社豊田中央研究所 | Gas-liquid separator |
JP7335746B2 (en) * | 2019-07-22 | 2023-08-30 | 東京瓦斯株式会社 | fuel cell system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59160872U (en) * | 1983-04-14 | 1984-10-27 | 株式会社ノーリツ | 2 stage diaphragm pump |
JPH08270567A (en) * | 1995-03-31 | 1996-10-15 | Iwaki:Kk | Diaphragm type fluid supplying device |
JP2002013479A (en) * | 2000-06-28 | 2002-01-18 | Tacmina Corp | Reciprocating pump |
WO2008101517A1 (en) * | 2007-02-22 | 2008-08-28 | Gardner Denver Thomas Gmbh | Multiple connection pump having noise reducing valve and bearing coupling |
WO2011052233A1 (en) * | 2009-11-02 | 2011-05-05 | パナソニック株式会社 | Fuel cell cogeneration system |
-
2013
- 2013-07-09 JP JP2013143208A patent/JP2015017505A/en active Pending
-
2014
- 2014-07-07 WO PCT/JP2014/068022 patent/WO2015005264A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59160872U (en) * | 1983-04-14 | 1984-10-27 | 株式会社ノーリツ | 2 stage diaphragm pump |
JPH08270567A (en) * | 1995-03-31 | 1996-10-15 | Iwaki:Kk | Diaphragm type fluid supplying device |
JP2002013479A (en) * | 2000-06-28 | 2002-01-18 | Tacmina Corp | Reciprocating pump |
WO2008101517A1 (en) * | 2007-02-22 | 2008-08-28 | Gardner Denver Thomas Gmbh | Multiple connection pump having noise reducing valve and bearing coupling |
WO2011052233A1 (en) * | 2009-11-02 | 2011-05-05 | パナソニック株式会社 | Fuel cell cogeneration system |
Also Published As
Publication number | Publication date |
---|---|
JP2015017505A (en) | 2015-01-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7438535B2 (en) | Structure of ejector pump | |
EP2280441B1 (en) | Fuel cell system | |
CA2513650C (en) | Fuel cartridge for fuel cells | |
JP4732008B2 (en) | Reforming apparatus and fuel cell system using the same | |
WO2010113548A1 (en) | Fuel cell system | |
US20160024666A1 (en) | Electrochemical compressor utilizing an electrolysis | |
CN102195050A (en) | Fuel cell system | |
WO2015005264A1 (en) | Hot water supply system, fuel cell system, and pump device | |
CN104428935A (en) | Fuel cell system | |
US20200274177A1 (en) | Fuel cell system and hydrogen circulation pump | |
US20100278665A1 (en) | Fixation structure for compressor | |
JP6617685B2 (en) | Ion exchanger | |
JP2008159467A (en) | Fuel cell device | |
JP2008020039A (en) | Pressure control valve | |
US20090317687A1 (en) | Mixing pump device and fuel cell | |
KR101078964B1 (en) | fuel cell system | |
JP5900045B2 (en) | Oxidant gas supply pipe member and fuel cell system including the same | |
US20060083960A1 (en) | Fuel cell system | |
JP5231932B2 (en) | Fuel cell cooling system | |
KR101396882B1 (en) | Fuel cell system, cooling method thereof, and vehicle having the fuel cell system | |
CN1753224A (en) | Fuel tank, fuel cell system, and hydrogen gas generator | |
JP5598249B2 (en) | Fuel cell system | |
US20200168924A1 (en) | Hydrogen circulation pump for fuel cell system and fuel cell system | |
JP4673033B2 (en) | Fuel cell mounted device and fuel cartridge for fuel cell | |
JP5049197B2 (en) | Valve device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14822966 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 14822966 Country of ref document: EP Kind code of ref document: A1 |