JP4295683B2 - Hot water supply system - Google Patents

Description

  The present invention relates to a hot water supply heat source system including a cogeneration hot water supply heat source device that supplies hot water accumulated in a hot water storage tank to a hot water supply destination using exhaust heat of a power generation device such as a polymer electrolyte fuel cell (PEFC). It is.

  In recent years, as a system capable of achieving an energy saving effect, for example, a cogeneration hot water supply heat source device that supplies hot water accumulated in a hot water storage tank to a hot water supply destination using waste heat of a power generation device such as a polymer electrolyte fuel cell It has been proposed (see, for example, Patent Document 1).

  FIG. 6 shows an example of a cogeneration hot water supply heat source device. The cogeneration hot water supply heat source device 3 includes a power generation device 1 and a hot water storage tank 2, and the hot water storage tank 2 introduces water into the hot water storage tank 2 and a hot water supply path 12 that supplies hot water from the hot water storage tank 2. It has. A hot water temperature detection sensor 100 is provided in the hot water supply path 12.

  Between the hot water storage tank 2 and the power generation device 1, a cooling water introduction passage 13 and a waste hot water introduction passage 14 are provided. The cooling water introduction passage 13 uses the water in the hot water storage tank 2 as cooling water for the power generation device 1. The water is introduced into the power generation device 1 side and heated by exhaust heat generated during power generation by the power generation device 1 to form hot water having a temperature of, for example, 60 ° C., and is accumulated in the hot water storage tank 2 through the exhaust heat hot water introduction passage 14. That is, the cooling water introduction passage 13 and the exhaust hot water introduction passage 14 form a means for heating the water in the hot water storage tank 2 by the exhaust heat of the power generator 1 to make hot water.

  A drainage passage 15 for draining the water in the hot water tank 2 is provided below the hot water tank 2, and a drain valve 52 is provided in the drainage passage 15. A pressure relief passage 16 is provided above the hot water storage tank 2, and an overpressure relief valve 50 is provided in the pressure relief passage 16. The hot water tank 2 is usually filled with hot water or water. In this figure, the region filled with hot water is indicated by hatching in order to make the drawing easy to understand.

  In the cogeneration hot water supply heat source device 3, when the power generation device 1 is activated, water stored in the lower part of the hot water tank 2 is introduced into the power generation device 1 through the cooling water introduction passage 13, and is discharged when the power generation device 1 generates power. The hot water is heated to be hot water, and this hot water is introduced into the hot water tank 2 from the upper side of the hot water tank 2 through the exhaust hot water introduction passage 14. When this operation is repeated, the water on the lower side of the hot water tank 2 is made hot by the exhaust heat of the power generator 1 and introduced into the upper side of the hot water tank 2, so that the hot water tank 2 shown by the broken line A in FIG. The boundary line between the water and hot water inside moves to the lower side of the hot water tank 2.

  Note that if the hot water tank 2 is completely filled with hot water, the cooling power cannot be introduced into the power generation device 1, so that the power generation by the power generation device 1 cannot be performed.

  Further, when the hot water in the hot water tank 2 is supplied to an appropriate hot water supply place through the hot water supply path 12, water is supplied into the hot water tank 2 from the water supply pipe 11 by the amount of hot water reduced by this water supply. The boundary line between the hot water and the hot water in the hot water tank 2 indicated by the broken line A in FIG.

  The cogeneration hot water supply heat source device 3 as described above is often used in combination with, for example, an auxiliary hot water supply heat source device including a hot water heater. When the auxiliary hot water supply heat source device and the cogeneration hot water supply heat source device 3 are provided side by side, a combined hot water supply heat source system is formed.

JP2003-120998

  By the way, in the hot water supply system having the cogeneration hot water supply apparatus 3 as described above, it is necessary to periodically discharge the dirt accumulated in the hot water storage tank 2. Therefore, conventionally, the user operates the drain plug to discharge the hot water in the hot water tank 2, but this is not always executed. Therefore, dirt in the tank is not discharged, and there is a problem that hygiene problems and dirt flow from the hot water storage tank 2 through the hot water supply passage and cause malfunction of valves.

  The present invention has been made to solve the above conventional problems, and its purpose is to prevent troubles caused by dirt in the hot water storage tank of the cogeneration hot water supply heat source device and to use it hygienically by the user. An object of the present invention is to provide a hot water supply heat source system that can be used.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the first invention is an integer multiple of one day (1 or more) in a hot water supply heat source system including a cogeneration hot water supply heat source device that supplies hot water accumulated in a hot water storage tank to a hot water supply destination using exhaust heat of the power generator. Hot water use that detects hot water usage data for each time on the time axis for each set period based on information on the hot water flow rate obtained from the flow sensor and time information obtained from the clock mechanism The detection data detected by the amount data detection unit and the hot water use amount data detection unit are accumulated, and the relationship between the time on the time axis and the hot water use amount for each set period is based on the accumulated data. Hot water usage-related data learning storage unit that learns and stores, a power generation device operation status detection unit that detects the operation status of the power generation device, information and time obtained from the power generation device operation status detection unit A power usage data detection unit that detects power usage data using the power generator for each time on the time axis for each set period based on time information obtained from a mechanism; and the power usage data The amount of power used for accumulating the detection data detected by the detection unit, and learning and storing the relationship between the time on the time axis for each set period and the amount of power used for the power generation device based on the accumulated data as power usage amount relationship data The hot water supply usage amount for each time on the time axis for each set cycle is equal to or less than a predetermined hot water supply set value with reference to the relationship data learning storage unit, the hot water supply usage amount relationship data, and the power usage amount relationship data, and A drainage time setting unit for setting the drainage time of hot water in the hot water tank at a time within a period in which the amount of power used for each time on the time axis for each set cycle is equal to or less than a predetermined power set value; When it reaches the drainage time set by drainage time setting unit, and a means for solving the problems with the construction having drainage operation promoting display unit for performing display to prompt the hot water drainage operation of the hot water storage tank.

  A second aspect of the present invention is a hot water supply heat source system including a cogeneration hot water supply heat source device that supplies hot water accumulated in a hot water storage tank to a hot water supply destination using exhaust heat of the power generation device. A solenoid valve and a drainage passage are provided, and data on the amount of hot water used for each time on the time axis for each set cycle with an integer multiple of a day (an integer multiple of 1) as a cycle can be obtained from the flow sensor. Hot water use amount data detection unit that is detected based on information on the hot water flow rate and time information obtained from the clock mechanism, and the set cycle based on the accumulated data by accumulating detection data detected by the hot water use amount data detection unit Hot water use amount relation data learning storage unit for learning and storing the relationship between the time on the time axis and the hot water use amount for each hot water use amount relation data, and the power generation device operation state for detecting the operation state of the power generation device Based on the output unit, the information obtained from the power generation device operating status detection unit and the time information obtained from the clock mechanism, the amount of power usage using the power generation device for each time on the time axis for each set period A power usage data detection unit for detecting data, and detection data detected by the power usage data detection unit are accumulated, based on the accumulated data, time on the time axis for each set period and power usage using the power generator A power usage amount relationship data learning storage unit that learns and stores a relationship with the amount as power usage amount relationship data, each of the hot water usage amount relationship data and the power usage amount relationship data with reference to the time axis for each set period Within a period in which the amount of hot water used for the time is less than or equal to a predetermined hot water supply set value and the amount of power used for each time on the time axis for each set period is less than or equal to the predetermined power set value A drainage time setting unit that sets the drainage time of hot water in the hot water tank every time, and the drainage solenoid valve is opened at the drainage time set by the drainage time setting part to automatically drain hot water in the hot water tank from the drainage passage. The automatic drainage executing unit is configured to solve the problem.

  Furthermore, in addition to the configuration of the second invention, the third invention closes the drain electromagnetic valve and performs the automatic drainage when hot water supply using the hot water storage tank as a heat source is performed during drainage by the automatic drainage execution unit. A configuration having a drainage stopping unit that stops the draining operation by the unit is a means for solving the problem.

  Furthermore, in addition to the configuration of the first, second, or third invention, the fourth invention includes a hot water storage tank of the cogeneration hot water supply heat source device that includes a water supply channel and a hot water storage tank for introducing water supply into the hot water storage tank. A hot water supply passage for supplying hot water is provided, and between the hot water storage tank and the power generator, the water in the hot water tank is heated by using the exhaust heat of the power generator or the heat of the exhaust heat absorbing fluid of the power generator. As a means for solving the problems, a configuration is provided in which a means is provided, the hot water formed by the means is accumulated in a hot water storage tank, and the hot water in the hot water storage tank is supplied to the hot water supply destination through the hot water supply passage. Yes.

  Furthermore, the fifth invention is an auxiliary hot water supply heat source having a function of supplying hot water prepared by heating the water flow to the hot water supply destination in addition to the configuration of any one of the first to fourth inventions. The apparatus is provided with a cogeneration hot water supply heat source device, and a passage of hot water supplied from the hot water storage tank of the cogeneration hot water supply heat source device is connected to a water supply inlet of the auxiliary hot water supply heat source device, and the hot water of the hot water storage tank is used as a heat source. As a means for solving the problem, the hot water in the hot water storage tank is supplied to the hot water supply destination through the auxiliary hot water supply heat source device in a non-heated drive state.

  Furthermore, the sixth invention solves the problem with the structure of any one of the first to fifth inventions, in which the power generating device is a fuel cell that generates electricity by reacting hydrogen and oxygen. As a means.

  Furthermore, the seventh invention is configured in addition to the configuration of any one of the second to sixth inventions, wherein the automatic drainage execution unit automatically drains the hot water in the hot water tank into the bathtub. As a means to solve the problem.

  According to the present invention, the relationship between the time on the time axis for each set period and the amount of hot water used is learned and stored as the hot water use amount relation data, and the time on the time axis for each set period and the power usage using the power generator The amount of hot water used for each time on the time axis for each set cycle is determined in advance by learning and storing the relationship with the amount as power usage amount related data and referring to the hot water usage amount relationship data and the power usage amount relationship data. The hot water drainage time in the hot water tank is set at a time within a period in which the amount of power used for each time on the time axis for each set cycle is equal to or less than a predetermined power set value. The drainage time can be set at an appropriate time when both the amount of hot water used and the amount of power used are small.

  And in the present invention, when the drainage time set by the drainage time setting unit is reached, according to the configuration provided with the drainage operation promotion display unit that performs a display prompting the drainage operation of the hot water in the hot water tank, It is possible to prompt the user to drain the hot water in the hot water tank at an appropriate drainage time, so that the user can keep the hot water in the hot water tank hygienic by performing the drainage operation at the drainage time. it can.

  Further, in the present invention, according to the configuration in which the hot water in the hot water tank is automatically drained by the automatic drainage execution unit at the drain time set by the drain time setting unit, the user is careful about the drain time in the hot water tank. Even if it is not over, the hot water in the hot water tank can be kept hygienic.

  Furthermore, in the present invention, when hot water supply using a hot water storage tank as a heat source is performed during drainage by the automatic drainage execution unit, the drainage stop unit closes the drainage electromagnetic valve and stops the drainage operation by the automatic drainage execution unit According to the above, even if hot water is used differently from normal and hot water is supplied during automatic drainage operation, the drainage operation is stopped at that time, which may cause problems in hot water supply in the hot water storage tank. Can be suppressed.

  Furthermore, in the present invention, hot water formed by means provided between the hot water storage tank of the cogeneration hot water supply heat source device and the power generation device is accumulated in the hot water storage tank, and the hot water of this hot water storage tank is provided in the hot water storage tank. According to the configuration of supplying to the hot water supply destination through the hot water supply path, hot water accumulation by the cogeneration hot water supply heat source device and hot water supply from the hot water storage tank can be performed efficiently.

  Furthermore, in the present invention, an auxiliary hot water supply heat source device having a function of supplying hot water created by heating water to the hot water supply destination is provided together with the cogeneration hot water supply heat source device, and the hot water storage of the cogeneration hot water supply heat source device The passage of hot water supplied from the tank is connected to the water supply introduction port of the auxiliary hot water supply heat source device. According to the configuration of supplying hot water to the hot water supply destination, the system configuration can be simplified by communicating the passage of hot water fed from the hot water storage tank of the cogeneration hot water source and the water inlet of the auxiliary hot water source. Hot water can be efficiently supplied.

  Furthermore, in the present invention, according to the configuration in which the power generation device is a fuel cell that reacts hydrogen and oxygen to generate electricity, by using the power generation device as a fuel cell, a substance that adversely affects the environment is not discharged. Since the cogeneration hot water supply heat source device can be operated, an environmentally friendly hot water supply heat source system can be constructed.

  Furthermore, in the present invention, the automatic drainage execution unit automatically drains the hot water in the hot water tank, and the drainage destination is in the bathtub. By using the drainage in the bathtub, water is not wasted and used. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 2 shows a system configuration of an embodiment of a hot water supply apparatus according to the present invention, and FIG. 1 shows a control configuration thereof. As shown in FIG. 2, the present embodiment heats the water of the cogeneration hot water supply heat source device 3 that supplies the hot water accumulated in the hot water storage tank 2 to the hot water supply destination using the exhaust heat of the power generation device 1, and the water that passes through the water. This is a combined hot water supply system with an auxiliary hot water supply heat source device 4 for supplying hot water prepared in this manner to a hot water supply destination. In addition, in the cogeneration hot water supply heat source apparatus 3, the overlapping description about the same structure as FIG. 6 is abbreviate | omitted or simplified.

The power generator 1 applied in the present embodiment is formed by a fuel cell such as a polymer electrolyte fuel cell (PEFC), for example, and is extracted from a fuel such as city gas by the reverse reaction of water electrolysis. This is a device for generating electricity by reacting the generated hydrogen 2H ⁺ with oxygen (1/2) O ₂ in the air.

  The system having the cogeneration hot water supply heat source device 3 is attracting attention as a system capable of producing an energy saving effect. In the present embodiment, the power generation device 1 is particularly formed by a fuel cell, thereby adversely affecting the environment. The cogeneration hot water supply heat source device 3 can be operated without discharging the substance to be given, and an environmentally friendly hot water supply device can be constructed.

  In the present embodiment, the capacity of the hot water tank 2 is, for example, 200 L, and the hot water tank 2 is provided with hot water temperature detection sensors 101 to 111 in the hot water tank at intervals. The drain valve 52 provided on the lower side of the hot water tank 2 is a drain solenoid valve. The drain electromagnetic valve 52 can be opened / closed automatically by the control in the control device 44, and can be opened / closed by the user operating the operation part of the drain electromagnetic valve 52.

  In the present embodiment example, the cogeneration hot water supply heat source device 3 and the auxiliary hot water supply heat source device 4 are connected to the hot water mixing unit 10 via the connection passage 45, and the outlet side of the hot water supply path 12 of the cogeneration hot water supply heat source device 3. Is provided with a flow rate sensor 70 for detecting the flow rate of hot water fed from the hot water supply passage 12. Further, a branch passage 11 b of the water supply passage 11 is connected to the hot water / mixing unit 10. A water supply temperature sensor 112 is provided in the water supply path 11.

  The hot water mixing unit 10 is supplied with water from the water supply path 11, a hot water on / off valve 54 that opens and closes the hot water supply path 12, a hot water proportional valve 55 that variably controls the flow rate of hot water supplied from the hot water supply path 12 according to the valve opening degree. And a flow rate sensor 71 provided on the inlet side of the connection passage 45. The hot water on / off valve 54 is an electromagnetic valve, and the hot water proportional valves 55 and 56 are both formed by a gear motor. A hot water temperature detection sensor 120 is provided on the outlet side of the hot water supply passage 12, and a hot water temperature detection sensor 118 is provided on the inlet side of the connection passage 45.

  The auxiliary hot water supply heat source device 4 is a device having a function of supplying hot water prepared by heating water flowing through water to a hot water supply destination, and has a hot water heater 5 (5a, 5b). The water heater 5 (5a, 5b) has combustion chambers 23, 24, respectively. In the combustion chamber 23 of the water heater 5 a, a burner 6, a combustion fan 8 that supplies and exhausts combustion of the burner 6, and a hot water supply heat exchanger 19 that is heated by the combustion of the burner 6 are provided. Further, in the combustion chamber 24 of the water heater 5b, a burner 7, a combustion fan 9 for supplying and exhausting combustion of the burner 7, and a reheating heat exchanger 25 heated by the combustion of the burner 7 are provided. Yes.

  Gas pipes 21 and 22 for supplying fuel to the burners 6 and 7 are connected to the burners 6 and 7, and these gas pipes 21 and 22 are branched from the gas pipe 20. The gas pipe 20 is provided with a gas on / off valve 80, the gas pipe 21 has a gas proportional valve 86 and gas on / off valves 81, 82, and 83, and the gas pipe 22 has a gas proportional valve 87 and a gas on the gas pipe 22. On-off valves 84 and 85 are interposed, respectively. These valves 80 to 87 are all formed by electromagnetic valves, the gas on-off valves 80 to 85 control the fuel supply / stop to the corresponding burners 6 and 7, and the gas proportional valves 86 and 87 correspond to the corresponding valves. The amount of fuel supplied to the burners 6 and 7 is controlled by the valve opening.

  A water supply introduction passage 18 is provided on the inlet side of the hot water heat exchanger 19, and this water supply introduction passage 18 is connected to the connection passage 45. A flow rate sensor 73 that detects the amount of hot water flowing through the water supply introduction passage 18 is provided on the inlet side of the water supply introduction passage 18.

  A hot water supply passage 26 is provided on the outlet side of the hot water supply heat exchanger 19, and the front end side of the hot water supply passage 26 is connected to the water supply introduction passage 18 via a branch passage 90 and a hot water passage switching valve 58. In the hot water supply passage 26, a hot water temperature detection sensor 113 is provided on the downstream side of the branch portion of the branch passage 90, and a hot water temperature detection sensor 114 is provided on the hot water supply heat exchanger 19 side. An overheat prevention device (thermostat) 115 is provided in the middle of the hot water supply heat exchanger 19.

  One end side of the forward pipe 91 is connected to one end side of the reheating heat exchanger 25, and the other end side of the forward pipe 91 is connected to the bathtub 126 via a circulation fitting 97. Further, a passage 93 is connected to the other end side of the reheating heat exchanger 25, and the other end side of the passage 93 is connected to a discharge port of the circulation pump 94. One end side of the return pipe 96 is connected to the suction port of the circulation pump 94, and the other end side of the return pipe 96 is connected to the bathtub 126 through the circulation fitting 97. The return pipe 96 is provided with a bathtub hot water temperature detection sensor 127.

  Reheating for recirculating hot water in the bathtub by circulating the hot water in the bathtub 126 by driving the circulation pump 94 by the outgoing pipe 91, the reheating heat exchanger 25, the passage 93, the circulation pump 94, and the return pipe 96. A circulation passage 99 is formed.

  Also, the hot water supply passage 26 is provided downstream of the formation portion of the branch passage 90 and the arrangement portion of the tapping hot water temperature detection sensor 113, and the pouring introduction passage for bath as a hot water supply passage from the hot water supply source to the bathtub 126. 95 is connected, and the bath pouring introduction passage 95 is connected to the passage 93. The bath pouring introduction passage 95 is provided with a hot water on / off valve 59, a check valve 62, a flow rate sensor 74, and a water level sensor 125. The water level sensor 125 detects the water level of the bathtub 126 by water pressure.

  A hot water filling passage is constituted by the passage from the hot water supply heat exchanger 19 through the hot water supply passage 26, the bath pouring introduction passage 95, the passage 93, the reheating heat exchanger 25, and the outgoing pipe 91 to the bathtub 126 in this order. ing.

  In FIG. 2, a hot water supply place such as a kitchen and a bathtub 126 are shown as hot water supply destinations, but various hot water supply systems that supply hot water to appropriate hot water supply destinations such as a bathroom shower can be configured.

  The system configuration of this embodiment is configured as described above. Next, the control configuration of the control device 44 shown in FIG. 1 will be described. The control device 44 includes a heat storage amount detection unit 35, a selection control unit 36, a combustion control unit 42, a clock mechanism 41, a hot water supply usage amount data detection unit 37, a hot water supply usage amount related data learning storage unit 38, and a power generator operating state detection unit 47. , A power usage amount data detection unit 39, a power usage amount related data learning storage unit 43, a drainage time setting unit 49, an automatic drainage execution unit 40, and a drainage stop unit 34, which are connected to the drainage operation promotion display unit 48. ing.

  The heat storage amount detection unit 35 obtains a value corresponding to the heat storage amount of hot water in the hot water tank 2 based on monitor information related to detection of the heat storage amount of the operation status of the cogeneration hot water supply heat source device 3. The monitor information is, for example, information on the temperature detected by the hot water temperature detection sensors 101 to 111 in the hot water tank, information on the operating time of the power generator 1, and the like. The operating time of the power generation device 1 can be obtained from, for example, on / off information of the power generation device 1 and time information obtained from the timepiece mechanism 41. In addition, if a flow sensor is provided in the exhaust hot water introduction passage 14, information on the operation time of the power generation apparatus 1 can be obtained from information on the flow sensor.

  Here, an example of how to obtain a value corresponding to the heat storage amount of hot water in the hot water tank 2 is shown. For example, as the monitor information, the heat storage amount detection unit 35 takes in information on the temperature detected by the hot water temperature detection sensors 101 to 111 in the hot water tank, and the temperature detected by the hot water temperature detection sensor 105 in the hot water tank is about 60 ° C. If the temperature detected by the water temperature detection sensor 106 is about 20 ° C., the boundary line between the water and hot water in the hot water tank 2 as shown by the broken line A in FIG. 6 indicates the hot water temperature detection sensor 105 in the hot water tank and the hot water tank. It is determined that about 80 L of hot water at about 60 ° C. is accumulated in the hot water storage tank 2 between the internal hot water temperature detection sensor 106.

  Moreover, if the amount of hot water accumulated per unit time due to the operation of the power generation device 1 is given in advance to the heat storage amount detection unit 35 and this amount is 2 L per minute, for example, the time of the power generation device 1 obtained from the clock mechanism 41 When the information has passed for 30 minutes, the heat storage amount detection unit 35 determines that 60 L of hot water at about 60 ° C. is accumulated in the hot water storage tank 2. In this manner, the heat storage amount detection unit 35 can detect the amount of hot water in the hot water tank 2 from time to time based on the operating time information of the power generation device 1 obtained from the timepiece mechanism 41.

  Further, the heat storage amount detection unit 35 calculates the amount of hot water used in the hot water storage tank 2 from, for example, detection data of the flow rate sensor 70 and subtracts this value from the amount of hot water stored in the hot water storage tank 2, thereby The amount of hot water remaining in the tank 2 can be detected every moment, and the temperature of the hot water accumulated in the hot water storage tank 2 can be estimated from the elapsed time since the accumulation of hot water.

  The selection control unit 36 is a hot water supply heat source selection control unit, for example, when a value corresponding to the heat storage amount obtained by the heat storage amount detection unit 35 falls below a predetermined lower threshold for hot water supply heat source selection. The hot water supply heat source is switched from the hot water storage tank 2 to the auxiliary hot water supply heat source device 4 to supply hot water, and the value corresponding to the amount of stored hot water in the hot water storage tank 2 determined by the heat storage amount detection unit 35 is used for selecting the hot water supply heat source. When the temperature rises above a predetermined upper threshold value, hot water is supplied by switching the hot water supply heat source from the auxiliary hot water supply heat source device 4 to the hot water storage tank 2 of the cogeneration hot water supply heat source device 3. In addition, the selection control of the hot water supply heat source by the selection control unit 36 is not particularly limited, and is appropriately set.

  In the present embodiment, a hot water supply passage (hot water supply path 12) fed from the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 is communicated with a water supply inlet of the auxiliary hot water supply heat source device 4. When hot water at a set temperature or higher is sent from the hot water storage tank 2 using hot water as a heat source, the hot water in the hot water storage tank 2 is supplied to the hot water supply destination via the auxiliary hot water supply heat source device 4 in a non-heated drive state. Yes.

  That is, when hot water is supplied using the hot water in the hot water tank 2 as a heat source, the selection control unit 36 opens the hot water on / off valve 54 and adjusts the valve opening amounts of the hot water proportional valves 55 and 56 as appropriate. Hot water is mixed with water supplied from the water supply passage 11 via the branch passage 11b and sent to the auxiliary hot water supply heat source device 4 in a non-heated drive state as hot water at a set temperature. Then, for example, hot water having a set temperature introduced into the auxiliary hot water supply heat source device 4 is switched to the hot water path switching valve 58 to supply hot water to an appropriate hot water supply destination such as a kitchen through the branch passage 90, or the hot water open / close valve 59 is opened. Hot water filling is performed through the hot water introduction passage 95 and the hot water filling passage.

  Further, when the hot water supply heat source is switched to the auxiliary hot water supply heat source device 4, the selection control unit 36 closes the hot water on / off valve 54, for example, and supplies water introduced into the hot water mixing unit 10 from the water supply passage 11 through the branch passage 11 b. The hot water heater 5a is introduced through the connection passage 45, and a command is given to the combustion control unit 42 of the hot water heater 5a, and the hot water heater 5a is operated to supply hot water by the auxiliary hot water supply heat source device 4.

  When the selection control unit 36 selects the hot water supply operation from the auxiliary hot water supply heat source device 4, the combustion control unit 42 refers to the flow rate detected by the flow rate sensor 73 and turns on at least one of the gas on-off valves 81, 82, 83. Open and adjust the valve opening amount of the gas proportional valve 86 to adjust the amount of gas supplied to the burner 6 and also adjust the air volume of the combustion fan 8 to set the hot water discharged through the hot water supply heat exchanger 19. Combustion control of the burner 6 is performed so that the temperature becomes hot water. For simplification of the drawing, in FIG. 1, an arrow directed from the flow sensor 73 to the combustion control unit 42 is omitted.

  The hot water supply usage data detection unit 37 obtains from the flow sensor 73 hot water usage data for each time on the time axis for each set cycle with an integer multiple of one day (an integer multiple of 1) as a cycle. Detection is based on flow rate information and time information obtained from the clock mechanism 41. The information on the hot water supply flow rate obtained from the flow sensor 73 is information on the hot water supply flow rate used in the entire hot water supply apparatus. The hot water supply usage amount data detection unit 37 adds the detection data to the hot water supply usage amount related data learning storage unit 38.

  The hot water use amount-related data learning storage unit 38 accumulates the detection data detected by the hot water use amount data detection unit 37, and based on the accumulated data, the time on the time axis for each set period and the hot water use amount are stored. The relationship is learned and stored as relationship data, and the result is added to the drainage time setting unit 49.

  The power generation device operation status detection unit 47 detects the operation status of the power generation device 1 and adds this detection signal to the power consumption data detection unit 39. As described above, when the heat storage amount detection unit 35 detects the heat storage amount of the hot water tank 2 based on the operation state of the power generation device 1, the detection information of the power generation device operation state detection unit 47 is used as the heat storage amount detection unit 35. May take in.

  The power usage amount data detection unit 39 is configured for each set period based on information obtained from the power generation device operation status detection unit 47 (detection information of the power generation device operation status detection unit 47) and time information obtained from the clock mechanism 41. The data of the electric power consumption using the power generator 1 for each time on the time axis is detected. Then, this detected data is added to the power usage amount related data learning storage unit 43.

  The power usage amount related data learning storage unit 43 accumulates the detection data detected by the power usage amount data detection unit 39, and based on the accumulated data, the time on the time axis for each set period and the power usage amount used by the power generator. Is learned and stored as power consumption relationship data, and the result is added to the drainage time setting unit 49.

  The drainage time setting unit 49 refers to the hot water supply usage amount relationship data and the power usage amount relationship data, and the hot water supply usage amount for each time on the time axis for each set cycle is equal to or less than a predetermined hot water supply set value, and The drainage time of the hot water in the hot water tank is set at a time within a period in which the amount of power used for each time on the time axis for each set cycle is equal to or less than a predetermined power set value. Then, the set time information is added to the drainage operation promotion display unit 48 and the automatic drainage execution unit 40.

  That is, for example, as shown in FIG. 3, the drainage time setting unit 49 has a predetermined hot water supply set value (here, a value of A) for each time on the time axis for each set cycle indicated by the characteristic line a. ) And a time within a period (here, the amount of power used for each time on the time axis for each set period indicated by the characteristic line b is equal to or less than a predetermined power set value (here, B)) In D), the hot water draining time is set.

  The drainage operation promotion display unit 48 performs a display prompting the drainage operation of the hot water in the hot water tank 2 when the drainage time set by the drainage time setting unit 49 is reached.

  The automatic drainage execution unit 40 opens the drainage electromagnetic valve 52 at the drainage time set by the drainage time setting unit 49 and automatically drains hot water in the hot water tank 2 from the drainage passage 15 (for example, into the bathtub 126). .

  The drainage stop unit 34 closes the drainage electromagnetic valve 52 and stops the drainage operation by the automatic drainage execution unit 40 when hot water supply using the hot water storage tank 2 as a heat source is performed during drainage by the automatic drainage execution unit 40. is there. The drainage stop unit 34 determines whether hot water supply is performed using the hot water storage tank 2 as a heat source by detecting the open / closed state of the hot water on / off valve 54 or the flow rate detected by the flow sensor 70, and draining by the automatic drainage execution unit 40. When the hot water on / off valve 54 is opened at the time of execution, or when the flow rate detected by the flow rate sensor 70 is equal to or higher than the set flow rate, a drainage stop signal is applied to the automatic drainage execution unit 40 to stop drainage.

  The present embodiment is configured as described above, hot water supply or hot water filling is performed from the hot water supply heat source selected by the selection control unit 36, and the time axis in the set cycle is performed by the hot water use amount data detection unit 37. The relationship between the above time and the amount of hot water used is detected, and further, based on the accumulated data of the detection data of the hot water usage data detector 37, the hot water usage amount relation data learning storage unit 38 sets the time axis for each set period. The relationship between the above time and the amount of hot water used is learned and stored as hot water usage related data (for example, see characteristic line a in FIG. 3).

  Further, in the present embodiment example, based on the detection information of the power generation device operating state detection unit 47, the power usage data detection unit 39 uses the power generation device for each time on the time axis for each set period. The amount of data is detected, and based on the accumulated data of the detected data, the relationship between the time on the time axis for each set period and the amount of power used using the power generation device 1 by the power usage amount relationship data learning storage unit 43 Is learned and stored as power usage amount relationship data (see, for example, the characteristic line b in FIG. 3).

  Then, the drainage time setting unit 49 refers to the hot water supply usage amount relation data and the power usage amount relation data, and the hot water supply usage amount for each time on the time axis for each set cycle is equal to or less than a predetermined hot water supply set value, In addition, by setting the drainage time of hot water in the hot water tank at a time within the period when the power usage for each time on the time axis for each set cycle is less than or equal to the preset power setting value, the hot water usage and power usage The drainage time can be set at an appropriate time (for example, D in FIG. 3) with a small amount.

  Further, according to the present embodiment, at the drain time set by the drain time setting unit 49, the automatic drain execution unit 40 opens the drain electromagnetic valve 52 provided on the lower side of the hot water tank 2 and opens the drain passage. By automatically draining hot water in the hot water tank 2 from 15, the user can keep the hot water in the hot water tank 2 in a sanitary manner even if the user does not care about the drainage time in the hot water tank 2.

  Note that, according to the present embodiment example, the drainage operation promotion display unit 48 that performs a display prompting the drainage operation of the hot water in the hot water storage tank when the drainage time set by the drainage time setting unit 49 is reached is provided. Therefore, it is possible to inform the user of an appropriate drainage time. Therefore, the user can grasp that the drainage electromagnetic valve 52 is opened and drainage is performed at the time of drainage, and even if the drainage electromagnetic valve 52 is not automatically drained due to a failure, the user can manually By performing the draining operation, the hot water in the hot water tank 2 can be kept hygienic.

  Furthermore, according to the present embodiment, when hot water supply using the hot water storage tank 2 as a heat source is performed during drainage by the automatic drainage execution unit 40, the drainage electromagnetic valve 52 is closed and the drainage operation by the automatic drainage execution unit 40 is stopped. Therefore, even if hot water use different from normal use is performed and hot water supply using the hot water tank 2 as a heat source is performed during the automatic drain operation, the drain operation is stopped at that time. Therefore, it is possible to suppress the occurrence of trouble in hot water supply of the hot water in the hot water storage tank 2.

  Furthermore, according to the present embodiment, since it is a complex hot water supply device having the cogeneration hot water supply heat source device 3, hot water supply that can save energy by performing a hot water supply operation using the cogeneration hot water supply heat source device 3 as a hot water supply heat source. A device can be realized.

  Furthermore, according to the present embodiment, a hot water supply passage (hot water supply path 12) fed from the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 is communicated with the water supply inlet of the auxiliary hot water supply heat source device 4. When hot water is supplied using hot water as the heat source, the hot water in the hot water storage tank 2 is supplied to the hot water supply destination via the auxiliary hot water supply heat source apparatus 4 in a non-heated drive state, so that water is supplied from the hot water storage tank 2 of the cogeneration hot water supply heat source apparatus 3. By connecting the hot water supply passage and the water supply inlet of the auxiliary hot water supply heat source device 4, the system configuration can be simplified and hot water can be supplied efficiently.

  In addition, this invention is not limited to the said embodiment, It can take various aspects. For example, in the above embodiment, the automatic drainage execution unit 40 and the drainage operation promotion display unit 48 are provided, but only one of the automatic drainage execution unit 40 and the drainage operation promotion display unit 48 may be provided. That is, if either one of the automatic drainage execution unit 40 and the drainage operation promotion display unit 48 is provided, the automatic drainage execution unit 40 automatically opens the drainage electromagnetic valve 52 to automatically supply hot water in the hot water tank 2. By draining, the hot water in the hot water tank 2 can be maintained in a sanitary manner, and the user manually opens the drain electromagnetic valve 52 and drains the hot water in the hot water tank 2 by the display of the drainage operation promotion display section 48. Thus, the hot water in the hot water tank 2 can be kept hygienic.

  Moreover, although the drain stop part 34 was provided in the said embodiment, the drain stop part 34 can also be abbreviate | omitted.

  Furthermore, in the above embodiment, the setting cycle is one day, but the setting cycle is not limited to one day, and may be one week, and is appropriately set to an integer of 1 day × 1 or more.

  Further, in the above-described embodiment, the power generation device 1 of the cogeneration hot water supply heat source device 3 is a fuel cell. However, the power generation device 1 may be formed by an engine, and a hot water supply device having a configuration including the cogeneration hot water supply heat source device 3; The power generation apparatus 1 applied in this case only needs to be able to accumulate hot water in the hot water storage tank 2 using the exhaust heat, and the fuel and the configuration of the power generation apparatus 1 are not particularly limited and are appropriately set. Is.

  Moreover, in the said embodiment, between the hot water storage tank 2 of the cogeneration hot-water supply heat source apparatus 3, and the electric power generating apparatus 1, the water in the hot water storage tank 2 is heated into hot water using the exhaust heat of the electric power generating apparatus 1. Although the means is provided, as shown in FIGS. 4A and 4B, the means for heating the water in the hot water storage tank 2 using the heat of the exhaust heat absorbing fluid of the power generation apparatus 1 to make hot water is provided. Then, the hot water formed by the means may be accumulated in the hot water tank 2.

  In the configuration shown in FIG. 4A, a circulation line 66 for circulating the exhaust heat absorbing fluid of the power generator 1 is passed through the hot water storage tank 2, and heat is exchanged between the exhaust heat absorbing fluid and the water in the hot water storage tank 2. To make the water in the hot water tank 2 into hot water. Further, at this time, the exhaust heat absorbing fluid is cooled by giving the heat to the water in the hot water tank 2, and the exhaust heat absorbing fluid is sent to the power generator 1 as a cooling fluid.

  The configuration shown in FIG. 4B is a circulation pipe in which a heat exchange member 67 formed of, for example, a copper plate is provided between the hot water tank 2 and the power generator 1 to circulate the exhaust heat absorbing fluid of the power generator 1. The passage 66 is passed through the heat exchange member 67, and the heat exchange member 67 is provided with a circulation pipe 68 for circulating the water in the hot water tank 2, and the heat exhausted through the circulation pipe 66 through the heat exchange member 67. Heat exchange is performed between the absorbing fluid and the water passing through the circulation line 68. That is, the heat of the exhaust heat absorbing fluid is given to the water in the hot water storage tank 2 passing through the circulation pipe 68 through the heat exchange member 67 to turn the water in the hot water storage tank 2 into hot water. It cools to make a cooling fluid.

  In the above embodiment, the water supply channel 11 is connected to the water supply introduction passage 18 of the auxiliary hot water supply heat source device 4 via the hot water mixing unit 10, but as shown in FIG. It may be connected to the hot water supply passage 26 side through the valve 69, or the water supply passage 11 is connected to both the water supply introduction passage 18 and the hot water supply passage 26 through the valve 69 as shown in FIG. May be.

  Further, in the above embodiment, the hot water supply path 12 of the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 is communicated with the water supply inlet of the auxiliary hot water supply heat source device 4 via the hot water mixing unit 10 and the connection passage 45. In the invention, the cogeneration hot water supply heat source device 3 and the auxiliary hot water supply heat source device 4 may be provided separately and provided side by side.

  Furthermore, in the said embodiment, although it was set as the composite hot water supply system which has the cogeneration hot water supply heat source device 3 and the auxiliary hot water supply heat source device 4, it is good also as a hot water supply system which abbreviate | omitted the auxiliary hot water supply heat source device 4.

  Furthermore, in the above embodiment, the drainage time setting unit 49 obtains the drainage time of the hot water in the hot water tank 2 based on the learning data, but the hot water temperature in the hot water tank 2 is referred to obtain the drainage time. Also good. This is because the garbage collected in the hot water tank 2 includes, for example, calcium carbonate deposited in the hot water tank 2 in addition to sand and garbage contained in the tap water, and these have a high temperature in the hot water tank 2. It is because it precipitates so much and tends to accumulate in the bottom part of the hot water tank 2. Thus, the structure which determines the drainage time with reference to the hot water supply temperature in the hot water storage tank 2 does not particularly store hot water in the hot water storage tank 2 at a constant temperature, and hot water in the hot water storage tank 2 according to the amount of power generation. This is useful for switching temperature and the like.

It is a principal part block diagram which shows the control structure of one Example of the hot water supply heat source system which concerns on this invention with a block diagram. It is a principal part block diagram which shows typically the system configuration | structure of one Example of the hot water supply heat source system which concerns on this invention. It is a graph for demonstrating the example of the usage-amount data of the hot water supply and electric power which are learned and memorize | stored in the said embodiment, and the drainage time determined with reference to these data. It is principal part explanatory drawing which shows typically the structure of the cogeneration hot-water supply heat source apparatus applied to the other embodiment of the hot-water supply heat source system which concerns on this invention. It is principal part explanatory drawing which shows typically the connection structure of the hot water supply heat source system applied to other example embodiments of the present invention and the water supply path of the cogeneration hot water supply heat source device. It is explanatory drawing which shows typically the structural example and its operation | movement of a cogeneration hot-water supply heat source apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power generator 2 Hot water storage tank 3 Cogeneration hot water supply heat source device 4 Auxiliary hot water supply heat source device 5 Hot water heater 34 Drain stop part 35 Heat storage amount detection part 36 Selection control part 37 Hot water use amount data detection part 38 Hot water use amount relational data learning memory part 39 Electricity consumption data detection unit 40 Automatic drainage execution unit 41 Clock mechanism 42 Combustion control unit 43 Electricity consumption related data learning storage unit 44 Controller 47 Power generation device operation status detection unit 48 Drainage operation promotion display unit 101-111 Hot water temperature sensor in hot water tank

Claims (7)

  In a hot water supply heat source system including a cogeneration hot water supply source that supplies hot water accumulated in a hot water storage tank to the hot water supply destination using exhaust heat of the power generation device, the cycle is an integer multiple of one day (an integer multiple of 1 or more). A hot water use amount data detection unit for detecting hot water use amount data for each time on the time axis for each set cycle based on information on the hot water flow rate obtained from the flow sensor and time information obtained from the clock mechanism, and the hot water supply Hot water use amount relation for accumulating detection data detected by the use amount data detecting unit and learning and storing the relationship between the time on the time axis and the hot water use amount for each set period based on the accumulated data as hot water use amount relation data A data learning storage unit, a power generator operating status detector for detecting the operating status of the power generator, information obtained from the power generator operating status detector, and time information obtained from a clock mechanism Based on the above, a power usage data detection unit that detects power usage data using the power generation device for each time on the time axis for each set period, and a detection detected by the power usage data detection unit A power usage amount relationship data learning storage unit that stores data and learns and stores the relationship between the time on the time axis for each set period and the power usage amount used by the power generation device as power usage amount relationship data based on the stored data. The hot water use amount for each time on the time axis for each set cycle with reference to the hot water use amount relation data and the power use amount relation data is equal to or less than a predetermined hot water supply set value, and the time axis for each set cycle A drainage time setting unit that sets the drainage time of hot water in the hot water tank at a time within a period in which the amount of power used for each time is equal to or less than a predetermined power setting value, and the drainage time setting unit Upon reaching the boss was drainage time, hot-water supply heat source system and having a drainage operation promoting display unit for performing display to prompt the hot water drainage operation of the hot water storage tank.   In a hot water supply heat source system equipped with a cogeneration hot water source that supplies hot water accumulated in the hot water storage tank to the hot water destination using the exhaust heat of the power generator, a drain electromagnetic valve and a drain passage are provided on the lower side of the hot water storage tank. The hot water usage amount data for each time on the time axis for each set period with an integer multiple of one day (an integer multiple of 1) as a cycle is obtained from the information on the hot water flow rate obtained from the flow sensor and the clock mechanism. A hot water supply usage data detection unit that is detected based on the obtained time information, a detection data detected by the hot water usage data detection unit, and a time on the time axis for each set period based on the stored data A hot water supply usage-related data learning storage unit that learns and stores a relationship with hot water supply usage as hot water supply usage-related data, a power generation device operating status detection unit that detects an operating status of the power generation device, and the power generation device Based on the information obtained from the working status detection unit and the time information obtained from the clock mechanism, the power usage amount for detecting the power usage amount data using the power generator for each time on the time axis for each set period The detection data detected by the data detection unit and the power consumption data detection unit are accumulated, and the relationship between the time on the time axis for each set period and the power usage amount used by the power generation device is based on the accumulated data. With reference to the hot water usage relationship data and the power usage relationship data, the hot water usage amount for each time on the time axis for each set cycle is stored in advance. Hot water in the hot water storage tank at a time within a period that is less than or equal to the set hot water supply set value and the power consumption for each time on the time axis for each set cycle is less than or equal to the preset power set value A drainage time setting unit for setting the water time, and an automatic drainage execution unit for automatically draining hot water in the hot water tank from the drainage passage by opening the drainage electromagnetic valve at the drainage time set by the drainage time setting unit. A hot water supply heat source system comprising:   A drainage stop unit that closes a drainage electromagnetic valve and stops a drainage operation by the automatic drainage unit when hot water supply using a hot water storage tank as a heat source is performed during drainage by the automatic drainage unit. 2. A hot water supply system according to 2.   The hot water storage tank of the cogeneration hot water supply heat source device includes a water supply path for introducing water into the hot water storage tank and a hot water supply path for supplying hot water from the hot water storage tank, and the exhaust heat of the power generation apparatus is interposed between the hot water storage tank and the power generation apparatus. Alternatively, a means for heating the water in the hot water storage tank using the heat of the exhaust heat absorbing fluid of the power generator to make hot water is provided, and the hot water formed by the means is accumulated in the hot water storage tank. The hot water supply heat source system according to claim 1, wherein the hot water is supplied to a hot water supply destination through the hot water supply passage.   An auxiliary hot water supply heat source device having a function of supplying hot water created by heating the water to the hot water supply destination is provided together with the cogeneration hot water supply heat source device, and water is supplied from the hot water storage tank of the cogeneration hot water supply heat source device. The hot water supply passage is connected to the water supply inlet of the auxiliary hot water supply heat source device, and when hot water is supplied using the hot water in the hot water storage tank as a heat source, the hot water in the hot water storage tank is supplied via the auxiliary hot water supply heat source device in a non-heated drive state. The hot water supply heat source system according to any one of claims 1 to 4, wherein the hot water supply system is configured to supply hot water first.   The hot water supply heat source system according to any one of claims 1 to 5, wherein the power generation device is a fuel cell that generates electricity by reacting hydrogen and oxygen.   The hot water supply heat source system according to any one of claims 2 to 6, wherein the automatic drainage execution unit automatically drains the hot water in the hot water storage tank into the bathtub.

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