JP4199694B2 - Combined hot water supply system - Google Patents

Description

  The present invention is directed to 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 by using exhaust heat of a power generation device such as a polymer electrolyte fuel cell (PEFC), and heats water that is passed through The present invention relates to a combined hot water supply heat source system provided with an auxiliary hot water supply heat source device for supplying hot water prepared in this manner to a hot water supply destination.

  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. 5 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 converted into hot water 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 entirely filled with hot water having a temperature equal to or higher than the power generation allowable temperature, for example, 45 ° C. or higher, the cooling water cannot be introduced into the power generation device 1, so that 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 from the water supply pipe 11 into the hot water tank 2 by the amount of hot water reduced by this water supply. A boundary line between water and hot water in the hot water tank 2 indicated by a broken line A in FIG. The flow rate of hot water fed from the hot water supply path 12 is detected by the flow sensor 70.

  The cogeneration hot water supply heat source device 3 as described above is generally used in combination with, for example, an auxiliary hot water supply heat source device including a hot water heater, and is combined with the auxiliary hot water supply heat source device and the cogeneration hot water supply heat source device 3. A hot water supply heat source system is formed.

  In such a combined hot water supply heat source system, the hot water temperature (for example, the detection temperature of the hot water temperature detection sensor 100) supplied from the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 is, for example, less than (hot water supply set temperature + 1) ° C. When it is determined that the heat storage has been lost, the hot water supply heat source is switched to the auxiliary hot water supply heat source device, the hot water supply is continued, and the heat storage can be used again (for example, the detected temperature of the hot water temperature detection sensor 100 is the (hot water supply set temperature). +1) or more), the hot water supply heat source is switched again to the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 to supply hot water from the hot water storage tank 2.

JP2003-120998

  However, in the combined hot water supply heat source system, the presence or absence of heat storage in the hot water tank 2 is determined based on the hot water temperature fed from the hot water tank 2 and one reference value as described above, and the cogeneration hot water supply heat source device 3 When switching between hot water supply from the side and hot water supply from the auxiliary hot water source, depending on the relationship between the amount of heat stored in the hot water storage tank 2 during hot water supply, the flow rate of hot water, and the amount of heat stored by power generation Immediately after using up the heat storage in the hot water tank 2 (using hot water) and switching to the auxiliary hot water supply heat source device, the heat storage becomes available again. After switching the hot water supply heat source to the hot water tank 2 again, Immediately, the stored heat in the hot water storage tank 2 is used up and the auxiliary hot water supply heat source device is switched.

  Then, the hot water supply from the cogeneration hot water supply heat source device 3 side and the hot water supply from the auxiliary hot water supply heat source device are frequently switched, and there is a problem that the hot water temperature is not stabilized and the user is uncomfortable.

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a complex hot water supply heat source system including a cogeneration hot water supply heat source device and an auxiliary hot water supply heat source device, with a stable hot water temperature and ease of use. It is to provide a complex hot water supply heat source system.

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 includes a power generation device and a hot water storage tank, introduces water in the hot water storage tank into the power generation device as cooling water, and heats the cooling water using the exhaust heat generated by the power generation device. In the hot water storage tank, the hot water stored in the hot water storage tank is accumulated and the hot water accumulated in the hot water storage tank is supplied to the hot water supply destination, and the hot water created by heating the flowing water is supplied. In a combined hot water supply heat source system provided with an auxiliary hot water supply heat source device having a function to be supplied first, a control device for controlling the hot water supply operation of the cogeneration hot water supply heat source device and the auxiliary hot water supply heat source device is provided in a hot water storage tank. and the lower shows the threshold data is upper threshold value corresponding to the quantity of water remaining amount, the amount of hot water at the time of the state in which the hot water of the hot water storage tank is used up in the set temperature range to which it previously given a small difference value than It is given by the threshold value, control Hot water usage of the hot water in the hot water tank obtained by the flow sensor from the accumulation amount of hot water running time obtained hot water storage tank based on the hot water quantity of thermal storage and power generator per unit time by the operation of the power generator to the device the subtracted heat storage amount detection unit for determining the amount of hot water remaining in the hot water in the hot water tank as a value corresponding to the amount of heat stored in the hot water tank is provided, the remaining amount of the hot water in the hot water storage tank obtained by the heat storage amount detection unit When the value of the temperature drops below the lower threshold value, the hot water supply source is switched from the hot water storage tank to the auxiliary hot water supply heat source device to perform hot water supply, and the value corresponding to the heat storage amount of hot water in the hot water storage tank is the upper threshold value. When the temperature rises above, the hot water supply source is switched from the auxiliary hot water supply heat source device to the hot water storage tank of the cogeneration hot water supply heat source device to provide a hot water supply source selection control unit for hot water supply. Moreover, the 2nd-5th invention is the hot water produced by heating the water of a cogeneration hot water supply heat source apparatus which supplies hot water accumulated in the hot water storage tank to the hot water supply destination using the exhaust heat of the power generator, In a combined hot water supply heat source system provided with an auxiliary hot water supply heat source device having a function of supplying hot water to a hot water supply destination, the control device for controlling the hot water supply operation of the cogeneration hot water supply heat source device and the auxiliary hot water supply heat source device has a heat storage amount Threshold data corresponding to the upper threshold value and lower threshold value smaller than that are given, and the control device has a hot water storage tank based on monitor information related to detection of the amount of heat stored in the operating status of the cogeneration hot water source When a value corresponding to the amount of stored heat obtained by the amount of stored heat is reduced below the lower threshold, a hot water supply heat is provided. Is switched from the hot water storage tank to the auxiliary hot water supply heat source device to perform hot water supply, and when the value corresponding to the amount of stored hot water in the hot water tank rises above the upper threshold value, the hot water supply heat source is connected from the auxiliary hot water supply heat source device. A common hot water supply heat source selection control unit that performs hot water supply by switching to a hot water storage tank of a generation hot water supply heat source device is used as a common configuration. On the second aspect of the invention, the hot water supply heat source is cogenerated by the control device. When the hot water storage tank of the hot water supply heat source device is switched to the auxiliary hot water supply heat source device, the hot water supply heat source is switched from the auxiliary hot water supply heat source device to the hot water storage tank of the cogeneration hot water supply heat source device until the continuous hot water supply from the auxiliary hot water supply heat source device is completed. The heat source switching prevention part is provided as a means for solving the problem, and the third invention includes the common structure, and the heat storage A threshold value data changing unit that changes threshold data corresponding to the threshold value data, and the threshold value data changing unit includes at least one of an upper threshold value and a lower threshold value as the water supply temperature to the hot water tank increases. The fourth aspect of the present invention is a means for solving the problem by having a configuration in which the upper threshold value is changed in a direction of decreasing, and the fourth invention has the common configuration and has a threshold corresponding to the heat storage amount. A threshold data changing unit for changing the value data, and the threshold data changing unit reduces at least the upper threshold value of the upper threshold value and the lower threshold value as the hot water supply set temperature decreases. The fifth invention is provided with the above-described common configuration, and the period is an integer multiple of one day (an integer multiple of 1 or more). For each time on the time axis A hot water use amount learning storage unit that learns and stores hot water use amount based on hot water flow rate information obtained from a flow sensor and time information obtained from a clock mechanism, and a threshold value that changes threshold data corresponding to the heat storage amount And a threshold value data changing unit that takes in time data from the clock mechanism and refers to the data in the hot water use amount learning storage unit to raise the time when the hot water use amount is approaching. It is a means for solving the problem by adopting a configuration in which at least the upper threshold value of the threshold value and the lower threshold value is changed.

In addition to the configuration of any one of the second to fifth inventions, the sixth invention provides a hot water storage tank of the cogeneration hot water supply heat source device, wherein a hot water supply path and hot water storage for introducing water supply into the hot water storage tank are provided. A hot water supply passage is provided for supplying hot water from the tank, and the water in the hot water tank is heated between the hot water storage tank and the power generator using the exhaust heat of the power generator or the heat of the exhaust heat absorbing fluid of the power generator. Means for solving the problem with a configuration in which means for forming hot water is provided, 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. It is said.

Furthermore, a seventh aspect of the invention is that, in addition to the configuration of any one of the first to sixth aspects of the invention, the passage of hot water supplied from the hot water storage tank of the cogeneration hot water supply heat source device is water supply introduction of the auxiliary hot water supply heat source device. When hot water is supplied using only the hot water in the hot water tank as a heat source, the hot water in the hot water tank is configured to supply hot water to the hot water destination through an auxiliary hot water supply heat source device in an unheated drive state. To do.

Furthermore, in an eighth aspect of the invention, in addition to the configuration of any one of the first to seventh aspects of the invention, the selection control unit takes in detected temperature information of hot water supplied from the hot water tank and detects the hot water supply. When the temperature is lower than the hot water supply set temperature, the auxiliary hot water supply heat source device is driven to heat, and the hot water from the hot water storage tank is heated by the auxiliary hot water supply heat source device and supplied to the hot water supply destination.

Furthermore, in the ninth aspect of the invention, in addition to the configuration of any one of the first or third to eighth aspects, the control device switches the hot water supply heat source from the hot water storage tank of the cogeneration hot water supply heat source device to the auxiliary hot water supply heat source device. when it is, that until the continuous feeding hot water from the auxiliary water heater heat source device is completed is provided with a heat source switching blocking unit for blocking the switching of the hot water supply heat source from the auxiliary hot water supply heat source apparatus to the hot water storage tank cogeneration hot water supply heat source device The structure is a means to solve the problem.

Further, a tenth aspect of the invention is a threshold value data changing unit that changes threshold value data corresponding to the heat storage amount in addition to the configuration of any one of the first, second, or fourth to ninth aspects. And the threshold value data changing unit is configured to change at least the upper threshold value between the upper threshold value and the lower threshold value as the water supply temperature to the hot water tank increases. It is characterized by being.

Further, an eleventh aspect of the invention is the threshold value for changing the threshold data corresponding to the heat storage amount in addition to the configuration of any one of the first, second, third, or fifth to tenth inventions. The threshold value data changing unit is configured to change at least the upper threshold value between the upper threshold value and the lower threshold value as the hot water supply set temperature decreases. It is a means to solve the problem with the configuration.

Furthermore, in a twelfth aspect , in addition to the configuration of any one of the first to fourth aspects or the sixth to eleventh aspects , an integral multiple of one day (an integral multiple of 1 or more) A hot water use amount learning storage unit that learns and stores hot water use amount for each time on the time axis as a cycle based on information on the hot water flow rate obtained from the flow sensor and time information obtained from the clock mechanism, and corresponds to the heat storage amount A threshold data changing unit for changing threshold data, the threshold data changing unit fetching time data from a clock mechanism and referring to the data in the hot water consumption learning storage unit, It is characterized in that at the time of approaching an increasing time zone, at least the upper threshold value of the upper threshold value and the lower threshold value is changed in the direction of decreasing.

Furthermore, the thirteenth aspect of the invention is a means for solving the problems by having a configuration in which the power generation device is a fuel cell that generates electricity by reacting hydrogen and oxygen in addition to the configuration of any one of the first to twelfth aspects of the invention. It is said.

Further, the fourteenth invention is a means for solving the problems with a configuration in which the power generator is a gas engine in addition to the configuration of any one of the first to thirteenth inventions.

  According to the present invention, the threshold value data corresponding to the heat storage amount is set to the upper threshold value and the lower value lower than that to the control device that controls the hot water supply operation of the cogeneration hot water supply heat source device and the auxiliary hot water supply heat source device. A threshold value is given, and a value corresponding to the heat storage amount of hot water in the hot water tank is obtained based on monitor information relating to the heat storage amount detection of the operating status of the cogeneration hot water source, and the value corresponding to the obtained heat storage amount is When the temperature falls below the threshold value, the hot water supply source is switched from the hot water storage tank to the auxiliary hot water supply heat source device to supply hot water, and the value corresponding to the heat storage amount of hot water in the hot water tank rises above the upper threshold value. Performs hot water supply by switching the hot water source from the auxiliary hot water source to the hot water storage tank of the cogeneration hot water source.

  That is, in the present invention, the control device is provided with an upper threshold value and a lower threshold value that is smaller than the upper threshold value as threshold data corresponding to the heat storage amount, and these values and the cogeneration hot water supply heat source device Compared with the value corresponding to the heat storage amount of hot water in the hot water storage tank obtained based on the monitor information on the detection of the heat storage amount of the operating status of the hot water tank, the hot water storage source is switched. Since the hot water in the hot water tank can be used as a hot water supply source after this time, it is possible to suppress frequent switching of the hot water supply heat source as in the conventional example, and to stabilize the hot water temperature.

  Further, 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 apparatus is accumulated in the hot water storage tank, and the hot water of the 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, the passage of hot water supplied from the hot water storage tank of the cogeneration hot water supply heat source device is connected to the water supply inlet of the auxiliary hot water supply heat source device, and when hot water is supplied using only the hot water of the hot water storage tank as a heat source, According to the configuration in which the hot water is supplied to the hot water supply destination via the auxiliary hot water supply heat source device in the non-heated drive state, the hot water supply passage supplied from the hot water storage tank of the cogeneration hot water supply heat source device and the water supply inlet of the auxiliary hot water supply heat source device The system configuration can be simplified and hot water can be efficiently supplied.

  Further, in the present invention, the selection control unit takes in the detected temperature information of the hot water supplied from the hot water tank, and when the detected temperature of the hot water is lower than the hot water set temperature, the auxiliary hot water source is heated to drive the hot water from the hot water tank. According to the configuration in which the hot water is heated by the auxiliary hot water supply source and supplied to the hot water supply destination, for example, when the hot water in the hot water storage tank has not been used for a long time and the hot water temperature has dropped below the set temperature, etc. Efficient hot water supply can be performed by heating the hot water supplied from the tank with the auxiliary hot water supply heat source device and supplying the hot water to the hot water supply destination.

Further, in the present invention, when the hot water supply heat source is switched from the hot water tank cogeneration hot water supply heat source device to the auxiliary hot water supply heat source apparatus by the control unit, until a continuous supply hot water from the auxiliary water heater heat source device is ended auxiliary hot water supply heat source device According to the configuration provided with the heat source switching blocking unit that blocks the switching of the hot water source to the hot water storage tank of the cogeneration hot water source, the frequent switching of the hot water source is further suppressed. Temperature stabilization can be further ensured.

  Furthermore, in the present invention, a threshold value data changing unit for changing threshold value data corresponding to the heat storage amount is provided, the threshold value data changing unit being an upper threshold value as the water supply temperature to the hot water storage tank increases. According to the configuration in which at least the upper threshold value of the lower threshold value is changed in the direction of reducing the upper threshold value, the upper threshold value is changed at least in accordance with the feed water temperature to the hot water tank. By doing so, the hot water storage tank of the cogeneration hot water supply heat source device can be used more as a hot water supply heat source, and energy saving can be achieved.

  Further, in the present invention, a threshold value data changing unit that changes threshold value data corresponding to the heat storage amount is provided, and the threshold value data changing unit decreases from the upper threshold value as the hot water supply set temperature decreases. According to the configuration in which at least the upper threshold value of the threshold value is changed in the direction of decreasing the upper threshold value, cogeneration is performed by changing the threshold value of at least the upper threshold value in accordance with the hot water supply set temperature. More hot water storage tanks of the hot water supply heat source device can be used as the hot water supply heat source, and energy saving can be achieved.

  Furthermore, in the present invention, a hot water supply usage learning storage unit and a threshold data changing unit that changes threshold data corresponding to the amount of stored heat, the threshold data changing unit from the clock mechanism to the time data When the hot water usage amount approaches the time zone when the hot water usage amount increases, at least the upper threshold value and the lower threshold value are changed so as to decrease the upper threshold value. According to the configuration, the hot water storage tank of the cogeneration hot water supply heat source device can be used more as a hot water supply heat source by changing at least the upper threshold value when the hot water use amount is approaching. , Energy saving can be achieved.

  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 composite hot water supply heat source system can be constructed.

  Furthermore, in the present invention, according to the configuration in which the power generation device is a gas engine, a combined hot water supply heat source system capable of exhibiting the above-described effect can be constructed using the power generation device of the gas engine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment, the same reference numerals are assigned to the same names as those in the conventional example, and the duplicate description is omitted or simplified.

  FIG. 2 schematically shows a system configuration diagram of the first embodiment of the combined hot water supply heat source system according to the present invention, and FIG. 1 schematically shows a control configuration thereof. As shown in FIG. 2, the combined hot water supply heat source system of this embodiment is formed with a cogeneration hot water supply heat source device 3 and an auxiliary hot water supply heat source device 4. Further, the combined hot water supply heat source system of the present embodiment is provided with a control device 44 configured as shown in FIG. 1 in order to control the hot water supply operation of the cogeneration hot water supply heat source device 3 and the auxiliary hot water supply heat source device 4.

  As shown in FIG. 2, the cogeneration hot water supply heat source device 3 applied to the present embodiment is configured in substantially the same manner as the device shown in FIG. 5, and stores hot water using the exhaust heat of the power generation device 1. This is a device for supplying hot water accumulated in the tank 2 to a hot water supply destination. 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. A flow rate sensor 70 is provided on the outlet side of the hot water supply passage 12.

In the present embodiment, the power generator 1 is formed of a fuel cell, and hydrogen 2H ⁺ extracted from fuel such as city gas and oxygen in the air (1/2) by the reverse reaction of water electrolysis. ) A device that generates electricity by reacting with O ₂ .

  The cogeneration hot water supply heat source device 3 and the auxiliary hot water supply heat source device 4 are connected to the hot / cold water mixing unit 10 via the connection passage 45, and the hot water / water mixing unit 10 is connected to the branch passage 11 b of the water supply pipe 11.

  The hot water / water mixing unit 10 is supplied with water from the hot water pipe 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, and a water supply pipe 11. 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 hot water temperature detection sensors 118 and 119 are 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. The hot water supply passage 26 is provided with a hot water temperature detection sensor 113 on the downstream side of the junction 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. A hot water on / off valve 59, a check valve 92, a flow rate sensor 74, and a water level sensor 125 are provided in the bath pouring introduction passage 95. 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 the combined hot water supply heat source system of the present embodiment is configured as described above. Next, 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 heat source switching prevention unit 37, a hot water supply usage learning storage unit 38, a threshold data memory unit 39, a threshold data change unit 40, a clock mechanism 41, A combustion control unit 42 is provided.

  In this embodiment, threshold data corresponding to the amount of stored heat is given to the control device 44, and hot water supply heat sources are assigned to the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 and the auxiliary hot water supply heat source device 4 based on the threshold data. Further, the threshold value data is variable as necessary. Hereinafter, the control configuration of the control device 44 will be described in detail.

  The hot water use amount learning storage unit 38 uses the hot water flow rate information obtained from the flow sensor 73 as the hot water use amount for each time on the time axis with an integer multiple of one day (an integer multiple of 1) as a cycle, and a clock mechanism. 41 based on the time information obtained from 41. That is, for example, the time when the bath is filled and the amount of hot water used is large differs for each household, and the hot water usage amount learning storage unit 38 stores such information.

  The threshold value data memory unit 39 stores threshold value data corresponding to the heat storage amount, and this threshold value data is given by an upper threshold value and a lower threshold value smaller than that. ing. There are various ways of giving the threshold data, but as an example, it can be given by the amount of hot water in the set temperature range (for example, 43 ° C. to 60 ° C.) accumulated in the hot water tank 2. In this case, for example, the upper threshold value is given as 40L, and the lower threshold value is given as 0.

  The threshold data changing unit 40 appropriately changes threshold data corresponding to the heat storage amount. The threshold value data changing unit 40 takes in the detected temperature of the water supply temperature sensor 112 and decreases at least the upper threshold value among the upper threshold value and the lower threshold value as the water supply temperature to the hot water tank 2 increases. It has a configuration that changes in the direction. The threshold data changing unit 40 sets at least the upper threshold value among the upper threshold value and the lower threshold value as the hot water supply set temperature input by an operation unit (not shown) such as a remote controller becomes lower. It is configured to change in the direction of decreasing.

  That is, when the water supply temperature is high or the hot water supply set temperature is low, for example, the amount of water mixed from the water supply pipe 11 via the branch passage 11b increases with respect to the amount of hot water fed from the hot water tank 2. Even if the amount of hot water stored in the hot water storage tank 2 is small, the amount of hot water stored in the hot water storage tank 2 is sufficient for the hot water storage tank 2 to be used at a time, for example, by a shower or the like. Therefore, in the present embodiment, as described above, the upper threshold value is changed according to the water supply temperature or the hot water supply set temperature.

  Further, the threshold data changing unit 40 takes in the time data from the clock mechanism 41, refers to the data in the hot water supply usage learning storage unit 38, and approaches the upper threshold when the hot water usage is approaching. The configuration is such that at least the upper threshold value of the value and the lower threshold value is changed to be smaller.

  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 generator 1 can be obtained from, for example, on / off information of the power generator 1 and time information obtained from the clock 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. 5 is 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.

  In addition, the value corresponding to the heat storage amount of the hot water in the hot water tank 2 obtained based on the information of the detected temperature by the hot water temperature detection sensors 101 to 111 in the hot water tank is a value obtained by direct measurement. Therefore, although it can also be called the heat storage amount of the hot water in the hot water storage tank 2, in this application, the value calculated | required as mentioned above is also called the value corresponding to the heat storage amount.

  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, and when the value corresponding to the heat storage amount obtained by the heat storage amount detection unit 35 falls below the lower threshold value, the hot water supply heat source is changed to the hot water storage tank. When the value corresponding to the heat storage amount of hot water in the hot water storage tank 2 obtained by the heat storage amount detection unit 35 rises above the upper threshold value, Hot water is supplied by switching the heat source from the auxiliary hot water supply device 4 to the hot water storage tank 2 of the cogeneration hot water supply device 3.

  In the present embodiment, the hot water supply passage (hot water supply passage 12) fed from the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 is connected to the water supply inlet of the auxiliary hot water supply heat source device 4 through the connection passage 45. When hot water of a set temperature or higher is sent from the hot water tank 2 using only the hot water of the hot water tank 2 as a heat source, the hot water of the hot water 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. It consists of a hot water supply configuration.

  That is, when hot water is supplied using only 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 route switching valve 58 to supply hot water to an appropriate hot water supply destination such as a kitchen through the branch passage 90, or a bath pouring introduction passage 95. Through the bath. When the bath is filled with water, the hot water on / off valve 59 is opened.

  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 pipe 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.

  The combustion controller 42 opens at least one of the gas on-off valves 81, 82, 83 while referring to the detected flow rate of the flow sensor 73, adjusts the valve opening amount of the gas proportional valve 86, and is supplied to the burner 6. While adjusting the amount of gas, the air volume of the combustion fan 8 is adjusted, and the combustion of the burner 6 is controlled so that the hot water discharged through the hot water supply heat exchanger 19 becomes hot water of a set temperature.

  When the hot water supply heat source is switched from the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 to the auxiliary hot water supply heat source device 4 by the control device 44, the heat source switching prevention unit 37 until the hot water supply operation of the auxiliary hot water supply heat source device 4 is completed. The heat source switching 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 is prevented.

  In the present embodiment, the heat source switching prevention unit 37 monitors the hot water flow rate detected by the flow rate sensor 73 of the water heater 5a, the detected flow rate of the flow rate sensor 70 becomes zero, and the detected flow rate of the flow rate sensor 73 is positive. It is determined that the hot water supply heat source has been switched to the auxiliary hot water supply heat source device 4 until the detected flow rate of the flow rate sensor 73 becomes zero and the hot water supply operation of the auxiliary hot water supply heat source device 4 ends. Then, the hot water on / off valve 54 is prevented from being opened by the selection control unit 36, and the hot water supply heat source is the auxiliary hot water supply heat source device 4.

  In the present embodiment, when the selection control unit 36 is operated by switching the hot water supply heat source to the auxiliary hot water supply heat source device 4, normally, as described above, the hot water supply pipe 11 and its branch passage 11b are passed from the water supply source. Then, the water supplied to the auxiliary hot water supply heat source device 4 is heated by the auxiliary hot water supply heat source device 4, and the water supplied from the hot water storage tank 2 is also controlled to be heated by the auxiliary hot water supply heat source device 4 as necessary.

  That is, the temperature of the hot water introduced into the hot water tank 2 from the exhaust hot water introduction passage 14 is about 60 ° C. If the hot water in the hot water tank 2 is not used for a long time, the hot water in the hot water tank 2 The temperature drops, and in this case, the amount of hot water in the set temperature range (for example, 43 ° C. to 60 ° C.) accumulated in the hot water tank 2 is determined to be 0 and cannot be used. Then, the hot water in the hot water storage tank 2 is not sent to the auxiliary hot water supply heat source device 4 side, but in order to operate more efficiently, it may be preferable to heat and use the hot water in the hot water storage tank 2. is there.

  In the present embodiment example, the selection control unit 36 monitors the detection temperatures of the hot water temperature detection sensors 101 to 111 in the hot water tank, and even when the amount of hot water in the set temperature range is zero, hot water having a hot water temperature of 25 degrees or more is set. When there is more than the amount, the hot water in the hot water storage tank 2 is sent out from the hot water supply passage 12, and this hot water is heated by the auxiliary hot water supply heat source device 4 and supplied to the hot water supply destination. That is, in this case, when the detected temperature information of the hot water supplied from the hot water storage tank 2 is taken in from the hot water temperature detection sensor 100, the detected temperature of the hot water is lower than the set hot water temperature. The hot water from the hot water storage tank 2 is heated by the auxiliary hot water supply heat source device 4 and supplied to the hot water supply destination. With this configuration, more efficient hot water supply can be performed.

  The present embodiment is configured as described above, and the threshold value data corresponding to the heat storage amount is given to the control device 44 by the upper threshold value and the lower threshold value which is smaller than that, and the cogeneration hot water supply When the value corresponding to the heat storage amount in the hot water storage tank 2 obtained based on the monitor information related to the detection of the heat storage amount of the operation status of the heat source device 3 falls below the lower threshold value, the hot water supply heat source is removed from the hot water storage tank 2. When the value corresponding to the heat storage amount of hot water in the hot water storage tank 2 rises above the upper threshold value, the hot water supply source is co-generated from the auxiliary hot water supply source 4 Since the hot water supply is performed by switching to the hot water storage tank 2 of the hot water supply heat source device 3, frequent switching of the hot water supply heat source can be suppressed, and the temperature of the hot water can be stabilized.

  Further, according to the present embodiment example, the control device 44 is provided with the heat source switching prevention unit 37, and when the hot water supply heat source is switched from the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 to the auxiliary hot water supply heat source device 4, the auxiliary hot water supply is provided. Until the hot water supply operation of the heat source device 4 is completed, the heat source switching 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 is prevented. It is possible to further suppress and stabilize the tapping temperature even more reliably.

  Furthermore, according to the present embodiment example, the threshold value data changing unit 40 for changing the threshold value data corresponding to the heat storage amount is provided, and the upper threshold value is lowered as the water supply temperature to the hot water tank 2 becomes higher. Change the threshold to at least lower the upper threshold, or change the threshold to decrease at least the upper threshold of the upper and lower thresholds as the hot water set temperature decreases. Since it is configured, it is possible to use the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 more as a hot water supply heat source by changing at least the upper threshold value according to the water supply temperature or the hot water supply set temperature, Energy saving can be achieved.

  Further, according to the present embodiment, the hot water use amount learning storage unit 38 is provided, and the threshold value data changing unit 40 takes in the time data from the clock mechanism 41 and refers to the data 38 of the hot water use amount learning storage unit. When the hot water consumption amount approaches the time zone when the amount of hot water used increases, at least the upper threshold value of the upper threshold value and the lower threshold value is changed so as to reduce the upper threshold value. It can be used more as a hot water supply heat source, and energy saving can be achieved.

  Furthermore, according to this embodiment, the hot water formed by the means provided between the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 and the power generation apparatus 1 is accumulated in the hot water storage tank 2, and the hot water storage tank 2 Since the hot water is supplied to the hot water supply destination through the hot water supply path 12 provided in the hot water storage tank 2, hot water accumulation by the cogeneration hot water supply heat source device 3 and hot water supply from the hot water storage tank 2 are efficiently performed. be able to.

  Furthermore, according to the present embodiment, the 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, and the hot water storage tank When hot water is supplied using hot water at a set temperature of 2 or more 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, so that the system configuration is simplified. The hot water can be efficiently supplied.

  Furthermore, according to this embodiment, the power generation device 1 is a fuel cell that generates electricity by reacting hydrogen and oxygen, so that the cogeneration hot water supply heat source device can be operated without discharging substances that adversely affect the environment. It is possible to construct an environmentally friendly combined hot water supply heat source system.

  In addition, this invention is not limited to the said embodiment, It can take various aspects. For example, in the embodiment described above, the power generation device 1 is a fuel cell, but the fuel and configuration of the power generation device 1 are not particularly limited, and are appropriately set. That is, the power generation device 1 may be a gas engine, and a gas turbine power generation device, a diesel engine power generation device, or the like can be applied. The present invention uses the heat generated by the power generation system formed using such a power generation device 1. The heat storage tank 2 may be used to store heat.

  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. As shown in FIGS. 3 (a) and 3 (b), the means for heating the water in the hot water storage tank 2 by using the heat of the exhaust heat absorbing fluid of the power generator 1 is used. Then, the hot water formed by the means may be accumulated in the hot water tank 2.

  In the configuration shown in FIG. 3A, the circulation pipe 66 for circulating the exhaust heat absorbing fluid of the power generation device 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. At this time, the heat of the exhaust heat absorbing fluid is given to the water in the hot water storage tank 2 to be cooled, and the exhaust heat absorbing fluid is sent to the power generator 1 as a cooling fluid.

  The configuration shown in FIG. 3B 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.

  Moreover, in the said embodiment, although the water supply pipe 11 was connected to the water supply introduction path 18 of the auxiliary hot water supply heat source apparatus 4 via the hot water mixing unit 10, as shown to Fig.4 (a), the water supply pipe 11 is shown. May be connected to the hot water supply passage 26 side through the valve 69, or as shown in FIG. 4B, the water supply pipe 11 is connected to the hot water supply passage 18 and the hot water supply passage 26 through the valve 69. You may connect to both.

  Furthermore, in the above embodiment, the control device 44 includes the heat source switching prevention unit 37, but the heat source switching prevention unit 37 may be omitted. In this case, for example, the threshold value data changing unit 40 refers to the data in the hot water supply usage learning storage unit 38 and decreases the upper threshold when the hot water usage is approaching. If it is changed, there is a possibility that the hot water supply heat source is switched slightly more.

  However, the amount of hot water used is very large when the hot water is filled, for example. In such a case, even if there is a slight fluctuation in hot water temperature, the user is less likely to feel uncomfortable, and the upper threshold value is reduced. Further, by increasing the ratio of the hot water storage tank 2 as a hot water supply source, further energy saving can be achieved.

  Furthermore, in the above embodiment example, the threshold data changing unit 40 is provided to monitor the hot water supply temperature and the hot water set temperature to the hot water storage tank 2, and further refer to the data in the hot water use amount learning storage unit 38, Although the upper threshold value is changed in a decreasing direction, the threshold value data changing unit 40 monitors the hot water supply temperature to the hot water storage tank 2, monitors the hot water supply set temperature, and the data in the hot water supply usage learning storage unit 38. The upper threshold value may be changed in a direction of decreasing according to at least one of the references. In addition, when the threshold value data changing unit 40 does not refer to data in the hot water supply usage amount learning storage unit 38, the hot water supply usage amount learning storage unit 38 may be omitted.

  Further, the threshold data changing unit 4 may change both the upper threshold value and the lower threshold value. Further, the threshold data changing unit 40 is omitted, and the selection control unit 36 selects the hot water supply heat source as the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 based on the upper threshold value and the lower threshold value given in advance. It may be switched to any one of the auxiliary hot water supply heat source devices 4.

  Furthermore, when the hot water supply usage learning storage unit 38 is omitted and the heat storage amount detection by the heat storage amount detection unit 35 is not performed based on the operation time of the power generation device 1, the clock mechanism 41 can be omitted.

  Further, in the above embodiment, the auxiliary hot water supply heat source device 4 is an auxiliary hot water supply heat source device capable of hot water supply, bathing, and hot water heating, but the configuration of the auxiliary hot water supply heat source device 4 is applied to the above embodiment example. As long as it is a device that can supply hot water created by heating water flow to the hot water supply destination, for example, only a hot water heater may be used, and oil combustion is not performed as a gas combustion type. It may be a formula and various configurations can be applied.

  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.

It is a principal part block diagram which shows the control structure of one Embodiment of the composite hot-water supply heat source system which concerns on this invention. It is a principal part block diagram which shows typically the system configuration | structure of one Embodiment of the composite hot-water supply heat source system which concerns on this invention. 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 example of the composite hot water supply heat source system which concerns on this invention. It is principal part explanatory drawing which shows typically the connection structure with the water supply pipe | tube of the cogeneration hot-water supply heat source apparatus with the auxiliary hot-water supply heat source apparatus applied to the other embodiment of the composite hot-water supply heat source system which concerns on this invention. 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 Water heater 35 Heat storage amount detection part 36 Selection control part 37 Heat source switching prevention part 38 Hot water supply usage learning memory part 39 Threshold data memory part 40 Threshold data changing unit 41 Clock mechanism 42 Combustion control unit 44 Controller 101-111 Hot water temperature detection sensor in hot water tank

Claims (14)

A power generation device and a hot water storage tank are provided, water in the hot water storage tank is introduced into the power generation device as cooling water, and the cooling water is heated using the exhaust heat generated by the power generation device to form hot water from above the hot water storage tank. put accumulate in the hot water storage tank, comprising: a cogeneration hot water supply heat source apparatus for hot-water supply the hot water accumulated in the hot water storage tank for hot water supply destination, a function of supplying hot water prepared by heating water in the water passing to the hot water destination In a combined hot water supply heat source system provided with an auxiliary hot water supply heat source device, the controller for controlling the hot water supply operation of the cogeneration hot water supply heat source device and the auxiliary hot water supply heat source device corresponds to the remaining amount of hot water in the hot water storage tank. and threshold data upper threshold, a small difference value than that given by a lower threshold value that indicates the amount of hot water at the time of the state in which the hot water of the hot water storage tank is used up in the set temperature range given in advance, the control operation of power generation equipment in the apparatus According Yu per unit time heat storage capacity and power generator operation of the time obtained hot water storage tank based on the accumulated amount of hot water in the hot water tank obtained by the flow rate sensor of the hot water hot water usage the subtracted by the hot water tank heat storage amount detection unit is provided to determine the amount of hot water in the hot water remaining as a value corresponding to the amount of heat stored in the hot water tank, the value is the lower threshold of the remaining amount of the hot water in the hot water storage tank obtained by the heat storage amount detection unit When the temperature falls below the value, the hot water supply source is switched from the hot water storage tank to the auxiliary hot water supply heat source device to perform hot water supply, and when the value corresponding to the heat storage amount of the hot water in the hot water tank rises above the upper threshold value, A combined hot water supply heat source system, comprising: a hot water supply heat source selection control unit that performs hot water supply by switching the heat source from the auxiliary hot water supply heat source device to the hot water storage tank of the cogeneration hot water supply heat source device. A cogeneration hot water source that supplies hot water accumulated in the hot water storage tank using the waste heat of the power generator to the hot water supply, and an auxiliary function that supplies hot water created by heating the water to the hot water supply In the combined hot water supply heat source system provided with a hot water supply heat source device, the control device for controlling the hot water supply operation of the cogeneration hot water supply heat source device and the auxiliary hot water supply heat source device has an upper threshold value corresponding to the amount of stored heat. Value and a lower threshold value that is smaller than that, and the control device has a value corresponding to the heat storage amount of hot water in the hot water storage tank based on the monitor information on the heat storage amount detection of the operating status of the cogeneration hot water supply heat source device. A heat storage amount detection unit to be obtained is provided, and when a value corresponding to the heat storage amount obtained by the heat storage amount detection unit falls below the lower threshold value, a hot water supply heat source is supplied from the hot water storage tank to the auxiliary hot water supply. When the value corresponding to the amount of heat stored in the hot water tank rises above the upper threshold value, the hot water source is changed from the auxiliary hot water source to the cogeneration hot water source. When the hot water source is switched from the hot water storage tank of the cogeneration hot water source device to the auxiliary hot water source device by the control device, the hot water source is switched from the auxiliary hot water source. double if the hot water supply heat source system that is characterized in that the heat source switching blocking portion to continuously supply hot water is finished to prevent the switching of the hot water supply heat source from the auxiliary hot water supply heat source apparatus to the hot water storage tank cogeneration hot water supply heat source device is provided . A cogeneration hot water source that supplies hot water accumulated in the hot water storage tank using the waste heat of the power generator to the hot water supply, and an auxiliary function that supplies hot water created by heating the water to the hot water supply In the combined hot water supply heat source system provided with a hot water supply heat source device, the control device for controlling the hot water supply operation of the cogeneration hot water supply heat source device and the auxiliary hot water supply heat source device has an upper threshold value corresponding to the amount of stored heat. Value and a lower threshold value that is smaller than that, and the control device has a value corresponding to the heat storage amount of hot water in the hot water storage tank based on the monitor information on the heat storage amount detection of the operating status of the cogeneration hot water supply heat source device. A heat storage amount detection unit to be obtained is provided, and when a value corresponding to the heat storage amount obtained by the heat storage amount detection unit falls below the lower threshold value, a hot water supply heat source is supplied from the hot water storage tank to the auxiliary hot water supply. When the value corresponding to the amount of heat stored in the hot water tank rises above the upper threshold value, the hot water source is changed from the auxiliary hot water source to the cogeneration hot water source. A hot water supply heat source selection control unit that performs hot water supply by switching to, and further includes a threshold data change unit that changes threshold data corresponding to the heat storage amount, the threshold data change unit double if the hot water supply heat source system that is characterized in that forms a structure for changing the direction of reducing at least the upper threshold of the upper threshold and the lower threshold value as the water temperature to the hot water storage tank is high . A cogeneration hot water source that supplies hot water accumulated in the hot water storage tank using the waste heat of the power generator to the hot water supply, and an auxiliary function that supplies hot water created by heating the water to the hot water supply In the combined hot water supply heat source system provided with a hot water supply heat source device, the control device for controlling the hot water supply operation of the cogeneration hot water supply heat source device and the auxiliary hot water supply heat source device has an upper threshold value corresponding to the amount of stored heat. Value and a lower threshold value that is smaller than that, and the control device has a value corresponding to the heat storage amount of hot water in the hot water storage tank based on the monitor information on the heat storage amount detection of the operating status of the cogeneration hot water supply heat source device. A heat storage amount detection unit to be obtained is provided, and when a value corresponding to the heat storage amount obtained by the heat storage amount detection unit falls below the lower threshold value, a hot water supply heat source is supplied from the hot water storage tank to the auxiliary hot water supply. When the value corresponding to the amount of heat stored in the hot water tank rises above the upper threshold value, the hot water source is changed from the auxiliary hot water source to the cogeneration hot water source. A hot water supply heat source selection control unit that performs hot water supply by switching to, and further includes a threshold data change unit that changes threshold data corresponding to the heat storage amount, the threshold data change unit double if the hot water supply heat source system that is characterized in that hot water set temperature forms a structure for changing the direction of reducing at least the upper threshold of the upper threshold and the lower threshold value as the lower. A cogeneration hot water source that supplies hot water accumulated in the hot water storage tank using the waste heat of the power generator to the hot water supply, and an auxiliary function that supplies hot water created by heating the water to the hot water supply In the combined hot water supply heat source system provided with a hot water supply heat source device, the control device for controlling the hot water supply operation of the cogeneration hot water supply heat source device and the auxiliary hot water supply heat source device has an upper threshold value corresponding to the amount of stored heat. Value and a lower threshold value that is smaller than that, and the control device has a value corresponding to the heat storage amount of hot water in the hot water storage tank based on the monitor information on the heat storage amount detection of the operating status of the cogeneration hot water supply heat source device. A heat storage amount detection unit to be obtained is provided, and when a value corresponding to the heat storage amount obtained by the heat storage amount detection unit falls below the lower threshold value, a hot water supply heat source is supplied from the hot water storage tank to the auxiliary hot water supply. When the value corresponding to the amount of heat stored in the hot water tank rises above the upper threshold value, the hot water source is changed from the auxiliary hot water source to the cogeneration hot water source. A hot water supply source selection control unit that supplies hot water by switching to, and obtains the amount of hot water used for each time on the time axis with an integer multiple of one day (an integer multiple of 1) as a cycle. A hot water supply usage learning storage unit that learns and stores based on information on the hot water flow rate and time information obtained from the clock mechanism, and a threshold data change unit that changes threshold data corresponding to the heat storage amount, The threshold value data changing unit takes in time data from the clock mechanism and refers to the data in the hot water supply usage learning storage unit so that the upper threshold value and the lower threshold value are set when the hot water usage amount approaches. Little Double if the hot water supply heat source system that is characterized in that forms a structure for changing the direction of reducing the upper threshold with. 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 combined hot water supply heat source system according to any one of claims 2 to 5 , wherein hot water is supplied to a hot water supply destination through the hot water supply passage. The passage of hot water supplied from the hot water storage tank of the cogeneration hot water supply heat source device is connected to the water supply inlet of the auxiliary hot water supply heat source device, and when hot water is supplied using only the hot water of the hot water storage tank, the hot water of the hot water storage tank is driven without heating. The combined hot water supply heat source system according to any one of claims 1 to 6, wherein the hot water supply system is configured to supply hot water to a hot water supply destination via an auxiliary hot water supply heat source device in a state. The selection control unit takes in the detected temperature information of the hot water supplied from the hot water storage tank, and when the detected temperature of the hot water supply is lower than the set hot water temperature, the auxiliary hot water supply heat source device is heated to drive the hot water from the hot water storage tank to the auxiliary hot water supply heat source. The combined hot water supply heat source system according to any one of claims 1 to 7, wherein the system is configured to heat by an apparatus and supply water to a hot water supply destination. When the hot water supply heat source by the control device is switched to the auxiliary hot water supply heat source apparatus from the hot water tank cogeneration hot water supply heat source device, the auxiliary hot-water supply to a continuous feeding hot water from the heat source device is completed auxiliary hot water supply heat source device from cogeneration hot water supply heat source device combined hot water supply heat source system according to any one of claims 1 or claims 3 to 8 heat source switching blocking unit for blocking the switching of the hot-water supply heat source to the hot water storage tank and being provided. A threshold value data changing unit for changing threshold data corresponding to the heat storage amount, and the threshold value data changing unit changes the upper threshold value and the lower threshold value as the water supply temperature to the hot water tank increases; of the composite hot water supply heat source according to any one of claims 1 or claim 2 or claim 4 to claim 9, characterized in that it forms a structure for changing the direction of reducing at least the upper threshold system. A threshold value data changing unit for changing threshold value data corresponding to the heat storage amount, and the threshold value data changing unit is at least an upper threshold value or a lower threshold value as the hot water supply set temperature decreases; The combined hot water supply according to any one of claims 1 or 2, or 3 or claims 5 to 10 , wherein the threshold value is changed in a direction to decrease. Heat source system. The hot water use amount for each time on the time axis having a cycle of an integer multiple of one day (an integer multiple of 1 or more) is learned and stored based on the information on the hot water flow rate obtained from the flow sensor and the time information obtained from the clock mechanism. A hot water supply usage learning storage unit and a threshold data changing unit that changes threshold data corresponding to the amount of stored heat, the threshold data changing unit taking in time data from a clock mechanism, By referring to the data in the learning storage unit, it is configured to change at least the upper threshold value between the upper threshold value and the lower threshold value in the direction of decreasing the time when the hot water use amount increases. The combined hot water supply heat source system according to any one of claims 1 to 4, or any one of claims 6 to 11 . The combined hot water supply system according to any one of claims 1 to 12 , wherein the power generator is a fuel cell that generates electricity by reacting hydrogen and oxygen. The combined hot water supply heat source system according to any one of claims 1 to 13 , wherein the power generation device is a gas engine.

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