JP2005308371A - Hot water supply heat source system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water supply heat source system well convenient for accurately informing a user of the amount of hot water stored in a hot water storage tank of a cogeneration hot water supply heat source device. <P>SOLUTION: The cogeneration hot water supply heat source device utilizes exhaust heat from a generator 1 for supplying hot water stored in the hot water storage tank to a destination. A heat storage amount detecting part 35 finds the heat storage amount of the hot water in the hot water storage tank in accordance with monitoring information about the heat storage amount detected in the operated condition of the cogeneration hot water supply heat source device, and a set temperature corresponding heat stored hot water amount detecting part 37 finds the amount of stored hot water corresponding to the set temperature of supplied hot water. A hot water storage tank heat storage amount display part 38 displays the amount of stored hot water as the heat storage amount corresponding to the set temperature. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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, and the hot water storage tank 2 includes a water supply path 11 that 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. I have. 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 set temperature of, for example, 60 ° C., and is accumulated in the hot water storage tank 2 through the exhaust 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 storage tank 2 is provided below the hot water storage tank 2, and a drainage valve (for example, a drainage electromagnetic valve) 52 is provided in the drainage path 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.

  For example, if the hot water storage tank 2 is entirely filled with hot water having a power generation allowable temperature (for example, 45 ° C. lower than the set temperature) or higher, the cooling water cannot be introduced into the power generation device 1. It cannot generate electricity.

  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. A boundary line between water and hot water in the hot water tank 2 indicated by a 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.

  In such a combined hot water supply heat source system, when the hot water temperature supplied from the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 (for example, the detection temperature of the hot water temperature detection sensor 100) is less than (hot water supply set temperature + 1) ° C., for example. The hot water supply is continued by switching the hot water supply heat source to an auxiliary hot water supply heat source device or heating the hot water supplied from the hot water storage tank 2 by the auxiliary hot water supply heat source device to obtain hot water at a set temperature.

JP2003-120998

  By the way, in the hot water supply heat source system provided with the cogeneration hot water supply heat source device 3 as described above, in order to notify the user, the heat storage amount is displayed on a remote controller or the like.

  The heat storage amount is displayed by displaying the amount of hot water stored, such as how much hot water having a predetermined display temperature is in the hot water storage tank 2 (tank). For example, the heat storage amount is heated by exhaust heat generated during power generation of the power generation device 1. Since the temperature of the hot water stored in the hot water tank 2 is 60 ° C., for example, when the display temperature is set to 60 ° C. and 100 ° C. hot water is stored in the hot water tank 2, The heat storage amount is displayed as “100 L” or “100 L of hot water is in the tank” is displayed.

  In addition to the character display as described above, this display method may be a graphic display corresponding to each fixed amount as shown in FIG. FIG. 7A shows an example of character display corresponding to this graphic display.

  However, when the above display is performed, for example, when the hot water in the hot water tank 2 is cooled to about 48 ° C., the heat storage amount display is “0 L” or “no hot water in the tank”. Since it is performed by display, for example, although the set temperature is 40 ° C. and hot water can be supplied from the hot water storage tank 2, the user thinks that the hot water is supplied from the auxiliary hot water supply heat source device.

  When the display temperature is 50 ° C. and the heat storage amount is displayed as “100 L”, or “100 L of hot water is in the tank” is displayed, for example, the set temperature is 60 ° C. If the auxiliary hot water supply heat source device has to be operated, the user may have the illusion that the auxiliary hot water supply heat source device is operating wastefully even though there is hot water. There was also a problem that was confusing.

  The present invention has been made in order to solve the above-described conventional problems, and the purpose of the present invention is to make it possible to accurately inform the user of the amount of hot water stored in the hot water storage tank of the cogeneration hot water supply heat source device. It is to provide a 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 is 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 a hot water supply destination using exhaust heat of the power generation device, and the operation of the cogeneration hot water supply source A heat storage amount detection unit for obtaining the heat storage amount of hot water in the hot water storage tank based on monitor information relating to the detection of the heat storage amount of the situation, and a setting for obtaining the hot water storage amount corresponding to the hot water supply set temperature based on the heat storage amount detected by the heat storage amount detection unit A configuration having a temperature-corresponding hot water storage amount detection unit and a hot water storage tank heat storage amount display unit that displays the hot water storage amount obtained by the set temperature-corresponding hot water storage amount detection unit as a heat storage amount corresponding to the set temperature is a means for solving the problem.

  Further, in the second invention, in addition to the configuration of the first invention described above, the amount of hot water stored corresponding to the hot water set temperature is determined by directly supplying hot water in the hot water tank or by adding water to the hot water in the hot water tank. Thus, a configuration with the amount of hot water set at a hot water supply set temperature obtained by doing is used as means for solving the problem.

  Furthermore, in the third aspect of the invention, in addition to the configuration of the first or second aspect of the invention, the set temperature-corresponding stored hot water amount detecting unit changes the amount of stored hot water corresponding to the hot water set temperature when the hot water set temperature is changed. The hot water storage temperature is converted according to the hot water supply set temperature, and the converted value is displayed on the hot water storage tank heat amount display unit as means for solving the problem.

  Furthermore, in addition to the structure of the said 1st, 2nd, or 3rd invention, 4th invention is between the hot water storage tank of the said cogeneration hot-water supply heat source device, and an electric power generation apparatus. Means is provided for heating the water in the hot water storage tank using the heat of the exhaust heat absorbing fluid of the apparatus to make hot water, accumulating the hot water formed by the means in the hot water storage tank, A configuration for supplying a hot water supply destination through a hot water supply path and a configuration for solving the problem are provided.

  Further, the fifth invention is an auxiliary hot water supply heat source device 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. Is connected to the cogeneration hot water supply heat source device, and the hot water passage fed 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 only hot water from the hot water storage tank is used as the heat source. When the hot water is stored, the hot water in the hot water storage tank is configured to supply hot water to the hot water supply destination via the auxiliary hot water supply heat source device in a non-heated drive state, and is a means for solving the problem.

  Furthermore, in addition to the configuration of any one of the first to fifth inventions, the sixth invention provides a hot water storage tank when the temperature of the hot water stored in the hot water storage tank is lower than the hot water supply set temperature. The hot water is heated by the auxiliary hot water supply heat source device to supply hot water to the hot water supply destination as the set temperature hot water, and an auxiliary hot water supply operation presence / absence distinguishing display section for displaying whether or not the auxiliary hot water supply heat source device operates is provided. It is a means for solving the problems with the configuration.

  Furthermore, the seventh invention is the hot water supply setting when the temperature of the hot water stored in the hot water storage tank is lower than the hot water supply set temperature in addition to the configuration of any one of the first to sixth inventions. If the hot water in the hot water tank can be used if the temperature is changed to lower, the indication that the hot water in the hot water tank can be obtained by changing the set temperature low and the hot water in the hot water tank are used. A configuration having a set temperature change promotion related display unit that performs at least one of the displays indicating the set temperature change information for enabling the setting temperature is used as means for solving the problem.

  Furthermore, an eighth invention solves the problem 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 seventh inventions. As a means.

  According to the present invention, the heat storage amount detection unit obtains the heat storage amount of the hot water in the hot water storage tank based on the monitor information related to the heat storage amount detection of the operation status of the cogeneration hot water supply heat source device, and based on the heat storage amount, The hot water amount detection unit calculates the amount of hot water stored corresponding to the hot water supply set temperature, and this value is displayed on the hot water storage amount display unit as the amount of heat stored corresponding to the set temperature, so the user can determine how much hot water is stored in the hot water storage tank. Therefore, it is possible to accurately determine whether the water is in a hot water supply system that is very easy to use.

  Further, in the present invention, the amount of hot water stored corresponding to the hot water set temperature is the amount of hot water at the hot water set temperature obtained by directly supplying hot water in the hot water tank or by adding water to the hot water in the hot water tank. According to the configuration, the amount of hot water stored corresponding to the hot water set temperature can be accurately determined, and the user can accurately determine how much hot water at the set temperature can be supplied using hot water from the hot water tank. This makes it possible to realize a hot water supply heat source system that is even easier to use.

  Further, in the present invention, when the hot water set temperature is changed, the set temperature corresponding stored hot water amount detection unit converts the hot water amount corresponding to the hot water set temperature in accordance with the changed hot water set temperature, and converts the converted value into the hot water storage tank. According to the configuration displayed by the heat storage amount display unit, it is possible to realize an even more convenient hot water supply heat source system that can accurately respond to changes in the hot water supply set temperature.

  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 inlet of the auxiliary hot water supply heat source device, and when hot water is supplied using only the hot water in the hot water storage tank as a heat source, the auxiliary hot water supply heat source device in a state where the hot water in the hot water storage tank is not heated is used. According to the configuration in which hot water is supplied to the hot water supply destination via the hot water supply passage 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, a complex system with a simple system configuration can be obtained. It is possible to form hot water efficiently.

  Furthermore, in the present invention, when the temperature of the hot water stored in the hot water tank is lower than the hot water supply set temperature, the hot water in the hot water tank is heated by the auxiliary hot water supply heat source device to supply hot water to the hot water supply destination as hot water at the set temperature. According to the configuration including the auxiliary hot water supply operation presence / absence distinguishing display section for distinguishing whether or not the auxiliary hot water supply heat source device is operated, the user can accurately determine whether the auxiliary hot water supply heat source device is operating or not. To be able to judge.

  Furthermore, in the present invention, when the temperature of the hot water stored in the hot water tank is lower than the hot water set temperature, a display indicating that the hot water in the hot water tank can be obtained by changing the set temperature low According to the configuration having the set temperature change promotion related display unit that performs at least one of the displays indicating the set temperature change information for making the hot water in the hot water tank available, this display prompts the user to lower the set temperature. As a result, the hot water storage tank can be used as a heat source to increase the use ratio of the hot water in the hot water storage tank, so that more economical operation is possible.

  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.

  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 heat source system 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. A plurality of hot water supply destinations including a bathtub are provided. 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 environment-friendly hot water supply heat source system can be constructed.

  The capacity of the hot water tank 2 is not particularly limited and is appropriately set. In the present embodiment, the capacity of the hot water tank 2 is, for example, 200 L, and the hot water tank 2 has a space therebetween. Hot water temperature detection sensors 101 to 111 in the hot water tank are provided.

  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.

  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 formed by an electromagnetic valve, and the hot water proportional valves 55 and 56 are 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. 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 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, and a set temperature corresponding hot water storage amount detection unit 37, and displays a heat storage amount display of a hot water tank provided in a remote controller or the like. The unit 38, the hot water supply set temperature setting operation unit 39, and the auxiliary hot water supply operation presence / absence distinguishing display unit 40 are connected.

  The hot water supply set temperature setting operation unit 39 operates to set the hot water supply set temperature in accordance with an operation by a user or the like, and includes buttons and the like for operation.

  The heat storage amount detection unit 35 obtains the heat storage amount of the hot water in the hot water tank 2 based on the monitor information regarding the heat storage amount detection 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 way, the heat storage amount detection unit 35 can detect the amount of hot water accumulated 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 selects, for example, a hot water supply heat source based on the heat storage amount obtained by the heat storage amount detection unit 35 and a hot water supply set temperature setting operation unit 39. To do.

  When the hot water temperature in the hot water storage tank 2 is equal to or higher than the hot water supply set temperature, the selection control unit 36 selects only the hot water storage tank 2 as the hot water supply heat source and supplies the hot water in the hot water storage tank 2 to the hot water supply destination. In this embodiment, a 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 a water supply inlet of the auxiliary hot water supply heat source device 4, and the hot water storage tank When only hot water of No. 2 is used as a heat source and hot water of a set temperature or higher is sent from the hot water storage tank 2, the hot water of 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.

  That is, the selection control unit 36 opens the hot water on / off valve 54 when supplying hot water using the hot water in the hot water tank 2 as a heat source, and when the hot water set temperature and the hot water temperature in the hot water tank 2 match, When the temperature of the hot water in the hot water storage tank 2 is higher than the set hot water temperature, the opening amounts of the hot water proportional valves 55 and 56 are adjusted as appropriate. The hot water in the hot water storage tank 2 is mixed with the 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 as hot water having a set temperature. And the auxiliary hot water supply heat source apparatus 4 supplies the hot water sent from the said hot water storage tank 2 side to the hot water supply destination in the non-heating drive state.

  As described above, when hot water having a set temperature introduced into the auxiliary hot water supply heat source device 4 is supplied to the hot water supply destination in a non-heated driving state, the hot water path switching valve 58 is switched and the kitchen or the like is passed through the branch passage 90. Hot water is appropriately supplied by supplying hot water to an appropriate hot water supply destination or by opening the hot water on-off valve 59 and filling the hot water through the bath pouring introduction passage 95 and the hot water filling passage.

  In addition, when the hot water temperature in the hot water storage tank 2 is lower than the hot water supply set temperature, the selection control unit 36 selects the hot water storage tank 2 as a hot water supply heat source, and hot water introduced from the hot water storage tank 2 to the auxiliary hot water supply heat source device 4. Is commanded to the combustion control unit 42 to be heated by the auxiliary hot water supply heat source device 4. Thus, in this embodiment, when the temperature of the hot water stored in the hot water tank 2 is lower than the hot water supply set temperature, the hot water in the hot water tank 2 is heated by the auxiliary hot water supply heat source device 4 and set temperature. It is configured to supply hot water to the hot water supply as no hot water.

  The combustion control unit 42 opens at least one of the gas on-off valves 81, 82, 83 while referring to the detected flow rate of the flow rate sensor 73 when the selection control unit 36 instructs the operation of the auxiliary hot water supply heat source device 4. The amount of gas supplied to the burner 6 is adjusted by adjusting the valve opening amount of the gas proportional valve 86, and the air volume of the combustion fan 8 is adjusted so that the hot water discharged through the hot water supply heat exchanger 19 is set at a set temperature. Combustion control of the burner 6 is performed so that it becomes hot water.

  In the present embodiment, when the temperature of the hot water stored in the hot water tank 2 is lower than the hot water supply set temperature, the auxiliary hot water supply heat source device 4 can be operated by changing the hot water supply set temperature to a lower direction. In the case where the hot water in the hot water tank 2 can be directly used without any change, an indication that the hot water in the hot water tank 2 can be obtained by changing the set temperature to a lower temperature and the hot water in the hot water tank 2 can be used. A set temperature change promotion related display unit that performs at least one of the displays indicating the set temperature change information for doing so may be provided.

  In this case, the set temperature change promotion related display unit turns on and blinks a lamp for promoting a decrease in hot water set temperature, for example, as a display indicating that hot water in the hot water tank 2 can be obtained by changing the set temperature to be low. Character display such as “You can use the hot water tank by lowering the set temperature by 2 ° C” as a display that shows the set temperature change information to make hot water in the hot water tank 2 available. Or just go.

  The set temperature-corresponding stored hot water amount detection unit 37 obtains the stored hot water amount corresponding to the hot water supply set temperature based on the heat storage amount detected by the heat storage amount detection unit 35. In the present embodiment, the amount of hot water stored corresponding to the hot water set temperature is the hot water of the hot water set temperature obtained by directly supplying hot water in the hot water tank 2 or adding hot water to the hot water in the hot water tank 2 to supply hot water. The amount is determined by the following equation (1).

  Heat storage amount corresponding to set temperature Qs = Qt × (Tt−Tw) / (Ts−Tw) (1)

  Here, Qt is the amount of heat stored at the temperature in the hot water tank (the amount of hot water stored at the temperature of the hot water in the hot water tank), Tt is the temperature of the hot water in the hot water tank, Ts is the set hot water temperature, and Tw is the hot water temperature.

  The hot water storage tank heat storage amount display unit 38 displays the hot water storage amount obtained by the set temperature corresponding hot water storage amount detection unit 37 as the heat storage amount corresponding to the set temperature. In addition, when the hot water supply set temperature is changed by the operation of the hot water supply set temperature setting operation unit 39, the set temperature corresponding hot water storage amount detection unit 37 causes the stored hot water amount corresponding to the hot water supply set temperature to correspond to the changed hot water supply set temperature. The converted value is displayed on the hot water storage tank heat storage amount display unit 38. Appropriate displays such as character display and graphic display as shown in FIGS. 7A and 7B can be applied to these display methods.

  For example, in Table 1, the temperature of the hot water in the hot water tank 2 (heat storage temperature) and the heat storage amount display with respect to the amount of hot water are shown in comparison with the conventional system along with the movement of the system. Here, the conventional system is configured to display the amount of hot water of 50 ° C. or more as the heat storage amount, and the calculation of the hot water storage amount corresponding to the set temperature for the heat storage amount display of the present embodiment example is as follows. Asking.

  The auxiliary hot water supply operation presence / absence distinguishing display unit 40 takes in the hot water supply heat source selection signal of the selection control unit 36 and displays whether or not the auxiliary hot water supply heat source device 4 operates. That is, the auxiliary hot water supply operation presence / absence distinguishing display unit 40 displays an appropriate display (for example, lighting or blinking of the lamp) that indicates that the auxiliary hot water supply heat source device 4 is operating when the distinguishing display is ◯ in Table 1, for example. , Character display, etc.).

  The present embodiment is configured as described above, and the heat storage amount detection unit 35 obtains the heat storage amount of hot water in the hot water tank 2 based on the monitor information related to the heat storage amount detection of the operation status of the cogeneration hot water supply heat source device 3. Based on this amount of stored heat, the set temperature corresponding stored hot water amount detection unit 37 calculates the amount of stored hot water corresponding to the hot water supply set temperature.

  The hot water storage heat storage amount display unit 38 displays this value as the heat storage amount corresponding to the set temperature. This value is the amount of hot water at a hot water supply set temperature obtained by directly supplying hot water in the hot water tank 2 or adding hot water to the hot water in the hot water tank 2 to supply hot water. For example, as shown in Table 1 Since the amount of stored hot water corresponding to the hot water supply set temperature can be obtained accurately, the user can accurately determine the amount of hot water in the hot water tank 2 corresponding to the set temperature. .

  That is, according to the present embodiment, the user quickly and accurately determines how much hot water at the hot water supply set temperature can be supplied using the hot water stored in the hot water storage tank 2. It is possible to realize a hot water source system that is very easy to use.

  Further, in the present embodiment example, when the hot water set temperature is changed, the set temperature corresponding stored hot water amount detection unit 37 converts the hot water stored amount corresponding to the hot water set temperature in accordance with the changed hot water set temperature, and this conversion Since the value is displayed by the hot water storage heat storage amount display unit 38, it is possible to realize an even more user-friendly hot water supply system that can accurately respond to changes in the hot water supply set temperature.

  Furthermore, according to the present embodiment example, the auxiliary hot water supply operation presence / absence distinguishing display unit 40 displays whether or not the auxiliary hot water supply heat source device 4 is operated. Can be accurately determined.

  Furthermore, according to this embodiment, the hot water formed by the means arranged between the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 and the power generator 1 is accumulated in the hot water storage tank, and the hot water in the hot water storage tank 2 is stored. Is supplied to the hot water supply destination through the hot water supply path provided in the hot water storage tank 2, so that hot water accumulation by the cogeneration hot water supply heat source device 3 and hot water supply from the hot water storage tank 2 can be performed efficiently.

  Furthermore, according to this embodiment, since it is a complex hot water supply heat source system having the cogeneration hot water supply heat source device 3 and the auxiliary hot water supply heat source device 4, the hot water supply operation is performed using the cogeneration hot water supply heat source device 3 as the hot water supply heat source. Therefore, a hot water supply system that can save energy 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 only 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 device 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 to the hot water supply inlet of the auxiliary hot water supply heat source device 4, a complex hot water supply heat source system with a simple system configuration can be formed, 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 auxiliary hot water supply operation presence / absence distinguishing display unit 40 is provided to display whether or not the auxiliary hot water supply heat source device 4 is operated, but the auxiliary hot water supply heat source device 4 may be omitted.

  Moreover, in the said embodiment, although the cogeneration hot water supply heat source apparatus 3 was set as the structure which has one hot water storage tank 2, as shown in FIG. 3, a plurality of hot water storage tanks 2 are connected in series, and a cogeneration hot water supply heat source is provided. The device 3 may be formed.

  Furthermore, in the above embodiment, the power generation device 1 of the cogeneration hot water supply heat source device 3 is a fuel cell. However, a gas turbine power generation device, a diesel engine power generation device, or the like can be applied to the power generation device 1, and What is necessary is just to heat-store in the hot water tank 2 using waste heat. The fuel and configuration of the power generation device 1 are not particularly limited, and are appropriately set.

  Further, in the above embodiment, the water in the hot water storage tank 2 is heated to be hot water between the hot water storage tank 2 of the cogeneration hot water supply heat source device 3 and the power generation apparatus 1 using the exhaust heat of the power generation 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. In this case, for example, a configuration unique to the combined hot water supply system such as the selection control unit 36 is omitted.

It is a principal part block diagram which shows the control structure of one Embodiment of the 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 Example of the 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 of the hot-water supply heat source system which concerns on this invention. It is explanatory drawing which shows the example of a connection of the electric power generating apparatus and hot water storage tank in 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. It is explanatory drawing which shows the example of the character display of a heat storage amount, and a graphic display.

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 35 Heat storage amount detection part 36 Selection control part 37 Set temperature corresponding | compatible hot water storage amount detection part 38 Hot water storage heat amount display part 39 Hot water supply setting temperature setting operation 40 Auxiliary hot water supply operation presence / absence display unit 41 Clock mechanism 42 Combustion control unit 44 Controller 70, 73 Flow rate sensor

Claims (8)

  In hot water supply heat source system comprising a cogeneration hot water supply heat source device that supplies hot water accumulated in a hot water storage tank to the hot water supply destination using the exhaust heat of the power generation device, monitor information related to detection of the amount of heat stored in the operation status of the cogeneration hot water supply heat source device A heat storage amount detection unit for obtaining the heat storage amount of hot water in the hot water storage tank, a set temperature corresponding heat storage hot water amount detection unit for obtaining the hot water storage amount corresponding to the hot water supply set temperature based on the heat storage amount detected by the heat storage amount detection unit, and A hot water supply heat source system comprising: a hot water storage tank heat storage amount display unit that displays the amount of hot water storage determined by the set temperature-corresponding stored hot water amount detection unit as a heat storage amount corresponding to the set temperature.   The amount of stored hot water corresponding to the set temperature of hot water supply is the amount of hot water of the set temperature of hot water obtained by directly supplying hot water in the hot water tank or by adding water to the hot water in the hot water tank. The hot water supply heat source system according to claim 1.   When the hot water set temperature is changed, the set temperature compatible hot water storage amount detection unit converts the hot water storage amount corresponding to the hot water set temperature to correspond to the changed hot water set temperature, and the hot water storage heat storage amount display unit displays this converted value. The hot water supply heat source system according to claim 1 or 2, wherein   Means for heating the water in the hot water storage tank between the hot water storage tank of the cogeneration hot water supply heat source device and the power generation apparatus by using the exhaust heat of the power generation apparatus or the heat of the exhaust heat absorbing fluid of the power generation apparatus to make hot water 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 configured to be supplied to a hot water supply destination through the hot water supply passage. The hot water supply heat source system according to claim 2 or claim 3.   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 attached to 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 introduction port of the auxiliary hot water supply heat source device. The hot water supply system according to any one of claims 1 to 4, wherein the hot water supply system is configured to supply hot water.   When the temperature of the hot water stored in the hot water storage tank is lower than the hot water supply set temperature, the hot water in the hot water storage tank is heated by the auxiliary hot water source to supply the hot water to the hot water supply destination. 6. A hot water supply heat source system according to claim 5, further comprising an auxiliary hot water supply operation presence / absence distinguishing display section for distinguishing whether or not the auxiliary hot water supply heat source device is operated.   When the temperature of the hot water stored in the hot water storage tank is lower than the hot water supply set temperature, the hot water in the hot water storage tank is heated by the auxiliary hot water source to supply the hot water to the hot water supply destination. If the temperature of the hot water stored in the hot water tank is lower than the hot water supply set temperature, the hot water in the hot water tank can be used without operating the auxiliary hot water source if the hot water set temperature is changed to a lower direction. If possible, at least one of a display indicating that hot water in the hot water tank can be obtained by changing the set temperature to a lower level and a display indicating information on changing the set temperature for making the hot water in the hot water tank available. The hot-water supply heat source system according to claim 5, further comprising a set temperature change promotion related display unit that performs the operation.   The hot water supply heat source system according to any one of claims 1 to 7, wherein the power generation device is a fuel cell that generates electricity by reacting hydrogen and oxygen.

Images