JP2012032061A - Heat supply equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously execute hot-water supply operation and heat consumption operation while improving energy saving by effectively utilizing hot water stored in a hot water tank.SOLUTION: An operation control means D is configured to execute: hot-water supply operation for supplying hot water having passed through an auxiliary heating device 3 to hot-water use places 4 and 10 by a hot-water supply means B, by setting the target heating temperature of the auxiliary heating device 3 to a first target temperature corresponding to a hot-water set temperature; and heat consumption operation for circulating and supplying hot water having passed through the auxiliary heating device 3 to a heat consumption heat exchanger 5 by a heat consumption circulation supplying means C, by setting the target heating temperature to a second target temperature corresponding to a heat consumption set temperature higher than the first target temperature. Also, the operation control means D is configured to execute low-temperature setting control for setting the target heating temperature to a temperature that is lower than the second target temperature and equal to or higher than the first target temperature, when there is hot water whose temperature is equal to or higher than the hot-water set temperature, in the hot water tank 2 during simultaneous execution of the hot-water supply operation and the heat consumption operation.

Description

  The present invention provides hot water storage means for freely storing hot water heated by exhaust heat of a heat supply device in a hot water storage tank, hot water in the hot water storage tank is passed through an auxiliary heating device, and water is supplied to the hot water after the passage. Hot water supply means that can be supplied to a hot water use location in a mixable state, heat consumption circulation supply means that can freely supply hot water heated by the same auxiliary heating device to a heat exchanger for heat consumption, and the auxiliary heating device And an operation control means for controlling the operation of the hot water supply means and the heat consumption circulation supply means.

  The heat supply equipment as described above stores hot water heated by exhaust heat from a heat supply device such as a fuel cell or a gas engine in a hot water storage tank, and uses hot water stored in the hot water storage tank to supply hot water. In addition to supplying hot water to the location, the hot water heated by the auxiliary heating device is circulated and supplied to the heat exchanger for heat consumption, so that heat is consumed in the heat consuming part such as a heating terminal.

  In the conventional heat supply equipment, the hot water supply means includes a mixing unit that mixes water with hot water that has passed through the auxiliary heating device, and in this mixing unit, water is mixed with the hot water that has passed through the auxiliary heating device. By doing so, hot water having a hot water supply set temperature is supplied to the hot water supply use location. The heat medium is circulated between the heat consuming unit such as a heating terminal and the heat consuming heat exchanger, and the heat medium heated by the heat consuming heat exchanger is circulated and supplied to the heat consuming unit. The heat consumption unit is configured to perform heat consumption. When there is a hot water supply request from the hot water use location, the operation control means performs a hot water supply operation in which hot water that has passed through the auxiliary heating device is supplied to the hot water use location by the hot water supply means, and a heat consumption request is received from the heat consumption unit such as a heating terminal. If it exists, the heat consumption operation | movement which supplies the hot water which passed the auxiliary | assistant heating apparatus to the heat exchanger for heat consumption in a heat consumption circulation supply means will be performed (for example, refer patent document 1).

  In the facility described in Patent Document 1, in the hot water supply operation, the operation control means sets the target heating temperature by the auxiliary heating device as the first target temperature higher than the hot water supply set temperature required at the hot water use location, and performs auxiliary heating. The operation of the auxiliary heating device is controlled so that the temperature of the hot water passing through the device becomes the first target temperature. Thereby, even when the temperature of the hot water stored in the hot water storage tank is lower than the hot water supply set temperature, the temperature of the hot water that has passed through the auxiliary heating device by the heating operation of the auxiliary heating device is higher than the hot water supply set temperature. The amount of water mixed by the mixing unit is adjusted with respect to the hot water that has passed through this auxiliary heating device, and hot water at a hot water supply set temperature is supplied to the hot water supply use location. Also, when the temperature of the hot water stored in the hot water storage tank is higher than the hot water supply set temperature, the operation control means passes the auxiliary heating device as it is without heating the auxiliary heating device, and the auxiliary heating device is turned on. The hot water passing through the auxiliary heating device is supplied as it is, or the amount of water mixed by the mixing unit is adjusted with respect to the hot water passing through the auxiliary heating device, and hot water at a hot water supply set temperature is supplied to the hot water supply use location.

  A heat consumption unit such as a heating terminal is required to have a heat consumption set temperature (for example, about 60 to 80 ° C.) higher than a hot water supply set temperature (for example, about 40 ° C.) required at a hot water use location. Therefore, in the facility described in Patent Document 1, in the heat consumption operation, the operation control unit sets the target heating temperature by the auxiliary heating device to a second target temperature (for example, a heat consumption setting temperature higher than the first target temperature). The hot water heated to the second target temperature by the auxiliary heating device is circulated and supplied to the heat exchanger for heat consumption.

  In the facility described in Patent Document 1, when the hot water supply operation and the heat consumption operation are performed at the same time, the hot water storage tank has hot water that is higher than a first predetermined temperature (for example, 50 ° C.) higher than the hot water supply set temperature. If the hot water storage tank has hot water of a first predetermined temperature (for example, 50 ° C.) or higher, the target heating temperature by the auxiliary heating device is set to the second target which is a condition of heat consumption operation such as heating operation. The temperature is set (for example, about 80 ° C.).

JP 2004-257367 A

  In the facility described in Patent Document 1, when the hot water supply operation and the heat consumption operation are performed simultaneously as described above, if the temperature of the hot water stored in the hot water storage tank is equal to or higher than the hot water supply set temperature, auxiliary heating is performed. The target heating temperature by the apparatus is set to the second target temperature (for example, about 80 ° C.). Thereby, a part of the hot water of the second target temperature that has passed through the auxiliary heating device is supplied to the hot water use location by the hot water supply means, and a part of the remaining hot water of the second target temperature that has passed through the auxiliary heating device Is supplied to the heat exchanger for heat consumption by the heat consumption circulation supply means. Here, a part of the hot water of the second target temperature that has passed through the auxiliary heating device is supplied to the hot water supply use location by the hot water supply means. At this time, hot water at the hot water supply set temperature or higher is supplied to the auxiliary heating device. After heating to the second target temperature, which is considerably higher than that, a large amount of water is mixed and the temperature is lowered to the hot water supply set temperature. Therefore, the hot water storage tank is not heated by the auxiliary heating device, but hot water of the hot water set temperature or higher that can be supplied as it is to the hot water use location is stored, but the hot water is stored in the auxiliary heating device. Heating to the second target temperature wasted, leading to an increase in energy consumption in the auxiliary heating device, and the hot water stored in the hot water storage tank could not be used effectively.

  The present invention has been made paying attention to such a point, and its purpose is to effectively utilize hot water stored in a hot water storage tank when performing hot water supply operation and heat consumption operation at the same time to save energy. It is in the point which provides the heat supply equipment which can perform the heat consumption by the hot water supply to a hot-water supply use location, a heat consumption part, etc., aiming at improvement of this.

In order to achieve this object, the heat supply equipment according to the present invention is characterized by a hot water storage means for freely storing hot water heated by exhaust heat of the heat supply device in a hot water storage tank, and assisting the hot water in the hot water storage tank. A hot water supply means that can be supplied to a hot water supply location in a state where water can be mixed with hot water after passing through the heating device, and hot water heated by the same auxiliary heating device is used as a heat exchanger for heat consumption. A heat supply facility comprising: a heat consumption circulation supply means which can be circulated freely; and an operation control means for controlling the heating operation of the auxiliary heating device and the operation of the hot water supply means and the heat consumption circulation supply means. ,
The operation control means sets a target heating temperature by the auxiliary heating device to a first target temperature corresponding to a hot water supply set temperature, and supplies hot water that has passed through the auxiliary heating device to the hot water supply use location by the hot water supply means. Hot water supply operation, and the target heating temperature is set to a second target temperature corresponding to a heat consumption setting temperature higher than the first target temperature, and the hot water passed through the auxiliary heating device by the heat consumption circulation supply means When the hot water supply operation and the heat consumption operation are performed at the same time, hot water above the hot water supply set temperature is received in the hot water storage tank. When it exists, it is in the point which is comprised so that the said target heating temperature may be set to the low temperature side setting control which is lower than the said 2nd target temperature and more than the said 1st target temperature.

  According to this characteristic configuration, in the hot water supply operation, the target heating temperature by the auxiliary heating device is set to the first target temperature corresponding to the hot water supply set temperature, so that the operation control means performs the hot water supply operation, Thus, hot water at the hot water supply set temperature can be supplied to the hot water supply use location by, for example, mixing water with hot water at the first target temperature that has passed through the auxiliary heating device. In the heat consumption operation, since the target heating temperature by the auxiliary heating device is set to the second target temperature corresponding to the heat consumption setting temperature higher than the first target temperature, the operation control means performs the heat consumption operation. Thus, the hot water having the second target temperature that has passed through the auxiliary heating device by the heat consumption circulation supply means can be supplied to the heat exchanger for heat consumption. Thereby, for example, in a facility that circulates a heat medium between a heat exchanger for heat consumption and a heat consumption part such as a heating terminal, the heat medium heated by the heat exchanger for heat consumption circulates to the heat consumption part. The heat consumption in the heat consuming unit can be performed.

  Further, according to the present feature configuration, when the hot water supply operation and the heat consumption operation are performed simultaneously, if hot water having a hot water supply temperature or higher exists in the hot water storage tank, the operation control means sets the target heating temperature to be higher than the second target temperature. Also, low temperature side setting control for setting the low temperature side and the first target temperature or higher is performed. By performing this low temperature side setting control, the temperature difference between the target heating temperature and the temperature of the hot water in the hot water storage tank can be reduced rather than setting the target heating temperature to the second target temperature as in the equipment described in Patent Document 1 above. For example, when the target temperature is set to the first target temperature by the low temperature side setting control, the temperature of the hot water in the hot water storage tank may be higher than the target heating temperature. Thereby, when hot water is heated by the auxiliary heating device, it is not necessary to heat the auxiliary heating device to a considerably high temperature such as the second target temperature, the target heating temperature by the auxiliary heating device and the temperature of the hot water in the hot water storage tank. Therefore, hot water at the hot water supply set temperature can be supplied to the hot water supply use location while reducing the energy consumption in the auxiliary heating device. Moreover, if the temperature of the hot water in the hot water storage tank is higher than the target heating temperature by the auxiliary heating device, the hot water at the hot water supply set temperature can be supplied to the hot water supply use location without being heated by the auxiliary heating device. Therefore, when performing hot water supply operation and heat consumption operation at the same time, the hot water stored in the hot water storage tank is effectively utilized to improve energy saving, while the hot water supply to the hot water use location and the heat consumption part etc. It is possible to realize a heat supply facility that can perform heat consumption.

  Here, when performing the hot water supply operation and the heat consumption operation at the same time, if hot water having a temperature higher than the hot water supply set temperature exists in the hot water storage tank, an operation mode in which the low temperature side setting control is performed is possible. Since the operation is intended for a heat receiving body having a somewhat large heat capacity and low thermal response, the hot water supply operation is relatively short in this heat consumption operation, and therefore, the temperature is lower than the second target temperature for the heat consumption operation. This is because even if a target value equal to or higher than the first target temperature for hot water supply operation is used as the target heating temperature by the auxiliary heating device, the influence on the heat consumption operation is small.

  According to a further characteristic configuration of the heat supply facility according to the present invention, the operation control means starts the hot water supply operation during the execution of the heat consumption operation and simultaneously performs the hot water supply operation and the heat consumption operation. In the low temperature side setting control, the target heating temperature is set to the first target temperature during execution of the hot water supply operation.

  According to this feature configuration, when the hot water supply operation and the heat consumption operation are performed simultaneously by starting the hot water supply operation during execution of the heat consumption operation, the operation control means executes the hot water supply operation in the low temperature side setting control. Since the target heating temperature is set to the first target temperature, the temperature difference between the target heating temperature and the temperature of the hot water in the hot water storage tank can be reduced during the hot water supply operation, or the hot water storage is lower than the target heating temperature. The temperature of the hot water in the tank can be increased, and the hot water stored in the hot water storage tank can be used effectively to appropriately reduce the energy consumption by the auxiliary heating device, and to the hot water use location Hot water can be supplied. Then, since the target heating temperature is set to the first target temperature because the hot water supply operation is being executed, the operation control means may set the target heating temperature to the second target temperature when the hot water supply operation is stopped. It is possible to supply the hot water of the second target temperature that has passed through the auxiliary heating device by the heat consumption circulation supply means to the heat exchanger for heat consumption, and to appropriately perform the heat consumption in the heat consumption section or the like.

  According to a further characteristic configuration of the heat supply facility according to the present invention, the operation control means starts the hot water supply operation during the execution of the heat consumption operation and simultaneously performs the hot water supply operation and the heat consumption operation. In the low temperature side setting control, the target heating temperature is set to a temperature between the first target temperature and the second target temperature during execution of the hot water supply operation.

  According to this feature configuration, when the hot water supply operation and the heat consumption operation are performed simultaneously by starting the hot water supply operation during execution of the heat consumption operation, the operation control means executes the hot water supply operation in the low temperature side setting control. Since the target heating temperature is set to a temperature between the first target temperature and the second target temperature, the temperature difference between the target heating temperature and the temperature of the hot water in the hot water storage tank is reduced during the hot water supply operation. The hot water stored in the hot water storage tank can be used effectively, and hot water can be supplied to the hot water use location while appropriately reducing energy consumption in the auxiliary heating device. The target heating temperature is set to a temperature between the first target temperature and the second target temperature because the hot water supply operation is being performed. Therefore, when the operation control means stops the hot water supply operation, the target heating temperature is set. Can be set to the second target temperature, and the hot water at the second target temperature that has passed through the auxiliary heating device by the heat consumption circulation supply means is supplied to the heat exchanger for heat consumption, and the heat in the heat consumption section etc. Consumption can be performed appropriately.

  According to a further characteristic configuration of the heat supply facility according to the present invention, the operation control means starts the hot water supply operation during the execution of the heat consumption operation and simultaneously performs the hot water supply operation and the heat consumption operation. In the low temperature side setting control, when the state where the target heating temperature is set lower than the second target temperature and equal to or higher than the first target temperature is continued for a set duration, the target heating temperature is set to the second temperature. The configuration is such that the target temperature is changed and set.

  As described above, when the target heating temperature by the auxiliary heating device is set to be lower than the second target temperature and equal to or higher than the first target temperature, the temperature of the hot water supplied to the heat exchanger for heat consumption decreases. Therefore, if the state in which the target heating temperature by the auxiliary heating device is set lower than the second target temperature and higher than the first target temperature is continued for a long time, the heat consumption in the heat consuming unit or the like cannot be appropriately performed. there is a possibility. Therefore, according to this characteristic configuration, the operation control means continues setting in a state where the target heating temperature by the auxiliary heating device is set lower than the second target temperature and higher than the first target temperature in the low temperature side setting control. If the time is continued, the target heating temperature by the auxiliary heating device is changed to the second target temperature, so the temperature of the hot water circulated to the heat exchanger for heat consumption is set as the second target temperature, and the heat consuming part, etc. The heat consumption in can be done appropriately. Therefore, when performing hot water supply operation and heat consumption operation at the same time, the hot water stored in the hot water storage tank is effectively utilized to improve energy efficiency and hot water is supplied to the hot water use location. Heat consumption in the consumption unit or the like can be appropriately performed.

  According to a further characteristic configuration of the heat supply facility according to the present invention, the operation control unit starts the heat consumption operation during the hot water supply operation and simultaneously performs the hot water supply operation and the heat consumption operation. In the low temperature side setting control, when the set time elapses after setting the target heating temperature to the second target temperature, the target heating temperature is changed to the first target temperature. .

  According to this feature configuration, when the hot water supply operation and the heat consumption operation are simultaneously performed by starting the heat consumption operation during the hot water supply operation, the operation control means first performs auxiliary heating in the low temperature side setting control. Since the target heating temperature by the apparatus is set to the second target temperature, at the beginning of the heat consumption operation, the temperature of the hot water circulated to the heat exchanger for heat consumption is set as the second target temperature, and the heat consumption unit etc. Heat consumption can be appropriately performed. The operation control means changes the target heating temperature to the first target temperature after the setting time has elapsed after setting the target heating temperature to the second target temperature in the low temperature side setting control. The temperature difference from the temperature of the hot water in the tank can be reduced, or the temperature of the hot water in the hot water storage tank can be made higher than the target heating temperature, and the hot water stored in the hot water storage tank can be used effectively. In addition, hot water can be supplied to a hot water use location while appropriately reducing energy consumption in the auxiliary heating device.

  According to a further characteristic configuration of the heat supply facility according to the present invention, the operation control unit starts the heat consumption operation during the hot water supply operation and simultaneously performs the hot water supply operation and the heat consumption operation. In the low temperature side setting control, when the set time elapses after the target heating temperature is set to the second target temperature, the target heating temperature is changed to a temperature between the first target temperature and the second target temperature. In that it is configured to set.

  According to this feature configuration, when the hot water supply operation and the heat consumption operation are simultaneously performed by starting the heat consumption operation during the hot water supply operation, the operation control means first performs auxiliary heating in the low temperature side setting control. Since the target heating temperature by the apparatus is set to the second target temperature, at the beginning of the heat consumption operation, the temperature of the hot water circulated to the heat exchanger for heat consumption is set as the second target temperature, and the heat consumption unit etc. Heat consumption can be appropriately performed. The operation control means sets the target heating temperature to a temperature between the first target temperature and the second target temperature when the set time elapses after setting the target heating temperature to the second target temperature in the low temperature side setting control. Since the setting is changed, the temperature difference between the target heating temperature and the temperature of the hot water in the hot water storage tank can be reduced, and the hot water stored in the hot water storage tank can be effectively used to appropriately reduce the energy consumption in the auxiliary heating device. Hot water can be supplied to the hot water use location while planning.

The figure which shows the schematic structure of a heat supply equipment, and the flow state of the fluid in a hot water storage operation The figure which shows the schematic structure of a heat supply equipment, and the flow state of the fluid in a hot water supply operation The figure which shows the schematic structure of a heat supply equipment, and the flow state of the fluid in heating operation The figure which shows the schematic structure of a heat supply equipment, and the flow state of the fluid in a memorial operation The figure which shows the schematic structure of a heat supply equipment, and the flow state of the fluid in the case of performing hot water supply operation and heating operation simultaneously Flow chart showing operation in low temperature side setting control Flow chart showing operation in low temperature side setting control

An embodiment of a heat supply facility according to the present invention will be described based on the drawings.
[First Embodiment]
As shown in FIGS. 1 to 5, this heat supply facility includes hot water storage means A (see FIG. 1) that can store hot water heated by the exhaust heat of the heat supply device 1 in the hot water storage tank 2, and the hot water storage tank 2. The same auxiliary heating as the hot water supply means B (see FIG. 2) that can be supplied to the hot water supply usage points 4 and 10 in a state where water can be mixed with the hot water after passing through the auxiliary heating device 3 Heat consumption circulation supply means C (see FIGS. 3 and 4) that can freely supply hot water heated by the apparatus 3 to the heat exchanger 5 for heat consumption, heating operation of the auxiliary heating device 3, and hot water storage means A And an operation control means D for controlling the operation of the hot water supply means B and the heat consumption circulation supply means C. FIGS. 1 to 5 are diagrams showing a schematic configuration of the heat supply facility, but in each of FIGS. 1 to 5, portions through which hot water, a heat medium, or the like flows are indicated by thick lines.

  Since the heat supply device 1 is, for example, a fuel cell using city gas as fuel, the heat supply device is hereinafter referred to as a fuel cell 1. Incidentally, the heat supply device is not limited to the fuel cell, but can be a gas engine using city gas as fuel, and various other heat supply devices can be applied. The hot water storage means A supplies hot water from the hot water storage tank 2 to the fuel cell 1 as shown by a thick line in FIG. 1, heats the hot water with the exhaust heat of the fuel cell 1, and supplies the heated hot water to the hot water storage tank 2. The hot water heated by the exhaust heat of the fuel cell 1 is stored in the hot water storage tank 2.

  As indicated by the thick line in FIG. 2, the hot water supply means B allows hot water taken out from the hot water storage tank 2 to pass through the auxiliary heating device 3 and be heated by the auxiliary heating device 3, and has passed through the auxiliary heating device 3. Water is mixed with hot water so that the temperature of the hot water is set to the hot water supply setting temperature required at the hot water supply use points 4 and 10, and hot water at the hot water supply set temperature is supplied to the hot water supply use points 4 and 10. Yes. Here, although the hot-water supply use location is the hot-water tap 4 and the bathtub 10, other locations can also be applied.

  The heat consumption circulation supply means C circulates and supplies hot water heated by the auxiliary heating device 3 to the heat consumption heat exchanger 5 and also heat exchange for heat consumption, as shown by thick lines in FIGS. The heat medium circulated between the heat consuming heat exchanger 5 and the heat consuming units 9 and 10 is heated in the heat exchanger 5 and the heated heat medium is circulated and supplied to the heat consuming units 9 and 10 for heat consumption. The units 9 and 10 are configured to perform heat consumption. Here, although the heat exchanger 5 for heat consumption is for heating the heat medium circulated between the heat consumption parts, as the heat consumption part, it performs memorial service with the heating terminal 9 that performs heating. A bathtub 10 is provided. Therefore, as the heat exchanger 5 for heat consumption, the heat medium circulated between the first heat-consuming heat exchanger 5a for heating the heat medium circulated with the heating terminal 9 and the bathtub 10. And a second heat consuming heat exchanger 5b for heating the.

  The hot water storage tank 2 is configured as a sealed tank so that hot water is present on the upper side and hot water is stored on the lower side so that the low temperature hot water exists on the lower side and forms temperature stratification. It is configured. The hot water storage tank 2 includes a first thermistor T1, a second thermistor T2, a third thermistor T3, and a fourth thermistor T4 in order from the upper side as the thermistors for detecting the temperature of the hot water in the hot water storage tank 2. . And each detection information of 1st-4th thermistor T1-T4 is comprised so that input to the operation control means D is possible, and the operation control means D is the detection information of these 1st-4th thermistors T1-T4. Based on this, the temperature of the hot water in the hot water storage tank 2 and the amount of hot water stored at a desired temperature are grasped.

  The auxiliary heating device 3 includes a gas combustion type burner 6 and a burner heating type heat exchanger 7 that heats hot water by combustion of the burner 6. The auxiliary heating device 3 is configured to adjust the temperature of hot water heated by the auxiliary heating device 3 by adjusting the amount of fuel gas supplied to the burner 6 and the like. Then, the operation control means D controls the heating operation of the auxiliary heating device 3 so that the temperature of the hot water that has passed through the auxiliary heating device 3 becomes a desired target heating temperature.

This heat supply facility is provided with a plurality of flow path portions through which fluids such as hot water and a heat medium flow, and a flow path for circulating hot water in the hot water storage tank 2 by combining the plurality of flow path portions. A flow path for supplying hot water from the tank 2 to the hot water supply use location 4 and a flow path for circulating hot water between the auxiliary heating device 3 and the heat exchanger 5 for heat consumption are configured.
Therefore, hereinafter, each of the plurality of flow path portions will be described.

  A first flow path portion R1 through which hot water of the hot water storage tank 2 flows is connected to the lower portion of the hot water storage tank 2, and the other end portion of the first flow path portion R1 is connected to the inlet side of the fuel cell 1. ing. In the first flow path part R1, in order of the flowing direction of the hot water, a fifth thermistor T5 for detecting the temperature of the hot water supplied to the radiator 8, the radiator 8, and the temperature of the hot water that has passed through the radiator 8 are detected. A thermistor T6 and a first circulation pump P1 are provided. The first flow path portion R1 can supply hot water extracted from the lower part of the hot water storage tank 2 to the fuel cell 1.

  The outlet side of the fuel cell 1 is connected to a second flow path part R2 through which hot water that has passed through the fuel cell 1 flows, and the other end of the second flow path part R2 is connected to the upper part of the hot water storage tank 2. It is connected. The second flow path portion R2 is provided with a seventh thermistor T7 that detects the temperature of the hot water supplied to the hot water storage tank 2 in the order in which the hot water flows. The second flow path portion R2 can supply hot water heated by the exhaust heat of the fuel cell 1 to the upper portion of the hot water storage tank 2.

  In addition to the first flow path part R1, a fourth flow path part R4 to which water is supplied is connected to the lower part of the hot water storage tank 2. In the fourth flow path part R4, the first pressure reducing valve E1, the eighth thermistor T8 for detecting the temperature of the water supplied to the hot water storage tank 2, and the amount of the water flowing through are detected in the order of the water flowing direction. One water amount sensor F1 and a first check valve G1 are provided. The fourth flow path portion R4 can supply water to the lower part of the hot water storage tank 2.

  In addition to the second flow path part R2, a fifth flow path part R5 through which hot water of the hot water storage tank 2 flows is connected to the upper part of the hot water storage tank 2, and the other end of the fifth flow path part R5. Is connected to the inlet side of the auxiliary heating device 3. The fifth flow path portion R5 is supplied to the second three-way valve H2, the second water amount sensor F2 for detecting the amount of hot water supplied to the auxiliary heating device 3, and the auxiliary heating device 3 in order of the flowing direction of the hot water. A ninth thermistor T9 for detecting the temperature of the hot and cold water is provided. The fifth flow path portion R5 can extract hot water from the upper part of the hot water storage tank 2 and supply the extracted hot water to the auxiliary heating device 3.

  On the outlet side of the auxiliary heating device 3, a sixth flow path part R6 for passing hot water passing through the auxiliary heating apparatus 3 is connected, and the other end of the sixth flow path part R6 is connected to the hot water tap 4. It is connected. In the sixth flow path portion R6, a tenth thermistor T10 that detects the temperature of the hot water that has passed through the auxiliary heating device 3 in the order of the flowing direction of the hot water, and a first proportional valve J1 that can adjust the flow rate of the flowing hot water. The eleventh thermistor T11 and the second check valve G2 for detecting the temperature of the hot water supplied to the hot water supply location 4 are provided. The sixth flow path portion R6 can supply hot water that has passed through the auxiliary heating device 3 to the hot water tap 4.

  In the sixth flow path portion R6, a seventh flow path portion R7 through which the hot water that has passed through the auxiliary heating device 3 flows is connected to a portion between the tenth thermistor T10 and the first proportional valve J1. The other end of the flow path part R7 is connected to the second three-way valve H2 of the fifth flow path part R5. The seventh flow path part 7 is provided with a third three-way valve H3, a first heat consuming heat exchanger 5a, and a second circulation pump P2 in order of the hot water flow direction. The seventh flow path portion R7 supplies the hot water passing through the auxiliary heating device 3 to the first heat consuming heat exchanger 5a, and the hot water passing through the first heat consuming heat exchanger 5a is supplied to the fifth flow path portion. It is possible to return to the auxiliary heating device 3 through a part of R5.

  The third three-way valve H3 of the seventh flow path part R7 is connected to an eighth flow path part R8 through which hot water that has passed through the auxiliary heating device 3 flows, and the other end of the eighth flow path part R8. Is connected to a portion between the first heat consuming heat exchanger 5a and the second circulation pump P2 in the seventh flow path portion R7. The eighth flow path part R8 is provided with a second heat consuming heat exchanger 5b in the middle part thereof. The eighth flow path portion R8 supplies the hot water that has passed through the auxiliary heating device 3 to the second heat consumption heat exchanger 5b, and the hot water that has passed through the second heat consumption heat exchanger 5b is the seventh flow path portion. It is possible to return to the auxiliary heating device 3 through a part of R7 and a part of the fifth flow path part R5.

  In addition to the seventh flow path portion R7, a ninth flow path portion R9 through which the heat medium flows is connected to the outlet side of the first heat consuming heat exchanger 5a. Is connected to the inlet side of the heating terminal 9. In the ninth flow path portion R9, a twelfth thermistor T12 that detects the temperature of the heat medium supplied to the heating terminal 9 in the order of the flow direction of the heat medium, and a first on-off valve K1 that can freely and intermittently flow the heat medium. Is provided. The ninth flow path portion R9 can supply the heating terminal 9 with the heat medium heated by the hot water of the seventh flow path portion R7 in the first heat consuming heat exchanger 5a.

  The outlet side of the heating terminal 9 is connected to a tenth flow path part R10 through which the heat medium that has passed through the heating terminal 9 flows, and the other end of the tenth flow path part R10 is used for the first heat consumption. It is connected to the inlet side of the heat exchanger 5a. In the tenth flow path portion R10, a thirteenth thermistor T13 that detects the temperature of the heat medium that has passed through the heating terminal 9, an expansion tank 11 that is open to the atmosphere, and a third circulation pump P3 are arranged in the order in which the heat medium flows. Is provided. This 10th flow-path part R10 can supply the heat medium which passed the heating terminal 9 to the 1st heat consumption heat exchanger 5a.

  As a flow path part connecting the ninth flow path part R9 and the tenth flow path part R10, a part between the 12th thermistor T12 and the first on-off valve K1 and the 10th flow path part in the ninth flow path part R9. In R10, an eleventh flow path portion R11 that connects the connection portion of the heating terminal 9 and a portion between the thirteenth thermistor 13 is provided, and a second on-off valve K2 is provided in the middle of the eleventh flow path portion R11. It has been. Further, in addition to the eleventh flow path part R11, a part between the twelfth thermistor T12 and the connection part of the eleventh flow path part R11 in the ninth flow path part R9 and a thirteenth thermistor T13 in the tenth flow path part R10. And a twelfth flow path portion R12 for connecting a portion between the expansion tank 11 and the expansion tank 11.

  The 13th channel part R13 which flows hot water of bathtub 10 as a heat carrier is connected to the exit side of heat exchanger 5b for the 2nd heat consumption separately from 8th channel part R8, The other end portion of the thirteenth flow path portion R13 is connected to the inlet side of the bathtub 10. The thirteenth flow path portion R13 is provided with a fourth circulation pump P4 in the middle thereof. The thirteenth flow path portion 13 can supply hot water of the bathtub 10 heated by the hot water of the eighth flow path portion R8 in the second heat consuming heat exchanger 5b to the bathtub 10.

  The outlet side of the bathtub 10 is connected to a fourteenth flow path portion R14 through which hot water of the bathtub 10 as a heat medium flows, and the other end portion of the fourteenth flow path portion R14 is the second heat consuming heat. It is connected to the outlet side of the exchanger 5b. A water level sensor 12 that detects the water level of the bathtub 10, a fourteenth thermistor T14 that detects the temperature of the hot water in the bathtub 10, and a predetermined amount of water flow through the fourteenth flow path portion R14 in order of the flowing direction of the hot water. The water flow switch 13 that is turned on is provided. This 14th flow-path part R14 can supply the hot water of the bathtub 10 to the 2nd heat consumption heat exchanger 5b.

  In order to be able to supply hot water that has passed through the auxiliary heating device 3 to the bathtub 10 as well, a portion between the eleventh thermistor T11 and the second check valve G2 and a fourteenth flow passage portion R14 in the sixth flow passage portion R6. 15 includes a fifteenth flow path part R15 that connects a part between the water flow switch 13 and the connection part of the second heat consuming heat exchanger 5b. The 15th flow path part R15 is provided with the 3rd water quantity sensor F3 which detects the flow volume of the hot water supplied to the 3rd on-off valve K3 and the bathtub 10 in order of the flow direction of hot water. Incidentally, although not shown in the fifteenth flow path part R15, a check valve for preventing the back flow of hot water to the sixth flow path part R6 side or an air layer is formed to form the fifteenth flow path part R15. And a mechanism for preventing contact between the hot water and the hot water of the fourteenth flow path portion R14. This 15th flow-path part R15 can supply the hot water which passed the auxiliary | assistant heating apparatus 3 to the bathtub 10 via 14th flow-path part R14 and 13th flow-path part R13.

  In order to be able to supply the hot water tap 4 and the bathtub 10 which are hot water use locations in a state where water is mixed with the hot water that has passed through the auxiliary heating device 3, the first amount of water in the fourth flow path portion R 4 that supplies water to the hot water storage tank 2. A sixteenth flow path portion R16 is provided that connects a portion between the sensor F1 and the first check valve G1 and a portion between the first proportional valve J1 and the eleventh thermistor T11 in the sixth flow path portion R6. ing. The sixteenth flow path portion R16 is provided with a third check valve G3 and a second proportional valve J2 capable of adjusting the flow rate of the flowing water in the order of the flowing direction of the water.

Various kinds of information such as detection information of a plurality of thermistors and detection information of a plurality of water quantity sensors can be input to the operation control means D. The operation control means D is configured to control the operation of various valves such as a three-way valve, a proportional valve, and an on-off valve, and the operation of each circulation pump, based on various types of input information.
The operation control means D controls the operation of this heat supply facility by controlling the operation of various valves and each circulation pump as described above. The operation control means D then stores the hot water heated by the hot water storage means A by the exhaust heat of the fuel cell 1 in the hot water storage tank 2 and the hot water passed through the auxiliary heating device 3 by the hot water supply means B. The hot water supply operation to supply the hot water tap 4 and the bathtub 10 and the hot water passing through the auxiliary heating device 3 by the heat consumption circulation supply means C are circulated and supplied to the heat exchanger 5 for heat consumption, The heat consumption operation for circulating the heat medium between the heat exchanger 5 for heat consumption is configured to be executable. As the heat consumption operation, the operation control means D circulates and supplies hot water that has passed through the auxiliary heating device 3 in the heat consumption circulation supply means C to the first heat consumption heat exchanger 5a, and the heating terminal 9 and the first heat Heating operation for circulating the heat medium to and from the heat exchanger for consumption 5a, and hot water passing through the auxiliary heating device 3 by the heat consumption circulation supply means C are circulated and supplied to the second heat consumption heat exchanger 5b. Further, a chasing operation for circulating the heat medium between the bathtub 10 and the second heat consuming heat exchanger 5b is configured to be executable.
Hereinafter, each operation will be described.

(Hot water storage operation)
The operation control means D starts the hot water storage operation when the start condition of the hot water storage operation is satisfied, for example, when the detected temperature of the fourth thermistor T4 is lower than the desired temperature when the fuel cell 1 is operating. Then, as shown by the thick line in FIG. 1, the operation control means D operates the first circulation pump P1, and takes it out from the lower part of the hot water storage tank 2 by the first flow path part R1 and the second flow path part R2. Hot water is supplied to the fuel cell 1 and heated by the exhaust heat of the fuel cell 1, and the hot water heated by the exhaust heat of the fuel cell 1 is returned to the upper part of the hot water storage tank 2 to the hot water storage tank 2 at a desired temperature. The hot water is stored. Here, the operation control means D controls the rotational speed of the first circulation pump P1 so that the detected temperature of the seventh thermistor T7 becomes a desired temperature, and the desired temperature heated by the exhaust heat of the fuel cell 1 is desired. Hot water is stored in the hot water storage tank 2. The operation control means D stops the hot water storage operation when the hot water storage operation stop condition is satisfied, for example, the detected temperature of the fourth thermistor T4 is equal to or higher than the set temperature.

(Hot water operation)
The operation control means D starts the hot water supply operation when a hot water supply request is requested from the hot water supply use points 4 and 10 such as when the hot water tap 4 is opened or the hot water filling switch of the remote controller (not shown) is turned ON. . Then, as indicated by the thick line in FIG. 2, when the hot water supply request is requested by the opening operation of the hot water tap 4, the operation control means D uses the pressure of the clean water and uses the fifth flow path portion R 5 and the sixth flow portion 6. Hot water taken from the upper part of the hot water storage tank 2 is supplied to the hot water tap 4 through the auxiliary heating device 3 by the flow path part R6. At this time, the operation control means D corresponds to the target hot water temperature set by the auxiliary heating device 3 to the hot water supply set temperature requested by the hot water tap 4 (for example, about 40 ° C. of the hot water set temperature set by the remote controller not shown). One target temperature (for example, a temperature higher by a predetermined temperature than the hot water supply set temperature) is set. Thereby, the operation control means D performs the heating operation of the auxiliary heating device 3 when the detected temperature of the ninth thermistor T9 is lower than the first target temperature, and the temperature of the hot water passing through the auxiliary heating device 3 is the tenth. The combustion operation of the burner 6 is adjusted so that the detected temperature of the thermistor T10 becomes the first target temperature, and the heating operation of the auxiliary heating device 3 is controlled. Further, when the detected temperature of the ninth thermistor T9 is equal to or higher than the first target temperature, the operation control means D does not operate the auxiliary heating device 3 and allows hot water to pass through without being heated by the auxiliary heating device 3. ing. The operation control means D then opens the first proportional valve J1 and the second proportional valve J2 so that the detected temperature of the eleventh thermistor T11, which is the temperature of hot water supplied to the hot water tap 4, becomes the hot water supply set temperature. The amount of water mixed from the sixteenth flow path portion R16 with respect to the hot water that has passed through the auxiliary heating device 3 is adjusted. At this time, the operation control means D stops the hot water supply operation when the hot water tap 4 is closed and there is no hot water supply request.

  The operation control means D supplies hot water to the bathtub 10 when a hot water supply request is requested by turning on a hot water filling switch of the remote controller (not shown). As in the case of supply, the hot water taken out from the upper part of the hot water storage tank 2 is passed through the auxiliary heating device 3 by the fifth flow path part R5 and the sixth flow path part R6, and the detected temperature of the eleventh thermistor T11 is set to the hot water supply. By adjusting the opening degree of the first proportional valve J1 and the second proportional valve J2 so as to reach the temperature, the mixing amount of water from the sixteenth flow path portion R16 with respect to the hot water passing through the auxiliary heating device 3 is adjusted. Yes. Then, the operation control means D opens the third on-off valve K3 so that the hot water at the hot water supply set temperature passes through the fifteenth flow passage portion R15, the fourteenth flow passage portion R14, and the thirteenth flow passage portion 13, and the bathtub 10 To supply. At this time, the operation control means D grasps the amount of hot water supplied to the bathtub 10 from the detection information of the third water amount sensor F3, and when the amount of hot water supplied reaches the set supply amount, the third on-off valve K3. Is closed to stop the hot water supply operation.

(Heating operation)
The operation control means D starts the heating operation when a heating request (heat consumption request) is requested from the heating terminal 9, such as when an operation switch of a remote controller (not shown) of the heating terminal 9 is turned on. Then, as indicated by the thick line in FIG. 3, the operation control means D operates the second circulation pump P <b> 2 to supply the hot water that has passed through the auxiliary heating device 3 to the seventh flow path part R <b> 7. The three-way valve H3 is switched, and the hot water heated by the auxiliary heating device 3 by the part of the sixth channel part R6, the part of the seventh channel part R7, and the part of the fifth channel part R5 is used for the first heat consumption. It circulates and supplies to the heat exchanger 5a. Further, the operation control means D operates the third circulation pump P3, and the heating terminal 9 and the first heat consuming heat by the ninth flow path part R9, the tenth flow path part R10, and the twelfth flow path part R12. A heat medium is circulated between the exchanger 5a. At this time, the operation control means D sets the target heating temperature by the auxiliary heating device 3 to the heating heat consumption setting temperature (for example, about 60 to 80 ° C.) that is required by the heating terminal 9. 2 The target temperature (for example, the same temperature as the heat consumption set temperature for heating or a temperature higher by a predetermined temperature than that) is set. As a result, the operation control means D heats the auxiliary heating device 3 so that the detected temperature of the tenth thermistor T10, which is the temperature of the hot water that has passed through the auxiliary heating device 3, becomes the second target temperature for heating. The amount of combustion of the burner 6 is adjusted to control the heating operation of the auxiliary heating device 3. Therefore, the first heat consuming heat exchanger 5a is supplied with hot water of the second target temperature for heating heated by the auxiliary heating device 3 and also with a heat medium from the heating terminal 9. The heat medium from the heating terminal 9 is heated by the hot water heated by the auxiliary heating device 3. In this manner, the heating medium heated by the first heat consuming heat exchanger 5a is circulated and supplied to the heating terminal 9 so that the heating terminal 9 performs heating.

  Incidentally, the operation control means D opens the first on-off valve K1 within the next set period according to the heating load at the heating terminal 9 every time a set period (for example, 20 minutes) elapses. And the length of the closing time for closing the first on-off valve K1 are adjusted, and the heating medium at the heating terminal 9 is supplied according to the heating load. At this time, when there is no heating request (heat consumption request) from the heating terminal 9, such as when the operation switch of the remote controller outside the figure of the heating terminal 9 is turned off, the operation control means D stops the heating operation.

(Memorial operation)
The operation control means D starts a chasing operation when a chasing request (heat consumption request) is requested from the bathtub 10, such as when a chasing switch of a remote controller outside the bathroom is turned on. Then, as indicated by the thick line in FIG. 4, the operation control means D operates the second circulation pump P <b> 2 to supply hot water that has passed through the auxiliary heating device 3 to the eighth flow path part R <b> 8. The three-way valve H3 is switched, and the hot water heated by the auxiliary heating device 3 by the part of the sixth channel part R6, the part of the eighth channel part R8, and the part of the fifth channel part R5 is used for the third heat consumption. It circulates and supplies to the heat exchanger 5b. In addition, the operation control means D operates the fourth circulation pump P4, and heats between the bathtub 10 and the second heat consuming heat exchanger 5b by the fourteenth flow path portion R14 and the thirteenth flow path portion R13. A medium (hot water in the bathtub 10) is circulated. At this time, the operation control means D has a second heating temperature corresponding to the heat consumption setting temperature (for example, about 40 ° C.) for the heating required for the bath 10 as the target heating temperature by the auxiliary heating device 3. The target temperature is set to a target temperature (for example, a temperature that is higher by a predetermined temperature than the heat consumption setting temperature for remedy). Incidentally, the second target temperature for remembrance is set to a temperature higher than the first target temperature described above. As a result, the operation control means D heats the auxiliary heating device 3, and the detected temperature of the tenth thermistor T10, which is the temperature of the hot water that has passed through the auxiliary heating device 3, becomes the second target temperature for remembrance. Further, the amount of combustion of the burner 6 is adjusted to control the heating operation of the auxiliary heating device 3. Accordingly, the second heat consuming heat exchanger 5b is supplied with hot water at the second target temperature for heating, which is heated by the auxiliary heating device 3, and the heat medium from the bathtub 10 (hot water in the bathtub 10). ) Is supplied, the heat medium from the bathtub 10 (hot water in the bathtub 10) is heated by the hot water heated by the auxiliary heating device 3. In this manner, the heat medium (hot water in the bathtub 10) heated by the second heat consuming heat exchanger 5b is circulated and supplied to the bathtub 10 so that the hot water in the bathtub 10 is replenished. At this time, the operation control means D knows the temperature of the hot water in the bathtub 10 from the detection information of the fourteenth thermistor T14, and when the temperature of the hot water reaches the set temperature for remedy, the operation is stopped. Yes.

  In the heat supply facility according to the present invention, when performing the hot water supply operation and the heat consumption operation at the same time, the hot water stored in the hot water storage tank 2 is effectively used to improve the energy saving performance, and the hot water supply use location 4 The hot water supply to 10 and the heat consumption in the heat consumption units 9 and 10 are performed. Therefore, a case where the hot water supply operation and the heat consumption operation are performed simultaneously will be described.

(When performing hot water supply operation and heat consumption operation simultaneously)
In the present application, as a case where the hot water supply operation and the heat consumption operation which are the objects of the invention are performed simultaneously, a case where the hot water supply operation for supplying hot water to the hot water tap 4 and the heating operation are performed simultaneously will be described as an example with reference to FIG. To do.
The operation control means D assists the hot water taken out from the upper part of the hot water storage tank 2 by the fifth flow path part R5 and the sixth flow path part R6 by using the pressure of clean water as shown by the thick line in FIG. A portion of hot water that has passed through the heating device 3 and passed through the auxiliary heating device 3 is supplied to the hot water tap 4, and the second circulation pump P2 is operated to pass hot water that has passed through the auxiliary heating device 3 into the seventh flow path. The third three-way valve H3 is switched so as to be supplied to the part R7, and the remaining part of the hot water that has passed through the auxiliary heating device 3 is circulated and supplied to the first heat consuming heat exchanger 5a.

  At this time, the operation control means D causes the auxiliary heating device 3 to perform an auxiliary heating operation. However, when hot water having a hot water supply temperature or higher exists in the hot water storage tank 2, the target heating temperature by the auxiliary heating device 3 is set to the second value. It is configured to perform low temperature side setting control that sets the temperature lower than the target temperature (second target temperature for heating) and higher than the first target temperature. In other words, the operation control means D knows the temperature of the hot water in the hot water storage tank 2 from the detection information of the first to fourth thermistors T1 to T4. Then, for example, if the detected temperature of the first thermistor T1 is equal to or higher than the hot water supply set temperature, the operation control means D determines that hot water equal to or higher than the hot water supply set temperature exists in the hot water storage tank 2, and conversely, the first thermistor If the detected temperature of T1 is lower than the hot water supply set temperature, it is determined that there is no hot water above the hot water supply set temperature in the hot water storage tank 2. When the operation control means D determines that hot water of a hot water supply temperature or higher exists in the hot water storage tank 2, the target heating temperature by the auxiliary heating device 3 is lower than the second target temperature (second target temperature for heating) and When the hot water supply operation and the heating operation are performed simultaneously in the form of performing the low temperature side setting control set to the first target temperature or higher, and it is determined that there is no hot water above the hot water supply set temperature in the hot water storage tank 2, the target heating by the auxiliary heating device 3 The temperature is set to the second target temperature (second target temperature for heating), and the hot water supply operation and the heating operation are performed simultaneously.

Hereinafter, the low temperature side setting control by the operation control means D will be described based on the flowcharts of FIGS. 6 and 7.
When the hot water supply operation for supplying hot water to the hot water tap 4 and the heating operation are performed simultaneously, the hot water supply operation is started during the heating operation and the hot water supply operation and the heating operation are performed simultaneously. There is a case where the heating operation is started during execution and the hot water supply operation and the heating operation are performed simultaneously.

  As shown in FIG. 6, when the hot water supply operation is started during the heating operation and the hot water supply operation and the heating operation are performed simultaneously (steps # 1 and # 2), the operation control means D performs the low temperature side setting control. During the hot water supply operation, the target heating temperature by the auxiliary heating device 3 is set to the first target temperature (steps # 3 and # 4). And in this low temperature side setting control, the operation control means D is the setting continuation time (for example, 5 to 5) when the target heating temperature by the auxiliary heating device 3 is set to the first target temperature lower than the second target temperature. 10 minutes), the target heating temperature by the auxiliary heating device 3 is changed and set to the second target temperature (second target temperature for heating) (steps # 5 and # 6).

  In this way, the operation control means D first sets the target heating temperature by the auxiliary heating device 3 to the first target temperature, so that hot water above the hot water supply set temperature of the hot water storage tank 2 is supplied by the auxiliary heating device 3. Even if it heats with auxiliary heating device 3 without heating, it can supply to hot-water tap 4 without heating to high temperature like the 2nd target temperature (2nd target temperature for heating). . Therefore, it is possible to prevent the auxiliary heating device 3 from heating up to a high temperature such as the second target temperature (second target temperature for heating), and effectively utilizing the hot water in the hot water storage tank 2. The hot water tap 4 can be supplied with hot water at a set temperature for hot water supply. Thus, even if the low temperature side setting control for setting the target heating temperature by the auxiliary heating device 3 to the first target temperature is performed, the heating terminal uses a heating terminal having a small heat response and a large heat capacity as a heat receiver, Even if the first target temperature for hot water supply operation, which is a relatively short time (for example, 2 to 5 minutes) in the heating operation, is used as the target heating temperature by the auxiliary heating device 3, the effect on the heating operation is small. Become. However, if the target heating temperature by the auxiliary heating device 3 is set to the first target temperature, the temperature of the hot water supplied to the first heat consuming heat exchanger 5a is lowered, so the target heating by the auxiliary heating device 3 is reduced. If the state in which the temperature is set to the first target temperature is continued for a long time, the temperature of the heat medium supplied to the heating terminal 9 may decrease, and heating at the heating terminal 9 may not be performed appropriately. Therefore, the operation control means D performs auxiliary heating when the state in which the target heating temperature by the auxiliary heating device 3 is set to the first target temperature in the low temperature side setting control is continued for a set duration (for example, 5 to 10 minutes). The target heating temperature by the apparatus 3 is changed and set to the second target temperature (second target temperature for heating), and the temperature of the hot water supplied to the first heat consuming heat exchanger 5a is changed to the second target temperature (for heating). 2nd target temperature), the temperature of the heat medium supplied to the heating terminal 9 is prevented from being lowered, and the heating at the heating terminal 9 can be appropriately performed.

  As shown in FIG. 7, when the heating operation is started during the hot water supply operation and the hot water supply operation and the heating operation are performed simultaneously (steps # 11 and 12), the operation control means D performs the low temperature side setting control. Then, after setting the target heating temperature by the auxiliary heating device 3 to the second target temperature (second target temperature for heating), when a set time (for example, 5 to 10 minutes) elapses, the target heating temperature by the auxiliary heating device 3 is set. The first target temperature is changed and set (steps # 13 to 15).

  In this way, the operation control means D first sets the target heating temperature by the auxiliary heating device 3 to the second target temperature (the second target temperature for heating), and the heat medium supplied to the heating terminal 9 A temperature drop is prevented, and heating at the heating terminal 9 can be appropriately performed. Then, the operation control means D sets the target heating temperature by the auxiliary heating device 3 to the first target temperature after the set time has elapsed, and supplies hot water above the hot water supply set temperature of the hot water storage tank 2 to the auxiliary heating device 3. It can be supplied to the hot water tap 4 without being heated by the auxiliary heating device 3 without being heated to a high temperature such as the second target temperature. Therefore, it is possible to prevent the auxiliary heating device 3 from heating up to a high temperature such as the second target temperature (second target temperature for heating), and effectively utilizing the hot water in the hot water storage tank 2. The hot water tap 4 can be supplied with hot water at a set temperature for hot water supply.

  Although illustration is omitted, in the flowchart of FIG. 7, after setting the target heating temperature by the auxiliary heating device 3 to the first target temperature, the operation control means D is controlled by the auxiliary heating device 3 as in the flowchart of FIG. 6. When the state in which the target heating temperature is set to the first target temperature is continued for a set duration (for example, 5 to 10 minutes), the target heating temperature by the auxiliary heating device 3 is changed to the second target temperature (the second target temperature for heating). ) Can be changed. Further, after setting the target heating temperature by the auxiliary heating device 3 to the first target temperature, the operation control means D sets the target heating temperature by the auxiliary heating device 3 to the first during the hot water supply operation as in the flowchart of FIG. When the target temperature is set to 1 and the hot water supply operation is stopped, the target heating temperature by the auxiliary heating device 3 can be changed and set to the second target temperature (second target temperature for heating).

As described above, the case where the hot water supply operation and the heat consumption operation are performed at the same time has been illustrated based on FIG. 5, for example, the hot water supply operation for supplying hot water to the hot water tap 4 and the heating operation are performed simultaneously. Even in the case where the hot water supply operation for supplying hot water to the stopper 4 and the chasing operation are performed at the same time, the operation control means D is similar to the above case when the hot water of the hot water storage tank 2 is higher than the hot water supply set temperature. Further, it is possible to perform low temperature side setting control in which the target heating temperature by the auxiliary heating device 3 is set to be lower than the second target temperature (second target temperature for tracking) and higher than the first target temperature.
Further, the hot water supply operation is not limited to the hot water supply operation for supplying hot water to the hot water tap 4, but may be a hot water supply operation for supplying hot water to the bathtub 10. In this case, since the supply amount of hot water requested in the bathtub 10 can be obtained based on the detection information of the water level sensor 12, the operation control means D detects the detection information of the first to fourth thermistors T1 to T4. The hot water storage amount above the hot water supply set temperature of the hot water storage tank 2 is obtained based on the above, and can the part or all of the hot water supply amount required in the bathtub 10 be covered by the obtained hot water storage amount? If it is possible to cover the hot water storage tank 2, it is determined that there is hot water above the hot water supply set temperature, and the low temperature side setting control is performed. It can be determined that it does not exist, and the target temperature by the auxiliary heating device 3 can be set to the second target temperature.

[Second Embodiment]
This 2nd Embodiment is another embodiment about the control content of the low temperature side setting control by the operation control means D in the said 1st Embodiment. Since the other configuration is the same as that of the first embodiment, only the control content of the low temperature side setting control by the operation control means D will be described, and the description of the other configuration will be omitted.

  In the first embodiment, the operation control means D sets the target heating temperature by the auxiliary heating device 3 as the temperature lower than the second target temperature and equal to or higher than the first target temperature in the low temperature side setting control. Although the target temperature is set, in this second embodiment, the operation control means D performs the low temperature side setting control between the first target temperature and the second target temperature for the target heating temperature by the auxiliary heating device 3. The temperature is set. For example, a temperature that is between the first target temperature and the second target temperature and is higher than the first target temperature by a set temperature is set as the third target temperature. In the first embodiment, “set to the first target temperature” in step # 4 in FIG. 6 is changed to “set to the third target temperature”, and “first target temperature” in step # 15 in FIG. By changing the setting to “set to the third target temperature”, the operation control means D causes the target heating temperature by the auxiliary heating device 3 to be lower than the second target temperature and lower in the low temperature side setting control. The temperature is set to the third target temperature as the temperature equal to or higher than the first target temperature.

  The present invention provides hot water storage means for freely storing hot water heated by exhaust heat of a heat supply device in a hot water storage tank, hot water in the hot water storage tank is passed through an auxiliary heating device, and water is supplied to the hot water after the passage. Hot water supply means that can be supplied to a hot water use location in a mixable state, heat consumption circulation supply means that can freely supply hot water heated by the same auxiliary heating device to a heat exchanger for heat consumption, and the auxiliary heating device Hot water stored in the hot water storage tank when performing the hot water supply operation and the heat consumption operation at the same time, and the operation control means for controlling the operation of the hot water supply means and the heat consumption circulation supply means. It can be applied to various types of heat supply equipment that can effectively use heat to improve the energy saving and supply heat to the hot water use location and heat consumption at the heat consumption section.

DESCRIPTION OF SYMBOLS 1 Heat supply device 2 Hot water storage tank 3 Auxiliary heating device 4 Hot water use location (hot water tap)
5 Heat exchanger for heat consumption 10 Use of hot water supply (tub)
A Hot water storage means B Hot water supply means C Heat consumption circulation supply means D Operation control means

Claims (6)

Hot water storage means that can store hot water heated by the exhaust heat of the heat supply device freely in the hot water storage tank, and hot water from the hot water storage tank can be passed through the auxiliary heating device, and water can be mixed with the hot water after passing through the auxiliary heating device Hot water supply means that can be freely supplied to the hot water use location, heat consumption circulation supply means that can circulate and supply hot water heated by the same auxiliary heating device to the heat exchanger for heat consumption, and heating operation of the auxiliary heating device, And heat supply equipment provided with operation control means for controlling the operation of the hot water supply means and the heat consumption circulation supply means,
The operation control means sets a target heating temperature by the auxiliary heating device to a first target temperature corresponding to a hot water supply set temperature, and supplies hot water that has passed through the auxiliary heating device to the hot water supply use location by the hot water supply means. Hot water supply operation, and the target heating temperature is set to a second target temperature corresponding to a heat consumption setting temperature higher than the first target temperature, and the hot water passed through the auxiliary heating device by the heat consumption circulation supply means When the hot water supply operation and the heat consumption operation are performed at the same time, hot water above the hot water supply set temperature is received in the hot water storage tank. A heat supply facility configured to perform low temperature side setting control for setting the target heating temperature to be lower than the second target temperature and higher than the first target temperature, if present.   When the operation control means starts the hot water supply operation during execution of the heat consumption operation and simultaneously performs the hot water supply operation and the heat consumption operation, in the low temperature side setting control, during the execution of the hot water supply operation, The heat supply equipment according to claim 1, wherein the heat supply equipment is configured to set the target heating temperature to the first target temperature.   When the operation control means starts the hot water supply operation during execution of the heat consumption operation and simultaneously performs the hot water supply operation and the heat consumption operation, in the low temperature side setting control, during the execution of the hot water supply operation, The heat supply facility according to claim 1, wherein the target heating temperature is configured to be set to a temperature between the first target temperature and the second target temperature.   The operation control means sets the target heating temperature in the low temperature side setting control when the hot water supply operation is started and the hot water supply operation and the heat consumption operation are simultaneously performed during execution of the heat consumption operation. 2. The system is configured to change and set the target heating temperature to the second target temperature when a state set at a temperature lower than the second target temperature and higher than the first target temperature is continued for a set duration. The heat supply equipment according to 2 or 3.   The operation control means sets the target heating temperature in the low temperature side setting control when starting the heat consumption operation during execution of the hot water supply operation and simultaneously performing the hot water supply operation and the heat consumption operation. The heat supply equipment according to any one of claims 1 to 4, wherein the heat supply equipment is configured to change and set the target heating temperature to the first target temperature when a set time elapses after the two target temperatures are set.   The operation control means sets the target heating temperature in the low temperature side setting control when starting the heat consumption operation during execution of the hot water supply operation and simultaneously performing the hot water supply operation and the heat consumption operation. 5. The apparatus according to claim 1, wherein the target heating temperature is changed and set to a temperature between the first target temperature and the second target temperature when a set time elapses after setting the target temperature. The heat supply facility according to any one of the above.

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