JP6245822B2 - Heat supply equipment - Google Patents

Description

  The present invention relates to a combined heat and power device that generates heat and electric power, a hot water storage tank that stores hot heat generated by the combined heat and power supply device as hot water, and a supply of hot water that uses hot water stored in the hot water storage tank as a heat source. The present invention relates to a heat supply facility provided with a high-temperature water use terminal that receives and operates.

  In the heat supply equipment as described above, heat generated from the combined heat and power supply device is stored as hot water in a hot water storage tank, and the stored hot water is used as a heat source for operating the hot water utilization terminal. As the hot water use terminal, for example, a low temperature water use terminal such as a floor heating device operated using low temperature water (for example, 40 ° C. or 60 ° C.) as a heat source, and hot water (for example, 75 ° C., for example) And a high-temperature water use terminal such as a bathroom dryer operated using a heat source (for example, see Patent Document 1).

  For example, in the case of a bathroom drying device, the hot water use terminal as an example of the hot water use terminal supplies the supplied hot water to the heat exchange unit, and in the heat exchange unit, the air sucked from the bathroom with the hot water A part is heated, the heated air is supplied into the bathroom, and a part of the air sucked from the bathroom is exhausted to the outside so that the bathroom is dried. In such a high-temperature water use terminal, in order to perform the operation, a high temperature (for example, 75 ° C. or 80 ° C.) is required as a hot water temperature serving as a heat source. Therefore, the facility described in Patent Document 1 includes an auxiliary heating unit so that even when the required temperature is higher than the hot water temperature of the hot water storage tank, the hot water having the required temperature can be supplied to the high-temperature water use terminal. ing. The hot water supply unit heats the hot water taken out from the hot water storage tank by the auxiliary heating unit, so that the hot water taken out exceeds the required temperature. The hot water supply unit generates hot water having the required temperature using hot water having a temperature equal to or higher than the required temperature as a heat source, and supplies the hot water having the required temperature to the high-temperature water using terminal.

JP 2011-47591 A

  In the facility described in Patent Document 1, when the required temperature required at the high-temperature water use terminal is higher than the hot water temperature of the hot water storage tank (the hot water temperature of the hot water storage tank is lower than the required temperature), the temperature is high. When the water utilization terminal is operated, heating is always performed by the auxiliary heating unit, and the amount of energy consumption increases accordingly. Therefore, improvement is required from the viewpoint of energy saving.

  In addition, when operating the high-temperature water terminal, the heating by the auxiliary heating unit is always performed. As a heat source for operating the high-temperature water terminal, the heat acquired by the heating of the auxiliary heating unit is mainly used. End up. Therefore, the hot water stored in the hot water storage tank has not been effectively utilized as a heat source for operating the high temperature water terminal.

  The present invention has been made paying attention to such points, and its purpose is to effectively use hot water stored in a hot water storage tank as a heat source for operating a hot water utilization terminal while saving energy. It is in the point of providing the heat supply equipment which can be done.

In order to achieve this object, the characteristic configuration of the heat supply facility according to the present invention includes a cogeneration device that generates heat and electric power, a hot water storage tank that stores hot heat generated by the cogeneration device as hot water, and A hot water use terminal that operates by receiving supply of hot water stored in a hot water storage tank as a heat source, and a hot water supply that supplies hot water using hot water stored in the hot water storage tank as a heat source to the hot water use terminal An auxiliary heating unit capable of heating hot water, and an operation control unit for controlling the operation of the hot water supply unit and the auxiliary heating unit to perform hot water supply operation for supplying hot water to the hot water use terminal,
The hot water use terminal is a bathroom dryer;
The operation control unit performs a temperature determination process to determine whether the hot water temperature of the hot water storage tank is equal to or higher than a mode determination set temperature,
When the hot water temperature of the hot water storage tank is lower than the set temperature for mode discrimination, heating is performed by the auxiliary heating unit, and heated hot water using the hot water heated by the auxiliary heating unit as a heat source is heated by the hot water supply unit. Perform hot water supply operation in the heating supply mode to supply to the hot water use terminal,
When the hot water temperature of the hot water storage tank is equal to or higher than the set temperature for mode determination, heating by the auxiliary heating unit is not performed, and the hot water supply unit supplies unheated hot water using the hot water of the hot water storage tank as a heat source as it is as the hot water. It is configured to perform hot water supply operation in the non-heating supply mode that supplies to the user terminal,
About the set temperature for mode discrimination, it is configured to be freely changeable within a temperature range lower than the required temperature required for the hot water use terminal ,
The operation control unit is provided with an artificially operated mode command unit that commands the non-heating supply mode, and the operation control unit performs the temperature determination process when receiving a command from the mode command unit. Perform the hot water supply operation in either the heating supply mode or the non-heating supply mode based on the determination result of the temperature determination processing, and if the command from the mode command unit is not received, the heating The hot water supply operation is performed in the supply mode .

According to this feature configuration, the hot water supply operation is performed alternatively between the heating supply mode and the non-heating supply mode. Here, in the heating supply mode, the hot water obtained from the hot water storage tank is heated by the auxiliary heating unit and supplied to the hot water usage terminal, and in the non-heating supply mode, the hot water obtained from the hot water storage tank is supplied to the hot water usage terminal as it is. Use.
The set temperature for mode discrimination unique to the present application is a switching threshold temperature for switching both modes in the heat supply facility. The mode discrimination set temperature can be changed and set according to the convenience of the user or the like as long as it is within a temperature range lower than the required temperature required for the hot water use terminal.

For example, when the hot water use terminal is a high temperature water use terminal such as a bathroom drying device, usually, a required temperature at which a sufficiently high temperature and quick heat use can be achieved by using the high temperature water is set. That is, when a bathroom dryer is taken as an example of the high-temperature water use terminal, the required temperature is set in consideration of completing the drying as quickly as possible. For this setting, there may be a case where a conventionally required temperature is not required and a state lower than the required temperature can be allowed due to factors such as user convenience. For example, when drying is desired for a relatively long time at night. Therefore, in order to cope with the latter case, the switching threshold temperature of both modes can be changed and set to a temperature state desired by the user of the heat supply facility. And by setting the mode discrimination set temperature within a temperature range lower than the required temperature of the hot water use terminal, even if the hot water temperature stored in the hot water storage tank is lower than the required temperature of the hot water use terminal The hot water use terminal can be operated using the hot water in the hot water storage tank as it is without operating the auxiliary heating unit. Therefore, while it is possible to change and set the mode discrimination set temperature for the convenience of the user, etc., it is possible to operate the hot water usage terminal using the hot water in the hot water storage tank as it is without using the auxiliary heating unit as much as possible. The hot water stored in the hot water storage tank can be effectively used as a heat source for operating the hot water use terminal while achieving the conversion.
Moreover, according to this feature configuration, since the mode command unit is provided, when the user wants to perform the hot water supply operation in the non-heating supply mode, the operation control unit performs the hot water supply operation in the non-heating supply mode. It can be performed. And since the operation control unit performs the temperature discrimination process only when receiving a command from the mode command unit, even when the user wants to perform the hot water supply operation in the non-heating supply mode, The hot water supply operation in the non-heating supply mode can be performed while confirming whether the hot water in the hot water storage tank can be used as it is as a heat source for operating the terminal.

  A further characteristic configuration of the heat supply facility according to the present invention is that the set temperature for mode determination can be changed and set according to the type of the combined heat and power supply device.

  Since the temperature of hot water that can be collected differs depending on the type of the combined heat and power supply device, if the set temperature for mode discrimination is higher than the temperature of the hot water that can be collected, the non-heating supply mode is not performed and the hot water in the hot water storage tank is used as it is. Cannot be used. Therefore, in this feature configuration, even if the hot water temperature stored in the hot water storage tank changes depending on the type of the combined heat and power supply device, the recovery can be performed by changing the setting temperature for mode discrimination according to the changed hot water temperature. The hot water that is used is used as much as possible, and the auxiliary heating unit is operated as little as possible.

  A further characteristic configuration of the heat supply facility according to the present invention is provided with an artificially operated input unit capable of inputting type information about the type of the combined heat and power supply device, and the operation control unit includes the input unit. The mode determination set temperature is changed and set according to the type information of the combined heat and power supply device input to the above.

  According to this feature configuration, for example, when installing a new facility or replacing a combined heat and power supply device, the operator only has to input the type information of the combined heat and power supply device using the input unit, and the mode determination set temperature can be set. Can be changed and set. Therefore, it is possible to simplify the configuration for changing and setting the mode determination set temperature.

  A further characteristic configuration of the heat supply facility according to the present invention is that the set temperature for mode determination can be changed and set according to a required temperature required for the hot water utilization terminal equipped.

  According to this feature configuration, for example, even if the required temperature is changed depending on the usage environment of the hot water usage terminal, the mode discrimination setting temperature can be changed and set according to the changed required temperature. While responding flexibly to changes in the usage environment of the terminal, the hot water use terminal can be operated using hot water in the hot water storage tank as it is, without making the auxiliary heating unit work as much as possible.

  A further characteristic configuration of the heat supply facility according to the present invention is provided with an artificially-operated input unit capable of freely inputting temperature information about a required temperature required for the hot water utilization terminal equipped, and the operation control unit includes: The mode determining set temperature is changed and set according to temperature information about the required temperature input to the input unit.

  According to this feature configuration, for example, when newly installing a facility or replacing a hot water use terminal, the operator only has to input the temperature information of the hot water use terminal through the input unit, and the mode discrimination set temperature is set. Can be changed and set. Therefore, it is possible to simplify the configuration for changing and setting the mode determination set temperature.

  According to a further characteristic configuration of the heat supply facility according to the present invention, the set temperature for mode discrimination is changed and set according to a required temperature required for the hot water use terminal to be equipped and a type of the cogeneration device to be equipped. It is in the point that it is configured freely.

  In the case of this feature configuration, a mode switching threshold temperature is set between the heating supply mode and the non-heating supply mode in consideration of the characteristics of both the hot water utilization terminal and the combined heat and power supply device provided in the heat supply facility. The set temperature for discrimination can be changed and set.

  A further characteristic configuration of the heat supply facility according to the present invention is that, when the hot water temperature of the hot water storage tank is equal to or higher than the set temperature for mode determination, the hot water supply operation in the non-heating supply mode can be executed. A mode display unit for displaying is provided.

  According to this characteristic configuration, it is possible to recognize that the user can execute the hot water supply operation in the non-heating supply mode only by visually recognizing the display on the mode display unit. Therefore, the user can recognize that the hot water supply operation can be performed while saving energy by effectively using the hot water in the hot water storage tank under the situation where the display on the mode display section is performed. The energy saving can be achieved while aiming at the convenience.

Schematic showing the overall configuration of the heat supply equipment Schematic configuration diagram of bathroom dryer Schematic diagram showing the main parts of the heat supply equipment in the heating supply mode and the temperature limit mode Schematic diagram showing the main parts of the heat supply equipment in the non-heating supply mode and the temperature non-limitation mode Flow chart showing mode selection in unit side control unit Flow chart showing mode selection in terminal side control unit A table showing the relationship between the type of combined heat and power supply and the set temperature for mode discrimination

An embodiment of a heat supply facility according to the present invention will be described with reference to the drawings.
[First Embodiment]
As shown in FIG. 1, the heat supply facility 100 collects heat generated in the combined heat and power supply device 1 that generates electric power and heat, the hot water storage tank 2, and the combined heat and power supply device 1, and supplies it as hot water to the hot water storage tank 2. An exhaust heat recovery unit 3 that stores hot water, a hot water supply unit 4 that supplies hot water generated using hot water stored in the hot water storage tank 2 as a heat source to the low-temperature water use terminal 14 and the high-temperature water use terminal 15, and the hot water supply unit A low-temperature water use terminal 14 and a high-temperature water use terminal 15 that are operated using the hot water supplied at 4 are provided. This heat supply facility 100 allows fluid to flow through the first unit Y1 provided with the combined heat and power supply device 1, the second unit Y2 provided with the hot water storage tank 2, the bathtub 13, the low-temperature water use terminal 14, and the high-temperature water use terminal 15. It is comprised by connecting by the flow path etc. to be made.

  Examples of the cogeneration device 1 include an engine-driven power generation device that combines a power generator and a gas engine that drives the power generator, a power generation device that includes a polymer electrolyte fuel cell, and a solid oxide fuel cell. Various cogeneration devices such as a power generation device provided can be applied. The heat supply facility 100 includes an inverter 6 that links the power generated by the combined heat and power supply device 1 to the commercial power system 8. The heat and power supply device 1 and the commercial power system 8 are connected to the power supply line 7. Are electrically connected.

  The exhaust heat recovery unit 3 includes a first circulation path J1 that circulates an exhaust heat recovery fluid between the combined heat and power supply device 1 and the exhaust heat heat exchanger 9. In the first circulation path J1, a first circulation pump P1 is provided in a return-side flow path portion from the exhaust heat exchanger 9 to the combined heat and power supply device 1. The exhaust heat recovery unit 3 operates the first circulation pump P1 and causes the exhaust heat recovery fluid to flow through the first circulation path J1, thereby recovering the heat generated in the combined heat and power supply device 1. Is circulated and supplied to the exhaust heat exchanger 9. Thereby, the exhaust heat heat exchanger 9 is configured to be able to heat the hot and cold water supplied in the second circulation path J2 by the exhaust heat recovery fluid that has recovered the heat generated in the combined heat and power supply device 1.

  The exhaust heat recovery unit 3 supplies water extracted from the lower part of the hot water storage tank 2 to the exhaust heat exchanger 9 in addition to the first circulation path J1, and the hot water heated by the exhaust heat exchanger 9 is supplied to the exhaust heat recovery unit 3. A second circulation path J <b> 2 that returns to the upper part of the hot water storage tank 2 is provided. The second circulation path J2 is a second flow path section through which water (hot water) flows in the order of the first flow path section R1 for taking out water from the lower part of the hot water storage tank 2, the exhaust heat exchanger 9 and the auxiliary heating section 10. R2 and a third flow path part R3 for returning the water (hot water) passed through the second flow path part R2 to the upper part of the hot water storage tank 2 are provided. The auxiliary heating unit 10 includes, for example, a combustion device such as a burner, and a heat exchange unit that exchanges heat between the heat obtained by the combustion device and the supplied hot water, and the heat obtained by the combustion device. It is comprised so that warm water may be heated.

  A fourth flow path portion R4 for supplying water to the hot water storage tank 2 is connected to a middle portion of the first flow path portion R1, and a first check valve G1 is provided in the middle portion of the fourth flow path portion R4. It has been. Thereby, the hot water storage tank 2 is supplied with water by the fourth flow path part R4 and the first flow path part R1. The second flow path portion R2 is provided with a second circulation pump P2, an exhaust heat exchanger 9, an auxiliary heating unit 10, and a first on-off valve K1 in order from the upstream side in the flow direction of water (warm water). Yes. A second on-off valve K2 is provided in the middle of the third flow path part R3.

  In this heat supply facility 100, in cooperation with the second circulation path J2, the third circulation path J3 that takes out hot water stored in the hot water storage tank 2 and circulates and supplies it to the first heat radiating section 11 and the second heat radiating section 12 is provided. It has. The third circulation path J3 includes a fifth flow path portion R5 including the first heat radiating portion 11 and a sixth flow path portion R6 including the second heat radiating portion 12. The fifth flow path part R5 is branched from the connection point between the second flow path part R2 and the third flow path part R3, and joins the connection point between the first flow path part R1 and the second flow path part R2. It is connected. A first heat radiating part 11 and a third on-off valve K3 are provided in the middle of the fifth flow path part R5 in order from the upstream side in the direction of hot water flow. The sixth flow path part R6 is branched and connected from the upstream part in the flow direction of the hot water with respect to the first heat radiating portion 11 in the fifth flow path part R5, and from the third on-off valve K3 in the fifth flow path part R5. Is also joined and connected to the downstream portion of the hot water flow direction. A second heat radiating portion 12 and a fourth on-off valve K4 are provided in the middle of the sixth flow path portion R6 in order from the upstream side in the hot water flow direction.

  In this heat supply facility 100, not only hot water stored in the hot water storage tank 2 is supplied to the first heat radiating unit 11 and the second heat radiating unit 12, but hot water stored in the hot water storage tank 2 can be used to supply hot water. It is configured. In the third flow path part R3 connected to the upper part of the hot water storage tank 2, a seventh flow path part R7 is branched and connected to a part between the hot water storage tank 2 and the second on-off valve K2, and the seventh flow path part. A hot water tap 16 is provided at the downstream end of the hot water flow direction in R7. In the middle of the seventh flow path part R7, an eighth flow path part R8 branched and connected from the upstream part in the direction of water flow with respect to the first check valve G1 in the fourth flow path part R4 is joined and connected. The 1st three-way valve S1 is provided in the joint connection location. A second check valve G2 is provided in the middle of the eighth flow path portion R8. Thereby, the hot water taken out from the upper part of the hot water storage tank 2 is mixed with the water supplied through the fourth flow path part R4 and the eighth flow path part R8 to obtain the required hot water supply temperature. Hot water is supplied to the hot water tap 16 through the seven flow path portions R7.

  The heat supply facility 100 is configured not only to supply hot water to the hot water tap 16 but also to perform hot water filling of the bathtub 13 using hot water stored in the hot water storage tank 2. In the seventh flow path portion R7, a ninth flow path portion R9 is branched from the portion between the first three-way valve S1 and the hot water tap 16, and the ninth flow path portion R9 is connected to the bathtub 13 and the first heat radiation. The 4th circulation path J4 which circulates the hot water of the bathtub 13 between the part 11 is joined and connected. A fifth on-off valve K5 is provided in the middle of the ninth flow path portion R9. Moreover, the 3rd circulation pump P3 is provided in the side which supplies the hot water from the bathtub 13 to the 1st thermal radiation part 11 in the 4th circulation path J4. Thereby, hot water is supplied to the ninth flow path part R9 from the middle part of the seventh flow path part R7 to which the hot water tap 16 is connected, and is supplied to the fourth circulation path J4 through the ninth flow path part R9. The bath 13 is filled with water. In addition, by operating the third circulation pump P3 to circulate hot water in the bathtub 13 through the fourth circulation path J4, the fourth heat is supplied by the hot water supplied in the fifth flow path part R5 in the first heat radiating part 11. The hot water in the bathtub 13 supplied by the circulation path J4 is heated, and the heated hot water is circulated and supplied to the bathtub 13 so that the hot water in the bathtub 13 is tracked.

  In this heat supply facility 100, the fifth circulation path J5 for circulating hot water between the second heat radiating unit 12 and the low temperature water use terminal 14 and the hot water between the second heat radiating unit 12 and the high temperature water use terminal 15 are used. Is provided with a sixth circulation path J6. Since the fifth circulation path J5 and the sixth circulation path J6 circulate and supply hot water to the common second heat radiating section 12, the forward common flow path portion 17 and the return common flow path portion 18 are connected to each other. I have. The forward side common flow path part 17 is branched and connected to a low temperature side forward flow path part 19 connected to the low temperature water use terminal 14 and a high temperature side forward flow path part 20 connected to the high temperature water use terminal 15. . A low temperature side return flow path portion 21 connected to the low temperature water use terminal 14 and a high temperature side return flow path portion 22 connected to the high temperature water use terminal 15 are joined and connected to the return side common flow path portion 18. ing. The return side common flow path portion 18 is provided with an expansion tank 23 and a fourth circulation pump P4 in order from the upstream side in the direction of flow of the hot water. Further, a sixth on-off valve K6 is provided in the middle of the low temperature side forward flow path part 19, and a seventh open / close valve K7 is provided in the middle of the high temperature side forward flow path part 20. Although illustration is omitted, the branch from the forward side common flow path part 17 to the low temperature side forward flow path part 19 and the high temperature side forward flow path part 20, the sixth on-off valve K 6, and the seventh on-off valve K 7 These structures can be provided by providing the hot water header with an intermittent function. Moreover, about the confluence | merging of the low temperature side return flow path part 21 and the high temperature side return flow path part 22 with respect to the return side common flow path part 18, by providing a hot water header, those structures can be provided.

  The low-temperature water use terminal 14 is supplied with low-temperature water (for example, 40 ° C. or 60 ° C.) and is operated using the low-temperature water. For example, a floor heating device or the like is used. Further, the high-temperature water use terminal 15 is operated using the high-temperature water supplied with high-temperature water (for example, 75 ° C. or 80 ° C.) that is higher in temperature than the low-temperature water use terminal 14. A device or the like is used.

  In this embodiment, since the bathroom drying apparatus 200 is used as the high-temperature water use terminal 15, the bathroom drying apparatus 200 will be described with reference to FIG. The bathroom drying apparatus 200 includes a terminal body 201 on a ceiling 203 of a bathroom 202. The terminal body 201 receives warm water supplied from the outside and supplies it to the heat exchanging unit 204, and a circulation path for supplying air sucked from the bathroom 202 to the heat exchanging unit 204 and returning it into the bathroom 202 206, a suction fan 207 that circulates air in the bathroom 202 through the circulation path 206, an exhaust path 208 that exhausts the air sucked from the bathroom 202 to the outside, and air that is sucked from the bathroom 202 through the exhaust path 208 And an exhaust fan 209 for exhausting the air.

  The hot water receiving unit 205 includes a single hot water supply pipe 210 connected to the inlet side of the heat exchange unit 204, and this hot water supply pipe 210 is the high temperature side forward flow path portion 20 in FIG. . The hot water receiving unit 205 is configured to receive the hot water supplied from the hot water supply pipe 210 regardless of the hot water temperature and supply the hot water to the heat exchanging unit 204. A thermal valve 211 is provided in the middle of the hot water supply pipe 210. In order to discharge the hot water supplied to the heat exchanging section 204 to the outside, a single hot water discharge pipe 212 is connected to the outlet side of the heat exchanging section 204, and this hot water discharge pipe 212 is connected to the high temperature in FIG. A side return flow path portion 22 is formed. In this way, the bathroom drying apparatus 200 receives the hot water from the second heat radiating unit 12 through the hot water supply pipe 210 and returns the hot water to the second heat radiating unit 12 through the hot water discharge pipe 212.

  As shown in FIG. 1, the heat supply facility 100 includes a unit-side control unit 5 (corresponding to an operation control unit) that controls the operation of the first unit Y1 and the second unit Y2, and the first unit Y1 and the second unit Y2. A unit-side remote controller (not shown) provided with an operation command unit for performing an operation command for the two units Y2 is provided to be communicable, and the unit-side control unit 5 is based on various information from the unit-side remote controller. The operation of the first unit Y1 and the second unit Y2 is controlled. In this heat supply equipment 100, since the high temperature water use terminal 15 and the low temperature water use terminal 14 are connected, the unit-side control unit 5 determines the operation request from these hot water use terminals, the required temperature in the operation, and the like. Based on the information, the operation of the first unit Y1 and the second unit Y2 is controlled. Therefore, the unit-side control unit 5 is configured to be communicable with the terminal-side control unit 213 and the terminal-side remote control 214 provided in those hot water utilization terminals in order to acquire information such as an operation request and a required temperature. In FIG. 1, only the terminal-side control unit 213 and the terminal-side remote controller 214 provided in the high-temperature water use terminal 15 are illustrated, and the terminal-side control unit and the terminal-side remote control provided in the low-temperature water use terminal 14 are not shown. ing. Moreover, although illustration is abbreviate | omitted, in order to acquire information, such as the request | requirement temperature in the operation request | requirement in the operation of the hot water filling to the bathtub 13 or the hot water pursuit in the bathtub 13, and the unit side control part 5 It is configured to communicate with the remote control.

Hereinafter, the operation of the heat supply facility 100 will be described.
The unit-side control unit 5 includes a hot water storage operation for storing hot water in the hot water storage tank 2, a hot water supply operation for supplying hot water to the hot water tap 16, a hot water operation for performing hot water filling of the bathtub 13, a low temperature water use terminal 14 and a high temperature water use terminal. 15 is configured to perform various operations such as a warm water supply operation for supplying warm water to 15.

(Hot water storage operation)
The hot water storage operation is performed during operation of the combined heat and power supply apparatus 1 and is an operation in which the heat generated in the combined heat and power supply apparatus 1 is stored as hot water in the hot water storage tank 2. Incidentally, it is possible to appropriately change the timing at which the hot water storage operation is started. For example, when the combined heat and power supply device 1 is started, the hot water storage operation can also be started. In addition, the timing at which the hot water storage operation is finished can be appropriately changed. For example, the unit-side control unit 5 is based on detection information of a temperature sensor (not shown) provided in the hot water storage tank 2. When it is determined that the amount of hot water stored in the hot water storage tank 2 is full, the hot water storage operation can be terminated.

  As shown in FIG. 1, the unit-side control unit 5 operates the first circulation pump P1, and uses the first circulation path J1 to recover the heat generated in the combined heat and power supply device 1 to exhaust heat recovery fluid. The supply is circulated to the exchanger 9. And the unit side control part 5 opens the 1st on-off valve K1 and the 2nd on-off valve K2, operates the 2nd circulation pump P2, and the hot water taken out from the lower part of the hot water storage tank 2 by the 2nd circulation path J2 is carried out. The hot water supplied to the exhaust heat exchanger 9 and passed through the exhaust heat exchanger 9 is returned to the upper part of the hot water storage tank 2. As a result, in the waste heat exchanger 9, the hot water taken out from the hot water storage tank 2 is heated by the exhaust heat recovery fluid to generate hot water, and the hot water is returned to the upper part of the hot water storage tank 2 so that the hot water storage tank 2 The hot water is stored in the hot water.

  The hot water storage tank 2 is composed of a sealed tank that stores hot water in a state where temperature stratification is formed such that high temperature hot water is positioned in the upper portion and low temperature hot water is positioned in the lower portion. Then, the unit-side control unit 5 controls the rotational speed of the second circulation pump P2 so that the hot water temperature stored in the hot water storage tank 2 is constant at the hot water storage set temperature, thereby allowing the hot water to pass through the second circulation path J2. The flow rate is adjusted. The hot water storage set temperature can be changed and set according to the type of the combined heat and power supply device 1 installed. For example, when an engine-driven power generation device is installed as the cogeneration device 1, the hot water storage set temperature is set to 75 ° C. When a power generation device equipped with a polymer electrolyte fuel cell is equipped, the hot water storage set temperature is set to 55 ° C. When a power generation device equipped with a solid oxide fuel cell is equipped, the hot water storage set temperature is set to 65 ° C. It is set.

(Hot water operation)
The hot water supply operation is an operation in which the operation is started with the opening operation of the hot water tap 16, the operation is stopped with the closing operation of the hot water tap 16, and hot water at the hot water supply set temperature is supplied to the hot water tap 16. The unit-side control unit 5 opens the first three-way valve S1, takes out hot water from the upper part of the hot water storage tank 2 into the third flow path part R3, and draws the hot water into the third flow path part R3 and the seventh flow path part. It is supplied to the hot water tap 16 by R7. And the unit side control part 5 adjusts the amount of water mixed from the 8th flow-path part R8 by controlling the opening degree of 1st three-way valve S1, so that the warm water temperature supplied to the hot-water tap 16 becomes hot-water supply preset temperature. doing.

(Hot water operation)
The hot water filling operation is an operation for filling the bathtub 13 and is basically the same operation as the hot water supply operation. The unit-side control unit 5 performs the fifth on-off valve K5 in addition to the hot water supply operation. Is opened, the hot water in the seventh flow path part R7 is supplied to the fourth circulation path J4 by the ninth flow path part R9, and the hot water is supplied to the bathtub 13 through the fourth circulation path J4. . In this case, the opening of the first three-way valve S1 is controlled and mixed from the eighth flow path part R8 so that the hot water temperature supplied to the bathtub 13 becomes the hot water set temperature by the unit-side control unit 5. The amount of water is adjusted.

(Hot water supply operation for remembrance)
This hot water supply operation for remedy is started by a remedy request from the bathroom remote controller, and is stopped by finishing the remedy of hot water in the bathtub 13. The unit-side controller 5 opens the first on-off valve K1, the second on-off valve K2, and the third on-off valve K3 to operate the second circulation pump P2, and the hot water taken out from the upper part of the hot water storage tank 2 is third. A part of the hot water that is supplied to the first heat radiating part 11 through the circulation path J3 and passes through the first heat radiating part 11 is returned to the lower part of the hot water storage tank 2, and the remaining part of the hot water is circulated by the second circulation path J2. ing. And the unit side control part 5 operates the 3rd circulation pump P3, and circulates the hot water in the bathtub 13 between the bathtub 13 and the 1st thermal radiation part 11 by the 4th circulation path J4. Thereby, the hot water in the bathtub 13 is heated with the hot water taken out from the upper part of the hot water storage tank 2 in the first heat radiating section 11, and the heated hot water is returned into the bathtub 13. I'm doing a trap. About the hot water temperature supplied to the 1st thermal radiation part 11, the temperature which can heat the hot water in the bathtub 13 to desired temperature is set, for example. When the hot water temperature stored in the hot water storage tank 2 is lower than the set temperature, the unit-side control unit 5 performs heating by the auxiliary heating unit 10 and the hot water heated by the auxiliary heating unit 10 And hot water taken out from the hot water storage tank 2 are mixed, so that hot water not lower than the set temperature is supplied to the first heat radiating section 11.

(Hot water supply operation for hot water use terminals)
As the hot water supply operation for the hot water use terminal, the hot water stored in the hot water storage tank 2 is not supplied to the first heat radiating unit 11 but the hot water stored in the hot water storage tank 2 is supplied to the second heat radiating unit 12. Like to do. In this case, the operation is started by an operation request from the low temperature water use terminal 14 and the high temperature water use terminal 15, and the operation is stopped by an operation end command from the low temperature water use terminal 14 and the high temperature water use terminal 15. In this way, the unit-side control unit 5 performs the hot water supply operation when operating the low temperature water use terminal 14 and the hot water use terminal of the high temperature water use terminal 15.

(Hot water supply operation for low temperature water use terminal)
First, the case where the low-temperature water utilization terminal 14 is operated will be described. The unit-side controller 5 opens the first on-off valve K1, the second on-off valve K2, and the fourth on-off valve K4 to operate the second circulation pump P2, and the hot water taken out from the upper part of the hot water storage tank 2 is third. A part of the hot water that has been supplied to the second heat radiating part 12 by the circulation path J3 and passed through the second heat radiating part 12 is returned to the lower part of the hot water storage tank 2, and the remaining part of the hot water is circulated by the second circulation path J2. ing. The unit-side control unit 5 opens the sixth on-off valve K6 to operate the fourth circulation pump P4, and circulates hot water between the low temperature water use terminal 14 and the second heat radiating unit 12 through the fifth circulation path J5. I am letting. Thereby, hot water is heated with the hot water taken out from the upper part of the hot water storage tank 2 in the 2nd thermal radiation part 12, and the heated hot water is supplied to the low temperature water utilization terminal 14 as warm water.

  Since the low temperature water use terminal 14 receives supply of warm water heated by the second heat radiating unit 12, operation is performed using the warm water. For example, if the low-temperature water use terminal 14 is a floor heating device, the floor heating device performs a floor heating operation for supplying the warm water to the floor heating panel when supplied with hot water.

  About the hot water temperature supplied to the 2nd thermal radiation part 12, in order to perform the driving | operation, the low temperature water utilization terminal 14 receives the supply of low temperature water (for example, 40 degreeC and 60 degreeC), and operates using the low temperature water. The hot water temperature supplied to the second heat radiating unit 12 is set to a set temperature for low temperature water (for example, 40 ° C. or 60 ° C.). Regarding the setting of the set temperature for low-temperature water, the unit-side control unit 5 acquires information on the required temperature of the low-temperature water use terminal 14 through communication from a terminal-side remote controller (not shown) of the low-temperature water use terminal. The set temperature for low-temperature water is set according to the required temperature. When the temperature of the hot water stored in the hot water storage tank 2 is equal to or higher than the set temperature for low temperature water, the unit-side control unit 5 does not perform heating by the auxiliary heating unit 10 and uses the hot water in the hot water storage tank 2 as it is as the second heat release. It supplies to the part 12. When the hot water temperature stored in the hot water storage tank 2 is lower than the set temperature for low-temperature water, the unit-side control unit 5 performs heating by the auxiliary heating unit 10 and the hot water heated by the auxiliary heating unit 10 And the hot water taken out from the hot water storage tank 2 are mixed so that the mixed hot water is at or above the set temperature for low-temperature water, and the mixed hot water at or above the set temperature for low-temperature water is supplied to the second heat radiating unit 12.

(Hot water supply operation for high temperature water use terminal)
Next, the case where the high temperature water utilization terminal 15 is operated is demonstrated. The unit-side controller 5 opens the first on-off valve K1, the second on-off valve K2, and the fourth on-off valve K4 to operate the second circulation pump P2, and the hot water taken out from the upper part of the hot water storage tank 2 is third. A part of the hot water that has been supplied to the second heat radiating part 12 by the circulation path J3 and passed through the second heat radiating part 12 is returned to the lower part of the hot water storage tank 2, and the remaining part of the hot water is circulated by the second circulation path J2. ing. The unit-side control unit 5 opens the seventh on-off valve K7 to operate the fourth circulation pump P4, and circulates hot water between the high-temperature water use terminal 15 and the second heat radiating unit 12 through the sixth circulation path J6. I am letting. Thereby, hot water is heated with the hot water taken out from the upper part of the hot water storage tank 2 in the 2nd thermal radiation part 12, and the heated hot water is supplied to the high temperature water utilization terminal 15 as warm water.

  The high-temperature water use terminal 15 normally receives the supply of high-temperature water (for example, 75 ° C. or 80 ° C .: this temperature is the “required temperature” described above) so that the operation using the high-temperature water is performed. Therefore, in order to operate the high temperature water use terminal 15, high temperature water (for example, 75 ° C. or 80 ° C.) is required as the hot water temperature supplied from the second unit Y 2 to the high temperature water use terminal 15. It will be. Therefore, the hot water temperature supplied to the second heat radiating unit 12 is the high temperature water (for example, 75 ° C. or 80 ° C.) serving as the high temperature water set temperature, and the hot water temperature stored in the hot water storage tank 2 is higher than the high temperature water set temperature. When the temperature is low, it is necessary to perform heating by the auxiliary heating unit 10. However, if heating is always performed by the auxiliary heating unit 10, not only the hot water stored in the hot water storage tank 2 can be used effectively, but also the energy consumption increases accordingly.

  Therefore, in this embodiment, in order to operate the hot water use terminal 15 while effectively using the hot water stored in the hot water storage tank 2, the unit-side control unit 5 performs the hot water supply terminal 15 in the hot water supply operation. As a supply mode for supplying hot water to the heating system, a heating supply mode in which heating is performed by the auxiliary heating unit 10 and a non-heating supply mode in which heating is not performed by the auxiliary heating unit 10 are configured to be executable.

(Heating supply mode)
The heating supply mode will be described with reference to FIGS. FIG. 3 schematically illustrates the main part in FIG. 1, and a portion through which a fluid flows and a device to be operated are indicated by bold lines. The unit side control unit 5 performs heating by the auxiliary heating unit 10, mixes the hot water heated by the auxiliary heating unit 10 and the hot water taken out from the hot water storage tank 2, and sets the mixed hot water to a set temperature for high-temperature water. As described above, hot water equal to or higher than the set temperature for high-temperature water is supplied to the second heat radiating unit 12. Thereby, in the 2nd thermal radiation part 12, hot water is heated with the high temperature water, and high temperature water (for example, 75 degreeC or 80 degreeC) can be produced | generated, and the high temperature water is utilized by the 6th circuit J6. This is supplied to the terminal 15. In this way, in the hot water supply operation in the heating supply mode, the hot water temperature supplied to the second heat radiating unit 12 is changed to the set temperature for high temperature water (for example, 75 ° C. or 80 ° C.) by performing heating by the auxiliary heating unit 10. As described above, heated water (for example, 75 ° C. or 80 ° C.) is generated using the warm water heated by the auxiliary heating unit 10 as a heat source, and the heated warm water is supplied to the high-temperature water use terminal 15. And the warm water supply part 4 is comprised from the 2nd circulation path J2, the 3rd circulation path J3, the 6th circulation path J6, etc., and the unit side control part 5 is the single connected to the high temperature water utilization terminal 15. The hot water supply section 4 is switched to the first supply state in which heated hot water is supplied through the hot water supply pipe 210 (the high temperature side forward flow path portion 20).

(Non-heating supply mode)
The non-heating supply mode will be described with reference to FIGS. FIG. 4 schematically shows the main part in FIG. 1, and the parts through which the fluid flows and the devices to be operated are indicated by bold lines. The unit-side control unit 5 does not perform heating by the auxiliary heating unit 10 and supplies the hot water taken out from the hot water storage tank 2 to the second heat radiating unit 12 as it is. Thereby, in the 2nd thermal radiation part 12, hot water can be heated with the warm water of the hot water storage tank 2, and warm water can be produced | generated, and the warm water is supplied to the high temperature water utilization terminal 15 by the 6th circuit J6. As described above, in the hot water supply operation in the non-heating supply mode, the heating by the auxiliary heating unit 10 is not performed, so that the second heat radiating unit 12 generates non-heating hot water using the hot water in the hot water storage tank 2 as a heat source. Non-heated hot water is supplied to the high-temperature water use terminal 15. The unit-side control unit 5 puts the hot water supply unit 4 into a second supply state in which unheated hot water is supplied through a single hot water supply pipe 210 (high temperature side forward flow path part 20) connected to the high temperature water use terminal 15. Switching.

(Operation of high-temperature water terminal)
As described above, when the hot water is supplied to the high temperature water use terminal 15, the second unit Y2 side performs the hot water supply operation in the heating supply mode and the hot water supply operation in the non-heating supply mode by the unit side control unit 5. Configured to be executable. Therefore, in order to operate the high temperature water use terminal 15 in both the hot water supply operation in the heating supply mode and the hot water supply operation in the non-heating supply mode, the terminal side control unit 213 performs the operation of the high temperature water use terminal 15. A temperature limiting mode for operating the operation unit when the hot water temperature received by the hot water receiving unit 205 is equal to or higher than the required temperature, and stopping the operation unit when the received hot water temperature is lower than the required temperature; Regardless of the hot water temperature received by the receiving unit 205, a temperature non-restriction mode in which the driving operation unit is operated and operated can be executed. Hereinafter, the high-temperature water use terminal 15 will be described as the bathroom drying apparatus 200.

(Temperature limit mode)
First, the temperature limit mode will be described with reference to FIGS. The terminal-side control unit 213 assumes that the hot water temperature received by the hot water supply pipe 210 is high-temperature water that is equal to or higher than the required temperature (for example, 75 ° C. or 80 ° C.) and opens the thermal valve 211 to exchange heat of the high-temperature water. The hot water supplied to the unit 204 and passed through the heat exchanging unit 204 is discharged through the hot water discharge pipe 212. Thereby, in the heat exchange part 204, the air which flows through the circulation path 206 can be heated with the supplied high temperature water (for example, 75 degreeC or 80 degreeC). The terminal-side control unit 213 operates the suction fan 207 to heat a part of the air sucked from the bathroom 202 by the circulation path 206 in the heat exchanging unit 204 and return the heated air to the bathroom 202. I have to. The terminal-side control unit 213 not only operates the suction fan 207 but also operates the exhaust fan 209 to exhaust part of the air sucked from the bathroom 202 through the exhaust path 208 to the outside. In this way, the terminal-side control unit 213, when the hot water temperature received by the hot water supply pipe 210 is high-temperature water that is equal to or higher than the required temperature (for example, 75 ° C. or 80 ° C.), In addition, by operating the operation unit such as the exhaust fan 209 and heating a part of the air sucked from the bathroom 202 by the heat exchange unit 204 and returning it to the bathroom 202, the remaining part of the air is exhausted to the outside. I am trying to do dry operation.

  In this temperature limit mode, since the hot water supplied to the heat exchange unit 204 is high-temperature water (for example, 75 ° C. or 80 ° C.), the terminal-side control unit 213 sets the temperature of the air returned to the bathroom 202 by the high-temperature water. The rotational speeds of the suction fan 207 and the exhaust fan 209 are controlled so as to heat to the set temperature for temperature restriction. The set temperature for temperature limitation can be set according to the set temperature for operation set by the terminal-side remote controller, or can be set in advance by experiments or the like. In this temperature limit mode, since the hot water temperature received by the hot water supply pipe 210 is high-temperature water that is equal to or higher than the required temperature (for example, 75 ° C. or 80 ° C.), the terminal-side control unit 213 is connected to the hot water supply pipe 210. If the temperature of the hot water supplied is less than the required temperature, the operation unit is stopped and a high temperature water request command for supplying high temperature water at the required temperature to the unit side control unit 5 is performed. Yes. In addition, for example, the terminal-side control unit 213 determines that the hot water temperature supplied by the hot water supply pipe 210 is lower than the required temperature or the hot water supplied by the hot water supply pipe 210 even if a high temperature water request command is issued. If the state where the temperature is lower than the required temperature continues, the thermal valve 211 can be closed to stop the operation of the high-temperature water use terminal 15. In this way, the terminal-side control unit 213, when the hot water temperature received by the hot water supply pipe 210 is high-temperature water that is equal to or higher than the required temperature (for example, 75 ° C. or 80 ° C.), In addition, the operation unit such as the exhaust fan 209 is operated to switch to the first supply state in which hot water is supplied to the heat exchange unit 204. In addition, the terminal-side control unit 213 limits the operation of the driving operation unit to stop the driving operation unit when the hot water temperature received by the hot water supply pipe 210 is lower than a required temperature (for example, 75 ° C. or 80 ° C.). Added.

  Incidentally, when the unit-side control unit 5 receives the high temperature water request command, the heating by the auxiliary heating unit 10 is started if the heating by the auxiliary heating unit 10 is not performed, and the heating by the auxiliary heating unit 10 is performed. The auxiliary heating unit 10 is controlled so as to increase the amount of heating when it is in the middle, for example, by supplying high-temperature water (for example, 75 ° C. or 80 ° C.) having a required temperature to the high-temperature water use terminal 15.

(Temperature unrestricted mode)
Next, the temperature non-limiting mode will be described with reference to FIGS. Regardless of the hot water temperature received by the hot water supply pipe 210, the terminal-side control unit 213 opens the thermal valve 211 to supply the hot water to the heat exchanging unit 204, and the hot water that has passed through the heat exchanging unit 204 is warm water. A discharge pipe 212 is used for discharge. Thereby, in the heat exchanging part 204, the air flowing through the circulation path 206 can be heated with the supplied hot water. The terminal-side control unit 213 operates the suction fan 207 to heat a part of the air sucked from the bathroom 202 by the circulation path 206 in the heat exchanging unit 204 and return the heated air to the bathroom 202. I have to. The terminal-side control unit 213 not only operates the suction fan 207 but also operates the exhaust fan 209 to exhaust part of the air sucked from the bathroom 202 through the exhaust path 208 to the outside. In this way, the terminal-side control unit 213 operates part of the air sucked from the bathroom 202 by operating the operation units such as the thermal valve 211, the suction fan 207, and the exhaust fan 209. While being heated at 204 and returned to the bathroom 202, a drying operation for exhausting the remaining part of the air to the outside is performed.

  In this temperature non-restriction mode, since the operation is performed regardless of the temperature of the hot water supplied to the heat exchange unit 204, the air heated in the heat exchange unit 204 cannot be heated to the temperature restriction set temperature as in the temperature restriction mode. Sometimes. Therefore, the terminal-side control unit 213, for example, the suction fan 207 so as to heat the temperature of the air returned to the bathroom 202 by the heat exchange unit 204 to a temperature non-limiting set temperature (lower temperature than the temperature limiting set temperature). In addition, the rotational speed of the exhaust fan 209 can be controlled. The temperature non-limiting set temperature is set to be a constant lower temperature than the temperature limiting set temperature as a reference, or lower than the temperature limiting set temperature regardless of the temperature limiting set temperature. Can be set as follows. Further, instead of such control, the terminal-side control unit 213 can also control the rotational speeds of the suction fan 207 and the exhaust fan 209 so as to be a constant rotational speed of the temperature non-limiting rotational speed. In this temperature non-restriction mode, even if the temperature of the hot water supplied to the heat exchanging unit 204 decreases, the terminal-side control unit 213 does not issue a high-temperature water request command to the unit-side control unit 5, and the thermal valve 211 Is kept open. In this way, the terminal-side control unit 213 operates the operation units such as the thermal valve 211, the suction fan 207, and the exhaust fan 209, and heats regardless of the hot water temperature through which the hot water supply pipe 210 flows. Switching to the second supply state in which hot water is supplied to the exchange unit 204 is performed.

  The bathroom drying apparatus 200 performs a bathroom drying operation as one of the operations, but the terminal-side control unit 213 opens, for example, the thermal valve 211 to supply hot water to the heat exchange unit 204. In the bathroom heating operation, after supplying the air, only the suction fan 207 is operated without operating the exhaust fan 209, and the entire amount of air sucked from the bathroom 202 is heated by the heat exchange unit 204 and returned to the bathroom 202. Like to do. Since this bathroom heating operation is also an operation for receiving supply of hot water, the terminal-side control unit 213 is configured to be able to execute a temperature restriction mode and a temperature non-restriction mode when performing the bathroom heating operation. In addition to the bathroom drying operation and the bathroom heating operation, the terminal-side control unit 213 operates only the exhaust fan 209 without supplying hot water to the heat exchanging unit 204, and the air sucked from the bathroom 202 is supplied. Ventilation operation that exhausts a part to the outside is also possible.

(Mode selection)
As described above, the unit-side control unit 5 can execute the heating supply mode and the non-heating supply mode as the hot water supply operation for supplying the hot water to the high-temperature water utilization terminal 15. As operation of the use terminal 15, a temperature limit mode and a temperature non-limit mode can be executed. Therefore, the unit-side control unit 5 selects whether to execute the heating supply mode or the non-heating supply mode when performing the hot water supply operation for supplying the hot water to the high temperature water use terminal 15. In addition, the terminal-side control unit 213 also selects whether to execute the temperature limit mode or the temperature non-limit mode when operating the high-temperature water use terminal 15. Hereinafter, this mode selection will be described.

  As shown in FIGS. 1 and 2, the terminal-side remote controller 214 has an operation command unit 215 for instructing various operation start and operation stop, a display unit 216 for displaying a set temperature, an operation state, and the like, and non-heating supply. And a mode command unit 217 that commands a mode and a temperature non-limiting mode. Thereby, the unit-side control unit 5 and the terminal-side control unit 213 recognize that the non-heating supply mode and the temperature non-limiting mode are instructed by the mode command unit 217 by communication with the terminal-side remote controller 214. Can do. Therefore, as a condition for the unit-side control unit 5 to execute the non-heating supply mode, the non-heating supply mode is instructed by the mode command unit 217, and the condition for the terminal-side control unit 213 to execute the temperature non-limiting mode. As described above, the mode non-limiting mode is commanded by the mode command unit 217.

  Further, if the hot water temperature stored in the hot water storage tank 2 is excessively lower than the required temperature (for example, 75 ° C. or 80 ° C.) for operating the high temperature water use terminal 15, the hot water is generated as a heat source. When hot water is supplied to the high-temperature water use terminal 15, hot water having a temperature that is excessively lower than the required temperature is supplied to the high-temperature water use terminal 15. Therefore, as a condition for the unit-side control unit 5 to execute the non-heating supply mode, the hot water temperature stored in the hot water storage tank 2 is set to the mode in addition to the non-heating supply mode commanded by the mode command unit 217. It is assumed that the temperature is higher than the set temperature for determination. As a condition for the terminal-side control unit 213 to execute the temperature non-limiting mode, in addition to the command of the temperature non-limiting mode being commanded by the mode command unit 217, the hot water temperature received by the hot water receiving unit 205 is the mode discrimination setting. It is supposed to be above the temperature. As for the set temperature for mode discrimination, a temperature lower than a required temperature (for example, 75 ° C. or 80 ° C.) for operating the high-temperature water use terminal 15 is set. Accordingly, the mode discrimination set temperature can be changed and set. For example, when an engine-driven power generator is equipped as the combined heat and power supply 1, the mode discrimination setting temperature is set to 60 ° C., and when a power generator equipped with a polymer electrolyte fuel cell is equipped, the mode discrimination setting is set. When the temperature is set to 50 ° C. and a power generator equipped with a solid oxide fuel cell is equipped, the mode discrimination set temperature is set to 40 ° C.

Hereinafter, the mode selection by the unit-side controller 5 will be described based on the flowchart of FIG.
First, the unit-side control unit 5 determines whether or not the non-heating supply mode is commanded by the mode command unit 217 through communication with the terminal-side remote controller 214 (step # 1). When the non-heating supply mode is commanded, the unit-side control unit 5 performs a temperature determination process for determining whether or not the hot water temperature stored in the hot water storage tank 2 is equal to or higher than the mode determination set temperature. (Step # 2). Here, the temperature of the hot water stored in the hot water storage tank 2 is the temperature of the hot water taken out from the hot water storage tank 2. For example, the temperature of the hot water can be obtained by a temperature sensor or the like disposed at the top of the hot water storage tank 2. it can. If the temperature of the hot water stored in the hot water storage tank 2 is equal to or higher than the set temperature for mode determination (Yes in Step # 3), the unit-side control unit 5 executes the non-heating supply mode (Step # 4). When the non-heating supply mode is not commanded by the mode command unit 217 (No in step # 1), the unit-side control unit 5 uses the hot water temperature stored in the hot water storage tank 2 for mode discrimination. If the temperature is lower than the set temperature (No in step # 3), the heating supply mode is executed (step # 5).

Hereinafter, mode selection by the terminal-side control unit 213 will be described based on the flowchart of FIG.
First, the terminal-side control unit 213 determines whether or not the mode non-limiting mode is commanded by the mode command unit 217 through communication with the terminal-side remote controller 214 (step # 11). When the temperature non-restriction mode is instructed, the terminal-side control unit 213 determines whether or not the hot water temperature received by the hot water receiving unit 205 is equal to or higher than the mode determination set temperature (step # 12). Here, although the illustration of the hot water temperature received by the hot water receiving unit 205 is omitted, the hot water temperature can be acquired by a temperature sensor or the like disposed in the middle of the hot water supply pipe 210. If the hot water temperature received by the hot water receiving unit 205 is equal to or higher than the mode determination set temperature, the terminal side control unit 213 executes the temperature non-restriction mode (step # 13). The terminal-side control unit 213 sets the mode discrimination setting when the mode command unit 217 does not command the temperature non-restriction mode (No in step # 11) and the hot water temperature received by the hot water receiving unit 205. When the temperature is lower (No in Step # 12), the temperature restriction mode is executed (Step # 14).

  As described above, when the unit-side control unit 5 receives a command from the mode command unit 217, the unit-side control unit 5 can perform the hot water supply operation in the non-heating supply mode after performing the temperature discrimination process. When the command by the command unit 217 is not received, the hot water supply operation in the heating supply mode is performed. If the hot water temperature stored in the hot water storage tank 2 is equal to or higher than the mode discrimination set temperature, the hot water temperature received by the hot water receiving unit 205 is usually equal to or higher than the mode discrimination set temperature. If the temperature of the hot water stored in the hot water storage tank 2 is equal to or higher than the mode determination set temperature, the unit-side control unit 5 performs the non-heating supply mode and the terminal side The control unit 213 performs the temperature non-limiting mode.

  As described above, when the temperature condition as a result of the temperature discrimination process is not satisfied, the non-heating supply mode is executed by the unit-side control unit 5 and the temperature non-limitation mode is executed by the terminal-side control unit 213. I will not. Therefore, the user can easily determine whether or not the unit-side control unit 5 can execute the non-heating supply mode and the terminal-side control unit 213 can execute the temperature non-limit mode. A mode display unit 218 is provided on the terminal-side remote controller 214 so that it can be recognized. The mode display unit 218 is turned on when the temperature of hot water stored in the hot water storage tank 2 is equal to or higher than the set temperature for mode determination, so that the unit-side control unit 5 executes the non-heating supply mode, and the terminal side It is displayed that the control unit 213 can execute the temperature non-restriction mode.

  The set temperature for mode discrimination in the temperature discrimination process can be changed and set within a temperature range lower than the required temperature required for the high-temperature water use terminal 15 (for example, 75 ° C. or 80 ° C.). The setting can be changed according to the type of the device 1. In order to change and set the set temperature for mode discrimination, as shown in FIG. 1, the terminal-side remote controller 214 has a human-operated input unit that can freely input type information about the type of the combined heat and power supply device 1. 219 is provided. The input unit 219 includes a dip switch. By operating the dip switch, type information about the type of the cogeneration apparatus 1 can be input. In this embodiment, for example, as a combined heat and power device, there are three types of power generation: an engine-driven power generation device, a power generation device including a solid polymer fuel cell, and a power generation device including a solid oxide fuel cell. Since the device can be equipped, it is possible to select which power generation device is equipped with a dip switch. For example, as shown in the table of FIG. 7, when the engine-driven power generation device C1 is equipped, X1 is turned on with a dip switch, and the power generation device C2 equipped with a solid oxide fuel cell is equipped. In this case, X2 is turned on with the dip switch, and when the power generation device C3 having the solid oxide fuel cell is installed, X3 is turned on with the dip switch.

As described above, when the type information about the type of the cogeneration apparatus 1 is input at the input unit 219, the unit-side control unit 5 and the terminal-side control unit 213 communicate with the terminal-side remote controller 214 through the input information. It is possible to recognize which type of cogeneration apparatus 1 is equipped. For example, as shown in the table of FIG. 7, when the X1 is turned on by the DIP switch of the input unit 219, the unit-side control unit 5 and the terminal-side control unit 213 have an engine-driven power generation device C1. Is set, the mode discrimination set temperature is set to 60 ° C. In addition, the unit-side control unit 5 and the terminal-side control unit 213 are equipped with a power generation device C2 including a solid oxide fuel cell when X2 is turned on by the DIP switch of the input unit 219. The mode discrimination set temperature is set to 50 ° C. Furthermore, the unit-side control unit 5 and the terminal-side control unit 213 are equipped with a power generation device C3 equipped with a solid oxide fuel cell when X3 is turned ON by the DIP switch of the input unit 219. The mode discrimination set temperature is set to 40 ° C.
Further, the unit-side control unit 5 can acquire input information from the input unit 219 through communication with the terminal-side remote controller 214 and can recognize which type of the combined heat and power supply device 1 is installed. Based on the input information, the hot water storage set temperature is also changed and set.

  As shown in FIG. 1, the cogeneration apparatus 1 is provided as a first unit Y that is separable from the second unit Y2, so which of the plurality of types of cogeneration apparatuses 1 is equipped. If it selects, the heat supply equipment 100 can be comprised by connecting the 1st unit Y1 provided with the selected cogeneration apparatus 1 to the 2nd unit Y2. As described above, when the first unit Y1 provided with the combined heat and power supply device 1 and the second unit Y2 provided with the hot water storage tank 2 are separable, any one of a plurality of types of combined heat and power supply devices 1 is provided. However, the installation work can be simplified.

[Second Embodiment]
This second embodiment is a reference embodiment of the present invention , and in what timing is the temperature discrimination process in the first embodiment, and the heating supply mode is based on the discrimination result of the temperature discrimination process. And a hot water supply operation in any one of the non-heating supply mode. Since other configurations are the same as those in the first embodiment, the timing for performing the temperature determination process will be described.

In the first embodiment, when the unit-side control unit 5 receives a command from the mode command unit 217, the unit-side control unit 5 performs temperature discrimination processing, and based on the discrimination result of the temperature discrimination processing, the heating supply mode and non- The hot water supply operation is performed in one of the heating supply modes.
In the second embodiment, when the unit-side control unit 5 performs the hot water supply operation, the temperature determination process is always performed, and either the heating supply mode or the non-heating supply mode is performed based on the determination result of the temperature determination process. The hot water supply operation is performed at That is, step # 1 in FIG. 5 is omitted, and the unit-side control unit 5 always performs a temperature determination process when receiving an operation request from the terminal-side remote controller 214 of the high-temperature water using terminal 15. If the hot water temperature stored in the hot water storage tank 2 is equal to or higher than the set temperature for mode discrimination, the unit side control unit 5 executes the non-heating supply mode, and the hot water temperature stored in the hot water storage tank 2 is set to the mode. If it is less than the set temperature for determination, the heating supply mode is executed.

  In the second embodiment, when the operation request is received from the terminal-side remote controller 214, the unit-side control unit 5 performs the temperature determination process, so the mode command unit 217 may not be provided. When the mode command unit 217 is not provided as described above, step # 11 in FIG. 6 is omitted, and when the terminal-side control unit 213 receives an operation request from the terminal-side remote controller 214, the hot water receiving unit 205 If the received hot water temperature is equal to or higher than the mode discrimination set temperature, the temperature non-limiting mode is executed. If the hot water temperature received by the hot water receiving unit 205 is lower than the mode discrimination set temperature, the temperature limiting mode is executed.

[Third Embodiment]
The third embodiment is another embodiment of how to change and set the mode discrimination set temperature in the first and second embodiments. Since other configurations are the same as those in the first and second embodiments, a configuration for changing and setting the mode discrimination set temperature will be described.

  In order to change and set the mode discrimination setting temperature, as in the input unit 210 shown in FIG. 1, although not shown, the unit-side remote control and the terminal-side remote control 214 are equipped with the high-temperature water use terminal 15. An artificially operated input unit is provided that can freely input temperature information about the required temperature. The input unit includes, for example, a push type or rotary type operation unit, and the user can operate the operation unit to input temperature information about the required temperature of the high-temperature water use terminal 15. Yes. In this embodiment, for example, a required temperature of 80 ° C. and a required temperature of 60 ° C. can be requested.

  Thus, when the temperature information about the required temperature of the high-temperature water use terminal 15 is input at the input unit, the unit side control unit 5 and the terminal side control unit 213 communicate with the unit side remote control terminal side remote control 214. The input information can be acquired to recognize what temperature is required. Therefore, for example, when the required temperature of 80 ° C. is set, the unit-side control unit 5 and the terminal-side control unit 213 set the mode discrimination setting temperature to 70 ° C., and the required temperature of 60 ° C. Is set, the mode discrimination set temperature is set to 50 ° C.

  In the said 1st Embodiment, the setting temperature for mode discrimination | determination is changed and set according to the kind of the cogeneration apparatus 1 equipped, In this 3rd Embodiment, the request | requirement currently requested | required by the high temperature water utilization terminal 15 equipped. The set temperature for mode discrimination is changed according to the temperature. Instead of this configuration, the mode determination set temperature can be changed and set according to both the type of the combined heat and power supply device 1 to be equipped and the required temperature required for the high-temperature water use terminal 15 to be equipped. . Thus, taking into account the characteristics of both the hot water use terminal and the combined heat and power supply device installed in the heat supply facility, the mode discrimination set temperature that becomes the mode switching threshold temperature between the heating supply mode and the non-heating supply mode Can be changed.

[Another embodiment ]

( 1 ) In the said 1st-3rd embodiment, when supplying the hot water which uses the hot water currently stored in the hot water storage tank 2 as a heat source to the high temperature water utilization terminal 15, the 2nd thermal radiation part 12 was provided and the hot water storage tank 2 was provided. Hot water is heated with hot water taken out from the hot water to generate hot water, and the generated hot water is supplied to the high-temperature water use terminal 15. Instead of this configuration, for example, hot water stored in the hot water storage tank 2 can be supplied as it is to the high temperature water use terminal 15, and the hot water supplied to the high temperature water use terminal 15 uses the hot water in the hot water storage tank 2 as a heat source. What is necessary is just to be a thing, and it can change suitably about the warm water supply structure of how to supply.

( 2 ) In the first and second embodiments, the terminal-side remote controller 214 includes the input unit 219 for inputting type information about the type of the combined heat and power supply apparatus 1 provided. Alternatively, in addition to the terminal-side remote controller 214 and the unit-side remote controller, an input unit that can communicate with the unit-side control unit 5 and the terminal-side control unit 213 may be provided.

( 3 ) In the first and second embodiments, three types of cogeneration devices are exemplified as the cogeneration device 1. However, for example, the number of types of cogeneration devices 1 to be equipped can be changed as appropriate. Two types or four or more types may be used.

  The present invention relates to a combined heat and power device that generates heat and electric power, a hot water storage tank that stores hot heat generated by the combined heat and power supply device as hot water, and a hot water use terminal that receives the supply of hot water and operates using the hot water And a hot water supply unit that supplies hot water stored in the hot water storage tank as a heat source to the hot water use terminal as a heat source for operating the hot water use terminal while saving energy. It can be applied to various heat supply facilities that can effectively use the hot water stored in the tank.

DESCRIPTION OF SYMBOLS 1 Cogeneration apparatus 2 Hot water storage tank 4 Hot water supply part 5 Unit side control part (operation control part)
DESCRIPTION OF SYMBOLS 10 Auxiliary heating part 14 Low temperature water utilization terminal 15 High temperature water utilization terminal 217 Mode command part 218 Mode display part 219 Input part (dip switch)

Claims (7)

A heat and power supply device that generates heat and electric power, a hot water storage tank that stores the heat generated by the heat and power supply device as hot water, and a supply of hot water that uses hot water stored in the hot water storage tank as a heat source. A hot water use terminal to perform, a hot water supply unit for supplying hot water using hot water stored in the hot water storage tank as a heat source to the hot water use terminal, an auxiliary heating unit capable of heating hot water, the hot water supply unit and the auxiliary An operation control unit for controlling the operation of the heating unit and performing hot water supply operation for supplying hot water to the hot water use terminal,
The hot water use terminal is a bathroom dryer;
The operation control unit performs a temperature determination process to determine whether the hot water temperature of the hot water storage tank is equal to or higher than a mode determination set temperature,
When the hot water temperature of the hot water storage tank is lower than the set temperature for mode discrimination, heating is performed by the auxiliary heating unit, and heated hot water using the hot water heated by the auxiliary heating unit as a heat source is heated by the hot water supply unit. Perform hot water supply operation in the heating supply mode to supply to the hot water use terminal,
When the hot water temperature of the hot water storage tank is equal to or higher than the set temperature for mode determination, heating by the auxiliary heating unit is not performed, and the hot water supply unit supplies unheated hot water using the hot water of the hot water storage tank as a heat source as it is as the hot water. It is configured to perform hot water supply operation in the non-heating supply mode that supplies to the user terminal,
About the set temperature for mode discrimination, it is configured to be freely changeable within a temperature range lower than the required temperature required for the hot water use terminal ,
The operation control unit is provided with an artificially operated mode command unit that commands the non-heating supply mode, and the operation control unit performs the temperature determination process when receiving a command from the mode command unit. Perform the hot water supply operation in either the heating supply mode or the non-heating supply mode based on the determination result of the temperature determination processing, and if the command from the mode command unit is not received, the heating Heat supply equipment configured to perform hot water supply operation in the supply mode .   The heat supply facility according to claim 1, wherein the set temperature for mode determination is configured to be freely changeable according to the type of the cogeneration apparatus.   An artificially operated input unit that can freely input type information about the type of the combined heat and power supply device that is equipped is provided, the operation control unit, according to the type information of the combined heat and power supply device input to the input unit, The heat supply facility according to claim 2, wherein the setting temperature for mode discrimination is changed and set.   The heat supply facility according to claim 1, wherein the set temperature for mode determination is configured to be freely changeable and settable according to a required temperature required for the hot water utilization terminal equipped.   An artificially operated input unit capable of freely inputting temperature information about a required temperature required for the hot water utilization terminal to be installed is provided, and the operation control unit is a temperature about the required temperature input to the input unit. The heat supply facility according to claim 4, wherein the set temperature for mode determination is changed and set according to information.   The heat supply according to claim 1, wherein the set temperature for mode discrimination is configured to be freely changeable according to a required temperature required for the hot water use terminal equipped and a type of the combined heat and power supply device equipped. Facility. The mode display part which displays that the hot water supply operation in the said non-heating supply mode is executable when the hot water temperature of the said hot water storage tank is more than the said setting temperature for mode discrimination | determination is provided. The heat supply facility according to any one of the above.

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