JP5037985B2 - Bath equipment - Google Patents

Description

  The present invention includes a heat storage tank for storing heat storage water, hot water supply means for performing a hot water supply operation for supplying hot water to the bathtub using the heat storage water of the heat storage tank, and the hot water state of the bathtub is a target hot water state. It is related with the bath apparatus provided with the operation control means which performs the hot water filling operation which makes the said warm water supply means operate | move hot water supply.

In the bath apparatus as described above, when the operation control means performs a hot water filling operation, in the heat exchanger for hot water, the water supply is heated with the heat storage water in the heat storage tank, and the heated water supply is supplied to the bathtub, or In the reheating heat exchanger, the bathtub water stored in the bathtub is heated with the heat storage water of the heat storage tank, the heated bathtub water is returned to the bathtub, and the hot water condition of the bathtub is set as the target hot water condition. . The target hot water filling state is determined from the temperature and the storage amount, and the state where hot water at the hot water filling set temperature is stored in the bathtub is set as the target hot water filling state.
Thus, since the heat stored in the heat storage tank is used, it is necessary to store heat in the heat storage tank.
Therefore, in the conventional bath device, the heat storage water circulating means that circulates the heat storage water taken out from the heat storage tank and returns it to the heat storage tank, and the heat storage water flowing through the circulation path convey the exhaust heat of the combined heat and power supply device. An exhaust heat exchanger that heats with the exhaust heat transfer fluid, and the operation control means stores the exhaust heat of the combined heat and power unit in the heat storage tank by performing a heat storage operation that operates the combined heat and power supply device and the heat storage water circulation means. is doing.
The operation control means calculates the future heat load based on the past heat load, obtains the predicted heat load of how much heat load in which time zone on the day of operation, and the predicted heat load Based on this, the heat storage operation is performed so as to cover the heat load on the day of operation (see, for example, Patent Document 1).

JP 2005-76892 A

In the above conventional bath apparatus, the operation control means performs the heat storage operation so as to cover the heat load on the day of operation based on the predicted heat load. The total amount of heat required is stored in advance in the heat storage tank. In hot water operation, since it is required that the hot water condition of the bathtub can be changed to the target hot water condition even when the bathtub is empty, the amount of heat necessary for making the hot water condition of the bathtub into the target hot water condition is reduced. It has become a big thing. Therefore, if the total amount of heat required to change the hot water condition of the bathtub to the target hot water condition is stored in the heat storage tank in advance, a heat storage tank with a larger capacity is required. This will lead to an increase in size.
For example, when a state where hot water at 42 ° C. is stored in about 180 liters is set as a target hot water filling state, it is usually used for hot water supply such as a shower in addition to the amount of heat for performing the hot water filling operation. The amount of heat is also stored in the heat storage tank, and a heat storage tank having a large capacity capable of storing 140 to 150 liters of heat storage water at 70 ° C. is required.

  This invention is made paying attention to this point, The objective is providing the bath apparatus which can make the filling condition of a bathtub into a target filling condition, aiming at size reduction of a thermal storage tank. It is in.

In order to achieve this object, the first characteristic configuration of the bath apparatus according to the present invention performs a hot water supply operation for supplying hot water to a bathtub using the heat storage tank storing the heat storage water and the heat storage water of the heat storage tank. In the bath apparatus provided with hot water supply means and operation control means for performing hot water supply operation for operating the hot water supply means to supply hot water so that the hot water filling state of the bathtub becomes the target hot water filling state, the operation control Prior to performing the hot water filling operation, the hot water supply means operates the hot water supply means so that the hot water filling state of the bathtub reaches the hot water filling state before reaching the target hot water filling state. It is comprised so that it may perform a tension operation, It exists in the point which uses the said bathtub as a thermal storage tank in the state which performed the said advance hot water operation before the said hot water operation and completed the said previous hot water operation .

That is, the operation control means first performs the preceding hot water filling operation to set the hot water filling state of the bathtub to the advanced hot water filling state, and then performs the hot water filling operation to set the hot water filling state of the bathtub to the target hot water filling state. be able to. In this way, the amount of heat required to change the hot-water state of the bathtub to the target hot-water state by setting the hot-water state of the bathtub to the previous hot-water state before the hot-water operation is performed. The part can be stored in the bathtub, and the bathtub can be used as a heat storage tank. In the heat storage tank, it is sufficient to store only the amount of heat for changing from the preceding hot water filling state to the target hot water filling state, and the capacity necessary for the heat storage tank can be minimized.
Accordingly, it has become possible to provide a bath apparatus that can change the hot water state of the bathtub to the target hot water state while reducing the size of the heat storage tank.

  The second characteristic configuration of the bath device according to the present invention is that the heat storage water taken out from the heat storage tank is circulated in a circulation path and returned to the heat storage tank, and the heat storage water flowing through the circulation path is thermoelectric. An exhaust heat exchanger that heats the exhaust heat of the cogeneration device with an exhaust heat transfer fluid, and the operation control means stores the exhaust heat of the cogeneration device in the heat storage tank so as to store the heat in the heat storage tank. There exists in the point comprised so that the heat storage driving | operation which operates a combined supply device and the said thermal storage water circulation means may be performed.

  That is, when the operation control means performs the heat storage operation, the heat storage water taken out from the heat storage tank is heated by the exhaust heat exchanger and returned to the heat storage tank, so that the heat storage tank uses the exhaust heat of the combined heat and power supply device. Can store heat. Since the heat stored in the heat storage tank is used to change the hot water filling state of the bathtub to the target hot water filling state, the exhaust heat of the combined heat and power supply device can be effectively used to improve the energy efficiency.

  According to a third characteristic configuration of the bath device according to the present invention, the operation control unit manages the time-series power load and the time-series heat load, and the time-series power load and the time-series heat load are managed. The heat storage operation is performed on the basis of this, and the preceding hot water filling operation is performed before the time zone in which the heat storage operation is predicted to be performed.

That is, the operation control means performs the heat storage operation based on the time-series power load and the time-series heat load, so that the cogeneration device corresponds to the time-series power load and the time-series heat load. It is possible to generate heat and electric power and to effectively use the heat and electric power to improve energy efficiency.
If the amount of heat stored in the heat storage tank is large, the amount of heat stored in the heat storage tank becomes full immediately after performing the heat storage operation, and the amount of heat that can be stored in the heat storage tank by performing the heat storage operation may be small. is there. Therefore, even if the heat storage operation is performed, the exhaust heat of the combined heat and power supply device cannot be sufficiently stored, which is disadvantageous in terms of energy efficiency. In addition, when the heat storage tank has a large amount of heat storage, the heat storage operation is completed when the heat storage capacity of the heat storage tank is full, so the operation time of the heat storage operation is shortened and the operation time of the combined heat and power supply device is shortened. This is also a disadvantage in terms of energy efficiency.
Therefore, the operation control means supplies the hot water to the bathtub using the heat of the heat storage tank and performs the heat storage amount of the heat storage tank by performing the preceding hot water filling operation before the time zone where the heat storage operation is predicted to be performed. The amount of heat stored in the heat storage tank is reduced when performing a subsequent heat storage operation. Therefore, a large amount of heat can be stored in the heat storage tank by performing the heat storage operation, and the operation time of the combined heat and power supply device can be further extended, and further energy efficiency can be improved.

  The 4th characteristic structure of the bath apparatus which concerns on this invention is the point by which the said operation control means is comprised so that it may perform the said thermal storage operation after performing the said hot water filling operation after performing the said hot water filling operation. It is in.

  In other words, the operation control means performs the heat storage operation between the time when the hot water filling operation is performed and the time when the hot water filling operation is performed. The exhaust heat of the apparatus can be stored in the heat storage tank. Therefore, when performing hot water filling operation, a sufficient amount of heat can be stored in the heat storage tank, hot water filling operation can be performed accurately, and hot water such as a shower can be supplied using the remaining heat. It is possible to effectively use the exhaust heat of the combined heat and power supply device while utilizing the heat storage tank.

  According to a fifth characteristic configuration of the bath apparatus according to the present invention, the warm water supply means is configured to heat the heated water by using the heat storage water in the heat storage tank in the heat exchanger for warm water as the warm water supply operation. The hot water supply operation to supply to the bathtub and the reheating operation to heat the bathtub water circulated between the bathtub and the tub by the tub water circulation means in the heat storage water of the heat storage tank in the reheating heat exchanger. It is in the point which is comprised.

That is, when the hot water supply means performs a hot water filling operation, water can be heated to a desired temperature in the hot water heat exchanger and hot water at the desired temperature can be supplied to the bathtub to fill the bathtub. . When the hot water supply means performs a reheating operation, the bathtub water heated by the reheating heat exchanger is returned to the bathtub, thereby heating the bathtub water to a desired temperature and reheating the bathtub water. it can.
When the storage amount is not satisfied with respect to the preceding hot water filling state or the target hot water filling state, the hot water supply means performs the hot water filling operation so that the hot water filling state of the bathtub is changed to the preceding hot water filling state or the target hot water filling state. be able to. When the storage amount is satisfied with respect to the preceding hot water filling state or the target hot water filling state but the temperature is not satisfied, the hot water supply means performs a chasing operation so that the hot water filling state of the bathtub is changed to the preceding hot water filling state. Or it can be set as the target hot water filling state. As described above, the hot water supply means performs the hot water filling operation or the chasing operation according to the state of the bathtub water in the bathtub, thereby ensuring the hot water filling state of the bathtub to each of the preceding hot water filling state and the target hot water filling state. Therefore, it is possible to reliably perform the preceding hot water operation and the hot water operation.

  A sixth characteristic configuration of the bath device according to the present invention is such that the preceding hot water filling state is set such that the temperature of the bath water is lower than the target hot water filling state, and the operation control means includes the preceding hot water filling. In the tensioning operation, the hot water supply means is configured to operate the hot water filling operation and the chasing operation, and in the hot water filling operation, the hot water supply means is configured to act as the chasing operation.

  That is, since the temperature of the bath water is set to be lower than that of the target hot water state, the temperature of the bath water becomes higher when the hot water state of the bathtub becomes the previous hot water state. And the temperature difference between the atmosphere temperature of the bathtub can be minimized. Therefore, the temperature drop of the bath water can be minimized as much as possible until the hot water filling operation is performed after the hot water filling state of the bathtub becomes the preceding hot water filling state, and heat dissipation in the bathtub can be suppressed as much as possible.

An embodiment of a bath apparatus according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1, 3 to 7, and 9 to 11, this bath apparatus circulates a heat storage tank 1 that stores water as the heat storage water A <b> 1 and the heat storage water A <b> 1 taken out from the heat storage tank 1. Heat storage water circulation means 3 that is circulated in the path 2 and returned to the heat storage tank 1 is provided.
1, FIG. 3 to FIG. 7, and FIG. 9 to FIG. 11, the flow state of the fluid is indicated by thick lines and arrows. 1, FIG. 3 to FIG. 7, and FIG. 9 to FIG. 11 show the same configuration with respect to other configurations, except that the portion through which the fluid flows is different.

  In the circulation path 2, an exhaust heat heat exchanger 5 that heats the heat storage water A <b> 1 flowing through the circulation path 2 using an exhaust heat transport fluid that transports exhaust heat of the combined heat and power supply device 4, and the exhaust heat exchanger A heat-dissipating heat exchanger 6 that dissipates the heat storage water A <b> 1 after passing through 5 is provided.

The cogeneration device 4 includes, for example, a gas engine or fuel cell that uses city gas as fuel, so that the cooling water A2 as the exhaust heat carrier fluid recovers exhaust heat from the gas engine or fuel cell. It is configured. A cooling water circulation path 7 for circulating the cooling water A <b> 2 is provided between the exhaust heat exchanger 5 and the combined heat and power supply device 4, and a cooling water circulation pump 8 is provided in the cooling water circulation path 7.
In the cooling water circulation path 7, a cooling water going-out temperature sensor 9 for detecting the temperature of the cooling water A 2 supplied from the combined heat and power supply device 4 to the exhaust heat exchanger 5, and supplied from the combined heat and power supply device 4 to the exhaust heat exchanger 5. A cooling water flow sensor 10 that detects the flow rate of the cooling water A2 and a cooling water return temperature sensor 11 that detects the temperature of the cooling water A2 returned from the exhaust heat exchanger 5 to the combined heat and power supply device 4 are provided.

  The heat storage tank 1 is configured as an open air type having an opening leading to the atmosphere at a position higher than the upper surface of the stored heat storage water A1. Although illustration is omitted, a replenishment path and a replenishment valve are provided for replenishing the heat storage water A1 to the heat storage tank 1, and replenishment is detected when the lower limit water level sensor detects that the water level of the heat storage water A1 is less than the lower limit water level. The valve is opened, and the heat storage water A1 is supplied to the heat storage tank 1 through the supply path. When the upper limit water level sensor detects that the water level of the heat storage water A1 has reached the upper limit water level, the replenishment valve is closed and the replenishment of the heat storage water A1 to the heat storage tank 1 is stopped in the replenishment path.

The circulation path 2 is connected to the upper part and the lower part of the heat storage tank 1, and the heat storage water circulation means 3 is configured to take out the heat storage water A1 from the upper part of the heat storage tank 1 and return the heat storage water A1 to the lower part of the heat storage tank 1. Has been.
An exhaust heat exchanger bypass path 13 is provided for allowing the heat storage water A1 taken out from the heat storage tank 1 to the circulation path 2 to bypass the exhaust heat exchanger 5 and to flow to the heat dissipation heat exchanger 6. This exhaust heat exchanger bypass passage 13 is provided with a bypass passage adjustment valve 18 capable of adjusting whether or not the heat storage water A1 is allowed to flow and its flow rate.

  The heat storage water circulation means 3 includes a heat storage water circulation pump 12 and a bypass passage adjustment valve 18. The heat storage water circulation means 3 has a total flow state (for example, a thick line portion in FIG. 3) in which the heat storage water A1 is circulated in a form in which the entire amount of the heat storage water A1 taken out from the heat storage tank 1 is passed through the exhaust heat exchanger 5. The heat storage water A1 taken out from the heat storage tank 1 can be switched to a partially flowing state (for example, a thick line portion in FIG. 5) in which the heat storage water A1 is circulated in a form in which the heat storage water A1 is passed through the exhaust heat exchanger bypass passage 13. It is configured. That is, the heat storage water circulation means 3 switches to the full flow state by operating the heat storage water circulation pump 12 with the bypass passage adjustment valve 18 closed. Further, the heat storage water circulation means 3 is switched to a partially flowing state by operating the heat storage water circulation pump 12 with the bypass passage adjustment valve 18 opened.

  The exhaust heat exchanger bypass passage 13 is provided with auxiliary heating means 14 capable of performing a heating operation for heating the stored heat storage water A1. The auxiliary heating means 14 is configured to heat the heat storage water A1 by burning the gas burner 15. The fuel gas supply passage 16 for supplying a fuel gas such as city gas to the gas burner 15 is provided with a fuel gas regulating valve 17 capable of adjusting whether or not the fuel gas is supplied to the gas burner 15 and the fuel gas supply amount. Yes. The auxiliary heating means 14 is configured to be able to perform a heating operation by opening the fuel gas regulating valve 17 and burning the gas burner 15.

  The circulation path 2 is connected to the first heat storage water temperature sensor 25 for detecting the temperature of the heat storage water A1 taken out from the heat storage tank 1 and the exhaust heat exchanger bypass path 13 from the upstream side in the flow direction of the heat storage water A1. The 1st heat storage water flow rate which can adjust the flow volume of the heat storage water A1 flowing through the 2nd heat storage water temperature sensor 26 which detects the temperature of the heat storage water A1 flowing through the location, the heat storage water circulation pump 12, and the exhaust heat exchanger 5 The third heat storage for detecting the temperature of the heat storage water A1 after passing through the regulating valve 27, the exhaust heat exchanger 5, the reheating heat exchanger 23 as the heat dissipating heat exchanger 6, and the reheating heat exchanger 23 A water temperature sensor 28, a hot water supply heat exchanger 21 as the heat dissipation heat exchanger 6, a heat storage water flow sensor 29 for detecting the flow rate of the heat storage water A1 passing through the hot water supply heat exchanger 21, and a hot water supply heat exchanger 21 are provided. The second heat storage water flow rate adjustment valve 3 that can adjust the flow rate of the stored heat storage water A1. It is provided.

The hot water supply heat exchanger 21 is configured so that the hot water supply water A3 supplied from the water supply path 19 and supplied to the hot water supply path 20 is a heat dissipation target of the heat storage water A1. The water supply path 19 is provided with a water supply temperature sensor 31 that detects the temperature of the water supplied to the hot water supply heat exchanger 21. In the hot water supply path 20, from the upstream side in the flow direction of the hot water supply water A3, the flow rate of the hot water supply water A3 passing through the hot water supply heat exchanger 21 can be adjusted, the hot water supply flow rate adjustment valve 32, and the hot water supply heat exchange. An outlet temperature sensor 33 that detects the temperature of the hot water supply water A3 after passing through the water heater 21, a hot water supply sensor 34 that detects the amount of hot water supplied through the hot water supply channel 20, and a hot water supply temperature that supplies hot water through the hot water supply channel 20 A hot water supply temperature sensor 35 is provided.
Further, a hot water supply bypass path 36 for supplying hot water supply water A3 from the water supply path 19 to the hot water supply path 20 by bypassing the hot water supply heat exchanger 21 is provided, and the water supply A3 flowing through the hot water supply bypass path 36 is provided. A bypass flow rate adjustment valve 37 is provided which can adjust the flow rate.
In this way, the hot water supply water A3 heated by the hot water supply heat exchanger 21 and the hot water supply water A3 from the hot water supply bypass passage 26 are mixed to supply hot water in the hot water supply passage 20. ing.

The reheating heat exchanger 23 is provided in series with the hot water supply heat exchanger 21 so that the heat storage water A1 after passing through the reheating heat exchanger 23 flows to the hot water supply heat exchanger 21. Yes. The reheating heat exchanger 23 is configured so that the bathtub water A4 is a heat dissipation target of the heat storage water A1 between the bathtub 22 and the heat exchanger 23.
A bathtub water circulation path 38 that circulates the bathtub water A4 between the bathtub 22 and the reheating heat exchanger 23 is provided. In this bathtub water circulation path 38, a water level sensor 52 for detecting the amount of stored bathtub water A4, a bathtub water temperature sensor 39 for detecting the temperature of bathtub water A4 supplied from the bathtub 22 to the reheating heat exchanger 23, and A bathtub water circulation pump 40 is provided.
A hot water supply passage 50 that branches from the hot water supply passage 20 and supplies hot water to the bathtub 22 is provided. The hot water filling path 50 is connected to the bathtub water circulation path 38 and is provided to supply hot water to the bathtub 22 using the bathtub water circulation path 38. The hot water filling path 50 is provided with a hot water filling valve 51 for intermittently supplying hot water to the bathtub 22.

A hot water supply means 49 for performing a hot water supply operation for supplying hot water to the bathtub 22 using the heat storage water A1 of the heat storage tank 1 is provided. The hot water supply means 49 includes a hot water supply heat exchanger 21, a water supply path 19, a hot water supply path 20, a hot water supply path 50, a reheating heat exchanger 23, a bathtub water circulation path 38, a bathtub water circulation pump 40, and the like. . The hot water heat exchanger 21 corresponds to a hot water heat exchanger. The bathtub water circulation path 38 and the bathtub water circulation pump 40 correspond to the bathtub water circulation means.
The hot water supply means 49 performs a hot water supply operation of supplying hot water to the bathtub 22 using the heat storage water A1 of the heat storage tank 1. The hot water supply means 49 is a hot water supply operation in which the hot water supply heat exchanger 21 heats the water supply A3 with the heat storage water A1 of the heat storage tank 1 and supplies the heated water supply A3 to the bathtub 22 (for example, FIG. 3), and in the heat exchanger 23 for reheating, the bathtub water A4 circulated between the bathtub 22 by the bathtub water circulation path 38 and the bathtub water circulation pump 40 is heated by the heat storage water A1 of the heat storage tank 1. It is configured to perform a chasing operation (for example, a thick line portion in FIG. 4).

In the hot water filling operation, the hot water supply means 49 opens the hot water filling valve 51, whereby the hot water supply heat exchanger 21 supplies the hot water A3 heated by the heat storage water A1 from the hot water supply passage 20 to the hot water filling passage 50, and bath water circulation. It is made to flow in order of the path 38 and to supply to the bathtub 22.
In the reheating operation, the hot water supply means 49 operates the bathtub water circulation pump 40 to circulate the bathtub water A4 between the bathtub 22 and the reheating heat exchanger 23 in the bathtub water circulation path 38. The bathtub water A4 heated by the heat storage water A1 in the heat exchanger 23 is supplied to the bathtub 22.

In addition to the hot water supply heat exchanger 21 and the reheating heat exchanger 23, the heat dissipation heat exchanger 6 is provided with a heating radiator 24 that radiates the indoor air in the heating target space. The heating radiator 24 is, for example, a floor heating panel, and a bathroom heating device or the like is also applicable.
The heating radiator 24 is provided in parallel with the hot water supply heat exchanger 21 and the reheating heat exchanger 23. That is, the heating passage 41 is provided in parallel with the portion of the circulation path 2 where the hot water supply heat exchanger 21 and the reheating heat exchanger 23 are provided, and the heating passage 41 is connected to the heating passage 41. A radiator 24 is provided. The heating flow passage 41 is provided so as to branch from the middle portion of the exhaust heat exchanger bypass passage 13 and join the circulation passage 2, and also serves as a part of the exhaust heat exchanger bypass passage 13. .
In the heating flow path 41, the heating forward temperature sensor 42 that detects the temperature of the heat storage water A <b> 1 supplied to the heating radiator 24 from the upstream side in the flow direction of the heat storage water A <b> 1, and the heat storage in the heating radiator 24. There are provided a thermal valve 43 that can adjust whether or not to supply water A1, and a heating check valve 44 that prevents the backflow of the heat storage water A1.

  In the circulation path 2, a heat storage tank bypass path 45 is provided that connects a return portion 2 a that returns the heat storage water A <b> 1 to the lower portion of the heat storage tank 1 and an extraction portion 2 b that extracts the heat storage water A <b> 1 from the upper portion of the heat storage tank 1. In the heat storage tank bypass passage 45, a bypass temperature sensor 46 that detects the temperature of the heat storage water A1 that flows therethrough, and a heat storage water return adjustment that can adjust whether the heat storage water A1 flows through the heat storage tank bypass passage 45 are adjustable. A valve 47 is provided. And it is comprised so that at least one part of the thermal storage water A1 after passing the heat exchanger 6 for thermal radiation may be flowed through the thermal storage tank bypass path 45 by opening the thermal storage water return adjustment valve 47.

  An operation control device 48 is provided as an operation control means for controlling the operation of the bath device. The operation control device 48 is configured to perform a heat storage operation in which the heat and power supply device 4 and the heat storage water circulation means 3 are operated so as to store the exhaust heat of the heat and power supply device 4 conveyed by the cooling water A2 in the heat storage tank 1. ing. The operation control device 48 is configured to manage a time-series power load and a time-series heat load, and perform a heat storage operation based on the time-series power load and the time-series heat load. The operation control device 48 is configured to perform the heat storage operation by operating the combined heat and power supply device 4 according to the currently requested power load.

For the management of the time-series power load and the time-series heat load, the operation control device 48, for example, as shown in FIG. 2, the power load and the heat load for each time period (every hour) of the day. The time-series power load and the time-series heat load are managed in the state divided into two. The operation control device 48 uses the power load and heat load of each time zone (every hour) that is actually used, and the power of each time zone (every hour) that is already stored. The load and the heat load are updated, and the power load and the heat load in each time zone (every hour) of the day are learned.
Regarding the power load, for example, the operation control device 48 is provided in the output value of the inverter that outputs the power of the combined heat and power supply device 4 and a commercial power supply line connected to the power load of a television, a refrigerator, a washing machine, or the like. The actually used power load can be obtained based on the measured information of the power measuring means.
The heat load is the sum of the hot water supply heat load used as the hot water supply from the hot water supply passage 20, the reheating heat load used for reheating the bath water A4, and the heating heat load used in the radiator 24 for heating. Is. As for the thermal load, for example, the operation control device 48 can obtain the hot water supply thermal load from the detection information of the hot water supply amount sensor 34 and the hot water supply temperature sensor 35, and the detection information of the bathtub water temperature sensor 39 and the bathtub water circulation pump. The reheating heat load can be obtained from the operation state of 40, and the heating heat load can be obtained from the detection information of the heating temperature sensor 39 and the operation state of the heat storage water circulation pump 8.

(Heat storage operation)
The heat storage operation will be described with reference to FIG.
The operation control device 48 is configured to operate the combined heat and power supply device 4 and the cooling water circulation pump 8 so that the cooling water A2 flows through the exhaust heat heat exchanger 5. The operation control device 48 activates the heat storage water circulation pump 8 with the first heat storage water flow rate adjustment valve 27 and the second heat storage water flow rate adjustment valve 30 opened and the bypass passage adjustment valve 18 closed. The water circulation means 3 is configured to operate in a full flow state. The operation control device 48 adjusts the opening degree of the first heat storage water flow rate adjustment valve 27 so that the detected temperature of the cooling water return temperature sensor 11 falls within the set temperature range, and passes it to the exhaust heat exchanger 5. The heat storage water flow rate adjustment control for adjusting the flow rate of the heat storage water A1 is performed.
In this way, the entire amount of the heat storage water A1 taken out from the upper part of the heat storage tank 1 is heated by the exhaust heat exchanger 5 and returned to the lower part of the heat storage tank 1. With the heated heat storage water A1, the temperature of the heat storage water A1 stored in the heat storage tank 1 is entirely increased and stored in the heat storage tank 1.

  As shown in FIGS. 3 and 4, the operation control device 48 stores the exhaust heat of the combined heat and power supply device 4 in the heat storage tank 1 by performing the heat storage operation. The stored hot water circulating means 3 and the hot water supply means 49 are operated to supply hot water so that the hot water state of the bathtub 22 becomes the target hot water state using the heat stored in the hot water. In other words, the operation control device 48 performs a hot water operation in which the hot water supply means 49 is operated and the hot water supply means 49 is operated so that the hot water supply state of the bathtub 22 becomes the target hot water state. Prior to performing the operation, the hot water supply means 49 is configured to perform the hot water supply operation in which the hot water supply means 49 is operated to supply the hot water so that the hot water supply state of the bathtub becomes the advanced hot water state before reaching the target hot water state. ing.

The target hot water filling state and the preceding hot water filling state are determined from the temperature and the storage amount. The target hot water temperature is defined as a state where hot water at a hot water set temperature (for example, 42 ° C.) is stored in a bathtub in a hot water set amount (for example, about 180 liters). In the preceding hot water filling state, the storage amount of the bathtub water A4 is the same amount (for example, 180 liters) with respect to the target hot water filling state, and the temperature of the bathtub water A4 is lower than that in the target hot water filling state ( For example, the temperature is set to 35 ° C. The preceding hot water filling set temperature is set to 20 to 35 ° C., for example.
In the preceding hot water filling state, the storage amount of the bath water A4 may be a storage amount within an allowable range necessary for bathing with respect to the target hot water filling state, and the storage amount of the bath water A4 is compared with the target hot water filling state. It is not limited to the same amount. By setting the storage amount of bathtub water A4 within the allowable range necessary for bathing to the same amount or the target hot water condition with respect to the target hot water condition, By doing so, the amount of hot water required for bathing can be secured. Therefore, the operation control device 48 may simply operate the hot water supply means 49 in the hot water operation, and can simplify the control configuration. Moreover, in the hot water filling operation, the temperature of the bath water A4 may be increased so as to satisfy the target hot water filling state from the preceding hot water filling state, so that the amount of heat necessary for performing the hot water filling operation can be reduced as much as possible, This is also effective when the tank 1 is downsized.

  The operation control device 48 first performs the preceding hot water filling operation to set the hot water filling state of the bathtub 22 to the preceding hot water filling state, and then performs the hot water filling operation to change the hot water filling state of the bathtub 22 to the target hot water filling state. can do. In this way, the amount of heat necessary for setting the hot water state of the bathtub 22 to the target hot water state by setting the hot water state of the bathtub 22 to the prior hot water state before the hot water operation is performed. Can be stored in a bathtub, and the bathtub 22 can be used as a heat storage tank.

The preceding hot water filling operation and hot water filling operation will be described with reference to FIGS.
(Advanced hot water operation)
The operation control device 48 causes the hot water supply means 49 to perform a hot water filling operation (for example, a thick line portion in FIG. 3) and a chasing operation (for example, the thick line portion in FIG. 4) in the preceding hot water filling operation, and in the hot water filling operation. The hot water supply means 49 is configured to follow up (for example, the thick line portion in FIG. 4).
In the preceding hot water filling operation, the operation control device 48 activates the hot water supply means 49 (for example, a thick line portion in FIG. 3) when the storage amount is less than the previous hot water filling state, Thus, when the storage amount is satisfied but the temperature is not satisfied, the warm water supply means 49 is configured to follow up (for example, the thick line portion in FIG. 4).

3 and 4 show the preceding hot water filling operation in a state where the cogeneration apparatus 4 is not operated.
FIG. 3 shows a case where the hot water supply means 49 is operated with hot water.
The operation control device 48 operates the regenerator water circulation means 3 in the full flow state, and the regenerator water flow rate sensor 29 so that the detected temperature of the outlet temperature sensor 33 becomes the preceding hot water set temperature (for example, 35 ° C.) + Α. The heat storage water flow rate control for the hot water supply temperature for the bath is adjusted to adjust the opening degree of the second heat storage water flow rate adjustment valve 30 based on the detected flow rate. The operation control device 48 uses the hot water supply flow rate adjustment valve 32 and the hot water supply flow rate adjustment valve 32 so that the detected flow rate of the hot water supply amount sensor 34 becomes the required flow rate and the detected temperature of the hot water supply temperature sensor 35 becomes the preset hot water filling temperature (for example, 35 ° C.). The bath water supply control for adjusting the opening degree of the bypass flow rate adjustment valve 37 is performed. The operation control device 48 opens the hot water filling valve 51, so that hot water having a preset hot water filling set temperature (for example, 35 ° C.) heated by the hot water supply heat exchanger 21 is supplied from the hot water supply passage 20 to the hot water filling passage 50, The bath water circulation path 38 is passed through in order and supplied to the bathtub 22. Based on the detection information of the water level sensor 52, the operation control device 48 assumes that the hot water filling state of the bathtub 22 has changed to the preceding hot water filling state when the storage amount of the bathtub water A4 becomes the hot water filling set amount. Is closed and the heat storage water circulating means 3 is deactivated to terminate the preceding hot water filling operation.

FIG. 4 shows a case where the hot water supply means 49 is operated for chasing.
The operation control device 48 operates the heat storage water circulation means 3 in a full flow state and operates the bathtub water circulation pump 40 to circulate the bathtub water A4 between the bathtub 22 and the reheating heat exchanger 23. In the reheating heat exchanger 23, the bathtub water A4 is heated with the heat storage water A1 and the heated bathtub water A4 is returned to the bathtub 22. When the temperature detected by the bath water temperature sensor 39 reaches a preset hot water filling temperature (for example, 35 ° C.), the operation control device 48 assumes that the hot water filling state of the bathtub 22 has changed to the hot water filling state, and the stored heat water circulating means 3 and the bathtub. The water circulation pump 40 is stopped and the preceding hot water filling operation is terminated.

  Based on FIGS. 5-7, the preceding hot water filling operation in the state which is operating the cogeneration apparatus 4 is demonstrated. 5 to 7 show a case where the hot water supply means 49 is operated to fill with hot water. When the hot water supply means 49 is operated for chasing, the only difference is whether the hot water supply means 49 is operated for hot water filling or chasing.

FIG. 5 shows a case where the temperature detected by the first heat storage water temperature sensor 25 is higher than the first set temperature (for example, 60 ° C.).
The operation control device 48 operates the cooling water circulation pump 8 to flow the cooling water A2 through the exhaust heat exchanger 5, and the first temperature so that the temperature detected by the cooling water return temperature sensor 11 falls within the set temperature range. The heat storage water flow rate adjustment valve 27 is configured to perform heat storage water flow rate adjustment control for adjusting the opening degree. Further, similarly to the case shown in FIG. 3, the operation control device 48 is configured to perform the hot water storage temperature flow rate control for bath hot water temperature and the bath hot water control.
For the heat storage water circulation means 3, when the detected flow rate of the heat storage water flow sensor 29 satisfies the flow rate required by the hot water supply heat exchanger 21, the operation control device 48 switches the heat storage water circulation means 3 to the full flow state, When the detected flow rate of the heat storage water flow sensor 29 is less than the flow rate required by the hot water supply heat exchanger 21, the operation control device 48 opens the bypass passage adjustment valve 18 and partially passes the heat storage water circulation means 3. It is configured to switch to a flow state. FIG. 5 shows a case where the heat storage water circulating means 3 is partially switched to the flow state.

FIG. 6 shows a case where the temperature detected by the first heat storage water temperature sensor 25 is equal to or higher than a second set temperature (for example, 75 ° C.) higher than the first set temperature.
The operation control device 48 operates the regenerative water circulation means 3 in a full flow state, operates the cooling water circulation pump 8 to cause the exhaust heat heat exchanger 5 to flow the cooling water A2, and controls the flow rate of stored heat water. Is configured to do. In addition, the operation control device 48 is configured to perform heat storage water flow rate control for bath hot water temperature and bath hot water control.
In this case, since the detected temperature of the first heat storage water temperature sensor 25 is equal to or higher than the second set temperature (for example, 75 ° C.), even if the heat storage water flow rate adjustment control is performed, the detection temperature of the cooling water return temperature sensor 11 May become higher than the set temperature range. Therefore, the operation control device 48 opens the heat storage water return adjustment valve 47 and mixes the low-temperature heat storage water A1 from the heat storage tank bypass passage 45 with the high-temperature heat storage water A1 taken out from the upper part of the heat storage tank 1. It is comprised so that the temperature of the thermal storage water A1 flowing through the exhaust heat exchanger 5 may be lowered.

FIG. 7 shows a case where the temperature detected by the first heat storage water temperature sensor 25 is equal to or lower than a first set temperature (for example, 60 ° C.).
The operation control device 48 opens each of the first heat storage water flow rate adjustment valve 27, the second heat storage water flow rate adjustment valve 30, and the bypass passage adjustment valve 18 to switch the heat storage water circulation means 3 to a partially flowing state. The cooling water circulation pump 8 is operated to cause the exhaust heat exchanger 5 to flow the cooling water A2, and the heat storage water flow rate adjustment control is performed. Then, the operation control device 48 is configured to open the fuel gas adjustment valve 18 and heat the auxiliary heating means 14. In addition, the operation control device 48 is configured to perform heat storage water flow rate control for bath hot water temperature and bath hot water control.

(Hot water operation)
As shown in FIG. 4, the operation control device 48 operates the heat storage water circulation means 3 in a full flow state, and operates the bathtub water circulation pump 40, whereby the bathtub 22 and the reheating heat exchanger 23 are connected. The bath water A4 is circulated between the two, and the bath water A4 is heated by the heat storage water A1 in the reheating heat exchanger 23, and the heated bath water A4 is returned to the bathtub 22. As described above, the operation control device 48 is configured to perform the hot water filling operation by chasing the hot water supply means 49. When the detected temperature of the bathtub water temperature sensor 39 reaches the hot water filling set temperature (for example, 42 ° C.), the operation controller 48 stops the hot water filling operation by stopping the heat storage water circulation means 3 and the bath water circulation pump 40.

  In FIG. 4, the hot water filling operation in a state where the combined heat and power supply device 4 is not operated is shown, but the hot water filling operation can be performed in a state where the combined heat and power supply device 4 is operated. That is, in FIG. 5 to FIG. 7, the hot water supply unit 49 is operated to fill with water, but in FIG. 5 to FIG. 7, the hot water supply unit 49 is operated to perform the chasing operation (thick line portion in FIG. 4). .

As described above, when the hot water filling state of the bathtub 22 is changed to the target hot water filling state, the operation control device 48 first performs the hot water filling operation and then performs the hot water filling operation. The timing will be described.
The operation control device 48 is configured to perform the preceding hot water filling operation before the time zone in which the heat storage operation is predicted to be performed.

Since the operation control device 48 manages a daily time-series power load (for example, FIG. 2) and operates the heat and power cogeneration device 4 according to the currently requested power load, the heat storage operation is performed. A time zone with a large time-series power load can be predicted as a time zone in which the heat storage operation is performed. On the other hand, since it is the bathing time zone in which the thermal load is increased to set the hot water filled state of the bathtub 22 to the target hot water filled state, the operation control device 48 manages the time-series thermal load (for example, the day) From FIG. 2), the bathing time zone can be predicted. Therefore, the operation control device 48 is configured to perform the preceding hot water filling operation in a time zone before the predicted bathing time zone and a time zone in which a time-series increase in power load can be expected thereafter.
For example, in FIG. 2, since the heat load becomes large at 20 to 21 o'clock, it can be predicted that 20 to 21:00 is a bathing time zone. And since the electric power load is increasing after 17:00, the operation control apparatus 48 is made to perform a preceding hot water filling operation from 17:00.

  In addition, the operation control device 48 is configured to perform a heat storage operation during a period from the preceding hot water filling operation to the hot water filling operation. Therefore, the exhaust heat of the combined heat and power supply device 4 can be stored in the heat storage tank during the period from the preceding hot water filling operation to the hot water filling operation. And when performing hot water filling operation, sufficient heat can be stored in the heat storage tank 1, hot water filling operation can be performed accurately, and hot water such as a shower can be supplied using surplus heat. Is also possible.

  In this way, when the hot water filling state of the bathtub 22 is changed to the target hot water filling state, the operation control device 48 increases the time-series power load in a time zone before the predicted bathing time zone and thereafter. A preceding hot water filling operation is performed in a predictable time zone, and the hot water filling operation is completed while the preceding hot water filling operation is terminated. The operation control device 48 is configured to continue the heat storage operation until the bather actually takes a bath and gives a bathing instruction, and when the bathing instruction is issued, the hot water filling operation is performed.

The effect of the bath apparatus according to the present invention will be described based on the experimental results of FIG.
FIG. 8 shows the temperature of the bath water when the heat storage operation is performed after the completion of the heat storage operation, the preceding hot water filling operation and the hot water filling operation, and before the hot water filling operation is performed. A change between the detected temperature of the sensor 39 (solid line in the figure) and the detected temperature of the first heat storage water temperature sensor 25 (dotted line in the figure) is shown. In the preceding hot water filling operation, the hot water supply means 49 is hot watered so that 180 liters of 35 ° C. hot water is supplied to the bathtub 22. The heat storage operation is performed for about 2 hours with the load of the exhaust heat exchanger 5 being about 3 kW. The hot water filling operation is performed for about 7 minutes so that the temperature detected by the bathtub water temperature sensor 39 (solid line in the figure) is 35 ° C. to 42 ° C. Incidentally, in this hot water filling operation, the opening degree of the second heat storage water flow rate adjustment valve 30 is adjusted so that the temperature of the heat storage water A1 returned to the lower part of the heat storage tank 1 is 43 to 48 ° C.

As shown in FIG. 8, the temperature detected by the bath water temperature sensor 39 (solid line in the figure) hardly changes at 35 ° C. until the hot water filling operation is performed after the hot water filling operation is performed. It was found that the hot water supplied to the bathtub 2 was hardly dissipated until the hot water filling operation was performed. Therefore, the bathtub 22 can be effectively used as a heat storage tank by performing the preceding hot water filling operation.
Immediately after the hot water filling operation, a hot water supply operation to be described later for supplying hot water from the hot water supply passage 20 at a hot water supply set temperature of 43 ° C. was performed. Since the detected temperature (dotted line in the figure) of the first heat storage water temperature sensor 25 is secured for about 10 minutes until the temperature becomes 48 degrees or less, the hot water supply operation in which the hot water supply set temperature is 43 ° C. immediately after the hot water filling operation is performed. It was found that can be performed for about 10 minutes. Therefore, immediately after performing the hot water filling operation, hot water such as a shower can be supplied using the heat storage water A1 of the heat storage tank 1.

  The operation control device 48 is a hot water supply that supplies water from the hot water supply path 20 using the heat storage water A1 of the heat storage tank 1 in addition to the preceding hot water filling operation and the hot water filling operation as an operation of radiating heat using the heat storage water A1 of the heat storage tank 1. It is comprised so that the heating operation which radiates heat in the heat radiator 24 using the operation | movement and the thermal storage water A1 of the thermal storage tank 1 may be performed.

(Hot water operation)
The hot water supply operation will be described based on FIG.
The operation control device 48 switches the heat storage water circulation means 3 to the full flow state, and the second heat storage based on the detection flow rate of the heat storage water flow rate sensor 29 so that the detection temperature of the outlet temperature sensor 33 becomes the hot water supply set temperature + α. The hot water storage temperature heat storage water flow rate control for adjusting the opening degree of the water flow rate adjustment valve 30 is performed. Further, the operation control device 48 includes the hot water supply flow rate adjustment valve 32 and the bypass flow rate adjustment valve so that the detected flow rate of the hot water supply amount sensor 34 becomes the required hot water supply amount and the detected temperature of the hot water supply temperature sensor 35 becomes the hot water supply set temperature. The hot water supply control for adjusting the opening degree of 37 is performed.
Although FIG. 9 shows the hot water supply operation in a state where the combined heat and power supply device 4 is not operated, hot water supply is performed when the combined heat and power supply device 4 is operated as in the preceding hot water filling operation and the hot water filling operation. You can also drive.

(Heating operation)
The heating operation will be described based on FIGS. 10 and 11.
FIG. 10 shows a case where the combined heat and power supply device 4 is operated to perform the heating operation when the temperature detected by the first heat storage water temperature sensor 25 is equal to or higher than the heat storage water set temperature for heating (for example, 60 ° C.).
The operation control device 48 opens the first heat storage water flow rate adjustment valve 27 and closes each of the second heat storage water flow rate adjustment valve 30 and the bypass path adjustment valve 18 to bring the heat storage water circulation means 3 into a full flow state. The cooling water circulation pump 8 is switched and the exhaust heat exchanger 5 is caused to flow the cooling water A2, and the heat storage water flow rate adjustment control is performed. At this time, since the second heat storage water flow rate adjustment valve 30 is closed, the heat storage water A1 after passing through the exhaust heat exchanger 5 is passed through the exhaust heat exchanger bypass 13 and then heated. It flows through the flow path 41 and flows to the heating radiator 24. In this case, since the detection temperature of the first heat storage water temperature sensor 25 is equal to or higher than the heat storage water set temperature for heating (for example, 60 ° C.), even if the heat storage water flow rate adjustment control is performed, the detection of the cooling water return temperature sensor 11 is performed. The temperature may become higher than the set temperature range. Therefore, the operation control device 48 opens the heat storage water return adjustment valve 47 to operate the heat storage tank bypass passage flow means, and adds the heat storage tank bypass passage to the high-temperature heat storage water A1 taken out from the upper portion of the heat storage tank 1. The low-temperature heat storage water A1 from 45 is mixed and the temperature of the heat storage water A1 flowing through the exhaust heat exchanger 5 is lowered.

  The operation control device 48 opens the thermal valve 43 and continues the flow state in which the heat storage water A1 flows through the heating radiator 24 for a set valve opening time (for example, 3 minutes), and then the thermal valve 43. Is closed for a set valve closing time (for example, 17 minutes) at a set cycle (for example, 20 minutes). It is configured to repeat. Then, when the operation control device 48 continues the flow stop state for a set valve closing time (for example, 17 minutes), as shown in FIG. The heat storage water A <b> 1 after passing through the exhaust heat exchanger 5 is returned to the lower part of the heat storage tank 1 to store heat in the heat storage tank 1. In this way, since the heat storage operation can be intermittently performed while performing the heating operation by effectively utilizing the exhaust heat of the combined heat and power supply device 4, energy saving can be achieved.

FIG. 11 shows a case where the combined heat and power supply device 4 is operated to perform the heating operation when the temperature detected by the first heat storage water temperature sensor 25 is lower than the heat storage water set temperature for heating (for example, 60 ° C.).
As described with reference to FIG. 10, the operation control device 48 opens the first heat storage water flow rate adjustment valve 27 and closes each of the second heat storage water flow rate adjustment valve 30 and the bypass passage adjustment valve 18. Then, the heat storage water circulation means 3 is switched to the full flow state, the cooling water circulation pump 8 is operated, the cooling water A2 is passed through the exhaust heat exchanger 5, and the heat storage water flow rate adjustment control is performed. . In this case, since the temperature detected by the first heat storage water temperature sensor 25 is lower than the heating heat storage water set temperature (for example, 70 ° C.), the temperature detected by the heating forward temperature sensor 42 is the heating set temperature (for example, 60 ° C.). ) May not be met. Therefore, the operation control device 48 opens the heat storage water return adjustment valve 47 to operate the heat storage tank bypass passage flow means, and supplies the heat storage tank bypass passage to the low-temperature heat storage water A1 taken out from the upper portion of the heat storage tank 1. The high-temperature heat storage water A1 from 45 is mixed and the temperature of the heat storage water A1 flowing through the exhaust heat exchanger 5 is increased. Further, the operation control device 48 opens the bypass passage adjusting valve 18 and recirculates the heat storage water when the detected temperature of the heating forward temperature sensor 42 does not reach the heating set temperature (for example, 60 ° C.) even after performing this flow operation. While the means 3 is partially switched to the flow state, the fuel gas regulating valve 18 is opened to heat the auxiliary heating means 14.

  In this case as well, as described with reference to FIG. 10, the operation control device 48 continues the flow state for a set valve opening time (for example, 3 minutes), and then sets the flow stop state for a set valve closing time (for example, , 17 minutes) is repeatedly performed at a set cycle (for example, 20 minutes). Then, when the operation control device 48 continues the flow stop state for a set valve closing time (for example, 17 minutes), as shown in FIG. The heat storage water A <b> 1 after passing through the exhaust heat exchanger 5 is returned to the lower part of the heat storage tank 1 to store heat in the heat storage tank 1.

[Another embodiment]
(1) In the above embodiment, the operation control device 48 performs the heat storage operation so that the exhaust heat of the combined heat and power supply device 4 is stored in the heat storage tank 1, but heat other than the combined heat and power supply device 4 is stored in the heat storage tank. 1 can also be stored.

(2) In the above embodiment, the operation control device 48 performs the heat storage operation based on the time-series power load and the time-series heat load, but at what timing the heat storage operation is performed. Can be changed as appropriate.

(3) In the above embodiment, the operation control device 48 is configured to perform the pre-filling operation before the time zone in which the heat storage operation is predicted to be performed. For example, when the user sets the bathing time. The preceding hot water filling operation can be performed in a time zone that is a set time before the bathing time, and the timing of the hot water filling operation can be appropriately changed.

(4) In the above-described embodiment, the amount of storage of the bathtub water A4 is the same as that of the target hot water condition, and the temperature of the bathtub water A4 is lower than that of the target hot water condition. Although it is set, for example, the storage amount of the bathtub water A4 can be set to a small amount with respect to the target hot water condition, and the temperature of the bathtub water A4 can be set to be low with respect to the target hot water condition. How to set the temperature and the storage amount in the hot water filling state can be appropriately changed.
Moreover, about a prior hot water filling state, it is not possible to make it changeable according to the heat storage amount of the heat storage tank 1, for example instead of setting it as fixed temperature and storage amount. That is, the heat stored in the heat storage tank 1 can be stored in the bathtub 22 as much as possible by setting the running hot water state to a higher temperature and a larger amount of storage as the amount of heat stored in the heat storage tank 1 is larger. The bathtub 22 can be used effectively as a heat storage tank.

(5) In the above embodiment, the hot water supply heat exchanger 21 and the reheating heat exchanger 23 are provided in series, but the hot water supply heat exchanger 21 and the reheating heat exchanger 23 are in parallel. Can also be provided.

  The present invention operates a hot water supply means for performing a hot water supply operation for supplying hot water to a bathtub using heat storage water in a heat storage tank, and operates the hot water supply means so that the hot water filling state of the bathtub becomes a target hot water filling state. An operation control means for performing a hot water filling operation is provided, and can be applied to various bath apparatuses that can make the hot water filling state of the bathtub into the target hot water filling state while reducing the size of the heat storage tank.

The figure which shows the state of the bath apparatus in heat storage operation Diagram showing time-series heat load and time-series power load The figure which shows the state of the bath apparatus in prior hot water operation The figure which shows the state of the bath apparatus in prior hot water filling operation and hot water filling operation The figure which shows the state of the bath apparatus in prior hot water operation The figure which shows the state of the bath apparatus in prior hot water operation The figure which shows the state of the bath apparatus in prior hot water operation The graph which shows the experimental result of the bath apparatus which concerns on this invention The figure which shows the state of the bath apparatus in hot water supply operation The figure which shows the state of the bath device in heating operation The figure which shows the state of the bath device in heating operation

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat storage tank 2 Circulation path 3 Heat storage water circulation means 5 Waste heat exchanger 21 Heat exchanger for hot water (heat exchanger for hot water supply)
23 Heat exchanger for reheating 22 Bathtub 38 Bath water circulation means (tub water circulation path)
40 Bath water circulation means (tub water circulation pump)
48 Operation control device 49 Hot water supply means A1 Heat storage water A3 Water supply A4 Bath water

Claims (6)

A thermal storage tank for storing thermal storage water, hot water supply means for performing hot water supply operation for supplying hot water to the bathtub using the thermal storage water of the thermal storage tank, and the hot water filling state of the bathtub is the target hot water filling state A bath apparatus provided with operation control means for performing a hot water filling operation for operating the hot water supply means with hot water supply,
The operation control means operates the hot water supply means to perform the hot water supply operation so that the hot water filling state of the bathtub is in a prior hot water filling state before reaching the target hot water filling state prior to performing the hot water filling operation. Configured to perform a pre-filling operation ,
A bath apparatus that performs the preceding hot water filling operation prior to the hot water filling operation and uses the bathtub as a heat storage tank in a state where the preceding hot water filling is completed. The heat storage water circulating means for circulating the heat storage water taken out from the heat storage tank and returning it to the heat storage tank, and the heat storage water flowing through the circulation path to the exhaust heat transport fluid for transporting the exhaust heat of the combined heat and power supply device And an exhaust heat exchanger that heats
The said operation control means is comprised so that the heat storage operation which operates the said heat / electricity supply apparatus and the said thermal storage water circulation means may be comprised so that the waste heat of the said heat / electricity supply apparatus may be stored in the said thermal storage tank. Bath equipment.   The operation control means manages a time-series power load and a time-series heat load, performs the heat storage operation based on the time-series power load and the time-series heat load, and performs the heat storage operation. The bath apparatus according to claim 2, wherein the preceding hot water filling operation is performed before a time period predicted to be performed.   The bath apparatus according to claim 2 or 3, wherein the operation control means is configured to perform the heat storage operation after performing the preceding hot water filling operation until the hot water filling operation is performed.   The hot water supply means, as the hot water supply operation, a hot water filling operation for heating the water supply with the heat storage water of the heat storage tank in the heat exchanger for hot water and supplying the heated water supply to the bathtub, and for reheating Any one of Claims 1-4 comprised so that the reheating operation | movement which heats the bathtub water circulated between the said bathtubs with the thermal storage water of the said thermal storage tank in a heat exchanger may be performed. The bath apparatus according to item. The preceding hot water filling state is set so that the temperature of the bathtub water is lower than the target hot water filling state,
In the preceding hot water filling operation, the operation control means causes the hot water supply means to perform the hot water filling operation and the chasing operation, and in the hot water filling operation, the hot water supply means is caused to act as the chasing operation. The bath apparatus according to claim 5, which is configured as follows.

Images