JP2003074969A - Hot-water storage type hot-water supplier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of a device by a method wherein the storage amount of hot-water in a hot-water storage tank will not become short with respect to an amount required actually and an excessive hot-water storage is prevented. SOLUTION: An operation control means H carries out remaining hot-water judging treatment based on the detecting information of remaining hot-water detecting means 25, 26. When the remaining hot-water does not exist, ordinary hot-water storage treatment for starting the operation of a heating means 3 is carried out at the ordinary operation starting time so that the hot-water storage amount in the tank 1 will become a set hot-water filling amount at the set time of hot-water filling. When the remaining hot-water exists, a necessary hot-water filling amount, smaller than the set hot-water filling amount, is obtained based on the detecting information of the remaining hot-water detecting means 25, 26 and the remaining hot-water storage treatment for starting the operation of the heating means 3 is carried out at the remaining hot-water operation starting time so that the hot-water storage amount in the tank 1 will become the necessary hot-water filling amount at the set time of hot-water filling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage tank having a hot water supply path connected to an upper part and a water supply path connected to a lower part, heating means for heating hot water in the hot water storage tank, and operation of the heating means. The present invention relates to a hot water storage type hot water supply device provided with operation control means for controlling the hot water.

[0002]

2. Description of the Related Art In the hot water storage type hot water supply apparatus as described above, it is necessary to operate the heating means in the hot water storage tank while improving the efficiency by using a heat pump or a device utilizing exhaust heat as the heating means. It stores only the amount of hot water that is stored and supplies the hot water that has been stored to hot water taps and bathtubs. For example, the amount of hot water stored in the hot water storage tank is set as the required amount of hot water at the set time set by the user using a remote control or the like. The operation time of the heating means is calculated to be the operation start time which is earlier than the set time by the operation time of the heating means, and the operation of the heating means is started at the operation start time ( For example, Japanese Patent Laid-Open No. 57-12252).

Further, in the hot water supply apparatus of the hot water storage type as described above, the required hot water storage amount to be stored in the hot water storage tank can be changed, and one day, one week, one year, etc. are set as a reference cycle.
When the day is set as the reference cycle, the morning time period and the night time period are set as the reference period, and the amount of change in the amount of hot water stored in the hot water storage tank is detected for each of the reference periods to detect the change in the hot water storage tank. The amount of hot water used is detected, and when the amount of hot water is large, the target amount of hot water is increased, and when the amount of hot water is small, the amount of hot water is reduced. There is a method in which the required hot water storage amount is calculated as the required hot water storage amount and the required hot water storage amount is stored in the hot water storage tank before the reference period for each of a plurality of reference periods. Kaihei 9-10
No. 1059).

In this type of hot water storage type hot water supply device,
For example, it is possible to set the hot water filling time for bathing, and when the hot water filling amount reaches the required hot water storage amount at the hot water filling time, the heating means is operated at the start time before the hot water filling time. It is configured with a bath reservation function to start, and in this bath reservation function, a fixed set amount of water filling from the state where there is no hot water in the bathtub, or according to the actual hot water supply usage situation The calculated target hot water storage amount is set as the required hot water storage amount.

[0005]

However, in the above-described conventional hot water storage type hot water supply apparatus, the set hot water filling amount is set from the state in which there is no hot water in the bathtub, or the actual hot water supply usage condition is adjusted. The target hot water storage amount obtained by
Since it is set as the required hot water storage amount, the required hot water storage amount is set regardless of the presence state of hot and cold water in the bathtub. For example, there is remaining hot water available for filling in the bathtub. In such a case, excess hot water is stored for the remaining hot water, and the hot water may be radiated or the operating time of the heating means may be extended, which may reduce the efficiency of the device. There is.

Further, in the case of setting the target hot water storage amount obtained in accordance with the actual hot water supply usage condition as the required hot water storage amount, since the amount of water filling used for filling the bathtub is large, The amount of hot water used in the hot water storage tank will vary greatly depending on whether or not to use it, and whether or not to use the remaining hot water on the previous day. It becomes difficult, and there is a risk that excess hot water will be stored in the hot water storage tank relative to the actually needed amount, or conversely, the hot water storage amount of the hot water storage tank will be insufficient relative to the actually needed amount.

The present invention has been made by paying attention to such a point, and an object thereof is to prevent an excessive amount of hot water from being stored while the amount of hot water stored in the hot water storage tank is not insufficient with respect to the amount actually required. By doing so, it is an object to provide a hot water storage type hot water supply device capable of improving the efficiency of the device.

[0008]

In order to achieve this object, according to the invention as set forth in claim 1, a hot water storage tank having a hot water supply passage connected to an upper portion and a water supply passage connected to a lower portion, and In a hot water storage type hot water supply device provided with heating means for heating hot water in the hot water storage tank and operation control means for controlling the operation of the heating means, the hot water in the hot water storage tank is branched from the hot water supply passage. A hot water supply path to be supplied into the bathtub and a residual hot water detection means for detecting the residual hot water in the bathtub are provided, and the operation control means is configured to detect the remaining hot water in the bathtub based on the detection information of the residual hot water detection means. When the remaining hot water determination process for determining the state of the hot water is executed, and when it is determined that the remaining hot water does not exist in the bathtub in the remaining hot water determination process, the amount of hot water stored in the hot water storage tank is set at the hot water filling time. Becomes tight As described above, when the normal operation start time before the hot water filling time is reached, the normal hot water storage process for controlling the operation of the heating means is executed to start the operation of the heating means, and the remaining hot water is left in the bathtub. When it is determined that the amount of hot water stored in the hot water storage tank is equal to the required amount of hot water filling, which is smaller than the preset amount of hot water filling, based on the detection information of the remaining hot water detecting means, the amount of hot water stored in the hot water storage tank is set at the hot water filling tank. At the remaining hot water operation start time before the hot water filling set time and after the normal operation start time so that the required hot water filling amount is reached, the heating means of the heating means is started to start the operation of the heating means. It is configured to execute a residual hot water storage process for controlling the operation.

That is, when the operation control means determines by the execution of the remaining hot water determination process that there is no remaining hot water in the bathtub, the amount of hot water stored in the hot water storage tank at the time when the hot water filling is set does not exist in the bathtub. When the normal operation start time for setting the amount of hot water to be filled is set, and when the normal operation start time comes, it becomes possible to execute the normal hot water storage processing for starting the operation of the heating means. Further, when it is determined that the remaining hot water is present in the bathtub by executing the remaining hot water determination processing, the operation control means obtains a small necessary amount of hot water from the set hot water amount corresponding to the remaining hot water, and sets the hot water filling. At the time, the remaining hot water operation start time for setting the amount of hot water in the hot water storage tank to the required amount of hot water filling is set, and at the remaining hot water operation start time, the remaining hot water storage processing for starting the operation of the heating means is executed. Is possible.

[0010] Therefore, the operation control means, depending on the state of the remaining hot water in the bathtub, so as to store the hot water in the hot water storage tank at the set-up time for the amount of water that is actually required for the hot water filling, the normal hot water storage process or the remaining hot water storage process. Since it is possible to perform any of the hot water storage processes, the hot water storage amount in the hot water storage tank does not fall short of the actual required amount, and the excess hot water storage is prevented, thereby improving the efficiency of the device. Thus, it has become possible to provide a hot water storage type hot water supply device capable of improving the temperature.

According to a second aspect of the invention, the heating means comprises a main heating means and an auxiliary heating means,
The operation control means stores the required operating time of the main heating means for the total heating efficiency when the hot water for heating to be heated by the main heating means exceeds the set total heating efficiency, and the remaining hot water storage treatment In, in the hot water filling set time, obtain the heating operation time of the heating means for making the hot water storage amount in the hot water storage tank the required hot water filling amount,
Whether the heating operation time is equal to or longer than the required operation time or less is determined, and when the heating operation time is equal to or longer than the required operation time, the operation of the heating means is controlled in a state where only the main heating means is operated. When the heating operation time is less than the required operation time, the heating selection process for controlling the operation of the heating means is executed in a state where only the auxiliary heating means is operated.

That is, when the main heating means has a high heating efficiency when a certain amount of time elapses after the operation is started, as in the case where the main heating means is configured by using a heat pump, the operation is increased. Since the total heating efficiency can be improved as the time is lengthened, it is configured to set the required operating time for the total heating efficiency to exceed the set total heating efficiency, and the operation control means stores the required operating time. There is. Then, the operation control means selects one of the main heating means and the auxiliary heating means in the remaining hot water storage processing, depending on whether the heating operation time of the heating means is equal to or longer than the required operation time stored in memory. Since it becomes possible to perform the heating selection process to be operated, in the remaining hot water storage process, the operation that is advantageous from the viewpoint of efficiency of the main heating means and the auxiliary heating means is selected to control the operation of the heating means. Therefore, the efficiency of the device can be improved. By the way, the heating efficiency is indicated by a value obtained by dividing the energy amount actually obtained for heating by the input energy amount, and the total heating efficiency is the value obtained by integrating the heating efficiency only for the operating time. It represents.

According to the third aspect of the invention, the operation control means starts the remaining hot water operation from the normal operation start time based on the detection information of the remaining hot water detecting means in the remaining hot water storage processing. During the time, the remaining hot water state change detection processing for detecting the change in the state of the remaining hot water in the bathtub is executed, and in the remaining hot water state change detection processing, when a change in the state of the remaining hot water is detected, It is configured to perform a heating selection process.

That is, in the remaining hot water storage processing, the operation control means causes the remaining hot water to be drained or the temperature of the remaining hot water to drop between the normal operation start time and the remaining hot water operation start time, thereby When the state changes, the heating control process is configured to be executed again. Therefore, the operation control unit changes the state of the remaining hot water between the normal operation start time and the remaining hot water operation start time. In this case, based on the detection information of the remaining hot water detecting means, the required hot water filling amount is obtained again, and the heating operation time of the heating means obtained based on the required hot water filling amount is stored. Depending on
It is possible to select and operate either the main heating means or the auxiliary heating means.

Therefore, if there is a change in the state of the remaining hot water between the normal operation start time and the remaining hot water operation start time, one of the main heating means and the auxiliary heating means can be operated in response to the change in the remaining hot water state. Since it is possible to repeatedly perform the operation of selecting the more advantageous one in terms of efficiency, it is possible to operate the heating section with as high a heating efficiency as possible, further improving the efficiency of the device. It becomes possible.

According to the fourth aspect of the present invention, when the operation control means determines in the remaining hot water determination processing that there is remaining hot water in the bathtub, the remaining hot water is informed. The hot water notification is performed, and when the release operation for canceling the remaining hot water notification is performed, the remaining hot water storage process is executed.

That is, the operation control means can notify the remaining hot water when there is remaining hot water in the bathtub, and can execute the remaining hot water determination processing only when the user performs a releasing operation. Therefore, it is possible to make the user recognize that there is remaining hot water in the bathtub, and only when the user's release operation confirms the intention of the user to perform hot water filling using the remaining hot water, It will be possible to fill water using the remaining hot water. Therefore, it is possible to perform an operation that reflects the user's intention, and it is possible to perform control in accordance with the user's request.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot water storage type hot water supply apparatus according to the present invention will be described with reference to the drawings. [First Embodiment] As shown in FIG. 1, a hot water storage type hot water supply apparatus includes a hot water storage tank 1 for storing hot stratified water, a circulation path 2 for circulating hot water in the hot water storage tank 1, It is composed of a heating section 3 as a heating means for heating the hot water flowing through the circulation path 2, an operation control section H as an operation control means for controlling the hot water supply operation, and the like. The hot water is circulated in the circulation path 2 while being heated by the heating unit 3.

Whether or not the hot water storage amount in the hot water storage tank 1 is equal to or larger than the minimum detected hot water storage amount, which is larger than the minimum secured amount,
An uppermost thermistor S1 as a minimum detected hot water storage amount detecting means for detecting the hot water temperature and a bottom thermistor S2 for detecting whether the hot water storage amount is full or more are provided. ing. The hot water storage tank 1 is connected with a water supply passage 4 for supplying water from the bottom to the hot water storage tank 1 by using tap water pressure, and a hot water supply passage 5 for supplying hot water from the upper portion of the hot water storage tank 1. The hot water storage tank 1 is supplied with water from the water supply passage 4.

A mixing water supply passage 6 branched from the water supply passage 4 is connected to the hot water supply passage 5, and the hot water supply passage 5 is connected to the connecting portion.
A mixing valve 7 is provided that is capable of adjusting the mixing ratio of the hot water from the water and the water from the mixing water supply passage 6. A water supply thermistor 8 for detecting the water supply temperature is provided at a branch point between the water supply passage 4 and the mixing water supply passage 7.

On the upstream side of the mixing valve 7 in the hot water supply passage 5, from the upper part of the hot water storage tank 1 to the hot water supply passage 5
A hot water outlet outlet thermistor 9 for detecting the temperature of the hot water supplied is provided in the hot water supply passage 5, downstream of the mixing valve 7 in the hot water supply passage 5 to adjust the flow rate of the hot water in the hot water supply passage 5, and the mixing valve 7. A mixing thermistor 11 for detecting the temperature of the mixed hot and cold water is provided. Then, the downstream side of the mixing thermistor 11 in the hot water supply passage 5 is the hot water tap 1 of the kitchen or the washroom.
4 is divided into a general hot water supply path 5a for supplying hot water and a hot water supply path 5b for supplying hot and cold water to the bathtub P, and the hot water supply path 5b is connected to the bathing path 13 from the bathtub P to the hot water supply path 5b. A hot water filling opening / closing valve 29 is provided to supply hot water to the bathtub P through both the bath return path 12 and the bath outgoing path 13.

When hot water is supplied to the hot water tap 14, the mixing valve 7 is opened so that the temperature of the hot water to be supplied becomes the hot water set temperature based on the hot water set temperature, the detection information of the hot water outlet thermistor 9 and the water supply thermistor 8. The temperature is adjusted to supply hot and cold water having a set temperature. Further, even when the bathtub P is filled with hot water, the opening degree of the mixing valve 7 is adjusted to supply hot and cold water having a preset temperature for filling the bathtub. The hot water supply operation means G includes a hot water storage outlet thermistor 9, a water supply thermistor 8, a mixing valve 7, a mixing thermistor 11,
Further, it is constituted by a hot water filling on-off valve 29 and the like.

The circulation path 2 and the hot water storage tank 1 return the hot water flowing through the circulation path 2 into the hot water storage tank 1 or take out the hot water from the hot water storage tank 1 into the circulation path 2 so that the hot water storage tank 1 Are connected in two places, the upper part and the bottom part. More specifically, a hot water storage passage 15 for supplying hot water from the circulation passage 2 into the hot water storage tank 1 is connected to the upper portion of the hot water storage tank 1, and a hot water storage opening / closing valve 16 is provided in the hot water storage passage 15. Has been. Further, a take-out path 17 for taking out hot water from the hot-water storage tank 1 to the circulation path 2 is connected to the bottom of the hot-water storage tank 1.

In the circulation path 2, a circulation flow rate sensor 18 for detecting the circulation rate of the hot water in the circulation path 2, a circulation pump 19, and a circulation for adjusting the circulation rate of the hot water in the circulation path 2 in order. The flow control valve 20, the heating unit 3, and the heating temperature thermistor 2 for detecting the temperature of the hot water heated by the heating unit 3.
1, an on-off valve 22 that connects and disconnects the flow of hot water, and a heat radiating portion 23 for bath heating are provided. The hot water circulation means E includes a circulation path 2, a circulation pump 19, a circulation flow rate sensor 18, a circulation flow rate adjustment valve 20, a heating temperature thermistor 21, and a hot water storage opening / closing valve 1.
6 and the on-off valve 22 and the like.

Although not described in detail, the heating section 3 is a heat pump type heating section 3a as a main heating means for supplying a refrigerant by a heat pump device to heat hot water, and an auxiliary heating means for heating hot water by burning a burner. And the auxiliary heating unit 3b, and the heat pump heating unit 3a and the auxiliary heating unit 3b are provided in this order from the upstream side in the circulation direction of the hot water of the circulation path 2.

The heat pump type heating unit 3a has a higher heating efficiency when a certain amount of time has passed since the operation was started. The longer the operating time, the more the total heating efficiency can be improved. It is configured. Further, the auxiliary heating unit 3b can output an auxiliary heating capacity larger than the heating capacity of the heat pump type heating unit 3a on demand, and the auxiliary heating capacity is necessary for filling the bathtub P with water. The heating capacity is set to satisfy the heating capacity, and the hot water for heating is heated at a constant heating efficiency. By the way, the heating efficiency is indicated by a value obtained by dividing the energy amount actually obtained for heating by the input energy amount, and the total heating efficiency is the value obtained by integrating the heating efficiency only for the operating time. It represents.

The heat pump heating unit 3a heats the hot water flowing through the circulation path 2 by operating the heat pump device by communication with the operation control unit H and supplying the refrigerant to the heat pump heating unit 3a. Is configured to. Further, the auxiliary heating unit 3b starts the combustion of the burner when the amount of water more than the set amount is supplied through the circulation path 2, and stops the combustion of the burner when the amount of the supplied water becomes less than the set amount, and the auxiliary heating unit 3b stops the combustion of the burner. In the combustion state, the temperature of the heated hot water is adjustable by adjusting the combustion amount of the burner.

A bath return path 12 and a bath exit path 13 are connected to the bath heating heat dissipation portion 23, and the bath pump 2
By the operation of 4, the bath return path 12 and the bath exit path 13
The hot water in the bathtub P is circulated through the hot water, and the hot water heated by the heating unit 3 is circulated through the circulation path 2,
The hot and cold water flowing through the circulation path 2 is configured to heat the hot and cold water in the bathtub P circulated through the bath return path 12 and the bath outgoing path 13. Bath return route 1
2, in order from the upstream side in the circulation direction of the hot water in the bathtub P,
Pressure type water level sensor 2 for detecting the water level of hot water in the bathtub
5. A bath return thermistor 26 that detects the temperature of hot water in the bath return path 12, a two-way valve 27, a bath pump 24, and a bath water flow switch 28 are provided, and the water level sensor 25 and the bath return thermistor 26 act as remaining hot water detecting means. Is configured to. The bath operation means F is the water level sensor 2
5, a bath return thermistor 26, a two-way valve 27, a bath pump 24 and the like.

The operation control unit H, as shown in FIG.
Based on the command from the hot water storage remote controller R2, the hot water circulation means E,
By controlling the operations of the hot water supply operation means G, the bath operation means F, and the heating unit 3, a hot water storage operation of storing hot water in the hot water storage tank 1, and a hot water supply operation of supplying desired hot water to the hot water tap 14 or the bathtub P. The reserved hot water filling operation of filling the bathtub P with a desired state at the hot water filling time and the additional heating operation of heating the hot water in the bathtub P are executed.

Although not shown, the hot water storage remote controller R2 can issue a hot water storage request, and can set the hot water supply set temperature in the hot water supply operation, the hot water filling completion set time in the reserved hot water filling operation, the hot water filling set temperature, the set hot water filling amount, and the like. It is configured to be configurable.

Hereinafter, each operation will be described. In the hot water storage operation, when there is a hot water storage request from the hot water storage remote controller R2,
The hot water storage opening / closing valve 16 is opened, the circulation pump 19 is operated, water is taken out from the bottom of the hot water storage tank 1 into the circulation path 2 and heated by the heating unit 3, and then the water is passed through the hot water storage path 15 to the upper part of the hot water storage tank 1. Is configured to supply.

The operation of the heating unit 3 in the hot water storage operation will be described. Basically, the heat pump device is operated to supply the refrigerant to the heat pump heating unit 3a, and the heat pump heating unit 3a circulates the circulation path. The hot water of 2 is heated, and the heating amount of the heat pump heating unit 3a is adjusted so that the temperature detected by the heating temperature thermistor 21 becomes the target hot water storage temperature (for example, 60 ° C.).
If the hot water in the circulation path 2 cannot be heated so that the temperature detected by the heating temperature thermistor 21 becomes the target hot water storage temperature (for example, 60 ° C.) only by the heating by the heat pump heating unit 3a, or by the heat pump heating unit 3a. In a special case such as when the heating is not possible, the temperature detected by the heating temperature thermistor 21 is the target hot water storage temperature (for example, 60
The heating amount by the auxiliary heating unit 3b is adjusted so as to be (° C.).

In this manner, the hot water in the circulation path 2 is heated to the preset hot water storage temperature by the heating unit 3 and the hot water is supplied from the upper portion of the hot water storage tank 1 to form the temperature stratification, thereby storing the hot water. It is configured to store hot water in the tank 1.

The hot water supply operation is started when the hot water tap 14 is opened or when the bathtub P is filled with water. Basically, the hot water stored in the hot water storage tank 1 is taken out and The water is mixed and supplied to the hot water tap 14 or the bathtub P through the hot water supply passage 5. In addition, there is no hot water stored in the hot water storage tank 1,
If the amount of hot water stored in the hot water storage tank 1 is less than the minimum secured amount, the hot water storage operation described above is executed, and while hot water is stored in the hot water storage tank 1, the hot water is taken out and supplied to the hot water tap 14 or the bathtub P. Is configured.

In addition, the hot water stored in the hot water storage tank 1 is taken out to the hot water supply passage 5, and the hot water storage remote control R is operated.
Based on the hot water supply set temperature set in 2, etc., the detection information of the hot water outlet thermistor 9 and the water supply thermistor 8, while adjusting the opening of the mixing valve 7 so that the temperature of the hot water to be hot water reaches the hot water set temperature. Based on the detection information of the mixing thermistor 11, the opening degree of the mixing valve 7 is finely adjusted based on the difference between the detected temperature and the hot water supply set temperature, so that the hot water at the hot water supply set temperature is supplied. .

In the reserved hot water filling operation, the two-way valve 27 is closed, the bath pump 24 is operated, and the like, and the rest in the bathtub P is detected based on the detection information of the water level sensor 25 and the bath return thermistor 26. The remaining hot water determination processing for determining the state of the hot water is executed, and based on the determination result of the remaining hot water determination processing, the normal hot water storage processing for filling the hot water from the state in which there is no hot water in the bathtub P or the remaining hot water It is configured such that either one of the remaining hot water storage processes for filling water is executed to fill the amount of hot and cold water having the preset hot water filling temperature at the preset hot water filling temperature.

When the operation control unit H determines in the above-described remaining hot water determination process that the remaining hot water is present in the bathtub P, the operation control unit H issues a remaining hot water notification indicating that the remaining hot water exists, and the remaining hot water is notified. When a cancel operation for canceling the notification is performed, the above-described remaining hot water storage processing is executed to notify the user that there is remaining hot water, and the user who wants to fill the hot water using the remaining hot water. The remaining hot water storage processing is executed only when there is an intention.

The normal hot water storage process will be described below. The normal hot water storage process is executed when it is determined in the remaining hot water determination process that there is no remaining hot water in the bathtub P, so that the hot water storage amount in the hot water storage tank 1 becomes the set hot water filling amount at the hot water filling setting time. In addition, when the normal operation start time before the hot water filling setting time comes, the operation of the heating unit 3 is controlled to perform the hot water storage process in the hot water storage tank 1 in order to start the operation of the heating unit 3. Then, when the amount of hot water stored in the hot water storage tank 1 reaches the set amount of hot water, a hot water filling process of supplying the hot water stored in the hot water tank 1 to the bathtub P is performed, and then a hot firing process of heating the hot water in the hot bath P is performed. At the time when the filling of water is completed, the water of the set temperature is filled with the set amount of water.

More specifically, when the above-described hot water storage operation is executed with only the heat pump heating unit 3a being operated, the required operating time for storing the set amount of hot water in the hot water storage tank 1 and the hot water storage Using the hot and cold water stored in the tank 1, set the amount of hot water at the set temperature for hot water filling. The amount of hot water filling and reheating for hot water filling is calculated as the required operating time rather than the time when the hot water filling is completed. The normal operation start time is set to a time that is earlier than the time of adding the hot water and reheating operation time. Then, at the time of the normal operation operation, the hot water storage operation described above is executed to perform hot water storage processing while only the heat pump heating unit 3a is operated, and the set amount of hot water is stored in the hot water storage tank 1 at the hot water filling time. After that, the hot water filling opening / closing valve 29 is opened, and the hot water supply operation is performed to perform the hot water filling process. When the accumulated amount of the hot water supply flow rate sensor 10 reaches the set hot water filling amount, the reheating operation described later is executed. The additional heating process is performed to fill the amount of hot water at the preset temperature with the set amount of hot water at the time when the hot water filling is completed.

Incidentally, the required operating time and the hot water filling / heating operation time are obtained based on the water temperature, the air temperature, and the heating capacity of the heating unit 3 (heating capacity of the heat pump type heating unit 3a) set in advance. Therefore, the hot water supply time required to supply the set amount of hot water from the hot water storage tank 1 to the bathtub P and the heating time for heating the hot water in the bathtub P to the hot water set temperature are added to the hot water. It is calculated as the tension / heating time. Further, the water filling setting time is set to be earlier than the water filling completion setting time by the water filling / heating operation time.

The above-mentioned residual hot water storage processing will be described below. The remaining hot water storage processing is executed when it is determined in the remaining hot water determination processing that there is remaining hot water in the bathtub P, and based on the detection information of the water level sensor 25 and the bath return thermistor 26, the set hot water amount In order to obtain a small amount of required filling water, the hot water storage tank 1 is set at the filling time.
When the remaining hot water operation start time before the hot water filling setting time and after the normal operation start time is reached, the heating unit 3 starts heating so that the amount of stored hot water in the inside becomes the required hot water filling amount. The hot water storage process is performed by controlling the operation of the part 3, and when the hot water storage amount in the hot water storage tank 1 reaches the required hot water filling amount, the hot water filling process is performed to supply the hot water to the bathtub P. After that, an additional heating process is performed to reheat the hot and cold water in the bathtub P, and the hot and cold water of the hot water filling set temperature is set at the hot water filling set temperature at the hot water filling completion setting time.

The operation control unit H stores the required operating time of the heat pump heating unit 3a so that the total heating efficiency when heating the hot water for heating by the heat pump heating unit 3a exceeds the set total heating efficiency. However, in the above-described residual hot water storage processing, the heating unit 3 for adjusting the amount of hot water stored in the hot water storage tank 1 to the required amount of hot water filling at the time when the hot water filling is set.
Of the heating operation time, to determine whether or not the heating operation time is the required operation time or more, based on the determination result, select one of the heat pump heating unit 3a or the auxiliary heating unit 3b, The heating selection process for controlling the operation of the heating unit 3 is executed in a state where only the selected one is operated.

Further, the operation control section H, in the residual hot water storage processing, the water level sensor 25 and the bath return thermistor 26.
Based on the detection information of the remaining hot water state change detection processing for detecting the change in the state of the remaining hot water in the bathtub P between the normal operation start time and the remaining hot water operation start time. In the process, when a change in the state of the remaining hot water is detected, the required amount of hot water is calculated again based on the detection information of the water level sensor 25 and the bath return thermistor 26, and the above heating selection process is executed. Has been done.

In addition, in the residual hot water storage processing, the required amount of hot water to be filled with the remaining hot water is obtained from the amount and temperature of the remaining hot water, and the required hot water is set at the preset time of hot water filling. The remaining hot water operation start time for storing hot water in the hot water storage tank 1 by the amount of tension is set, and when the remaining hot water operation start time is reached, the heating unit 3 is started to perform hot water storage processing in the hot water storage tank 1. At the tension set time, hot water is supplied to the bathtub P, and then hot water is heated in the bathtub P to perform hot water treatment at the hot water finish temperature. The amount of water filling is set.

In the remaining hot water storage process,
As the operation of the heating unit 3, it is configured to select whether the heat pump type heating unit 3a is operated or the auxiliary heating unit 3b is operated, whichever is more effective from the viewpoint of efficiency to improve the efficiency. ing. That is, the heating operation time of the heating unit 3 to obtain the required amount of water filling is determined at the filling time, and when the heating operation time is equal to or longer than the required operation time, the heat pump type heating unit 3a is selected and heating is performed. When the operating time is less than the required operating time, the auxiliary heating unit 3b is selected.

In addition, basically, it is more efficient to operate the heat pump type heating unit 3a than to operate the auxiliary heating unit 3b. Therefore, the auxiliary heating in the selection of the operation of the heating unit 3 is performed. When the operation of the section 3b is selected, the change in the state of the remaining hot water in the bathtub P is monitored between the normal operation start time and the remaining hot water operation start time, and when there is a change in the state of the remaining hot water, By determining the heating operation time of the heating unit 3 and selecting the operation of the heating unit 3 according to the heating operation time, the heat pump type heating unit 3a is operated as much as possible while responding to the change in the state of the remaining hot water. , Is designed to improve efficiency.

In this way, in accordance with the state of the remaining hot water in the bathtub P, the normal hot water storage process or the remaining hot water is stored so that the hot water is stored in the hot water storage tank at the set time for the hot water filling actually. Performing one of the hot water storage processes so that the amount of hot water stored in the hot water storage tank does not become insufficient with respect to the amount actually needed, and the excess hot water storage is prevented to improve the efficiency of the device. There is. Moreover, when operating the heating unit 3, one of the heat pump type heating unit 3a and the auxiliary heating unit 3b, whichever is more effective in terms of efficiency, is selected and operated to further improve the efficiency of the device. ing.

Explaining the remaining hot water storage processing concretely, first, the required amount of hot water filling is determined based on the amount and temperature of the remaining hot water based on the detection information of the water level sensor 25 and the bath return thermistor 26, and further, Based on the required amount of filling water, the heating operation time of the heating unit 3 for setting the amount of hot water stored in the hot water storage tank 1 to the required amount of filling water at the filling time is determined.

When the heating operation time of the heating unit 3 is equal to or longer than the required operation time, only the heat pump type heating unit 3a is operated to set the hot water at the hot water filling temperature at the time when the hot water filling is completed. The heat pump operation start time for tensioning is set as the remaining hot water operation start time, and when the heat pump operation start time is reached, the operation of the heating unit 3 is started in a state where only the heat pump type heating unit 3a is operated, and hot water filling is performed. At the completion set time, the hot and cold water of the set temperature is set to the set amount.

When the heating operation time of the heating unit 3 is less than the required operation time, the required operation time and the set time are added to the filling completion time and the operation is started later than the normal operation start time. The remaining hot water determination time is set as the remaining hot water operation start time, and when the remaining hot water operation start time is reached, based on the detection information of the water level sensor 25 and the bath return thermistor 26, the normal hot water start time is changed from the normal operation start time. The change in the state of the remaining hot water in the bathtub P is detected during the period. Regarding the set time for setting the remaining hot water determination time, when only the heat pump heating unit 3a is operated for the required operating time, the hot water storage amount in the hot water storage tank 1 is the required hot water filling amount at the hot water filling setting time. From the above, the operating time when the auxiliary heating unit 3b is operated to fill and reheat the bath P, the above-mentioned filling and reheating operation time, and a predetermined estimated time are added. Time is set as the set time.

When a change in the state of the remaining hot water in the bathtub P is detected, based on the amount and temperature of the remaining hot water,
The required amount of water filling and the heating operation time of the heating unit 3 are obtained again, and it is determined again whether the heating operation time is equal to or longer than the required operation time or less. When the re-obtained heating operation time is equal to or longer than the required operation time, the operation of the heating unit 3 is started in a state where only the heat pump heating unit 3a is operated, and the filling temperature of the filling temperature is set at the filling filling setting time. The amount of hot and cold water is set to a certain level.

In this case, since the remaining hot water is all drained, the required amount of filling water becomes large, and the heating operation time of the heating unit 3 when only the heat pump heating unit 3a is operated is the current time. When the amount of hot water stored in the hot water storage tank 1 is insufficient for the required amount of water filling at the time of water filling setting, such as when the water filling time becomes longer than the time of water filling, the heat pump heating unit 3a.
Is run for the required operating time, the hot water stored in the hot water storage tank 1 is used to fill the bathtub P, and then the auxiliary heating section 3b is operated to fill the shortage with hot water. By performing processing or the like, the hot and cold water having the preset hot water filling temperature is filled at the preset hot water filling temperature.

Also, there is no change in the state of the remaining hot water,
Even if the heating operation time is calculated again, if the heating operation time is less than the required operation time, only the auxiliary heating part 3b is operated to set the hot and cold water at the hot water filling set temperature at the hot water filling completion setting time. The auxiliary operation start time for tensioning is set as the remaining hot water operation start time, and at the auxiliary operation start time, the operation of the heating unit 3 is started in a state where only the auxiliary heating unit 3b is operated, and the auxiliary heating unit is started. After the hot and cold water heated in 3b is directly filled in the bathtub P, the hot water treatment in which the hot and cold water in the bathtub P is heated is executed, and the hot and cold water having the hot water filling temperature is set at the hot water filling completion setting time. I try to fill the amount of water.

The additional heating operation is performed in response to a request for additional heating from the hot water storage remote controller R2 or in response to the request for the reserved hot water filling operation described above. When the bath pump 24 is operated and the water flow switch 28 is turned on. , The on-off valve 22 is opened to start the operation of the circulation pump 19 and the heating unit 3, and the circulation path 2
The hot water is heated by the heating unit 3 to radiate the heat from the bath heating unit 23.
And then circulate in the state of being supplied to the heating unit 3. Then, by operating the bath pump 24, the hot water in the bathtub P is passed through the bath return path 12 and the bath heating heat radiating unit 2 is used.
3 is supplied to the bathtub 3 and then returned to the bathtub P through the bathing path 13 and circulated.

In this way, in the bath heating heat dissipation portion 23, the hot and cold water in the bathtub P is heated by heating the hot and cold water flowing through the circulation path 2 to the hot and cold water in the bathtub P. It is configured. When the detected temperature of the bath return thermistor 26 reaches a set temperature such as a hot water filling temperature or a hot water setting temperature, the bath pump 24, the circulation pump 19 and the heating unit 3 are stopped.

FIG. 3 shows the operation of the reserved hot water filling operation.
And it demonstrates based on the flowchart of FIG. First, when the filling completion time is set by the hot water storage remote controller R2, the normal operation start time for setting the amount of filling water at the setting temperature is set at the filling completion setting time. When the normal operation start time comes, the remaining hot water determination process is executed to determine whether or not there is remaining hot water (steps 1 to 3). When there is no remaining hot water in the bathtub P, normal hot water storage processing is executed to perform hot water storage processing in the hot water storage tank 1 by operating only the heat pump heating unit 3a, and the hot water storage amount in the hot water storage tank 1 is set to the set hot water. When the amount of hot water reaches the limit and the hot water storage is completed, the hot water storage process is stopped and the hot water supply process is performed to supply the hot and cold water stored in the hot water storage tank 1 to the bathtub P (steps 3 to 6).

After that, based on the detection information of the hot water supply flow rate sensor 10, when the desired amount of hot and cold water is supplied to the bathtub P and the hot water filling is completed, the hot water filling process is stopped and the hot and cold water in the bathtub P is reheated. When the temperature of the hot and cold water in the bathtub P reaches the preset water filling temperature and the boiling is completed, the reheating process is stopped and the hot and cold water of the preset water filling temperature is set. A stop process for notifying the completion is executed (steps 7 to 10).

In the remaining hot water determination processing, when there is remaining hot water in the bathtub P (step 3), the remaining hot water notification processing for notifying that there is remaining hot water is executed, and the hot water storage remote controller R2 is operated. When a cancel operation for canceling the remaining hot water notification is performed, a calculation process is performed to obtain a required amount of hot water filling and a heating operation time of the heating unit 3 for storing the required amount of hot water filling (steps 11 to 13). ). It should be noted that when the operation for canceling the remaining hot water notification is not performed and the remaining hot water is drained by the user and then the hot water storage remote controller R2 is operated, it is assumed that there is no remaining hot water in the bathtub P.
The hot water storage processing, the hot water filling processing, and the additional heating processing described above are sequentially executed.

If the heating operation time of the heating unit 3 is longer than the required operation time, only the heat pump type heating unit 3a is operated to set the hot and cold water at the set temperature at the time when the filling is completed. When the heat pump operation start time for setting the heat pump operation time is reached (steps 14 and 15), the amount of hot water stored in the hot water storage tank 1 is set as the required amount of hot water filling,
Further, the additional heating process is sequentially executed (steps 4 to 10).

If the heating operation time of the heating unit 3 is less than the required operation time, the remaining hot water determination time is set, and at the remaining hot water determination time, the remaining hot water state change detection processing is executed, It is determined whether or not the state of the remaining hot water has changed (steps 16 and 17). Then, when the state of the remaining hot water changes (step 17), the necessary amount of hot water filling is obtained again, and the calculation process for obtaining the heating operation time of the heating unit 3 for storing the required amount of hot water filling is executed. However, if the heating operation time is longer than the required operation time (step 18, 1
9), the amount of hot water stored in the hot water storage tank 1 is determined again as the required amount of hot water filling, and the hot water storage process, the hot water filling process, and the additional heating process are sequentially executed (steps 4-1).
0).

If there is no change in the state of the remaining hot water (step 17) or if the re-obtained heating operation time is less than the required operation time (step 19), only the auxiliary heating part 3b is operated to set the filling time. Set the amount of water filling at the set temperature to the auxiliary operation start time, and when the auxiliary operation start time comes (step 2
0), in a state where only the auxiliary heating unit 3b is operated, the operation of the heating unit 3 is started, and the above-described filling process and additional heating process are executed.

[Second Embodiment] This second embodiment shows another embodiment of the heating unit 3 in the first embodiment. The configuration of the second embodiment will be described below.
It will be described with reference to the drawings. Since the other configurations are the same as those in the first embodiment, the detailed description thereof will be omitted by giving the same reference numerals and the like.

That is, in the above-described first embodiment, an example in which the auxiliary heating section 3b as the auxiliary heating means is configured to heat the hot water flowing through the circulation path 2 has been shown.
In the embodiment, as shown in FIG. 5, the auxiliary heating device 30 as the auxiliary heating means heats the hot water taken out from the upper part of the hot water storage tank 1 and then supplies it to the bathtub P. It is configured to have a hot water supply function of mixing hot water and hot water taken out from the tank with hot water of a desired temperature and a hot water heating function of heating and heating hot water in the bathtub P.

In addition, in the auxiliary heating device 30,
Hot water supply passage 5 connected to the upper part of the hot water storage tank 1, bath return passage 12 connected to bathtub P, bath outgoing passage 13 as a hot water filling passage, general hot water supply passage 5a connected to hot water tap 14, mixing water supply passage Each of the 6 is connected. Then, the auxiliary heating device 30 mixes hot and cold water taken out from the upper part of the hot water storage tank 1 with water to supply hot and cold water having a desired temperature,
After heating the hot water taken out from the upper part of the hot water storage tank 1, it is supplied to the bathtub P through the bathing path 13, and further,
By the operation of the bath pump 24, the hot and cold water in the bathtub P circulated through the bath return path 12 and the bath outward path 13 is heated and reheated.

In the second embodiment, since the auxiliary heating device 30 is provided with the additional heating function, in the first embodiment, the on-off valve 22 provided in the circulation path 2 and the heat for bath additional heating are radiated. It is possible to omit the portion 23, the hot water storage path 15, and the take-out path 17, and the circulation path 2 has its upstream end in the circulation direction of the hot water connected to the bottom of the hot water storage tank 1 and its downstream end connected to the hot water storage tank. It is connected to the upper part of the tank 1.

[Third Embodiment] The third embodiment shows another embodiment of the structure for heating the hot water in the hot water storage tank 1 in the first and second embodiments. The third embodiment will be described below. The configuration in the form will be described based on the drawings. Regarding other configurations, the first
Since the second embodiment is the same as the second embodiment, the detailed description thereof will be omitted by giving the same reference numerals and the like.

That is, in the first and second embodiments, the hot water in the hot water storage tank 1 is taken out to the circulation path 2, heated by the heat pump type heating unit 3a, and then returned to the upper part of the hot water storage tank 1. Although the configuration is shown in which the hot water in the hot water storage tank 1 is heated while circulating the hot water in the hot water storage tank 1, in the third embodiment, as shown in FIG. 6, the hot water in the hot water storage tank 1 is heated. In-tank heating part 3
1 is provided, and the hot water in the hot water storage tank 1 is heated by supplying the hot water heated by the heat pump heating unit 3 a to the in-tank heating unit 31.

In the third embodiment, the circulation flow rate adjusting valve 20 and the heating temperature thermistor 21 provided in the circulation path 2 in the first and second embodiments can be omitted.

[Other Embodiments] (1) In the first to third embodiments, an example is shown in which the hot water storage process, the hot water filling process, and the additional heating process are sequentially executed in the remaining hot water storage process. The hot water filling process may be performed while the hot water storage process is being performed. In this case, since the hot water storage process and the hot water filling process are performed at the same time, the hot water filling time is earlier than the hot water filling completion time by the additional heating time for heating the hot and cold water in the bathtub P to the hot water filling set temperature. It is set as the set time, and when the hot water storage process ends, the desired amount has already been supplied from the hot water storage tank 1 to the bathtub P, so the amount that has already been supplied to the bathtub P rather than the set hot water filling amount. When the amount becomes small, the hot water storage process ends.

(2) In the first to third embodiments, the remaining hot water state change detection process is executed at the remaining hot water determination time at one point between the normal operation start time and the remaining hot water operation start time. , The configuration to re-execute the heating selection process according to the detection result is shown. However, between the normal operation start time and the remaining hot water operation start time, the remaining hot water state is continuously or every time a set time elapses. Repeat the detection process,
The heating selection process may be configured to be performed again according to the detection result, and the number of executions of the remaining hot water state detection process may be appropriately changed.

(3) In the first to third embodiments described above, when it is determined in the remaining hot water determination process that there is remaining hot water in the bathtub P, the remaining hot water notification is performed and the remaining hot water notification is canceled. When the release operation is performed, the remaining hot water storage process is executed. However, a selection switch that can select whether or not to perform the remaining hot water notification is provided on the hot water storage remote controller R2, and the selection switch is turned on. Only when
It is also possible to configure and implement the notification of the remaining hot water. It is also possible to carry out without performing the remaining hot water notification as described above.

(4) In the first to third embodiments, after setting the heat pump operation start time, no special operation is performed between the normal operation start time and the heat pump operation start time, and the heat pump operation start time is set. Then, the hot water storage process, the hot water filling process, and the additional heating process were configured to be performed sequentially, but after setting the heat pump operation start time, the change in the state of the remaining hot water from the normal operation start time to the heat pump operation start time was performed. Accordingly, the heat pump operation start time may be configured and updated. In addition, after setting the heat pump operation start time, the remaining hot water state change detection process is executed between the normal operation start time and the heat pump operation start time. Based on the state of the remaining hot water, the required hot water filling amount is obtained again, and the heat pump operation start time corresponding to the required hot water filling amount is updated.

(5) In the first to third embodiments described above, the heating unit 3 is provided with the heat pump type heating unit 3a as the main heating unit and the auxiliary heating unit 3b or the auxiliary heating device 30 as the auxiliary heating unit. Although shown, those provided with only the main heating means and those provided with only the auxiliary heating means,
The main heating means includes a heat pump type heating section 3a and an exhaust heat utilization type heating section for heating by using the exhaust heat of the external heat source device. The heating means includes heating means in the main heating means and the auxiliary heating means. And the respective configurations of the main heating means and the auxiliary heating means can be appropriately changed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hot water storage type hot water supply device according to a first embodiment.

FIG. 2 is a control block diagram of a hot water storage type hot water supply device.

[Fig. 3] Flow chart for reserved hot water filling operation

[Fig. 4] Flow chart for reserved hot water filling operation

FIG. 5 is a schematic configuration diagram of a hot water storage type hot water supply device according to a second embodiment.

FIG. 6 is a schematic configuration diagram of a hot water storage type hot water supply device according to a third embodiment.

[Explanation of symbols]

1 Hot water storage tank 3 heating means 3a Main heating means 3b, 30 auxiliary heating means 4 water supply channels 5 hot water supply passage 5b Hot water path 25,26 Remaining hot water detection means H operation control means

   ─────────────────────────────────────────────────── ─── Continued front page    (71) Applicant 000196680             Seibu Gas Co., Ltd.             1-1-17 Chiyo, Hakata-ku, Fukuoka City, Fukuoka Prefecture (71) Applicant 000135416             Harman Planning Co., Ltd.             3-2-1 Kasuga Minami, Konohana-ku, Osaka City, Osaka Prefecture             issue (72) Inventor, T. Suzuki             1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas             Within the corporation (72) Inventor Kenichi Tanogami             1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas             Within the corporation (72) Inventor Kazuya Yamaguchi             1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas             Within the corporation (72) Inventor Yoshitaka Kasahara             1-3 1-3 Kitakko Shiratsu, Konohana-ku, Osaka City, Osaka Prefecture             No. within Osaka Gas Co., Ltd. (72) Inventor Shin Iwata             1-3 1-3 Kitakko Shiratsu, Konohana-ku, Osaka City, Osaka Prefecture             No. within Osaka Gas Co., Ltd. (72) Inventor Keiji Takimoto             1-3 1-3 Kitakko Shiratsu, Konohana-ku, Osaka City, Osaka Prefecture             No. within Osaka Gas Co., Ltd. (72) Inventor Hiroshi Takagi             Aichi Prefecture Nagoya City Atsuta Ward Sakuradacho 19-18 East             Within Japan Gas Co., Ltd. (72) Inventor Kazuhiro Matsumoto             4 Nishi, Imagijuku Aoki, Nishi-ku, Fukuoka City, Fukuoka Prefecture             Department Gas Co., Ltd. (72) Inventor Yasuhito Hashizume             1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka             Harman Co., Ltd. (72) Inventor Toshihiro Kawauchi             1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka             Harman Co., Ltd. (72) Inventor Yasushi Fujikawa             1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka             Harman Co., Ltd. (72) Inventor Yoshio Fujimoto             1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka             Harman Co., Ltd. (72) Inventor Tomoya Sakiishi             1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka             Harman Co., Ltd. F term (reference) 3L024 CC05 CC06 DD03 DD14 DD17                       DD21 DD27 EE02 FF16 GG03                       GG05 GG06 GG12 GG22 GG32                       GG33 GG38 GG41 HH03 HH19                       HH22 HH26 HH52                 3L025 AA02 AA08 AA13 AA17

Claims (4)

[Claims] 1. A hot water storage tank having a hot water supply passage connected to an upper portion and a water supply passage connected to a lower portion, heating means for heating hot water in the hot water storage tank, and operation control means for controlling the operation of the heating means. And a hot water supply device provided with a hot water supply device, which branches from the hot water supply passage and supplies hot water in the hot water storage tank into the bathtub, and residual hot water for detecting the residual hot water in the bathtub. Detection means is provided, the operation control means, based on the detection information of the remaining hot water detection means, performs a remaining hot water determination process for determining the state of the remaining hot water in the bathtub, in the remaining hot water determination process, When it is determined that there is no remaining hot water in the bathtub, the normal operation start time before the hot water filling time is set so that the hot water storage amount in the hot water storage tank becomes the preset hot water filling time at the hot water filling setting time. When it comes to the above In order to start the operation of the heating means, a normal hot water storage process for controlling the operation of the heating means is executed, and when it is determined that there is residual hot water in the bath, based on the detection information of the residual hot water detecting means, Obtain a required amount of hot water that is smaller than the set amount of hot water, and set the amount of hot water in the hot water storage tank at the time of hot water filling to the required amount of hot water before the time of hot water filling. At the remaining hot water operation start time after the normal operation start time, a hot water storage type configured to execute a residual hot water hot water storage process for controlling the operation of the heating means in order to start the operation of the heating means. Water heater. 2. The heating means includes a main heating means and an auxiliary heating means, and the operation control means sets a total heating efficiency when the hot water for heating is set by the main heating means. The necessary operation time of the main heating means for exceeding the heating efficiency is stored, and in the remaining hot water storage treatment, the heating for setting the hot water storage amount in the hot water storage tank to the required hot water filling amount at the hot water filling setting time. The heating operation time of the means is determined, and it is determined whether the heating operation time is equal to or more than the required operation time or less, and if the heating operation time is equal to or more than the required operation time, only the main heating means is operated. When the heating operation time is shorter than the required operation time by controlling the operation of the heating means, the heating selection for controlling the operation of the heating means in a state where only the auxiliary heating means is operated. Hot water storage type water heater according to claim 1, which is configured to perform processing. 3. The operation control means, in the remaining hot water storage processing, based on the detection information of the remaining hot water detection means, in the bathtub between the normal operation start time and the remaining hot water operation start time. It is configured to execute a residual hot water state change detection process for detecting a change in the state of the residual hot water, and to execute the heating selection process when a change in the state of the residual hot water is detected in the residual hot water state change detection process. The hot water storage type hot water supply device according to claim 2. 4. When the operation control means determines in the remaining hot water determination process that there is remaining hot water in the bathtub, it performs remaining hot water notification for notifying that there is remaining hot water, and the remaining hot water notification is given. The hot water storage type hot water supply device according to any one of claims 1 to 3, which is configured to perform the remaining hot water hot water storage process when a canceling operation for canceling the hot water is performed.