JP2017227395A - Hot water storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage type water heater which sets a time zone for executing a boiling operation, and which can prevent hot water shortage while performing the boiling operation in a time zone according to lifestyle of a user.SOLUTION: A hot water storage type water heater includes: a hot water storage tank; heating means for heating water; and boiling control means for controlling a boiling operation for storing the hot water heated by the heating means in the hot water storage tank. The boiling control means sets a first time zone and a second time zone as time zones for executing the boiling operation. The boiling control means sets priority in these time zones so that the boiling operation at least in one period in the first time zone is performed preferentially over the boiling operation in the second time zone.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a hot water storage type water heater.

  Conventionally, for example, Patent Document 1 discloses a technique related to a water heater that performs a manually set boiling operation. More specifically, the hot water heater is configured to be able to manually set various operating conditions for forced boiling operation in order to flexibly cope with the user's lifestyle.

JP 2009-127870 A

  However, in the water heater of Patent Document 1 described above, the boiling operation is performed according to various operating conditions set by the user. For this reason, depending on the set boiling time, there is a possibility that the amount of boiling will be insufficient and hot water shortage may occur.

  The present invention has been made to solve the above-described problems, and in a hot water storage type water heater that sets a time zone for performing a boiling operation, it is heated in a time zone in accordance with a user's lifestyle. An object of the present invention is to provide a hot water storage type water heater that can prevent hot water shortage while performing a raising operation.

  A hot water storage type water heater according to the present invention comprises a hot water storage tank, a heating means for heating water, and a boiling control means for controlling a boiling operation for accumulating hot water heated by the heating means in the hot water storage tank, The boiling control means includes a means for setting a first time zone and a second time zone as a time zone for performing the boiling operation, and a boiling operation in at least one period of the first time zone is a second time zone. And a means for setting a priority order in the time zone so as to be prioritized over the boiling operation.

  According to the hot water storage type water heater of the present invention, the boiling operation is performed until the target boiling amount is reached in accordance with the priority order of a plurality of time zones. Thereby, it becomes possible to prevent running out of hot water while performing a heating operation in a time zone in accordance with the lifestyle of the user.

1 is a configuration diagram illustrating a hot water storage type water heater according to Embodiment 1. FIG. It is a schematic diagram of a remote control. FIG. 3 is a schematic diagram showing an example of setting a boiling time zone in the hot water storage type hot water supply apparatus of the first embodiment. FIG. 6 is a schematic diagram showing another example of setting a boiling time zone in the hot water storage type hot water supply apparatus of the first embodiment. 6 is a schematic diagram showing an example of setting a boiling time zone in a hot water storage type hot water supply apparatus according to Embodiment 2. FIG.

  Hereinafter, embodiments will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram illustrating a hot water storage type water heater according to a first embodiment. As shown in FIG. 1, the hot water storage type water heater 100 according to the first embodiment includes a tank unit 33 and a heat pump unit 7 configured to use a heat pump cycle. The heat pump unit 7 and the tank unit 33 are connected via a heat pump forward pipe 14, a heat pump return pipe 15, and an electric wiring (not shown). In addition, the tank unit 33 incorporates a control device 36 that controls the operation of the hot water storage type water heater 100. Various valves, pumps, and sensors included in the tank unit 33 and the heat pump unit 7 are connected to the control device 36 via electric wiring. The control device 36 is connected to the remote controller 50 so as to communicate with each other. The remote controller 50 will be described later. The control device 36 is constituted by, for example, a microcomputer. The control device 36 includes a storage unit including a ROM, a RAM, a nonvolatile memory, and the like, an arithmetic processing device (CPU) that executes arithmetic processing based on a program stored in the storage unit, and external to the arithmetic processing device. And an input / output port for inputting and outputting signals. Hereinafter, each component of the hot water storage type water heater 100 will be described.

  The heat pump unit 7 functions as a heating unit that heats the water guided from the tank unit 33. The heat pump unit 7 connects the compressor 1, the water refrigerant heat exchanger 3, the expansion valve 4, and the air heat exchanger 6 in a ring shape with a refrigerant circulation pipe 5 to constitute a heat pump cycle. The water-refrigerant heat exchanger 3 performs heat exchange between the refrigerant and the water guided from the tank unit 33. The heat pump forward temperature thermistor 39 is a temperature sensor for detecting the temperature of water before being heated by the water refrigerant heat exchanger 3, and is provided in the heat pump forward pipe 14. The heat pump return temperature thermistor 40 is a temperature sensor for detecting the temperature of the high-temperature water heated by the water / refrigerant heat exchanger 3, and is provided in the heat pump return pipe 15.

  The tank unit 33 incorporates the following various components and piping. The hot water storage tank 8 stores hot water by forming a temperature stratification in which the upper side is hot and the lower side is low. A water supply port 8 a provided at the lower part of the hot water storage tank 8 is connected to a third water supply pipe 9 c of a water supply pipe 9 for supplying low-temperature water which is city water. The water supply pipeline 9 will be described later. At the upper part of the hot water storage tank 8, a hot water introduction outlet 8d is provided. A hot water supply pipe 21 for supplying hot water stored in the hot water storage tank 8 to the outside of the water heater is connected to the hot water introduction outlet 8d. High temperature water heated using the heat pump unit 7 flows into the hot water storage tank 8 from the upper part of the tank, and low temperature water flows into the lower part of the tank through the third water supply pipe 9c. Hot water is stored so that a temperature difference occurs in the lower part. In order to detect the temperature distribution of the hot water in the hot water storage tank 8, a plurality of temperature sensors are installed on the surface of the hot water storage tank 8 at different heights. In the first embodiment, the upper remaining hot water temperature thermistor 42 is disposed in the upper region of the hot water storage tank 8, and the lower remaining hot water temperature thermistor 43 is disposed in the lower region of the hot water storage tank 8. May be attached to the hot water storage tank 8. The control device 36 grasps the amount of remaining hot water in the hot water storage tank 8 based on the temperature distribution acquired by these temperature sensors attached to the hot water storage tank 8.

  In addition, the circulation pump 12 and the bath heat exchanger 20 are built in the tank unit 33. The circulation pump 12 is a pump for circulating hot water through various pipes described later. The bath heat exchanger 20 is a heat exchanger for heating the fluid to be heated on the secondary side using high-temperature water supplied from the hot water storage tank 8 or the heat pump unit 7. In the first embodiment, as a secondary side configuration of the bath heat exchanger 20, an explanation will be given by taking, as an example, a bathing pipe 27 and a bathing return pipe 28 for circulating hot water in the bath 30. The bath heat exchanger 20 is connected to the bathtub 30 through a bath piping 27 and a bath return piping 28, thereby forming a circulation path. A bath circulation pump 29 for circulating the bath water and a bath return temperature thermistor 38 for detecting the temperature of the bath water discharged from the bath 30 are installed in the bath return pipe 28. A bath temperature thermistor 37 for detecting the temperature of the bath water after the heat exchange from the bath heat exchanger 20 is installed in the middle of the bath piping 27.

  Next, valves and piping provided in the tank unit 33 will be described. The tank unit 33 has a three-way valve 11 and a four-way valve 18. The three-way valve 11 is a flow path switching means having two ports, a port and b port, through which hot water flows in, and c port, which is one outlet through which hot water flows out, and is either a port or b port. The hot water path can be switched so that hot water flows in from the water. The four-way valve 18 has b port and c port which are two inlets through which hot water flows, and a port and d port which are two outlets through which hot water flows out. The four-way valve 18 is configured to be able to switch the flow path form among four paths, that is, an ab path, an ac path, a bd path, and a cd path.

  The tank unit 33 includes a water outlet pipe 10, a hot water supply pipe 13, a first bypass pipe 16, a second bypass pipe 17, a hot water introduction pipe 20 a and a hot water outlet pipe 20 b that constitute a heat source side circuit. have.

  The water outlet port pipe 10 is a flow path that connects the water outlet port 8 b of the hot water storage tank 8 and the a port of the three-way valve 11. The hot water supply pipe 13 is a flow path that connects the d port of the four-way valve 18 and the hot water introduction outlet 8 d above the hot water storage tank 8. The heat pump outgoing pipe 14 is a flow path connecting the c port of the three-way valve 11 and the inlet side of the heat pump unit 7, and the heat pump return pipe 15 is connected to the outlet side of the heat pump unit 7 and the c port of the four-way valve 18. It is a flow path which connects. A circulation pump 12 is disposed in the middle of the heat pump outgoing pipe 14. The first bypass pipe 16 is a flow path that connects the a port of the four-way valve 18 and the hot water inlet 8 c provided between the central portion and the lower portion of the hot water storage tank 8 in the height direction. The second bypass pipe 17 is a flow path that branches from between the circulation pump 12 provided in the middle of the heat pump outgoing pipe 14 and the inlet side of the heat pump unit 7 and is connected to the b port of the four-way valve 18. The hot water introduction pipe 20 a is a flow path that branches from the middle of the hot water supply pipe 13 and is connected to the primary side inlet of the bath heat exchanger 20. The hot water outlet pipe 20 b is a flow path that connects the primary side outlet of the bath heat exchanger 20 and the b port of the three-way valve 11.

  The tank unit 33 further includes a first water supply pipe 9 a, a second water supply pipe 9 b, a hot water supply mixing valve 22, a bath mixing valve 23, a first hot water supply pipe 24, and a second hot water supply pipe 25. One end of the first water supply pipe 9 a is connected to a water source such as a water supply, and the other end of the first water supply pipe 9 a is connected to the second water supply pipe 9 b and the third water supply pipe 9 c via the pressure reducing valve 31. A water supply pipe 9 is constituted by the first water supply pipe 9a, the second water supply pipe 9b, and the third water supply pipe 9c. The second water supply pipe 9b is branched from the middle and connected to the hot water supply mixing valve 22 and the bath mixing valve 23, respectively. The hot water supply pipe 21 is branched from the middle and connected to the hot water supply mixing valve 22 and the bath mixing valve 23, respectively. An intermediate solenoid valve 26 for opening and closing the second hot water supply pipe 25 is provided in the middle of the second hot water supply pipe 25.

  The hot water mixing valve 22 and the bath mixing valve 23 adjust the flow rate ratio between the high temperature water supplied from the hot water supply pipe 21 and the low temperature water supplied from the second water supply pipe 9b. As a result, hot water having a set temperature set by the user with the remote controller 50 is generated and flows into the first hot water supply pipe 24 and the second hot water supply pipe 25, respectively. The hot water whose temperature is adjusted by the hot water supply mixing valve 22 is supplied from a first hot water supply pipe 24 to a faucet (not shown) such as a shower or a currant. On the other hand, the hot water whose temperature is adjusted by the bath mixing valve 23 is supplied from the second hot water supply pipe 25 to the bathtub 30 through the bath solenoid valve 26, the bath forward pipe 27, and the bath return pipe 28.

  The control device 36 of the hot water storage type hot water heater 100 shown in FIG. 1 has a function as a boiling control means for performing a boiling operation. The boiling operation is an operation for boiling water in the hot water storage tank 8 using the heat pump unit 7. During this boiling operation, the heat pump unit 7 and the circulation pump 12 are operated. The three-way valve 11 is controlled so that the a port communicates with the c port and the b port is closed. The four-way valve 18 is controlled so that the c port communicates with the d port and the a port and the b port are closed. In the boiling operation, the water derived from the water outlet 8b of the hot water storage tank 8 by the circulation pump 12 passes through the water outlet port 10, the three-way valve 11, and the heat pump outlet pipe 14, and the water refrigerant heat in the heat pump unit 7 is heated. It is sent to the exchanger 3. And the high temperature water heated with the water-refrigerant heat exchanger 3 in the heat pump unit 7 flows into the hot water storage tank 8 from the hot water introduction outlet 8d through the heat pump return pipe 15, the four-way valve 18, and the hot water supply pipe 13. By performing such a boiling operation, high temperature water is stored from the upper layer inside the hot water storage tank 8, and the high temperature water layer gradually becomes thicker.

  The hot water storage type water heater 100 shown in FIG. The remote controller 50 is installed in a bathroom or kitchen, for example, and is connected to the control device 36 via a communication line. FIG. 2 is a schematic diagram of the remote controller 50. As shown in this figure, the remote controller 50 includes an operation button 51, a display unit 52, and a speaker 53. The operation button 51 is used to set a heating time zone and a priority order to be described later.

  Next, the characteristic operation of the hot water storage type water heater 100 of the first embodiment will be described. The hot water storage type hot water heater 100 according to the first embodiment is characterized in that a user has a configuration for manually setting a boiling time zone and a configuration for setting a priority order for the set boiling time zone. Have. FIG. 3 is a schematic diagram showing an example of setting of a boiling time zone in hot water storage type hot water heater 100 of the first embodiment.

  The user operates the operation button 51 of the remote controller 50 to set the boiling time zone. In the example shown in FIG. 3, the boiling time zone A as the first time zone is set in the time zone from 1 o'clock to 4 o'clock, and the boiling time zone as the second time zone is set in the time zone between 8 o'clock and 11 o'clock. B is set. In addition, in this figure, the example in which two boiling time zones are set is shown, but three or more boiling time zones may be set.

  In addition, the user operates the operation button 51 of the remote controller 50 to set the priority order of the set boiling time zones A and B. In the example shown in FIG. 3, the boiling time zone A is set to a high priority time zone with a high priority, and the boiling time zone B is set to a low priority time zone with a lower priority than the boiling time zone A. Yes.

  The controller 36 performs the boiling operation so that the boiling amount, which is the amount of heat accumulated in the hot water storage tank 8, reaches the target boiling amount during the boiling time period set by the user. Do. At this time, the control device 36 first performs the boiling operation in the boiling time zone A in accordance with the priority order set by the user. Then, when the amount of boiling does not reach the target amount of boiling in the heating operation in the boiling time zone A, the boiling operation is performed in the boiling time zone B next.

  As described above, according to the hot water storage type water heater 100 of the first embodiment, since the boiling operation is performed in the boiling time zone set by the user, in the time zone in accordance with the lifestyle of the user. Boiling operation is possible. Further, according to hot water storage type hot water heater 100 of the first embodiment, when the target boiling amount is not reached by the heating operation in the boiling time zone A, the boiling operation is performed in the boiling time zone B. Therefore, it is possible to prevent running out of hot water.

  FIG. 4 is a schematic diagram showing another example of setting the boiling time zone in hot water storage type hot water heater 100 of the first embodiment. In the example shown in FIG. 4, the boiling time zone C as the first time zone is set in the time zone from 0 o'clock to 6 o'clock, and the boiling time zone as the second time zone is set in the time zone between 16:00 and 19:00 D is set. In the example shown in FIG. 4, the boiling time zone C is set to a high priority time zone having a high priority, and the boiling time zone D is set to a low priority time zone having a lower priority than the boiling time zone C. Has been.

  The control device 36 first performs the boiling operation in the boiling time zone C according to the priority set by the user. At this time, when the boiling amount reaches the target boiling amount during the time period C of the boiling time zone C, the control device 36 ends the boiling operation and raises the boiling time in the subsequent boiling time zone D. Control not to drive.

  According to such control, since unnecessary boiling operation can be avoided, energy efficiency can be improved.

  By the way, in the hot water storage type water heater of Embodiment 1 mentioned above, when the amount of boiling does not reach the target boiling amount in the heating operation in the boiling time zone A, the user is notified of that. It is preferable to provide the configuration of the notification means. As a configuration of such a notification means, for example, the display unit 52 of the remote controller 50 may be heated in the boiling time zone B because there is a concern that hot water runs out only in the boiling time zone A. It is possible to apply a configuration that displays a text indicating that the operation is to be performed. In addition, a configuration may be applied in which the same content as the text of the display is notified from the speaker 53 of the remote controller 50 by voice. This also applies to the hot water storage type water heater of Embodiment 2 described later.

  Further, the hot water storage type water heater 100 according to the first embodiment described above may have a configuration as display means for displaying the amount of boiling that can be heated in the set boiling time zone on the display unit 52 of the remote controller 50. Is preferred. Thus, by notifying the user of information related to the boiling operation, the user's sensitivity to running out of hot water can be increased, so that the concern about running out of hot water can be eliminated. This also applies to the hot water storage type water heater of Embodiment 2 described later.

  Further, the hot water storage type water heater of the first embodiment described above may be configured such that the heating operation schedule for the day is set in advance based on the target boiling amount. In this case, the control device 36 calculates the target boiling amount on the boiling day based on the remaining amount of hot water on the previous day and the past history of the amount of hot water used per day. And the control apparatus 36 calculates the time required in order to boil up the target boiling amount, and assigns the time slot | zone which performs boiling operation in an order from the boiling time slot | zone with a high priority. According to such control, the target boiling amount for the day can be reliably boiled, so that hot water shortage can be effectively prevented.

Embodiment 2. FIG.
Next, a second embodiment will be described. In the second embodiment, the difference from the first embodiment will be mainly described, and the description of the same or corresponding parts will be simplified or omitted.

  The hot water storage type hot water heater of the second embodiment has the same configuration as the hot water storage type hot water heater 100 of the first embodiment. However, in the hot water storage type water heater 100 according to the second embodiment, when the user selects to give priority to the power charge, in addition to the priority order of the boiling time zone set by the user himself, the time of the power charge The priority of the boiling time period is determined based on the band-specific information.

  FIG. 5 is a schematic diagram showing an example of setting a boiling time zone in hot water storage type hot water heater 100 of the second embodiment. In the example shown in FIG. 5, the user sets the boiling time zone E as the first time zone in the time zone from 0 o'clock to 6 o'clock, and the boiling as the second time zone in the time zone between 16:00 and 20:00 The raising time zone F is set. In the example shown in FIG. 5, the user sets the boiling time zone E to a high priority time zone having a high priority, and the boiling time zone F is a low priority time having a lower priority than the boiling time zone E. Set to obi.

  Moreover, the hot water storage type water heater 100 according to the second embodiment stores information on power rates according to time zones. In addition, with the liberalization of electric power, there are multiple power charge systems for each company. For this reason, it is desirable that the hot water storage type hot water heater 100 has a configuration in which the plurality of power charge systems are stored and the user selects a target power charge system. Moreover, when the hot water storage type hot water heater 100 is connected to an external information acquisition means such as a HEMS (Home Energy Management System), it is possible to automatically acquire information such as a power charge system contracted via the HEMS. Good.

  5 shows an example of the power charge system acquired by the above-described method. In the example shown in this figure, the high charge time zone G is the time zone with the highest charge, the low charge time zone H is a time zone where the charge is lower than the high charge time zone G, and the low charge time zone J is a time zone in which the charge is lower than the low charge time zone H.

  As shown in (a) of FIG. 5, the control device 36 first performs the boiling operation in the time zone W1 belonging to the low charge time zone J in the range of the boiling time zone E according to the priority set by the user. I do. At this time, when the boiling amount reaches the target boiling amount in the time zone W1, the controller 36 ends the boiling operation and performs the boiling operation in the subsequent boiling time zone. Control to not.

  If the boiling amount does not reach the target boiling amount in the time zone W1, the control device 36 then selects the time belonging to the low charge time zone H within the boiling time zone F. A boiling operation is performed in the belt W2. At this time, when the boiling amount reaches the target boiling amount in the time zone W2, the control device 36 ends the boiling operation and performs the boiling operation in the subsequent boiling time zone. Control to not. According to such control, it becomes possible to perform the boiling operation with priority on the low charge time zone in the set boiling time zone.

  In addition, when the hot water storage type water heater 100 is configured to set the schedule for the heating operation on the day in advance, the time zone for performing the heating operation may be assigned as follows. More specifically, as shown in FIG. 5 (b), the control device 36 calculates the time required to boil up the target boiling amount on the day of boiling, and the time zone W1 and the time zone W2 are calculated. Allocate time zones for boiling operation. Then, when the heating of the target boiling amount is not completed only in these time zones W1 and W2, the time zone W3 belonging to the high charge time zone G and the boiling time zone F in the range of the boiling time zone E In this range, the time zone in which the boiling operation is performed is sequentially assigned to the time zone W4 belonging to the high charge time zone G. According to such control, it becomes possible to perform the boiling operation with priority on the low charge time zone in the set boiling time zone.

  In addition, the boiling operation may not be performed in the boiling time zones E and F for some reason. Further, the boiling amount may not reach the target boiling amount due to the boiling operation in the boiling time zones E and F. In these cases, it is preferable that the control device 36 performs the boiling operation automatically in a low charge time zone outside the boiling time zone. More specifically, as shown in (c) of FIG. 5, the control device 36 performs the boiling time zone when the boiling amount in the time zone W1 and the time zone W2 has not reached the target boiling amount. The boiling operation is performed in the time zone W5 belonging to the low charge time zone H among the time zones outside the E and F hours. According to such control, hot water shortage can be prevented while giving priority to the low fee period.

  In addition, when the hot water storage type water heater 100 has a configuration in which a heating operation schedule on the day of boiling is set in advance, a time zone for performing the heating operation may be assigned as follows. More specifically, as shown in FIG. 5 (d), the control device 36 performs the boiling operation for the time zone W1 and the time zone W2 based on the boiling time required on the day of boiling. Assign time zones in order. Further, when the boiling time is insufficient in these time zones W1 and W2, the control device 36 sequentially boiles the time zones W3 and W4 which are the range of the boiling time zone and the high charge time zone G. Allocate a time zone for the lift operation. Further, if the boiling time is still insufficient even after the boiling operation is assigned to these time zones W3 and W4, the control device 36 is outside the boiling time zone and the low charge time zone H. A time zone for performing the boiling operation is assigned to the time zone W5. Furthermore, if the boiling time is still insufficient even after the heating operation is assigned to the time zone W5, the control device 36 is in a time zone that is outside the boiling time zone and in the high charge time zone G. A time zone for performing the boiling operation is assigned to W6. According to such control, hot water shortage can be prevented while giving priority to the low fee period.

  Control device 36 included in hot water storage type hot water supply apparatus 100 according to Embodiments 1 and 2 may be configured as follows. Each function of the control device may be realized by a processing circuit. The processing circuit of the control device may comprise at least one processor and at least one memory. When the processing circuit includes at least one processor and at least one memory, each function of the control device may be realized by software, firmware, or a combination of software and firmware. At least one of the software and the firmware may be described as a program. At least one of the software and firmware may be stored in at least one memory. The at least one processor may realize each function of the control device by reading and executing a program stored in at least one memory. The at least one memory may include a nonvolatile or volatile semiconductor memory, a magnetic disk, or the like.

  The processing circuit of the control device may include at least one dedicated hardware. When the processing circuit includes at least one dedicated hardware, the processing circuit may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-). (Programmable Gate Array) or a combination thereof. The function of each part of the control device may be realized by a processing circuit. Further, the functions of the respective units of the control device may be collectively realized by a processing circuit. Some of the functions of the control device may be realized by dedicated hardware, and the other part may be realized by software or firmware. The processing circuit may realize each function of the control device by hardware, software, firmware, or a combination thereof.

7 Heat Pump Unit, 8 Hot Water Storage Tank, 33 Tank Unit, 36 Control Device, 50 Remote Control, 51 Operation Button, 52 Display Unit, 53 Speaker, 100 Hot Water Storage Water Heater

Claims (6)

A hot water storage tank,
Heating means for heating water;
A boiling control means for controlling a boiling operation for accumulating hot water heated by the heating means in the hot water storage tank,
The boiling control means includes
Means for setting a first time zone and a second time zone as a time zone for performing the boiling operation;
Means for setting a priority in the time period such that the boiling operation in at least one period of the first time period has priority over the boiling operation in the second time period;
A hot water storage type water heater characterized by comprising.   The boiling control means is configured not to perform the boiling operation in the second time zone when the boiling amount reaches a target boiling amount by the boiling operation in the first time zone. The hot water storage type water heater according to claim 1, wherein the hot water storage type water heater is provided.   The said boiling control means is further provided with the alerting | reporting means which alert | reports when the amount of boiling does not reach | attain the target boiling amount by the said boiling operation of the said 1st time slot | zone. 2. A hot-water storage water heater according to 2.   4. The display device according to claim 1, further comprising display means for displaying a boiling amount that can be heated when the boiling operation is executed in the first time zone or the second time zone. The hot water storage type water heater according to claim 1. Based on the information for each time zone of the power rate, further comprising means for acquiring a high rate time zone where the power rate is high and a low rate time zone where the power rate is lower than the high rate time zone,
The boiling control means includes
Of the first time zone and the second time zone, a time zone belonging to the low charge time zone is given priority over the high charge time zone, and the boiling operation is performed. The hot water storage type hot water supply device according to any one of claims 1 to 4. Based on information on time periods of power charges, further comprising means for acquiring a high charge time period when the power charge is high and a low charge time period lower than the high charge time period,
When the boiling amount does not reach the target boiling amount due to the first time zone and the second time zone, the boiling control means is configured to reduce the first time zone and the The hot water storage type hot water supply device according to any one of claims 1 to 5, wherein the boiling operation is automatically performed in a time zone that does not belong to the second time zone.

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