JP3837367B2 - Hot water storage type hot water supply apparatus and operation method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water storage type hot water supply apparatus and an operation method thereof, and more particularly, to a hot water storage type hot water supply apparatus that uses electric power in a night time zone based on an electric lamp contract according to seasons and a driving method thereof.
[0002]
[Prior art]
A hot water storage type hot water supply apparatus includes a tank unit having a hot water or a hot water storage tank that can store water, a heat source unit that can heat the hot water or water in the hot water storage tank, and a control device that controls the operation of the heat source unit, etc. And is configured. In this type of hot water storage type hot water supply apparatus, there is one in which the control device operates a heat source unit during night hours based on an electric lamp contract classified by season and stores hot water in a hot water storage tank.
[0003]
[Problems to be solved by the invention]
However, in the hot water storage type hot water supply apparatus described above, the time is measured by an internal timer provided in the control device and provided with an oscillator. Therefore, the accumulation of errors in the time measured by the internal timer increases over many years. May end up.
[0004]
In addition, the internal power timer is timed by the backup power supply in the event of a power failure, but the time error becomes large in the timekeeping operation of the internal timer using this backup power supply, and in this case, the accumulation of time error may increase. There is.
[0005]
When the accumulation of time error in the internal timer increases as described above, the heat source unit may be operated outside the night time zone based on the seasonal lighting contract by time zone, and the power usage fee will rise There is.
[0006]
Furthermore, the initial setting of the internal timer is performed after the hot water storage type hot water supply apparatus is installed. However, this time setting work is cumbersome, and even if it is set incorrectly, the heat source unit may be operated outside the nighttime hours based on the lighting contracts by season. There are cases where prices rise.
[0007]
An object of the present invention is to provide a hot water storage type hot water supply apparatus and a method for operating the hot water storage apparatus that can reduce the power usage fee based on the electric lamp contract according to the season and the time zone.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 controls the operation of a tank unit including a hot water or a hot water storage tank capable of storing water, a heat source unit capable of heating the hot water or water in the hot water storage tank, and the heat source unit. in hot water storage type water heater and a control device for said control device includes a time taken from the time data of the long wave standard time radio wave, and a data based on previously stored seasonal time zone lamp contract basis, nighttime power Is used to operate the heat source unit, and based on the date taken from the time data of the long wave standard time radio wave, the amount of hot water stored in the tank unit is the amount of hot water stored in summer when the amount of hot water stored is other than summer. and it is characterized in the this increase or decrease to be more.
[0010]
According to a second aspect of the present invention, in the first aspect of the present invention, the control device includes a detection circuit capable of detecting a long wave standard time radio wave.
[0011]
According to a third aspect of the present invention, in the first aspect of the present invention, the remote controller connected to the control device is provided with a detection circuit capable of detecting a long wave standard time radio wave, and the time of the detected radio wave is detected. The data can be transmitted to the control device.
[0012]
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the control device is provided in a tank unit.
[0013]
The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the heat source unit includes a compressor, a heat pump heat exchanger, a refrigerant-to-water heat exchanger , and a water-to-water heat exchanger. A heat pump capable of heating water or hot water with refrigerant heat by the refrigerant- to-water heat exchanger and capable of heating water or hot water with hot water stored in the tank unit by the water-to-water heat exchanger It is characterized by being a unit.
[0014]
According to a sixth aspect of the present invention, there is provided a method for operating a hot water storage type hot water supply apparatus having a tank unit having hot water or a hot water storage tank capable of storing water and a heat source unit capable of heating the hot water or water in the hot water storage tank. in the time taken from the time data of the long wave standard time radio wave, based on the data based on previously stored seasonal hourly lamp contract, performs the operation of the heat source unit by using the night power, the based on the date taken from the long wave standard time radio wave of time data, the amount of hot water storage that accumulated in the tank units, in which hot water storage amount in the summer and said Rukoto is increased or decreased so as to be larger than amount of hot water storage in the non-summer is there.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 shows a heat pump type hot water supply apparatus to which an embodiment of a hot water storage type hot water supply apparatus according to the present invention is applied, and is a circuit diagram for heating water in a hot water storage tank and storing hot water in the tank. is there.
[0018]
As shown in FIG. 1, the heat pump type hot water supply apparatus 10 includes a heat pump unit 11 as a heat source unit, a hot water storage unit 12, a faucet 13, a bathtub 14, and control devices 15A and 15B.
[0019]
The heat pump unit 11 includes a compressor 16, a hot water storage heat exchanger (refrigerant-to-water heat exchanger) 27, a heat pump heat exchanger 18, and an accumulator 17 that are sequentially arranged in a refrigerant pipe 19. The compressor 16 compresses the refrigerant. The hot water storage heat exchanger 27 heats hot water or water by the heat of the refrigerant discharged from the compressor 16. In this embodiment, the refrigerant is a natural refrigerant such as a refrigerant containing a large amount of carbon dioxide. In the case of a refrigerant containing a large amount of carbon dioxide, the refrigerant pressure is usually higher than that of a fluorocarbon refrigerant.
[0020]
The hot water storage unit 12 includes a hot water storage tank 26, a bath heat exchanger (water-to-water heat exchanger) 28, a faucet hot water supply line 71, a bath pouring line 72, and the like.
[0021]
The hot water storage tank 26 stores hot water heated by refrigerant heat using a hot water storage heat exchanger 27. The hot water storage tank 26 and the hot water storage heat exchanger 27 are connected in a loop by a hot water storage water pipe 36 including a hot water storage circulation pump 34, a flow rate adjusting valve 35, and a first switching electromagnetic valve 73. When the valve 73 is opened, as shown by the thick line in FIG. 1, a hot water supply water circulation circuit N for circulating water is configured.
[0022]
When a refrigerant containing a large amount of carbon dioxide is used as the refrigerant, as described above, the refrigerant pressure becomes higher than that of the chlorofluorocarbon refrigerant, and the temperature of the hot water stored in the hot water storage heat exchanger 27 reaches about 90 ° C. To rise.
[0023]
Since the heat pump unit 11 and the hot water storage unit 12 are connected in a loop by the hot water storage water pipe 36, the high-pressure refrigerant pipe (for example, the refrigerant pipe 19) is not exposed to the outside, and the safety of the heat pump hot water supply apparatus is ensured. The
[0024]
A first tap water pipe 38 provided with a pressure reducing check valve 37 is connected to the bottom portion 26 </ b> B of the hot water storage tank 26 so that tap water can be always supplied into the hot water storage tank 26. Therefore, tap water pressure always acts in the hot water storage tank 26. The top 26A of the hot water storage tank 26 is connected to a top hot water discharge pipe 40 having a pressure relief valve 39. The intermediate portion 26C between the top 26A and the bottom 26B of the hot water storage tank 26 is connected to an intermediate hot water. A pipe 33 is connected, and a mixing valve 100 such as a wax valve is disposed at a junction between the hot water pipes 33 and 40.
[0025]
When hot water or water in the bottom portion 26B of the hot water storage tank 26 is supplied to the hot water storage heat exchanger 27 by the operation of the hot water storage circulation pump 34, the hot water storage heat exchanger 27 supplies the supplied hot water or water. The heat of the refrigerant gas discharged from the compressor 16 of the heat pump unit 11 is heated. When the first switching solenoid valve 73 is opened, the heated hot water or water is adjusted in flow rate by the flow rate adjusting valve 35 and guided to the top portion 26A of the hot water storage tank 26, and has an upper limit of about 90 ° C. in the hot water storage tank 26. Hot water can be stored.
[0026]
The pressure relief valve 39 releases the pressure when hot water or water is excessively heated and the pressure in the hot water storage tank 26 becomes excessive.
[0027]
The bathtub heat exchanger 28 is a water-to-water heat exchanger that circulates hot water in the hot water storage tank 26 to replenish hot water in the bathtub 14. Hot water in the hot water storage tank 26 is pumped out by driving the pump 102 in the circulation pipe 101 led out from the top portion 26A. The pumped hot water is led to the heat exchanger 28 for the bathtub through the circulation pipe 101, and after the hot water or water in the bathtub 14 is heated (repels), the second switching solenoid valve 74 and the return pipe 103 are connected. Then, the hot water storage tank 26 is returned to the intermediate portion 26C between the top portion 26A and the bottom portion 26B.
[0028]
In other words, the bathtub heat exchanger 28 is brought into contact with the introduction water pipe 75 that guides the hot water in the hot water storage tank 26 and the first bathtub water pipe 51 that guides the hot water or water in the bathtub 14. And the hot water or water respectively flowing through the first bathtub water pipe 51 is configured to be able to exchange heat. The introduction water pipe 75 and the first bathtub water pipe 51 are formed in a flat tube shape in the portion constituting the bathtub heat exchanger 28 and the contact area is increased.
[0029]
The first bathtub water pipe 51 communicating the bathtub heat exchanger 28 and the bathtub 14 includes a bathtub circulation pump 46, a filter 47, a water level sensor 48, a thermistor 49, and a flow switch 50. This first bathtub water pipe 51 constitutes a bathtub water circulation circuit P in which hot water or water circulates between the bathtub heat exchanger 28 and the bathtub 14.
[0030]
Since the water level sensor 48 communicates with the bathtub 14 via the first bathtub water pipe 51, the water level sensor 48 detects the level of hot water or water in the bathtub 14. Further, the thermistor 49 detects the hot water temperature when the hot water or water is circulating in the bathtub water circulation circuit P, and indirectly detects the hot water temperature in the bathtub 14. Moreover, the flow switch 50 detects that hot water or water is circulating in the water circulation circuit P for bathtubs. Further, the filter 47 filters hot water together with the filter 56 disposed in the bathtub 14.
[0031]
As described later, hot water is poured into the bathtub 14 to fill the bathtub 14, and when the hot water in the bathtub 14 is replenished, the circulation pump 102 and the bathtub circulation pump 46 are operated. Then, as shown by the thick line in FIG. 4, the hot water in the hot water storage tank 26 and the hot water in the bathtub 14 flow into the bathtub heat exchanger 28, where heat is exchanged. The hot water in the hot water storage tank 26 is chased away. The hot water worked in the bathtub heat exchanger 28 is lowered to about 50 ° C. by the heat exchange, and flows into the intermediate portion 26C of the hot water storage tank 26 through the water pipe 103.
[0032]
The faucet hot water supply line 71 includes a hot water supply pipe 59, a mixing control valve 57, and a flow sensor 58, as shown by a thick line Q in FIG.
[0033]
Since the tap water pressure acts on the hot water storage tank 26 via the first tap water pipe 38, the hot water in the hot water storage tank 26 can be supplied to the tap 13 by opening the tap 13. The flow sensor 58 detects the amount of hot water flowing through the hot water supply pipe 59. Further, the mixing control valve 57 is connected to the downstream side of the pressure reducing check valve 37 of the first tap water pipe 38 through the second tap water pipe 62 as shown by a thick line R in FIG.
[0034]
Therefore, by controlling the opening degree of the mixing control valve 57, the hot water from the hot water supply pipe 59 and the tap water from the second tap water pipe 62 are mixed, and the hot water supplied from the faucet 13 is about 60 ° C. or less, for example 42 Adjusted to ° C.
[0035]
As shown by the thick line S in FIG. 3, the bathtub pouring line 72 has a second passage between the downstream side of the flow sensor 58 in the hot water supply pipe 59 and between the bathtub circulation pump 46 and the flow switch 50 in the first bathtub water pipe 51. The hot water in the hot water storage tank 26 can be poured into the bathtub 14 by being connected by the bathtub water pipe 68. In the second bathtub water pipe 68, a flow sensor 64, a pouring electromagnetic valve 65, a relief means 66, a check valve 67, and an electromagnetic valve 54 are sequentially arranged from the hot water supply pipe 59 side.
[0036]
Here, the flow sensor 64 detects the amount of hot water flowing in the second bathtub water pipe 68. The relief means 66 and the check valve 67 release pressure when excessively heated hot water flows through the second bathtub water pipe 68. The solenoid valve 54 is opened when pouring water into the bath and is closed when reheating.
[0037]
When the hot water solenoid valves 65 and 54 are opened while the bathtub circulation pump 46 is stopped, the hot water in the hot water storage tank 26 becomes part of the hot water supply pipe 59 and The second bathtub water pipe 68 flows into the first bathtub water pipe 51 and is poured into the bathtub 14 through the flow switch 50, the thermistor 49, the water level sensor 48, and the filter 47 in the first bathtub water pipe 51. .
[0038]
When the water level sensor 48 detects that an appropriate amount of hot water has been poured into the bathtub 14 from the hot water storage tank 26, the hot water solenoid valves 65 and 54 are closed. Thereafter, when the thermistor 49 detects that the hot water temperature in the bathtub 14 has fallen below the appropriate temperature, the hot water or water in the bathtub 14 is heated (refreshed) as described above, and the hot water in the bathtub 14 is heated. Is kept warm.
[0039]
In this way, an operation in which an appropriate amount of hot water is poured from the hot water storage tank 26 into the bathtub 14 and then the hot water in the bathtub 14 is heated to an appropriate temperature for a predetermined time (refreshing) is called a bath automatic operation. .
[0040]
In the present embodiment, since the refrigerant circuit using the natural refrigerant is provided, the temperature of the hot water stored in the hot water storage tank 26 rises to about 90 ° C. as compared with the refrigerant circuit using the chlorofluorocarbon refrigerant. According to this, by circulating the hot water in the hot water storage tank 26, the hot water in the bathtub 14 can be replenished with this hot water temperature.
[0041]
The control device 15A is installed in the heat pump unit 11, and controls the operation (including capacity control) and stop of the compressor 16. Further, the control device 15B is installed in the hot water storage unit 12 to operate or stop the hot water circulation pump 34 and the bath circulation pump 46, the first switching electromagnetic valve 73, the second switching electromagnetic valve 74, and the pouring electromagnetic valve. The opening and closing of the flow control valve 35 and the mixing control valve 57 are controlled.
[0042]
The control device 15B is connected to the control device 15A of the heat pump unit 11 by a communication line 78, and bidirectional communication can be performed. Therefore, the operation of the heat pump unit 11, for example, the operation of the compressor 16 of the heat pump unit 11 is controlled by the control device 15B of the tank unit 12 via the control device 15A of the heat pump unit 11.
[0043]
Further, a kitchen remote controller (kitchen remote controller) 79 and a bath remote controller (bath remote controller) 80 are connected to the control device 15B in a wired or wireless state. The kitchen remote controller 79 or the bath remote controller 80 controls the above devices (for example, the compressor 16 and the hot water circulation pump 34) in the heat pump unit 11 or the tank unit 12 through the control device 15A or 15B. .
[0044]
As shown in FIG. 5, the control device 15B includes a microcomputer 81, a long wave standard time radio wave detection circuit 82, a sensor input circuit 83, a driver circuit 84, and a communication circuit 90. The microcomputer 81 includes a CPU 113, an internal timer 114, a ROM 115, and a RAM 116.
[0045]
The microcomputer 81 of the control device 15B is configured to be able to communicate with the kitchen remote controller 79 and the bath remote controller 80 using the communication circuit 90 as described above. The sensor input circuit 83 outputs temperature data from a plurality of temperature sensors installed in the vertical direction of the hot water storage tank 26 to the microcomputer 81, for example. Further, the driver circuit 84 drives the hot water supply circulation pump 34, the flow rate control valve 35, and the like according to a command signal from the microcomputer 81.
[0046]
The long wave standard time radio wave detection circuit 82 detects and receives a long wave standard time radio wave every 24 hours, for example, and transmits time data (time code) in the radio wave to the internal timer 114 of the microcomputer 81. The internal timer 114 measures 24 hours. When the time data is received from the long wave standard time radio wave detection circuit 82, the internal timer 114 determines the date, day of the week, time, etc. from the time data, Correct the day of the week, time, etc. When the long wave standard time radio wave detection circuit 82 detects a long wave standard time radio wave every 60 seconds, the internal timer 114 receives time data in the radio wave and corrects its own time, etc. The time measurement for 60 seconds is executed.
[0047]
Here, the initial time setting of the internal timer 114 is based on the time data in the long wave standard time radio wave detected by the long wave standard time radio wave detection circuit 82 when the power is turned on after the installation work of the heat pump hot water supply apparatus 10 is completed. The internal timer 114 is configured to automatically set its own date, day of the week, and time.
[0048]
In addition, the ROM 115 stores in advance data on the lighting contracts by season and time zone signed with the power company. As shown in FIG. 7, the lighting contract by season is divided into the start time and end time of each time zone of daytime, morning and evening hours, and nighttime hours, and unit electric energy per time zone. The power usage fee is displayed. Among these, in the daytime hours, the electricity usage charges are set differently in the summer and other seasons. The power usage fee is set to be lower in order of A in the daytime period in summer, B in the daytime period in other seasons, C in the morning and evening hours, and D in the nighttime periods. In addition, the start date and end date of the summer season and other seasons are also displayed in the lamp contracts by season.
[0049]
Further, the CPU 113 of the microcomputer 81 shown in FIG. 5 uses the date (season), day of the week, and time of the internal timer 114 corrected by the time data of the long wave standard time radio wave, and the electric light according to the seasons stored in the ROM 115. The operation of the heat pump unit 11 is controlled based on the data based on the contract. In other words, the CPU 113 compares the date (season), day of the week, and time obtained by correcting the time data of the long wave standard time radio wave with the internal timer 114 with the data of the lighting contract according to the season according to the season in the ROM 115. The operation pattern of the heat pump unit 11 that uses is changed for each season, and the amount of hot water stored in the hot water storage tank 26 is controlled to increase or decrease for each season.
[0050]
Furthermore, the operation pattern of the heat pump unit 11 by the CPU 113 of the microcomputer 81 in the control device 15B will be described in detail. In a household that uses an average of 200 liters of hot water per day, in the summer when the electricity usage fee is high during the daytime hours, 300 liters of hot water (e.g. ) Is boiled at night and stored in the hot water storage tank 26 to keep it warm, and this hot water is used during the daytime. Since there is a margin of 100 liters, it is possible to suppress the boiling of hot water by operating the heat pump unit 11 during the daytime.
[0051]
Similarly, in households that use an average of 200 liters of hot water a day, in the seasons other than the summer when the electricity usage fee for daytime hours is low, use electricity during the nighttime hours and allow for a margin of 50 liters. Hot water (for example, 85 ° C.) is boiled at night, stored in the hot water storage tank 26, and kept warm. When there is demand for hot water exceeding the surplus amount during the daytime, the heat pump unit 11 is operated to boil hot water each time. Thus, since the amount of hot water stored in the hot water storage tank 26 is reduced compared to the summer, waste of power consumption for heat insulation is suppressed.
[0052]
The kitchen remote controller 79 includes an operation unit 91 and a display unit 92. The operation unit 91 includes a hot water supply operation switch 93, a hot water supply temperature increase switch 94, a hot water supply temperature decrease switch 95, a day of the week switch 96, and an operation switch. 97, a hot water storage amount raising switch 98 and a hot water storage amount lowering switch 99 are arranged. Further, as shown in FIG. 6, the kitchen remote controller 79 is configured such that the microcomputer 110 inputs signals from the switches 93 to 99 and changes the display on the display unit 92 via the driver circuit 111. As described above, the communication circuit 112 is provided so as to be able to communicate with the control device 15B.
[0053]
With the configuration as described above, the following effects (1) to (4) are achieved according to the above embodiment.
[0054]
(1) Using the time data in the long wave standard time radio wave detected by the long wave standard time radio wave detection circuit 82 of the control device 15B, the internal timer 114 of the microcomputer 81 sequentially corrects its own date (season), day of the week, and time. Thus, accumulation of time errors in the internal timer 114 can be prevented. For this reason, the time of the internal timer 114 can be maintained with high accuracy at low cost.
[0055]
(2) The CPU 113 of the microcomputer 81 in the control device 15B operates the heat pump unit 11 in the night time zone using the date (season), day of the week, and time of the internal timer 114 maintained with high precision, and the hot water storage tank 26 Since the water or hot water inside is heated and boiled, it is possible to reliably prevent this night time zone from deviating from the night time zone in the data of the seasonal time zone lighting contract stored in the ROM 115 in advance. For this reason, since the usage charge of the electric power consumed at the time of the heating operation of the hot water or the water in the hot water storage tank 26 by the heat pump unit 11 can be maintained at a low cost, the electric power usage charge based on the seasonal electric lamp contract can be reduced.
[0056]
{Circle around (3)} The microcomputer 81 of the control device 15B changes the operation of the heat pump unit 11 that uses nighttime electric power for each season, and increases or decreases the amount of hot water stored in the hot water storage tank 26 for each season. That is, in the summer, the amount of hot water stored in the hot water storage tank 26 is increased so that the hot water or water heating operation in the hot water storage tank 26 is surely prevented during the daytime period. The amount of hot water stored in the hot water storage tank 26 is reduced as compared with the case of summer, and the power consumption for keeping the hot water in the hot water storage tank 26 is reduced. Thereby, the electric power usage fee based on the lighting contract according to a season according to a season can be reduced.
[0057]
(4) When the power is turned on after the installation work of the heat pump type hot water supply apparatus 10 is completed, the internal timer 114 sets its own date (season) based on the time data in the long wave standard time radio wave detected by the long wave standard time radio wave detection circuit 82. Since the day of the week and time are automatically set, a time setting error in the internal timer 114 can be reliably prevented.
[0058]
As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.
[0059]
For example, the long wave standard time radio wave detection circuit 82 is not installed in the control device 15B, but is installed in the kitchen remote controller 79 and detected by the long wave standard time radio wave detection circuit 82 as shown in FIG. However, the communication circuit 112 of the kitchen remote controller 79 and the communication circuit 90 of the control device 15B may be used to transmit to the microcomputer 81 of the control device 15B.
[0060]
Moreover, although the case where the heat source unit is the heat pump unit 11 has been described in the above embodiment, it may be a boiler or the like.
[0061]
【The invention's effect】
According to the hot water storage type hot water supply apparatus according to the first to fifth aspects of the present invention, it is possible to reduce a power usage fee based on a seasonal electric lamp contract.
[0062]
According to the operation method of the hot water storage type hot water supply apparatus according to the sixth aspect of the present invention, it is possible to reduce the electric power usage fee based on the seasonal electric lamp contract.
[Brief description of the drawings]
FIG. 1 shows a heat pump type hot water supply apparatus to which an embodiment of a hot water storage type hot water supply apparatus according to the present invention is applied, and is a circuit diagram for heating water in a hot water storage tank and storing hot water in the tank. is there.
FIG. 2 is a circuit diagram when hot water is supplied to a faucet in FIG. 1;
FIG. 3 is a circuit diagram when pouring hot water into a bathtub in FIG. 1;
FIG. 4 is a circuit diagram when the hot water or water in the bathtub is heated (refreshed) and kept warm in FIG. 1;
FIG. 5 is a block diagram showing a control device 15B of FIG.
6 is a block diagram illustrating the kitchen remote controller of FIG. 1. FIG.
FIG. 7 is a chart showing data on a lighting contract by season and time zone stored in the ROM of FIG. 5;
[Explanation of symbols]
10 Heat pump type hot water supply device (hot water storage type hot water supply device)
11 Heat pump unit (heat source unit)
12 tank unit 15B control device 16 compressor 18 heat pump heat exchanger 26 hot water storage tank 27 hot water supply heat exchanger (refrigerant to water heat exchanger)
81 microcomputer 82 long wave standard time radio wave detection circuit 90 communication circuit 113 CPU
114 Internal timer 115 ROM

Claims (6)

Hot water storage hot water supply comprising a tank unit having a hot water or a hot water storage tank capable of storing water, a heat source unit capable of heating the hot water or water in the hot water storage tank, and a control device for controlling the operation of the heat source unit, etc. In the device
The control apparatus includes a captured from the time data of the long wave standard time radio wave time, based on the data based on previously stored seasonal hourly lamp contracts, by using the night power performs the operation of the heat source unit ,
Based on the date taken from the time data of the longwave standard time radio wave, hot water storage of the hot water storage amount accumulated in the tank unit, characterized that you increase or decrease so that the hot water storage amount in the summer is greater than hot water storage amount in the non-summer Water heater. The hot water storage hot water supply apparatus according to claim 1, wherein the control device includes a detection circuit capable of detecting a long wave standard time radio wave . The remote controller connected to the control device is provided with a detection circuit capable of detecting a long wave standard time radio wave, and the time data of the detected radio wave can be transmitted to the control device. Item 2. A hot water storage type hot water supply apparatus according to item 1 . The hot water storage type hot water supply apparatus according to any one of claims 1 to 3 , wherein the control device is provided in a tank unit . The heat source unit includes a compressor, a heat pump heat exchanger, a refrigerant-to-water heat exchanger, and a water-to-water heat exchanger, and is capable of heating water or hot water with refrigerant heat by the refrigerant-to-water heat exchanger. 5. A hot water storage type hot water supply apparatus according to claim 1, which is a heat pump unit capable of heating water or hot water by hot water stored in the tank unit by the water-to-water heat exchanger. . In a method for operating a hot water storage type hot water supply apparatus having a tank unit having a hot water or a hot water storage tank capable of storing hot water and a heat source unit capable of heating the hot water or water in the hot water storage tank,
  Operate the heat source unit using nighttime power based on the date and time taken from the time data of the long wave standard time radio wave and the data based on the pre-stored seasonal time zone lighting contract, and the long wave standard A hot water storage hot water supply system characterized in that the amount of hot water stored in the tank unit is increased or decreased based on the date taken from the time data of the time signal so that the amount of hot water stored in the summer is greater than the amount of hot water stored outside the summer. how to drive.

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