JP2003014303A - Storage water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the rate of reheating for a regenerative hot water heater capable of reheating in the daytime from increasing or hot water from being extinguished. SOLUTION: There are provided heating means 13 for heating water in a hot water storage tank 5, a daytime reheating function section 18, a memory device 19 for storing operation information in a daytime zone, and a burning temperature set section 20 for setting burning temperature in the next midnight time zone. The amount of necessary hot water is secured by changing the burning set temperature based upon the operation information in the daytime zone reflecting the actual circumstances of the rate of the past use, and heating operation with high energy saving effect is ensured.

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 type water heater having a daytime reheating function.

[0002]

2. Description of the Related Art Conventionally, as this type of hot water storage type water heater,
For example, there is one as shown in JP-A-9-126547. FIG. 8 shows the conventional hot water storage type water heater described in the above publication.

In FIG. 8, a heat pump circuit comprising a compressor 1, a radiator 2, a pressure reducing device 3 and an evaporator 4 and a hot water storage tank 5 are provided.
A circulation circuit is connected to the upper part of the hot water storage tank 5 via the circulation pump 6 and the heat medium heat exchanger 7 for exchanging heat with the radiator 2 from the lower part of A hot water amount detecting means 9 for detecting the hot water temperature in the hot water storage tank 5 is provided.
As the control unit, the hot water temperature setting means 10, the rotation speed controller 11,
It is composed of the controller 12. The rotation speed controller 11 controls the rotation speed of the circulation pump 6 so that the signal from the temperature detector 8 matches the signal from the hot water temperature setting means 10. Immediately before the boiling operation, the controller 12 sets the set temperature of the hot water temperature setting means 10 from the detection signal of the remaining hot water amount of the hot water amount detection means 9 provided in the hot water storage tank 5. That is, when the amount of remaining hot water on the previous day is large, the temperature setting of the hot water temperature setting means 10 is lowered, and conversely, when the amount of remaining hot water is small, the temperature setting is raised.

[0004]

However, in the conventional configuration shown in FIG. 8, it is assumed that boiling is performed only during the nighttime hours, and the required hot water amount is determined by the magnitude of the remaining hot water amount immediately before the boiling operation. The water in the hot water storage tank 5 is boiled up by setting the hot water temperature, but in recent years, the rate system according to the time zone has become widespread, and the amount of remaining hot water decreases during the daytime hours. You can now rebirth. In such a case, a large amount of remaining hot water may be detected immediately before the boiling operation in the middle of the night, and although the actual required hot water amount is large, the required hot water amount is If the boiling water temperature is determined to be low and the boiling water temperature is set low, there is a problem that the additional reheating amount increases or the hot water runs out.

The present invention is to solve the above-mentioned conventional problems. By setting the boiling temperature to a value according to the actual usage amount, the required hot water amount can be secured and the energy saving effect is high. The purpose is to provide a water heater.

[0006]

In order to solve the above problems, the present invention has a hot water storage tank, a heating means for heating water in the hot water storage tank, a daytime reheating function, and the heating means in the daytime zone. And a boiling temperature setting unit for setting the boiling temperature in the next midnight time zone based on the driving information of the storage device.

Thus, based on the operation information of the heating means during the daytime until the day before, for example, if the heating means is not operated at all during the daytime, the heat quantity used is small and the heat quantity in the hot water storage tank Since it shows that there is sufficient margin, if the setting temperature of boiling is lowered and the heating means is operated during the daytime hours, the amount of heat used is large and the amount of heat stored in the nighttime hours. Since it indicates that the temperature is insufficient, the temperature is increased by 1 rank or 2 rank depending on the amount of operation. In this way, by changing the set temperature for boiling based on the driving information during the daytime that reflects the actual state of past usage,
When the amount of heat used is small, by lowering the set temperature, the required amount of hot water can be secured, and the heat loss from the hot water storage tank is reduced, the energy required for boiling is also reduced, and the waste of energy is reduced. A significant energy saving effect can be obtained. Also, when the amount of heat used is large, the required amount of hot water is secured by raising the set temperature for boiling, and the operation of the heating means during the daytime hours when the electricity rate is high is reduced as much as possible without causing a shortage of hot water. As a result, efficient heating operation can be achieved, which has the effect of reducing operating costs and reducing power consumption during the daytime hours when power consumption is high.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 has a hot water storage tank, a heating means for heating water in the hot water storage tank, a daytime reheating function, and operation information of the heating means in the daytime zone. A storage device to be stored, and a boiling temperature setting unit for setting a boiling temperature for the next midnight time period based on the operation information of the storage device.

Thus, based on the operation information of the heating means during the daytime until the day before, for example, if the heating means is not operated at all during the daytime, the heat quantity used is small and the heat quantity in the hot water storage tank Since it shows that there is sufficient margin, if the setting temperature of boiling is lowered and the heating means is operated during the daytime hours, the amount of heat used is large and the amount of heat stored in the nighttime hours. Since it indicates that the temperature is insufficient, the temperature is increased by 1 rank or 2 rank depending on the amount of operation. In this way, by changing the set temperature for boiling based on the driving information during the daytime that reflects the actual state of past usage,
When the amount of heat used is small, by lowering the set temperature, the required amount of hot water can be secured, and the heat loss from the hot water storage tank is reduced, the energy required for boiling is also reduced, and the waste of energy is reduced. A significant energy saving effect can be obtained. Also, when the amount of heat used is large, the required amount of hot water is secured by raising the set temperature for boiling, and the operation of the heating means during the daytime hours when the electricity rate is high is reduced as much as possible without causing a shortage of hot water. As a result, efficient heating operation can be achieved, which has the effect of reducing operating costs and reducing power consumption during the daytime hours when power consumption is high.

The invention as defined in claim 2 is particularly defined by claim 1.
By setting the operation information of the storage device described above to the presence or absence of operation during the daytime hours, if there is no operation of the heating means during the daytime hours, lower the boiling temperature setting and change the heating means during the daytime hours. If there is operation, set the temperature setting section to raise the set temperature for boiling. in this way,
A simple control configuration is achieved by changing the set temperature for boiling depending on whether or not there is an operation during the daytime that reflects the actual amount of water used in the past. As a result, the loss of heat radiation from the hot water storage tank is reduced, the energy required for boiling is reduced, and the waste of energy is reduced, resulting in a significant energy saving effect. Also, when the amount of heat used is large, the required amount of hot water is secured by raising the set temperature for boiling, and the operation of the heating means during the daytime hours when the electricity rate is high is reduced as much as possible without the shortage of hot water As a result, efficient heating operation can be achieved, which has the effect of reducing operating costs and reducing power consumption during the daytime hours when power consumption is high.

The invention as defined in claim 3 is particularly defined by claim 1.
By setting the operation information of the storage device as the number of times of daytime operation, if the heating means is not operated at all during the daytime until the day before, the amount of heat used is small and the amount of heat in the hot water storage tank Since it shows that there is enough margin,
When the setting temperature for boiling was lowered and the heating means was operated during the daytime, the amount of heat used was large, and the amount of heat stored in the nighttime was insufficient depending on the number of times of operation. This means that the set temperature for the first rank or the second rank is increased according to the number of times of operation. In this way, by changing the set temperature of boiling based on the number of times of operation during the daytime period that reflects the actual state of past usage, when the amount of heat used is low, the required temperature can be reduced by lowering the set temperature. As a result, the loss of heat radiation from the hot water storage tank is reduced, the energy required for boiling is reduced, and the waste of energy is reduced, resulting in a significant energy saving effect. If the amount of heat used is large,
Since the set temperature can be raised according to the amount of heat used based on the number of times of operation during the daytime hours, the required amount of hot water can be secured, and hot water shortage does not occur. By reducing the number of operations as much as possible, the operating cost can be reduced, and there is an effect of reducing power consumption during the daytime hours when the power consumption is high.

The invention as defined in claim 4 is particularly defined by claim 1.
By setting the operating information of the storage device as the time required for operation during the daytime hours, if the heating means is not operated at all during the daytime hours until the day before, the amount of heat used is low and the Since it shows that there is sufficient margin in the amount of heat, if the setting temperature for boiling was lowered and the heating means was operated during the daytime hours, the amount of heat used was large and it was stored in the nighttime hours. Since it indicates that the heat storage amount was insufficient in correspondence with the operating time, the set temperature for the first rank or the second rank is increased according to the operating time. In this way, by changing the set temperature of boiling based on the operating time of the daytime period reflecting the actual usage amount in the past, when the used heat amount is low, the set temperature is lowered to reduce the required hot water amount. As a result, the loss of heat radiation from the hot water storage tank is reduced, the energy required for boiling is reduced, and the waste of energy is reduced, resulting in a significant energy saving effect. Also, when the amount of heat used is large, it is possible to raise the temperature to the set temperature based on the time of operation in the daytime hours. By reducing the operation of the heating means as much as possible, the operating cost can be reduced, and there is an effect of reducing the electric power in the daytime hours when the electric power consumption is large.

The invention as defined in claim 5 is particularly characterized by claim 1.
By setting the operation information of the storage device as the heat amount required for daytime operation, if there is no heat amount required for heating means operation during the daytime period until the day before, the heat used is small and Since it shows that there is a sufficient margin in the heat amount of, if the setting temperature of boiling is lowered and there is the heat amount required for the operation of the heating means during the daytime, the used heat amount is large,
It shows that the amount of heat storage stored in the nighttime zone was insufficient corresponding to the amount of heat required for operation. Therefore, depending on the amount of heat required for operation, one rank or two ranks can be used to raise the set temperature. is there. In this way, by changing the set temperature for boiling based on the amount of heat required for daytime operation that reflects the actual amount of past use, it is necessary to lower the set temperature when the amount of heat used is low. A large energy saving effect can be obtained by securing a sufficient amount of hot water, reducing heat loss from the hot water storage tank, reducing the energy required for boiling, and reducing energy waste. Also, when the amount of heat used is large, the temperature can be raised to the set temperature based on the amount of heat required for daytime operation, so the required amount of hot water can be secured and hot water shortage does not occur.
By reducing the operation of the heating means during the daytime hours when the electricity rate is high, the operating cost can be reduced and the power consumption can be reduced during the daytime hours when the power consumption is high.

The invention described in claim 6 is particularly characterized by claim 1.
By setting the operation information of the storage device as the power consumption required for daytime operation, if there is no power consumption required for heating means operation during the daytime until the day before, the heat consumption is low. , It shows that there is sufficient margin in the heat quantity in the hot water storage tank, so if the setting temperature for boiling is lowered and there is the heat quantity required for the operation of the heating means in the daytime hours, the heat quantity used is large, It shows that the amount of heat storage stored in the belt was insufficient corresponding to the amount of power consumption required for operation, so the set temperature is increased by 1 rank or 2 ranks depending on the amount of power consumption required for operation. It is a thing. In this way, by changing the set temperature for boiling based on the power consumption required for daytime operation that reflects the actual usage amount in the past, it is possible to lower the set temperature when the amount of heat used is small. By securing the required amount of hot water and reducing the heat radiation loss from the hot water storage tank, the energy required for boiling is also reduced, and the waste of energy is reduced, so that a significant energy saving effect can be obtained. In addition, when the amount of heat used is large, it is possible to raise the temperature to a set temperature based on the amount of power consumption required for daytime operation, so the required amount of hot water can be secured, and hot water shortage does not occur By reducing the operation of the heating means in the high daytime zone as much as possible, the operating cost can be reduced, and the power consumption can be reduced in the daytime hours when the power consumption is high.

The invention as defined in claim 7 is particularly defined by claim 1.
The storage device described stores the information for several days, and from the maximum value of the information for several days, by having a boiling temperature setting unit that sets the boiling temperature in the next midnight time, the past number Since the amount of heat that can be used for the maximum amount of heat used is stored in the hot water storage tank based on the daily information, it is possible to prevent a shortage of hot water against variations in the amount of heat used.

The invention as defined in claim 8 is particularly defined by claim 1.
Since the heating means described in Nos. 6 to 6 is a heat pump, the heating efficiency of the heat pump is about three times as high as that of the electric heater, so that the power consumption becomes about one-third and a significant energy saving effect can be obtained.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that, in the conventional example and each of the embodiments, those having the same configuration and the same operation are denoted by the same reference numerals, and the description thereof will be partially omitted.

(Embodiment 1) FIG. 1 is a block diagram of a hot water storage type hot water supply apparatus according to Embodiment 1 of the present invention.

In FIG. 1, 1 is a compressor, 2 is a radiator,
Reference numeral 3 is a decompression device, 4 is an evaporator, and the compressor 1, the radiator 2, the decompression device 3, and the evaporator 4 are sequentially connected to form a refrigerant circuit of a heat pump as a heating means 13. Reference numeral 5 is a hot water storage tank, 6 is a circulation pump, 7 is a heat medium heat exchanger for exchanging heat with the radiator 2, and the circulation pump 6 and the heat medium heat exchanger 7 communicate the lower part and the upper part of the hot water tank 5. A heat medium circulation path is configured. A temperature detector 8 is provided at the outlet of the heat medium heat exchanger 7, detects the medium temperature, and emits a signal. Reference numeral 14 denotes a plurality of hot water tank temperature detectors, which detect the temperature of the heat medium in the hot water tank 5 and emit a signal. Reference numeral 15 denotes a heat storage amount detecting means, which receives a signal from the hot water tank temperature detector 14 to detect it as a heat storage amount and emit a signal. Reference numeral 16 denotes an operation control means, which receives a signal from the heat storage amount detection means 15 to control the operation of the heating means 13 and the circulation pump 6 and emit a signal of operation information. Reference numeral 17 denotes a time zone discriminating section which discriminates between the midnight time zone and the daytime time zone and issues a signal. The heat storage amount detection means 15 and the operation control means 16
The time zone discriminating unit 17 constitutes a daytime reheating function unit 18. A storage device 19 stores the operation information signal of the operation control means 16 for several days based on the signal of the time zone determination unit 17. A temperature setting unit 20 has a plurality of temperature setting values, receives a signal from the time zone determination unit 17, sets a boiling temperature based on the operation information of the storage device 19, and issues a signal. Reference numeral 21 denotes a boiling temperature control unit, which controls the operation of the circulation pump 6 so that the signal from the temperature detector 8 matches the signal from the temperature setting unit 20.

The operation and action of the hot water storage type water heater having the above structure will be described below. When a power source (not shown) is turned on, the time zone determination unit 17 receives the signal from the hot water tank temperature detector 14 by the heat storage amount detection unit 15 and the heat storage amount is preset in the daytime period. When it is less than the first predetermined value, a signal is issued to the operation control means 16,
By operating the heating means 13 and the circulation pump 6 according to a command from the operation control means 16, heat is stored from the upper part of the hot water storage tank 5 at the temperature set by the temperature setting section 20, and a preset heat storage amount is secured. Perform heating operation until. Then, the operation information of the daytime hours is stored in the storage device 19. The preset amount of heat storage is set, for example, from the required amount of heat that will be used at least in the hot water in the bathtub, the shower, and the like.

At the time when the time zone discriminating section 17 discriminates the midnight time zone, the temperature setting section 20 reads the maximum value from the data for several days in the daytime zone of the storage device 19, and reads the maximum value. Based on the operation information, the boiling temperature is set from a plurality of preset temperature setting values, and the boiling temperature control unit 21 circulates so that the signal of the temperature detector 8 matches the signal of the temperature setting unit 20. By controlling the operation of the pump 6, heat is stored from the upper part in the hot water storage tank 5 at a set temperature, and the entire amount of the hot water storage tank 5 is heated.
When setting the boiling temperature for the first time, the maximum temperature (for example, 90 ° C.) is set as an initial value among a plurality of temperature setting values in the temperature setting unit 20, and the maximum temperature is set. After the second time, for example, when the maximum value of the operation information of the storage device 19 is, for example, the operation of the heating means 13 is not performed at all during the daytime, the used heat amount is small and the heat amount in the hot water storage tank 5 has a sufficient margin. Therefore, if the heating temperature is lowered by one rank from the setting value of the previous day and the heating means 13 is operated in the daytime hours, the amount of heat used is large and the heating time is in the nighttime hours. It indicates that the amount of stored heat was insufficient, so 1 rank or 2 depending on the amount of operation (number of times of operation, operating time, etc.)
Raises the rank setting temperature.

The set boiling temperature in the daytime is basically the temperature set in the midnight time, but the boiling temperature may be set separately for the daytime.

As described above, in the present embodiment, the amount of heat used is changed by changing the boiling setting temperature in the next midnight time based on the driving information in the daytime that reflects the actual usage amount in the past. If the amount of water is small, lower the set temperature to secure the required amount of hot water, reduce the heat radiation loss from the hot water storage tank 5, reduce the energy required for boiling, and reduce the waste of energy. The energy saving effect can be obtained. In addition, when the amount of heat used is large, the required amount of hot water is secured by raising the set temperature for boiling, and the running of the heating means 13 during the daytime hours when the electricity rate is high is as high as possible without causing a shortage of hot water. By subtracting,
The operating cost can be reduced and the power consumption can be reduced during the daytime when the power consumption is high.

Further, by using a heat pump as the heating means 13, the heating efficiency of the heat pump is about three times as high as that of the electric heater, so that the power consumption is about one third and the boiling temperature is reduced. When the temperature is set low, the heating efficiency of the heat pump is further improved. Therefore, as described above, the control configuration for lowering the boiling temperature when the amount of heat used is small can achieve a significant energy saving effect.

Further, by having the boiling temperature setting section 20 for setting the boiling temperature in the next midnight time from the maximum value of the information for the several days, the maximum operation of the information for the past several days can be obtained. Since the amount of heat corresponding to the amount (number of times of operation, operating time, etc.) is stored in the hot water storage tank 5, it is possible to prevent a shortage of hot water due to variations in the amount of heat used.

Although the heating means 13 is constituted by a heat pump, it is clear that the same effect can be obtained even when an electric heater is used.

As shown in FIG. 2, the same action and effect can be obtained even if the heating means 13 is installed inside the hot water storage tank 5.

(Embodiment 2) FIG. 3 is a block diagram of a hot water storage type hot water supply apparatus according to Embodiment 2 of the present invention.

In FIG. 3, reference numeral 22 denotes an operation presence / absence determining section, which receives a signal from the operation control means 16 to determine whether the heating means 13 is in operation during the daytime, and transmits the result to the storage device 19, The storage device 19 stores the driving information as the presence / absence of driving during the daytime.

The operation and action of the hot water storage type water heater having the above structure will be described below. Time zone determination unit 1
When it is determined to be the midnight time zone in 7, the temperature setting unit 20 reads the maximum value from the driving information stored in the storage device 19 indicating whether or not the vehicle is operating during the daytime hours, and the heating means is used during the daytime hours. If there was no driving of 13,
When the heating temperature setting is lowered by one rank from the setting temperature of the previous day and the heating means 13 is operated during the daytime,
The temperature setting unit sets the boiling temperature setting so that it is one rank higher than the setting temperature of the previous day.

As described above, in the present embodiment, a simple control configuration is obtained by changing the set temperature for boiling depending on the presence / absence of operation during the daytime period, which reflects the actual usage amount in the past. If the amount is small, lower the set temperature to secure the required amount of hot water, reduce the heat loss from the hot water storage tank, reduce the energy required for boiling, and reduce the waste of energy. Is obtained. Also, if the amount of heat used is large, increase the set temperature for boiling to secure the required amount of hot water,
The operation cost can be reduced by reducing the operation of the heating means during the daytime hours when the electricity rate is high without a hot water shortage, and the power consumption can be reduced during the daytime hours when the power consumption is high.

(Embodiment 3) FIG. 4 is a block diagram of a hot water storage type hot water supply apparatus according to Embodiment 3 of the present invention.

In FIG. 4, reference numeral 23 denotes an operation number calculation section, which receives a signal from the operation control means 16 and calculates the number of times the heating means 13 is operated in each daytime zone, and sends the result to the storage device 19. The storage device 19 stores the driving information as the number of times of driving during the daytime.

The operation and action of the hot water storage type hot water supply apparatus having the above structure will be described below. Time zone determination unit 1
When it is determined to be the midnight time zone in 7, the temperature setting unit 20 reads the maximum value from the operation information for several days stored in the storage device 19 and operates the heating means 13 in the daytime hours. If it is not performed at all, it means that the amount of heat used is small and there is sufficient margin in the amount of heat in the hot water storage tank 5, so the set temperature for boiling is lowered by one rank from the set temperature of the previous day, and the daytime When the heating means 13 is operated in the zone, it indicates that the amount of heat used is large and the amount of heat stored and stored in the nighttime zone is insufficient corresponding to the number of times of operation. 1 from the set temperature of the previous day according to the number of times of operation of the maximum value read from 19
Rank or 2 rank increases the set temperature.

As described above, in the present embodiment, when the set heat amount for boiling is changed based on the number of times of operation in the daytime period, which reflects the actual usage amount in the past, when the used heat amount is small, By lowering the set temperature, the required amount of hot water is secured, the heat loss from the hot water storage tank is reduced, the energy required for boiling is also reduced, and the waste of energy is reduced, resulting in a significant energy saving effect. . In addition, when the amount of heat used is large, since the shortage of the amount of heat stored by storing heat in the midnight time period is related to the actual amount of heat used, it is related to the number of times the heating means 13 is operated in the daytime time period. Since the set temperature can be raised according to the amount of heat used, which is based on the number of times of operation during the daytime hours, the required amount of hot water can be secured to prevent heating shortages, and heating means during the daytime hours when electricity costs are high. By reducing the operation of No. 13 as much as possible, the operating cost can be reduced, and there is an effect of reducing the electric power in the daytime hours when the electric power consumption is large.

Further, by including the boiling temperature setting unit 19 for setting the boiling temperature in the next midnight time from the maximum value of the information for several days, the maximum amount of heat used from the information for the past several days is provided. Since the amount of heat that can cope with the above is stored in the hot water storage tank 5, it is possible to prevent the occurrence of a shortage of hot water against variations in the amount of heat used.

(Embodiment 4) FIG. 5 is a block diagram of a hot water storage type hot water supply apparatus according to Embodiment 4 of the present invention.

In FIG. 5, reference numeral 24 denotes an operation time calculation unit, which receives a signal from the operation control means 16 to calculate the operation time of the heating means 13 in each daytime zone and sends the result to the storage device 19. The storage device 19 stores the driving information as the time required for driving in each daytime period.

The operation and action of the hot water storage type hot water supply apparatus configured as described above will be described below. Time zone determination unit 1
7, when it is determined to be the midnight time zone, the temperature setting unit 20 reads the maximum value from the driving information of the driving time in the daytime time zone stored in the storage device 19, and the heating means is set in each daytime zone up to the previous day. If the operation of No. 13 is not performed at all, it means that the amount of heat used is small and there is a sufficient margin in the amount of heat in the hot water storage tank 5, so the set temperature for boiling is lowered by one rank from the set temperature of the previous day, and If the heating means was operated during the time zone, the amount of heat used was large, indicating that the amount of heat stored in the nighttime zone was insufficient corresponding to the operating hours. 1
The set temperature is increased by one rank or two ranks from the set temperature of the previous day according to the maximum operation time read from No. 9. In this way, by changing the set temperature of boiling based on the operating time of the daytime period reflecting the actual usage amount in the past, when the used heat amount is low, the set temperature is lowered to reduce the required hot water amount. By securing and also reducing heat loss from the hot water storage tank, reducing the energy required for boiling and reducing energy waste,
A significant energy saving effect can be obtained. Also, when the amount of heat used is large, it is possible to raise the temperature to the set temperature based on the time of operation in the daytime hours. By reducing the operation of the heating means 13 as much as possible, the operating cost can be reduced, and there is an effect of reducing the electric power in the daytime hours when the electric power consumption is large.

(Embodiment 5) FIG. 6 is a diagram showing the configuration of a hot water storage type hot water supply apparatus according to a fifth embodiment of the present invention.

In FIG. 6, reference numeral 25 denotes an operating calorific value calculation unit, which receives a signal from the operational control means 16 and calculates the calorific value required for the operational operation of the heating means 13 in each daytime zone, and the result is stored in the storage device 19. The storage device 19 stores the driving information as the amount of heat required for driving during the daytime.

The operation and action of the hot water storage type hot water supply apparatus having the above structure will be described below. Time zone determination unit 1
When it is determined to be the midnight time zone in 7, the temperature setting unit 20 reads the maximum value from the operation information for several days stored in the storage device 19 and heats it in each daytime zone up to the previous day. If there is no heat amount required for the operation of the means 13, it means that the used heat amount is small and there is a sufficient margin in the heat amount in the hot water storage tank 5, so the set temperature for boiling is lowered by one rank from the set temperature of the previous day. If there is a heat quantity required for the operation of the heating means 13 in the daytime hours, the heat quantity used is large, and the heat storage amount stored and stored in the nighttime hours is insufficient corresponding to the heat quantity required for the operation. As shown, the set temperature is increased by one rank or two ranks from the set temperature of the previous day according to the amount of heat required for operation of the maximum value read from the storage device 19.

As described above, in this embodiment, the amount of heat used is small by changing the set temperature for boiling based on the amount of heat required for the operation in each daytime period that reflects the actual state of the amount used in the past. In this case, by lowering the set temperature, the required amount of hot water is secured, the heat radiation loss from the hot water storage tank 5 is reduced, the energy required for boiling is also reduced, and the waste of energy is reduced. The effect is obtained. Also, when the amount of heat used is large, it is possible to accurately calculate the insufficient amount of heat based on the amount of heat required for daytime operation and raise it to the set temperature corresponding to it, so secure the required amount of hot water Without heating, the heating means 13 in the daytime hours when the power rate is high
By reducing the number of operations as much as possible, the operating cost can be reduced, and there is an effect of reducing power consumption during the daytime hours when the power consumption is high.

(Embodiment 6) FIG. 7 is a diagram showing the configuration of a hot water storage type hot water supply apparatus according to Embodiment 6 of the present invention.

In FIG. 7, reference numeral 26 is a power consumption amount calculation unit, which receives a signal from the operation control means 16 and calculates the power consumption amount required for the driving operation of the heating means 13 in each daytime zone, and outputs the result. Send to the storage device 19
Stores the driving information as the amount of power consumption required for driving during the daytime.

The operation and action of the hot water storage type hot water supply apparatus having the above structure will be described below. Time zone determination unit 1
When it is determined to be the midnight time zone in 7, the temperature setting unit 20 reads the maximum value from the operation information for several days stored in the storage device 19, and the heating means is used in the daytime hours until the previous day. If there is no power consumption required for the operation of No. 13, it means that the amount of heat used is small and there is a sufficient margin in the amount of heat in the hot water storage tank 5, so the set temperature for boiling is one rank higher than the set temperature of the previous day. If the amount of heat required to operate the heating means was lowered during the daytime, the amount of heat used was large, and the amount of heat stored in the nighttime was insufficient to correspond to the amount of power consumption required for operation. Therefore, according to the amount of power consumption required for operation of the maximum value read from the storage device 19, the set temperature of one rank or two ranks is increased from the set temperature of the previous day.

As described above, in the present embodiment, by changing the set temperature for boiling based on the power consumption required for the daytime operation that reflects the actual state of the past usage, When the amount is small, the set temperature is lowered to secure the required amount of hot water, the heat radiation loss from the hot water storage tank 5 is reduced, the energy required for boiling is also reduced, and the waste of energy is greatly reduced. Energy saving effect can be obtained. Also, when the amount of heat used is large, it is possible to accurately calculate the amount of insufficient heat based on the amount of power consumption required for operation during the daytime hours, and to raise it to the set temperature corresponding to it, so secure the required amount of hot water, The running cost can be reduced by reducing the operation of the heating means 13 during the daytime hours when the electricity rate is high, and the effect of reducing the power consumption during the daytime hours when the power consumption is high can be achieved without causing a shortage of hot water. .

Although the heating means described in Embodiments 1 to 6 is a heat pump, it is clear that the same effect can be obtained even when an electric heater is used. Further, the same action and effect can be obtained even if a plurality of heating means 13 are installed inside the hot water storage tank 5.

Furthermore, in each of the above embodiments, in order to adjust the outlet temperature of the heat exchanger 7 to the set temperature, the circulation pump 6 is operated so that the signal of the temperature detector 8 matches the signal of the temperature setting means 20. However, it is also possible to adjust the flow rate by providing a flow rate control valve in the water circulation path.

[0050]

As described above, according to the invention described in claims 1 to 8, by setting the boiling temperature to a value according to the actual condition of the amount used, the required amount of hot water is secured, and
Heating operation with high energy saving effect can be performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a hot water storage type water heater according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a hot water storage type water heater having different heating means positions according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a hot water storage type water heater according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a hot water storage type water heater according to a third embodiment of the present invention.

FIG. 5 is a configuration diagram of a hot water storage water heater according to a fourth embodiment of the present invention.

FIG. 6 is a configuration diagram of a hot water storage water heater according to a fifth embodiment of the present invention.

[Fig. 7] Fig. 7 is a configuration diagram of a hot water storage type water heater according to a sixth embodiment of the present invention.

FIG. 8 is a block diagram of a conventional hot water storage type water heater.

[Explanation of symbols]

5 hot water storage tank 13 Heating means (heat pump) 15 Heat storage amount detection means 16 Operation control means 18 Daytime reheating function section 19 storage device 20 Temperature setting section 22 Operation presence / absence determination unit 23 Operation count calculator 24 Operating time calculator 25 Operating calorific value calculation unit 26 Power consumption calculator

Continued front page    (72) Inventor Takeshi Watanabe             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd.

Claims (8)

[Claims] 1. A hot water storage tank, heating means for heating water in the hot water storage tank, a storage device having a daytime reheating function and storing operation information during the daytime, and based on the operation information of the storage device, A hot-water storage type hot-water supply system with a temperature setting unit that sets the boiling temperature for the next midnight hours. 2. The hot water storage type water heater according to claim 1, wherein the operation information of the storage device indicates whether or not the operation is performed during the daytime. 3. The hot water storage type water heater according to claim 1, wherein the operation information of the storage device is the number of times of operation during the daytime. 4. The hot water storage type water heater according to claim 1, wherein the operation information of the storage device is the time required for the operation in the daytime. 5. The hot water storage type water heater according to claim 1, wherein the operation information of the storage device is the amount of heat required for operation during the daytime. 6. The operation information of the storage device is the amount of power consumption required for operation during the daytime hours.
Hot water storage water heater described. 7. The storage device stores information for several days, and has a boiling temperature setting unit for setting the boiling temperature in the next midnight time zone from the maximum value of the information for several days. The hot water storage type water heater according to claim 1. 8. The hot water storage type water heater according to claim 1, wherein the heating means is a heat pump.