JP2003014304A - Storage water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the rate of reheating from being increased for a storage water heater capable of reheating in the daytime or hot water from being exhausted. SOLUTION: There are provided a circulation pump 6 for taking out water in a hot water storage tank 5 from a lower portion of the tank and returning it to an upper portion of the same, heating means 13 for heating the water circulated with the circulation pump 66, a memory device 19 including a daytime reheating function 18 for storing operation information in a daytime zone, and a boiling-up time setting section 20 for setting burning time in the next midnight time zone based upon the operation information in the memory device 19. Setting time for boiling-up is altered based upon the operation information in the daytime zone reflecting the actual circumstances of the rate of the past use, whereby the amount of required heat in response to the actual circumstances of the use and hot water at high temperature are ensured, 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. 9 shows a conventional hot water storage type water heater described in the above publication.

In FIG. 9, a heat pump circuit including 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 water heat exchanger 7 that exchanges heat with the radiator 2 from the lower part of the water heat exchanger 7, and the temperature detector 8 is provided at the outlet side of the water heat exchanger 7. A hot water amount detecting means 9 for detecting the hot water temperature of the hot water storage tank 5 is provided, and the hot water temperature setting means 10, the rotation speed controller 11, and the controller 1 are provided as control units.
It consists of 2. 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. 9, it is assumed that boiling is performed only in the midnight time, 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 charge 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. Further, when the required amount of heat is small, the boiling temperature is set low, so that, for example, when the temperature of the bathtub decreases and it is desired to raise the temperature with hot water, it is not possible to obtain the required high-temperature hot water. There is.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide a hot water storage type hot water supply device which secures a required amount of heat and high temperature hot water according to the actual conditions of use and has a high energy saving effect.

[0006]

In order to solve the above problems, the present invention provides a hot water storage tank, a circulation pump for taking out water in the hot water storage tank from a lower portion and returning it to an upper portion, and heating water circulated by the circulation pump. A heating unit that has a daytime reheating function, a storage device that stores operating information during the daytime hours, and based on the operating information of the storage device, a time setting unit that sets the boiling time for the next midnight time period. Be prepared.

Thus, the setting time for boiling in the midnight time is changed based on the driving information in the daytime reflecting the actual usage amount in the past, and the setting time is shortened when the amount of heat used is small. As a result, the high-temperature hot water heated by the heating means can be stored from the upper part of the hot water storage tank in an amount corresponding to the set operation time, so that the energy required for boiling is reduced and the energy saving effect is enhanced. Also, when the amount of heat used is large, the amount of hot water to be stored is increased by lengthening the setting time for boiling to ensure the required amount of heat and high-temperature hot water in accordance with the actual conditions of use without causing hot water shortages.
By reducing the operation of the heating means during the daytime hours when the electricity rate is high as much as possible, efficient heating operation can be performed, 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 is a hot water storage tank, a circulation pump for taking out water in the hot water storage tank from a lower portion and returning it to an upper portion, a heating means for heating water circulated by the circulation pump, With a daytime reheating function, a storage device that stores the operation information of the daytime time zone, based on the operation information of the storage device, with a time setting unit that performs the boiling time setting of the next midnight time period. is there.

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 time of boiling in the midnight time is shortened and the heating means is operated during the daytime, the heat used is large and Since it indicates that the stored heat storage amount was insufficient, the boiling time in the midnight time zone is set to be one rank or two ranks longer depending on the amount of operation. In this way, by changing the setting time of boiling based on the operating information of the daytime period reflecting the actual usage amount in the past, by shortening the setting time when the amount of heat used is small, the heating means The heated high-temperature hot water is stored from the top of the hot water storage tank in an amount equivalent to the set operating time, ensuring the required amount of heat and high-temperature hot water according to the actual conditions of use, and less energy required for boiling. The energy saving effect becomes high. Also,
When the amount of heat used is large, the amount of hot water to be stored is increased by lengthening the setting time for boiling to ensure the required amount of heat and high-temperature hot water that match the actual usage without causing a shortage of hot water. By reducing the operation of the heating means in the high daytime hours as much as possible, the operating cost can be reduced and the electric power can be reduced in the daytime hours when the power consumption is high.

The invention as defined in claim 2 is particularly defined by claim 1.
When the operation information of the storage device described is whether or not the heating means is operated during the daytime hours, if there is no operation of the heating means during the daytime hours, the heating temperature is shortened during the daytime hours. If there is an operation of, the time setting unit sets the boiling time to be longer. In this way, by changing the setting time of boiling in the midnight time period depending on the presence or absence of operation in the daytime time zone that reflects the actual usage amount in the past, a simple control configuration is provided, and when the amount of heat used is small, the set time is set. By shortening, the energy required for boiling is reduced and the energy saving effect is enhanced. Also,
If there is a large amount of heat used, by setting the boiling time longer, you can ensure the required amount of heat and high-temperature hot water that match the actual conditions of use without causing a shortage of hot water. 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 during the daytime hours when the electric power consumption is large.

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 time for boiling is shortened and the heating means is operated during the daytime hours, there is a large amount of heat used, and the amount of heat stored in the midnight hours is insufficient depending on the number of times of operation. Therefore, the setting time for one rank or two ranks is lengthened according to the number of times of driving.
In this way, by changing the set time for boiling in the midnight time period based on the number of times of daytime operation reflecting the actual usage amount in the past, the set time should be shortened when the heat usage amount is low. Thus, the energy required for boiling is reduced and the energy saving effect is enhanced. In addition, when the amount of heat used is large, the set time can be lengthened according to the amount of heat used based on the number of times of operation during the daytime to ensure the required amount of hot water. By securing the required amount of heat and high-temperature hot water in accordance with the actual conditions, and by reducing the operation of the heating means during the daytime hours when electricity charges are high as much as possible, operating costs can be reduced, and power consumption during the daytime hours when electricity consumption is high There is a reduction effect.

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 a sufficient margin in the amount of heat, the setting time of boiling is shortened, and when the operation of the heating means is carried out during the daytime, the amount of heat used is large,
It shows that the amount of heat storage stored in the midnight time zone was insufficient corresponding to the driving time in the daytime zone, so 1 rank or 2 rank setting time should be set according to the driving time in the daytime zone. It is something to lengthen. In this way, by changing the setting time of boiling based on the operating time in the daytime time zone that reflects the actual usage amount in the past, by shortening the setting time when the amount of heat used is small, The energy required for energy saving is reduced and the energy saving effect is enhanced. Also, when the amount of heat used is large, the set time can be lengthened according to the time of daytime operation to secure the required amount of hot water, so there is no shortage of hot water and it is necessary to meet the actual usage conditions. By securing the amount of heat and high-temperature hot water and reducing the operation of the heating means during the daytime hours when the electricity rate is high as much as possible, operating costs can be reduced, and there is an effect of reducing power consumption during the daytime hours when power consumption is high. .

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 It shows that there is a sufficient margin in the heat amount of, so if the setting time of boiling is shortened and there is the heat amount required for the operation of the heating means in the daytime hours, there is a lot of heat used and it is stored in the midnight hours. It shows that the stored heat quantity was insufficient corresponding to the heat quantity required for daytime operation, so 1 rank or 2 rank setting time was set according to the heat quantity required for daytime operation. It is something to lengthen. In this way, by changing the setting time for boiling in the midnight time period based on the amount of heat required for daytime operation that reflects the actual usage amount in the past, the setting time can be shortened when the amount of heat used is small. By doing so, the energy required for boiling is reduced and the energy saving effect is enhanced. Also, when the amount of heat used is large, the set time can be lengthened according to the time of daytime operation to secure the required amount of hot water, so there is no shortage of hot water and it is necessary to meet the actual usage conditions. By securing the amount of heat and high-temperature hot water and reducing the operation of the heating means during the daytime hours when the electricity rate is high as much as possible, operating costs can be reduced, and there is an effect of reducing power consumption during the daytime hours when 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 time of boiling in the midnight time is shortened and there is the heat quantity required for the operation of the heating means in the daytime time, This means that the amount of heat storage stored in the late-night hours was insufficient to correspond to the amount of power consumed during daytime operation. The setting time for one rank or two ranks is lengthened according to the amount. In this way, by changing the set temperature for boiling in the midnight time based on the amount of power consumption required for operation during the daytime that reflects the actual usage amount in the past, the set time can be set when the amount of heat used is small. By shortening, the energy required for boiling is reduced and the energy saving effect is enhanced. Also, when the amount of heat used is large, the set time can be lengthened according to the time of daytime operation to secure the required amount of hot water, so there is no shortage of hot water and it is necessary to meet the actual usage conditions. By securing the amount of heat and high-temperature hot water and reducing the operation of the heating means during the daytime hours when the electricity rate is high, the operating cost can be reduced.
It has the effect of reducing power consumption during the daytime 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 water heat exchanger that exchanges heat with the radiator 2, and the circulation pump 6 and the water heat exchanger 7 are water circulations that connect the lower portion and the upper portion of the hot water storage tank 5 to each other. Make a road. A temperature detector 8 is provided at the outlet of the water 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 water temperature 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 unit 15, the operation control unit 16, and the time zone determination unit 17 constitute a daytime reheating function unit 18. Reference numeral 19 denotes a storage device, which is based on a signal from the time zone discriminating unit 17
The driving information signal 6 is stored for several days. A time setting unit 20 has a plurality of time setting values, receives a signal from the time zone determination unit 17, sets the boiling time based on the operation information of the storage device 19, and issues a signal. Reference numeral 21 is a temperature setting means, which sets the boiling temperature and has a plurality of set values at a high temperature level (for example, 75 to 90 ° C.). Reference numeral 22 is a circulation amount adjusting means, which operates the circulation pump 6 so that the signal of the temperature detector 8 matches the signal of the temperature setting means 21 in order to adjust the outlet temperature of the water heat exchanger 7 to the set temperature. Control.

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 in accordance with 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 part 21, and a preset heat storage amount is secured. The heating operation is performed until then, and the operation information of the daytime period 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.

Further, when the time zone discriminating section 17 discriminates the midnight time zone, the time setting section 20 reads the maximum value from the data for several days in the daytime zone of the storage device 19, and finds the maximum value. Based on the operation information, the boiling time is set from a plurality of preset time values, and the heating means 13 and the circulation pump 6 are operated for the set time according to a command from the operation control means 16. . When the entire hot water storage tank reaches the predetermined temperature within the set time, the operation is stopped at that time. When setting the boiling time for the first time, the maximum time (e.g., 8 hours) is set as an initial value among a plurality of time setting values in the time setting unit 20, and is set as the maximum time. 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. If the heating means 13 is operated during the daytime hours by shortening the boiling time by one rank from the setting value on the previous day, the amount of heat used is large and the nighttime hours Since it indicates that the amount of heat storage stored in (1) is insufficient, the setting time for one rank or two ranks is lengthened according to the amount of operation (number of times of operation, operating time, etc.).

The boiling setting is performed by the temperature setting means 21.
It is automatically or manually set from a plurality of set values of a high temperature level (for example, 75 to 90 ° C.) included therein.

As described above, in the present embodiment, the amount of heat used is small by changing the set time for boiling in the midnight time period based on the driving information in the daytime time period that reflects the actual state of the past usage amount. In this case, by shortening the set time, the high temperature hot water heated by the heating means can be stored from the upper part of the hot water storage tank 5 in an amount corresponding to the set operating time. Ensuring hot water and reducing the amount of energy required to boil water increases the energy saving effect. If the amount of heat used is large, set the boiling time in the midnight time to a longer amount to increase the amount of hot water stored, and ensure the required amount of heat and high-temperature hot water in accordance with the actual conditions of use without causing a hot water shortage. By reducing the operation of the heating means 13 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.

Further, by using the heat pump as the heating means 13, the heating efficiency of the heat pump is about 2 to 3 times higher than that of the electric heater, so that the power consumption becomes about one-third, which is a great energy saving effect. Is obtained.

Further, by including the boiling time setting unit 20 for setting the boiling time in the next midnight time zone 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.

In FIG. 1, in order to adjust the outlet temperature of the water 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 21. Although it has been described as the configuration for controlling, as shown in FIG. 3, the flow rate can be adjusted by the flow rate adjusting valve 23 provided in the water circulation path.

Although the heat storage amount detecting means 15 is the signal of the plurality of hot water storage tank temperature detecting means 14, for example, the hot water storage tank 5 is used.
Other means such as a method of detecting the amount of hot water discharged from the tank with a flow meter may be used.

(Embodiment 2) FIG. 4 is a block diagram of a hot water storage type hot water supply apparatus according to Embodiment 2 of the present invention.

In FIG. 4, reference numeral 24 denotes an operation presence / absence determining unit, 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 hot water supply apparatus configured as described above will be described below. Time zone determination unit 1
7, when the time is determined to be the midnight time zone, the time setting unit 20 reads the maximum value from the operation information indicating whether or not the vehicle is operating during the daytime hours for several days stored in the storage device 19, and the heating means is used during the daytime hours. When there is no operation of 13, the boiling time setting is shortened by one rank from the setting time of the previous day, and when the heating means 13 is operated during the daytime, the setting time of boiling in the midnight time is set. Is set by the time setting unit 20 so as to be one rank longer than the set time of the previous day.

As described above, in the present embodiment, the presence or absence of the operation during the daytime period, which reflects the actual condition of the past usage,
By changing the setting time of boiling in the midnight time zone,
With a simple control configuration, if the amount of heat used is small, by shortening the set time in the midnight time period, the required amount of heat and high-temperature hot water can be secured in accordance with the actual conditions of use, and the heat radiation loss from the hot water storage tank 5 can be reduced. This reduces the amount of energy required for boiling and enhances the energy saving effect. In addition, if the amount of heat used is high, the setting time for boiling in the middle of the night is extended to ensure the required amount of heat and high-temperature hot water according to the actual conditions of use without causing a shortage of hot water. By reducing the operation of the heating means 13 in the high daytime hours 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 power consumption is large.

(Embodiment 3) FIG. 5 is a block diagram of a hot water storage type hot water supply apparatus according to Embodiment 3 of the present invention.

In FIG. 5, reference numeral 25 denotes an operation number calculation section, which receives the 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 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 time setting unit 20 reads the maximum value from the driving information for several days stored in the storage device 19, and drives the heating means 13 in the daytime hours. If it is not carried out at all, it means that the amount of heat used is small and there is enough margin in the amount of heat in the hot water storage tank 5, so the setting time for boiling in the midnight time period is shortened by one rank from the setting time on the previous day. In addition, when the heating means 13 is operated during the daytime, it indicates that the amount of heat used is large and the amount of heat stored and stored in the midnight time is insufficient in correspondence with the number of times of operation. Therefore, depending on the number of times of driving of the maximum value read from the storage device 19, the 1 rank or 2 rank setting time is lengthened from the setting time in the midnight time zone of the previous day.

As described above, in the present embodiment, by changing the set time for boiling in the midnight time zone based on the number of times of operation in the daytime time zone that reflects the actual state of past usage, When the amount is small, by shortening the setting time of the midnight time period, the required amount of heat and high-temperature hot water can be secured according to the actual conditions of use, and the energy required for boiling is reduced, resulting in higher energy saving effect. Further, when the amount of heat used is large, the shortage of the amount of heat stored by storing heat in the midnight time period relative to the actual amount of heat used is the heating means 1 in the daytime time period.
Since it is related to the number of times of operation of No. 3, it is possible to secure the required amount of hot water by lengthening the set time of operation in the midnight time zone according to the amount of heat used based on the number of times of operation in the daytime hours. By securing the required amount of heat and high-temperature hot water in accordance with the actual conditions of use without causing a shortage of hot water, and by reducing the operation of the heating means 13 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 when the power consumption is high.

Further, by including the boiling time setting unit 20 for setting the boiling time in the next midnight time zone from the maximum value of the information for the 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. 6 is a block diagram of a hot water storage type hot water supply apparatus according to Embodiment 4 of the present invention.

In FIG. 6, reference numeral 26 denotes an operation time calculation unit, which receives a signal from the operation control means 16 and calculates 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 having the above structure will be described below. Time zone determination unit 1
7, when the time is determined to be the midnight time zone, the time 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 setting time of boiling in the midnight time period is set to 1 from the setting time of the previous day. When the rank is shortened and the heating means 13 is operated during the daytime, it indicates that the amount of heat used is large and the amount of heat stored in the midnight time is insufficient corresponding to the operating time. Therefore, the set time of the midnight time zone is increased by one rank or two ranks from the set time of the previous day according to the driving time of the maximum value read from the storage device 19. In this way, by changing the setting time of boiling in the midnight time zone based on the operating time in the daytime time zone that reflects the actual usage amount in the past, the setting time of the midnight time zone is used when the heat consumption is low. By shortening, the required amount of heat and high-temperature hot water according to the actual conditions of use can be secured, and the energy required for boiling can be reduced, and the energy saving effect can be enhanced. Also, when the amount of heat used is large, it is possible to increase the set time for the midnight time zone according to the operating time during the daytime to secure the required amount of hot water. By securing the required amount of heat and high-temperature hot water in accordance with the above, and reducing the operation of the heating means 13 in the daytime hours when the electricity rate is high as much as possible, the operating cost can be reduced and the power consumption in the daytime hours when the power consumption is high There is a reduction effect.

In the above description, the set time for the midnight time zone is set based on a plurality of preset values set in the time setting section 20, but a margin rate is set for the operating time in the daytime zone. The same operation and effect can be obtained by using the method of adding the added time to the set time of the midnight time zone of the previous day.

(Embodiment 5) FIG. 7 is a configuration diagram of a hot water storage type hot water supply apparatus according to a fifth embodiment of the present invention.

In FIG. 7, reference numeral 27 denotes an operating heat quantity calculating unit, which receives a signal from the operation control means 16 and calculates the heat quantity required for the driving 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 configured as described above will be described below. Time zone determination unit 1
When it is determined to be the midnight time zone in 7, the time setting unit 20 reads the maximum value from the driving 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 calorific value required for the operation of the means 13, it means that the calorific value used is small and the calorific value in the hot water storage tank 5 has a sufficient margin. Therefore, the setting time of boiling in the midnight time zone is set to the setting time of the previous day. If the amount of heat required to operate the heating means 13 during the daytime is shortened by 1 rank,
It indicates that the amount of heat used is large and that the amount of heat stored in the middle of the nighttime is insufficient corresponding to the amount of heat required for operation. Therefore, the amount of heat required for operation of the maximum value read from the storage device 19 is required. Accordingly, the setting time for one rank or two ranks is made longer than the setting time in the midnight time zone on the previous day.

As described above, in this embodiment, by changing the set time of boiling in the midnight time zone based on the heat quantity required for the operation in each daytime zone, which reflects the actual state of past usage, When the amount of heat used is small, by shortening the set time for the midnight hours, the required amount of heat and high-temperature hot water can be secured in accordance with the actual conditions of use, and the energy required for boiling is reduced and the energy saving effect is enhanced. . Also, when the amount of heat used is large, it is possible to increase the set time for the midnight time zone according to the operating time during the daytime to secure the required amount of hot water. By securing the required amount of heat and high-temperature hot water in accordance with the above, and reducing the operation of the heating means 13 in the daytime hours when the electricity rate is high as much as possible, the operating cost can be reduced and the power consumption in the daytime hours when the power consumption is high There is a reduction effect.

(Embodiment 6) FIG. 8 is a diagram showing the configuration of a hot water storage type water heater in Embodiment 6 of the present invention.

In FIG. 8, reference numeral 28 denotes a power consumption calculation unit, which receives a signal from the operation control means 16 and calculates the power consumption required for the driving operation of the heating means 13 in each daytime zone, and the result is shown. 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
7, when the time is determined to be the midnight time zone, the time setting unit 20 reads the maximum value from the driving information for several days stored in the storage device 19, and the heating means is used during the daytime hours up to 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 setting time for boiling in the midnight time zone is set to the previous day. If the amount of heat required to operate the heating means during the daytime is shortened by one rank from the time,
It indicates that the amount of heat used is large, and the amount of heat stored and stored in the midnight hours was insufficient corresponding to the amount of power consumption required for operation. Therefore, it is necessary for operation of the maximum value read from the storage device 19. Depending on the amount of power consumption, the rank 1 or rank 2 setting time is extended from the setting time in the midnight time zone of the previous day.

As described above, in the present embodiment, by changing the set time for boiling in the midnight time period based on the power consumption amount required for the operation in the daytime time period, which reflects the actual usage amount in the past. When the amount of heat used is small, the required amount of heat and high-temperature hot water can be secured according to the actual conditions of use by shortening the setting time of the midnight time zone, and the energy required for boiling is also reduced, resulting in a high energy saving effect. Become. Also, when the amount of heat used is large, the amount of insufficient heat can be accurately determined based on the amount of power consumption required for daytime operation,
Since it is possible to lengthen the setting of the operating time in the midnight time corresponding to that, it is possible to secure the required amount of hot water, so that there is no shortage of hot water, and the required amount of heat and high temperature hot water suitable for the actual usage are secured. By reducing the operation of the heating means 13 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.

Although the heating means described in the first to sixth embodiments has a heat pump structure, it is obvious 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.

[0052]

As described above, according to the invention described in claims 1 to 8, it is possible to secure the required amount of heat and high-temperature hot water in accordance with the actual conditions of use, and to perform the heating operation with a high energy saving effect.

[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] Fig. 3 is a configuration diagram of a hot water storage type water heater having different flow rate adjusting means in the first embodiment of the present invention.

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

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

FIG. 6 is a configuration diagram of a hot water storage type hot water supply device according to a fourth embodiment of the present invention.

FIG. 7 is a configuration diagram of a hot water storage type hot water supply device according to a fifth embodiment of the present invention.

[Fig. 8] Fig. 8 is a configuration diagram of a hot water storage type water heater according to a sixth embodiment of the present invention.

FIG. 9 is a configuration diagram of a conventional hot water storage type water heater.

[Explanation of symbols]

5 hot water storage tank 6 circulation pumps 13 Heating means (heat pump) 15 Heat storage amount detection means 16 Operation control means 18 Daytime reheating function section 19 storage device 20 hours setting section 24 Driving presence / absence determination unit 25 Operation frequency calculation unit 26 Operating time calculator 27 Operation calorie calculator 28 Power consumption calculator

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takeshi Watanabe             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F term (reference) 3L024 CC05 DD22 DD23 EE11 GG04                       GG05 GG41 HH12 HH31 HH52

Claims (8)

[Claims] 1. A hot water storage tank, a circulation pump for extracting water in the hot water storage tank from the lower part and returning it to the upper part, a heating means for heating water circulated by the circulation pump, a daytime reheating function, and a daytime time zone. A hot water storage type hot water supply device comprising: a storage device for storing the operation information of the storage device; and a time setting unit for setting the boiling time of the next midnight time zone based on the operation information of the storage device. 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 time setting unit for setting the boiling time 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.