JP5147810B2 - Hot water system - Google Patents

Description

  The present invention relates to a hot water supply system including a hot water storage tank in which hot and cold water inside is heated using a heat pump.

  2. Description of the Related Art Conventionally, a hot water storage type hot water supply apparatus that stores hot water in a hot water storage tank and supplies hot water by hot water from the hot water storage tank is known (for example, see Patent Document 1 below). In this type of hot water storage type hot water supply apparatus, the hot water in the hot water storage tank is heated by a heat pump. In general, this heating operation is a time zone in which the night electricity rate is applied (for example, 8 hours from 23:00 to 7:00). To be done. That is, during the time period when the night electricity rate is applied, the hot water of the required amount for the day or the entire capacity of the hot water storage tank is stored, and the hot water stored in the hot water storage tank is used for hot water supply in the daytime. In this way, it is economically advantageous because the amount of hot water supplied during the daytime is boiled and stored in the hot water storage tank during the time period when the nighttime electricity rate, which is cheaper than the daytime electricity rate, is applied. Has been.

JP 2004-138299 A

  However, in the above-mentioned conventional system, when hot water runs out during daytime hot water supply (when there is not enough hot water in the hot water storage tank heated at the time when night electricity charges are applied), additional heating operation is performed during the daytime. Must be done at the time when the fee applies. When a hot water storage tank having a large capacity is provided to prevent such hot water shortage, there is a disadvantage that a large installation space is required. Furthermore, since the hot water storage tank has a temperature drop due to natural heat dissipation, it is difficult to maintain the temperature of the hot water heated up and stored in the hot water storage tank at night (for example, 12 hours or more) in the daytime.

  At present, the night electricity rate is applicable when the user contracts with the power company. Therefore, a user who cannot apply the nighttime electricity rate (that is, a user who applies a so-called metered-light contract that pays the same metered electricity rate as in the daytime) can apply the nighttime electricity rate. In the case of using a conventional hot water storage type hot water supply device that performs boiling operation in consideration of the above, even if the operation of boiling at night is performed, not only does the electricity charge become low, but it is extremely inefficient due to the natural heat dissipation of the hot water storage tank described above. It becomes economy.

  In view of the above points, the present invention reduces the temperature drop of hot water due to natural heat dissipation of a hot water storage tank, and a user who cannot apply a nighttime electricity charge performs hot water storage hot water supply with reduced running costs. It aims at providing the hot-water supply system which can do.

The present invention relates to a hot water storage tank, a heater for heating hot water in the hot water storage tank by a heat pump, a hot water pipe for deriving hot water in the hot water storage tank, a hot water supply pipe connected to the hot water storage tank and the hot water discharge pipe, A hot water heater that is provided in the middle of the hot water pipe downstream from the connecting portion between the hot water pipe and the water supply pipe, and that heats hot water flowing through the hot water pipe by combustion of a burner, and the heater and the hot water heater. A hot water supply system comprising an operation control means for controlling a hot water supply operation, wherein the operation control means divides a day into a plurality of time zones for each unit time and collects a hot water supply amount for each time zone. And a storage means for storing the hot water supply amount for each time zone collected by the hot water supply amount collection means, and a hot water supply amount for each time zone stored in the storage means, and the same for a predetermined number of days at a preset time Time An arithmetic means for calculating an average hot water supply amount for each zone, and each average hot water amount calculated by the arithmetic means as a target hot water storage amount of the hot water storage tank in each time zone, the hot water storage tank in each time zone becomes the target hot water storage amount. The heating control means for controlling the boiling operation of the hot water in the hot water storage tank by the heater , the hot water supply amount collecting means is the heater when the target hot water storage amount is maximized in each time zone The unit time of the time zone is set so that the time required for boiling by the maximum time is longer than the maximum time required for boiling , and the boiling control means is a preceding time zone preceding each time zone. Is set in the same unit time as the time period for collecting the hot water supply amount, and the heater is controlled so that the boiling operation corresponding to each set time period is performed in each preceding time period And wherein the Rukoto.

  According to the above configuration, the average hot water supply amount for each predetermined number of days (for example, 7 days) obtained from the data of the hot water supply amount collected at each sampling time zone is set as the target hot water storage amount of the hot water storage tank. Even if there is, it is possible to accurately determine the amount of hot water required by the user and supply it to the user.

  Furthermore, since each target hot water storage amount is applied to the preceding time zone corresponding to each sampling time zone, the hot water storage tank has sufficient hot water storage amount prior to the start time of the time zone when the user actually supplies hot water. Since the hot water in the hot water storage tank is used by the user within a relatively short time after the completion of boiling, the temperature drop of the hot water due to natural heat dissipation can be suppressed.

  If the user repeats the same life as when the target amount of hot water is collected, the hot water in the hot water storage tank is used up every time the user actually supplies hot water, so there is no waste. It is also possible to make the capacity of the battery relatively small. In addition, combined with the fact that the heat dissipation of hot water in the hot water storage tank is suppressed as described above, users who cannot apply the nighttime electricity rate (that is, the electricity rate with the same metering system as in the daytime even at nighttime). Even a so-called metered-light contract that pays the amount of water, the running amount can be kept low because the required amount of hot water rises in each time zone.

  In addition, even if the user supplies hot water exceeding the target hot water storage capacity of the hot water storage tank and the hot water storage tank becomes out of water, the hot water flowing through the tapping pipe can be quickly heated by the water heater. The amount of hot water required by the user can be reliably supplied.

Moreover, Te present invention smell, before Symbol the preceding preceding time time zone with time zone, to be set by the boiling control means so as to be short and the maximum water heating duration more than the unit time preferable.

  According to this, the target hot water storage amount of the hot water storage tank can be boiled within the unit time, and the boiling of the target hot water storage amount can be reliably completed within the preceding time of the preceding time zone.

The block diagram of the hot-water supply system of this invention. The block diagram which shows the functional structure of the tank controller shown in FIG. The figure which shows the relationship between the time slot | zone which extract | collects the amount of hot water supplies, and the time slot | zone which performs a boiling operation.

  Embodiments of the present invention will be described with reference to the drawings. Referring to FIG. 1, the hot water supply system of the present embodiment is configured by instantaneous heating type water heater 10, tank unit 30, and heat pump unit 60.

  The heat pump unit 60 (corresponding to the heater of the present invention) includes a heat pump 70 configured by connecting a compressor 71, a condenser 72, a decompressor 73, and an evaporator 74 through a refrigerant circulation path 75. . The condenser 72 is connected to a tank circulation path 64 connected to the upper and lower parts of the hot water storage tank 31, and exchanges heat between the refrigerant in the refrigerant circulation path 75 and the hot water in the tank circulation path 64, whereby the tank circulation path. The hot water in 64 is heated.

  The tank circulation path 64 includes a circulation pump 65 for circulating the hot water stored in the hot water storage tank 31 into the tank circulation path 64, and a forward thermistor for detecting the temperature of the hot water supplied from the condenser 72 to the hot water storage tank 31. 66 and a return thermistor 41 for detecting the temperature of the hot water supplied from the hot water storage tank 31 to the condenser 72 are provided.

  Then, a temperature detection signal from the forward thermistor 66 is input to the heat pump controller 80 which is an electronic unit composed of a microcomputer or the like. Further, the operation of the heat pump 70 and the circulation pump 65 is controlled by a control signal output from the heat pump controller 80.

  The heat pump controller 80 is communicably connected to the tank controller 50, and performs a boiling operation when receiving a hot water storage instruction signal from the tank controller 50. That is, using the boiling set temperature transmitted from the tank controller 50, the circulating pump 65 and the heat pump 70 are operated based on the detected temperature of the forward thermistor 66 and the detected temperature of the return thermistor 41, and hot water in the hot water storage tank 31. Is heated to the set boiling temperature.

  The tank unit 30 bypasses the hot water storage tank 31, the hot water discharge pipe 2 connected to the upper part of the hot water storage tank 31, the lower part of the hot water storage tank 31 and the hot water supply pipe 2, and the hot water heater 10. A hot water bypass pipe 37 that communicates the pipe 2 on the upstream side and the downstream side of the water heater 10 is provided. In the figure, reference numeral 3 denotes a curan.

  The tank unit 30 also includes a return thermistor 41 that detects the temperature of hot water supplied from the hot water storage tank 31 to the heat pump unit 60, and a hot water storage thermistor 42a, 42b, 42c, and 42d that detects the temperature of hot water stored in the hot water storage tank 31. , 42e and a hot water thermistor 33 provided in the vicinity of the upstream side of the connection point X between the hot water discharge pipe 2 and the water supply pipe 1, and a tank water amount sensor 43 for detecting the flow rate of water flow from the water supply pipe 1 to the hot water storage tank 31; The water thermistor 44 provided in the water supply pipe 1, the hot water variable valve 34 for changing the flow rate of hot water supplied from the hot water storage tank 31 to the hot water discharge pipe 2, and the flow rate of water supplied from the water supply pipe 1 to the hot water discharge pipe 2 Between the connecting point X of the tap water pipe 2 and the feed water pipe 1 and the tap water bypass pipe 37, the variable amount of water valve 35 for changing the pressure, the pressure reducing valve 40 with a check valve provided in the feed water pipe 1 The provided mixing thermistor 36, the bypass valve 38 for opening and closing the hot water bypass pipe 37, and the hot water outlet thermistor 39 for detecting the temperature of the hot water supplied to the downstream side of the connection point Y between the hot water bypass pipe 37 and the hot water pipe 2. And.

  The temperature detection signals from the hot water storage thermistors 42 a to 42 e, the hot water thermistors 33, the hot water thermistors 44, the mixed thermistors 36, the hot water outlet thermistors 39, and the return thermistors 41 are sent to the tank controller 50 that is an electronic unit composed of a microcomputer or the like. The detection signal of the water flow rate of the water supply pipe 1 by the tank water amount sensor 43 is input. Further, the operation of the hot water variable valve 34, the water variable valve 35, and the bypass valve 38 is controlled by a control signal output from the tank controller 50.

  The tank controller 50 monitors the detected temperatures of the return thermistor 41 and the hot water storage thermistors 42a to 42e, and transmits the hot water storage heating instruction signal described above to the heat pump controller 80 based on the detected temperatures. Thereby, the hot water in the hot water storage tank 31 is heated to the boiling temperature set by the heat pump unit 60.

  The tank controller 50 is supplied to the bathtub via a desired hot water supply temperature (temperature of hot water supplied from the outlet of the hot water outlet pipe 2) and bath temperature (hot water filling pipe 18 described later) according to the operation of the user. A temperature switch (not shown) for setting the temperature of the hot water, a general hot water supply mode (a mode in which hot water filling valve 19 which will be described later is closed and hot water is supplied from the outlet of hot water pipe 2), and a hot water filling mode A remote controller 51 including a mode changeover switch (not shown) for switching between (a mode in which the hot water valve 19 is opened and hot water is supplied from the hot water pipe 18 to the bathtub) is connected.

  The hot water discharge pipe 2 is connected to the upper part of the hot water storage tank 31, and the water supply pipe 1 is connected to the lower part of the hot water storage tank 31. Therefore, when hot water is supplied from the hot water storage tank 31 to the hot water discharge pipe 2, water is supplied from the water supply pipe 1 to the lower part of the hot water storage tank 31 accordingly. The amount of water supplied from the water supply pipe 1 to the hot water storage tank 31 corresponds to the amount of decrease in hot water in the hot water storage tank 31 (that is, the amount of hot water discharged from the hot water storage tank 31), and the hot water storage tank 31 is always filled with hot water. It becomes a state. The amount of hot water discharged from the hot water storage tank 31 is detected by a tank water amount sensor 43.

  In the hot water storage tank 31, a hot water layer is formed at the top and a water layer is formed at the bottom (temperature stratification). When the hot water is discharged from the hot water storage tank 31, the upper hot water layer is reduced accordingly. The hot water storage tank 31 is provided with the hot water storage thermistors 42a to 42e in the vertical direction, and the hot water storage amounts corresponding to the positions of the hot water storage thermistors 42a to 42e are known in advance, so the temperatures of the hot water storage thermistors 42a to 42e are confirmed. By doing so, it is possible to grasp the current hot water storage amount.

  The detected temperature of the hot water storage thermistor 42a at the uppermost position is the target hot water temperature set by the remote controller 51 (the hot water set temperature set by the remote controller 51 in the general hot water supply mode, and the bath set temperature set by the remote controller 51 in the hot water filling mode. ) When it becomes below, it becomes out of hot water.

  It should be noted that whether the hot water storage tank 31 is in a hot water condition is determined when the detected temperature of the hot water storage thermistor 42a at the uppermost position is equal to or lower than a preset hot water temperature determination temperature. If there is. Further, the amount of hot water discharged from the hot water storage tank 31 can be grasped by the tank water amount sensor 43 as described above.

  When the tank water amount sensor 43 detects water flow exceeding a predetermined lower limit flow rate in a state where hot water has not run out, the tank controller 50 causes the detected temperature of the mixed thermistor 36 or the hot water supply outlet thermistor 39 to become the target temperature. In addition, mixed temperature control for controlling the opening degree of the hot water variable valve 34 and the water variable valve 35 is performed. At this time, the tank controller 50 opens the bypass valve 38 in the general hot water supply mode, and closes the bypass valve 38 in the hot water filling mode.

  On the other hand, when a water flow exceeding the lower limit water amount is detected by the tank water amount sensor 43 in a state where the hot water has run out, the tank controller 50 closes the bypass valve 38 and removes from the hot water storage tank 31 and the water supply pipe 1. All the hot water is supplied to the water heater 10. In this case, the heating temperature adjustment control is executed in the water heater 10.

  The water heater 10 includes a heat exchanger 11 provided in the middle of the tapping pipe 2, a burner 12 that heats the heat exchanger 11, a bypass of the heat exchanger 11, and the tapping pipe 2 is arranged upstream of the heat exchanger 11. A hot water supply bypass pipe 13 communicating with the downstream side and a hot water filling pipe 18 connecting the bathtub (not shown) and the hot water supply pipe 2 on the downstream side of the connection point Z between the hot water supply pipe 2 and the hot water supply bypass pipe 13. Yes.

  The outlet pipe 2 is supplied to a bypass servo 14 that changes the distribution ratio between the flow rate of hot water supplied to the heat exchanger 11 side and the flow rate of hot water supplied to the hot water supply bypass pipe 13 side, and the hot water heater 10. A water amount servo 15 that adjusts the flow rate of hot water, a hot water amount sensor 21 that detects the flow rate of hot water supplied to the heat exchanger 11 and the hot water supply bypass pipe 13, and downstream of the connection point Z between the hot water discharge pipe 2 and the hot water supply bypass pipe 13. A hot water heater thermistor 16 for detecting the temperature of hot water supplied to the side and a check valve 17 are provided. Further, the hot water filling pipe 18 is provided with a hot water filling amount sensor 22 for detecting the flow rate of the hot water filling pipe 18 and a hot water filling valve 19 for opening and closing the hot water filling pipe 18.

  A temperature detection signal from the water heater thermistor 16, a water flow rate detection signal from the hot water sensor 21, and a water flow rate from the hot water sensor 22 are supplied to the hot water controller 20, which is an electronic unit composed of a microcomputer or the like. The detection signal is input. Further, the operation of the bypass servo 14, the water amount servo 15, the burner 12, and the hot water filling valve 19 is controlled by a control signal output from the hot water supply controller 20.

  The hot water supply controller 20 is communicably connected to the tank controller 50 and enters a heating permission state when receiving a signal for instructing heating from the tank controller 50. When the hot water supply amount sensor 21 detects water flow exceeding a predetermined lower limit flow rate, the heating temperature control for controlling the combustion amount of the burner 12 so that the temperature detected by the water heater thermistor 16 becomes the target hot water supply temperature. Execute control. Further, when a signal for instructing heating is received from the tank controller 50, the heating is prohibited and execution of the heating temperature control is prohibited.

  Further, the hot water supply controller 20 opens the hot water filling valve 19 when the hot water filling operation for supplying a predetermined amount of hot water to a bathtub (not shown) (hot water filling mode) is performed by the hot water filling water amount sensor 22. Accumulate the amount of hot water supplied to the detected bathtub. When the cumulative amount of hot water supplied to the bathtub reaches the predetermined amount, the hot water filling valve 19 is closed to end the hot water filling operation.

  The heat pump controller 80, the tank controller 50, and the hot water supply controller 20 constitute the operation control means in the present invention.

  Moreover, in this embodiment, although it abbreviate | omitted about the hot water heating function and the bath reheating function, when constructing the hot water supply system provided with a hot water heating function, for example, although not illustrated, the water heater 10 is a heat exchanger for heating. In addition, a heating burner for heating the heating terminal may be additionally provided, and the forward pipe and the return pipe of the heating terminal may be connected to the outlet pipe and the inlet pipe of the heating heat exchanger, respectively. Furthermore, if a hot water storage tank 31 is provided with a heating heat exchange circuit and heat exchange is performed with a heating return pipe via a liquid-liquid heat exchanger, heat can be advantageously supplied to the hot water in the hot water storage tank 31. Furthermore, a bath replenishment function can be obtained by exchanging heat with the bath circulation path via a liquid-liquid heat exchanger in the heating forward pipe.

  Next, the configuration and operation of the tank controller 50 corresponding to the gist of the present invention will be described. As shown in FIG. 2, the tank controller 50 includes a clock unit 50 a, a hot water supply amount collection unit 50 b (hot water supply amount collection unit), a storage unit 50 c (storage unit), a calculation unit 50 d (calculation unit), A control unit 50e (boiling control means) is functionally provided.

  The clock unit 50a outputs the current time. The hot water supply amount collecting unit 50b divides one day (24 hours) into six time zones every 4 hours (unit time), and integrates the output of the tank water amount sensor 43 for each time zone. Collect as data corresponding to the amount of hot water.

  In the present embodiment, as shown in FIG. 3, each data collection time zone is defined as 2:00 <current time <6:00, 6:00 <current time <10, where the day break is 2:00 am 0:00, 10: 00 ≦ current time <14:00, 14: 00 ≦ current time <18:00, 18: 00 ≦ current time <22:00, 22: 00 ≦ current time <2:00 did.

  The storage unit 50c stores data collected by the hot water supply amount collecting unit 50b for seven days (one week) in a predetermined area for each collection time zone. The storage unit 50c stores a total of 42 pieces of data for 7 days, but when the latest collection data is stored for each collection time period, the oldest collection data is deleted. As a result, the latest seven days of collected data are always stored in the storage unit 50c.

  When it becomes 2:00 every day, the calculation unit 50d calculates the average value (average hot water supply amount) of the collection data for each collection time period for 7 days using the collection data stored in the storage unit 50c. The average value for each time zone is written in the average value area prepared in the storage unit 50c.

  The boiling control unit 50e sets the average value of the collected data for each sampling time period stored in the storage unit 50c as the target hot water storage amount of the hot water storage tank 31, and the hot water storage tank 31 sets the target hot water storage amount, that is, the target hot water storage amount. A hot water storage heating instruction signal is transmitted to the heat pump controller 80 so that the corresponding hot water storage thermistor reaches the hot water storage upper limit temperature. Receiving the hot water storage heating instruction signal, the heat pump controller 80 operates the circulating pump 65 and the heat pump 70 to perform boiling water heating operation in the hot water storage tank 31 as described above.

  In addition, in the area for average values of the storage unit 50c, standard values are stored in advance for each sampling time period, and in the initial operation of the hot water supply system (operation for 6 days after installation in a house or the like). When the operation based on this standard value is performed and all 42 data for 7 days are obtained, this standard value is rewritten to the average value calculated by the calculation unit 50d.

  Here, the unit time of each data collection time zone may be other than 4 hours, but in this embodiment, one day is divided into 6 time zones, and the starting point is set to 2:00 at midnight for the following reason. by. For example, if the unit time is 2 hours, the number of data to be collected increases and becomes complicated. When the unit time is 6 hours, the number of data to be collected is small, but the data corresponding to the amount of hot water supply is a large value. In addition, if the unit time is 4 hours and the day is divided into 6 time zones and the starting point is midnight, the hot water supply is expected to be the largest in the general daily life cycle. There is an advantage that the time zone (18: 00 to 22:00) can be accommodated in one time zone.

  In addition, the unit time of each data collection time zone also takes into account the time required for boiling the hot water storage tank 31. That is, the unit time is set to a time longer than the time required for boiling the maximum target hot water storage amount (maximum boiling time) in all the sampling time zones. More preferably, a unit time longer than the required boiling time of the maximum hot water storage amount of the hot water storage tank 31 is employed. As a result, the hot water storage tank 31 can be prevented from running out of hot water in any time zone.

  By the way, when the boiling operation of hot water in the hot water storage tank 31 is started at the start time of the same time zone as the time when the target hot water storage amount is collected, it takes time for the hot water to be heated. There is a risk that it will not be in time. Specifically, even if an attempt is made to obtain the target hot water storage amount in the time zone from 18:00 to 22:00 by the boiling operation started from 18:00, for example, the maximum hot water storage amount of the hot water storage tank 31 (120 in this embodiment). Liter) of boiling time is required for one hour, so that a sufficient amount of hot water cannot be supplied from the hot water storage tank 31 unless it is after 19:00.

  Therefore, as shown in FIG. 3, the boiling control unit 50e sets, for control, a preceding time zone in which each sampling time zone is advanced by 2 hours, and the sampling time zone that is a setting target in this preceding time zone. The boiling operation is performed by applying a target hot water storage amount corresponding to the above. The unit time of the preceding time zone is the same as the sampling time zone.

That is, the target hot water storage amount by the average value of each sampling time period calculated at 2:00 (average hot water supply amount) by the calculation unit 50d, the first 4 hours (2:00 to 6:00) target amount of hot water storage for the Only 2:00 to 4:00 on the day and 0:00 to 2:00 on the next day (22 hours later), and each time zone after the second 4 hours (6:00 to 10:00) Applies to the preceding time zone of the day respectively.

By carrying out like this, the hot water storage of the target hot water storage amount to the hot water storage tank 31 can be performed prior to the start time of the sampling time zone, and the hot water supply amount required in the sampling time zone can be reliably ensured. Further, even if the boiling of the hot water in the hot water storage tank 31 is completed in the preceding time zone, there is only a difference of 2 hours between the preceding time zone and the sampling time zone. The temperature drop can be minimized.

  As described above, in the boiling control unit 50e, the average hot water supply amount every 7 days obtained from the hot water supply amount data collected in each sampling time zone is set as the target hot water storage amount of the hot water storage tank 31, so that each target hot water storage amount is In the time zone in which the user actually supplies hot water (that is, the same time zone as the sampling time zone), the amount of hot water required by the user can be sufficiently supplied with high probability. In addition, since each target hot water storage amount is applied to the preceding time zone corresponding to each sampling time zone, at a time slightly before the time zone during which the user actually supplies hot water (in this embodiment, one hour before). Since the hot water storage tank 31 becomes the target hot water storage amount, the time from the completion of boiling of the hot water in the hot water storage tank 31 to the hot water supply is short, and natural heat radiation can be sufficiently suppressed. If the user repeats the same life as when the target amount of stored hot water is collected, the hot water in the hot water storage tank 31 is used up every time the user actually supplies hot water, so there is no waste. Coupled with the short heat dissipation time of the hot water in the tank 31, a user who cannot apply the nighttime electricity rate (that is, a so-called metered lamp contract that pays the same metered electricity rate as the daytime even at night) Even if the user is applied), the running cost can be kept low.

  In the unlikely event that the user supplies hot water exceeding the target hot water storage amount of the hot water storage tank 31, the hot water storage tank 31 becomes in a state of running out of hot water. Since the signal which instruct | indicates heating permission is transmitted with respect to the hot water supply controller 20, and the heating temperature control control by the water heater 10 is performed rapidly, the amount of hot water which a user requires can be reliably performed.

  DESCRIPTION OF SYMBOLS 1 ... Water supply pipe, 2 ... Hot water pipe, X ... Connection part (connection location), 10 ... Hot water heater, 12 ... Burner, 31 ... Hot water storage tank, 50b ... Hot water supply amount collection part (hot water supply amount collection means), 50c ... Storage part (Storage means), 50d ... Calculation section (calculation means), 50e ... Boiling control section (boiling control means), 60 ... Heat pump unit (heating machine), 70 ... Heat pump.

Claims (2)

A hot water storage tank, a heater for heating hot water in the hot water storage tank by a heat pump, a hot water pipe for deriving hot water in the hot water storage tank, a water supply pipe connected to the hot water storage tank and the hot water pipe, and the hot water pipe And a hot water heater that is provided in the middle of the hot water pipe downstream from the connection between the hot water pipe and the hot water heater that heats hot water flowing through the hot water pipe by combustion of a burner, and controls a hot water supply operation by the heater and the hot water heater A hot water supply system comprising an operation control means for
The operation control means includes a hot water supply amount collecting means for dividing a day into a plurality of time zones every unit time and collecting a hot water supply amount for each time zone, and a hot water supply for each time zone collected by the hot water supply amount collection means. A storage means for storing the amount; an arithmetic means for calculating an average hot water supply amount for each same time zone in a predetermined number of days at a preset time using the hot water supply amount for each time zone stored in the storage means; Using each average hot water supply amount calculated by the calculation means as a target hot water storage amount of the hot water storage tank in each time zone, the hot water boiling operation of the hot water storage tank by the heater so that the hot water storage tank becomes the target hot water storage amount in each time zone Heating control means for controlling
The hot water supply amount collecting means takes the time required for boiling by the heater when the target hot water storage amount is maximized in each time zone, and sets the time period longer than the maximum boiling time required. Set the unit time,
The heating control means sets the preceding time zone preceding each time zone in the same unit time as the time zone for collecting the hot water supply amount, and the time zone that is the setting target in each preceding time zone The hot water supply system is characterized in that the heater is controlled so that the boiling operation corresponding to is performed. Hot water system smell of claim 1 wherein Te,
The said previous previous time time zone for the previous SL hours, hot water supply system, characterized in that it is set by the boiling control means so as to be short and the maximum water heating duration more than the unit time.

Images