JP6040348B2 - Hot water system - Google Patents

Description

  The present invention relates to a hot water supply system that is interlocked by connecting a plurality of hot water supply apparatuses via a system controller.

  Conventionally, when installing a large bathtub, in order to shorten the filling time to the bathtub, a plurality of hot water supply devices are juxtaposed to the bathtub, and a plurality of hot water supply devices are connected via a system controller. A hot water supply system interlocked with each other is disclosed, for example, in Patent Document 1 below.

  In the hot-water supply system shown in FIG. 8 of Patent Document 1, each hot-water supply device can be used for general households that can operate alone, and includes a hot-water supply device incorporating a hot-water supply controller as a subordinate control device. And a remote controller as a host control device. Each remote controller has a built-in clock for measuring time, and each remote controller performs time measurement and time display.

  In addition, each hot water supply device is configured to be able to perform predetermined timer reservation operation such as bath automatic operation.For example, in the case of bath automatic operation, when the time when the bath is heated with the remote control and timer reservation is turned on, The bath automatic setting data including the time to boil from the remote control to the water heater controller is sent, the hot water controller calculates the hot water start time according to the hot water supply capacity, and the current supplied from the remote control via the communication line When the time data reaches the hot water supply start time, the water heater controller starts the hot water supply operation control.

JP 2002-130822 A

  The built-in clock is generally configured to count the time using a crystal oscillator transmission circuit. However, since each quartz oscillator has an inherent error, there is 1 between the built-in clocks of a plurality of remote controllers. An error of about 30 seconds may occur in a month, and different times are displayed between the remote controls despite being in the same system. In the hot water supply system shown in FIG. 8 of Patent Document 1, when the current time indicated by the built-in clock of each remote controller is corrected manually, the time adjusted data is transmitted to the remote controller of another hot water supply device. However, if the user does not correct the current time for a long period of time, the built-in clock of each remote controller may shift by a few minutes.

  Further, in the conventional hot water supply system, when automatic bath operation is set with any one of the remote controllers, the system controller is configured to send automatic bath setting data to the water heater controllers of all hot water supply devices. However, it is possible to perform batch setting for automatic hot water operation of all hot water supply devices, but each hot water supply device individually manages the current time data with the internal clock of each remote controller. If the current time data deviates in units of several minutes, the bath automatic start time by each hot water supply device also deviates in units of minutes, and there is a problem that it takes too much time to complete the bath automatic.

  Therefore, an object of the present invention is to constantly monitor a built-in clock of each hot water supply device in a hot water supply system in which a plurality of hot water supply devices are connected by a system controller, and to prevent the respective times from deviating greatly.

  In order to achieve the above object, the present invention takes the following technical means.

That is, the present invention includes a plurality of water heaters, and each water heater includes control means for performing timer reservation operation control based on current time data counted by a built-in clock, and the control means for the plurality of water heaters is a system. In a hot water supply system electrically interconnected via a controller, the system controller includes a time monitoring unit that monitors current time data counted by a built-in clock of each control means, and the time based on a plurality of current time data The monitoring unit performs a predetermined time correction process (claims 1 , 5, 8, 10 ).

  According to the hot water supply system of the present invention, the time monitoring unit of the system controller monitors the current time data in each hot water supply device, and when the predetermined condition is satisfied, the time correction processing is performed on each built-in clock. Even if the time is not adjusted manually, the built-in clocks of all the hot water supply devices are not greatly shifted. In addition, since the system controller is equipped with a time monitoring unit, it is possible to prevent a shift in current time data between a plurality of hot water supply devices while using mass-produced products as each hot water supply device, and to reduce the cost of the entire system. Become. The current time data monitored by the time monitoring unit may include “hour” data and “minute” data, but not “second” data. Of course, the internal data of each built-in clock also counts seconds, but it is normal to output time data that does not include seconds as time data for displaying the current time and setting various reservation times.

In the hot water supply system of the present invention, the time correction processing is performed in accordance with current time data counted by a built-in clock of any one of the control means when a difference of a predetermined value or more occurs in a plurality of current time data. This may be a process of correcting the built-in clock (claim 11 ). According to this, for example, when each current time data is composed of “hour” data and “minute” data, and a difference of 2 minutes or more occurs between a plurality of current time data, it is adjusted to one of the built-in clocks. By correcting other internal clocks, a plurality of current time data can be matched. Here, the difference between a plurality of current time data is not set to one minute. Even when a slight deviation of less than one second occurs, a plurality of current time data are instantaneously counted when “minute” data is counted. This is because a time correction process is performed by the system controller every minute since a 1-minute shift occurs.

In addition, the time monitoring unit includes a determination unit that determines the most accurate internal clock among the internal clocks of the plurality of control units, and the time correction processing causes a difference of a predetermined value or more in a plurality of current time data. may be a process of correcting the other internal clock in accordance with the current time data the determined internal clock counts to be the most accurate by determining means when (claim 12). Until the data necessary for the determination by the determination means is obtained, other internal clocks can be corrected in accordance with a predetermined internal clock. As the determination means, for example, when another internal clock is corrected in accordance with a predetermined internal clock, the difference between the current time data before and after the correction is stored, and the time by manual operation of the internal clock of any control means When time adjustment is performed, the most accurate built-in clock can be determined based on the correlation between the correction amount by the time adjustment and the difference between the current time data before and after the correction. According to this, the deviation from the standard time of the current time data of the entire system can be reduced.

The time correction process may be a process of correcting each internal clock in accordance with the average time of the internal clocks of the plurality of control means when a difference of a predetermined value or more occurs in the plurality of current time data. Item 1 ). According to this, the deviation of each built-in clock with respect to the standard time can be averaged to prevent the current time data of the entire system from greatly deviating from the standard time.

Each control means is configured to be able to adjust the time of the built-in clock by manual operation, and when the time is adjusted by manual operation in any of the control means, the system controller adjusts to the time after the execution. the time setting of the internal clock other control means can be configured to perform (claim 13). According to this, it becomes possible to set the time of all the built-in clocks to an accurate time when the time is set manually.

Further, the control unit is turned on / off operably configured for timer reservation operation, when the timer reservation operation is off the system controller can be configured not to perform predetermined processing of time correction (claim 2 , 5 ). According to this, the amount of communication data in the system controller and each control means can be reduced as much as possible by performing the predetermined time correction processing only when necessary.

Each control means is configured so that timer reservation operation can be turned on / off, and the time monitoring unit of the system controller performs a predetermined time correction process when the timer reservation operation is switched from off to on. (Claims 3, 6, 8 ). According to this, it becomes possible to set all the built-in clocks at the start of the reservation with the timer reservation operation set to ON as a trigger.

The control unit may be configured to perform a predetermined process at a predetermined time, and the time monitoring unit may be configured not to perform time correction across the predetermined time . 7, 9, 10 ). According to this, for example, as in the energy usage amount display device disclosed in Japanese Patent No. 4294049, the control unit of the hot water supply device counts the usage amount of gas, water, or electricity at time 0 (predetermined time) (predetermined). If the built-in clock is corrected beyond the time 0 minute, the data may not be collected properly. However, in the present invention, the time correction over a predetermined time is prohibited. Thus, it is possible to avoid the occurrence of trouble in the predetermined processing performed at the predetermined time.

More specifically, each control means includes a water heater controller as a low-order control device that performs timer reservation operation control, a remote controller as a high-order control device having the built-in clock, and these water heater controller and remote controller. The remote controller is configured to send a timer reservation command signal to the water heater controller and current time data counted by a built-in clock to the communication line, and the system controller is connected to the communication line. Are connected to each other, and the system controller sends the command signal sent to the communication line of each control means to the communication line of the other control means so that the reserved operations of the plurality of water heater controllers are linked to each other. In the time correction process, the correction time is sent to the communication line of the control means to be processed. It can be assumed to be configured to (claim 14). According to this, the timer reservation command signal is sent to the water heater controller via the communication line when various reservation operation setting operations are performed by the remote controller, and the water heater controller performs timer reservation operation control such as automatic bathing. I do. The current time data can be made up of hour and minute data. When the minute data is updated, it is sent from the remote control to the communication line and supplied to the water heater controller and system controller connected to the communication line. Is done. The system controller sends the command signal sent to the communication line of each control means to the communication line of the other control means, so that a setting operation for the reserved operation is performed by one of the remote controllers. The controller reserved operation can be set all at once. Further, the system controller can transmit the correction time to each remote controller by sending the correction time as the current time to the communication line of the control means that is the target of the time correction process as the predetermined time correction process. When the time data is received via the communication line, the remote controller can be configured to adjust the built-in clock to the correction time.

According to the hot water supply system according to the first , fifth, eighth and tenth aspects of the present invention, the time monitoring unit of the system controller monitors the current time data in each hot water supply device and satisfies each predetermined condition. On the other hand, since the time correction processing is performed, the built-in clocks of all the hot water supply devices are not greatly shifted without time adjustment by manual operation. In addition, since the system controller is equipped with a time monitoring unit, it is possible to prevent a shift in current time data between a plurality of hot water supply devices while using mass-produced products as each hot water supply device, and to reduce the cost of the entire system. Become. The current time data monitored by the time monitoring unit may include “hour” data and “minute” data, but not “second” data.

Further, according to the hot water supply system according to claim 11 of the present invention, for example, each current time data is composed of “hour” data and “minute” data, and a difference of 2 minutes or more occurs between a plurality of current time data. Sometimes, by correcting other internal clocks according to any one of the internal clocks, a plurality of current time data can be matched.

Moreover, according to the hot water supply system according to claim 12 of the present invention, it is possible to reduce the deviation of the current time data of the entire system from the standard time.

Further, according to the hot water supply system according to claim 1 of the present invention, it is possible to prevent the current time data for the entire system by averaging the deviation to the standard time of each internal clock is shifted from the larger standard time.

According to the hot water supply system of the thirteenth aspect of the present invention, it is possible to set the time of all the built-in clocks to an accurate time when the time is set manually.

According to the hot water supply system according to claims 2 and 5 of the present invention, the amount of communication data in the system controller and each control means can be reduced as much as possible by performing a predetermined time correction process only when necessary. it can.

Further, according to the hot water supply system according to claims 3 , 6, and 8 of the present invention, it is possible to set all the built-in clocks at the start of the reservation, triggered by the timer reservation operation being set to ON.

Further, according to the hot water supply system according to claims 4, 7, 9 , and 10 of the present invention, the control means of the hot water supply device is set to 0 minutes at time 0 like the energy usage amount display device disclosed in Japanese Patent No. 4294049, for example. There is a risk that data cannot be collected properly if the built-in clock is corrected beyond the time of 0 minutes when the usage (predetermined processing) of gas, water or electricity usage is performed at (predetermined time). However, in the present invention, it is possible to avoid a problem in the predetermined processing performed at the predetermined time by prohibiting the time correction across the predetermined time.

In the hot water supply system according to claim 14 of the present invention, the timer reservation command signal is sent to the water heater controller via the communication line when various reservation operation setting operations are performed by the remote controller. The device controller performs timer reservation operation control such as bath automatic. The current time data can be made up of hour and minute data. When the minute data is updated, it is sent from the remote control to the communication line and supplied to the water heater controller and system controller connected to the communication line. Is done. The system controller sends the command signal sent to the communication line of each control means to the communication line of the other control means, so that a setting operation for the reserved operation is performed by one of the remote controllers. The controller reserved operation can be set all at once. Further, the system controller can transmit the correction time to each remote controller by sending the correction time as the current time to the communication line of the control means that is the target of the time correction process as the predetermined time correction process. When the time data is received via the communication line, the remote controller can be configured to adjust the built-in clock to the correction time.

It is a schematic structure figure of a hot-water supply system concerning one embodiment of the present invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

  FIG. 1 shows a hot water supply system according to an embodiment of the present invention, and the hot water supply system is configured as a connected hot water supply system in which first and second hot water supply devices 2 and 3 are connected to a system controller 1. In addition, hot water supply or the like can be performed from both the hot water supply apparatuses 2 and 3 to the large bathtub 4 through the bath pipes 20 and 30 at the same time.

  Each of the hot water supply devices 2 and 3 is mainly composed of instantaneous gas water heaters 21 and 31 as heat sources and control means for performing various controls such as timer reservation operation control based on current time data counted by a built-in clock. The control means electrically connects the kitchen remote controllers 22 and 32 having the built-in clock, the water heater controllers 23 and 33 incorporated in the water heaters 21 and 31, and the remote controllers 22 and 32 and the water heater controllers 23 and 33. And two-core communication lines 24 and 34 connected to each other. In FIG. 1, the control means of the hot water supply device 2 on the left side further includes a bathroom remote controller 25, and the bathroom remote controller 25 is also connected to the communication line 24.

  As each of the water heaters 21 and 31, a water heater having the same capacity may be used, or a water heater having a different capacity may be used. Each of the water heaters 21 and 31 can be used for various purposes such as hot water supply to the hot tub 4, hot water supply to a hot water tap, and hot water supply to various heating devices such as a floor heating device. Thus, hot water may be supplied only by any one of the water heaters, or hot water may be supplied with a large capacity by a plurality of water heaters.

  The kitchen remote controllers 22 and 32 have a display screen and various operation buttons, and also have a built-in clock composed of a crystal oscillator circuit and a current time counter, and the current time counted by the built-in clock. Each time the current time data consisting of the data is updated, that is, every time 1 minute data is added, the current time data is sent to the communication lines 24 and 34 as indicated by an arrow A in FIG. It is configured. Note that the built-in clock is configured so that the time can be adjusted by manual operation of a predetermined operation button. During the time adjustment, the time is being adjusted to prevent various controls based on the current time from being inadvertently started. Is transmitted to the communication lines 24 and 34.

  In addition, when various timer reservation operations such as heating operation and automatic bath operation are performed, the kitchen remote controllers 22 and 32 send command signals corresponding to the respective operations to the communication lines 24 and 34. Similarly, the bathroom remote controller 25 is also configured to be able to send command signals corresponding to various operations to the communication lines 24 and 34. However, the bathroom remote controller 25 is not equipped with a built-in clock, and the kitchen remote controller 22 Received current time data is received and displayed on the display screen as the current time. The kitchen remote controllers 22 and 32 are configured to correct the internal clock to the current time data when the current time data is sent from the other devices to the communication lines 24 and 34 and received. . Each of these remote controllers 22, 32, and 25 functions as a host controller for the water heater controllers 23 and 33.

  The water heater controllers 23 and 33 are connected to the respective communication lines 24 and 34, and perform lowering operations of gas burners, combustion fans, pumps and the like constituting the water heater in accordance with various command signals from the remote controllers 22, 32, and 25. It functions as a control device. The control contents of the water heater controllers 23 and 33 can be various conventionally known ones. For example, the automatic bath operation of the first hot water supply device 2 is set via the kitchen remote controller 22 as an example of the timer reservation operation. Then, the bath automatic data including the boiling time and the amount of hot water filling is sent from the remote controller 2 to the communication line 24 as shown by the arrow B in FIG. 1, and the water heater controller 23 sends the bath automatic data through the communication line 24. When received, the boiling time is stored and the hot water start time is calculated according to the hot water supply capacity. When the current time data separately supplied from the kitchen remote controller 22 reaches the hot water start time, the large bathtub 4 Control to supply hot water to. In this embodiment, since the two hot water supply devices 2 and 3 are automatically operated at the same time, the calculation of the hot water supply start time and the end of the hot water supply operation by the automatic bath operation take into account the total capacity of both hot water supply devices, Moreover, it is possible to perform control linked appropriately as needed.

  In addition, the water heater controllers 23 and 33 and the remote controllers 22 and 32 of the present embodiment have a predetermined time (for example, 0 minutes per hour or 30 minutes per hour), similarly to the energy usage display device disclosed in Japanese Patent No. 4294949. Etc.) can be configured to perform integrated display processing of gas, water or electricity usage.

  The system controller 1 includes a CPU and storage means. When various command signals are received from the communication lines 24 and 34 of the hot water supply devices 2 and 3, the system controller 1 selects the command signals according to preprogrammed conditions, and supplies other hot water supplies. By sending command signals to the communication lines 24 and 34 of the devices 2 and 3, the plurality of hot water supply devices 2 and 3 are linked. For example, when the system controller 1 receives the automatic bathing data (timer reservation command signal) from the kitchen remote controller 22 of the first hot water supply device 2 via the communication line 24, it is determined that the data relates to the bathing automatic. In order to cause the water heater controller 33 of the second hot water supply device 3 to perform automatic setting, the automatic bath temperature data is sent to the communication line 34 of the second hot water supply device 3. In addition, according to the system configuration, user requests, etc., other command signals should also be sent to the communication lines of other hot water supply devices, or command signals related to operations that do not want to be linked should be sent. Can do.

  Further, the system controller 1 stores the current time data received via the communication lines 24 and 34 of the hot water supply devices 2 and 3 in the storage means, and the difference between the plurality of current time data is shifted by 2 minutes or more. A time monitoring unit that monitors whether or not there is, and the time monitoring unit is configured by a CPU that executes a monitoring program stored in a storage unit. The time monitoring unit performs a predetermined time correction process so that the current times of all the built-in clocks are matched when the current time data in each of the water heaters 2 and 3 is shifted by 2 minutes or more.

  This time correction processing may be various, for example, current time data counted by the built-in clock of the kitchen remote controller 22 of the first hot water supply device 2 when a difference of two minutes or more occurs in a plurality of current time data. 1 is sent to the communication line 34 of the second hot water supply device 3 as indicated by an arrow D in FIG. 1, the built-in clock of the kitchen remote control 32 of the second hot water supply device 3 can be corrected. The time correction processing calculates the average time of the current time data of the built-in clocks of the plurality of kitchen remote controllers 22 and 32 when a difference of two minutes or more occurs in the plurality of current time data, and calculates the average time as the current time By sending the time data to the communication lines 24 and 34 of all the water heaters 2 and 3, the internal clocks of all the water heaters 2 and 3 can be corrected to the average time.

  The time monitoring unit may include a determination unit that determines the most accurate internal clock among the internal clocks of the plurality of kitchen remote controllers 22 and 32. Such determination means can adopt various configurations. For example, it stores a difference between current time data before and after correction when time correction processing of another internal clock is performed in accordance with a predetermined internal clock. This is a program that determines the most accurate built-in clock by comparing the correction amount of the clock and the difference between the current time data before and after the correction when the time is set manually by the built-in clock. can do. When such a determination means is provided, the time correction processing is performed by the current time counted by the built-in clock that is determined to be most accurate by the determination means when a difference of two minutes or more occurs in a plurality of current time data. Other internal clocks can be corrected according to the time data.

  The above-described monitoring and time correction processing by the time monitoring unit can be performed at all times in principle in the system controller 1, but when timer reservation operation such as automatic bathing operation is set to OFF, the display time by each remote controller The predetermined time correction process may not be performed because there is no problem in control just by shifting. However, if the timer reservation operation is not used for a long time, there is a possibility that a large time lag has occurred. Therefore, the timer reservation operation is switched from off to on with one of the remote controllers 22, 32, 25. It is sometimes preferable that the time monitoring unit of the system controller 1 performs a predetermined time correction process.

  However, as described above, when a configuration for performing a predetermined process such as an integrated display process of gas, water, or electricity usage at a predetermined time, for example, 0 minutes every hour, the predetermined time is crossed. It is preferable to configure the program of the time monitoring unit so as to prohibit the time correction process. For example, it is configured to correct the current time data on the second hot water supply device 3 side in accordance with the current time data on the first hot water supply device 2 side, and the current time on the first hot water supply device 2 side is configured. If the data indicates 12:59 and the current time data on the second hot water supply device 3 side indicates 1:01 minutes, the current time data on the second hot water supply device 3 side is normally corrected to 12:59. However, since this time correction is a correction process over 0 minutes per hour, this process is not performed. If the above process is performed, the process over 0 minutes is performed again, and the process of integrating the usage amount of gas, water, or electricity is performed again. is there.

  In addition to the time correction processing described above, when the time is set manually by any of the kitchen remote controllers 22 and 32, the system controller 1 transmits the current time data after the time adjustment to the communication of the other hot water supply devices 3. It is preferable that the built-in clock of the other kitchen remote controller 32 is corrected in accordance with the current time after the time adjustment by sending it to the line 34.

  According to the hot water supply system according to the present embodiment described above, when automatic bath operation (timer reservation operation) is set by the kitchen remote controller 22 of the first hot water supply device 2, for example, as shown by an arrow B in FIG. By sending a bath automatic operation command signal to the water heater controller 23 via the communication line 24, the water heater controller 23 sets the bath automatic operation, and the system controller 1 receives the bath automatic operation command signal as shown in FIG. As shown by the arrow C, the automatic transfer operation is set in the hot water controller 33 of the second hot water supply device 3 in the same manner as in the hot water controller 33 of the second hot water supply device 3. , 33 can be linked to automatic operation control. On the other hand, since each water heater controller 23,33 starts automatic bathing based on the current time data supplied from the corresponding kitchen remote controllers 22,32, if there is a large shift between the current time data, In this embodiment, the time correction processing is performed by the time monitoring unit of the system controller 1 so as not to cause a deviation of 2 minutes or more. It can be avoided that the automatic bathing operation in the hot water supply devices 2 and 2 takes longer than planned. In addition, since each hot water supply device 2 and 3 can be configured as a system using mass-produced products, and the system controller 1 does not require an advanced control function (such as a radio clock), the overall cost of the system can be reduced. be able to.

  The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate. For example, three or more hot water supply devices may be provided, or a hot water supply device in which the function of the remote controller is integrated in the water heater may be used.

DESCRIPTION OF SYMBOLS 1 System controller 2 1st water heater 21 Water heater 22 Kitchen remote controller 23 Water heater controller 24 Communication line 3 2nd water heater 31 Water heater 32 Kitchen remote controller 33 Water heater controller 4 Large bathtub

Claims (14)

A plurality of hot water supply devices are provided, and each hot water supply device is provided with control means for performing timer reservation operation control based on current time data counted by a built-in clock, and the control means of the plurality of hot water supply apparatuses are electrically connected via a system controller. In the hot water system interconnected with
The system controller includes a time monitoring unit that monitors current time data counted by a built-in clock of each control means, and the time monitoring unit performs a predetermined time correction process based on a plurality of current time data ,
The time correction process is a process of correcting each internal clock according to the average time of the internal clocks of a plurality of control means when a difference of a predetermined value or more occurs in a plurality of current time data. system. 2. The hot water supply system according to claim 1, wherein each control means is configured to be able to turn on / off a timer reservation operation, and configured so that the system controller does not perform a predetermined time correction process when the timer reservation operation is off. Hot water supply system characterized by being . The hot water supply system according to claim 1 or 2 , wherein each control means is configured to be able to turn on / off timer reservation operation, and when the timer reservation operation is switched from off to on, the time monitoring unit of the system controller A hot water supply system that performs a predetermined time correction process . The hot water supply system according to claim 1 , 2 or 3 , wherein the control means is configured to perform a predetermined process at a predetermined time, and the time monitoring unit does not perform time correction across the predetermined time. A hot water supply system characterized by being configured as described above . A plurality of hot water supply devices are provided, and each hot water supply device is provided with control means for performing timer reservation operation control based on current time data counted by a built-in clock, and the control means of the plurality of hot water supply apparatuses are electrically connected via a system controller. In the hot water system interconnected with
The system controller includes a time monitoring unit that monitors current time data counted by a built-in clock of each control means, and the time monitoring unit performs a predetermined time correction process based on a plurality of current time data ,
Each control means is configured so that timer reservation operation can be turned on / off, and when the timer reservation operation is off, the system controller is configured not to perform a predetermined time correction process. . 6. The hot water supply system according to claim 5 , wherein each control means is configured to be able to turn on / off the timer reservation operation, and when the timer reservation operation is switched from off to on, the time monitoring unit of the system controller has a predetermined value. A hot water supply system that performs time correction processing . The hot water supply system according to claim 5 or 6 , wherein the control unit is configured to perform a predetermined process at a predetermined time, and the time monitoring unit does not perform time correction across the predetermined time. A hot water supply system characterized by being configured . A plurality of hot water supply devices are provided, and each hot water supply device is provided with control means for performing timer reservation operation control based on current time data counted by a built-in clock, and the control means of the plurality of hot water supply apparatuses are electrically connected via a system controller. In the hot water system interconnected with
The system controller includes a time monitoring unit that monitors current time data counted by a built-in clock of each control means, and the time monitoring unit performs a predetermined time correction process based on a plurality of current time data ,
Each control means is configured to be able to turn on / off the timer reservation operation, and the time monitoring unit of the system controller performs a predetermined time correction process when the timer reservation operation is switched from off to on. Hot water system. The hot water supply system according to claim 8 , wherein the control means is configured to perform a predetermined process at a predetermined time, and the time monitoring unit is configured not to perform time correction across the predetermined time. hot water supply system, characterized in that is. A plurality of hot water supply devices are provided, and each hot water supply device is provided with control means for performing timer reservation operation control based on current time data counted by a built-in clock, and the control means of the plurality of hot water supply apparatuses are electrically connected via a system controller. In the hot water system interconnected with
The system controller includes a time monitoring unit that monitors current time data counted by a built-in clock of each control means, and the time monitoring unit performs a predetermined time correction process based on a plurality of current time data ,
The hot water supply system is characterized in that the control means is configured to perform a predetermined process at a predetermined time, and the time monitoring unit is configured not to perform time correction across the predetermined time . The hot water supply system according to any one of claims 5 to 10 , wherein the time correction processing is performed by a timepiece counted by a built-in clock of any one of the control means when a difference of a predetermined value or more occurs in a plurality of current time data. A hot water supply system, which is a process of correcting another internal clock in accordance with time data. The hot water supply system according to any one of claims 5 to 10 , wherein the time monitoring unit includes a determination unit that determines the most accurate internal clock among the internal clocks of the plurality of control units, and the time correction processing includes a plurality of time correction processes. This is a process of correcting other internal clocks in accordance with the current time data counted by the internal clock determined to be most accurate by the determination means when a difference of a predetermined value or more occurs in the current time data of Hot water supply system. The hot water supply system according to any one of claims 1 to 12 , wherein each control means is configured to be able to perform time adjustment of a built-in clock by manual operation, and when time adjustment is performed manually by any control means. In addition, the system controller adjusts the time of the built-in clock of another control means in accordance with the time after the implementation. The hot water supply system according to any one of claims 1 to 13 , wherein each control means includes a water heater controller as a low-order control device that performs timer reservation operation control, and a remote controller as a high-order control device having the built-in clock. A communication line for connecting the water heater controller and the remote controller, and the remote controller is configured to send a timer reservation command signal to the water heater controller and current time data counted by a built-in clock to the communication line. The system controller is connected to the communication line, and the system controller sends a plurality of water heater controllers by sending the command signal sent to the communication line of each control means to the communication line of the other control means. The scheduled operation is linked to each other and is subject to processing in the time correction processing. A hot water supply system configured to send a correction time to the communication line of the control means.

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