JP4203478B2 - Hot water system - Google Patents

Description

  The present invention relates to a hot water supply system including a hot water heater, and a main remote controller and a slave remote controller that remote the hot water heater, and particularly relates to a process for changing the time displayed on each remote controller.

  2. Description of the Related Art Conventionally, a remote controller for remotely operating a water heater has a function of displaying a time for setting a reserved operation of the water heater. For example, when remote controllers are installed in a plurality of places such as a bathroom and a kitchen, each remote controller individually performs timing processing, and each remote controller is provided with a time change switch for changing the timing time. (For example, refer to Patent Document 1).

  As described above, when the timekeeping process is performed by a plurality of remote controllers, the process of synchronizing the timekeeping time by correcting the difference of the timekeeping time in each remote controller and the time change switch is operated by one of the remote controllers to change the timekeeping time. In response to this, it is necessary to perform processing for changing the time measured by another remote controller. This complicates the timing process in each remote controller.

Furthermore, in order to increase the timekeeping accuracy in each remote controller, it is necessary to provide each remote controller with a high-accuracy oscillator. However, the higher the accuracy, the more expensive the oscillator, and accordingly the cost of each remote controller increases accordingly. was there.
JP 2003-98279 A

  The present invention provides a hot water supply system that eliminates the above inconvenience, maintains high accuracy of the time displayed on each remote controller, and simplifies the time change process and the time synchronization process in each remote controller at a reduced cost. Objective.

  The present invention has been made to achieve the above object, and includes a water heater, a main remote controller for remotely operating the water heater, and at least one slave remote controller. The master remote controller and the slave remote controller are mutually connected. The present invention relates to an improvement of a hot water supply system having means for communicating.

  The main remote controller includes: a first display; a first oscillator; a first timing unit that counts the output pulses of the first oscillator; and a timing by the first timing unit. Time keeping display means for displaying time on the first display; time data sending means for sending first time data indicating the time measured by the first time keeping means to the slave remote controller at a predetermined timing; When the second time data transmitted from the slave remote controller is received, the time indicated by the second time data is compared with the time indicated by the first time data transmitted most recently. When the two times are different from each other, there is provided time measuring time changing means for changing the time measuring time of the first time measuring means to the time indicated by the second time data, and the slave remote controller includes a second indicator and , The first oscillator A second oscillator with low accuracy, second timing means for counting time by counting output pulses of the second oscillator, a time change switch for instructing time change, and the first time data Is received, the time indicated by the first time data is displayed on the second display, and the first time data is transmitted to the main remote controller as the second time data. When the time change operation is performed by the reception time display means for executing the display process and the time change switch, the reception time display process is prohibited, and the second time measurement is performed from the time set by the time change operation. After the time measurement is started and the time change operation is performed, a standby period set to a time longer than the time required for changing the time measurement of the first time measurement means in the main remote controller is set. Until the first time data is received, data indicating the time measured by the second time measuring means is transmitted to the main remote controller as the second time data, and the second time measuring means. And a time change control means for displaying the time measured by the second display unit and canceling the prohibition of the reception time display process when the standby time has elapsed.

  According to the present invention, since the second oscillation circuit provided in the slave remote controller is less accurate than the first oscillation circuit provided in the main remote controller, the cost is lower than that of the first oscillation circuit. Become cheap. Therefore, the cost of the entire hot water supply system can be reduced as compared with the case where both the main remote controller and the slave remote controller are provided with the first oscillation circuit.

  In the slave remote controller, when the time change operation by the time change switch is not performed, the time indicated by the first time data transmitted from the main remote controller is displayed on the second display by the reception time display means. The time can be displayed with the same accuracy in synchronization with the main remote controller.

  If the time change operation by the time change switch is not performed, the first time data transmitted from the main remote controller is transmitted as it is as the second time data from the slave remote controller to the main remote controller, and the time by the time change switch When the changing operation is performed, data indicating the changed time is transmitted as second time data from the slave remote controller to the main remote controller.

  Therefore, in the main remote controller, the time change operation in the slave remote controller is performed by a simple process of confirming the difference between the first time data transmitted most recently and the second time data transmitted from the slave remote controller accordingly. By determining the presence or absence, it is possible to change the time measured by the first time measuring means.

  On the other hand, on the slave remote controller side, the second time measuring means sets the time set by the time change operation until the standby time elapses after the time change operation is performed by the time change switch by the time change control means. The time measured by the second time measuring means is displayed on the second display. Then, after the standby time has elapsed, a simple process of displaying the time indicated by the first time measurement data transmitted from the main remote controller on the second display unit, the high accuracy synchronized with the main remote controller again. Time display can be performed.

  The time measured by the second time measuring means is displayed on the second display until the predetermined time elapses after the time change operation is performed by the time change switch on the slave remote controller. Therefore, the time display can be continued on the slave remote controller even while the time change processing is being executed on the main remote controller. Since the time measured by the second time measuring means is displayed only in a minute time until the waiting time elapses, the time measurement accuracy does not matter.

  The output pulse of the second oscillator is also used as a drive clock for a microcomputer provided in the slave remote controller.

  According to the present invention, when the slave remote controller includes a microcomputer and the output of the second oscillator is used as a drive clock for the microcomputer, the time keeping process by the second time measuring means is performed. Since it is not necessary to provide a dedicated oscillator, the cost of the slave remote controller can be further reduced.

  Embodiments of the present invention will be described with reference to FIGS. 1 is an overall configuration diagram of the hot water supply system of the present invention, FIG. 2 is an external view of the bathroom remote control shown in FIG. 1, FIG. 3 is an external view of the kitchen remote control shown in FIG. FIG. 5 is an operation flowchart of the bathroom remote control, FIG. 6 is an operation flowchart of the kitchen remote control, and FIG. 7 is a timing chart showing transition of display times of the bathroom remote control and the kitchen remote control.

  With reference to FIG. 1, in addition to the function of supplying hot water to a hot water supply pipe (not shown), the water heater 1 has an automatic hot water filling function for supplying a predetermined amount of hot water to a bathtub (not shown), and hot water in the bathtub. It has a tracking function for tracking. In order to remotely operate the water heater 1, a bathroom remote controller 2 (corresponding to the main remote controller of the present invention) provided in the bathroom and a kitchen remote controller 3 (corresponding to the slave remote controller of the present invention) provided in the kitchen. And an additional remote controller 4 (corresponding to the slave remote controller of the present invention) provided in a washroom or the like.

  Referring to FIG. 2 (a), the bathroom remote controller 2 is provided with a display 10 (corresponding to the first display of the present invention) for displaying the operating state of the water heater 1, and the water heater 1 is operated for hot water supply. An operation switch 11 for switching between a possible operation state and a standby state in which hot water supply operation is impossible, a follow-up switch 12 for instructing execution of the “follow-up operation”, a buzzer provided in the kitchen remote control 3 and the additional remote control 4 The call switch 13 for instructing the ringing of the water, the automatic switch 14 for instructing the execution of the “automatic hot water filling operation”, the hot water temperature switch 15 for instructing the change of the hot water temperature, and the hot water in the “automatic hot water filling operation” Bath temperature switch 16 for instructing the change of the reheating temperature in the tensioning temperature or the “reheating operation”, the hot water amount switch 17 for setting the hot water amount in the “automatic filling operation”, and hot water in the bathtub Addition hot water switch 18 for instructing execution of “additional hot water operation” for supplying a certain amount of water, lukewarm water switch 21 for instructing execution of “warm water operation” for supplying a predetermined amount of water to the bathtub, and output level of speaker 24 A volume switch 19 for setting the temperature, a heat retention time switch 20 for setting an execution time of the “heat insulation operation” for keeping the hot water in the bathtub at the water filling temperature from the end of the “automatic water filling operation”, the current time and Clock switch 22 for instructing switching to “time change mode” in which the reservation time can be set / changed, time change switch 23 for instructing time change, hot water supply temperature of kitchen remote controller 3 and additional remote controller 4 Priority switch 25 for instructing setting of “priority mode” in which setting is invalidated and priority is given to setting of hot water supply temperature by bathroom remote controller 2, and automatic hot water filling at the reservation time The bath reservation switch 26 for instructing the set / release of "reservation operation" to end the rolling is provided.

  Referring to FIG. 2 (b), the display 10 is turned on when the priority display unit 30 is turned on when the “priority mode” is set, and when the hot water supply temperature is set to 60 ° C. or higher. A high temperature display unit 31 that performs heating, a hot water supply combustion display unit 32 that is turned on during combustion of a hot water supply burner (not shown), a hot water supply temperature display unit 33 that displays a hot water supply temperature, and a reservation that is turned on when “reserved operation” is set Display unit 34, time display unit 35 for displaying the current time and reserved time, reheating combustion display unit 36 that is lit during combustion of a reheating burner (not shown), and a bath for switching and displaying the hot water amount / hot water temperature Display unit 42, unit display unit 37 indicating the display content of bath display unit 42, water injection display unit 38 that is lit during the execution of “steaming water operation”, and water pouring display unit 39 that is lit during the execution of “addition hot water operation” , Automatic hot water operation / Remembrance operation / There are provided a bath operation display unit 40 that lights during execution of the hot water operation / cold water operation, a water level display unit 41 that indicates the amount of hot water filling, and a heat insulation display unit 43 that lights during execution of the “heat insulation operation”. .

  In the bathroom remote controller 2, the user first operates the clock switch 22 to enter the “time setting mode”. When the user operates the time change switch 23 (return, proceed), the time displayed on the time display unit 35 is changed accordingly. When the user operates the clock switch 22, the time displayed on the time display unit 35 is set as a new time starting time.

  Referring to FIG. 3 (a), the kitchen remote controller 3 includes a display 50 for displaying the operating state of the water heater 1, an operating state in which the water heater 1 can perform a hot water supply operation, and a standby state in which the hot water supply operation cannot be performed. Operation switch 51 for switching to, automatic switch 52 for instructing execution of “automatic filling operation”, clock switch 55 for instructing switching to “time change mode” in which the current time can be set / changed A time change switch 53 for instructing to change the current time, a volume switch 54 for setting the output level of the speaker 56, and a hot water supply temperature switch 57 for changing the hot water supply temperature are provided.

  Referring to FIG. 3B, the display 50 of the kitchen remote controller 3 includes a priority display unit 60 that lights up when the “priority mode” is set, and a hot water supply temperature display unit 61 that displays the hot water supply temperature. , A high temperature display unit 62 that lights up when the hot water supply temperature is set to 60 ° C. or higher, a hot water combustion display unit 63 that lights up during the hot water supply operation, a heat retention display unit 64 that lights up during the execution of the “heat insulation operation”, and the current time Is displayed, and a reservation display section 66 that is turned on when “reserved operation” is set. The configuration of the additional remote controller 4 is the same as that of the kitchen remote controller 3.

  In the kitchen remote control 3, the user first operates the clock switch 55 to enter the “time setting mode”. Then, when the user operates the time change switch 53 (return, proceed), the time displayed on the time display unit 65 is changed accordingly. When the user operates the clock switch 55, the time displayed on the time display unit 65 is set as a new start time.

  Next, the circuit configuration of the bathroom remote controller 2 and the kitchen remote controller 3 will be described with reference to FIG. The bathroom remote controller 2 includes a power supply circuit 70 that generates a circuit drive voltage using power supplied from the water heater 1, and a power source that backs up the circuit drive voltage when power supply from the water heater 1 is interrupted due to a power failure or the like. A holding circuit 71, a communication circuit 72 that is an interface circuit for performing communication between the water heater 1, the kitchen remote controller 3, and the additional remote controller 4, and a microcomputer 73 that controls the operation of the bathroom remote controller 2 (hereinafter referred to as a microcomputer 73). A microcomputer drive oscillation circuit 74 for generating a drive pulse signal for the microcomputer 73, a clock oscillation circuit 75 for generating a pulse signal for time (corresponding to the first oscillator of the present invention), and an operation signal for each switch. A switch input circuit 76 which is an interface circuit for inputting, and an LED (illustrated) in the display 10 and the switch The display output circuit 77 is provided an interface circuit for outputting a driving signal to no).

  The microcomputer 73 counts the pulse signal output from the timekeeping oscillation circuit 75 and counts the time by counting the time signal 80 (corresponding to the first timekeeping means of the present invention). Time data display means 81 for displaying the time on the display 10 via the display output circuit 77, and time data transmission means 82 for transmitting the first time data indicating the time measured by the time measurement means 80 to the kitchen remote control 3 and the additional remote control 4. , And a time measuring time changing means 83 for changing the time measuring time of the time measuring means 80 in accordance with the time changing operation in the kitchen remote control 3 or the extension remote control 4.

  Further, the kitchen remote controller 3 includes a power supply circuit 90 that generates a circuit driving voltage by the electric power supplied from the water heater 1, and an interface circuit for performing communication among the water heater 1, the bathroom remote controller 2, and the additional remote controller 4. A communication circuit 91, a microcomputer 92 for controlling the operation of the kitchen remote controller 3 (hereinafter referred to as a microcomputer 92), a microcomputer drive oscillation circuit 93 for generating a drive pulse signal for the microcomputer 92, and an operation signal for each switch. And a display output circuit 95 which is an interface circuit for outputting a drive signal to the display 50 and the LED built in the switch.

  Then, the microcomputer 92 counts the pulse signal output from the microcomputer driving oscillation circuit 93 and counts the time, and transmits the time from the bathroom remote controller 2 (corresponding to the second timing means of the present invention). Receiving time display means 101 for executing “reception time display processing” for receiving the first time data to be displayed and displaying the time indicated by the first time data on the display device 50 via the display output circuit 95, When the time change operation is performed by the clock switch 55 and the time change switch 53, the “reception time display process” is prohibited until the predetermined standby time elapses, and the time measured by the time measuring means 100 is displayed via the display output circuit 95. A time change control means 102 for displaying on the display 50 is provided. The circuit configuration of the additional remote controller 4 is the same as that of the kitchen remote controller 3.

  Next, processing in the microcomputer 73 of the bathroom remote controller 2 and the microcomputer 92 of the kitchen remote controller 3 when the time change operation is performed by the kitchen remote controller 3 will be described with reference to FIGS. 5 and 6. Note that the same processing is executed in the bathroom remote controller 2 and the additional remote controller 4 when the time change operation is performed by the additional remote controller 4.

First, according to the flowchart shown in FIG. 5, the process of time display and time change by the microcomputer 73 provided in the bathroom remote controller 2 will be described. When starting the operation, the microcomputer 73 resets a T ₁ flag (0 → T ₁ ) indicating that a T ₁ timer described later is operating in STEP ₁ .

  At the next STEP2, the timekeeping time display means 81 displays the timekeeping time of the timekeeping means 80 on the display 10, and at STEP3, the time data transmission means 82 sends the first time data indicating the timekeeping time of the timekeeping means 80 to the kitchen remote controller. 3 and the additional remote controller 4. Note that the timekeeping time display in STEP 2 is performed in units of hours and minutes, and the transmission of the first time data in STEP 3 is also performed in units of hours and minutes.

  The subsequent STEP 4 to STEP 6, STEP 10 to STEP 13, and STEP 20 to STEP 21 are processes by the time measuring time changing unit 83. The time measuring time changing means 83 proceeds to STEP 5 when receiving the second time data transmitted from the kitchen remote control 3 in STEP 4.

  Then, the time measuring time changing means 83 is indicated in STEP 5 by the time indicated by the first time data (first time data transmitted most recently) transmitted in STEP 3 and the second time data received in STEP 4. It is determined whether the times match.

Here, when the two times coincide with each other, the processing on the kitchen remote controller 3 side will be described later, but the first time data transmitted in STEP 3 is transmitted as it is from the kitchen remote controller 3 as the second time data. It can be determined that the time change operation is not performed with the kitchen remote controller 3. Therefore, the process proceeds to STEP6 in this case, measured time changing means 83 resets the T ₁ flag returns to STEP2.

  As described above, if the time change operation is not performed by the kitchen remote controller 3, STEP2 to STEP6 are repeatedly executed. In STEP2, the timekeeping time of the timekeeping means 80 is displayed on the display 10 by the timekeeping time display means 81, and in STEP3. The time data transmission means 82 transmits first time measurement data indicating the time measured by the time measurement means 80 to the kitchen remote controller 3. In this case, every time the processing of STEP4 to STEP6 and STEP2 is completed, the first time data indicating the time measured by the time measuring means 80 is transmitted to the kitchen remote control 3 by the time data transmitting means 82 in STEP3. The time point when the processing of STEP2 is completed is the predetermined timing of the present invention.

On the other hand, if the time indicated by the first time data is different from the time indicated by the second time data in STEP 5, the process branches to STEP 10. Then, the time measuring time changing unit 83 determines whether or not the T ₁ flag indicating that the T ₁ timer whose set time is T ₁ is operating in STEP 10 is set (T ₁ flag = 1). If the T ₁ flag is not set, the process branches to STEP 20, and the time measuring time changing means 83 starts the T ₁ timer at STEP 20, sets the T ₁ flag at STEP 21, and returns to STEP 2. Here, the T ₁ timer is for preventing erroneous recognition of the second timing data due to noise or the like, and for example, about 80 seconds is set as T ₁ .

If the T ₁ timer has been set in STEP 10, that is, if the T ₁ timer has already been started, the process proceeds to STEP 11. The measured time changing means 83, T ₁ timer is determined whether the time is up at STEP 11, the process branches to STEP2 when the T ₁ timer has not timed out.

On the other hand, when the T ₁ timer has timed in STEP11, the process proceeds to STEP 12, measured time changing means 83, at time + T ₁ indicated by the second time data changes the measured time measured by the time measuring unit 80, T ₁ flag STEP13 Is reset and proceeds to STEP2.

As described above, the time measuring time changing unit 83 branches to STEP 10 when the time indicated by the first time data in STEP 5 and the time indicated by the second time data are different. in addition branch to start the T ₁ timer in STEP20. When the time and the second time T ₁ timer time continues a state in which different in STEP11 shown by the data indicated by the first time data has timed, the measured time measured by the time measuring unit 80 in STEP12 change.

In this case, when the state in which the time indicated by the first time data and the time indicated by the second time data are different from each other is shorter than T ₁ , the process proceeds from STEP 5 to STEP 6 and proceeds to T ₁ flag is reset. Therefore, when the time indicated by the first time data instantaneously differs from the time indicated by the second time data due to the influence of noise or the like, the time measurement time of the time measuring means 80 is erroneously changed. Can be prevented.

Next, time display and time change processing by the microcomputer 92 provided in the kitchen remote control 3 will be described according to the flowchart shown in FIG. When starting the operation, the microcomputer 92 resets the T ₂ flag (0 → T ₂ ) indicating that the T ₂ timer having T ₂ as the set time is operating in STEP 30.

In subsequent STEP 31, when the first time data transmitted from the bathroom remote controller 2 is received, the process proceeds to STEP 32, and the microcomputer 92 determines whether or not the T ₂ flag is set (T ₂ flag = 1). . Then, the process proceeds to STEP33 if no T ₂ flag is set, the microcomputer 92 determines whether the time change operation, the time change operation proceeds to STEP34 if not done.

  STEP 34 to STEP 35 are processes by the reception time display means 101. The reception time display means 101 displays the time indicated by the first time data in STEP 34 on the display 50, and transmits the first time data as it is as the second time data to the bathroom remote controller 2 in STEP 35, STEP 31 Return to.

  As described above, if the time change operation is not performed, the processing of STEP 34 and STEP 35 by the reception time display unit 101 is repeatedly executed without branching at STEP 31 to STEP 33. In this case, the display 50 of the kitchen remote controller 3 has a high accuracy based on the pulse signal of the clock oscillation circuit 75 clocked by the clock means 80 of the bathroom remote controller 2. Therefore, it is not necessary for the kitchen remote control 3 to include a highly accurate oscillation circuit for timekeeping.

  Moreover, as shown in FIG. 4, since the bathroom remote control 2 is equipped with the power holding circuit 71, even if the power supply from the water heater 1 is interrupted due to a power failure, the time counting by the time measuring means 80 can be continued. . When the power failure is recovered, the kitchen remote controller 3 can restart the time display based on the first timing data transmitted from the bathroom remote controller 2, so that the kitchen remote controller 3 does not need to have a power holding circuit.

On the other hand, when the T ₂ flag is set in STEP 32, that is, when the T ₂ timer is in operation, the process branches to STEP 40, and the microcomputer 92 determines whether or not the T ₂ timer has timed out in STEP 40. . If the T ₂ timer has expired, the process branches to STEP 50, the T ₂ flag is reset, and the process proceeds to STEP 34. In addition, when the T ₂ timer has not timed up in STEP40, the process proceeds to STEP62.

If a time change operation is performed in STEP 33, the process branches to STEP 60. STEP 60 to STEP 63 are processes by the time change control means 102. The time change control means 102 starts the T ₂ timer at STEP 60 and sets the T ₂ flag at STEP 61.

Then, the time change control unit 102 displays the time obtained by adding the elapsed time T ₂ timer time set by the time changing process in the subsequent STEP62 on the display 50. Here, the time measured by the T ₂ timer is measured by counting the pulse signal output from the microcomputer driving oscillation circuit 93 by the time measuring means 100. Further, in STEP 63, the time change control unit 102, data indicating a time obtained by adding the elapsed time T ₂ timer set time by time changing process, and transmits a second clock data into the bathroom remote controller 2.

Thus, when the time change operation is made in STEP 33, the process of STEP34 and STEP35 according to the reception time display means 101 is inhibited until T ₂ timer times at STEP 40, STEP 62 and STEP63 according to the time-change control means 102 Processing is executed.

Then, at STEP 63, the time change control unit 102, the data indicating the time obtained by adding the elapsed time T ₂ timer set time by time change operation is sent to the bathroom remote controller 2 as the second time data, The second time data received at STEP 4 in FIG. 5 is different from the first time data transmitted at STEP 3. Therefore, when STEP 5 is branched from STEP 5 and the state where the first time data and the second time data are different continues for T ₁ or more, the clock time of the clock means 80 is changed by the clock time changing means 83 in STEP 12. Is done.

Here, the set time T ₂ of the T ₂ timer is set to a time longer than the time T ₁ required for the time change process of the bathroom remote controller 2 described above. After the time change operation is performed in STEP 33 and the T ₂ timer is started in STEP 60 and until the T ₂ timer expires in STEP 40, the time change control means 102 sets the set time by the time change operation in STEP 62. The elapsed time of the + T ₂ timer is displayed on the display 50. Therefore, the time display on the display device 50 is not interrupted between the end of the time change operation and the end of the change of the time measurement time in the bathroom remote controller 2.

Since the time display based on the elapsed time of the T ₂ timer is limited to the time up of the T ₂ timer in this way, the output pulse of the oscillation circuit 93 for driving the microcomputer, which is less accurate than the time clock oscillation circuit, is displayed. the time measuring means 100 for counting, there is no problem in performing the measurement of the T ₂ timer.

  Next, FIG. 7 shows the display time on the display 10 of the bathroom remote controller 2 when the process of the bathroom remote controller 2 of FIG. 5 and the process of the kitchen remote controller 3 of FIG. 4 is a timing chart showing a transition of time indicated by a response signal (second time data) transmitted to the remote controller 2, and the horizontal axis is set to time (t).

In FIG. 7, the time display of the bathroom remote controller 2 is switched at the time t ₀ , t ₁ , t ₃ , t ₅ , t ₇ , t ₈ , t ₉ . Then, the time indicated by the second time data transmitted from the kitchen remote control 3 is switched in synchronization with the display time of the bathroom remote control 2 at times t ₀ , t ₁ , t ₃ , t ₈ , t _9. Yes. The time change operation of the kitchen remote controller 3 is started at time t _2, the period from t ₄ when the time change operation has been completed up to t ₇ where T ₂ has elapsed (until T ₂ timer times), the time The “reception time display process” is prohibited by the change control means 102, and the display time of the kitchen remote controller 3 becomes the time of the time measuring means 80 provided in the kitchen remote controller 3.

On the other hand, in the bathroom remote controller 2, the second time data (11:00) is sent from the kitchen remote controller 3 by the time change operation at t _4, the first time data transmitted to the nearest (10:02) phase It will be in a different state. Then, at time t ₅ when the state in which the first time data and the second time data are different from each other continues for T ₁ , the time measured by the time measuring means 80 is changed to the second time data (11: 00) + T ₁ .

In the kitchen remote controller 3, since t ₇ where T ₂ has elapsed, the prohibition of "reception time display process" is released, "reception time display process" is resumed, first sent from the bathroom remote controller 2 When the time data is received, the time indicated by the first time data is displayed. Therefore, the display time of the bathroom remote controller 2 and the display time of the kitchen remote controller 3 are synchronized again.

  In the present embodiment, the hot water supply system including the kitchen remote controller 3 and the additional remote controller 4 is shown as the slave remote controller of the present invention. However, the hot water supply system including one slave remote controller and three or more slave remote controllers are provided. The present invention can also be applied to a hot water supply system.

  In the present embodiment, as shown in FIG. 4, the time measuring means 100 provided in the kitchen remote control 3 counts the pulse signal of the microcomputer driving oscillation circuit 93 to measure the time. Separately from the oscillation circuit 33, the oscillation circuit with a lower accuracy than the timing oscillation circuit 75 provided in the bathroom remote controller 2 is provided, and the timing means 100 also measures the pulse signal output from the oscillation circuit. The effects of the present invention can be obtained.

The whole hot-water supply system figure of this invention. The external view of the bathroom remote control shown in FIG. The external view of the kitchen remote control shown in FIG. The circuit block diagram of a bathroom remote control and a kitchen remote control. The operation | movement flowchart of a bathroom remote control. Operation flowchart of kitchen remote control. The timing chart which showed transition of the display time of a bathroom remote control and a kitchen remote control.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Water heater, 2 ... Bathroom remote control, 3 ... Kitchen remote control, 4 ... Extension remote control, 10 ... Display of (bathroom remote control), 50 ... Display of (kitchen remote control), 53 ... Time change switch (of kitchen remote control) 73 ... Microcomputer (for bathroom remote control) 74 ... Oscillation circuit for driving microcomputer (75 for bathroom remote control) 75 ... Oscillation circuit for timekeeping, 80 ... Timekeeping means (for bathroom remote control) 81 ... Timekeeping time display means 82 ... Time data transmission means 83 ... Time keeping time changing means 92 ... Microcomputer (of kitchen remote control) 93 ... Oscillation circuit for driving a microcomputer (kitchen remote control) 100 ... Time measuring means (of kitchen remote control) 101 ... Reception time Display means, 102 ... time change control means

Claims (2)

In a hot water supply system comprising a water heater, a main remote controller for remotely operating the water heater and at least one slave remote controller, the master remote controller and the slave remote controller having means for communicating with each other,
The main remote controller includes a first display, a first oscillator, a first timing unit that counts the output pulses of the first oscillator, and counts the time measured by the first timing unit. Time keeping display means for displaying on the first indicator;
Time data transmitting means for transmitting first time data indicating the time measured by the first time measuring means to the slave remote controller at a predetermined timing;
When the second time data transmitted from the slave remote controller is received, the time indicated by the second time data is compared with the time indicated by the first time data transmitted most recently. When the times are different, the time keeping time changing means for changing the time keeping time of the first time keeping means to the time indicated by the second time data,
The slave remote controller includes: a second display; a second oscillator having a lower accuracy than the first oscillator; and second timing means for counting time by counting output pulses of the second oscillator; A time change switch for instructing time change;
When the first time data is received, the time indicated by the first time data is displayed on the second display, and the first time data is used as the second time data as the main time data. A reception time display means for executing a reception time display process to be transmitted to the remote control;
When the time change operation is performed by the time change switch, the reception time display process is prohibited, and the time measurement by the second time measuring unit is started from the time set by the time change operation. When the first time data is received until a standby period set to a time longer than the time required for changing the time measured by the first time measuring means in the main remote controller has elapsed. , Transmitting data indicating the time measured by the second time measuring means to the main remote controller as the second time data, and displaying the time measured by the second time measuring means on the second display, A hot water supply system comprising: a time change control means for canceling the prohibition of the reception time display process when a standby time has elapsed.   2. The hot water supply system according to claim 1, wherein the output pulse of the second oscillator is also used as a drive clock of a microcomputer provided in the slave remote controller.

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