JP2017172936A - Hot water supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water supply system capable of surely notifying a user of information on a hot water supply amount, without deteriorating convenience in displaying of information on setting of an operation state of a water heater or setting of the water heater.SOLUTION: During execution of hot water supply from a water heater, or during non-execution of hot water supply from the water heater except for after stop of hot water supply, at least one information of first information on setting of the water heater and second information on a state of the water heater is displayed on display means (top screen 31). After hot water supply from the water heater is stopped, third information on a hot water supply amount from start to stop of the hot water supply is temporarily displayed on the display means, instead of the one information of the first and second information (first guidance screen 32).SELECTED DRAWING: Figure 4

Description

  The present invention relates to a hot water supply system.

  The following Patent Document 1 discloses a water heater as follows. When the integrated hot water supply amount reaches a predetermined integrated hot water supply amount within a set time from the start of the hot water supply operation, the hot water usage amount from the start of the hot water supply operation is displayed in a pop-up on the display unit of the operation terminal. When a set time has elapsed from the start of the hot water supply operation, a different type of notification from the pop-up display is performed.

JP 2013-245846 A

  A plurality of terminal devices are often connected to the water heater. The plurality of terminal devices are, for example, a bathroom remote controller and a kitchen remote controller. The display unit of the terminal device normally displays information related to the operation state of the water heater or the setting of the water heater, for example, information such as the lift setting and the hot water state. In the technique of Patent Document 1, the amount of hot water supply used is displayed in a pop-up while the hot water supply operation is being executed. For this reason, when using hot water for a long time such as showering or washing dishes, when the amount of hot water used is displayed as a pop-up, other users watching other remote controllers among the plurality of remote controllers may There is a problem that information regarding the setting of the water heater cannot be seen, and convenience is poor.

  The present invention has been made to solve the above-described problems, and does not reduce the convenience of seeing the display of information related to the operating state of the water heater or the setting of the water heater, so that information relating to the amount of hot water can be obtained. An object of the present invention is to provide a hot water supply system capable of reliably informing a user.

  A hot water supply system according to the present invention includes a water heater, means for detecting whether hot water is being supplied from the water heater, means for calculating the amount of hot water supplied from the water heater, display means, and display of the display means. Control means for controlling the hot water supply when the hot water supply from the water heater is being executed and when hot water is not being supplied from the hot water heater except after the hot water supply is stopped. At least one of the second information related to the state of the machine is displayed on the display means, and after the hot water supply from the water heater is stopped, the third information about the amount of hot water supply from the start to the stop of the hot water supply is the first information and the first information Instead of at least one of the two pieces of information, the information is temporarily displayed on the display means.

  According to the hot water supply system of the present invention, it is possible to reliably notify the user of information relating to the amount of hot water supply without deteriorating the convenience of viewing the display of information relating to the operating state of the water heater or the setting of the water heater. .

It is a figure which shows the hot water supply system of Embodiment 1. FIG. It is an external view of the kitchen remote control with which the hot-water supply system of Embodiment 1 is provided. 3 is a flowchart illustrating a control operation of the hot water supply system according to the first embodiment. It is a figure which shows the guidance display of the hot water supply system of Embodiment 1. FIG.

  Hereinafter, embodiments will be described with reference to the drawings. Elements common to the drawings are denoted by the same reference numerals, and redundant description is simplified or omitted. The present disclosure may include any combination of configurations that can be combined among the configurations described in the following embodiments.

Embodiment 1 FIG.
FIG. 1 shows a hot water supply system 1 according to the first embodiment. As shown in FIG. 1, the hot water supply system 1 according to the first embodiment includes a hot water storage type hot water heater 2, a kitchen remote control 25, and a bathroom remote control 26. The kitchen remote control 25 is installed in the kitchen. The bathroom remote control 26 is an example of a terminal device installed in a bathroom. The kitchen remote control 25 is an example of a terminal device installed in a place other than the bathroom. The hot water supply system 1 may include another terminal device installed in a place other than the bathroom and the kitchen instead of or in addition to the kitchen remote control 25.

  The hot water storage type water heater 2 includes a hot water storage unit 3 and a heat pump unit 28. The heat pump unit 28 is an example of a heating unit that heats water. The heat pump unit 28 is provided with a refrigeration cycle device (not shown) in which a compressor, a water refrigerant heat exchanger, for example, a decompression device such as an expansion valve, and an air heat exchanger as an evaporator are sequentially connected by refrigerant piping. ing.

  A hot water storage tank 4 is provided in the hot water storage unit 3. The hot water storage tank 4 is connected to the heat pump unit 28 via the heat storage circuit 24. The heat storage circuit 24 connects a passage connecting the lower part of the hot water storage tank 4 and the water inlet of the water refrigerant heat exchanger of the heat pump unit 28, the water outlet of the water refrigerant heat exchanger, and the upper part of the hot water storage tank 4. And a passage. A circulation pump 27 is disposed in the middle of the heat storage circuit 24.

  Inside the hot water storage tank 4, a temperature stratification can be formed in which the upper side is high temperature and the lower side is low temperature due to the difference in water density due to the temperature difference. The hot water storage tank 4 is provided with a plurality of temperature sensors for detecting the temperature distribution in the vertical direction inside the hot water storage tank 4. In the present embodiment, the following temperature sensors are arranged. The first temperature sensor 5 a is located at a position where the volume from the top of the hot water storage tank 4 is 0 L, that is, at the top of the hot water storage tank 4. The second temperature sensor 5b is located at a position where the volume from the top of the hot water storage tank 4 is 50L. The third temperature sensor 5c is located at a position where the volume from the top of the hot water storage tank 4 is 100L. The fourth temperature sensor 5d is at a position where the volume from the top of the hot water storage tank 4 is 150L. In the present embodiment, the amount of hot water and the amount of heat in the hot water storage tank 4 can be detected based on the temperatures detected by the temperature sensors 5a to 5d.

  The hot water storage type water heater 2 can perform a heat storage operation. The heat storage operation is an operation for accumulating high-temperature hot water in the hot water storage tank 4. The heat storage operation is an operation for increasing the heat storage amount of the hot water storage tank 4. In the heat storage operation, it is as follows. The circulation pump 27 and the heat pump unit 28 are operated. The water taken out from the lower part of the hot water storage tank 4 is guided to the water / refrigerant heat exchanger in the heat pump unit 28. The temperature sensor 5e detects the temperature of water entering the heat pump unit 28. Hot water that has been heated by the water-refrigerant heat exchanger returns to the hot water storage tank 4 and flows into the upper portion of the hot water storage tank 4. A temperature sensor 6 is disposed at a connection position of the heat storage circuit 24 with respect to the upper part of the hot water storage tank 4. According to the temperature sensor 6, the temperature of hot water returning from the heat pump unit 28 to the upper part of the hot water storage tank 4 can be detected.

  The general hot water supply side electric mixing valve 7 is supplied through hot water supplied through a hot water supply pipe 8 connected to the upper part of the hot water storage tank 4, that is, hot water, and through a water supply pipe 9 connected to a water source such as a water pipe. By mixing with low-temperature water, hot water having a set temperature is generated. The hot water is supplied to a faucet (not shown) via the mixed hot water supply pipe 10. In this specification, the “faucet” may include, for example, a shower and a hot water tap in a bathroom, a hot water tap of a sink, a hot water tap of a wash basin, and the like.

  The water supply pipe 9 is provided with a water supply temperature sensor 23 to detect the temperature of the water flowing through the water supply pipe 9. The mixed hot water supply pipe 10 is provided with a hot water flow rate sensor 19 and a hot water temperature sensor 20. The hot water supply flow rate sensor 19 detects the hot water supply flow rate to the faucet. The hot water supply temperature sensor 20 detects the hot water supply temperature to the faucet.

  The hot water supply side electric mixing valve 11 generates hot water having a set temperature by mixing hot water supplied through the hot water supply pipe 8, that is, high temperature water, and low temperature water supplied through the water supply pipe 9. The hot water is supplied to a bathtub (not shown) in the bathroom via the mixed bath pipe 18 and the bath-side circulation circuit 12. The hot water storage type water heater 2 can perform hot water operation for hot water to the bathtub. In the hot water operation, the start and stop of hot water supply are controlled by an electromagnetic valve 13 provided in the mixed bath pipe 18. The mixed bath pipe 18 is provided with a bath flow sensor 21 and a bath temperature sensor 22. The bath flow sensor 21 detects the hot water flow rate to the bathtub. The bath temperature sensor 22 detects the hot water supply temperature to the bathtub. The general hot water supply side electric mixing valve 7 and the bath hot water supply side electric mixing valve 11 are examples of mixing means for adjusting the hot water supply temperature by mixing high temperature water and low temperature water.

  The bath-side circulation circuit 12 is a path that draws bath water from the bathtub by the bath circulation pump 14 and returns to the bathtub via the heat exchanger 15. The tank-side circulation circuit 16 is a path that draws hot water in the hot water storage tank 4 from the upper part of the hot water storage tank 4 by the circulation pump 17 and is connected to the lower part of the hot water storage tank 4 via the heat exchanger 15. The hot water storage type water heater 2 can perform a reheating operation for heating the bathtub water stored in the bathtub. At the time of chasing, it will be as follows. The bath circulation pump 14 and the circulation pump 17 are operated. Bath water drawn into the bath-side circulation circuit 12 from the bathtub by the bath circulation pump 14 and high-temperature hot water drawn into the tank-side circulation circuit 16 from the upper part of the hot water storage tank 4 by the circulation pump 17 in the heat exchanger 15. Exchange heat. The bathtub water heated by the heat exchanger 15 returns to the bathtub. When it is detected that the bath temperature has risen to the set temperature, the chasing operation may be automatically ended by stopping the operation of the bath circulation pump 14 and the circulation pump 17.

  The hot water storage type water heater 2 includes a control device 50. Heat pump unit 28, circulation pump 27, temperature sensors 5a to 5e, temperature sensor 6, general hot water supply side electric mixing valve 7, bath hot water supply side electric mixing valve 11, solenoid valve 13, bath circulation pump 14, circulation pump 17, and flow rate for hot water supply The sensor 19, the hot water supply temperature sensor 20, the bath flow sensor 21, the bath temperature sensor 22, and the water supply temperature sensor 23 are each electrically connected to the control device 50. The kitchen remote controller 25 and the bathroom remote controller 26 are connected to the control device 50 so as to be capable of data communication in both directions. Communication between the kitchen remote controller 25 and bathroom remote controller 26 and the control device 50 may be wired communication or wireless communication. The control device 50 controls the operation of the hot water supply system 1. The kitchen remote control 25 and the bathroom remote control 26 communicate with the control device 50 to exchange data on information related to operation commands and operating conditions.

  The control device 50 in the present embodiment includes a heat storage operation control unit 50a, a display control unit 50b, a timer unit 50c, a hot water detection unit 50d, a hot water supply amount calculation unit 50e, and a mode setting unit 50f.

  The heat storage operation control unit 50a controls the heat storage operation. The heat storage operation may include a main heat storage operation and an additional heat storage operation. The main heat storage operation may be performed in a time zone when the unit price of electricity charge is cheap, for example, at night time. The main heat storage operation may be performed so as to store a large part of the amount of heat used in one day in the hot water storage tank 4. The heat storage operation control unit 50a learns the total amount of heat used every day, and determines the target heat storage amount of the main heat storage operation based on information obtained by statistically processing the total amount of heat used in the past predetermined period, for example, the past two weeks. Also good. The additional heat storage operation is an operation of adding heat to the hot water storage tank 4 in order to prevent the hot water storage tank 4 from running out of hot water.

  The display control unit 50b controls display of display means provided in the kitchen remote control 25 and the bathroom remote control 26. The display means will be described later. The time measuring unit 50c measures time and date (may include day of the week).

  The hot water supply detection unit 50d detects whether or not hot water supply from the hot water storage unit 3 to the outside is being executed. The hot water supply detection unit 50d may detect whether or not the hot water supply to the faucet is being executed based on the output of the hot water supply flow rate sensor 19. The hot water supply detection unit 50d determines that the hot water supply to the faucet is being performed when the output of the flow sensor 19 for hot water supply is larger than the reference value, and determines that the hot water supply to the faucet is not being performed otherwise. May be.

  The hot water supply detection unit 50d may detect whether hot water supply to the bathtub is being executed based on the output of the bath flow sensor 21. The hot water supply detection unit 50d determines that hot water supply to the bathtub is being executed when the output of the bath flow sensor 21 is larger than the reference value, and otherwise determines that hot water supply to the bathtub is not being executed. May be.

  The hot water supply amount calculation unit 50e calculates the amount of hot water supply from the hot water storage unit 3 to the outside. The hot water supply amount calculation unit 50e may calculate the hot water supply amount to the faucet by integrating the hot water supply flow rate to the faucet detected by the hot water supply flow rate sensor 19. At that time, the hot water supply amount calculation unit 50e may convert the hot water supply amount at the actual hot water supply temperature detected by the hot water supply temperature sensor 20 into the hot water supply amount at a predetermined temperature (for example, 40 ° C.). The hot water supply amount calculation unit 50e may calculate the hot water supply amount to the bathtub by integrating the hot water supply flow rate to the bathtub detected by the bath flow sensor 21. At that time, the hot water supply amount calculation unit 50e may convert the hot water supply amount at the actual hot water supply temperature detected by the bath temperature sensor 22 into the hot water supply amount at a predetermined temperature (for example, 40 ° C.).

  The mode setting unit 50 f sets various control modes of the hot water storage type hot water heater 2 based on a user operation input to the kitchen remote control 25 or the bathroom remote control 26. For example, the mode setting unit 50f may be able to set “auto mode”, “more mode”, and the like as the control mode of the heat storage operation. The “automatic mode” is a mode in which, for example, the hot water storage tank 4 is controlled so as to secure an amount of heat based on an average total amount of heat used for a predetermined period in the past, for example, the past two weeks. The “higher mode” is a mode for controlling the hot water storage tank 4 to secure a larger amount of heat than the “automatic mode”.

  In the present embodiment, the mode setting unit 50f can set the “water supply mode”. The “water supply mode” is a control mode in which the mixing ratio of the low temperature water in the general hot water supply side electric mixing valve 7 is fixed to the maximum. In the “water supply mode”, the opening degree of the general hot water supply side electric mixing valve 7 may be fully closed on the hot water supply pipe 8 side and fully open on the water supply pipe 9 side. In cold districts, the mixed hot water pipe 10 in the hot water storage unit 3 and the hot water storage unit 3 keep the water flowing through the mixed hot water pipe 10 at night in order to prevent freezing of the pipe from the outside to the faucet. May be used. In such a usage, the amount of hot water used in the hot water storage tank 4 can be suppressed by setting the “water supply mode”. In the “water supply mode”, even when the opening degree of the hot water supply pipe 8 of the general hot water supply side electric mixing valve 7 is fully closed, minute hot water leaks from the gap of the valve body of the general hot water supply side electric mixing valve 7. As a result, the amount of hot water used in the hot water storage tank 4 does not become zero.

  FIG. 2 is an external view of the kitchen remote controller 25 provided in the hot water supply system 1 of the first embodiment. The kitchen remote controller 25 and the bathroom remote controller 26 have the same or similar basic configuration. In the following, the kitchen remote controller 25 will be described as an example, but the bathroom remote controller 26 is the same as the kitchen remote controller 25.

  As shown in FIG. 2, the kitchen remote control 25 includes an operation unit 29 and a display unit 30. The operation unit 29 has a plurality of input switches operated by the user. The user operates the operation unit 29 to set, for example, a hot water supply temperature, a command or reservation for hot water operation, a reheating operation, etc., selection of a heat storage operation control mode, and setting / non-setting of a “water supply mode” , Etc. can be input. The display unit 30 is configured using, for example, a flat display panel such as a liquid crystal display panel or an organic EL display panel. The display unit 30 can display information by visually displaying characters, figures, characters, and the like. The display unit 30 is an example of display means. The kitchen remote controller 25 may further include a voice guidance device or the like.

  FIG. 2 shows a state when the display screen of the display unit 30 is the top screen 31. The top screen 31 includes setting information 31a related to the control mode of the heat storage operation, the current time 31b, operation information 31c indicating whether or not the heat storage operation is being performed, and the amount of hot water or the amount of heat in the hot water storage tank 4 And calorie information 31d.

  The example of the top screen 31 shown in FIG. 2 is as follows. As the setting information 31a, “Omakase” is displayed. This indicates that the “automatic mode” is set. The characters “Uplifting” are displayed as the driving information 31c. This indicates that the heat storage operation is being executed. Characters “residual hot water 100L” are displayed as the residual hot water calorie information 31d. This indicates that the amount of hot water or heat in the hot water storage tank 4 is 100 L in terms of a predetermined temperature.

  The setting information 31 a is an example of first information regarding the setting of the hot water storage type hot water heater 2. 1st information is not restricted to this example, For example, you may include the information regarding the setting value of hot water supply temperature.

  The operation information 31 c and the remaining hot water calorie information 31 d are examples of second information related to the state of the hot water storage type hot water heater 2. The second information is not limited to this example, and may include, for example, information regarding whether or not a hot water operation, a chasing operation, hot water supply to a faucet, or the like is being executed.

  In the example illustrated in FIG. 2, the first information and the second information are displayed using characters, but the first information and the second information may be displayed using graphics, characters, and the like. The top screen 31 may include only one of the first information and the second information.

  In the present embodiment, the control device 50 and the kitchen remote controller 25 and the bathroom remote controller 26 are connected via a common wiring. The control device 50 can transmit information such as information related to the state of the hot water storage hot water heater 2 together with the destination information, so that the information addressed to the kitchen remote control 25 and the information addressed to the bathroom remote control 26 can be distinguished and transmitted. .

  In the present embodiment, it is possible to set the target value of the daily accumulated hot water supply amount to the faucet for the control device 50. The user can set the target value of the daily hot water supply amount to the faucet by operating the operation unit 29 of the kitchen remote controller 25 or the bathroom remote controller 26. When the integrated hot water supply amount to the faucet calculated by the hot water supply amount calculation unit 50e exceeds the target value, the control device 50 uses, for example, voice guidance from at least one of the kitchen remote controller 25 and the bathroom remote controller 26 for the user. May alert the user that the tap water has been used too much. Instead of the user setting a target value of the daily hot water supply amount to the faucet, the control device 50 determines the daily hot water supply amount to the faucet based on the actual value learned in the past predetermined period. A target value may be set.

  Similarly, the user may set the target value of the daily hot water supply amount to the bathtub by operating the operation unit 29 of the kitchen remote controller 25 or the bathroom remote controller 26. When the accumulated hot water supply amount to the bathtub of the day calculated by the hot water supply amount calculation unit 50e exceeds the target value, the control device 50 notifies the user by voice guidance from the kitchen remote controller 25 and the bathroom remote controller 26, for example. By notifying the user, the user may be alerted that the bath water is being used too much.

  As will be described below, the hot water supply system 1 according to the present embodiment has a function of performing guidance display including third information related to the amount of hot water supply on the display unit 30 of the kitchen remote control 25 and the bathroom remote control 26 immediately after the hot water supply is stopped. Have For a user who does not wish to perform the guidance display, the hot water supply system 1 may include means for enabling the user to set the guidance display ON / OFF. For example, the guidance display may be set to ON / OFF by the user operating the operation unit 29 of the kitchen remote controller 25 or the bathroom remote controller 26.

  Next, guidance display on the display unit 30 of the kitchen remote controller 25 and the bathroom remote controller 26 immediately after the hot water supply is stopped will be described with reference to FIGS. FIG. 3 is a flowchart showing a control operation of hot water supply system 1 according to the first embodiment.

  In step S1 of FIG. 3, the hot water supply detection unit 50d determines whether or not hot water supply to the faucet is being performed based on the output of the hot water supply flow rate sensor 19. When hot water supply to the faucet is being executed, that is, when hot water supply to the faucet has started, the process proceeds to step S2. If hot water supply to the faucet is not being executed, that is, if hot water supply to the faucet has not started, step S1 is repeated.

  When the hot water supply to the faucet is not being executed except immediately after the hot water supply to the faucet is stopped, the display unit 30 of the kitchen remote control 25 and the bathroom remote control 26 basically displays the top screen 31 described in FIG. Yes. “In principle” means, for example, unless a user operation that changes the display screen of the display unit 30 is input to the operation unit 29. In addition, when hot water is being supplied to the faucet, the display unit 30 of the kitchen remote controller 25 and the bathroom remote controller 26 displays the top screen 31 in principle. That is, during the hot water supply to the faucet, the display unit 30 of the kitchen remote control 25 and the bathroom remote control 26 continues to display the top screen 31. Thereby, the following effects are obtained. When the user is using the shower in the bathroom, other users in the kitchen are not prevented from seeing the top screen 31 of the kitchen remote control 25. Further, when the user is washing the dishes at the kitchen sink, other users in the bathroom are not prevented from seeing the top screen 31 of the bathroom remote control 26. Therefore, it is possible to prevent the convenience of each user from seeing information such as the setting information 31a, the operation information 31c, or the remaining hot water heat quantity information 31d.

  In step S2, the hot water supply amount calculation unit 50e calculates the hot water supply amount after the hot water supply to the current faucet starts by integrating the hot water supply flow rate of the hot water supply flow rate sensor 19 after shifting from step S1 to step S2. To do. The process proceeds from step S2 to step S3.

  In step S3, the hot water supply amount calculation unit 50e calculates the integrated hot water supply amount to the faucet on that day. That is, the hot water supply amount calculation unit 50e adds the hot water supply amount calculated in step S2 and the accumulated hot water supply amount to the faucet on the current day before the hot water supply to the current faucet starts, so Calculate the total hot water supply to The process proceeds from step S3 to step S4.

  In step S4, the timer 50c measures the continuous hot water supply time from the start of hot water supply to the faucet this time. The process proceeds from step S4 to step S5.

  In step S5, the hot water supply detection unit 50d determines whether or not hot water supply to the faucet is being performed based on the output of the hot water supply flow rate sensor 19. When the hot water supply to the faucet is being executed, that is, when the hot water supply to the faucet is not stopped yet, the process returns to step S2. When the hot water supply to the faucet is not being executed, that is, when the hot water supply to the faucet this time is stopped, the process proceeds to step S6.

  In step S6, the display control unit 50b determines whether or not the continuous hot water supply time to the current faucet timed in step S4 is 30 seconds or more. When the hot water supply continuous time is less than 30 seconds, this routine ends. In this case, the guidance display on the display unit 30 of the kitchen remote control 25 and the bathroom remote control 26 is not performed, and the display unit 30 of the kitchen remote control 25 and the bathroom remote control 26 continues to display the top screen 31.

  When the hot water supply continuous time is 30 seconds or more, the process proceeds from step S6 to step S7. In step S <b> 7, the display control unit 50 b transmits to the bathroom remote controller 26 information related to the current faucet hot water amount, the current faucet hot water amount, and the target faucet hot water amount, and command information for performing guidance display immediately after the hot water supply is stopped. The display unit 30 of the bathroom remote control 26 that has received the information performs a guidance display immediately after the hot water supply is stopped.

  FIG. 4 is a diagram illustrating a guidance display of the hot water supply system 1 according to the first embodiment. As shown in FIG. 4, the display part 30 of the bathroom remote control 26 performs the guidance display immediately after the hot water supply stop as follows. First, the screen of the display unit 30 is switched from the top screen 31 to the first guidance screen 32. The first guidance screen 32 is temporarily displayed. The time for which the first guidance screen 32 is displayed may be, for example, 5 seconds. Subsequently, the screen of the display unit 30 is switched from the first guidance screen 32 to the second guidance screen 33. The second guidance screen 33 is temporarily displayed. The time for which the second guidance screen 33 is displayed may be, for example, 5 seconds. Thereafter, the screen of the display unit 30 is returned from the second guidance screen 33 to the top screen 31, and the guidance display immediately after the hot water supply is stopped is terminated. As described above, since the guidance display is automatically ended and the display returns to the top screen 31, no user operation for returning to the top screen 31 is required, which is excellent in convenience.

  The first guidance screen 32 includes information on the current amount of tap water and information on the amount of tap water today. The faucet amount this time is the amount of hot water supply from the start to the stop of the hot water supply to the faucet this time. The amount of tap water this time is the value calculated in step S2. In the example of FIG. 4, the user is informed that the amount of tap water is 50L this time. The amount of tap water today is the accumulated amount of hot water supplied to the tap on that day. The amount of tap water today is the value calculated in step S3. In the example of FIG. 4, the user is informed that the amount of tap water is 400L today.

  The 2nd guidance screen 33 contains the information regarding the amount of target tap hot water, and the information regarding the amount of tap water today. The target faucet hot water amount is the target value of the daily accumulated hot water supply amount to the faucet described above. In the example of FIG. 4, the user is informed that the target tap water amount is 500 L. According to the present embodiment, by simultaneously displaying information on the target faucet hot water amount and information on the faucet hot water amount today, it is possible to inform the user in an easy-to-understand manner whether or not the faucet hot water is being used excessively.

  The process proceeds from step S7 to step S8. In step S <b> 8, the display control unit 50 b transmits to the kitchen remote controller 25 information related to the current faucet hot water amount, today's faucet hot water amount, and target faucet hot water amount, and command information for performing guidance display immediately after the hot water supply is stopped. The display unit 30 of the kitchen remote control 25 that has received the information performs a guidance display immediately after the hot water supply is stopped. The guidance display of the kitchen remote control 25 is the same as the guidance display of the bathroom remote control 26 described with reference to FIG.

  When the ON / OFF setting of the guidance display immediately after the hot water supply stop is set to OFF, the display control unit 50b displays information on the current tap water amount, the current tap water amount, and the target tap water amount, and the guidance display immediately after the hot water supply stop. The command information to be executed is not transmitted to the bathroom remote controller 26 and the kitchen remote controller 25. In this case, the bathroom remote controller 26 and the kitchen remote controller 25 do not perform the guidance display as described above immediately after the hot water supply is stopped, and the display unit 30 remains the top screen 31. Thereby, it is possible to cope with a user who does not wish to perform guidance display.

  The faucet hot water amount is an example of third information regarding the hot water supply amount from the start to the stop of the hot water supply. In the present embodiment, after the hot water supply is stopped, the third information is displayed instead of the top screen 31 including the first information related to the setting of the hot water storage type hot water heater 2 and the second information related to the state of the hot water storage type hot water heater 2. By displaying the first guidance screen 32 including the following, the following effects can be obtained. There is a high possibility that the user looks at the display unit 30 of the kitchen remote controller 25 or the bathroom remote controller 26 immediately after the use of the hot water supply is stopped. The visual effect when switching from the top screen 31 to the first guidance screen 32 can attract the user's line of sight. By displaying the third information instead of at least one of the first information and the second information, the display area of the third information can be increased. Accordingly, the user can be surely notified of the third information, that is, information on the current hot water supply amount. As a result, excessive use of the user's hot water can be reliably suppressed.

  As described above, in the present embodiment, the display unit 30 of the kitchen remote controller 25 and the bathroom remote controller 26 continues to display the top screen 31 during hot water supply to the faucet. For this reason, even when the user uses the shower for a long time in the bathroom, it is not hindered when another user in the kitchen wants to check the information on the top screen 31 of the kitchen remote controller 25. Further, even when the user has been washing dishes for a long time at the kitchen sink, when other users in the bathroom want to check the information on the top screen 31 of the bathroom remote control 26, this is not hindered.

  In the present embodiment, the timing at which the guidance screens 32, 33 are displayed on the display unit 30 of the bathroom remote control 26, compared to the timing at which the guidance screens 32, 33 are displayed on the display unit 30 of the kitchen remote control 25 (step S8). (Step S7) is early. Thereby, the following effects are obtained. In general, a user who uses a faucet (shower) in a bathroom is more likely to see the remote control than a user who uses the faucet in the kitchen. For this reason, the convenience is further enhanced by transmitting information to the bathroom remote control 26 first and displaying the guidance screens 32 and 33 earlier. The display unit 30 of the bathroom remote control 26 is an example of a display unit in the bathroom, and the display unit 30 of the kitchen remote control 25 is an example of a display unit outside the bathroom.

  In the present embodiment, the following effects can be obtained by performing the process of step S6. When the time from the start to the stop of hot water supply, that is, the continuous hot water supply time is less than a standard (for example, 30 seconds), the guidance screen is not displayed and the top screen 31 is maintained. If the guidance display is displayed at the time of short-time hot water discharge from the faucet or a small amount of unintentional hot water from the faucet, the troublesomeness or discomfort caused by the display on the display unit 30 flickering to the user. May give. In the present embodiment, such a situation can be prevented. Instead of the hot water supply continuous time, when the amount of hot water supply from the start to the stop of hot water supply is less than a standard (for example, 30 L), the guidance screen is not displayed and the top screen 31 may be maintained. Even in that case, an effect similar to the above can be obtained.

  When the “water supply mode” is set, the control device 50 may perform control so as not to perform the guidance display immediately after the hot water supply is stopped. There is a possibility that some users mistakenly recognize that no hot water is used when the “water supply mode” is set. As described above, in practice, even when the “water supply mode” is set, a small amount of hot water leaks from the gap of the valve body of the general hot water supply side electric mixing valve 7, so that hot water is used. The amount will not be zero. If the information on the amount of hot water supply is displayed for such a small amount of use, there is a possibility of giving the user an unnecessary discomfort. In order to eliminate such a possibility, when the “water supply mode” is set, it is desirable not to display the guidance immediately after the hot water supply is stopped.

  Today's faucet hot water amount is an example of the fourth information related to the accumulated hot water supply amount on that day. In the present embodiment, on the first guidance screen 32, the fourth information (the amount of faucet hot water today) is displayed together with the third information (the amount of faucet hot water this time). Not only such a configuration but also the fourth information (today faucet hot water amount) may be displayed after the third information (current tap water amount) is displayed.

  The target faucet hot water amount is an example of fifth information relating to a target value of the accumulated hot water supply amount per day. In the present embodiment, on the second guidance screen 33, the fifth information (target tap water amount) is displayed together with the fourth information (today tap water amount). Not only in such a configuration, the fifth information (target tap water amount) may be displayed after the fourth information (today tap water amount) is displayed.

  In the present embodiment, the case where guidance display after hot water supply stop for hot water supply to the faucet has been described has been described as an example. Not only such an example but the guidance display after the hot water supply stop with respect to the hot water supply to a bathtub may be implemented similarly. In that case, information to be displayed on the guidance screen can be created based on the information detected by the bath flow sensor 21. On the guidance screen, the amount of hot water supplied to the bathtub this time (the amount of hot water supplied this time), the amount of hot water supplied to the bathtub of the day (the amount of hot water supplied today), and the target value of the amount of hot water supplied to the bathtub for the day (target amount of bath water) Such information may be displayed. If the control device 50 transmits information such as the amount of hot water supply to the kitchen remote control 25 and the bathroom remote control 26 together with the type information for distinguishing between the guidance display after the hot water supply stop to the faucet and the guidance display after the hot water supply stop to the bathtub, Good.

  Each function of control device 50 included in hot water supply system 1 of the first embodiment may be realized by a processing circuit. The processing circuit of the control device 50 may include at least one processor and at least one memory. When the processing circuit includes at least one processor and at least one memory, each function of the control device 50 may be realized by software, firmware, or a combination of software and firmware. At least one of software and firmware may be described as a program. At least one of the software and firmware may be stored in at least one memory. The at least one processor may realize each function of the control device 50 by reading and executing a program stored in at least one memory. The at least one memory may include a nonvolatile or volatile semiconductor memory, a magnetic disk, or the like.

  The processing circuit of the control device 50 may include at least one dedicated hardware. When the processing circuit includes at least one dedicated hardware, the processing circuit may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-). (Programmable Gate Array) or a combination thereof. The function of each unit of the control device 50 may be realized by a processing circuit. Further, the functions of the respective units of the control device 50 may be realized together by a processing circuit. A part of each function of the control device 50 may be realized by dedicated hardware, and the other part may be realized by software or firmware. The processing circuit may realize each function of the control device 50 by hardware, software, firmware, or a combination thereof.

  The configuration is not limited to the configuration in which the operation of the hot water supply system 1 is controlled by a single control device, and the configuration may be such that the operation of the hot water supply system 1 is controlled by cooperation of a plurality of control devices.

DESCRIPTION OF SYMBOLS 1 Hot water supply system, 2 Hot water storage type water heater, 3 Hot water storage unit, 4 Hot water storage tank, 5a 1st temperature sensor, 5b 2nd temperature sensor, 5c 3rd temperature sensor, 5d 4th temperature sensor, 5e Temperature sensor, 6 Temperature sensor, 7 General hot water supply side electric mixing valve, 8 Hot water supply pipe, 9 Water supply pipe, 10 Mixed hot water supply pipe, 11 Bath hot water supply side electric mixing valve, 12 Bath side circulation circuit, 13 Solenoid valve, 14 Bath circulation pump, 15 Heat Exchanger, 16 Tank side circulation circuit, 17 Circulation pump, 18 Mixed bath pipe, 19 Flow rate sensor for hot water supply, 20 Temperature sensor for hot water supply, 21 Flow rate sensor for bath, 22 Temperature sensor for bath, 23 Water temperature sensor, 24 Heat storage circuit , 25 Kitchen remote control, 26 Bathroom remote control, 27 Circulation pump, 28 Heat pump unit , 29 operation unit, 30 display unit, 31 top screen, 31a setting information, 31b current time, 31c operation information, 31d residual heat quantity information, 32 first guidance screen, 33 second guidance screen, 50 control device, 50a Thermal storage operation control unit, 50b display control unit, 50c timing unit, 50d hot water detection unit, 50e hot water supply amount calculation unit, 50f mode setting unit

Claims (7)

A water heater,
Means for detecting whether hot water supply from the water heater is being executed;
Means for calculating the amount of hot water supplied from the water heater;
Display means;
Control means for controlling the display of the display means;
With
When hot water is being supplied from the water heater, and when hot water is not being executed from the water heater except after hot water is stopped, first information relating to the setting of the water heater and second relating to the state of the water heater At least one of the information is displayed on the display means, and after the hot water supply from the water heater is stopped, the third information regarding the hot water supply amount from the start to the stop of the hot water supply is the first information and the second information. Instead of at least one of the information, a hot water supply system temporarily displayed on the display means.   4. The hot water supply system according to claim 1, wherein after the third information is displayed, or together with the third information, fourth information relating to the accumulated hot water supply amount on the day is temporarily displayed on the display means.   5. The hot water supply system according to claim 2, wherein after the fourth information is displayed, or together with the fourth information, fifth information related to a target value of an integrated hot water supply amount per day is temporarily displayed on the display unit. .   The third information is not displayed on the display means after the hot water supply from the water heater is stopped when the time from the start to the stop of the hot water supply or the amount of hot water supply is less than the standard. The hot water supply system according to item. The display means includes a display unit in the bathroom installed in the bathroom, and a display unit outside the bathroom installed in a place other than the bathroom,
The timing at which the third information is displayed on the display section in the bathroom is earlier than the timing at which the third information is displayed on the display section outside the bathroom after the hot water supply from the water heater is stopped. Item 5. A hot water supply system according to any one of items 4 to 6.   6. The apparatus according to claim 1, further comprising a unit that allows a user to set in advance whether or not to display the third information on the display unit after hot water supply from the water heater is stopped. Hot water system. A mixing means for mixing high-temperature water and low-temperature water supplied from a water source;
Means capable of setting a water supply mode for fixing the mixing ratio of the low-temperature water to the maximum;
With
The hot water supply system according to any one of claims 1 to 6, wherein when the water supply mode is set, the third information is not displayed on the display means after hot water supply from the water heater is stopped.

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