JP6959192B2 - Hot water supply system - Google Patents

Description

The present invention relates to a hot water supply system.

Especially when taking a bath in winter, it is known that there is a risk of heat shock that causes myocardial infarction or stroke due to a sudden temperature change when moving from the bathroom (outside air) to a bathtub filled with hot water.

According to Patent Document 1, a water heater that reduces a temperature change by lowering the initial hot water filling temperature Ts by a set temperature Td lower than the bathtub target temperature Tg is disclosed. Further, after the set delay time tc elapses from the start of bathing and the systolic blood pressure reaches the maximum value, the hot water in the bathtub 3 is reheated to the bathtub target temperature Tg (0050,0054).

According to Patent Document 2, when the outside air temperature is equal to or lower than a predetermined temperature, a heating hot water filling operation is performed to notify the user to open the bath lid. The heating hot water filling is higher than the bath set temperature (42 ° C.), and hot water is supplied at a predetermined heating temperature (50 ° C.) that can generate a large amount of steam in the bathroom. After that, hot water lower than the set temperature (38 ° C.) is supplied, it is confirmed that the bath set temperature and the bath set amount have been reached, and the supply of hot water to the bathtub 17 is stopped (0027-0029).

JP-A-2018-84383 JP-A-2018-48795

In order to suppress the occurrence of heat shock, for example, it is desired to adjust the hot water temperature at the initial stage of bathing so that it is not too high, but if the hot water temperature is too low, there is a risk of causing discomfort to the bather. In addition, the temperature of the hot water used when taking a bath is higher than the normal body temperature (about 36 ° C), and at least when the bath is started, the bath lid is removed, so heat exchange between the bathroom air and the hot water As the bath starts, the temperature of the hot water drops further from the initial temperature.

Patent Document 1 attempts to bring the target temperature closer to the target temperature by reheating, but the heat exchange efficiency of reheating is usually inferior to that of high-temperature adding hot water, and it takes a relatively long time to raise the hot water temperature.

Patent Document 2 is difficult to exert its effect unless the bath lid is removed in advance, and if the bath lid is left as it is, the energy consumption is increased because the temperature is excessively increased and the temperature is lowered by water injection. In addition, since the heat dissipation from the hot water in the bathtub is due to natural convection, the heat exchange rate is low, and after hot water is poured above the set temperature within the hot water filling time, hot water below the set temperature is immediately supplied for cooling. , I can't expect much heat exchange with the bathroom.

The present invention made in view of the above circumstances
A hot water supply unit that supplies hot water to the bathtub,
The target bath temperature setting unit that accepts the target bath temperature command,
The hot water beam command unit that accepts the hot water beam start command,
An outside air temperature sensor that acquires the temperature of the outside air or the bathroom, or an information transmitter / receiver that acquires the heat shock forecast,
When the command to start hot water filling is received, it is possible to start hot water filling at a temperature higher than the target bath temperature based on the detection result of the outside air temperature sensor or the information including the heat shock forecast, and the hot water filling is started. In this case, the hot water supply speed from the hot water supply unit is lower than the hot water supply speed at the time of normal hot water supply.

Configuration diagram of the hot water supply system of Example 1 Example 1 (a) External view and target bath temperature setting screen of the remote controller device, (b) Water volume setting screen, (c) Heat shock suppression function setting screen Configuration diagram of an information communication system including the water heater of the first embodiment Control flowchart of the hot water supply system of the first embodiment

Hereinafter, examples of the present invention will be described with reference to the accompanying drawings. In the following description, a hot water supply system using a heat pump as a heat source machine for heating water to generate hot water will be described as an example, but a gas combustor may be used as the heat source machine.

Although a plurality of procedures are described in order in the control method and the computer program of the present invention, the order of description does not limit the order in which the plurality of procedures are executed. Therefore, the order of the procedures of the control method shown in the embodiment of the present invention can be changed as long as the contents are not hindered.

[Hot water supply system]
FIG. 1 is a configuration diagram of a hot water supply system including the water heater 11 of the first embodiment. The water heater 11 has a heat pump unit 13, a hot water storage tank 12 for storing the generated hot water, a hot water storage amount detection unit for detecting the amount of hot water in the hot water storage tank 12, and a hot water supply heat exchanger as parts for storing and generating hot water. It has 14 and a repulsion heat exchanger 18.
Further, the water heater 11 has a remote control device 6 that receives an operation of the user in relation to control and the like, a control board 10 as an example of a control unit that operates in response to an operation from the remote control device 6, and an outside air temperature. Presence or absence of an outside air temperature sensor 40 to detect, a water level sensor 41 to detect fluctuations in the water level of the bathtub 15, a bathtub temperature sensor (not shown) to detect the temperature of hot water in the bathtub 15, and a lid (bath lid) of the bathtub 15. It has a lid sensor 51 for detecting the above. The outside air temperature sensor 40 may detect the temperature of the bathroom 50 instead of the outside air (outdoor temperature). Further, as the lid sensor 51, for example, a mechanical switch that can be provided on the upper surface of the bathtub 15 (the surface on which the bath lid is placed), a weight sensor, an optical sensor that can detect the presence or absence of an object at a short distance, and the like can be adopted.
Further, the water supply machine 11 includes a gas introduction unit or agitating unit attached to the adapter 52 of the bathtub 15, and a flow switch 43 for sucking hot water necessary for the operation of the gas introduction unit or the agitation unit from the bathtub 15.

The heat pump unit 13 can heat water supplied from a water pipe 19 as an example of a fresh water source through a pipe 20 to generate hot water and supply it to a hot water storage tank 12. The hot water in the hot water storage tank 12 can be supplied to the bathtub 15 arranged in the bathroom 50. As the fresh water source, an external water supply source such as a water pipe 19 or well water can be adopted. Fresh water refers to water before use that has not yet been in a state where the user can come into direct contact with it, and includes water from a water supply source and water stored in a hot water storage tank 12, while in a bathtub 15 or the like. Not used water containing dirt as supplied. The water heater 11 includes a general hot water supply circuit 21 that supplies hot water to a general hot water supply terminal (faucet, shower, mixing tap 17, etc.) and a hot water supply circuit that has a hot water supply unit that supplies hot water to the bathtub 15. The flow rate at the time of hot water supply is controlled by the flow rate adjusting valve 31 distributed in the middle of the general hot water supply circuit 21, and the flow rate can be changed by the instruction from the main body side control board 10.

The hot water supply heat exchanger 14 heats the low-temperature water from the water pipe 19 by exchanging heat with the hot water in the hot water storage tank 12, and generates hot water for hot water supply to be used in a place different from the bathtub 15. For example, hot water for showers, faucets, etc. in the kitchen or bathroom 50 can be generated. The amount of hot water discharged from the hot water supply system can be detected by a flow rate sensor (not shown). It is preferable that the amount can be distinguished from the amount. It is more preferable that the amount of water supplied to the shower, faucet, or the like can be measured from the hot water supply heat exchanger 14. The water heater calculates the amount of residual hot water in the tank from each temperature sensor attached to the hot water storage tank 12, and when using heat by discharging hot water or exchanging heat, the cumulative flow rate increases or decreases from the difference in the amount of residual hot water before and after that. It is possible to grasp.
The repulsion heat exchanger 18 heats the bath water drawn out from the bathtub 15 by exchanging heat with the hot water in the hot water storage tank 12.
When the water level sensor 41 detects a sudden rise in water level, it can determine that a person has taken a bath, and when it detects a sudden drop in water level, it can determine that a person has taken a bath.

The gas introduction unit can agitate the hot water in the bathtub 15 with a gas. A hose that discharges air is attached to the bathtub 15, and operates like a jet bath. As a result, the hot water in the bathtub 15 becomes turbulent and undulates and dissipates heat, so that heat exchange with the air in the bathroom 50 is performed, and the room temperature can be raised. As the gas introduced into the bathtub 15 by the gas introduction unit, it is preferable to use the gas in the bathroom 50, that is, it is preferable that one end of the hose communicates with the bathroom 50 and the other end communicates with the inner surface of the bathtub 15. By doing so, the gas in the bathroom 50 can effectively exchange heat with the hot water in the bathtub 15, so that the bathroom 50 can be easily warmed.

Instead of the gas introduction section, a bath circulation pump 42 as a stirring section for forcibly circulating and stirring the hot water in the bathtub 15 may be provided, but the gas introduction section is preferable to the stirring section. If it is a gas introduction part, gas is introduced into the hot water of the bathtub 15, so even if the bathtub 15 is covered with a bath lid, the bathtub lid will be lifted due to the high pressure inside the bathtub 15, and the bathroom 50 will be lifted. Gas leaks to the side, making it easier for heat exchange to proceed.

[Remote control device 6]
FIG. 2 is an external view of the remote controller device 6a or 6b, a target bath temperature setting screen, (b) a water amount setting screen, and (c) a heat shock suppression function setting screen.

The remote controller 6 (the bath remote controller 6a in the bathroom and the kitchen remote controller 6b provided in a room other than the bathroom (for example, the kitchen)) has a sounding unit 33, an operation unit 4 for receiving user operations, and various information. A display unit 5 for displaying is provided.
The operation unit 4 includes a hot water command unit 41, a water amount setting unit 42, a target bath temperature setting unit 43, a hot water filling command unit 44, a reheating command unit 45, and a level setting unit 49.
The display unit 5 includes a hot water supply temperature display unit 51, a hot water supply amount display unit 52, and a target bath temperature display unit 53.

When the addition hot water command unit 41 is operated, a predetermined amount of hot water water at a temperature of, for example, indicated on the hot water supply temperature display unit 51 is supplied to the bathtub 15.
When the water amount setting unit 42 is operated, the hot water amount display unit 52 is displayed, and the hot water amount at the time of hot water filling can be changed through the operation of the level setting unit 49.
When the target bath temperature setting unit 43 is operated, the target bath temperature display unit 53 (the temperature displayed on the target bath temperature display unit 53) is displayed, and the hot water filling command and the reheating command are displayed through the operation of the level setting unit 49. You can change the target temperature at the time.
When the hot water beam command unit 44 is operated, hot water is supplied to the bathtub 15 by an amount of hot water having a target bath temperature displayed on the hot water flow amount display unit 52. However, as will be described later, when the detection temperature of the outside air temperature sensor 40 is relatively low, in this embodiment, the amount of hot water having a temperature lower than the target bath temperature is less than the amount displayed on the hot water amount display unit 52. It is supplied to the bathtub 15.
When the reheating command unit 45 is operated, a part of the hot water stored in the bathtub 15 is supplied to the repelling heat exchanger 18, which is heated by exchanging heat with the high temperature water in the hot water storage tank 12 and returned to the bathtub 15. ..
Further, through the operation of the menu button 48, the screen transitions to the screen as illustrated in FIG. 2 (c). By operating this screen, it is possible to switch ON / OFF of the heat shock suppression control.
When the hot water beam started by the hot water beam command unit 44 is completed, the sounding unit 33 can output a voice or the like to notify the fact.

Further, the date information can be set in the remote controller 6 through the level setting unit 49. The date information may be acquired through the telecommunication line network 103 described later.

FIG. 3 is a configuration diagram of an information communication system including the water heater 11 of the first embodiment. The water heater 11 is informationally connected to the other home appliances 106, 107, and 108 at the house 105 via the HEMS (Home Energy Management System) controller 101. The HEMS controller 101 is connected to an information server 102 installed outdoors in the house and a portable user terminal 104 via a telecommunication line network 103. The telecommunications line network 103 includes the Internet, an intranet, a local area network, and the like.

In this way, the water heater 11 can send and receive information to and from other devices and the information server 102.

[Heat shock suppression control by hot water supply system]
FIG. 4 is a flowchart of heat shock suppression control of the hot water supply system of this embodiment. When the hot water supply command is issued by the operation of the hot water supply command unit 44 (step S100), it is confirmed whether or not the heat shock suppression control illustrated in FIG. 2C is ON. When it is ON (step S200, Yes), it is confirmed whether the detection temperature of the outside air temperature sensor 40 is low, and when it is low (step S210), the sounding unit 33 first notifies that the heat shock should be taken care of (step S200). S300). When the heat shock suppression control is OFF or the outside air temperature is not low (step S200, No or step S210, No), hot water is poured according to the target bath temperature, water amount setting, and hot water filling speed set in the remote controller 6. (Step S211). The hot water filling speed is the time from the start of hot water filling to the end of hot water filling, and can be a value obtained by dividing the amount of hot water supplied to the bathtub 15 by the end of hot water filling. The hot water filling speed in this case may be referred to as a normal hot water filling speed. Further, the end of hot water can be said to mean, for example, when the sounding unit 33 notifies the user that the input is ready. Further, as the normal hot water filling speed, it may be calculated by the time from the hot water filling start to the hot water filling end as described above, but the hot water filling speed is lowered due to some special control at the end of the hot water filling. Therefore, it may be calculated by dividing the cumulative flow rate from the start of hot water filling to the elapse of a predetermined time, for example, to the elapse of 5 minutes by a predetermined time.

After step S300, it is confirmed whether the lid sensor 51 detects the bath lid (step S310). If the lid sensor 51 does not detect the bath lid, hot water filling is started at a hot water temperature exceeding the temperature set as the target bath temperature (step S311). For example, hot water can be poured at a temperature 1 ° C. or higher and 4 ° C. or lower, preferably 3 ° C. or lower, higher than the target bath temperature. At this time, it is preferable to set the amount of hot water to be smaller than the amount of water set in step S320 because there is a possibility that water is added in step S332. Further, the hot water is poured at a low speed (low flow rate) as compared with the normal hot water filling as in step S211. As a result, the amount of heat exchange between the hot water and the air in the bathroom 50 can be increased.

When the lid sensor 51 detects the bath lid or in the case of a hot water supply system without the lid sensor 51 (that is, when the presence or absence of the bath lid cannot be detected or the presence or absence of the bath lid is unknown), the bath temperature is lower than the target bath temperature. Hot water filling is started at a temperature and an amount of water less than the water amount setting (step S320). For example, hot water can be poured at a temperature 2 ° C. or higher and 3 ° C. or lower lower than the target bath temperature, and 20 L or more and 40 L or less lower than the water volume setting. If the lid sensor 51 is not provided, it may be branched into steps S310 and No.

When the hot water has been discharged by the amount of water specified in each of steps S320 and 311, the operation of the stirring unit or the gas introducing unit starts (step S330). For example, after operating for a predetermined time, it is confirmed whether the hot water temperature exceeds the bath target temperature (step S331), and if it is high, water is supplied to supply low temperature water (steps S331, Yes, step S332). The water supply can supply water from a fresh water source, for example. When the hot water temperature is not high (steps S331, No) or after the completion of the water addition, the sounding unit 33 notifies the completion of the hot water filling (step S340).

After that, when bathing is detected by the water level sensor 41 and the hot water temperature is lower than the target bath temperature (step S350, Yes), it is higher than the current hot water temperature that can be acquired by the bathtub temperature sensor immediately or after waiting for a predetermined time. Addition hot water is made with hot water (step S360). The footbath is preferably carried out until the target bath temperature is reached. Further, it is preferable that the additional hot water is added at least until the water amount setting is reached.

When the water level sensor 41 detects bathing (step S400, Yes), it waits for a predetermined time to elapse and confirms whether the cumulative flow rate from the hot water storage tank 12 from the time of bathing to the present is small. When the cumulative flow rate is small (step S410, Yes), the bathing is expected to end, so the sounding unit 33 notifies that the person is wary of heat shock (step S420). At this time, it is preferable to also notify that the bath lid should be left removed. Further, if the temperature of the bathtub 15 is low, reheating or high-temperature adding hot water can be performed (step S430). Further, as in the present embodiment, the water heater 11 that detects the flow rate by using a plurality of temperature sensors provided in the hot water storage tank 12 cannot detect the hot water discharge within the range that does not straddle the two temperature sensors, but the temperature. It is preferable to provide a large number of sensors so that the flow rate can be detected in detail.

In step S210, the heat shock forecast acquired from the information server 102 or the like may be used instead of the temperature of the outside air or the bathroom 50 by the outside air temperature sensor 40. Further, the outside air temperature may be acquired from the information server 102 or the like instead of the outside air temperature sensor 40.

The notification in step S300 to be careful of heat shock includes a message such as "Be careful of heat shock because it is cold today" and a different message depending on the detection result of the lid sensor 51, for example, "Bath lid". You can make messages such as "Because the bath is open, the temperature is higher than the setting." And "Because the lid of the bath is closed, the temperature is lower than the setting."

(Supplement to each step)
When the lid sensor 51 detects in step S310 that the bath lid is not placed at the time of hot water filling, the water heater 11 can start hot water filling at a temperature higher than the target bath temperature. Then, since the hot water filling starts at a higher temperature, heat exchange with the air in the bathroom 50 can be expected.

The user may be able to set how much the hot water temperature in steps S311 / S320 is higher / lower than the target bath temperature.

In step S330, when the bath lid is not placed, the air in the bathroom 50 is more likely to be warmed by the operation of the gas introduction unit or the stirring unit. Even when the bath lid is placed, heat exchange with the air in the bathroom 50 is likely to occur, as described above, especially when the gas introduction portion is operated.
In step S330, when the gas introduction unit or the stirring unit attached to the adapter 52 starts operating, the flow switch 43 sucks the hot water in the bathtub 15. Here, in the water heater 11 of the present embodiment, the amount of hot water in step S311 or S320 can be limited so as not to be less than the amount of water required for the adapter 52 to be able to suck hot water. This minimum amount of water can be set, for example, by being measured in advance by the installer of the water heater 11 and input to the control board 10.

The voice output of the completion of the hot water in step S340 may be performed at the stage when steps S311 and 320 are completed, but after the gas introduction unit or the stirring unit is operated to warm the bathroom 50, or if necessary. It is preferable to carry out the watering after performing the watering. As a result, it is possible to notify the completion of hot water filling after warming the bathroom 50 or preferably adjusting the bathtub temperature. Further, when step S311 is executed, it is possible to simply wait until the detection value of the bathtub temperature sensor drops to the set temperature (for example, the target bath temperature) and then notify the completion of the hot water filling. In this way, the bather can be notified at an appropriate timing of bathing.

The temperature of the footbath in step S360 may be substantially equal to or higher than the target bath temperature. If it is higher, it is preferable from the viewpoint that the target bath temperature can be approached at an early stage.
Since the hot water supply system of this embodiment is a heat pump type, the thermal efficiency can be improved by raising the hot water temperature with additional hot water instead of reheating.

With the above control, it is possible to automatically set the amount of water when bathing is started while preventing the user's heat shock, so that it is possible to take a bath safely. In addition, since the hot water is added at a temperature lower than the target bath temperature and less than the amount set in the water volume setting section and hot water is added after bathing is detected, the target bath temperature can be approached earlier than the reheating, and the thermal efficiency can be approached. May be good.

In step S420, the notification to warn of heat shock is "Please go up with the bath lid open." Or "If there is a person to enter next, open the bath lid to prevent heat shock. This is a notification to warn the current or next bather of heat shock, such as "Please stay up." As a result, it is possible to suppress heat shock not only for the first person who took a bath but also for the second and subsequent people to take a bath.

This notification may be performed for the first time when the cumulative amount of hot water supplied for a predetermined time is equal to or less than the predetermined time after the water level sensor 41 detects that the bather has left the bathtub, as in step S410. It is conceivable that the bather who has come out of the bathtub 15 is temporarily out of the bathtub 15 to wash his / her body, etc., instead of finishing the bathing. In that case, some hot water is discharged from the hot water supply tank 12 because a shower or the like will be used. Since it is preferable that the above notification is given when the bather finishes bathing, the cumulative amount of hot water supplied is measured, and when the amount is equal to or less than a predetermined amount, caution can be effectively urged.

In addition, instead of step S200, the date information acquired by the remote controller 6 is used to notify the user to be careful about heat shock at a time when it is considered necessary to pay attention to heat shock such as winter. May be good.

Unlike the present embodiment, when the lid sensor 51 is not provided, the remote controller 6 may select in advance whether to execute steps S311 or S320 branched from step S310. Further, for example, step S330 does not have to be executed.
The present application includes the following technical ideas.
A hot water supply unit that supplies hot water to the bathtub,
The target bath temperature setting unit that accepts the target bath temperature command,
The hot water beam command unit that accepts the hot water beam start command,
It has an outside air temperature sensor, which acquires the outside air or bathroom temperature or heat shock forecast,
When the command to start hot water filling is received, it is possible to start hot water filling at a temperature higher than the target bath temperature based on the detection result of the outside air temperature sensor or the information including the heat shock forecast, and the hot water filling is started. In the case of a hot water supply system, the flow rate per unit time from the hot water supply unit is smaller than the flow rate per unit time during normal hot water filling.

4 ... Display unit 5 ... Operation unit 6 ... Remote control device 6a ... Bath remote control 6b ... Kitchen remote control 10 ... Main unit side control board 11 ... Water heater 12 ... Hot water storage tank 13 ... Heat pump unit 14 ... Hot water supply heat exchanger 15 ... Bath 16 ... Tank unit 17 ... Mixing tap 18 ... Discharge heat exchanger 19 ... Water pipe 20 ... Piping 21 ... General hot water supply circuit 28 ... Hot water supply circulation pump 29 ... Hot water supply temperature sensor 30 ... Tank upper temperature sensor 31 ... Flow control valve 33 ... Sounding part 40 ... Outside air temperature sensor 41 ... Water level sensor (bathing / bath detection unit)
42 ... Bath circulation pump 43 ... Flow switch 50 ... Intake hose 51 ... Bathtub lid sensor 52 ... Adapter 101 ... HEMS controller 102 ... Information server 103 ... Telecommunications Line network 104 ・ ・ ・ User terminal 105 ・ ・ ・ Inside the house

Claims (12)

A hot water supply unit that supplies hot water to the bathtub,
The target bath temperature setting unit that accepts the target bath temperature command,
The hot water beam command unit that accepts the hot water beam start command,
It has an outside air temperature sensor that acquires the temperature of the outside air or the bathroom, or an information transmitter / receiver that acquires a heat shock forecast.
When the command to start hot water filling is received, it is possible to start hot water filling at a temperature higher than the target bath temperature based on the detection result of the outside air temperature sensor or the information including the heat shock forecast, and the hot water filling is started. In the case of a hot water supply system, the hot water supply speed from the hot water supply unit is lower than the hot water supply speed at the time of normal hot water supply. A bathtub temperature sensor capable of detecting the temperature of hot water in the bathtub and
It has a notification unit for notifying the hot beam completion, and
Before operating the notification unit, the hot water supply unit determines whether the detection temperature of the bathtub temperature sensor is higher than the target bath temperature, and if it is higher, supplies cold water lower than the detection temperature of the bathtub temperature sensor. The hot water supply system according to claim 1, wherein the notification unit is operated after that, or after waiting until the detection temperature of the bathtub temperature sensor drops to a substantially target bath temperature. A water volume setting unit that accepts commands for the amount of hot water,
Bathing detection unit and
It has a bathtub temperature sensor capable of detecting the temperature of hot water in the bathtub.
When the command to start the hot water filling is received, the hot water filling with a water amount smaller than the hot water filling amount is started.
After detecting bathing after the start or completion of the hot water filling, the hot water supply unit adds hot water at a temperature higher than the detection temperature of the bathtub temperature sensor when the detection temperature of the bathtub temperature sensor is lower than the target bath temperature. The hot water supply system according to claim 1 or 2, which is a heat pump type capable of performing the above. Hot water is applied at a temperature lower than the target bath temperature.
The hot water supply system according to claim 3, wherein the temperature of the hot water in the bathtub is raised by the additional hot water. A gas introduction unit that can supply gas to the hot water in the bathtub, or
A stirring unit that stirs the hot water in the bathtub without using gas, and
It has a notification unit that notifies the completion of hot water filling,
Claims 1 to 1, wherein the gas introduction unit or the stirring unit operates after a part or all of the hot water discharged by the execution of the hot water beam is completed and before the notification of the completion of the hot water filling by the notification unit. 4 The hot water supply system according to any one of the items. The amount of working water required for the gas introduction unit or the stirring unit to act on the hot water can be detected or set.
The hot water supply system according to claim 5, wherein the gas introduction unit or the stirring unit operates after the hot water discharge of the working water amount or more is executed. The hot water supply system according to claim 5 or 6, further comprising the gas introduction unit that introduces air in a bathroom into hot water in a bathtub. It has a lid sensor that detects whether or not the lid of the bathtub is placed on the bathtub.
When the command to start hot water is received, when the lid sensor detects that there is no lid, hot water is poured at a hot water temperature higher than the target bath temperature based on the detection result of the outside air temperature sensor or the heat shock forecast. The hot water supply system according to any one of claims 1 to 7, wherein the hot water supply system can be used. It has a lid sensor that detects whether or not the lid of the bathtub is placed on the bathtub.
The hot water supply system according to any one of claims 1 to 8, wherein when the lid sensor detects the presence of a lid, hot water can be poured at the target bath temperature. The hot water supply system according to any one of claims 1 to 9, wherein after detecting bathing, a notification to warn of heat shock is given after detecting bathing. Hot water can be supplied to the shower or faucet in the bathroom,
The hot water supply according to claim 10, wherein after the detection of bathing, when the cumulative flow rate from the place including the shower and the curan within a predetermined time is equal to or less than the predetermined time, a notification to warn of heat shock is given. system. Date information can be obtained,
The hot water supply system according to any one of claims 1 to 11, wherein, according to the date information, a notification to be careful about heat shock is given at the start of hot water filling.

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