JP7066564B2 - Bath water heater - Google Patents

Description

The present invention relates to a bath hot water supply device, and more specifically, to a bath hot water supply device having a built-in bath heat retention device that automatically reheats water (hot water) filled in a bathtub. be.

As shown in Patent Document 1, the conventional bath heat insulating device estimates the interval time required for the heat insulating operation and the time required for the reheating operation by the bath heat insulating device, and keeps the heat at appropriate time intervals. there were.

Further, although not described in Patent Document 1, in the case of heat retention operation, the user does not always take a bath immediately after the reheating operation is completed, so that the set temperature set in advance by the remote controller is taken into consideration for heat dissipation over time. The reheating operation was finished after reaching a temperature higher than the predetermined temperature.

Japanese Unexamined Patent Publication No. 11-1193956

However, with this conventional one, if the user takes a bath immediately after the reheating operation by the heat retention operation is completed, if the user feels uncomfortable at a temperature higher than the set temperature, or if the set temperature is changed with the remote control before taking a bath, The only way to check how the current bathtub water temperature is compared to the bathtub set temperature is to go to the bathroom and check the bathtub water temperature by yourself, which is not easy to use and makes you feel uncomfortable depending on the bathtub water temperature. was there.

In order to solve the above problems, the present invention has a change switch and a notification means that allow the user to arbitrarily change the bath set temperature, a remote control in the bathroom provided in the bathroom, and whether or not a person has entered the bathroom. The temperature of the bathtub water is high in the bath hot water supply device provided with a person detecting means for detecting the temperature and a main body control means for performing a reheating operation in which the bathtub water is heated to at least the bath set temperature or higher. A storage means for storing caution information in advance and a determination means for determining whether the bathtub water temperature is high are provided, and when the person detection means detects that a person has entered the room, the change is made. When the change elapsed time from lowering the bath set temperature by operating the switch to entering the room is shorter than the preset change reference time, the determination means determines that the bathtub water temperature is high. The main body control means is configured to notify the attention information stored in the storage means from the notification means of the remote control in the bathroom.

Further, in order to solve the above problems, the present invention has a change switch and a notification means that allow the user to arbitrarily change the bath set temperature, a remote control in the bathroom provided in the bathroom, and a person entering the bathroom. In a bath hot water supply device equipped with a person detecting means for detecting whether or not the bathtub water is used and a main body control means for performing a reheating operation in which the bathtub water is heated to at least the bath set temperature or higher, the bathtub water temperature becomes high. When a storage means for preliminarily storing warning information and a determination means for determining whether the bathtub water temperature is high are provided and the person detection means detects that a person has entered the room, the front When the change elapsed time from lowering the bath set temperature to entering the room by operating the change switch is shorter than the preset change reference time, the determination means determines that the bathtub water temperature is high. The determination was made, and the main body control means was made to notify the attention-calling information stored in the storage means from the notification means of the remote control in the bathroom.

According to the present invention, at the time of detecting entry into the room, the determination means determines whether or not the temperature of the bathtub water is high, and if it is determined that the temperature may be high, the determination means notifies the attention information. It is possible to prevent the temperature of the bathtub water from becoming hot and uncomfortable when the user takes a bath, and the timing of notification is when the user enters the room. I can tell you.

Schematic diagram showing the configuration of the first embodiment of the present invention Control function block diagram of the same embodiment Flow chart diagram for explaining the operation of the same embodiment Flow chart diagram for explaining the operation of the second embodiment Flow chart diagram for explaining the operation of the third embodiment Flow chart diagram for explaining the operation of the fourth embodiment

Next, the bath water heater of the first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing the configuration of a bath hot water supply device. The water supply bypass pipe 5 branched from the pipe 2 connects the hot water supply mixing valve that mixes the hot water from the hot water supply pipe 3 and the water from the water supply bypass pipe 4, and 6 connects the outlet of the hot water supply mixing valve 5 and the hot water supply tap 7. A hot water supply pipe, 8 is a hot water supply flow sensor that detects the flow rate of hot water flowing through the hot water supply pipe 6, 9 is a hot water supply temperature sensor that detects the temperature of hot water flowing through the hot water supply pipe 6, and 10 is a hot water supply temperature sensor that detects the temperature of the hot water supply flowing through the water supply bypass pipe 4. It is a water supply temperature sensor.

Reference numeral 11 is a bath mixing valve that mixes hot water from the hot water outlet pipe 3 and water from the water supply bypass pipe 4, and 12 is a hot water filling pipe for filling the hot water from the bath mixing valve 11 into the bathtub 13 installed in the bathroom. , 14 is a hot water filling flow sensor that detects the flow rate of hot water flowing through the hot water filling pipe 12, 15 is a hot water filling temperature sensor that detects the temperature of hot water flowing through the hot water filling pipe 12, and 16 opens and closes the flow path of the hot water filling pipe 12. The hot water filling electromagnetic valve 17 is a hot water storage temperature sensor provided on the upper and lower sides of the side surface of the hot water storage tank 1 to detect the hot water storage temperature.

18 is composed of a stainless steel serpentine tube arranged in the hot water storage tank 1, a bath heat exchanger for heating the bath water in the bathtub 13, and 19 is a bathtub water circulating between the bathtub 13 and the bath heat exchanger 18. A bath circulation circuit that can be connected as possible, 20 is a bath circulation pump for sucking bathtub water in the bathtub 13 and pumping it to the bath heat exchanger 18 to circulate the bathtub water, and 21 is for detecting the temperature of the bathtub water. The bathtub water temperature sensor 22 is a water level sensor that detects the water level in the bathtub 13 by detecting the water pressure, and a hot water filling pipe 12 is connected in the middle of the bath circulation circuit 19.

23 is a heat pump type heating means for heating the hot water in the hot water storage tank 1, 24 is a heating circulation circuit for connecting the hot water storage tank 1 and the heating means 23 so that hot water can be circulated, and 25 is a heating circulation pump for circulating hot water. Is.

Reference numeral 26 denotes an out-of-bathroom remote controller (remote controller) provided outside the bathroom, which is a display unit 26a for notifying the operating state and setting state of the hot water supply device, a speaker 26b for outputting voice data, a notification sound, and the like, and a bathtub 13. It is equipped with a bath switch 26c for starting hot water filling operation and reheating operation, a change switch 26d for changing the bath set temperature, and a control means 26e.

Reference numeral 27 denotes an in-bathroom remote controller (remote controller) provided in the bathroom, which is a display unit 27a as a notification means for notifying the operating state and setting state of the hot water supply device, and a notification means for outputting voice data, notification sound, and the like. A speaker 27b, a bath switch 27c for starting a hot water filling operation or a reheating operation in the bathtub 13, a change switch 27d for changing the bath set temperature, a control means 27e, and a bathroom temperature sensor for detecting the room temperature in the bathroom. 28 and a person detecting means 29 for detecting entry and exit into the bathroom are provided.

Reference numeral 30 is a main body control means for controlling the operation of the hot water supply device, and is a hot water supply flow rate sensor 8, a hot water supply temperature sensor 9, a water supply temperature sensor 10, a hot water filling flow rate sensor 14, a hot water filling temperature sensor 15, a hot water storage temperature sensor 17, and a bath water temperature. The detected values of the sensor 21, the water level sensor 22, and the bathroom temperature sensor 28 are input to control the operation of the hot water supply mixing valve 5, the bath mixing valve 11, the hot water filling electromagnetic valve 16, the bath circulation pump 20, and the heating means 23, and also control the operation of the bathroom. It is connected to the external remote control 26 and the indoor remote control 27 so that necessary information can be transmitted and received. Here, the main body control means 30 has a logic circuit such as an MPU and controls the operation according to a program stored in advance while referring to the memory.

Next, the control function block diagram of the embodiment of the present invention shown in FIG. 2 will be described. The main body control means 30 has the bathtub water from the detection value of the bathtub water temperature sensor 21 or the elapsed time from the specific operation of the remote controller. A determination means 30a for determining a state in which the temperature may be high is provided.

The control means 27e of the remote controller 27 in the bathroom is provided with a storage means 27f for storing in advance warning information for noting that the bathtub water temperature is high.

When a person enters the bathroom, a notification such as "The temperature of the bath is high. Please be careful when taking a bath." Is sent to the storage means 27f as warning information. It is done based on the result.

Next, the operation of the bath water heater of the present invention will be described.

<Boiling operation>
At the start time of a predetermined time zone (midnight time zone) where the unit price of electricity is low, the main body control means 37 causes the heating means 23 to start boiling the amount of hot water corresponding to the amount of the hot water supply load up to that point. The heating means 23 starts driving the heating circulation pump 25 to boil the hot water taken out from the lower part of the hot water storage tank 1 to the hot water storage tank 1 by transmitting the boiling target temperature and the instruction to start boiling. Return to the upper part, boil from the upper part of the hot water storage tank 1 and store hot water at the set temperature in a stacked manner, and the main body control means 30 boils up to the bottom of the hot water storage tank 1 or when the end time of the predetermined time zone is reached, the heating means 23 is instructed to stop boiling, and the heating means 23 drives and stops the heating circulation pump 25 to end the boiling operation.

<Hot water supply>
When the hot water tap 7 is opened, city water flows into the bottom of the hot water storage tank 1 from the water supply pipe 2, and hot water is discharged from the top of the hot water storage tank 1 through the hot water outlet pipe 3, and the hot water supply mixing valve 5 bypasses the water supply. It is mixed with water from the pipe 4 and passes through the hot water supply pipe 6. Then, when the hot water supply flow rate sensor 8 detects the minimum amount of working water or more, the main body control means 30 feedback-controls the valve opening degree of the hot water supply mixing valve 5 so that the temperature detected by the hot water supply temperature sensor 9 matches the hot water supply set temperature. Then, hot water is supplied at the set temperature. Then, when the hot water supply flow rate sensor 8 detects that the amount of water is less than the minimum operating water amount due to the hot water supply tap 7 being closed or the like, the main body control means 30 stops the feedback control of the valve opening degree of the hot water supply mixing valve 5 to stop the hot water supply. ing.

<Automatic bath operation>
Next, the automatic bath operation will be described. When the bath switch 26c of the remote control 26 outside the bathroom or the bath switch 27c of the remote control 27 inside the bathroom is operated, the main body control means 30 opens the hot water filling electromagnetic valve 16 and the temperature detected by the hot water filling temperature sensor 15 is a bath. The valve opening degree of the bath mixing valve 11 is feedback-controlled so as to match the set temperature, and the hot water filling operation at the bath set temperature is started.

Then, the main body control means 30 closes the hot water filling solenoid valve 16 when the integrated value of the hot water filling flow rate detected by the hot water filling flow rate sensor 14 becomes the bath set hot water amount, or when the water level sensor 22 detects the bath set water level. Finish the hot water filling operation and keep the bath warm.

In the heat retention operation of the bath, the bath circulation pump 20 is driven at regular intervals, the bathtub water temperature sensor 21 checks the temperature of the bathtub water, and when it is detected that the temperature is lower than the bath set temperature, the circulation is continued. The bath water is heated by the bath heat exchanger 18. Then, when it is confirmed by the bathtub water temperature sensor 21 that the temperature of the bathtub water has risen to the bath set temperature or higher, the driving of the bath circulation pump 20 is stopped.

Further, the main body control means 30 stores the water level in the bathtub 13 when the hot water filling is stopped based on the detection value of the water level sensor 22, and when the water level in the bathtub 13 drops from the stored water level, it reaches the original water level. Perform a hot water refilling operation.

Next, a first embodiment for notifying the attention alert information according to the temperature detected by the bathtub water temperature sensor 21 of the characteristic operation of the present invention will be described.

When the main body control means 30 detects that a person has entered the bathroom by the person detecting means 29 provided in the remote control 27 in the bathroom (S1 is Yes), the bath circulation pump 20 is driven and the bathtub water temperature sensor 21 is used to drive the bathtub. The temperature of water is detected (S2).

The determination means 30a confirms whether the detected bathtub water temperature is higher or lower than the predetermined reference temperature (S3), and the main body control means 30 determines that the determination means 30a determines that the bathtub water temperature is lower than the reference temperature. (S3 is No), no alert is given (S4), and when it is determined that the bathtub water temperature is higher than the reference temperature (S3 is Yes), the speaker 27b of the remote control 27 in the bathroom stores the bathtub in advance in the storage means 27f. A warning is given to the effect that the temperature of the bathtub water is high (S5). Here, the reference temperature is set in advance to the bathtub water temperature (here, 44 ° C.), which the bathtub water temperature is high and the bather thinks is hot.

In this way, the predetermined condition of the determination means 30a of the first embodiment is determined by whether or not the bathtub water temperature is higher than the predetermined reference temperature, and when a person enters the bathroom, the bathtub water is determined. When the temperature exceeds the reference temperature, it means that the bathtub water is high temperature, and the main body control means 30 notifies the warning information that the bathtub water stored in the storage means 27f is high temperature. This prevents the person taking a bath from unexpectedly taking a bath and making the bathtub water too hot and uncomfortable, and the person detecting means 29 is used to notify the person when the person enters the bathroom. Therefore, it is possible to surely notify the bather of the alert information at an appropriate timing.

Next, a second embodiment for notifying the attention alert information according to the elapsed time after the reheating operation or the bath heat insulating operation by the automatic bath operation is performed will be described.

When the bath heat retention operation by reheating operation or automatic bath operation is performed (S6 is Yes), the main body control means 30 starts counting the elapsed heating time (S7), and detects a person provided in the remote control 27 in the bathroom. When the means 29 detects that a person has entered the bathroom (S8 is Yes), the main body control means 30 finishes counting the elapsed heating time (S9), and the reheating operation or the bath heat insulation operation by the automatic bath operation is performed. The elapsed heating time after the heating is confirmed (S10).

The determination means 30a confirms whether the confirmed heating elapsed time is longer or shorter than the predetermined heating reference time (S11), and the main body control means 30 confirms that the heating elapsed time is longer than the heating reference time (S11 is No.). ), When the elapsed heating time is shorter than the heating reference time (S11 is Yes) without calling attention (S12), the bathtub water temperature stored in advance from the speaker 27b of the remote control 27 in the bathroom to the storage means 27f is high. A warning to the effect is given (S13). Here, the heating reference time is set in advance as the time required for the temperature of the bathtub water to cool down to the bath set temperature (here, 5 minutes) from the immediately preceding reheating operation.

In this way, the predetermined condition of the determination means 30a of the second embodiment is determined by whether the elapsed time from the reheating operation is longer or shorter than the predetermined heating reference time, and the person is in the bathroom. If the elapsed heating time after the reheating operation is shorter than the heating reference time when entering the room, not much time has passed since the bathtub water was heated to a high temperature in the reheating operation, and the temperature is higher than the set temperature of the bath. Since it is hot and hot, the main body control means 30 notifies the warning information that the bathtub water stored in the storage means 27f is hot, so that the person taking a bath unexpectedly takes a bath. This prevents the bathtub water from becoming too hot and uncomfortable, and the person detection means 29 is used to notify the person when the person enters the bathroom, so be sure to pay attention to the bather at an appropriate time. It is possible to inform the arousal information.

Next, a third embodiment will be described in which the remote controller 26 outside the bathroom or the remote controller 27 inside the bathroom is operated to notify the attention alert information according to the elapsed time from lowering the bath set temperature.

When the operation of lowering the bath set temperature is performed by the remote controller 26 outside the bathroom or the remote controller 27 inside the bathroom (S14 is Yes), the main body control means 30 starts counting the elapsed time of change (S15) and prepares for the remote controller 27 in the bathroom. When the person detecting means 29 detects that a person has entered the bathroom (S16 is Yes), the main body control means 30 finishes counting the elapsed time of change (S17), and changes after lowering the bath set temperature. Check the elapsed time (S18).

The determination means 30a confirms whether the confirmed change elapsed time is longer or shorter than the predetermined change reference time (S19), and the main body control means 30 confirms that the change elapsed time is longer than the change reference time (S19 is No). ), When the change elapsed time is shorter than the change reference time (S19 is Yes) without calling attention (S20), the bathtub water temperature stored in advance from the speaker 27b of the remote control 27 in the bathroom to the storage means 27f is high. A warning to the effect is given (S21). Here, the change reference time is set in advance as the time required for the bath set temperature to be lowered to the bath set temperature (here, 5 minutes) after the bath set temperature is lowered by the remote control operation.

In this way, the predetermined condition of the determination means 30a of the third embodiment is determined based on whether the elapsed time from lowering the bath set temperature by remote control operation is longer or shorter than the predetermined change elapsed time. , When a person enters the bathroom, if the change elapsed time after lowering the bath set temperature is shorter than the change reference time, it has not cooled from the previous bath set temperature and the bath setting desired by the bather Since the temperature is higher than the temperature, the main body control means 30 notifies the warning information that the bath water stored in the storage means 27f is hot, so that the person taking a bath unexpectedly In addition to preventing the bath water from becoming too hot and uncomfortable when taking a bath, the person detection means 29 is used to notify the person when a person enters the bathroom, so that the person taking a bath can be sure of the appropriate timing. It is possible to inform the attention information.

Next, a fourth embodiment will be described in which the temperature detected by the bathtub water temperature sensor 21 is compared with the preset bath temperature and the alert information is notified.

When the main body control means 30 detects that a person has entered the bathroom by the person detection means 29 provided in the remote controller 27 in the bathroom (S22 is Yes), the main body control means 30 confirms the set bath temperature (Yes). S23).

The determination means 30a confirms whether the confirmed bath set temperature is higher or lower than the predetermined reference set temperature (S24), and if it is determined that the bath set temperature is lower than the reference set temperature (S24 is No), be careful. When it is determined that the bath set temperature is higher than the reference set temperature (S24 is Yes) without arousing (S25), the bath water temperature stored in advance in the storage means 27f from the speaker 27b of the remote control 27 in the bathroom is high. A warning to the effect is given (S26). Here, the reference set temperature is set in advance to the bathtub water temperature (here, 44 ° C.), which the bath set temperature is high and the bather thinks is hot.

In this way, the predetermined condition of the determination means 30a of the fourth embodiment is determined by whether or not the bath set temperature is higher than the predetermined reference set temperature, and when a person enters the bathroom, the bath is determined. When the set temperature exceeds the reference set temperature, it means that the bathtub water is high temperature, and the main body control means 30 provides warning information that the bathtub water stored in the storage means 27f is high temperature. By notifying the person taking a bath, the bathtub water is prevented from becoming uncomfortable due to the temperature of the bathtub being too hot, and the warning information is notified by the person detecting means 29 at the timing when the person enters the bathroom. It is possible to reliably notify the alert information at an appropriate timing.

The present invention is not limited to the above embodiment, and can be modified without changing the gist of the invention. For example, in the present invention, the reference temperature, the heating reference time, the change reference time, and the reference set temperature. The temperature and time for determining high temperature are set as in the above, but this value may be changed as appropriate.

Further, in the third embodiment, the change reference time was set to 5 minutes, but the change reference time required to cool the bathtub water is set according to the temperature difference between the bath set temperature before and after the change. It may be changed as appropriate (for example, if the temperature difference between before and after the change is 1 ° C, it is 5 minutes, and if the temperature difference between before and after the change is 2 ° C, it is 7 minutes).

Further, although the hot water storage type bath water heater that heats hot water by the heat pump type heating means 23 has been described as an example, for example, an instantaneous heating type bath water heater that uses gas or kerosene as fuel may be used.

In addition, the alert information is notified by voice from the speaker 27b on the assumption that there is a person near the remote controller 27 in the bathroom when entering the room, but in addition, character data is displayed on the display unit 27a of the remote controller 27 in the bathroom. There is also a method of notifying as, a notification by lighting a lamp, and the like, and the notification may be performed in some combinations.

13 Bathtub 21 Bathtub water temperature sensor 27 Bathroom remote control (remote controller)
27a Display unit (notification means)
27b speaker (notification means)
27c Bath switch 27d Change switch 27e Control means 27f Storage means 29 Person detection means 30 Main unit control means (control means)
30a Judgment means

Claims (2)

It has a change switch and notification means that allow the user to arbitrarily change the bath set temperature, a remote control in the bathroom provided in the bathroom, a person detection means that detects whether or not a person has entered the bathroom, and bathtub water. In a bath hot water supply device equipped with a main body control means for performing a reheating operation in which the bathtub is heated to at least the set temperature of the bath, the caution information for noting that the bathtub water temperature is high is stored in advance. A storage means and a determination means for determining whether the bathtub water temperature is high are provided , and when it is detected by the person detecting means that a person has entered the room , from the end of the reheating operation immediately before to entering the room. When the elapsed heating time is shorter than the preset heating reference time, the determination means determines that the bathtub water temperature is high, and the main body control means is stored in the storage means. A bath hot water supply device characterized in that the alert information is notified from the notification means of the remote control in the bathroom. It has a change switch and notification means that allow the user to arbitrarily change the bath set temperature, a remote control in the bathroom provided in the bathroom, a person detection means that detects whether or not a person has entered the bathroom, and bathtub water. In a bath hot water supply device equipped with a main body control means for performing a reheating operation in which the bathtub is heated to at least the set temperature of the bath, the caution information for noting that the bathtub water temperature is high is stored in advance. A storage means and a determination means for determining whether the bathtub water temperature is high are provided , and when it is detected by the person detecting means that a person has entered the room, the change switch is operated to lower the bath set temperature. When the change elapsed time from the time of entering the room to entering the room is shorter than the preset change reference time, the determination means determines that the bathtub water temperature is high, and the main body control means stores the storage means. A bath hot water supply device characterized in that the stored alert information is notified from the notification means of the remote control in the bathroom.

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